From 584a0146ec4989f30d0aef46ce1ea6f6ba22a690 Mon Sep 17 00:00:00 2001 From: Philippe Cornu Date: Mon, 9 Apr 2018 17:24:27 +0200 Subject: drm: clarify adjusted_mode documentation for bridges This patch clarifies the adjusted_mode documentation for bridges. Signed-off-by: Philippe Cornu Signed-off-by: Laurent Pinchart Reviewed-by: Archit Taneja Link: https://patchwork.freedesktop.org/patch/msgid/20180409152427.12449-1-philippe.cornu@st.com --- include/drm/drm_bridge.h | 16 ++++++++++++++++ include/drm/drm_crtc.h | 11 +++++++---- 2 files changed, 23 insertions(+), 4 deletions(-) (limited to 'include') diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h index 3270fec46979..9917651a7fdd 100644 --- a/include/drm/drm_bridge.h +++ b/include/drm/drm_bridge.h @@ -178,6 +178,22 @@ struct drm_bridge_funcs { * then this would be &drm_encoder_helper_funcs.mode_set. The display * pipe (i.e. clocks and timing signals) is off when this function is * called. + * + * The adjusted_mode parameter is the mode output by the CRTC for the + * first bridge in the chain. It can be different from the mode + * parameter that contains the desired mode for the connector at the end + * of the bridges chain, for instance when the first bridge in the chain + * performs scaling. The adjusted mode is mostly useful for the first + * bridge in the chain and is likely irrelevant for the other bridges. + * + * For atomic drivers the adjusted_mode is the mode stored in + * &drm_crtc_state.adjusted_mode. + * + * NOTE: + * + * If a need arises to store and access modes adjusted for other + * locations than the connection between the CRTC and the first bridge, + * the DRM framework will have to be extended with DRM bridge states. */ void (*mode_set)(struct drm_bridge *bridge, struct drm_display_mode *mode, diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h index a2d81d2907a9..5cf7adeae6a5 100644 --- a/include/drm/drm_crtc.h +++ b/include/drm/drm_crtc.h @@ -134,10 +134,13 @@ struct drm_crtc_state { * * Internal display timings which can be used by the driver to handle * differences between the mode requested by userspace in @mode and what - * is actually programmed into the hardware. It is purely driver - * implementation defined what exactly this adjusted mode means. Usually - * it is used to store the hardware display timings used between the - * CRTC and encoder blocks. + * is actually programmed into the hardware. + * + * For drivers using drm_bridge, this stores hardware display timings + * used between the CRTC and the first bridge. For other drivers, the + * meaning of the adjusted_mode field is purely driver implementation + * defined information, and will usually be used to store the hardware + * display timings used between the CRTC and encoder blocks. */ struct drm_display_mode adjusted_mode; -- cgit v1.2.3 From 5d435b46fa68c53af8dc3a69ff2936b8f17aa294 Mon Sep 17 00:00:00 2001 From: Philippe Cornu Date: Tue, 15 May 2018 22:37:36 +0200 Subject: drm/bridge: spelling and coding style minor fixes Minor fixes detected with "scripts/checkpatch.pl --strict" Signed-off-by: Philippe Cornu Acked-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20180515203736.9224-1-philippe.cornu@st.com --- include/drm/drm_bridge.h | 10 +++++----- 1 file changed, 5 insertions(+), 5 deletions(-) (limited to 'include') diff --git a/include/drm/drm_bridge.h b/include/drm/drm_bridge.h index 9917651a7fdd..70131ab57e8f 100644 --- a/include/drm/drm_bridge.h +++ b/include/drm/drm_bridge.h @@ -97,7 +97,7 @@ struct drm_bridge_funcs { /** * @mode_fixup: * - * This callback is used to validate and adjust a mode. The paramater + * This callback is used to validate and adjust a mode. The parameter * mode is the display mode that should be fed to the next element in * the display chain, either the final &drm_connector or the next * &drm_bridge. The parameter adjusted_mode is the input mode the bridge @@ -301,15 +301,15 @@ int drm_bridge_attach(struct drm_encoder *encoder, struct drm_bridge *bridge, struct drm_bridge *previous); bool drm_bridge_mode_fixup(struct drm_bridge *bridge, - const struct drm_display_mode *mode, - struct drm_display_mode *adjusted_mode); + const struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode); enum drm_mode_status drm_bridge_mode_valid(struct drm_bridge *bridge, const struct drm_display_mode *mode); void drm_bridge_disable(struct drm_bridge *bridge); void drm_bridge_post_disable(struct drm_bridge *bridge); void drm_bridge_mode_set(struct drm_bridge *bridge, - struct drm_display_mode *mode, - struct drm_display_mode *adjusted_mode); + struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode); void drm_bridge_pre_enable(struct drm_bridge *bridge); void drm_bridge_enable(struct drm_bridge *bridge); -- cgit v1.2.3 From 50525c332b55f899fb231d786931d0b45a3f3d41 Mon Sep 17 00:00:00 2001 From: Stanislav Lisovskiy Date: Tue, 15 May 2018 16:59:27 +0300 Subject: drm: content-type property for HDMI connector MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Added content_type property to drm_connector_state in order to properly handle external HDMI TV content-type setting. v2: * Moved helper function which attaches content type property to the drm core, as was suggested. Removed redundant connector state initialization. v3: * Removed caps in drm_content_type_enum_list. After some discussion it turned out that HDMI Spec 1.4 was wrongly assuming that IT Content(itc) bit doesn't affect Content type states, however itc bit needs to be manupulated as well. In order to not expose additional property for itc, for sake of simplicity it was decided to bind those together in same "content type" property. v4: * Added it_content checking in intel_digital_connector_atomic_check. Fixed documentation for new content type enum. v5: * Moved patch revision's description to commit messages. v6: * Minor naming fix for the content type enumeration string. v7: * Fix parameter name for documentation and parameter alignment in order not to get warning. Added Content Type description to new HDMI connector properties section. v8: * Thrown away unneeded numbers from HDMI content-type property description. Switch to strings desription instead of plain definitions. v9: * Moved away hdmi specific content-type enum from drm_connector_state. Content type property should probably not be bound to any specific connector interface in drm_connector_state. Same probably should be done to hdmi_picture_aspect_ration enum which is also contained in drm_connector_state. Added special helper function to get derive hdmi specific relevant infoframe fields. v10: * Added usage description to HDMI properties kernel doc. v11: * Created centralized function for filling HDMI AVI infoframe, based on correspondent DRM property value. Acked-by: Hans Verkuil Acked-by: Daniel Vetter Signed-off-by: Stanislav Lisovskiy Link: https://patchwork.freedesktop.org/patch/msgid/20180515135928.31092-2-stanislav.lisovskiy@intel.com [vsyrjala: clean up checkpatch multiple blank lines warnings] Signed-off-by: Ville Syrjälä --- Documentation/gpu/drm-kms.rst | 6 ++ Documentation/gpu/kms-properties.csv | 1 + drivers/gpu/drm/drm_atomic.c | 4 ++ drivers/gpu/drm/drm_connector.c | 113 +++++++++++++++++++++++++++++++++++ drivers/gpu/drm/drm_edid.c | 8 +++ include/drm/drm_connector.h | 13 ++++ include/drm/drm_mode_config.h | 5 ++ include/uapi/drm/drm_mode.h | 7 +++ 8 files changed, 157 insertions(+) (limited to 'include') diff --git a/Documentation/gpu/drm-kms.rst b/Documentation/gpu/drm-kms.rst index 1dffd1ac4cd4..e233c2626bd0 100644 --- a/Documentation/gpu/drm-kms.rst +++ b/Documentation/gpu/drm-kms.rst @@ -517,6 +517,12 @@ Standard Connector Properties .. kernel-doc:: drivers/gpu/drm/drm_connector.c :doc: standard connector properties +HDMI Specific Connector Properties +----------------------------- + +.. kernel-doc:: drivers/gpu/drm/drm_connector.c + :doc: HDMI connector properties + Plane Composition Properties ---------------------------- diff --git a/Documentation/gpu/kms-properties.csv b/Documentation/gpu/kms-properties.csv index 07ed22ea3bd6..bfde04eddd14 100644 --- a/Documentation/gpu/kms-properties.csv +++ b/Documentation/gpu/kms-properties.csv @@ -17,6 +17,7 @@ Owner Module/Drivers,Group,Property Name,Type,Property Values,Object attached,De ,Virtual GPU,“suggested X”,RANGE,"Min=0, Max=0xffffffff",Connector,property to suggest an X offset for a connector ,,“suggested Y”,RANGE,"Min=0, Max=0xffffffff",Connector,property to suggest an Y offset for a connector ,Optional,"""aspect ratio""",ENUM,"{ ""None"", ""4:3"", ""16:9"" }",Connector,TDB +,Optional,"""content type""",ENUM,"{ ""No Data"", ""Graphics"", ""Photo"", ""Cinema"", ""Game"" }",Connector,TBD i915,Generic,"""Broadcast RGB""",ENUM,"{ ""Automatic"", ""Full"", ""Limited 16:235"" }",Connector,"When this property is set to Limited 16:235 and CTM is set, the hardware will be programmed with the result of the multiplication of CTM by the limited range matrix to ensure the pixels normaly in the range 0..1.0 are remapped to the range 16/255..235/255." ,,“audio”,ENUM,"{ ""force-dvi"", ""off"", ""auto"", ""on"" }",Connector,TBD ,SDVO-TV,“mode”,ENUM,"{ ""NTSC_M"", ""NTSC_J"", ""NTSC_443"", ""PAL_B"" } etc.",Connector,TBD diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c index dc850b4b6e21..07fef42869aa 100644 --- a/drivers/gpu/drm/drm_atomic.c +++ b/drivers/gpu/drm/drm_atomic.c @@ -1270,6 +1270,8 @@ static int drm_atomic_connector_set_property(struct drm_connector *connector, state->link_status = val; } else if (property == config->aspect_ratio_property) { state->picture_aspect_ratio = val; + } else if (property == config->content_type_property) { + state->content_type = val; } else if (property == connector->scaling_mode_property) { state->scaling_mode = val; } else if (property == connector->content_protection_property) { @@ -1355,6 +1357,8 @@ drm_atomic_connector_get_property(struct drm_connector *connector, *val = state->link_status; } else if (property == config->aspect_ratio_property) { *val = state->picture_aspect_ratio; + } else if (property == config->content_type_property) { + *val = state->content_type; } else if (property == connector->scaling_mode_property) { *val = state->scaling_mode; } else if (property == connector->content_protection_property) { diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c index 9b9ba5d5ec0c..002b244391f9 100644 --- a/drivers/gpu/drm/drm_connector.c +++ b/drivers/gpu/drm/drm_connector.c @@ -720,6 +720,14 @@ static const struct drm_prop_enum_list drm_aspect_ratio_enum_list[] = { { DRM_MODE_PICTURE_ASPECT_16_9, "16:9" }, }; +static const struct drm_prop_enum_list drm_content_type_enum_list[] = { + { DRM_MODE_CONTENT_TYPE_NO_DATA, "No Data" }, + { DRM_MODE_CONTENT_TYPE_GRAPHICS, "Graphics" }, + { DRM_MODE_CONTENT_TYPE_PHOTO, "Photo" }, + { DRM_MODE_CONTENT_TYPE_CINEMA, "Cinema" }, + { DRM_MODE_CONTENT_TYPE_GAME, "Game" }, +}; + static const struct drm_prop_enum_list drm_panel_orientation_enum_list[] = { { DRM_MODE_PANEL_ORIENTATION_NORMAL, "Normal" }, { DRM_MODE_PANEL_ORIENTATION_BOTTOM_UP, "Upside Down" }, @@ -996,6 +1004,84 @@ int drm_mode_create_dvi_i_properties(struct drm_device *dev) } EXPORT_SYMBOL(drm_mode_create_dvi_i_properties); +/** + * DOC: HDMI connector properties + * + * content type (HDMI specific): + * Indicates content type setting to be used in HDMI infoframes to indicate + * content type for the external device, so that it adjusts it's display + * settings accordingly. + * + * The value of this property can be one of the following: + * + * No Data: + * Content type is unknown + * Graphics: + * Content type is graphics + * Photo: + * Content type is photo + * Cinema: + * Content type is cinema + * Game: + * Content type is game + * + * Drivers can set up this property by calling + * drm_connector_attach_content_type_property(). Decoding to + * infoframe values is done through + * drm_hdmi_get_content_type_from_property() and + * drm_hdmi_get_itc_bit_from_property(). + */ + +/** + * drm_connector_attach_content_type_property - attach content-type property + * @connector: connector to attach content type property on. + * + * Called by a driver the first time a HDMI connector is made. + */ +int drm_connector_attach_content_type_property(struct drm_connector *connector) +{ + if (!drm_mode_create_content_type_property(connector->dev)) + drm_object_attach_property(&connector->base, + connector->dev->mode_config.content_type_property, + DRM_MODE_CONTENT_TYPE_NO_DATA); + return 0; +} +EXPORT_SYMBOL(drm_connector_attach_content_type_property); + + +/** + * drm_hdmi_avi_infoframe_content_type() - fill the HDMI AVI infoframe + * content type information, based + * on correspondent DRM property. + * @frame: HDMI AVI infoframe + * @conn_state: DRM display connector state + * + */ +void drm_hdmi_avi_infoframe_content_type(struct hdmi_avi_infoframe *frame, + const struct drm_connector_state *conn_state) +{ + switch (conn_state->content_type) { + case DRM_MODE_CONTENT_TYPE_GRAPHICS: + frame->content_type = HDMI_CONTENT_TYPE_GRAPHICS; + break; + case DRM_MODE_CONTENT_TYPE_CINEMA: + frame->content_type = HDMI_CONTENT_TYPE_CINEMA; + break; + case DRM_MODE_CONTENT_TYPE_GAME: + frame->content_type = HDMI_CONTENT_TYPE_GAME; + break; + case DRM_MODE_CONTENT_TYPE_PHOTO: + frame->content_type = HDMI_CONTENT_TYPE_PHOTO; + break; + default: + /* Graphics is the default(0) */ + frame->content_type = HDMI_CONTENT_TYPE_GRAPHICS; + } + + frame->itc = conn_state->content_type != DRM_MODE_CONTENT_TYPE_NO_DATA; +} +EXPORT_SYMBOL(drm_hdmi_avi_infoframe_content_type); + /** * drm_create_tv_properties - create TV specific connector properties * @dev: DRM device @@ -1260,6 +1346,33 @@ int drm_mode_create_aspect_ratio_property(struct drm_device *dev) } EXPORT_SYMBOL(drm_mode_create_aspect_ratio_property); +/** + * drm_mode_create_content_type_property - create content type property + * @dev: DRM device + * + * Called by a driver the first time it's needed, must be attached to desired + * connectors. + * + * Returns: + * Zero on success, negative errno on failure. + */ +int drm_mode_create_content_type_property(struct drm_device *dev) +{ + if (dev->mode_config.content_type_property) + return 0; + + dev->mode_config.content_type_property = + drm_property_create_enum(dev, 0, "content type", + drm_content_type_enum_list, + ARRAY_SIZE(drm_content_type_enum_list)); + + if (dev->mode_config.content_type_property == NULL) + return -ENOMEM; + + return 0; +} +EXPORT_SYMBOL(drm_mode_create_content_type_property); + /** * drm_mode_create_suggested_offset_properties - create suggests offset properties * @dev: DRM device diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 40e1e24f2ff0..82f1ab09169d 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -4872,6 +4872,14 @@ drm_hdmi_avi_infoframe_from_display_mode(struct hdmi_avi_infoframe *frame, frame->picture_aspect = HDMI_PICTURE_ASPECT_NONE; + /* + * As some drivers don't support atomic, we can't use connector state. + * So just initialize the frame with default values, just the same way + * as it's done with other properties here. + */ + frame->content_type = HDMI_CONTENT_TYPE_GRAPHICS; + frame->itc = 0; + /* * Populate picture aspect ratio from either * user input (if specified) or from the CEA mode list. diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index 675cc3f8cf85..ee4c48218c85 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -418,6 +418,14 @@ struct drm_connector_state { */ enum hdmi_picture_aspect picture_aspect_ratio; + /** + * @content_type: Connector property to control the + * HDMI infoframe content type setting. + * The %DRM_MODE_CONTENT_TYPE_\* values much + * match the values. + */ + unsigned int content_type; + /** * @scaling_mode: Connector property to control the * upscaling, mostly used for built-in panels. @@ -1089,11 +1097,16 @@ int drm_mode_create_tv_properties(struct drm_device *dev, unsigned int num_modes, const char * const modes[]); int drm_mode_create_scaling_mode_property(struct drm_device *dev); +int drm_connector_attach_content_type_property(struct drm_connector *dev); int drm_connector_attach_scaling_mode_property(struct drm_connector *connector, u32 scaling_mode_mask); int drm_connector_attach_content_protection_property( struct drm_connector *connector); int drm_mode_create_aspect_ratio_property(struct drm_device *dev); +int drm_mode_create_content_type_property(struct drm_device *dev); +void drm_hdmi_avi_infoframe_content_type(struct hdmi_avi_infoframe *frame, + const struct drm_connector_state *conn_state); + int drm_mode_create_suggested_offset_properties(struct drm_device *dev); int drm_mode_connector_set_path_property(struct drm_connector *connector, diff --git a/include/drm/drm_mode_config.h b/include/drm/drm_mode_config.h index 33b3a96d66d0..fb45839179dd 100644 --- a/include/drm/drm_mode_config.h +++ b/include/drm/drm_mode_config.h @@ -726,6 +726,11 @@ struct drm_mode_config { * HDMI infoframe aspect ratio setting. */ struct drm_property *aspect_ratio_property; + /** + * @content_type_property: Optional connector property to control the + * HDMI infoframe content type setting. + */ + struct drm_property *content_type_property; /** * @degamma_lut_property: Optional CRTC property to set the LUT used to * convert the framebuffer's colors to linear gamma. diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h index 4b3a1bb58e68..971c016b368c 100644 --- a/include/uapi/drm/drm_mode.h +++ b/include/uapi/drm/drm_mode.h @@ -96,6 +96,13 @@ extern "C" { #define DRM_MODE_PICTURE_ASPECT_64_27 3 #define DRM_MODE_PICTURE_ASPECT_256_135 4 +/* Content type options */ +#define DRM_MODE_CONTENT_TYPE_NO_DATA 0 +#define DRM_MODE_CONTENT_TYPE_GRAPHICS 1 +#define DRM_MODE_CONTENT_TYPE_PHOTO 2 +#define DRM_MODE_CONTENT_TYPE_CINEMA 3 +#define DRM_MODE_CONTENT_TYPE_GAME 4 + /* Aspect ratio flag bitmask (4 bits 22:19) */ #define DRM_MODE_FLAG_PIC_AR_MASK (0x0F<<19) #define DRM_MODE_FLAG_PIC_AR_NONE \ -- cgit v1.2.3 From 0c08754b59da5557532d946599854e6df28edc22 Mon Sep 17 00:00:00 2001 From: Jyri Sarha Date: Thu, 26 Apr 2018 11:07:00 +0300 Subject: drm/panel: Add device_link from panel device to DRM device Add device_link from panel device (supplier) to DRM device (consumer) when drm_panel_attach() is called. This patch should protect the master DRM driver if an attached panel driver unbinds while it is in use. The device_link should make sure the DRM device is unbound before the panel driver becomes unavailable. The device_link is removed when drm_panel_detach() is called. The drm_panel_detach() should be called by the consumer DRM driver, not the panel driver, otherwise both drivers are racing to delete the same link. Signed-off-by: Jyri Sarha Reviewed-by: Eric Anholt Signed-off-by: Thierry Reding Link: https://patchwork.freedesktop.org/patch/msgid/b53584fd988d045c13de22d81825395b0ae0aad7.1524727888.git.jsarha@ti.com --- drivers/gpu/drm/drm_panel.c | 10 ++++++++++ include/drm/drm_panel.h | 1 + 2 files changed, 11 insertions(+) (limited to 'include') diff --git a/drivers/gpu/drm/drm_panel.c b/drivers/gpu/drm/drm_panel.c index 71e407574276..965530a6f4cd 100644 --- a/drivers/gpu/drm/drm_panel.c +++ b/drivers/gpu/drm/drm_panel.c @@ -24,6 +24,7 @@ #include #include +#include #include #include @@ -104,6 +105,13 @@ int drm_panel_attach(struct drm_panel *panel, struct drm_connector *connector) if (panel->connector) return -EBUSY; + panel->link = device_link_add(connector->dev->dev, panel->dev, 0); + if (!panel->link) { + dev_err(panel->dev, "failed to link panel to %s\n", + dev_name(connector->dev->dev)); + return -EINVAL; + } + panel->connector = connector; panel->drm = connector->dev; @@ -125,6 +133,8 @@ EXPORT_SYMBOL(drm_panel_attach); */ int drm_panel_detach(struct drm_panel *panel) { + device_link_del(panel->link); + panel->connector = NULL; panel->drm = NULL; diff --git a/include/drm/drm_panel.h b/include/drm/drm_panel.h index 14ac240a1f64..26a1b5fd8796 100644 --- a/include/drm/drm_panel.h +++ b/include/drm/drm_panel.h @@ -89,6 +89,7 @@ struct drm_panel { struct drm_device *drm; struct drm_connector *connector; struct device *dev; + struct device_link *link; const struct drm_panel_funcs *funcs; -- cgit v1.2.3 From 2f7e87692e0441abf27a9714991edd136e87363a Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Mon, 21 May 2018 09:21:28 +0100 Subject: drm/mm: Reject over-sized allocation requests early As we keep an rbtree of available holes sorted by their size, we can very easily determine if there is any hole large enough that might satisfy the allocation request. This helps when dealing with a highly fragmented address space and a request for a search by address. To cache the largest size, we convert into the cached rbtree variant which tracks the leftmost node for us. However, currently we sorted into ascending size order so the leftmost node is the smallest, and so to make it the largest hole we need to invert our sorting. Signed-off-by: Chris Wilson Cc: Joonas Lahtinen Reviewed-by: Joonas Lahtinen Link: https://patchwork.freedesktop.org/patch/msgid/20180521082131.13744-1-chris@chris-wilson.co.uk --- drivers/gpu/drm/drm_mm.c | 82 +++++++++++++++++++++++++++++++++--------------- include/drm/drm_mm.h | 2 +- 2 files changed, 58 insertions(+), 26 deletions(-) (limited to 'include') diff --git a/drivers/gpu/drm/drm_mm.c b/drivers/gpu/drm/drm_mm.c index 3166026a1874..7b4ad05fe1c0 100644 --- a/drivers/gpu/drm/drm_mm.c +++ b/drivers/gpu/drm/drm_mm.c @@ -239,6 +239,32 @@ static void drm_mm_interval_tree_add_node(struct drm_mm_node *hole_node, #define HOLE_SIZE(NODE) ((NODE)->hole_size) #define HOLE_ADDR(NODE) (__drm_mm_hole_node_start(NODE)) +static u64 rb_to_hole_size(struct rb_node *rb) +{ + return rb_entry(rb, struct drm_mm_node, rb_hole_size)->hole_size; +} + +static void insert_hole_size(struct rb_root_cached *root, + struct drm_mm_node *node) +{ + struct rb_node **link = &root->rb_root.rb_node, *rb = NULL; + u64 x = node->hole_size; + bool first = true; + + while (*link) { + rb = *link; + if (x > rb_to_hole_size(rb)) { + link = &rb->rb_left; + } else { + link = &rb->rb_right; + first = false; + } + } + + rb_link_node(&node->rb_hole_size, rb, link); + rb_insert_color_cached(&node->rb_hole_size, root, first); +} + static void add_hole(struct drm_mm_node *node) { struct drm_mm *mm = node->mm; @@ -247,7 +273,7 @@ static void add_hole(struct drm_mm_node *node) __drm_mm_hole_node_end(node) - __drm_mm_hole_node_start(node); DRM_MM_BUG_ON(!drm_mm_hole_follows(node)); - RB_INSERT(mm->holes_size, rb_hole_size, HOLE_SIZE); + insert_hole_size(&mm->holes_size, node); RB_INSERT(mm->holes_addr, rb_hole_addr, HOLE_ADDR); list_add(&node->hole_stack, &mm->hole_stack); @@ -258,7 +284,7 @@ static void rm_hole(struct drm_mm_node *node) DRM_MM_BUG_ON(!drm_mm_hole_follows(node)); list_del(&node->hole_stack); - rb_erase(&node->rb_hole_size, &node->mm->holes_size); + rb_erase_cached(&node->rb_hole_size, &node->mm->holes_size); rb_erase(&node->rb_hole_addr, &node->mm->holes_addr); node->hole_size = 0; @@ -282,38 +308,39 @@ static inline u64 rb_hole_size(struct rb_node *rb) static struct drm_mm_node *best_hole(struct drm_mm *mm, u64 size) { - struct rb_node *best = NULL; - struct rb_node **link = &mm->holes_size.rb_node; + struct rb_node *rb = mm->holes_size.rb_root.rb_node; + struct drm_mm_node *best = NULL; - while (*link) { - struct rb_node *rb = *link; + do { + struct drm_mm_node *node = + rb_entry(rb, struct drm_mm_node, rb_hole_size); - if (size <= rb_hole_size(rb)) { - link = &rb->rb_left; - best = rb; + if (size <= node->hole_size) { + best = node; + rb = rb->rb_right; } else { - link = &rb->rb_right; + rb = rb->rb_left; } - } + } while (rb); - return rb_hole_size_to_node(best); + return best; } static struct drm_mm_node *find_hole(struct drm_mm *mm, u64 addr) { + struct rb_node *rb = mm->holes_addr.rb_node; struct drm_mm_node *node = NULL; - struct rb_node **link = &mm->holes_addr.rb_node; - while (*link) { + while (rb) { u64 hole_start; - node = rb_hole_addr_to_node(*link); + node = rb_hole_addr_to_node(rb); hole_start = __drm_mm_hole_node_start(node); if (addr < hole_start) - link = &node->rb_hole_addr.rb_left; + rb = node->rb_hole_addr.rb_left; else if (addr > hole_start + node->hole_size) - link = &node->rb_hole_addr.rb_right; + rb = node->rb_hole_addr.rb_right; else break; } @@ -326,9 +353,6 @@ first_hole(struct drm_mm *mm, u64 start, u64 end, u64 size, enum drm_mm_insert_mode mode) { - if (RB_EMPTY_ROOT(&mm->holes_size)) - return NULL; - switch (mode) { default: case DRM_MM_INSERT_BEST: @@ -355,7 +379,7 @@ next_hole(struct drm_mm *mm, switch (mode) { default: case DRM_MM_INSERT_BEST: - return rb_hole_size_to_node(rb_next(&node->rb_hole_size)); + return rb_hole_size_to_node(rb_prev(&node->rb_hole_size)); case DRM_MM_INSERT_LOW: return rb_hole_addr_to_node(rb_next(&node->rb_hole_addr)); @@ -426,6 +450,11 @@ int drm_mm_reserve_node(struct drm_mm *mm, struct drm_mm_node *node) } EXPORT_SYMBOL(drm_mm_reserve_node); +static u64 rb_to_hole_size_or_zero(struct rb_node *rb) +{ + return rb ? rb_to_hole_size(rb) : 0; +} + /** * drm_mm_insert_node_in_range - ranged search for space and insert @node * @mm: drm_mm to allocate from @@ -457,6 +486,9 @@ int drm_mm_insert_node_in_range(struct drm_mm * const mm, if (unlikely(size == 0 || range_end - range_start < size)) return -ENOSPC; + if (rb_to_hole_size_or_zero(rb_first_cached(&mm->holes_size)) < size) + return -ENOSPC; + if (alignment <= 1) alignment = 0; @@ -587,9 +619,9 @@ void drm_mm_replace_node(struct drm_mm_node *old, struct drm_mm_node *new) if (drm_mm_hole_follows(old)) { list_replace(&old->hole_stack, &new->hole_stack); - rb_replace_node(&old->rb_hole_size, - &new->rb_hole_size, - &mm->holes_size); + rb_replace_node_cached(&old->rb_hole_size, + &new->rb_hole_size, + &mm->holes_size); rb_replace_node(&old->rb_hole_addr, &new->rb_hole_addr, &mm->holes_addr); @@ -885,7 +917,7 @@ void drm_mm_init(struct drm_mm *mm, u64 start, u64 size) INIT_LIST_HEAD(&mm->hole_stack); mm->interval_tree = RB_ROOT_CACHED; - mm->holes_size = RB_ROOT; + mm->holes_size = RB_ROOT_CACHED; mm->holes_addr = RB_ROOT; /* Clever trick to avoid a special case in the free hole tracking. */ diff --git a/include/drm/drm_mm.h b/include/drm/drm_mm.h index 101f566ae43d..e3aa3bfd4860 100644 --- a/include/drm/drm_mm.h +++ b/include/drm/drm_mm.h @@ -173,7 +173,7 @@ struct drm_mm { struct drm_mm_node head_node; /* Keep an interval_tree for fast lookup of drm_mm_nodes by address. */ struct rb_root_cached interval_tree; - struct rb_root holes_size; + struct rb_root_cached holes_size; struct rb_root holes_addr; unsigned long scan_active; -- cgit v1.2.3 From 83bc4ec37210b17bd611a58968b2ce0e9cc7f251 Mon Sep 17 00:00:00 2001 From: Chris Wilson Date: Mon, 21 May 2018 09:21:29 +0100 Subject: drm/mm: Add a search-by-address variant to only inspect a single hole Searching for an available hole by address is slow, as there no guarantee that a hole will be available and so we must walk over all nodes in the rbtree before we determine the search was futile. In many cases, the caller doesn't strictly care for the highest available hole and was just opportunistically laying out the address space in a preferred order. In such cases, the caller can accept any address and would rather do so then do a slow walk. To be able to mix search strategies, the caller wants to tell the drm_mm how long to spend on the search. Without a good guide for what should be the best split, start with a request to try once at most. That is return the top-most (or lowest) hole if it fulfils the alignment and size requirements. v2: Documentation, by why of example (selftests) and kerneldoc. Signed-off-by: Chris Wilson Cc: Joonas Lahtinen Reviewed-by: Joonas Lahtinen Link: https://patchwork.freedesktop.org/patch/msgid/20180521082131.13744-2-chris@chris-wilson.co.uk --- drivers/gpu/drm/drm_mm.c | 9 +++- drivers/gpu/drm/selftests/drm_mm_selftests.h | 2 + drivers/gpu/drm/selftests/test-drm_mm.c | 71 ++++++++++++++++++++++++++++ include/drm/drm_mm.h | 32 +++++++++++++ 4 files changed, 112 insertions(+), 2 deletions(-) (limited to 'include') diff --git a/drivers/gpu/drm/drm_mm.c b/drivers/gpu/drm/drm_mm.c index 7b4ad05fe1c0..3cc5fbd78ee2 100644 --- a/drivers/gpu/drm/drm_mm.c +++ b/drivers/gpu/drm/drm_mm.c @@ -480,6 +480,7 @@ int drm_mm_insert_node_in_range(struct drm_mm * const mm, { struct drm_mm_node *hole; u64 remainder_mask; + bool once; DRM_MM_BUG_ON(range_start >= range_end); @@ -492,9 +493,13 @@ int drm_mm_insert_node_in_range(struct drm_mm * const mm, if (alignment <= 1) alignment = 0; + once = mode & DRM_MM_INSERT_ONCE; + mode &= ~DRM_MM_INSERT_ONCE; + remainder_mask = is_power_of_2(alignment) ? alignment - 1 : 0; - for (hole = first_hole(mm, range_start, range_end, size, mode); hole; - hole = next_hole(mm, hole, mode)) { + for (hole = first_hole(mm, range_start, range_end, size, mode); + hole; + hole = once ? NULL : next_hole(mm, hole, mode)) { u64 hole_start = __drm_mm_hole_node_start(hole); u64 hole_end = hole_start + hole->hole_size; u64 adj_start, adj_end; diff --git a/drivers/gpu/drm/selftests/drm_mm_selftests.h b/drivers/gpu/drm/selftests/drm_mm_selftests.h index 54acc117550c..6b943ea1c57d 100644 --- a/drivers/gpu/drm/selftests/drm_mm_selftests.h +++ b/drivers/gpu/drm/selftests/drm_mm_selftests.h @@ -19,7 +19,9 @@ selftest(align64, igt_align64) selftest(evict, igt_evict) selftest(evict_range, igt_evict_range) selftest(bottomup, igt_bottomup) +selftest(lowest, igt_lowest) selftest(topdown, igt_topdown) +selftest(highest, igt_highest) selftest(color, igt_color) selftest(color_evict, igt_color_evict) selftest(color_evict_range, igt_color_evict_range) diff --git a/drivers/gpu/drm/selftests/test-drm_mm.c b/drivers/gpu/drm/selftests/test-drm_mm.c index 7cc935d7b7aa..f69d8da222b0 100644 --- a/drivers/gpu/drm/selftests/test-drm_mm.c +++ b/drivers/gpu/drm/selftests/test-drm_mm.c @@ -1825,6 +1825,77 @@ err: return ret; } +static int __igt_once(unsigned int mode) +{ + struct drm_mm mm; + struct drm_mm_node rsvd_lo, rsvd_hi, node; + int err; + + drm_mm_init(&mm, 0, 7); + + memset(&rsvd_lo, 0, sizeof(rsvd_lo)); + rsvd_lo.start = 1; + rsvd_lo.size = 1; + err = drm_mm_reserve_node(&mm, &rsvd_lo); + if (err) { + pr_err("Could not reserve low node\n"); + goto err; + } + + memset(&rsvd_hi, 0, sizeof(rsvd_hi)); + rsvd_hi.start = 5; + rsvd_hi.size = 1; + err = drm_mm_reserve_node(&mm, &rsvd_hi); + if (err) { + pr_err("Could not reserve low node\n"); + goto err_lo; + } + + if (!drm_mm_hole_follows(&rsvd_lo) || !drm_mm_hole_follows(&rsvd_hi)) { + pr_err("Expected a hole after lo and high nodes!\n"); + err = -EINVAL; + goto err_hi; + } + + memset(&node, 0, sizeof(node)); + err = drm_mm_insert_node_generic(&mm, &node, + 2, 0, 0, + mode | DRM_MM_INSERT_ONCE); + if (!err) { + pr_err("Unexpectedly inserted the node into the wrong hole: node.start=%llx\n", + node.start); + err = -EINVAL; + goto err_node; + } + + err = drm_mm_insert_node_generic(&mm, &node, 2, 0, 0, mode); + if (err) { + pr_err("Could not insert the node into the available hole!\n"); + err = -EINVAL; + goto err_hi; + } + +err_node: + drm_mm_remove_node(&node); +err_hi: + drm_mm_remove_node(&rsvd_hi); +err_lo: + drm_mm_remove_node(&rsvd_lo); +err: + drm_mm_takedown(&mm); + return err; +} + +static int igt_lowest(void *ignored) +{ + return __igt_once(DRM_MM_INSERT_LOW); +} + +static int igt_highest(void *ignored) +{ + return __igt_once(DRM_MM_INSERT_HIGH); +} + static void separate_adjacent_colors(const struct drm_mm_node *node, unsigned long color, u64 *start, diff --git a/include/drm/drm_mm.h b/include/drm/drm_mm.h index e3aa3bfd4860..2c3bbb43c7d1 100644 --- a/include/drm/drm_mm.h +++ b/include/drm/drm_mm.h @@ -109,6 +109,38 @@ enum drm_mm_insert_mode { * Allocates the node from the bottom of the found hole. */ DRM_MM_INSERT_EVICT, + + /** + * @DRM_MM_INSERT_ONCE: + * + * Only check the first hole for suitablity and report -ENOSPC + * immediately otherwise, rather than check every hole until a + * suitable one is found. Can only be used in conjunction with another + * search method such as DRM_MM_INSERT_HIGH or DRM_MM_INSERT_LOW. + */ + DRM_MM_INSERT_ONCE = BIT(31), + + /** + * @DRM_MM_INSERT_HIGHEST: + * + * Only check the highest hole (the hole with the largest address) and + * insert the node at the top of the hole or report -ENOSPC if + * unsuitable. + * + * Does not search all holes. + */ + DRM_MM_INSERT_HIGHEST = DRM_MM_INSERT_HIGH | DRM_MM_INSERT_ONCE, + + /** + * @DRM_MM_INSERT_LOWEST: + * + * Only check the lowest hole (the hole with the smallest address) and + * insert the node at the bottom of the hole or report -ENOSPC if + * unsuitable. + * + * Does not search all holes. + */ + DRM_MM_INSERT_LOWEST = DRM_MM_INSERT_LOW | DRM_MM_INSERT_ONCE, }; /** -- cgit v1.2.3 From 8fb756dfa273bcb42bdaff65baae83548b6c326d Mon Sep 17 00:00:00 2001 From: Eric Anholt Date: Fri, 16 Mar 2018 15:04:33 -0700 Subject: drm: Trust format_mod_supported() when it OKs a plane modifier. MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit For parameterized modifiers (Broadcom's SAND and UIF), we need to allow the parameter fields to be filled in, while exposing only the variant of the modifier with the parameter unfilled in the internal arrays and the format blob. Signed-off-by: Eric Anholt Cc: Ville Syrjälä Link: https://patchwork.freedesktop.org/patch/msgid/20180316220435.31416-1-eric@anholt.net Reviewed-by: Ville Syrjälä --- drivers/gpu/drm/drm_plane.c | 23 ++++++++++++----------- include/drm/drm_plane.h | 5 ++++- 2 files changed, 16 insertions(+), 12 deletions(-) (limited to 'include') diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c index 035054455301..7ce88dff871d 100644 --- a/drivers/gpu/drm/drm_plane.c +++ b/drivers/gpu/drm/drm_plane.c @@ -561,19 +561,20 @@ int drm_plane_check_pixel_format(struct drm_plane *plane, if (i == plane->format_count) return -EINVAL; - if (!plane->modifier_count) - return 0; + if (plane->funcs->format_mod_supported) { + if (!plane->funcs->format_mod_supported(plane, format, modifier)) + return -EINVAL; + } else { + if (!plane->modifier_count) + return 0; - for (i = 0; i < plane->modifier_count; i++) { - if (modifier == plane->modifiers[i]) - break; + for (i = 0; i < plane->modifier_count; i++) { + if (modifier == plane->modifiers[i]) + break; + } + if (i == plane->modifier_count) + return -EINVAL; } - if (i == plane->modifier_count) - return -EINVAL; - - if (plane->funcs->format_mod_supported && - !plane->funcs->format_mod_supported(plane, format, modifier)) - return -EINVAL; return 0; } diff --git a/include/drm/drm_plane.h b/include/drm/drm_plane.h index 26fa50c2a50e..14b1607aba4b 100644 --- a/include/drm/drm_plane.h +++ b/include/drm/drm_plane.h @@ -431,7 +431,10 @@ struct drm_plane_funcs { * This optional hook is used for the DRM to determine if the given * format/modifier combination is valid for the plane. This allows the * DRM to generate the correct format bitmask (which formats apply to - * which modifier). + * which modifier), and to valdiate modifiers at atomic_check time. + * + * If not present, then any modifier in the plane's modifier + * list is allowed with any of the plane's formats. * * Returns: * -- cgit v1.2.3 From e065a8dd30af703b4794dc740c0825ee12b92efd Mon Sep 17 00:00:00 2001 From: Dave Stevenson Date: Fri, 16 Mar 2018 15:04:35 -0700 Subject: drm/vc4: Add support for SAND modifier. This is the format generated by VC4's H.264 engine, and preferred by the ISP as well. By displaying SAND buffers directly, we can avoid needing to use the ISP to rewrite the SAND H.264 output to linear before display. This is a joint effort by Dave Stevenson (who wrote the initial patch and DRM demo) and Eric Anholt (drm_fourcc.h generalization, safety checks, RGBA support). v2: Make the parameter macro give all of the middle 48 bits (suggested by Daniels). Fix fourcc_mod_broadcom_mod()'s bits/shift being swapped. Mark NV12/21 as supported, not YUV420. Signed-off-by: Dave Stevenson Signed-off-by: Eric Anholt Cc: Daniel Vetter Acked-by: Daniel Stone (v1) Cc: Boris Brezillon Cc: Maxime Ripard Link: https://patchwork.freedesktop.org/patch/msgid/20180316220435.31416-3-eric@anholt.net --- drivers/gpu/drm/vc4/vc4_plane.c | 84 +++++++++++++++++++++++++++++++++++++---- drivers/gpu/drm/vc4/vc4_regs.h | 6 +++ include/uapi/drm/drm_fourcc.h | 59 +++++++++++++++++++++++++++++ 3 files changed, 142 insertions(+), 7 deletions(-) (limited to 'include') diff --git a/drivers/gpu/drm/vc4/vc4_plane.c b/drivers/gpu/drm/vc4/vc4_plane.c index 6efd55bae8db..2575bd81a010 100644 --- a/drivers/gpu/drm/vc4/vc4_plane.c +++ b/drivers/gpu/drm/vc4/vc4_plane.c @@ -467,12 +467,14 @@ static int vc4_plane_mode_set(struct drm_plane *plane, struct drm_framebuffer *fb = state->fb; u32 ctl0_offset = vc4_state->dlist_count; const struct hvs_format *format = vc4_get_hvs_format(fb->format->format); + u64 base_format_mod = fourcc_mod_broadcom_mod(fb->modifier); int num_planes = drm_format_num_planes(format->drm); bool mix_plane_alpha; bool covers_screen; u32 scl0, scl1, pitch0; u32 lbm_size, tiling; unsigned long irqflags; + u32 hvs_format = format->hvs; int ret, i; ret = vc4_plane_setup_clipping_and_scaling(state); @@ -512,7 +514,7 @@ static int vc4_plane_mode_set(struct drm_plane *plane, scl1 = vc4_get_scl_field(state, 0); } - switch (fb->modifier) { + switch (base_format_mod) { case DRM_FORMAT_MOD_LINEAR: tiling = SCALER_CTL0_TILING_LINEAR; pitch0 = VC4_SET_FIELD(fb->pitches[0], SCALER_SRC_PITCH); @@ -535,6 +537,49 @@ static int vc4_plane_mode_set(struct drm_plane *plane, break; } + case DRM_FORMAT_MOD_BROADCOM_SAND64: + case DRM_FORMAT_MOD_BROADCOM_SAND128: + case DRM_FORMAT_MOD_BROADCOM_SAND256: { + uint32_t param = fourcc_mod_broadcom_param(fb->modifier); + + /* Column-based NV12 or RGBA. + */ + if (fb->format->num_planes > 1) { + if (hvs_format != HVS_PIXEL_FORMAT_YCBCR_YUV420_2PLANE) { + DRM_DEBUG_KMS("SAND format only valid for NV12/21"); + return -EINVAL; + } + hvs_format = HVS_PIXEL_FORMAT_H264; + } else { + if (base_format_mod == DRM_FORMAT_MOD_BROADCOM_SAND256) { + DRM_DEBUG_KMS("SAND256 format only valid for H.264"); + return -EINVAL; + } + } + + switch (base_format_mod) { + case DRM_FORMAT_MOD_BROADCOM_SAND64: + tiling = SCALER_CTL0_TILING_64B; + break; + case DRM_FORMAT_MOD_BROADCOM_SAND128: + tiling = SCALER_CTL0_TILING_128B; + break; + case DRM_FORMAT_MOD_BROADCOM_SAND256: + tiling = SCALER_CTL0_TILING_256B_OR_T; + break; + default: + break; + } + + if (param > SCALER_TILE_HEIGHT_MASK) { + DRM_DEBUG_KMS("SAND height too large (%d)\n", param); + return -EINVAL; + } + + pitch0 = VC4_SET_FIELD(param, SCALER_TILE_HEIGHT); + break; + } + default: DRM_DEBUG_KMS("Unsupported FB tiling flag 0x%16llx", (long long)fb->modifier); @@ -546,7 +591,7 @@ static int vc4_plane_mode_set(struct drm_plane *plane, SCALER_CTL0_VALID | VC4_SET_FIELD(SCALER_CTL0_RGBA_EXPAND_ROUND, SCALER_CTL0_RGBA_EXPAND) | (format->pixel_order << SCALER_CTL0_ORDER_SHIFT) | - (format->hvs << SCALER_CTL0_PIXEL_FORMAT_SHIFT) | + (hvs_format << SCALER_CTL0_PIXEL_FORMAT_SHIFT) | VC4_SET_FIELD(tiling, SCALER_CTL0_TILING) | (vc4_state->is_unity ? SCALER_CTL0_UNITY : 0) | VC4_SET_FIELD(scl0, SCALER_CTL0_SCL0) | @@ -608,8 +653,13 @@ static int vc4_plane_mode_set(struct drm_plane *plane, /* Pitch word 1/2 */ for (i = 1; i < num_planes; i++) { - vc4_dlist_write(vc4_state, - VC4_SET_FIELD(fb->pitches[i], SCALER_SRC_PITCH)); + if (hvs_format != HVS_PIXEL_FORMAT_H264) { + vc4_dlist_write(vc4_state, + VC4_SET_FIELD(fb->pitches[i], + SCALER_SRC_PITCH)); + } else { + vc4_dlist_write(vc4_state, pitch0); + } } /* Colorspace conversion words */ @@ -867,13 +917,30 @@ static bool vc4_format_mod_supported(struct drm_plane *plane, case DRM_FORMAT_BGR565: case DRM_FORMAT_ARGB1555: case DRM_FORMAT_XRGB1555: - return true; + switch (fourcc_mod_broadcom_mod(modifier)) { + case DRM_FORMAT_MOD_LINEAR: + case DRM_FORMAT_MOD_BROADCOM_VC4_T_TILED: + case DRM_FORMAT_MOD_BROADCOM_SAND64: + case DRM_FORMAT_MOD_BROADCOM_SAND128: + return true; + default: + return false; + } + case DRM_FORMAT_NV12: + case DRM_FORMAT_NV21: + switch (fourcc_mod_broadcom_mod(modifier)) { + case DRM_FORMAT_MOD_LINEAR: + case DRM_FORMAT_MOD_BROADCOM_SAND64: + case DRM_FORMAT_MOD_BROADCOM_SAND128: + case DRM_FORMAT_MOD_BROADCOM_SAND256: + return true; + default: + return false; + } case DRM_FORMAT_YUV422: case DRM_FORMAT_YVU422: case DRM_FORMAT_YUV420: case DRM_FORMAT_YVU420: - case DRM_FORMAT_NV12: - case DRM_FORMAT_NV21: case DRM_FORMAT_NV16: case DRM_FORMAT_NV61: default: @@ -903,6 +970,9 @@ struct drm_plane *vc4_plane_init(struct drm_device *dev, unsigned i; static const uint64_t modifiers[] = { DRM_FORMAT_MOD_BROADCOM_VC4_T_TILED, + DRM_FORMAT_MOD_BROADCOM_SAND128, + DRM_FORMAT_MOD_BROADCOM_SAND64, + DRM_FORMAT_MOD_BROADCOM_SAND256, DRM_FORMAT_MOD_LINEAR, DRM_FORMAT_MOD_INVALID }; diff --git a/drivers/gpu/drm/vc4/vc4_regs.h b/drivers/gpu/drm/vc4/vc4_regs.h index d1fb6fec46eb..d6864fa4bd14 100644 --- a/drivers/gpu/drm/vc4/vc4_regs.h +++ b/drivers/gpu/drm/vc4/vc4_regs.h @@ -1031,6 +1031,12 @@ enum hvs_pixel_format { #define SCALER_SRC_PITCH_MASK VC4_MASK(15, 0) #define SCALER_SRC_PITCH_SHIFT 0 +/* PITCH0/1/2 fields for tiled (SAND). */ +#define SCALER_TILE_SKIP_0_MASK VC4_MASK(18, 16) +#define SCALER_TILE_SKIP_0_SHIFT 16 +#define SCALER_TILE_HEIGHT_MASK VC4_MASK(15, 0) +#define SCALER_TILE_HEIGHT_SHIFT 0 + /* PITCH0 fields for T-tiled. */ #define SCALER_PITCH0_TILE_WIDTH_L_MASK VC4_MASK(22, 16) #define SCALER_PITCH0_TILE_WIDTH_L_SHIFT 16 diff --git a/include/uapi/drm/drm_fourcc.h b/include/uapi/drm/drm_fourcc.h index e04613d30a13..64bf67abff7e 100644 --- a/include/uapi/drm/drm_fourcc.h +++ b/include/uapi/drm/drm_fourcc.h @@ -384,6 +384,23 @@ extern "C" { #define DRM_FORMAT_MOD_NVIDIA_16BX2_BLOCK_THIRTYTWO_GOB \ fourcc_mod_code(NVIDIA, 0x15) +/* + * Some Broadcom modifiers take parameters, for example the number of + * vertical lines in the image. Reserve the lower 32 bits for modifier + * type, and the next 24 bits for parameters. Top 8 bits are the + * vendor code. + */ +#define __fourcc_mod_broadcom_param_shift 8 +#define __fourcc_mod_broadcom_param_bits 48 +#define fourcc_mod_broadcom_code(val, params) \ + fourcc_mod_code(BROADCOM, ((((__u64)params) << __fourcc_mod_broadcom_param_shift) | val)) +#define fourcc_mod_broadcom_param(m) \ + ((int)(((m) >> __fourcc_mod_broadcom_param_shift) & \ + ((1ULL << __fourcc_mod_broadcom_param_bits) - 1))) +#define fourcc_mod_broadcom_mod(m) \ + ((m) & ~(((1ULL << __fourcc_mod_broadcom_param_bits) - 1) << \ + __fourcc_mod_broadcom_param_shift)) + /* * Broadcom VC4 "T" format * @@ -405,6 +422,48 @@ extern "C" { */ #define DRM_FORMAT_MOD_BROADCOM_VC4_T_TILED fourcc_mod_code(BROADCOM, 1) +/* + * Broadcom SAND format + * + * This is the native format that the H.264 codec block uses. For VC4 + * HVS, it is only valid for H.264 (NV12/21) and RGBA modes. + * + * The image can be considered to be split into columns, and the + * columns are placed consecutively into memory. The width of those + * columns can be either 32, 64, 128, or 256 pixels, but in practice + * only 128 pixel columns are used. + * + * The pitch between the start of each column is set to optimally + * switch between SDRAM banks. This is passed as the number of lines + * of column width in the modifier (we can't use the stride value due + * to various core checks that look at it , so you should set the + * stride to width*cpp). + * + * Note that the column height for this format modifier is the same + * for all of the planes, assuming that each column contains both Y + * and UV. Some SAND-using hardware stores UV in a separate tiled + * image from Y to reduce the column height, which is not supported + * with these modifiers. + */ + +#define DRM_FORMAT_MOD_BROADCOM_SAND32_COL_HEIGHT(v) \ + fourcc_mod_broadcom_code(2, v) +#define DRM_FORMAT_MOD_BROADCOM_SAND64_COL_HEIGHT(v) \ + fourcc_mod_broadcom_code(3, v) +#define DRM_FORMAT_MOD_BROADCOM_SAND128_COL_HEIGHT(v) \ + fourcc_mod_broadcom_code(4, v) +#define DRM_FORMAT_MOD_BROADCOM_SAND256_COL_HEIGHT(v) \ + fourcc_mod_broadcom_code(5, v) + +#define DRM_FORMAT_MOD_BROADCOM_SAND32 \ + DRM_FORMAT_MOD_BROADCOM_SAND32_COL_HEIGHT(0) +#define DRM_FORMAT_MOD_BROADCOM_SAND64 \ + DRM_FORMAT_MOD_BROADCOM_SAND64_COL_HEIGHT(0) +#define DRM_FORMAT_MOD_BROADCOM_SAND128 \ + DRM_FORMAT_MOD_BROADCOM_SAND128_COL_HEIGHT(0) +#define DRM_FORMAT_MOD_BROADCOM_SAND256 \ + DRM_FORMAT_MOD_BROADCOM_SAND256_COL_HEIGHT(0) + #if defined(__cplusplus) } #endif -- cgit v1.2.3 From 09ea0dfbf972c63dfea8cf46f2fb67f39e4d833b Mon Sep 17 00:00:00 2001 From: Gerd Hoffmann Date: Tue, 29 May 2018 15:59:18 +0200 Subject: dma-buf: make map_atomic and map function pointers optional So drivers don't need dummy functions just returning NULL. Cc: Daniel Vetter Signed-off-by: Gerd Hoffmann Reviewed-by: Daniel Vetter Reviewed-by: Oleksandr Andrushchenko Link: http://patchwork.freedesktop.org/patch/msgid/20180529135918.19729-1-kraxel@redhat.com --- drivers/dma-buf/dma-buf.c | 4 ++++ include/linux/dma-buf.h | 4 ++-- 2 files changed, 6 insertions(+), 2 deletions(-) (limited to 'include') diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c index d78d5fc173dc..4c45e31258f0 100644 --- a/drivers/dma-buf/dma-buf.c +++ b/drivers/dma-buf/dma-buf.c @@ -872,6 +872,8 @@ void *dma_buf_kmap_atomic(struct dma_buf *dmabuf, unsigned long page_num) { WARN_ON(!dmabuf); + if (!dmabuf->ops->map_atomic) + return NULL; return dmabuf->ops->map_atomic(dmabuf, page_num); } EXPORT_SYMBOL_GPL(dma_buf_kmap_atomic); @@ -907,6 +909,8 @@ void *dma_buf_kmap(struct dma_buf *dmabuf, unsigned long page_num) { WARN_ON(!dmabuf); + if (!dmabuf->ops->map) + return NULL; return dmabuf->ops->map(dmabuf, page_num); } EXPORT_SYMBOL_GPL(dma_buf_kmap); diff --git a/include/linux/dma-buf.h b/include/linux/dma-buf.h index 085db2fee2d7..88917fa796e4 100644 --- a/include/linux/dma-buf.h +++ b/include/linux/dma-buf.h @@ -39,12 +39,12 @@ struct dma_buf_attachment; /** * struct dma_buf_ops - operations possible on struct dma_buf - * @map_atomic: maps a page from the buffer into kernel address + * @map_atomic: [optional] maps a page from the buffer into kernel address * space, users may not block until the subsequent unmap call. * This callback must not sleep. * @unmap_atomic: [optional] unmaps a atomically mapped page from the buffer. * This Callback must not sleep. - * @map: maps a page from the buffer into kernel address space. + * @map: [optional] maps a page from the buffer into kernel address space. * @unmap: [optional] unmaps a page from the buffer. * @vmap: [optional] creates a virtual mapping for the buffer into kernel * address space. Same restrictions as for vmap and friends apply. -- cgit v1.2.3 From e00fb8564ee98c5c3a72c74b1a27e441abff6cca Mon Sep 17 00:00:00 2001 From: Ville Syrjälä Date: Fri, 25 May 2018 21:50:45 +0300 Subject: drm: Stop updating plane->crtc/fb/old_fb on atomic drivers MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Stop playing around with plane->crtc/fb/old_fb with atomic drivers. Make life a lot simpler when we don't have to do the magic old_fb vs. fb dance around plane updates. That way we can't risk plane->fb getting out of sync with plane->state->fb and we're less likely to leak any refcounts as well. Signed-off-by: Ville Syrjälä Reviewed-by: Maarten Lankhorst Acked-by: Harry Wentland Link: https://patchwork.freedesktop.org/patch/msgid/20180525185045.29689-14-ville.syrjala@linux.intel.com Reviewed-by: Sinclair Yeh --- drivers/gpu/drm/drm_atomic.c | 55 ++++--------------------------------- drivers/gpu/drm/drm_atomic_helper.c | 15 +--------- drivers/gpu/drm/drm_crtc.c | 8 ++++-- drivers/gpu/drm/drm_fb_helper.c | 7 ----- drivers/gpu/drm/drm_framebuffer.c | 5 ---- drivers/gpu/drm/drm_plane.c | 14 ++++++---- drivers/gpu/drm/drm_plane_helper.c | 4 ++- include/drm/drm_atomic.h | 3 -- 8 files changed, 24 insertions(+), 87 deletions(-) (limited to 'include') diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c index 07fef42869aa..11059d556dbd 100644 --- a/drivers/gpu/drm/drm_atomic.c +++ b/drivers/gpu/drm/drm_atomic.c @@ -692,6 +692,11 @@ drm_atomic_get_plane_state(struct drm_atomic_state *state, WARN_ON(!state->acquire_ctx); + /* the legacy pointers should never be set */ + WARN_ON(plane->fb); + WARN_ON(plane->old_fb); + WARN_ON(plane->crtc); + plane_state = drm_atomic_get_existing_plane_state(state, plane); if (plane_state) return plane_state; @@ -2039,45 +2044,6 @@ int drm_atomic_set_property(struct drm_atomic_state *state, return ret; } -/** - * drm_atomic_clean_old_fb -- Unset old_fb pointers and set plane->fb pointers. - * - * @dev: drm device to check. - * @plane_mask: plane mask for planes that were updated. - * @ret: return value, can be -EDEADLK for a retry. - * - * Before doing an update &drm_plane.old_fb is set to &drm_plane.fb, but before - * dropping the locks old_fb needs to be set to NULL and plane->fb updated. This - * is a common operation for each atomic update, so this call is split off as a - * helper. - */ -void drm_atomic_clean_old_fb(struct drm_device *dev, - unsigned plane_mask, - int ret) -{ - struct drm_plane *plane; - - /* if succeeded, fixup legacy plane crtc/fb ptrs before dropping - * locks (ie. while it is still safe to deref plane->state). We - * need to do this here because the driver entry points cannot - * distinguish between legacy and atomic ioctls. - */ - drm_for_each_plane_mask(plane, dev, plane_mask) { - if (ret == 0) { - struct drm_framebuffer *new_fb = plane->state->fb; - if (new_fb) - drm_framebuffer_get(new_fb); - plane->fb = new_fb; - plane->crtc = plane->state->crtc; - - if (plane->old_fb) - drm_framebuffer_put(plane->old_fb); - } - plane->old_fb = NULL; - } -} -EXPORT_SYMBOL(drm_atomic_clean_old_fb); - /** * DOC: explicit fencing properties * @@ -2298,9 +2264,7 @@ int drm_mode_atomic_ioctl(struct drm_device *dev, unsigned int copied_objs, copied_props; struct drm_atomic_state *state; struct drm_modeset_acquire_ctx ctx; - struct drm_plane *plane; struct drm_out_fence_state *fence_state; - unsigned plane_mask; int ret = 0; unsigned int i, j, num_fences; @@ -2340,7 +2304,6 @@ int drm_mode_atomic_ioctl(struct drm_device *dev, state->allow_modeset = !!(arg->flags & DRM_MODE_ATOMIC_ALLOW_MODESET); retry: - plane_mask = 0; copied_objs = 0; copied_props = 0; fence_state = NULL; @@ -2411,12 +2374,6 @@ retry: copied_props++; } - if (obj->type == DRM_MODE_OBJECT_PLANE && count_props && - !(arg->flags & DRM_MODE_ATOMIC_TEST_ONLY)) { - plane = obj_to_plane(obj); - plane_mask |= (1 << drm_plane_index(plane)); - plane->old_fb = plane->fb; - } drm_mode_object_put(obj); } @@ -2437,8 +2394,6 @@ retry: } out: - drm_atomic_clean_old_fb(dev, plane_mask, ret); - complete_crtc_signaling(dev, state, fence_state, num_fences, !ret); if (ret == -EDEADLK) { diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c index 130da5195f3b..232fa11a5e31 100644 --- a/drivers/gpu/drm/drm_atomic_helper.c +++ b/drivers/gpu/drm/drm_atomic_helper.c @@ -2914,7 +2914,6 @@ static int __drm_atomic_helper_disable_all(struct drm_device *dev, struct drm_plane *plane; struct drm_crtc_state *crtc_state; struct drm_crtc *crtc; - unsigned plane_mask = 0; int ret, i; state = drm_atomic_state_alloc(dev); @@ -2957,17 +2956,10 @@ static int __drm_atomic_helper_disable_all(struct drm_device *dev, goto free; drm_atomic_set_fb_for_plane(plane_state, NULL); - - if (clean_old_fbs) { - plane->old_fb = plane->fb; - plane_mask |= BIT(drm_plane_index(plane)); - } } ret = drm_atomic_commit(state); free: - if (plane_mask) - drm_atomic_clean_old_fb(dev, plane_mask, ret); drm_atomic_state_put(state); return ret; } @@ -3129,13 +3121,8 @@ int drm_atomic_helper_commit_duplicated_state(struct drm_atomic_state *state, state->acquire_ctx = ctx; - for_each_new_plane_in_state(state, plane, new_plane_state, i) { - WARN_ON(plane->crtc != new_plane_state->crtc); - WARN_ON(plane->fb != new_plane_state->fb); - WARN_ON(plane->old_fb); - + for_each_new_plane_in_state(state, plane, new_plane_state, i) state->planes[i].old_state = plane->state; - } for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) state->crtcs[i].old_state = crtc->state; diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index 237bd34212db..53828fc8d911 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -479,8 +479,12 @@ static int __drm_mode_set_config_internal(struct drm_mode_set *set, ret = crtc->funcs->set_config(set, ctx); if (ret == 0) { - crtc->primary->crtc = fb ? crtc : NULL; - crtc->primary->fb = fb; + struct drm_plane *plane = crtc->primary; + + if (!plane->state) { + plane->crtc = fb ? crtc : NULL; + plane->fb = fb; + } } drm_for_each_crtc(tmp, crtc->dev) { diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index 91f051e5e130..cab14f253384 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -368,7 +368,6 @@ static int restore_fbdev_mode_atomic(struct drm_fb_helper *fb_helper, bool activ struct drm_plane *plane; struct drm_atomic_state *state; int i, ret; - unsigned int plane_mask; struct drm_modeset_acquire_ctx ctx; drm_modeset_acquire_init(&ctx, 0); @@ -381,7 +380,6 @@ static int restore_fbdev_mode_atomic(struct drm_fb_helper *fb_helper, bool activ state->acquire_ctx = &ctx; retry: - plane_mask = 0; drm_for_each_plane(plane, dev) { plane_state = drm_atomic_get_plane_state(state, plane); if (IS_ERR(plane_state)) { @@ -391,9 +389,6 @@ retry: plane_state->rotation = DRM_MODE_ROTATE_0; - plane->old_fb = plane->fb; - plane_mask |= 1 << drm_plane_index(plane); - /* disable non-primary: */ if (plane->type == DRM_PLANE_TYPE_PRIMARY) continue; @@ -430,8 +425,6 @@ retry: ret = drm_atomic_commit(state); out_state: - drm_atomic_clean_old_fb(dev, plane_mask, ret); - if (ret == -EDEADLK) goto backoff; diff --git a/drivers/gpu/drm/drm_framebuffer.c b/drivers/gpu/drm/drm_framebuffer.c index bfedceff87bb..46b11e46edbd 100644 --- a/drivers/gpu/drm/drm_framebuffer.c +++ b/drivers/gpu/drm/drm_framebuffer.c @@ -836,8 +836,6 @@ retry: goto unlock; plane_mask |= BIT(drm_plane_index(plane)); - - plane->old_fb = plane->fb; } /* This list is only filled when disable_crtcs is set. */ @@ -852,9 +850,6 @@ retry: ret = drm_atomic_commit(state); unlock: - if (plane_mask) - drm_atomic_clean_old_fb(dev, plane_mask, ret); - if (ret == -EDEADLK) { drm_atomic_state_clear(state); drm_modeset_backoff(&ctx); diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c index 7ce88dff871d..534b57933576 100644 --- a/drivers/gpu/drm/drm_plane.c +++ b/drivers/gpu/drm/drm_plane.c @@ -651,9 +651,11 @@ static int __setplane_internal(struct drm_plane *plane, crtc_x, crtc_y, crtc_w, crtc_h, src_x, src_y, src_w, src_h, ctx); if (!ret) { - plane->crtc = crtc; - plane->fb = fb; - drm_framebuffer_get(plane->fb); + if (!plane->state) { + plane->crtc = crtc; + plane->fb = fb; + drm_framebuffer_get(plane->fb); + } } else { plane->old_fb = NULL; } @@ -1093,8 +1095,10 @@ retry: /* Keep the old fb, don't unref it. */ plane->old_fb = NULL; } else { - plane->fb = fb; - drm_framebuffer_get(fb); + if (!plane->state) { + plane->fb = fb; + drm_framebuffer_get(fb); + } } out: diff --git a/drivers/gpu/drm/drm_plane_helper.c b/drivers/gpu/drm/drm_plane_helper.c index f88f68161519..2010794943bc 100644 --- a/drivers/gpu/drm/drm_plane_helper.c +++ b/drivers/gpu/drm/drm_plane_helper.c @@ -502,6 +502,7 @@ EXPORT_SYMBOL(drm_plane_helper_update); int drm_plane_helper_disable(struct drm_plane *plane) { struct drm_plane_state *plane_state; + struct drm_framebuffer *old_fb; /* crtc helpers love to call disable functions for already disabled hw * functions. So cope with that. */ @@ -521,8 +522,9 @@ int drm_plane_helper_disable(struct drm_plane *plane) plane_state->plane = plane; plane_state->crtc = NULL; + old_fb = plane_state->fb; drm_atomic_set_fb_for_plane(plane_state, NULL); - return drm_plane_helper_commit(plane, plane_state, plane->fb); + return drm_plane_helper_commit(plane, plane_state, old_fb); } EXPORT_SYMBOL(drm_plane_helper_disable); diff --git a/include/drm/drm_atomic.h b/include/drm/drm_atomic.h index a57a8aa90ffb..ca461b6cf71f 100644 --- a/include/drm/drm_atomic.h +++ b/include/drm/drm_atomic.h @@ -601,9 +601,6 @@ int __must_check drm_atomic_add_affected_planes(struct drm_atomic_state *state, struct drm_crtc *crtc); -void -drm_atomic_clean_old_fb(struct drm_device *dev, unsigned plane_mask, int ret); - int __must_check drm_atomic_check_only(struct drm_atomic_state *state); int __must_check drm_atomic_commit(struct drm_atomic_state *state); int __must_check drm_atomic_nonblocking_commit(struct drm_atomic_state *state); -- cgit v1.2.3 From ba1f665f161ce112a2703649317bfdc9b6521613 Mon Sep 17 00:00:00 2001 From: Haneen Mohammed Date: Fri, 25 May 2018 04:25:55 +0300 Subject: drm: Add checks for atomic_[duplicate/destroy]_state with atomic drivers This patch add checks for atomic_[duplicate/destroy]_state of drm_[connector/crtc/plane]_funcs for atomic drivers in the relevant drm_*_init functions since these callback are mandatory for atomic drivers. Update the kerneldoc comments for those callbacks. Signed-off-by: Haneen Mohammed Reviewed-by: Sean Paul Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20180525012555.GA8448@haneen-vb --- drivers/gpu/drm/drm_connector.c | 4 ++++ drivers/gpu/drm/drm_crtc.c | 4 ++++ drivers/gpu/drm/drm_plane.c | 4 ++++ include/drm/drm_connector.h | 4 ++++ include/drm/drm_crtc.h | 4 ++++ include/drm/drm_plane.h | 4 ++++ 6 files changed, 24 insertions(+) (limited to 'include') diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c index 002b244391f9..549b89501e01 100644 --- a/drivers/gpu/drm/drm_connector.c +++ b/drivers/gpu/drm/drm_connector.c @@ -195,6 +195,10 @@ int drm_connector_init(struct drm_device *dev, struct ida *connector_ida = &drm_connector_enum_list[connector_type].ida; + WARN_ON(drm_drv_uses_atomic_modeset(dev) && + (!funcs->atomic_destroy_state || + !funcs->atomic_duplicate_state)); + ret = __drm_mode_object_add(dev, &connector->base, DRM_MODE_OBJECT_CONNECTOR, false, drm_connector_free); diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c index 163d82ac7d76..f45e7a8d4acd 100644 --- a/drivers/gpu/drm/drm_crtc.c +++ b/drivers/gpu/drm/drm_crtc.c @@ -286,6 +286,10 @@ int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc, if (WARN_ON(config->num_crtc >= 32)) return -EINVAL; + WARN_ON(drm_drv_uses_atomic_modeset(dev) && + (!funcs->atomic_destroy_state || + !funcs->atomic_duplicate_state)); + crtc->dev = dev; crtc->funcs = funcs; diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c index 534b57933576..df0b4ebbedbf 100644 --- a/drivers/gpu/drm/drm_plane.c +++ b/drivers/gpu/drm/drm_plane.c @@ -177,6 +177,10 @@ int drm_universal_plane_init(struct drm_device *dev, struct drm_plane *plane, if (WARN_ON(config->num_total_plane >= 32)) return -EINVAL; + WARN_ON(drm_drv_uses_atomic_modeset(dev) && + (!funcs->atomic_destroy_state || + !funcs->atomic_duplicate_state)); + ret = drm_mode_object_add(dev, &plane->base, DRM_MODE_OBJECT_PLANE); if (ret) return ret; diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index ee4c48218c85..c5797c24edd3 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -616,6 +616,8 @@ struct drm_connector_funcs { * cleaned up by calling the @atomic_destroy_state hook in this * structure. * + * This callback is mandatory for atomic drivers. + * * Atomic drivers which don't subclass &struct drm_connector_state should use * drm_atomic_helper_connector_duplicate_state(). Drivers that subclass the * state structure to extend it with driver-private state should use @@ -642,6 +644,8 @@ struct drm_connector_funcs { * * Destroy a state duplicated with @atomic_duplicate_state and release * or unreference all resources it references + * + * This callback is mandatory for atomic drivers. */ void (*atomic_destroy_state)(struct drm_connector *connector, struct drm_connector_state *state); diff --git a/include/drm/drm_crtc.h b/include/drm/drm_crtc.h index 5cf7adeae6a5..23eddbccab10 100644 --- a/include/drm/drm_crtc.h +++ b/include/drm/drm_crtc.h @@ -506,6 +506,8 @@ struct drm_crtc_funcs { * cleaned up by calling the @atomic_destroy_state hook in this * structure. * + * This callback is mandatory for atomic drivers. + * * Atomic drivers which don't subclass &struct drm_crtc_state should use * drm_atomic_helper_crtc_duplicate_state(). Drivers that subclass the * state structure to extend it with driver-private state should use @@ -532,6 +534,8 @@ struct drm_crtc_funcs { * * Destroy a state duplicated with @atomic_duplicate_state and release * or unreference all resources it references + * + * This callback is mandatory for atomic drivers. */ void (*atomic_destroy_state)(struct drm_crtc *crtc, struct drm_crtc_state *state); diff --git a/include/drm/drm_plane.h b/include/drm/drm_plane.h index 14b1607aba4b..7d4d6c7f0afd 100644 --- a/include/drm/drm_plane.h +++ b/include/drm/drm_plane.h @@ -288,6 +288,8 @@ struct drm_plane_funcs { * cleaned up by calling the @atomic_destroy_state hook in this * structure. * + * This callback is mandatory for atomic drivers. + * * Atomic drivers which don't subclass &struct drm_plane_state should use * drm_atomic_helper_plane_duplicate_state(). Drivers that subclass the * state structure to extend it with driver-private state should use @@ -314,6 +316,8 @@ struct drm_plane_funcs { * * Destroy a state duplicated with @atomic_duplicate_state and release * or unreference all resources it references + * + * This callback is mandatory for atomic drivers. */ void (*atomic_destroy_state)(struct drm_plane *plane, struct drm_plane_state *state); -- cgit v1.2.3 From a19741e5e5a9f1f02f8e3c037bde7d73d4bfae9c Mon Sep 17 00:00:00 2001 From: Christian König Date: Mon, 28 May 2018 11:47:52 +0200 Subject: dma_buf: remove device parameter from attach callback v2 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The device parameter is completely unused because it is available in the attachment structure as well. v2: fix kerneldoc as well Signed-off-by: Christian König Reviewed-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/226643/ --- drivers/dma-buf/dma-buf.c | 2 +- drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c | 3 +-- drivers/gpu/drm/drm_prime.c | 3 +-- drivers/gpu/drm/udl/udl_dmabuf.c | 1 - drivers/gpu/drm/vmwgfx/vmwgfx_prime.c | 1 - drivers/media/common/videobuf2/videobuf2-dma-contig.c | 2 +- drivers/media/common/videobuf2/videobuf2-dma-sg.c | 2 +- drivers/media/common/videobuf2/videobuf2-vmalloc.c | 2 +- include/drm/drm_prime.h | 2 +- include/linux/dma-buf.h | 13 ++++++------- 10 files changed, 13 insertions(+), 18 deletions(-) (limited to 'include') diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c index 4c45e31258f0..50771063c617 100644 --- a/drivers/dma-buf/dma-buf.c +++ b/drivers/dma-buf/dma-buf.c @@ -568,7 +568,7 @@ struct dma_buf_attachment *dma_buf_attach(struct dma_buf *dmabuf, mutex_lock(&dmabuf->lock); if (dmabuf->ops->attach) { - ret = dmabuf->ops->attach(dmabuf, dev, attach); + ret = dmabuf->ops->attach(dmabuf, attach); if (ret) goto err_attach; } diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c index 4b584cb75bf4..bbbb4f9578db 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c @@ -127,7 +127,6 @@ error: } static int amdgpu_gem_map_attach(struct dma_buf *dma_buf, - struct device *target_dev, struct dma_buf_attachment *attach) { struct drm_gem_object *obj = dma_buf->priv; @@ -135,7 +134,7 @@ static int amdgpu_gem_map_attach(struct dma_buf *dma_buf, struct amdgpu_device *adev = amdgpu_ttm_adev(bo->tbo.bdev); long r; - r = drm_gem_map_attach(dma_buf, target_dev, attach); + r = drm_gem_map_attach(dma_buf, attach); if (r) return r; diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c index 397b46b33739..0055d919070c 100644 --- a/drivers/gpu/drm/drm_prime.c +++ b/drivers/gpu/drm/drm_prime.c @@ -186,7 +186,6 @@ static int drm_prime_lookup_buf_handle(struct drm_prime_file_private *prime_fpri /** * drm_gem_map_attach - dma_buf attach implementation for GEM * @dma_buf: buffer to attach device to - * @target_dev: not used * @attach: buffer attachment data * * Allocates &drm_prime_attachment and calls &drm_driver.gem_prime_pin for @@ -195,7 +194,7 @@ static int drm_prime_lookup_buf_handle(struct drm_prime_file_private *prime_fpri * * Returns 0 on success, negative error code on failure. */ -int drm_gem_map_attach(struct dma_buf *dma_buf, struct device *target_dev, +int drm_gem_map_attach(struct dma_buf *dma_buf, struct dma_buf_attachment *attach) { struct drm_prime_attachment *prime_attach; diff --git a/drivers/gpu/drm/udl/udl_dmabuf.c b/drivers/gpu/drm/udl/udl_dmabuf.c index 0a20695eb120..91ae60309d3e 100644 --- a/drivers/gpu/drm/udl/udl_dmabuf.c +++ b/drivers/gpu/drm/udl/udl_dmabuf.c @@ -29,7 +29,6 @@ struct udl_drm_dmabuf_attachment { }; static int udl_attach_dma_buf(struct dma_buf *dmabuf, - struct device *dev, struct dma_buf_attachment *attach) { struct udl_drm_dmabuf_attachment *udl_attach; diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_prime.c b/drivers/gpu/drm/vmwgfx/vmwgfx_prime.c index 0d42a46521fc..fbffb37ccf42 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_prime.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_prime.c @@ -40,7 +40,6 @@ */ static int vmw_prime_map_attach(struct dma_buf *dma_buf, - struct device *target_dev, struct dma_buf_attachment *attach) { return -ENOSYS; diff --git a/drivers/media/common/videobuf2/videobuf2-dma-contig.c b/drivers/media/common/videobuf2/videobuf2-dma-contig.c index f1178f6f434d..12d0072c52c2 100644 --- a/drivers/media/common/videobuf2/videobuf2-dma-contig.c +++ b/drivers/media/common/videobuf2/videobuf2-dma-contig.c @@ -222,7 +222,7 @@ struct vb2_dc_attachment { enum dma_data_direction dma_dir; }; -static int vb2_dc_dmabuf_ops_attach(struct dma_buf *dbuf, struct device *dev, +static int vb2_dc_dmabuf_ops_attach(struct dma_buf *dbuf, struct dma_buf_attachment *dbuf_attach) { struct vb2_dc_attachment *attach; diff --git a/drivers/media/common/videobuf2/videobuf2-dma-sg.c b/drivers/media/common/videobuf2/videobuf2-dma-sg.c index 753ed3138dcc..cf94765e593f 100644 --- a/drivers/media/common/videobuf2/videobuf2-dma-sg.c +++ b/drivers/media/common/videobuf2/videobuf2-dma-sg.c @@ -371,7 +371,7 @@ struct vb2_dma_sg_attachment { enum dma_data_direction dma_dir; }; -static int vb2_dma_sg_dmabuf_ops_attach(struct dma_buf *dbuf, struct device *dev, +static int vb2_dma_sg_dmabuf_ops_attach(struct dma_buf *dbuf, struct dma_buf_attachment *dbuf_attach) { struct vb2_dma_sg_attachment *attach; diff --git a/drivers/media/common/videobuf2/videobuf2-vmalloc.c b/drivers/media/common/videobuf2/videobuf2-vmalloc.c index 359fb9804d16..cdec023a918d 100644 --- a/drivers/media/common/videobuf2/videobuf2-vmalloc.c +++ b/drivers/media/common/videobuf2/videobuf2-vmalloc.c @@ -209,7 +209,7 @@ struct vb2_vmalloc_attachment { enum dma_data_direction dma_dir; }; -static int vb2_vmalloc_dmabuf_ops_attach(struct dma_buf *dbuf, struct device *dev, +static int vb2_vmalloc_dmabuf_ops_attach(struct dma_buf *dbuf, struct dma_buf_attachment *dbuf_attach) { struct vb2_vmalloc_attachment *attach; diff --git a/include/drm/drm_prime.h b/include/drm/drm_prime.h index 4d5f5d6cf6a6..ef338151cea8 100644 --- a/include/drm/drm_prime.h +++ b/include/drm/drm_prime.h @@ -82,7 +82,7 @@ int drm_gem_prime_fd_to_handle(struct drm_device *dev, struct dma_buf *drm_gem_dmabuf_export(struct drm_device *dev, struct dma_buf_export_info *exp_info); void drm_gem_dmabuf_release(struct dma_buf *dma_buf); -int drm_gem_map_attach(struct dma_buf *dma_buf, struct device *target_dev, +int drm_gem_map_attach(struct dma_buf *dma_buf, struct dma_buf_attachment *attach); void drm_gem_map_detach(struct dma_buf *dma_buf, struct dma_buf_attachment *attach); diff --git a/include/linux/dma-buf.h b/include/linux/dma-buf.h index 88917fa796e4..c0ad5bf61188 100644 --- a/include/linux/dma-buf.h +++ b/include/linux/dma-buf.h @@ -55,11 +55,11 @@ struct dma_buf_ops { * @attach: * * This is called from dma_buf_attach() to make sure that a given - * &device can access the provided &dma_buf. Exporters which support - * buffer objects in special locations like VRAM or device-specific - * carveout areas should check whether the buffer could be move to - * system memory (or directly accessed by the provided device), and - * otherwise need to fail the attach operation. + * &dma_buf_attachment.dev can access the provided &dma_buf. Exporters + * which support buffer objects in special locations like VRAM or + * device-specific carveout areas should check whether the buffer could + * be move to system memory (or directly accessed by the provided + * device), and otherwise need to fail the attach operation. * * The exporter should also in general check whether the current * allocation fullfills the DMA constraints of the new device. If this @@ -77,8 +77,7 @@ struct dma_buf_ops { * to signal that backing storage is already allocated and incompatible * with the requirements of requesting device. */ - int (*attach)(struct dma_buf *, struct device *, - struct dma_buf_attachment *); + int (*attach)(struct dma_buf *, struct dma_buf_attachment *); /** * @detach: -- cgit v1.2.3 From f664a52695429b68afb4e130a0f69cd5fd1fec86 Mon Sep 17 00:00:00 2001 From: Christian König Date: Mon, 28 May 2018 13:34:01 +0200 Subject: dma-buf: remove kmap_atomic interface MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Neither used nor correctly implemented anywhere. Just completely remove the interface. Signed-off-by: Christian König Reviewed-by: Daniel Vetter Acked-by: Sumit Semwal Link: https://patchwork.freedesktop.org/patch/226645/ --- drivers/dma-buf/dma-buf.c | 54 +--------------------- drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c | 2 - drivers/gpu/drm/armada/armada_gem.c | 2 - drivers/gpu/drm/drm_prime.c | 31 ------------- drivers/gpu/drm/i915/i915_gem_dmabuf.c | 11 ----- drivers/gpu/drm/i915/selftests/mock_dmabuf.c | 2 - drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c | 2 - drivers/gpu/drm/tegra/gem.c | 14 ------ drivers/gpu/drm/udl/udl_dmabuf.c | 17 ------- drivers/gpu/drm/vmwgfx/vmwgfx_prime.c | 13 ------ .../media/common/videobuf2/videobuf2-dma-contig.c | 1 - drivers/media/common/videobuf2/videobuf2-dma-sg.c | 1 - drivers/media/common/videobuf2/videobuf2-vmalloc.c | 1 - drivers/staging/android/ion/ion.c | 2 - drivers/tee/tee_shm.c | 6 --- include/drm/drm_prime.h | 4 -- include/linux/dma-buf.h | 4 -- 17 files changed, 2 insertions(+), 165 deletions(-) (limited to 'include') diff --git a/drivers/dma-buf/dma-buf.c b/drivers/dma-buf/dma-buf.c index 50771063c617..13884474d158 100644 --- a/drivers/dma-buf/dma-buf.c +++ b/drivers/dma-buf/dma-buf.c @@ -405,7 +405,6 @@ struct dma_buf *dma_buf_export(const struct dma_buf_export_info *exp_info) || !exp_info->ops->map_dma_buf || !exp_info->ops->unmap_dma_buf || !exp_info->ops->release - || !exp_info->ops->map_atomic || !exp_info->ops->map || !exp_info->ops->mmap)) { return ERR_PTR(-EINVAL); @@ -687,26 +686,14 @@ EXPORT_SYMBOL_GPL(dma_buf_unmap_attachment); * void \*dma_buf_kmap(struct dma_buf \*, unsigned long); * void dma_buf_kunmap(struct dma_buf \*, unsigned long, void \*); * - * There are also atomic variants of these interfaces. Like for kmap they - * facilitate non-blocking fast-paths. Neither the importer nor the exporter - * (in the callback) is allowed to block when using these. - * - * Interfaces:: - * void \*dma_buf_kmap_atomic(struct dma_buf \*, unsigned long); - * void dma_buf_kunmap_atomic(struct dma_buf \*, unsigned long, void \*); - * - * For importers all the restrictions of using kmap apply, like the limited - * supply of kmap_atomic slots. Hence an importer shall only hold onto at - * max 2 atomic dma_buf kmaps at the same time (in any given process context). + * Implementing the functions is optional for exporters and for importers all + * the restrictions of using kmap apply. * * dma_buf kmap calls outside of the range specified in begin_cpu_access are * undefined. If the range is not PAGE_SIZE aligned, kmap needs to succeed on * the partial chunks at the beginning and end but may return stale or bogus * data outside of the range (in these partial chunks). * - * Note that these calls need to always succeed. The exporter needs to - * complete any preparations that might fail in begin_cpu_access. - * * For some cases the overhead of kmap can be too high, a vmap interface * is introduced. This interface should be used very carefully, as vmalloc * space is a limited resources on many architectures. @@ -859,43 +846,6 @@ int dma_buf_end_cpu_access(struct dma_buf *dmabuf, } EXPORT_SYMBOL_GPL(dma_buf_end_cpu_access); -/** - * dma_buf_kmap_atomic - Map a page of the buffer object into kernel address - * space. The same restrictions as for kmap_atomic and friends apply. - * @dmabuf: [in] buffer to map page from. - * @page_num: [in] page in PAGE_SIZE units to map. - * - * This call must always succeed, any necessary preparations that might fail - * need to be done in begin_cpu_access. - */ -void *dma_buf_kmap_atomic(struct dma_buf *dmabuf, unsigned long page_num) -{ - WARN_ON(!dmabuf); - - if (!dmabuf->ops->map_atomic) - return NULL; - return dmabuf->ops->map_atomic(dmabuf, page_num); -} -EXPORT_SYMBOL_GPL(dma_buf_kmap_atomic); - -/** - * dma_buf_kunmap_atomic - Unmap a page obtained by dma_buf_kmap_atomic. - * @dmabuf: [in] buffer to unmap page from. - * @page_num: [in] page in PAGE_SIZE units to unmap. - * @vaddr: [in] kernel space pointer obtained from dma_buf_kmap_atomic. - * - * This call must always succeed. - */ -void dma_buf_kunmap_atomic(struct dma_buf *dmabuf, unsigned long page_num, - void *vaddr) -{ - WARN_ON(!dmabuf); - - if (dmabuf->ops->unmap_atomic) - dmabuf->ops->unmap_atomic(dmabuf, page_num, vaddr); -} -EXPORT_SYMBOL_GPL(dma_buf_kunmap_atomic); - /** * dma_buf_kmap - Map a page of the buffer object into kernel address space. The * same restrictions as for kmap and friends apply. diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c index bbbb4f9578db..0558da049827 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_prime.c @@ -238,9 +238,7 @@ static const struct dma_buf_ops amdgpu_dmabuf_ops = { .release = drm_gem_dmabuf_release, .begin_cpu_access = amdgpu_gem_begin_cpu_access, .map = drm_gem_dmabuf_kmap, - .map_atomic = drm_gem_dmabuf_kmap_atomic, .unmap = drm_gem_dmabuf_kunmap, - .unmap_atomic = drm_gem_dmabuf_kunmap_atomic, .mmap = drm_gem_dmabuf_mmap, .vmap = drm_gem_dmabuf_vmap, .vunmap = drm_gem_dmabuf_vunmap, diff --git a/drivers/gpu/drm/armada/armada_gem.c b/drivers/gpu/drm/armada/armada_gem.c index a97f509743a5..3fb37c75c065 100644 --- a/drivers/gpu/drm/armada/armada_gem.c +++ b/drivers/gpu/drm/armada/armada_gem.c @@ -490,8 +490,6 @@ static const struct dma_buf_ops armada_gem_prime_dmabuf_ops = { .map_dma_buf = armada_gem_prime_map_dma_buf, .unmap_dma_buf = armada_gem_prime_unmap_dma_buf, .release = drm_gem_dmabuf_release, - .map_atomic = armada_gem_dmabuf_no_kmap, - .unmap_atomic = armada_gem_dmabuf_no_kunmap, .map = armada_gem_dmabuf_no_kmap, .unmap = armada_gem_dmabuf_no_kunmap, .mmap = armada_gem_dmabuf_mmap, diff --git a/drivers/gpu/drm/drm_prime.c b/drivers/gpu/drm/drm_prime.c index 0055d919070c..186db2e4c57a 100644 --- a/drivers/gpu/drm/drm_prime.c +++ b/drivers/gpu/drm/drm_prime.c @@ -433,35 +433,6 @@ void drm_gem_dmabuf_vunmap(struct dma_buf *dma_buf, void *vaddr) } EXPORT_SYMBOL(drm_gem_dmabuf_vunmap); -/** - * drm_gem_dmabuf_kmap_atomic - map_atomic implementation for GEM - * @dma_buf: buffer to be mapped - * @page_num: page number within the buffer - * - * Not implemented. This can be used as the &dma_buf_ops.map_atomic callback. - */ -void *drm_gem_dmabuf_kmap_atomic(struct dma_buf *dma_buf, - unsigned long page_num) -{ - return NULL; -} -EXPORT_SYMBOL(drm_gem_dmabuf_kmap_atomic); - -/** - * drm_gem_dmabuf_kunmap_atomic - unmap_atomic implementation for GEM - * @dma_buf: buffer to be unmapped - * @page_num: page number within the buffer - * @addr: virtual address of the buffer - * - * Not implemented. This can be used as the &dma_buf_ops.unmap_atomic callback. - */ -void drm_gem_dmabuf_kunmap_atomic(struct dma_buf *dma_buf, - unsigned long page_num, void *addr) -{ - -} -EXPORT_SYMBOL(drm_gem_dmabuf_kunmap_atomic); - /** * drm_gem_dmabuf_kmap - map implementation for GEM * @dma_buf: buffer to be mapped @@ -519,9 +490,7 @@ static const struct dma_buf_ops drm_gem_prime_dmabuf_ops = { .unmap_dma_buf = drm_gem_unmap_dma_buf, .release = drm_gem_dmabuf_release, .map = drm_gem_dmabuf_kmap, - .map_atomic = drm_gem_dmabuf_kmap_atomic, .unmap = drm_gem_dmabuf_kunmap, - .unmap_atomic = drm_gem_dmabuf_kunmap_atomic, .mmap = drm_gem_dmabuf_mmap, .vmap = drm_gem_dmabuf_vmap, .vunmap = drm_gem_dmabuf_vunmap, diff --git a/drivers/gpu/drm/i915/i915_gem_dmabuf.c b/drivers/gpu/drm/i915/i915_gem_dmabuf.c index 69a7aec49e84..82e2ca17a441 100644 --- a/drivers/gpu/drm/i915/i915_gem_dmabuf.c +++ b/drivers/gpu/drm/i915/i915_gem_dmabuf.c @@ -111,15 +111,6 @@ static void i915_gem_dmabuf_vunmap(struct dma_buf *dma_buf, void *vaddr) i915_gem_object_unpin_map(obj); } -static void *i915_gem_dmabuf_kmap_atomic(struct dma_buf *dma_buf, unsigned long page_num) -{ - return NULL; -} - -static void i915_gem_dmabuf_kunmap_atomic(struct dma_buf *dma_buf, unsigned long page_num, void *addr) -{ - -} static void *i915_gem_dmabuf_kmap(struct dma_buf *dma_buf, unsigned long page_num) { struct drm_i915_gem_object *obj = dma_buf_to_obj(dma_buf); @@ -225,9 +216,7 @@ static const struct dma_buf_ops i915_dmabuf_ops = { .unmap_dma_buf = i915_gem_unmap_dma_buf, .release = drm_gem_dmabuf_release, .map = i915_gem_dmabuf_kmap, - .map_atomic = i915_gem_dmabuf_kmap_atomic, .unmap = i915_gem_dmabuf_kunmap, - .unmap_atomic = i915_gem_dmabuf_kunmap_atomic, .mmap = i915_gem_dmabuf_mmap, .vmap = i915_gem_dmabuf_vmap, .vunmap = i915_gem_dmabuf_vunmap, diff --git a/drivers/gpu/drm/i915/selftests/mock_dmabuf.c b/drivers/gpu/drm/i915/selftests/mock_dmabuf.c index 302f7d103635..f81fda8ea45e 100644 --- a/drivers/gpu/drm/i915/selftests/mock_dmabuf.c +++ b/drivers/gpu/drm/i915/selftests/mock_dmabuf.c @@ -130,9 +130,7 @@ static const struct dma_buf_ops mock_dmabuf_ops = { .unmap_dma_buf = mock_unmap_dma_buf, .release = mock_dmabuf_release, .map = mock_dmabuf_kmap, - .map_atomic = mock_dmabuf_kmap_atomic, .unmap = mock_dmabuf_kunmap, - .unmap_atomic = mock_dmabuf_kunmap_atomic, .mmap = mock_dmabuf_mmap, .vmap = mock_dmabuf_vmap, .vunmap = mock_dmabuf_vunmap, diff --git a/drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c b/drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c index 8e41d649e248..1a073f9b2834 100644 --- a/drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c +++ b/drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c @@ -148,8 +148,6 @@ static const struct dma_buf_ops omap_dmabuf_ops = { .release = drm_gem_dmabuf_release, .begin_cpu_access = omap_gem_dmabuf_begin_cpu_access, .end_cpu_access = omap_gem_dmabuf_end_cpu_access, - .map_atomic = omap_gem_dmabuf_kmap_atomic, - .unmap_atomic = omap_gem_dmabuf_kunmap_atomic, .map = omap_gem_dmabuf_kmap, .unmap = omap_gem_dmabuf_kunmap, .mmap = omap_gem_dmabuf_mmap, diff --git a/drivers/gpu/drm/tegra/gem.c b/drivers/gpu/drm/tegra/gem.c index 8b0b4ff64bb4..d7661702c11c 100644 --- a/drivers/gpu/drm/tegra/gem.c +++ b/drivers/gpu/drm/tegra/gem.c @@ -596,18 +596,6 @@ static int tegra_gem_prime_end_cpu_access(struct dma_buf *buf, return 0; } -static void *tegra_gem_prime_kmap_atomic(struct dma_buf *buf, - unsigned long page) -{ - return NULL; -} - -static void tegra_gem_prime_kunmap_atomic(struct dma_buf *buf, - unsigned long page, - void *addr) -{ -} - static void *tegra_gem_prime_kmap(struct dma_buf *buf, unsigned long page) { return NULL; @@ -648,8 +636,6 @@ static const struct dma_buf_ops tegra_gem_prime_dmabuf_ops = { .release = tegra_gem_prime_release, .begin_cpu_access = tegra_gem_prime_begin_cpu_access, .end_cpu_access = tegra_gem_prime_end_cpu_access, - .map_atomic = tegra_gem_prime_kmap_atomic, - .unmap_atomic = tegra_gem_prime_kunmap_atomic, .map = tegra_gem_prime_kmap, .unmap = tegra_gem_prime_kunmap, .mmap = tegra_gem_prime_mmap, diff --git a/drivers/gpu/drm/udl/udl_dmabuf.c b/drivers/gpu/drm/udl/udl_dmabuf.c index 91ae60309d3e..556f62662aa9 100644 --- a/drivers/gpu/drm/udl/udl_dmabuf.c +++ b/drivers/gpu/drm/udl/udl_dmabuf.c @@ -157,27 +157,12 @@ static void *udl_dmabuf_kmap(struct dma_buf *dma_buf, unsigned long page_num) return NULL; } -static void *udl_dmabuf_kmap_atomic(struct dma_buf *dma_buf, - unsigned long page_num) -{ - /* TODO */ - - return NULL; -} - static void udl_dmabuf_kunmap(struct dma_buf *dma_buf, unsigned long page_num, void *addr) { /* TODO */ } -static void udl_dmabuf_kunmap_atomic(struct dma_buf *dma_buf, - unsigned long page_num, - void *addr) -{ - /* TODO */ -} - static int udl_dmabuf_mmap(struct dma_buf *dma_buf, struct vm_area_struct *vma) { @@ -192,9 +177,7 @@ static const struct dma_buf_ops udl_dmabuf_ops = { .map_dma_buf = udl_map_dma_buf, .unmap_dma_buf = udl_unmap_dma_buf, .map = udl_dmabuf_kmap, - .map_atomic = udl_dmabuf_kmap_atomic, .unmap = udl_dmabuf_kunmap, - .unmap_atomic = udl_dmabuf_kunmap_atomic, .mmap = udl_dmabuf_mmap, .release = drm_gem_dmabuf_release, }; diff --git a/drivers/gpu/drm/vmwgfx/vmwgfx_prime.c b/drivers/gpu/drm/vmwgfx/vmwgfx_prime.c index fbffb37ccf42..373bc6da2f84 100644 --- a/drivers/gpu/drm/vmwgfx/vmwgfx_prime.c +++ b/drivers/gpu/drm/vmwgfx/vmwgfx_prime.c @@ -71,17 +71,6 @@ static void vmw_prime_dmabuf_vunmap(struct dma_buf *dma_buf, void *vaddr) { } -static void *vmw_prime_dmabuf_kmap_atomic(struct dma_buf *dma_buf, - unsigned long page_num) -{ - return NULL; -} - -static void vmw_prime_dmabuf_kunmap_atomic(struct dma_buf *dma_buf, - unsigned long page_num, void *addr) -{ - -} static void *vmw_prime_dmabuf_kmap(struct dma_buf *dma_buf, unsigned long page_num) { @@ -108,9 +97,7 @@ const struct dma_buf_ops vmw_prime_dmabuf_ops = { .unmap_dma_buf = vmw_prime_unmap_dma_buf, .release = NULL, .map = vmw_prime_dmabuf_kmap, - .map_atomic = vmw_prime_dmabuf_kmap_atomic, .unmap = vmw_prime_dmabuf_kunmap, - .unmap_atomic = vmw_prime_dmabuf_kunmap_atomic, .mmap = vmw_prime_dmabuf_mmap, .vmap = vmw_prime_dmabuf_vmap, .vunmap = vmw_prime_dmabuf_vunmap, diff --git a/drivers/media/common/videobuf2/videobuf2-dma-contig.c b/drivers/media/common/videobuf2/videobuf2-dma-contig.c index 12d0072c52c2..aff0ab7bf83d 100644 --- a/drivers/media/common/videobuf2/videobuf2-dma-contig.c +++ b/drivers/media/common/videobuf2/videobuf2-dma-contig.c @@ -358,7 +358,6 @@ static const struct dma_buf_ops vb2_dc_dmabuf_ops = { .map_dma_buf = vb2_dc_dmabuf_ops_map, .unmap_dma_buf = vb2_dc_dmabuf_ops_unmap, .map = vb2_dc_dmabuf_ops_kmap, - .map_atomic = vb2_dc_dmabuf_ops_kmap, .vmap = vb2_dc_dmabuf_ops_vmap, .mmap = vb2_dc_dmabuf_ops_mmap, .release = vb2_dc_dmabuf_ops_release, diff --git a/drivers/media/common/videobuf2/videobuf2-dma-sg.c b/drivers/media/common/videobuf2/videobuf2-dma-sg.c index cf94765e593f..015e737095cd 100644 --- a/drivers/media/common/videobuf2/videobuf2-dma-sg.c +++ b/drivers/media/common/videobuf2/videobuf2-dma-sg.c @@ -507,7 +507,6 @@ static const struct dma_buf_ops vb2_dma_sg_dmabuf_ops = { .map_dma_buf = vb2_dma_sg_dmabuf_ops_map, .unmap_dma_buf = vb2_dma_sg_dmabuf_ops_unmap, .map = vb2_dma_sg_dmabuf_ops_kmap, - .map_atomic = vb2_dma_sg_dmabuf_ops_kmap, .vmap = vb2_dma_sg_dmabuf_ops_vmap, .mmap = vb2_dma_sg_dmabuf_ops_mmap, .release = vb2_dma_sg_dmabuf_ops_release, diff --git a/drivers/media/common/videobuf2/videobuf2-vmalloc.c b/drivers/media/common/videobuf2/videobuf2-vmalloc.c index cdec023a918d..6dfbd5b05907 100644 --- a/drivers/media/common/videobuf2/videobuf2-vmalloc.c +++ b/drivers/media/common/videobuf2/videobuf2-vmalloc.c @@ -346,7 +346,6 @@ static const struct dma_buf_ops vb2_vmalloc_dmabuf_ops = { .map_dma_buf = vb2_vmalloc_dmabuf_ops_map, .unmap_dma_buf = vb2_vmalloc_dmabuf_ops_unmap, .map = vb2_vmalloc_dmabuf_ops_kmap, - .map_atomic = vb2_vmalloc_dmabuf_ops_kmap, .vmap = vb2_vmalloc_dmabuf_ops_vmap, .mmap = vb2_vmalloc_dmabuf_ops_mmap, .release = vb2_vmalloc_dmabuf_ops_release, diff --git a/drivers/staging/android/ion/ion.c b/drivers/staging/android/ion/ion.c index e74db7902549..a5220445b5e8 100644 --- a/drivers/staging/android/ion/ion.c +++ b/drivers/staging/android/ion/ion.c @@ -369,8 +369,6 @@ static const struct dma_buf_ops dma_buf_ops = { .detach = ion_dma_buf_detatch, .begin_cpu_access = ion_dma_buf_begin_cpu_access, .end_cpu_access = ion_dma_buf_end_cpu_access, - .map_atomic = ion_dma_buf_kmap, - .unmap_atomic = ion_dma_buf_kunmap, .map = ion_dma_buf_kmap, .unmap = ion_dma_buf_kunmap, }; diff --git a/drivers/tee/tee_shm.c b/drivers/tee/tee_shm.c index 556960a1bab3..df4a1553b78b 100644 --- a/drivers/tee/tee_shm.c +++ b/drivers/tee/tee_shm.c @@ -80,11 +80,6 @@ static void tee_shm_op_release(struct dma_buf *dmabuf) tee_shm_release(shm); } -static void *tee_shm_op_map_atomic(struct dma_buf *dmabuf, unsigned long pgnum) -{ - return NULL; -} - static void *tee_shm_op_map(struct dma_buf *dmabuf, unsigned long pgnum) { return NULL; @@ -107,7 +102,6 @@ static const struct dma_buf_ops tee_shm_dma_buf_ops = { .map_dma_buf = tee_shm_op_map_dma_buf, .unmap_dma_buf = tee_shm_op_unmap_dma_buf, .release = tee_shm_op_release, - .map_atomic = tee_shm_op_map_atomic, .map = tee_shm_op_map, .mmap = tee_shm_op_mmap, }; diff --git a/include/drm/drm_prime.h b/include/drm/drm_prime.h index ef338151cea8..d716d653b096 100644 --- a/include/drm/drm_prime.h +++ b/include/drm/drm_prime.h @@ -93,10 +93,6 @@ void drm_gem_unmap_dma_buf(struct dma_buf_attachment *attach, enum dma_data_direction dir); void *drm_gem_dmabuf_vmap(struct dma_buf *dma_buf); void drm_gem_dmabuf_vunmap(struct dma_buf *dma_buf, void *vaddr); -void *drm_gem_dmabuf_kmap_atomic(struct dma_buf *dma_buf, - unsigned long page_num); -void drm_gem_dmabuf_kunmap_atomic(struct dma_buf *dma_buf, - unsigned long page_num, void *addr); void *drm_gem_dmabuf_kmap(struct dma_buf *dma_buf, unsigned long page_num); void drm_gem_dmabuf_kunmap(struct dma_buf *dma_buf, unsigned long page_num, void *addr); diff --git a/include/linux/dma-buf.h b/include/linux/dma-buf.h index c0ad5bf61188..58725f890b5b 100644 --- a/include/linux/dma-buf.h +++ b/include/linux/dma-buf.h @@ -205,8 +205,6 @@ struct dma_buf_ops { * to be restarted. */ int (*end_cpu_access)(struct dma_buf *, enum dma_data_direction); - void *(*map_atomic)(struct dma_buf *, unsigned long); - void (*unmap_atomic)(struct dma_buf *, unsigned long, void *); void *(*map)(struct dma_buf *, unsigned long); void (*unmap)(struct dma_buf *, unsigned long, void *); @@ -394,8 +392,6 @@ int dma_buf_begin_cpu_access(struct dma_buf *dma_buf, enum dma_data_direction dir); int dma_buf_end_cpu_access(struct dma_buf *dma_buf, enum dma_data_direction dir); -void *dma_buf_kmap_atomic(struct dma_buf *, unsigned long); -void dma_buf_kunmap_atomic(struct dma_buf *, unsigned long, void *); void *dma_buf_kmap(struct dma_buf *, unsigned long); void dma_buf_kunmap(struct dma_buf *, unsigned long, void *); -- cgit v1.2.3 From 935774cd71fe604cc8ed24adcb507d7784255672 Mon Sep 17 00:00:00 2001 From: Brian Starkey Date: Wed, 29 Mar 2017 17:42:32 +0100 Subject: drm: Add writeback connector type Writeback connectors represent writeback engines which can write the CRTC output to a memory framebuffer. Add a writeback connector type and related support functions. Drivers should initialize a writeback connector with drm_writeback_connector_init() which takes care of setting up all the writeback-specific details on top of the normal functionality of drm_connector_init(). Writeback connectors have a WRITEBACK_FB_ID property, used to set the output framebuffer, and a WRITEBACK_PIXEL_FORMATS blob used to expose the supported writeback formats to userspace. When a framebuffer is attached to a writeback connector with the WRITEBACK_FB_ID property, it is used only once (for the commit in which it was included), and userspace can never read back the value of WRITEBACK_FB_ID. WRITEBACK_FB_ID can only be set if the connector is attached to a CRTC. Changes since v1: - Added drm_writeback.c + documentation - Added helper to initialize writeback connector in one go - Added core checks - Squashed into a single commit - Dropped the client cap - Writeback framebuffers are no longer persistent Changes since v2: Daniel Vetter: - Subclass drm_connector to drm_writeback_connector - Relax check to allow CRTC to be set without an FB - Add some writeback_ prefixes - Drop PIXEL_FORMATS_SIZE property, as it was unnecessary Gustavo Padovan: - Add drm_writeback_job to handle writeback signalling centrally Changes since v3: - Rebased - Rename PIXEL_FORMATS -> WRITEBACK_PIXEL_FORMATS Chances since v4: - Embed a drm_encoder inside the drm_writeback_connector to reduce the amount of boilerplate code required from the drivers that are using it. Changes since v5: - Added Rob Clark's atomic_commit() vfunc to connector helper funcs, so that writeback jobs are committed from atomic helpers - Updated create_writeback_properties() signature to return an error code rather than a boolean false for failure. - Free writeback job with the connector state rather than when doing the cleanup_work() Changes since v7: - fix extraneous use of out_fence that is only introduced in a subsequent patch. Changes since v8: - whitespace changes pull from subsequent patch Changes since v9: - Revert the v6 changes that free the writeback job in the connector state cleanup and return to doing it in the cleanup_work() function Signed-off-by: Brian Starkey [rebased and fixed conflicts] Signed-off-by: Mihail Atanassov [rebased and added atomic_commit() vfunc for writeback jobs] Signed-off-by: Rob Clark Signed-off-by: Liviu Dudau Reviewed-by: Eric Anholt Link: https://patchwork.freedesktop.org/patch/229037/ --- Documentation/gpu/drm-kms.rst | 9 ++ drivers/gpu/drm/Makefile | 2 +- drivers/gpu/drm/drm_atomic.c | 124 ++++++++++++++++ drivers/gpu/drm/drm_atomic_helper.c | 25 ++++ drivers/gpu/drm/drm_connector.c | 4 +- drivers/gpu/drm/drm_writeback.c | 245 +++++++++++++++++++++++++++++++ include/drm/drm_atomic.h | 3 + include/drm/drm_connector.h | 13 ++ include/drm/drm_mode_config.h | 15 ++ include/drm/drm_modeset_helper_vtables.h | 11 ++ include/drm/drm_writeback.h | 91 ++++++++++++ include/uapi/drm/drm_mode.h | 1 + 12 files changed, 541 insertions(+), 2 deletions(-) create mode 100644 drivers/gpu/drm/drm_writeback.c create mode 100644 include/drm/drm_writeback.h (limited to 'include') diff --git a/Documentation/gpu/drm-kms.rst b/Documentation/gpu/drm-kms.rst index e233c2626bd0..4f6f113a7f5d 100644 --- a/Documentation/gpu/drm-kms.rst +++ b/Documentation/gpu/drm-kms.rst @@ -373,6 +373,15 @@ Connector Functions Reference .. kernel-doc:: drivers/gpu/drm/drm_connector.c :export: +Writeback Connectors +-------------------- + +.. kernel-doc:: drivers/gpu/drm/drm_writeback.c + :doc: overview + +.. kernel-doc:: drivers/gpu/drm/drm_writeback.c + :export: + Encoder Abstraction =================== diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile index ef9f3dab287f..69c13517ea3a 100644 --- a/drivers/gpu/drm/Makefile +++ b/drivers/gpu/drm/Makefile @@ -18,7 +18,7 @@ drm-y := drm_auth.o drm_bufs.o drm_cache.o \ drm_encoder.o drm_mode_object.o drm_property.o \ drm_plane.o drm_color_mgmt.o drm_print.o \ drm_dumb_buffers.o drm_mode_config.o drm_vblank.o \ - drm_syncobj.o drm_lease.o + drm_syncobj.o drm_lease.o drm_writeback.o drm-$(CONFIG_DRM_LIB_RANDOM) += lib/drm_random.o drm-$(CONFIG_DRM_VM) += drm_vm.o diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c index 9ec5c865a043..3e53d6e5c340 100644 --- a/drivers/gpu/drm/drm_atomic.c +++ b/drivers/gpu/drm/drm_atomic.c @@ -30,6 +30,7 @@ #include #include #include +#include #include #include "drm_crtc_internal.h" @@ -690,6 +691,45 @@ static void drm_atomic_crtc_print_state(struct drm_printer *p, crtc->funcs->atomic_print_state(p, state); } +/** + * drm_atomic_connector_check - check connector state + * @connector: connector to check + * @state: connector state to check + * + * Provides core sanity checks for connector state. + * + * RETURNS: + * Zero on success, error code on failure + */ +static int drm_atomic_connector_check(struct drm_connector *connector, + struct drm_connector_state *state) +{ + struct drm_crtc_state *crtc_state; + struct drm_writeback_job *writeback_job = state->writeback_job; + + if ((connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK) || !writeback_job) + return 0; + + if (writeback_job->fb && !state->crtc) { + DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] framebuffer without CRTC\n", + connector->base.id, connector->name); + return -EINVAL; + } + + if (state->crtc) + crtc_state = drm_atomic_get_existing_crtc_state(state->state, + state->crtc); + + if (writeback_job->fb && !crtc_state->active) { + DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] has framebuffer, but [CRTC:%d] is off\n", + connector->base.id, connector->name, + state->crtc->base.id); + return -EINVAL; + } + + return 0; +} + /** * drm_atomic_get_plane_state - get plane state * @state: global atomic state object @@ -1321,6 +1361,12 @@ static int drm_atomic_connector_set_property(struct drm_connector *connector, return -EINVAL; } state->content_protection = val; + } else if (property == config->writeback_fb_id_property) { + struct drm_framebuffer *fb = drm_framebuffer_lookup(dev, NULL, val); + int ret = drm_atomic_set_writeback_fb_for_connector(state, fb); + if (fb) + drm_framebuffer_put(fb); + return ret; } else if (connector->funcs->atomic_set_property) { return connector->funcs->atomic_set_property(connector, state, property, val); @@ -1407,6 +1453,9 @@ drm_atomic_connector_get_property(struct drm_connector *connector, *val = state->scaling_mode; } else if (property == connector->content_protection_property) { *val = state->content_protection; + } else if (property == config->writeback_fb_id_property) { + /* Writeback framebuffer is one-shot, write and forget */ + *val = 0; } else if (connector->funcs->atomic_get_property) { return connector->funcs->atomic_get_property(connector, state, property, val); @@ -1631,6 +1680,70 @@ drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state, } EXPORT_SYMBOL(drm_atomic_set_crtc_for_connector); +/* + * drm_atomic_get_writeback_job - return or allocate a writeback job + * @conn_state: Connector state to get the job for + * + * Writeback jobs have a different lifetime to the atomic state they are + * associated with. This convenience function takes care of allocating a job + * if there isn't yet one associated with the connector state, otherwise + * it just returns the existing job. + * + * Returns: The writeback job for the given connector state + */ +static struct drm_writeback_job * +drm_atomic_get_writeback_job(struct drm_connector_state *conn_state) +{ + WARN_ON(conn_state->connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK); + + if (!conn_state->writeback_job) + conn_state->writeback_job = + kzalloc(sizeof(*conn_state->writeback_job), GFP_KERNEL); + + return conn_state->writeback_job; +} + +/** + * drm_atomic_set_writeback_fb_for_connector - set writeback framebuffer + * @conn_state: atomic state object for the connector + * @fb: fb to use for the connector + * + * This is used to set the framebuffer for a writeback connector, which outputs + * to a buffer instead of an actual physical connector. + * Changing the assigned framebuffer requires us to grab a reference to the new + * fb and drop the reference to the old fb, if there is one. This function + * takes care of all these details besides updating the pointer in the + * state object itself. + * + * Note: The only way conn_state can already have an fb set is if the commit + * sets the property more than once. + * + * See also: drm_writeback_connector_init() + * + * Returns: 0 on success + */ +int drm_atomic_set_writeback_fb_for_connector( + struct drm_connector_state *conn_state, + struct drm_framebuffer *fb) +{ + struct drm_writeback_job *job = + drm_atomic_get_writeback_job(conn_state); + if (!job) + return -ENOMEM; + + drm_framebuffer_assign(&job->fb, fb); + + if (fb) + DRM_DEBUG_ATOMIC("Set [FB:%d] for connector state %p\n", + fb->base.id, conn_state); + else + DRM_DEBUG_ATOMIC("Set [NOFB] for connector state %p\n", + conn_state); + + return 0; +} +EXPORT_SYMBOL(drm_atomic_set_writeback_fb_for_connector); + /** * drm_atomic_add_affected_connectors - add connectors for crtc * @state: atomic state @@ -1752,6 +1865,8 @@ int drm_atomic_check_only(struct drm_atomic_state *state) struct drm_plane_state *plane_state; struct drm_crtc *crtc; struct drm_crtc_state *crtc_state; + struct drm_connector *conn; + struct drm_connector_state *conn_state; int i, ret = 0; DRM_DEBUG_ATOMIC("checking %p\n", state); @@ -1774,6 +1889,15 @@ int drm_atomic_check_only(struct drm_atomic_state *state) } } + for_each_new_connector_in_state(state, conn, conn_state, i) { + ret = drm_atomic_connector_check(conn, conn_state); + if (ret) { + DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] atomic core check failed\n", + conn->base.id, conn->name); + return ret; + } + } + if (config->funcs->atomic_check) ret = config->funcs->atomic_check(state->dev, state); diff --git a/drivers/gpu/drm/drm_atomic_helper.c b/drivers/gpu/drm/drm_atomic_helper.c index 232fa11a5e31..17baf5057132 100644 --- a/drivers/gpu/drm/drm_atomic_helper.c +++ b/drivers/gpu/drm/drm_atomic_helper.c @@ -30,6 +30,7 @@ #include #include #include +#include #include #include "drm_crtc_helper_internal.h" @@ -1172,6 +1173,25 @@ void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev, } EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_disables); +static void drm_atomic_helper_commit_writebacks(struct drm_device *dev, + struct drm_atomic_state *old_state) +{ + struct drm_connector *connector; + struct drm_connector_state *new_conn_state; + int i; + + for_each_new_connector_in_state(old_state, connector, new_conn_state, i) { + const struct drm_connector_helper_funcs *funcs; + + funcs = connector->helper_private; + + if (new_conn_state->writeback_job && new_conn_state->writeback_job->fb) { + WARN_ON(connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK); + funcs->atomic_commit(connector, new_conn_state->writeback_job); + } + } +} + /** * drm_atomic_helper_commit_modeset_enables - modeset commit to enable outputs * @dev: DRM device @@ -1251,6 +1271,8 @@ void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev, drm_bridge_enable(encoder->bridge); } + + drm_atomic_helper_commit_writebacks(dev, old_state); } EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_enables); @@ -3647,6 +3669,9 @@ __drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector, if (state->crtc) drm_connector_get(connector); state->commit = NULL; + + /* Don't copy over a writeback job, they are used only once */ + state->writeback_job = NULL; } EXPORT_SYMBOL(__drm_atomic_helper_connector_duplicate_state); diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c index 549b89501e01..2f9ebddd178e 100644 --- a/drivers/gpu/drm/drm_connector.c +++ b/drivers/gpu/drm/drm_connector.c @@ -87,6 +87,7 @@ static struct drm_conn_prop_enum_list drm_connector_enum_list[] = { { DRM_MODE_CONNECTOR_VIRTUAL, "Virtual" }, { DRM_MODE_CONNECTOR_DSI, "DSI" }, { DRM_MODE_CONNECTOR_DPI, "DPI" }, + { DRM_MODE_CONNECTOR_WRITEBACK, "Writeback" }, }; void drm_connector_ida_init(void) @@ -253,7 +254,8 @@ int drm_connector_init(struct drm_device *dev, config->num_connector++; spin_unlock_irq(&config->connector_list_lock); - if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL) + if (connector_type != DRM_MODE_CONNECTOR_VIRTUAL && + connector_type != DRM_MODE_CONNECTOR_WRITEBACK) drm_object_attach_property(&connector->base, config->edid_property, 0); diff --git a/drivers/gpu/drm/drm_writeback.c b/drivers/gpu/drm/drm_writeback.c new file mode 100644 index 000000000000..e5b8a4b79724 --- /dev/null +++ b/drivers/gpu/drm/drm_writeback.c @@ -0,0 +1,245 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * (C) COPYRIGHT 2016 ARM Limited. All rights reserved. + * Author: Brian Starkey + * + * This program is free software and is provided to you under the terms of the + * GNU General Public License version 2 as published by the Free Software + * Foundation, and any use by you of this program is subject to the terms + * of such GNU licence. + */ + +#include +#include +#include +#include +#include + +/** + * DOC: overview + * + * Writeback connectors are used to expose hardware which can write the output + * from a CRTC to a memory buffer. They are used and act similarly to other + * types of connectors, with some important differences: + * - Writeback connectors don't provide a way to output visually to the user. + * - Writeback connectors should always report as "disconnected" (so that + * clients which don't understand them will ignore them). + * - Writeback connectors don't have EDID. + * + * A framebuffer may only be attached to a writeback connector when the + * connector is attached to a CRTC. The WRITEBACK_FB_ID property which sets the + * framebuffer applies only to a single commit (see below). A framebuffer may + * not be attached while the CRTC is off. + * + * Writeback connectors have some additional properties, which userspace + * can use to query and control them: + * + * "WRITEBACK_FB_ID": + * Write-only object property storing a DRM_MODE_OBJECT_FB: it stores the + * framebuffer to be written by the writeback connector. This property is + * similar to the FB_ID property on planes, but will always read as zero + * and is not preserved across commits. + * Userspace must set this property to an output buffer every time it + * wishes the buffer to get filled. + * + * "WRITEBACK_PIXEL_FORMATS": + * Immutable blob property to store the supported pixel formats table. The + * data is an array of u32 DRM_FORMAT_* fourcc values. + * Userspace can use this blob to find out what pixel formats are supported + * by the connector's writeback engine. + */ + +static int create_writeback_properties(struct drm_device *dev) +{ + struct drm_property *prop; + + if (!dev->mode_config.writeback_fb_id_property) { + prop = drm_property_create_object(dev, DRM_MODE_PROP_ATOMIC, + "WRITEBACK_FB_ID", + DRM_MODE_OBJECT_FB); + if (!prop) + return -ENOMEM; + dev->mode_config.writeback_fb_id_property = prop; + } + + if (!dev->mode_config.writeback_pixel_formats_property) { + prop = drm_property_create(dev, DRM_MODE_PROP_BLOB | + DRM_MODE_PROP_ATOMIC | + DRM_MODE_PROP_IMMUTABLE, + "WRITEBACK_PIXEL_FORMATS", 0); + if (!prop) + return -ENOMEM; + dev->mode_config.writeback_pixel_formats_property = prop; + } + + return 0; +} + +static const struct drm_encoder_funcs drm_writeback_encoder_funcs = { + .destroy = drm_encoder_cleanup, +}; + +/** + * drm_writeback_connector_init - Initialize a writeback connector and its properties + * @dev: DRM device + * @wb_connector: Writeback connector to initialize + * @con_funcs: Connector funcs vtable + * @enc_helper_funcs: Encoder helper funcs vtable to be used by the internal encoder + * @formats: Array of supported pixel formats for the writeback engine + * @n_formats: Length of the formats array + * + * This function creates the writeback-connector-specific properties if they + * have not been already created, initializes the connector as + * type DRM_MODE_CONNECTOR_WRITEBACK, and correctly initializes the property + * values. It will also create an internal encoder associated with the + * drm_writeback_connector and set it to use the @enc_helper_funcs vtable for + * the encoder helper. + * + * Drivers should always use this function instead of drm_connector_init() to + * set up writeback connectors. + * + * Returns: 0 on success, or a negative error code + */ +int drm_writeback_connector_init(struct drm_device *dev, + struct drm_writeback_connector *wb_connector, + const struct drm_connector_funcs *con_funcs, + const struct drm_encoder_helper_funcs *enc_helper_funcs, + const u32 *formats, int n_formats) +{ + struct drm_property_blob *blob; + struct drm_connector *connector = &wb_connector->base; + struct drm_mode_config *config = &dev->mode_config; + int ret = create_writeback_properties(dev); + + if (ret != 0) + return ret; + + blob = drm_property_create_blob(dev, n_formats * sizeof(*formats), + formats); + if (IS_ERR(blob)) + return PTR_ERR(blob); + + drm_encoder_helper_add(&wb_connector->encoder, enc_helper_funcs); + ret = drm_encoder_init(dev, &wb_connector->encoder, + &drm_writeback_encoder_funcs, + DRM_MODE_ENCODER_VIRTUAL, NULL); + if (ret) + goto fail; + + connector->interlace_allowed = 0; + + ret = drm_connector_init(dev, connector, con_funcs, + DRM_MODE_CONNECTOR_WRITEBACK); + if (ret) + goto connector_fail; + + ret = drm_mode_connector_attach_encoder(connector, + &wb_connector->encoder); + if (ret) + goto attach_fail; + + INIT_LIST_HEAD(&wb_connector->job_queue); + spin_lock_init(&wb_connector->job_lock); + + drm_object_attach_property(&connector->base, + config->writeback_fb_id_property, 0); + + drm_object_attach_property(&connector->base, + config->writeback_pixel_formats_property, + blob->base.id); + wb_connector->pixel_formats_blob_ptr = blob; + + return 0; + +attach_fail: + drm_connector_cleanup(connector); +connector_fail: + drm_encoder_cleanup(&wb_connector->encoder); +fail: + drm_property_blob_put(blob); + return ret; +} +EXPORT_SYMBOL(drm_writeback_connector_init); + +/** + * drm_writeback_queue_job - Queue a writeback job for later signalling + * @wb_connector: The writeback connector to queue a job on + * @job: The job to queue + * + * This function adds a job to the job_queue for a writeback connector. It + * should be considered to take ownership of the writeback job, and so any other + * references to the job must be cleared after calling this function. + * + * Drivers must ensure that for a given writeback connector, jobs are queued in + * exactly the same order as they will be completed by the hardware (and + * signaled via drm_writeback_signal_completion). + * + * For every call to drm_writeback_queue_job() there must be exactly one call to + * drm_writeback_signal_completion() + * + * See also: drm_writeback_signal_completion() + */ +void drm_writeback_queue_job(struct drm_writeback_connector *wb_connector, + struct drm_writeback_job *job) +{ + unsigned long flags; + + spin_lock_irqsave(&wb_connector->job_lock, flags); + list_add_tail(&job->list_entry, &wb_connector->job_queue); + spin_unlock_irqrestore(&wb_connector->job_lock, flags); +} +EXPORT_SYMBOL(drm_writeback_queue_job); + +/* + * @cleanup_work: deferred cleanup of a writeback job + * + * The job cannot be cleaned up directly in drm_writeback_signal_completion, + * because it may be called in interrupt context. Dropping the framebuffer + * reference can sleep, and so the cleanup is deferred to a workqueue. + */ +static void cleanup_work(struct work_struct *work) +{ + struct drm_writeback_job *job = container_of(work, + struct drm_writeback_job, + cleanup_work); + drm_framebuffer_put(job->fb); + kfree(job); +} + + +/** + * drm_writeback_signal_completion - Signal the completion of a writeback job + * @wb_connector: The writeback connector whose job is complete + * + * Drivers should call this to signal the completion of a previously queued + * writeback job. It should be called as soon as possible after the hardware + * has finished writing, and may be called from interrupt context. + * It is the driver's responsibility to ensure that for a given connector, the + * hardware completes writeback jobs in the same order as they are queued. + * + * Unless the driver is holding its own reference to the framebuffer, it must + * not be accessed after calling this function. + * + * See also: drm_writeback_queue_job() + */ +void +drm_writeback_signal_completion(struct drm_writeback_connector *wb_connector) +{ + unsigned long flags; + struct drm_writeback_job *job; + + spin_lock_irqsave(&wb_connector->job_lock, flags); + job = list_first_entry_or_null(&wb_connector->job_queue, + struct drm_writeback_job, + list_entry); + if (job) + list_del(&job->list_entry); + spin_unlock_irqrestore(&wb_connector->job_lock, flags); + + if (WARN_ON(!job)) + return; + + INIT_WORK(&job->cleanup_work, cleanup_work); + queue_work(system_long_wq, &job->cleanup_work); +} +EXPORT_SYMBOL(drm_writeback_signal_completion); diff --git a/include/drm/drm_atomic.h b/include/drm/drm_atomic.h index ca461b6cf71f..8254521b4583 100644 --- a/include/drm/drm_atomic.h +++ b/include/drm/drm_atomic.h @@ -594,6 +594,9 @@ void drm_atomic_set_fence_for_plane(struct drm_plane_state *plane_state, int __must_check drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state, struct drm_crtc *crtc); +int drm_atomic_set_writeback_fb_for_connector( + struct drm_connector_state *conn_state, + struct drm_framebuffer *fb); int __must_check drm_atomic_add_affected_connectors(struct drm_atomic_state *state, struct drm_crtc *crtc); diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index c5797c24edd3..716c3a0e0e1d 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -437,6 +437,19 @@ struct drm_connector_state { * protection. This is most commonly used for HDCP. */ unsigned int content_protection; + + /** + * @writeback_job: Writeback job for writeback connectors + * + * Holds the framebuffer for a writeback connector. As the writeback + * completion may be asynchronous to the normal commit cycle, the + * writeback job lifetime is managed separately from the normal atomic + * state by this object. + * + * See also: drm_writeback_queue_job() and + * drm_writeback_signal_completion() + */ + struct drm_writeback_job *writeback_job; }; /** diff --git a/include/drm/drm_mode_config.h b/include/drm/drm_mode_config.h index fb45839179dd..5f24329e6927 100644 --- a/include/drm/drm_mode_config.h +++ b/include/drm/drm_mode_config.h @@ -784,6 +784,21 @@ struct drm_mode_config { */ struct drm_property *panel_orientation_property; + /** + * @writeback_fb_id_property: Property for writeback connectors, storing + * the ID of the output framebuffer. + * See also: drm_writeback_connector_init() + */ + struct drm_property *writeback_fb_id_property; + + /** + * @writeback_pixel_formats_property: Property for writeback connectors, + * storing an array of the supported pixel formats for the writeback + * engine (read-only). + * See also: drm_writeback_connector_init() + */ + struct drm_property *writeback_pixel_formats_property; + /* dumb ioctl parameters */ uint32_t preferred_depth, prefer_shadow; diff --git a/include/drm/drm_modeset_helper_vtables.h b/include/drm/drm_modeset_helper_vtables.h index 35e2a3a79fc5..3b289773297c 100644 --- a/include/drm/drm_modeset_helper_vtables.h +++ b/include/drm/drm_modeset_helper_vtables.h @@ -974,6 +974,17 @@ struct drm_connector_helper_funcs { */ int (*atomic_check)(struct drm_connector *connector, struct drm_connector_state *state); + + /** + * @atomic_commit: + * + * This hook is to be used by drivers implementing writeback connectors + * that need a point when to commit the writeback job to the hardware. + * + * This callback is used by the atomic modeset helpers. + */ + void (*atomic_commit)(struct drm_connector *connector, + struct drm_writeback_job *writeback_job); }; /** diff --git a/include/drm/drm_writeback.h b/include/drm/drm_writeback.h new file mode 100644 index 000000000000..17cd1feecd7e --- /dev/null +++ b/include/drm/drm_writeback.h @@ -0,0 +1,91 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * (C) COPYRIGHT 2016 ARM Limited. All rights reserved. + * Author: Brian Starkey + * + * This program is free software and is provided to you under the terms of the + * GNU General Public License version 2 as published by the Free Software + * Foundation, and any use by you of this program is subject to the terms + * of such GNU licence. + */ + +#ifndef __DRM_WRITEBACK_H__ +#define __DRM_WRITEBACK_H__ +#include +#include +#include + +struct drm_writeback_connector { + struct drm_connector base; + + /** + * @encoder: Internal encoder used by the connector to fulfill + * the DRM framework requirements. The users of the + * @drm_writeback_connector control the behaviour of the @encoder + * by passing the @enc_funcs parameter to drm_writeback_connector_init() + * function. + */ + struct drm_encoder encoder; + + /** + * @pixel_formats_blob_ptr: + * + * DRM blob property data for the pixel formats list on writeback + * connectors + * See also drm_writeback_connector_init() + */ + struct drm_property_blob *pixel_formats_blob_ptr; + + /** @job_lock: Protects job_queue */ + spinlock_t job_lock; + + /** + * @job_queue: + * + * Holds a list of a connector's writeback jobs; the last item is the + * most recent. The first item may be either waiting for the hardware + * to begin writing, or currently being written. + * + * See also: drm_writeback_queue_job() and + * drm_writeback_signal_completion() + */ + struct list_head job_queue; +}; + +struct drm_writeback_job { + /** + * @cleanup_work: + * + * Used to allow drm_writeback_signal_completion to defer dropping the + * framebuffer reference to a workqueue + */ + struct work_struct cleanup_work; + + /** + * @list_entry: + * + * List item for the writeback connector's @job_queue + */ + struct list_head list_entry; + + /** + * @fb: + * + * Framebuffer to be written to by the writeback connector. Do not set + * directly, use drm_atomic_set_writeback_fb_for_connector() + */ + struct drm_framebuffer *fb; +}; + +int drm_writeback_connector_init(struct drm_device *dev, + struct drm_writeback_connector *wb_connector, + const struct drm_connector_funcs *con_funcs, + const struct drm_encoder_helper_funcs *enc_helper_funcs, + const u32 *formats, int n_formats); + +void drm_writeback_queue_job(struct drm_writeback_connector *wb_connector, + struct drm_writeback_job *job); + +void drm_writeback_cleanup_job(struct drm_writeback_job *job); +void drm_writeback_signal_completion(struct drm_writeback_connector *wb_connector); +#endif diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h index 971c016b368c..8d67243952f4 100644 --- a/include/uapi/drm/drm_mode.h +++ b/include/uapi/drm/drm_mode.h @@ -351,6 +351,7 @@ enum drm_mode_subconnector { #define DRM_MODE_CONNECTOR_VIRTUAL 15 #define DRM_MODE_CONNECTOR_DSI 16 #define DRM_MODE_CONNECTOR_DPI 17 +#define DRM_MODE_CONNECTOR_WRITEBACK 18 struct drm_mode_get_connector { -- cgit v1.2.3 From b13cc8dd588434e2aec781e6d12224e4c408ac18 Mon Sep 17 00:00:00 2001 From: Brian Starkey Date: Wed, 29 Mar 2017 17:42:33 +0100 Subject: drm: writeback: Add out-fences for writeback connectors Add the WRITEBACK_OUT_FENCE_PTR property to writeback connectors, to enable userspace to get a fence which will signal once the writeback is complete. It is not allowed to request an out-fence without a framebuffer attached to the connector. A timeline is added to drm_writeback_connector for use by the writeback out-fences. In the case of a commit failure or DRM_MODE_ATOMIC_TEST_ONLY, the fence is set to -1. Changes from v2: - Rebase onto Gustavo Padovan's v9 explicit sync series - Change out_fence_ptr type to s32 __user * - Set *out_fence_ptr to -1 in drm_atomic_connector_set_property - Store fence in drm_writeback_job Gustavo Padovan: - Move out_fence_ptr out of connector_state - Signal fence from drm_writeback_signal_completion instead of in driver directly Changes from v3: - Rebase onto commit 7e9081c5aac7 ("drm/fence: fix memory overwrite when setting out_fence fd") (change out_fence_ptr to s32 __user *, for real this time.) - Update documentation around WRITEBACK_OUT_FENCE_PTR Signed-off-by: Brian Starkey [rebased and fixed conflicts] Signed-off-by: Mihail Atanassov Signed-off-by: Liviu Dudau Reviewed-by: Eric Anholt Reviewed-by: Sean Paul Link: https://patchwork.freedesktop.org/patch/229036/ --- drivers/gpu/drm/drm_atomic.c | 99 ++++++++++++++++++++++++++++++++---- drivers/gpu/drm/drm_writeback.c | 109 +++++++++++++++++++++++++++++++++++++++- include/drm/drm_atomic.h | 8 +++ include/drm/drm_connector.h | 8 +-- include/drm/drm_mode_config.h | 8 +++ include/drm/drm_writeback.h | 41 ++++++++++++++- 6 files changed, 257 insertions(+), 16 deletions(-) (limited to 'include') diff --git a/drivers/gpu/drm/drm_atomic.c b/drivers/gpu/drm/drm_atomic.c index 3e53d6e5c340..115719059434 100644 --- a/drivers/gpu/drm/drm_atomic.c +++ b/drivers/gpu/drm/drm_atomic.c @@ -318,6 +318,35 @@ static s32 __user *get_out_fence_for_crtc(struct drm_atomic_state *state, return fence_ptr; } +static int set_out_fence_for_connector(struct drm_atomic_state *state, + struct drm_connector *connector, + s32 __user *fence_ptr) +{ + unsigned int index = drm_connector_index(connector); + + if (!fence_ptr) + return 0; + + if (put_user(-1, fence_ptr)) + return -EFAULT; + + state->connectors[index].out_fence_ptr = fence_ptr; + + return 0; +} + +static s32 __user *get_out_fence_for_connector(struct drm_atomic_state *state, + struct drm_connector *connector) +{ + unsigned int index = drm_connector_index(connector); + s32 __user *fence_ptr; + + fence_ptr = state->connectors[index].out_fence_ptr; + state->connectors[index].out_fence_ptr = NULL; + + return fence_ptr; +} + /** * drm_atomic_set_mode_for_crtc - set mode for CRTC * @state: the CRTC whose incoming state to update @@ -727,6 +756,12 @@ static int drm_atomic_connector_check(struct drm_connector *connector, return -EINVAL; } + if (writeback_job->out_fence && !writeback_job->fb) { + DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] requesting out-fence without framebuffer\n", + connector->base.id, connector->name); + return -EINVAL; + } + return 0; } @@ -1367,6 +1402,11 @@ static int drm_atomic_connector_set_property(struct drm_connector *connector, if (fb) drm_framebuffer_put(fb); return ret; + } else if (property == config->writeback_out_fence_ptr_property) { + s32 __user *fence_ptr = u64_to_user_ptr(val); + + return set_out_fence_for_connector(state->state, connector, + fence_ptr); } else if (connector->funcs->atomic_set_property) { return connector->funcs->atomic_set_property(connector, state, property, val); @@ -1456,6 +1496,8 @@ drm_atomic_connector_get_property(struct drm_connector *connector, } else if (property == config->writeback_fb_id_property) { /* Writeback framebuffer is one-shot, write and forget */ *val = 0; + } else if (property == config->writeback_out_fence_ptr_property) { + *val = 0; } else if (connector->funcs->atomic_get_property) { return connector->funcs->atomic_get_property(connector, state, property, val); @@ -2292,7 +2334,7 @@ static int setup_out_fence(struct drm_out_fence_state *fence_state, return 0; } -static int prepare_crtc_signaling(struct drm_device *dev, +static int prepare_signaling(struct drm_device *dev, struct drm_atomic_state *state, struct drm_mode_atomic *arg, struct drm_file *file_priv, @@ -2301,6 +2343,8 @@ static int prepare_crtc_signaling(struct drm_device *dev, { struct drm_crtc *crtc; struct drm_crtc_state *crtc_state; + struct drm_connector *conn; + struct drm_connector_state *conn_state; int i, c = 0, ret; if (arg->flags & DRM_MODE_ATOMIC_TEST_ONLY) @@ -2366,6 +2410,43 @@ static int prepare_crtc_signaling(struct drm_device *dev, c++; } + for_each_new_connector_in_state(state, conn, conn_state, i) { + struct drm_writeback_job *job; + struct drm_out_fence_state *f; + struct dma_fence *fence; + s32 __user *fence_ptr; + + fence_ptr = get_out_fence_for_connector(state, conn); + if (!fence_ptr) + continue; + + job = drm_atomic_get_writeback_job(conn_state); + if (!job) + return -ENOMEM; + + f = krealloc(*fence_state, sizeof(**fence_state) * + (*num_fences + 1), GFP_KERNEL); + if (!f) + return -ENOMEM; + + memset(&f[*num_fences], 0, sizeof(*f)); + + f[*num_fences].out_fence_ptr = fence_ptr; + *fence_state = f; + + fence = drm_writeback_get_out_fence((struct drm_writeback_connector *)conn); + if (!fence) + return -ENOMEM; + + ret = setup_out_fence(&f[(*num_fences)++], fence); + if (ret) { + dma_fence_put(fence); + return ret; + } + + job->out_fence = fence; + } + /* * Having this flag means user mode pends on event which will never * reach due to lack of at least one CRTC for signaling @@ -2376,11 +2457,11 @@ static int prepare_crtc_signaling(struct drm_device *dev, return 0; } -static void complete_crtc_signaling(struct drm_device *dev, - struct drm_atomic_state *state, - struct drm_out_fence_state *fence_state, - unsigned int num_fences, - bool install_fds) +static void complete_signaling(struct drm_device *dev, + struct drm_atomic_state *state, + struct drm_out_fence_state *fence_state, + unsigned int num_fences, + bool install_fds) { struct drm_crtc *crtc; struct drm_crtc_state *crtc_state; @@ -2550,8 +2631,8 @@ retry: drm_mode_object_put(obj); } - ret = prepare_crtc_signaling(dev, state, arg, file_priv, &fence_state, - &num_fences); + ret = prepare_signaling(dev, state, arg, file_priv, &fence_state, + &num_fences); if (ret) goto out; @@ -2567,7 +2648,7 @@ retry: } out: - complete_crtc_signaling(dev, state, fence_state, num_fences, !ret); + complete_signaling(dev, state, fence_state, num_fences, !ret); if (ret == -EDEADLK) { drm_atomic_state_clear(state); diff --git a/drivers/gpu/drm/drm_writeback.c b/drivers/gpu/drm/drm_writeback.c index e5b8a4b79724..827395071f0b 100644 --- a/drivers/gpu/drm/drm_writeback.c +++ b/drivers/gpu/drm/drm_writeback.c @@ -14,6 +14,7 @@ #include #include #include +#include /** * DOC: overview @@ -31,6 +32,16 @@ * framebuffer applies only to a single commit (see below). A framebuffer may * not be attached while the CRTC is off. * + * Unlike with planes, when a writeback framebuffer is removed by userspace DRM + * makes no attempt to remove it from active use by the connector. This is + * because no method is provided to abort a writeback operation, and in any + * case making a new commit whilst a writeback is ongoing is undefined (see + * WRITEBACK_OUT_FENCE_PTR below). As soon as the current writeback is finished, + * the framebuffer will automatically no longer be in active use. As it will + * also have already been removed from the framebuffer list, there will be no + * way for any userspace application to retrieve a reference to it in the + * intervening period. + * * Writeback connectors have some additional properties, which userspace * can use to query and control them: * @@ -47,8 +58,54 @@ * data is an array of u32 DRM_FORMAT_* fourcc values. * Userspace can use this blob to find out what pixel formats are supported * by the connector's writeback engine. + * + * "WRITEBACK_OUT_FENCE_PTR": + * Userspace can use this property to provide a pointer for the kernel to + * fill with a sync_file file descriptor, which will signal once the + * writeback is finished. The value should be the address of a 32-bit + * signed integer, cast to a u64. + * Userspace should wait for this fence to signal before making another + * commit affecting any of the same CRTCs, Planes or Connectors. + * **Failure to do so will result in undefined behaviour.** + * For this reason it is strongly recommended that all userspace + * applications making use of writeback connectors *always* retrieve an + * out-fence for the commit and use it appropriately. + * From userspace, this property will always read as zero. */ +#define fence_to_wb_connector(x) container_of(x->lock, \ + struct drm_writeback_connector, \ + fence_lock) + +static const char *drm_writeback_fence_get_driver_name(struct dma_fence *fence) +{ + struct drm_writeback_connector *wb_connector = + fence_to_wb_connector(fence); + + return wb_connector->base.dev->driver->name; +} + +static const char * +drm_writeback_fence_get_timeline_name(struct dma_fence *fence) +{ + struct drm_writeback_connector *wb_connector = + fence_to_wb_connector(fence); + + return wb_connector->timeline_name; +} + +static bool drm_writeback_fence_enable_signaling(struct dma_fence *fence) +{ + return true; +} + +static const struct dma_fence_ops drm_writeback_fence_ops = { + .get_driver_name = drm_writeback_fence_get_driver_name, + .get_timeline_name = drm_writeback_fence_get_timeline_name, + .enable_signaling = drm_writeback_fence_enable_signaling, + .wait = dma_fence_default_wait, +}; + static int create_writeback_properties(struct drm_device *dev) { struct drm_property *prop; @@ -72,6 +129,15 @@ static int create_writeback_properties(struct drm_device *dev) dev->mode_config.writeback_pixel_formats_property = prop; } + if (!dev->mode_config.writeback_out_fence_ptr_property) { + prop = drm_property_create_range(dev, DRM_MODE_PROP_ATOMIC, + "WRITEBACK_OUT_FENCE_PTR", 0, + U64_MAX); + if (!prop) + return -ENOMEM; + dev->mode_config.writeback_out_fence_ptr_property = prop; + } + return 0; } @@ -141,6 +207,15 @@ int drm_writeback_connector_init(struct drm_device *dev, INIT_LIST_HEAD(&wb_connector->job_queue); spin_lock_init(&wb_connector->job_lock); + wb_connector->fence_context = dma_fence_context_alloc(1); + spin_lock_init(&wb_connector->fence_lock); + snprintf(wb_connector->timeline_name, + sizeof(wb_connector->timeline_name), + "CONNECTOR:%d-%s", connector->base.id, connector->name); + + drm_object_attach_property(&connector->base, + config->writeback_out_fence_ptr_property, 0); + drm_object_attach_property(&connector->base, config->writeback_fb_id_property, 0); @@ -210,6 +285,7 @@ static void cleanup_work(struct work_struct *work) /** * drm_writeback_signal_completion - Signal the completion of a writeback job * @wb_connector: The writeback connector whose job is complete + * @status: Status code to set in the writeback out_fence (0 for success) * * Drivers should call this to signal the completion of a previously queued * writeback job. It should be called as soon as possible after the hardware @@ -223,7 +299,8 @@ static void cleanup_work(struct work_struct *work) * See also: drm_writeback_queue_job() */ void -drm_writeback_signal_completion(struct drm_writeback_connector *wb_connector) +drm_writeback_signal_completion(struct drm_writeback_connector *wb_connector, + int status) { unsigned long flags; struct drm_writeback_job *job; @@ -232,8 +309,15 @@ drm_writeback_signal_completion(struct drm_writeback_connector *wb_connector) job = list_first_entry_or_null(&wb_connector->job_queue, struct drm_writeback_job, list_entry); - if (job) + if (job) { list_del(&job->list_entry); + if (job->out_fence) { + if (status) + dma_fence_set_error(job->out_fence, status); + dma_fence_signal(job->out_fence); + dma_fence_put(job->out_fence); + } + } spin_unlock_irqrestore(&wb_connector->job_lock, flags); if (WARN_ON(!job)) @@ -243,3 +327,24 @@ drm_writeback_signal_completion(struct drm_writeback_connector *wb_connector) queue_work(system_long_wq, &job->cleanup_work); } EXPORT_SYMBOL(drm_writeback_signal_completion); + +struct dma_fence * +drm_writeback_get_out_fence(struct drm_writeback_connector *wb_connector) +{ + struct dma_fence *fence; + + if (WARN_ON(wb_connector->base.connector_type != + DRM_MODE_CONNECTOR_WRITEBACK)) + return NULL; + + fence = kzalloc(sizeof(*fence), GFP_KERNEL); + if (!fence) + return NULL; + + dma_fence_init(fence, &drm_writeback_fence_ops, + &wb_connector->fence_lock, wb_connector->fence_context, + ++wb_connector->fence_seqno); + + return fence; +} +EXPORT_SYMBOL(drm_writeback_get_out_fence); diff --git a/include/drm/drm_atomic.h b/include/drm/drm_atomic.h index 8254521b4583..da9d95a19580 100644 --- a/include/drm/drm_atomic.h +++ b/include/drm/drm_atomic.h @@ -160,6 +160,14 @@ struct __drm_crtcs_state { struct __drm_connnectors_state { struct drm_connector *ptr; struct drm_connector_state *state, *old_state, *new_state; + /** + * @out_fence_ptr: + * + * User-provided pointer which the kernel uses to return a sync_file + * file descriptor. Used by writeback connectors to signal completion of + * the writeback. + */ + s32 __user *out_fence_ptr; }; struct drm_private_obj; diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index 716c3a0e0e1d..14ab58ade87f 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -441,10 +441,10 @@ struct drm_connector_state { /** * @writeback_job: Writeback job for writeback connectors * - * Holds the framebuffer for a writeback connector. As the writeback - * completion may be asynchronous to the normal commit cycle, the - * writeback job lifetime is managed separately from the normal atomic - * state by this object. + * Holds the framebuffer and out-fence for a writeback connector. As + * the writeback completion may be asynchronous to the normal commit + * cycle, the writeback job lifetime is managed separately from the + * normal atomic state by this object. * * See also: drm_writeback_queue_job() and * drm_writeback_signal_completion() diff --git a/include/drm/drm_mode_config.h b/include/drm/drm_mode_config.h index 5f24329e6927..f4a173c8d79c 100644 --- a/include/drm/drm_mode_config.h +++ b/include/drm/drm_mode_config.h @@ -798,6 +798,14 @@ struct drm_mode_config { * See also: drm_writeback_connector_init() */ struct drm_property *writeback_pixel_formats_property; + /** + * @writeback_out_fence_ptr_property: Property for writeback connectors, + * fd pointer representing the outgoing fences for a writeback + * connector. Userspace should provide a pointer to a value of type s32, + * and then cast that pointer to u64. + * See also: drm_writeback_connector_init() + */ + struct drm_property *writeback_out_fence_ptr_property; /* dumb ioctl parameters */ uint32_t preferred_depth, prefer_shadow; diff --git a/include/drm/drm_writeback.h b/include/drm/drm_writeback.h index 17cd1feecd7e..a10fe556dfd4 100644 --- a/include/drm/drm_writeback.h +++ b/include/drm/drm_writeback.h @@ -50,6 +50,32 @@ struct drm_writeback_connector { * drm_writeback_signal_completion() */ struct list_head job_queue; + + /** + * @fence_context: + * + * timeline context used for fence operations. + */ + unsigned int fence_context; + /** + * @fence_lock: + * + * spinlock to protect the fences in the fence_context. + */ + spinlock_t fence_lock; + /** + * @fence_seqno: + * + * Seqno variable used as monotonic counter for the fences + * created on the connector's timeline. + */ + unsigned long fence_seqno; + /** + * @timeline_name: + * + * The name of the connector's fence timeline. + */ + char timeline_name[32]; }; struct drm_writeback_job { @@ -75,6 +101,13 @@ struct drm_writeback_job { * directly, use drm_atomic_set_writeback_fb_for_connector() */ struct drm_framebuffer *fb; + + /** + * @out_fence: + * + * Fence which will signal once the writeback has completed + */ + struct dma_fence *out_fence; }; int drm_writeback_connector_init(struct drm_device *dev, @@ -87,5 +120,11 @@ void drm_writeback_queue_job(struct drm_writeback_connector *wb_connector, struct drm_writeback_job *job); void drm_writeback_cleanup_job(struct drm_writeback_job *job); -void drm_writeback_signal_completion(struct drm_writeback_connector *wb_connector); + +void +drm_writeback_signal_completion(struct drm_writeback_connector *wb_connector, + int status); + +struct dma_fence * +drm_writeback_get_out_fence(struct drm_writeback_connector *wb_connector); #endif -- cgit v1.2.3 From d67b6a2065076d763c7df626b8c54f16038ad862 Mon Sep 17 00:00:00 2001 From: Liviu Dudau Date: Wed, 28 Feb 2018 14:11:23 +0000 Subject: drm: writeback: Add client capability for exposing writeback connectors Due to the fact that writeback connectors behave in a special way in DRM (they always report being disconnected) we might confuse some userspace. Add a client capability for writeback connectors that will filter them out for clients that don't understand the capability. Changelog: - only accept the capability if the client has already set the DRM_CLIENT_CAP_ATOMIC one. Cc: Sean Paul Cc: Brian Starkey Signed-off-by: Liviu Dudau Reviewed-by: Eric Anholt Reviewed-by: Brian Starkey Link: https://patchwork.freedesktop.org/patch/229038/ --- drivers/gpu/drm/drm_ioctl.c | 7 +++++++ drivers/gpu/drm/drm_mode_config.c | 5 +++++ include/drm/drm_file.h | 7 +++++++ include/uapi/drm/drm.h | 9 +++++++++ 4 files changed, 28 insertions(+) (limited to 'include') diff --git a/drivers/gpu/drm/drm_ioctl.c b/drivers/gpu/drm/drm_ioctl.c index 0d4cfb232576..fe49fb0356b5 100644 --- a/drivers/gpu/drm/drm_ioctl.c +++ b/drivers/gpu/drm/drm_ioctl.c @@ -334,6 +334,13 @@ drm_setclientcap(struct drm_device *dev, void *data, struct drm_file *file_priv) return -EINVAL; file_priv->aspect_ratio_allowed = req->value; break; + case DRM_CLIENT_CAP_WRITEBACK_CONNECTORS: + if (!file_priv->atomic) + return -EINVAL; + if (req->value > 1) + return -EINVAL; + file_priv->writeback_connectors = req->value; + break; default: return -EINVAL; } diff --git a/drivers/gpu/drm/drm_mode_config.c b/drivers/gpu/drm/drm_mode_config.c index e5c653357024..21e353bd3948 100644 --- a/drivers/gpu/drm/drm_mode_config.c +++ b/drivers/gpu/drm/drm_mode_config.c @@ -145,6 +145,11 @@ int drm_mode_getresources(struct drm_device *dev, void *data, count = 0; connector_id = u64_to_user_ptr(card_res->connector_id_ptr); drm_for_each_connector_iter(connector, &conn_iter) { + /* only expose writeback connectors if userspace understands them */ + if (!file_priv->writeback_connectors && + (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK)) + continue; + if (drm_lease_held(file_priv, connector->base.id)) { if (count < card_res->count_connectors && put_user(connector->base.id, connector_id + count)) { diff --git a/include/drm/drm_file.h b/include/drm/drm_file.h index 027ac16da3d1..26485acc51d7 100644 --- a/include/drm/drm_file.h +++ b/include/drm/drm_file.h @@ -192,6 +192,13 @@ struct drm_file { */ unsigned aspect_ratio_allowed:1; + /** + * @writeback_connectors: + * + * True if client understands writeback connectors + */ + unsigned writeback_connectors:1; + /** * @is_master: * diff --git a/include/uapi/drm/drm.h b/include/uapi/drm/drm.h index 9c660e1688ab..300f336633f2 100644 --- a/include/uapi/drm/drm.h +++ b/include/uapi/drm/drm.h @@ -687,6 +687,15 @@ struct drm_get_cap { */ #define DRM_CLIENT_CAP_ASPECT_RATIO 4 +/** + * DRM_CLIENT_CAP_WRITEBACK_CONNECTORS + * + * If set to 1, the DRM core will expose special connectors to be used for + * writing back to memory the scene setup in the commit. Depends on client + * also supporting DRM_CLIENT_CAP_ATOMIC + */ +#define DRM_CLIENT_CAP_WRITEBACK_CONNECTORS 5 + /** DRM_IOCTL_SET_CLIENT_CAP ioctl argument type */ struct drm_set_client_cap { __u64 capability; -- cgit v1.2.3