linux/Documentation/gpu, branch v5.11

drm/docs: Fix todo.rst

2020-11-18T10:51:58Z

I didnt' format the thing correctly :-( Fixes: 39aead8373b3 ("fbcon: Disable accelerated scrolling") Reviewed-by: Simon Ser Reported-by: Stephen Rothwell Cc: Stephen Rothwell Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20201118073637.597206-1-daniel.vetter@ffwll.ch

fbcon: Disable accelerated scrolling

2020-11-17T10:00:29Z

So ever since syzbot discovered fbcon, we have solid proof that it's full of bugs. And often the solution is to just delete code and remove features, e.g. 50145474f6ef ("fbcon: remove soft scrollback code"). Now the problem is that most modern-ish drivers really only treat fbcon as an dumb kernel console until userspace takes over, and Oops printer for some emergencies. Looking at drm drivers and the basic vesa/efi fbdev drivers shows that only 3 drivers support any kind of acceleration: - nouveau, seems to be enabled by default - omapdrm, when a DMM remapper exists using remapper rewriting for y/xpanning - gma500, but that is getting deleted now for the GTT remapper trick, and the accelerated copyarea never set the FBINFO_HWACCEL_COPYAREA flag, so unused (and could be deleted already I think). No other driver supportes accelerated fbcon. And fbcon is the only user of this accel code (it's not exposed as uapi through ioctls), which means we could garbage collect fairly enormous amounts of code if we kill this. Plus because syzbot only runs on virtual hardware, and none of the drivers for that have acceleration, we'd remove a huge gap in testing. And there's no other even remotely comprehensive testing aside from syzbot. This patch here just disables the acceleration code by always redrawing when scrolling. The plan is that once this has been merged for well over a year in released kernels, we can start to go around and delete a lot of code. v2: - Drop a few more unused local variables, somehow I missed the compiler warnings (Sam) - Fix typo in comment (Jiri) - add a todo entry for the cleanup (Thomas) v3: Remove more unused variables (0day) Reviewed-by: Tomi Valkeinen Reviewed-by: Thomas Zimmermann Reviewed-by: Greg Kroah-Hartman Acked-by: Sam Ravnborg Cc: Jiri Slaby Cc: Bartlomiej Zolnierkiewicz Cc: Greg Kroah-Hartman Cc: Linus Torvalds Cc: Ben Skeggs Cc: nouveau@lists.freedesktop.org Cc: Tomi Valkeinen Cc: Daniel Vetter Cc: Jiri Slaby Cc: "Gustavo A. R. Silva" Cc: Tetsuo Handa Cc: Peilin Ye Cc: George Kennedy Cc: Nathan Chancellor Cc: Peter Rosin Signed-off-by: Daniel Vetter Link: https://patchwork.freedesktop.org/patch/msgid/20201029132229.4068359-1-daniel.vetter@ffwll.ch

Merge drm/drm-next into drm-misc-next

2020-11-10T16:11:37Z

We need commit f8f6ae5d077a ("mm: always have io_remap_pfn_range() set pgprot_decrypted()") to be able to merge Jason's cleanup patch. Signed-off-by: Thomas Zimmermann

Merge v5.10-rc3 into drm-next

2020-11-10T13:36:36Z

We need commit f8f6ae5d077a ("mm: always have io_remap_pfn_range() set pgprot_decrypted()") to be able to merge Jason's cleanup patch. Signed-off-by: Daniel Vetter

drm/fb_helper: Support framebuffers in I/O memory

2020-11-09T08:20:00Z

At least sparc64 requires I/O-specific access to framebuffers. This patch updates the fbdev console accordingly. For drivers with direct access to the framebuffer memory, the callback functions in struct fb_ops test for the type of memory and call the rsp fb_sys_ of fb_cfb_ functions. Read and write operations are implemented internally by DRM's fbdev helper. For drivers that employ a shadow buffer, fbdev's blit function retrieves the framebuffer address as struct dma_buf_map, and uses dma_buf_map interfaces to access the buffer. The bochs driver on sparc64 uses a workaround to flag the framebuffer as I/O memory and avoid a HW exception. With the introduction of struct dma_buf_map, this is not required any longer. The patch removes the rsp code from both, bochs and fbdev. v7: * use min_t(size_t,) (kernel test robot) * return the number of bytes read/written, if any (fbdev testcase) v5: * implement fb_read/fb_write internally (Daniel, Sam) v4: * move dma_buf_map changes into separate patch (Daniel) * TODO list: comment on fbdev updates (Daniel) Signed-off-by: Thomas Zimmermann Reviewed-by: Daniel Vetter Reviewed-by: Sam Ravnborg Tested-by: Sam Ravnborg Link: https://patchwork.freedesktop.org/patch/msgid/20201103093015.1063-11-tzimmermann@suse.de

drm/gem: Use struct dma_buf_map in GEM vmap ops and convert GEM backends

2020-11-09T08:19:24Z

This patch replaces the vmap/vunmap's use of raw pointers in GEM object functions with instances of struct dma_buf_map. GEM backends are converted as well. For most of them, this simply changes the returned type. TTM-based drivers now return information about the location of the memory, either system or I/O memory. GEM VRAM helpers and qxl now use ttm_bo_vmap() et al. Amdgpu, nouveau and radeon use drm_gem_ttm_vmap() et al instead of implementing their own vmap callbacks. v7: * init QXL cursor to mapped BO buffer (kernel test robot) v5: * update vkms after switch to shmem v4: * use ttm_bo_vmap(), drm_gem_ttm_vmap(), et al. (Daniel, Christian) * fix a trailing { in drm_gem_vmap() * remove several empty functions instead of converting them (Daniel) * comment uses of raw pointers with a TODO (Daniel) * TODO list: convert more helpers to use struct dma_buf_map Signed-off-by: Thomas Zimmermann Acked-by: Christian König Tested-by: Sam Ravnborg Link: https://patchwork.freedesktop.org/patch/msgid/20201103093015.1063-7-tzimmermann@suse.de

Merge tag 'drm-misc-next-2020-11-05' of git://anongit.freedesktop.org/drm/drm-misc into drm-next

2020-11-06T05:00:01Z

drm-misc-next for 5.11: UAPI Changes: Cross-subsystem Changes: - arch/arm64: Describe G12b GPU as coherent - iommu: Support coherency for Mali LPAE Core Changes: - atomic: Pass full state to CRTC atomic_{check, begin, flush}(); Use atomic-state pointers - drm: Remove SCATTER_LIST_MAX_SEGMENT; Cleanups - doc: Document legacy_cursor_update better; cleanups - edid: Don't warn n EDIDs of zero - ttm: New backend allocation pool; Remove old page allocator; Rework no_retry handling; Replace flags with booleans in struct ttm_operation_ctx - vram-helper: Cleanups - fbdev: Cleanups - console: Store font size as unsigned value Driver Changes: - ast: Support new display mode - amdgpu: Switch to new TTM allocator - hisilicon: Cleanups - nouveau: Switch to new TTM allocator; Fix include of swiotbl.h and limits.h; Use state helper instead of CRTC state pointer - panfrost: Support cache-coherent integrations; Fix mutex corruption on open/close; Cleanupse - qxl: Cleanups - radeon: Switch to new TTM allocator - ticdc: Fix build failure - vmwgfx: Switch to new TTM allocator - xlnx: Use dma_request_chan - fbdev/sh_mobile: Cleanups Signed-off-by: Dave Airlie From: Thomas Zimmermann Link: https://patchwork.freedesktop.org/patch/msgid/20201105101641.GA13099@linux-uq9g

Merge tag 'drm-intel-next-queued-2020-11-03' of git://anongit.freedesktop.org/drm/drm-intel into drm-next

2020-11-04T02:17:34Z

drm/i915 features for v5.11 Highlights: - More DG1 enabling (Lucas, Matt, Aditya, Anshuman, Clinton, Matt, Stuart, Venkata) - Integer scaling filter support (Pankaj Bharadiya) - Asynchronous flip support (Karthik) Generic: - Fix gen12 forcewake tables (Matt) - Haswell PCI ID updates (Alexei Podtelezhnikov) Display: - ICL+ DSI command mode enabling (Vandita) - Shutdown displays grafecully on reboot/shutdown (Ville) - Don't register display debugfs when there is no display (Lucas) - Fix RKL CDCLK table (Matt) - Limit EHL/JSL eDP to HBR2 (José) - Handle incorrectly set (by BIOS) PLLs and DP link rates at probe (Imre) - Fix mode valid check wrt bpp for "YCbCr 4:2:0 only" modes (Ville) - State checker and dump fixes (Ville) - DP AUX backlight updates (Aaron Ma, Sean Paul) - Add DP LTTPR non-transparent link training mode (Imre) - PSR2 selective fetch enabling (José) - VBT updates (José) - HDCP updates (Ramalingam) Cleanups and refactoring: - HPD pin, AUX channel, and Type-C port identifier cleanup (Ville) - Hotplug and irq refactoring (Ville) - Better DDI encoder and AUX channel names (Ville) - Color LUT code cleanups (Ville) - Combo PHY code cleanups (Ville) - LSPCON code cleanups (Ville) - Documentation fixes (Mauro, Chris) Signed-off-by: Dave Airlie From: Jani Nikula Link: https://patchwork.freedesktop.org/patch/msgid/87o8kehbaj.fsf@intel.com

Merge tag 'drm-misc-next-2020-10-27' of git://anongit.freedesktop.org/drm/drm-misc into drm-next

2020-11-04T01:49:10Z

drm-misc-next for 5.11: UAPI Changes: - doc: rules for EBUSY on non-blocking commits; requirements for fourcc modifiers; on parsing EDID - fbdev/sbuslib: Remove unused FBIOSCURSOR32 - fourcc: deprecate DRM_FORMAT_MOD_NONE - virtio: Support blob resources for memory allocations; Expose host-visible and cross-device features Cross-subsystem Changes: - devicetree: Add vendor Prefix for Yes Optoelectronics, Shanghai Top Display Optoelectronics - dma-buf: Add struct dma_buf_map that stores DMA pointer and I/O-memory flag; dma_buf_vmap()/vunmap() return address in dma_buf_map; Use struct_size() macro Core Changes: - atomic: pass full state to CRTC atomic enable/disable; warn for EBUSY during non-blocking commits - dp: Prepare for DP 2.0 DPCD - dp_mst: Receive extended DPCD caps - dma-buf: Documentation - doc: Format modifiers; dma-buf-map; Cleanups - fbdev: Don't use compat_alloc_user_space(); mark as orphaned - fb-helper: Take lock in drm_fb_helper_restore_work_fb() - gem: Convert implementation and drivers to GEM object functions, remove GEM callbacks from struct drm_driver (expect gem_prime_mmap) - panel: Cleanups - pci: Add legacy infix to drm_irq_by_busid() - sched: Avoid infinite waits in drm_sched_entity_destroy() - switcheroo: Cleanups - ttm: Remove AGP support; Don't modify caching during swapout; Major refactoring of the implementation and API that affects all depending drivers; Add ttm_bo_wait_ctx(); Add ttm_bo_pin()/unpin() in favor of TTM_PL_FLAG_NO_EVICT; Remove ttm_bo_create(); Remove fault_reserve_notify() callback; Push move() implementation into drivers; Remove TTM_PAGE_FLAG_WRITE; Replace caching flags with init-time cache setting; Push ttm_tt_bind() into drivers; Replace move_notify() with delete_mem_notify(); No overlapping memcpy(); no more ttm_set_populated() - vram-helper: Fix BO top-down placement; TTM-related changes; Init GEM object functions with defaults; Default placement in system memory; Cleanups Driver Changes: - amdgpu: Use GEM object functions - armada: Use GEM object functions - aspeed: Configure output via sysfs; Init struct drm_driver with - ast: Reload LUT after FB format changes - bridge: Add driver and DT bindings for anx7625; Cleanups - bridge/dw-hdmi: Constify ops - bridge/ti-sn65dsi86: Add retries for link training - bridge/lvds-codec: Add support for regulator - bridge/tc358768: Restore connector support DRM_GEM_CMA_DRIVEROPS; Cleanups - display/ti,j721e-dss: Add DT properies assigned-clocks, assigned-clocks-parent and dma-coherent - display/ti,am65s-dss: Add DT properies assigned-clocks, assigned-clocks-parent and dma-coherent - etnaviv: Use GEM object functions - exynos: Use GEM object functions - fbdev: Cleanups and compiler fixes throughout framebuffer drivers - fbdev/cirrusfb: Avoid division by 0 - gma500: Use GEM object functions; Fix double-free of connector; Cleanups - hisilicon/hibmc: I2C-based DDC support; Use to_hibmc_drm_device(); Cleanups - i915: Use GEM object functions - imx/dcss: Init driver with DRM_GEM_CMA_DRIVER_OPS; Cleanups - ingenic: Reset pixel clock when parent clock changes; support reserved memory; Alloc F0 and F1 DMA channels at once; Support different pixel formats; Revert support for cached mmap buffers on F0/F1; support 30-bit/24-bit/8-bit-palette modes - komeda: Use DEFINE_SHOW_ATTRIBUTE - mcde: Detect platform_get_irq() errors - mediatek: Use GEM object functions - msm: Use GEM object functions - nouveau: Cleanups; TTM-related changes; Use GEM object functions - omapdrm: Use GEM object functions - panel: Add driver and DT bindings for Novatak nt36672a; Add driver and DT bindings for YTC700TLAG-05-201C; Add driver and DT bindings for TDO TL070WSH30; Cleanups - panel/mantix: Fix reset; Fix deref of NULL pointer in mantix_get_modes() - panel/otm8009a: Allow non-continuous dsi clock; Cleanups - panel/rm68200: Allow non-continuous dsi clock; Fix mode to 50 FPS - panfrost: Fix job timeout handling; Cleanups - pl111: Use GEM object functions - qxl: Cleanups; TTM-related changes; Pin new BOs with ttm_bo_init_reserved() - radeon: Cleanups; TTM-related changes; Use GEM object functions - rockchip: Use GEM object functions - shmobile: Cleanups - tegra: Use GEM object functions - tidss: Set drm_plane_helper_funcs.prepare_fb - tilcdc: Don't keep vblank interrupt enabled all the time - tve200: Detect platform_get_irq() errors - vc4: Use GEM object functions; Only register components once DSI is attached; Add Maxime as maintainer - vgem: Use GEM object functions - via: Simplify critical section in via_mem_alloc() - virtgpu: Use GEM object functions - virtio: Implement blob resources, host-visible and cross-device features; Support mapping of host-allocated resources; Use UUID APi; Cleanups - vkms: Use GEM object functions; Switch to SHMEM - vmwgfx: TTM-related changes; Inline ttm_bo_swapout_all() - xen: Use GEM object functions - xlnx: Use GEM object functions Signed-off-by: Dave Airlie From: Thomas Zimmermann Link: https://patchwork.freedesktop.org/patch/msgid/20201027100936.GA4858@linux-uq9g

Merge drm/drm-next into drm-misc-next

2020-11-02T10:17:54Z

Daniel needs -rc2 in drm-misc-next to merge some patches Signed-off-by: Maxime Ripard