linux/drivers/gpu/drm/amd/display/modules, branch v5.2

drm/amd/display: Fix and simplify apply_below_the_range()

2019-04-29T19:59:35Z

The comparison of inserted_frame_duration_in_us against a duration calculated from max_refresh_in_uhz is both wrong in its math and not needed, as the min_duration_in_us value is already cached in in_out_vrr for reuse. No need to recalculate it wrongly at each invocation. Signed-off-by: Mario Kleiner Reviewed-by: Nicholas Kazlauskas Signed-off-by: Alex Deucher

drm/amd/display: remove min reduction for abm 2.2 level 3

2019-04-10T18:53:28Z

[Why] Image brightness compensation for solid color full screen images is expected to be optimal for ABM 2.2 at level 3. The min reduction that is currently being enforced prevents this from being achieved. [How] Remove the min reduction for ABM 2.2 at level 3 Signed-off-by: Josip Pavic Reviewed-by: Anthony Koo Acked-by: Leo Li Signed-off-by: Alex Deucher

drm/amd/display: Fix VTEM InfoPacket programming

2019-03-21T04:39:48Z

Refactor setting bit fields. Correcting the offset of MD0. Initializing the InfoPacket header fields. Defining the field offsets and masks. Signed-off-by: Reza Amini Reviewed-by: Anthony Koo Acked-by: Bhawanpreet Lakha Signed-off-by: Alex Deucher

drm/amd/display: Programming correct VRR_EN bit in VTEM structure

2019-03-21T04:39:48Z

[Why] In HDMI plugfest, MTK report our EMP with VRR_EN bit = 0. VRR_EN bit is EMP-MD0-bit 0. Currently driver set 1 to bit 3. [How] Programming correct VRR_EN bit in EMP-MD0-bit0. Signed-off-by: Hugo Hu Reviewed-by: Reza Amini Acked-by: Bhawanpreet Lakha Signed-off-by: Alex Deucher

drm/amd/display: Add a hysteresis to BTR frame multiplier

2019-03-21T04:39:48Z

[Why] Flickering is observed on some displays when the number of inserted BTR frames changes frequently. [How] Add in a margin of drift to prevent the inserted number of frames from jumping around too frequently. Signed-off-by: Aric Cyr Reviewed-by: Nicholas Kazlauskas Acked-by: Bhawanpreet Lakha Signed-off-by: Alex Deucher

drm/amd/display: reduce abm min reduction, deviation gain and contrast factor

2019-03-19T20:36:49Z

[Why] Increased power savings are desired for ABM 2.2. [How] Reduce the minimum reduction level, the deviation gain and the contrast factor to allow for more aggressive operation of the algorithm. Signed-off-by: Josip Pavic Reviewed-by: Anthony Koo Acked-by: Leo Li Signed-off-by: Alex Deucher

drm/amd/display: Re-add custom degamma support

2019-03-19T20:04:03Z

[Why] The dc_gamma_type CUSTOM_GAMMA is used to represent degamma mappings passed in by drm. This type of gamma must be interpolated into a transfer function by apply_1d_lut. The line in mod_color_calculate_degamma_params that handled this case was erroneously removed. [How] For CUSTOM_GAMMA degamma, calculate the lut as before. Signed-off-by: David Francis Reviewed-by: Krunoslav Kovac Acked-by: Bhawanpreet Lakha Signed-off-by: Alex Deucher

drm/amd/display: Pass app_tf by value rather than by reference

2019-02-28T03:23:55Z

Clang warns when an expression that equals zero is used as a null pointer constant (in lieu of NULL): drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:4435:3: warning: expression which evaluates to zero treated as a null pointer constant of type 'const enum color_transfer_func *' [-Wnon-literal-null-conversion] TRANSFER_FUNC_UNKNOWN, ^~~~~~~~~~~~~~~~~~~~~ 1 warning generated. This warning is caused by commit bb47de736661 ("drm/amdgpu: Set FreeSync state using drm VRR properties") and it could be solved by using NULL instead of TRANSFER_FUNC_UNKNOWN or casting TRANSFER_FUNC_UNKNOWN as a pointer. However, after looking into it, there doesn't appear to be a good reason to pass app_tf by reference as it is never mutated along the way. This is the only code path in which app_tf is used: mod_freesync_build_vrr_infopacket -> build_vrr_infopacket_v2 -> build_vrr_infopacket_fs2_data Neither mod_freesync_build_vrr_infopacket or build_vrr_infopacket_v2 modify app_tf's value and build_vrr_infopacket_fs2_data expects just the value so we can avoid dereferencing anything by just passing in app_tf's value to mod_freesync_build_vrr_infopacket and build_vrr_infopacket_v2. There is no functional change because build_vrr_infopacket_fs2_data doesn't do anything if TRANSFER_FUNC_UNKNOWN is passed to it, the same as not calling build_vrr_infopacket_fs2_data at all like before this change when NULL was used for app_tf. Reviewed-by: Harry Wentland Signed-off-by: Nathan Chancellor Signed-off-by: Alex Deucher

drm/amd/display: Increase precision for backlight curve

2019-02-19T20:58:26Z

[Why] We are currently losing precision when we convert from 16 bit --> 8 bit --> 16 bit. [How] We shouldn't down convert unnecessarily and lose precision. Keep values at 16 bit and use directly. Signed-off-by: Anthony Koo Reviewed-by: Aric Cyr Acked-by: Leo Li Signed-off-by: Alex Deucher

drm/amd/display: Modify ABM 2.2 Max Reduction

2019-02-06T02:16:23Z

[Why] Reduced backlight for ABM 2.2 at levels 1 and 2 is desired for power savings. [How] Reduce the max reduction parameters for ABM 2.2 Signed-off-by: Josip Pavic Reviewed-by: Josip Pavic Acked-by: Bhawanpreet Lakha Signed-off-by: Alex Deucher