kernel/linux.git/drivers/gpu/drm/amd/display/dc, branch v6.6.47

drm/amd/display: Add delay to improve LTTPR UHBR interop

2024-08-14T11:58:44+00:00

[ Upstream commit 10839ee6a977ed1f7d0f4deb29f2d7e5d1f2a9dd ] [WHY] Avoid race condition which puts LTTPR into bad state during UHBR LT. [HOW] Delay 30ms between starting UHBR TPS1 PHY output and sending TPS1 via DPCD. Reviewed-by: Wenjing Liu Acked-by: Aurabindo Pillai Signed-off-by: Michael Strauss Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin

drm/amd/display: Check for NULL pointer

2024-08-03T06:54:16+00:00

commit 4ab68e168ae1695f7c04fae98930740aaf7c50fa upstream. [why & how] Need to make sure plane_state is initialized before accessing its members. Cc: Mario Limonciello Cc: Alex Deucher Cc: stable@vger.kernel.org Reviewed-by: Xi (Alex) Liu Signed-off-by: Sung Joon Kim Signed-off-by: Aurabindo Pillai Signed-off-by: Alex Deucher (cherry picked from commit 295d91cbc700651782a60572f83c24861607b648) Signed-off-by: Greg Kroah-Hartman

drm/amd/display: Account for cursor prefetch BW in DML1 mode support

2024-07-25T07:50:54+00:00

[ Upstream commit 074b3a886713f69d98d30bb348b1e4cb3ce52b22 ] [Description] We need to ensure to take into account cursor prefetch BW in mode support or we may pass ModeQuery but fail an actual flip which will cause a hang. Flip may fail because the cursor_pre_bw is populated during mode programming (and mode programming is never called prior to ModeQuery). Reviewed-by: Chaitanya Dhere Reviewed-by: Nevenko Stupar Signed-off-by: Jerry Zuo Signed-off-by: Alvin Lee Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin

drm/amd/display: Skip finding free audio for unknown engine_id

2024-07-11T10:49:05+00:00

[ Upstream commit 1357b2165d9ad94faa4c4a20d5e2ce29c2ff29c3 ] [WHY] ENGINE_ID_UNKNOWN = -1 and can not be used as an array index. Plus, it also means it is uninitialized and does not need free audio. [HOW] Skip and return NULL. This fixes 2 OVERRUN issues reported by Coverity. Reviewed-by: Rodrigo Siqueira Acked-by: Wayne Lin Signed-off-by: Alex Hung Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin

drm/amd/display: Check pipe offset before setting vblank

2024-07-11T10:49:05+00:00

[ Upstream commit 5396a70e8cf462ec5ccf2dc8de103c79de9489e6 ] pipe_ctx has a size of MAX_PIPES so checking its index before accessing the array. This fixes an OVERRUN issue reported by Coverity. Reviewed-by: Rodrigo Siqueira Acked-by: Wayne Lin Signed-off-by: Alex Hung Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin

drm/amd/display: Send DP_TOTAL_LTTPR_CNT during detection if LTTPR is present

2024-07-05T07:34:03+00:00

commit 2ec6c7f802332d1eff16f03e7c757f1543ee1183 upstream. [WHY] New register field added in DP2.1 SCR, needed for auxless ALPM [HOW] Echo value read from 0xF0007 back to sink Reviewed-by: Wenjing Liu Cc: Mario Limonciello Cc: Alex Deucher Cc: stable@vger.kernel.org Signed-off-by: Alex Hung Signed-off-by: Michael Strauss Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher Signed-off-by: Greg Kroah-Hartman

drm/amd/display: Revert Remove pixle rate limit for subvp

2024-06-12T09:12:34+00:00

[ Upstream commit cf8c498694a443e28dc1222f3ab94677114a4724 ] This reverts commit 340383c734f8 ("drm/amd/display: Remove pixle rate limit for subvp") [why] The original commit causes a regression when subvp is applied on ODM required 8k60hz timing. The display shows black screen on boot. The issue can be recovered with hotplug. It also causes MPO to fail. We will temprarily revert this commit and investigate the root cause further. Cc: Mario Limonciello Cc: Alex Deucher Cc: stable@vger.kernel.org Reviewed-by: Chaitanya Dhere Reviewed-by: Martin Leung Acked-by: Wayne Lin Signed-off-by: Wenjing Liu Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin

drm/amd/display: Remove pixle rate limit for subvp

2024-06-12T09:12:34+00:00

[ Upstream commit 340383c734f8a4e1663d26356b35fd8050851168 ] Subvp bugs related to 8K60 have been fixed, so remove the limit that blocks 8K60 timings from enabling SubVP. Reviewed-by: Nevenko Stupar Reviewed-by: Chaitanya Dhere Acked-by: Rodrigo Siqueira Tested-by: Daniel Wheeler Signed-off-by: Alvin Lee Signed-off-by: Alex Deucher Stable-dep-of: cf8c498694a4 ("drm/amd/display: Revert Remove pixle rate limit for subvp") Signed-off-by: Sasha Levin

drm/amd/display: Fix potential index out of bounds in color transformation function

2024-06-12T09:11:57+00:00

[ Upstream commit 63ae548f1054a0b71678d0349c7dc9628ddd42ca ] Fixes index out of bounds issue in the color transformation function. The issue could occur when the index 'i' exceeds the number of transfer function points (TRANSFER_FUNC_POINTS). The fix adds a check to ensure 'i' is within bounds before accessing the transfer function points. If 'i' is out of bounds, an error message is logged and the function returns false to indicate an error. Reported by smatch: drivers/gpu/drm/amd/amdgpu/../display/dc/dcn10/dcn10_cm_common.c:405 cm_helper_translate_curve_to_hw_format() error: buffer overflow 'output_tf->tf_pts.red' 1025 <= s32max drivers/gpu/drm/amd/amdgpu/../display/dc/dcn10/dcn10_cm_common.c:406 cm_helper_translate_curve_to_hw_format() error: buffer overflow 'output_tf->tf_pts.green' 1025 <= s32max drivers/gpu/drm/amd/amdgpu/../display/dc/dcn10/dcn10_cm_common.c:407 cm_helper_translate_curve_to_hw_format() error: buffer overflow 'output_tf->tf_pts.blue' 1025 <= s32max Fixes: b629596072e5 ("drm/amd/display: Build unity lut for shaper") Cc: Vitaly Prosyak Cc: Charlene Liu Cc: Harry Wentland Cc: Rodrigo Siqueira Cc: Roman Li Cc: Aurabindo Pillai Cc: Tom Chung Signed-off-by: Srinivasan Shanmugam Reviewed-by: Tom Chung Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin

drm/amd/display: Disable seamless boot on 128b/132b encoding

2024-06-12T09:11:29+00:00

[ Upstream commit 6f0c228ed9184287031a66b46a79e5a3d2e73a86 ] [why] preOS will not support display mode programming and link training for UHBR rates. [how] If we detect a sink that's UHBR capable, disable seamless boot Reviewed-by: Anthony Koo Acked-by: Wayne Lin Signed-off-by: Sung Joon Kim Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin