kernel/linux.git/drivers/gpu/drm/amd/display/modules/power, branch v7.0-rc7

drm/amd/display: Check NULL before accessing a variable

2026-01-20T22:19:34+00:00

[WHAT] Check NULL before accessing link, not after. This is reported as a REVERSE_INULL error by Coverity. Reviewed-by: Aurabindo Pillai Signed-off-by: Alex Hung Signed-off-by: Matthew Stewart Tested-by: Dan Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Add frame skip feature support flag

2026-01-05T21:59:58+00:00

[WHY] The set_replay_frame_skip_number() function should not execute when the link does not support the Frame Skipping feature. [HOW] Add a new field `frame_skip_supported` to struct replay_config to indicate whether the link supports frame skipping. Check this flag at the beginning of set_replay_frame_skip_number() and return early if the feature is not supported. Reviewed-by: Robin Chen Signed-off-by: ChunTao Tso Signed-off-by: Chenyu Chen Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Add panel replay enablement option and logic

2025-11-18T15:50:06+00:00

[Why&How] 1.Add flow to enable and configure panel replay enablement and configuration 2.Add registry key for enable option 3.Add replay version check to be compatible with freesync replay 4.Add AC/DC switch function to notify ac/dc change. 5.Add flow in set event function to check and decide Replay enable/disable Reviewed-by: Robin Chen Signed-off-by: Jack Chang Signed-off-by: Leon Huang Signed-off-by: Ivan Lipski Tested-by: Dan Wheeler Signed-off-by: Alex Deucher

drm/amd/display: To support Replay frame skip mode

2025-11-12T02:54:15+00:00

[Why & How] The change is to optimize the Replay power saving by reducing the refresh rate with frame skipping mode Reviewed-by: Robin Chen Signed-off-by: Chuntao Tso Signed-off-by: Fangzhi Zuo Tested-by: Dan Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Initial support for SmartMux

2025-07-15T18:07:53+00:00

SmartMux is a mechanism to switch the GPU being used for scanout in a hybrid configuration. This is used for devices with an eDP and two GPUs. This is only valid when the system has a physical switch (Multiplexer) in the board to switch between the two GPUs. When a graphically intensive workload like a game is being run, the system can be switch the active display to the dGPU, so that we can avoid copying the buffer from dGPU to APU for scanout. This helps with latency and FPS. When power consumption is preferred, the system can be switched to the APU. Reviewed-by: Alvin Lee Signed-off-by: Aurabindo Pillai Signed-off-by: Ivan Lipski Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Revised for Replay Pseudo vblank control

2025-01-10T17:11:38+00:00

[why & how] Revised Replay Full screen video Pseudo vblank control. Reviewed-by: Allen Li Signed-off-by: Dennis Chan Signed-off-by: Tom Chung Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Add replay desync error count tracking and reset functionality

2025-01-10T16:59:37+00:00

[Why & How] Build-up get/reset desync error count interface and implement the functions. Reviewed-by: ChunTao Tso Reviewed-by: Robin Chen Signed-off-by: Jack Chang Signed-off-by: Tom Chung Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

Revert "drm/amd/display: Revised for Replay Pseudo vblank"

2024-12-10T15:32:39+00:00

This reverts commit 0f5ac8c8e275 Due to a replay regression. Fixes: 0f5ac8c8e275 ("drm/amd/display: Revised for Replay Pseudo vblank control") Reviewed-by: Dennis Chan Signed-off-by: Gabe Teeger Signed-off-by: Aurabindo Pillai Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Revised for Replay Pseudo vblank control

2024-12-10T15:26:49+00:00

[why] Revised Replay Full screen video Pseudo vblank control. Reviewed-by: ChunTao Tso Signed-off-by: Dennis Chan Signed-off-by: Fangzhi Zuo Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Disable PSR-SU on Parade 08-01 TCON too

2024-10-22T22:13:03+00:00

Stuart Hayhurst has found that both at bootup and fullscreen VA-API video is leading to black screens for around 1 second and kernel WARNING [1] traces when calling dmub_psr_enable() with Parade 08-01 TCON. These symptoms all go away with PSR-SU disabled for this TCON, so disable it for now while DMUB traces [2] from the failure can be analyzed and the failure state properly root caused. Cc: Marc Rossi Cc: Hamza Mahfooz Link: https://gitlab.freedesktop.org/drm/amd/uploads/a832dd515b571ee171b3e3b566e99a13/dmesg.log [1] Link: https://gitlab.freedesktop.org/drm/amd/uploads/8f13ff3b00963c833e23e68aa8116959/output.log [2] Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/2645 Reviewed-by: Leo Li Link: https://lore.kernel.org/r/20240205211233.2601-1-mario.limonciello@amd.com Signed-off-by: Mario Limonciello Signed-off-by: Alex Deucher (cherry picked from commit afb634a6823d8d9db23c5fb04f79c5549349628b) Cc: stable@vger.kernel.org