kernel/linux.git/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.h, branch v6.3

drm/amd/display: Enable Freesync over PCon

2023-01-31T19:00:44+00:00

[why] Enable Freesync over PCon on Linux environment. [how] Adding Freesync over PCon support in amdgpu_dm - Read DPCD for Freesync over PCon capabilitiy - Add whitelist for compatible branch devices Reviewed-by: Chao-kai Wang Acked-by: Alex Hung Signed-off-by: Sung Joon Kim Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amdgpu/display/mst: adjust the naming of mst_port and port of aconnector

2023-01-24T18:26:12+00:00

[why & how] The term (i.e. port & mst_port) that we used to use in amdgpu is a bit confusing. Rename them to mst_output_port & mst_root respectively. Signed-off-by: Wayne Lin Signed-off-by: Harry Wentland Acked-by: Harry Wentland Reviewed-by: Lyude Paul Signed-off-by: Alex Deucher

drm/amd/display: force connector state when bpc changes during compliance

2023-01-24T17:25:05+00:00

[Why] During DP DSC compliance tests, bpc requested would change between sub-tests, which requires stream to be recommited. [How] Force connector to disconnect and reconnect whenever there is a bpc change in automated test. Reviewed-by: Jerry Zuo Acked-by: Alan Liu Signed-off-by: Qingqing Zhuo Signed-off-by: hersen wu Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Implement multiple secure display

2022-12-15T17:18:18+00:00

[Why] Current secure display only work with single display, now make it work with multiple displays. [How] Create secure_display_context for each crtc instance to store its own Region of Interest (ROI) information. v2: squash in warning fix (Alex) Reviewed-by: Wayne Lin Acked-by: Jasdeep Dhillon Signed-off-by: Alan Liu Signed-off-by: Alex Deucher

drm/amd/display: Fix race condition in DPIA AUX transfer

2022-11-29T16:03:38+00:00

[Why] This fix was intended for improving on coding style but in the process uncovers a race condition, which explains why we are getting incorrect length in DPIA AUX replies. Due to the call path of DPIA AUX going from DC back to DM layer then again into DC and the added complexities on top of current DC AUX implementation, a proper fix to rely on current dc_lock to address the race condition is difficult without a major overhual on how DPIA AUX is implemented. [How] - Add a mutex dpia_aux_lock to protect DPIA AUX transfers - Remove DMUB_ASYNC_TO_SYNC_ACCESS_* codes and rely solely on aux_return_code_type for error reporting and handling - Separate SET_CONFIG from DPIA AUX transfer because they have quiet different processing logic - Remove unnecessary type casting to and from void * type Reviewed-by: Nicholas Kazlauskas Acked-by: Jasdeep Dhillon Signed-off-by: Stylon Wang Signed-off-by: Alex Deucher

drm/amd/display: Fix invalid DPIA AUX reply causing system hang

2022-11-15T16:52:40+00:00

[Why] Some DPIA AUX replies have incorrect data length from original request. This could lead to overwriting of destination buffer if reply length is larger, which could cause invalid access to stack since many destination buffers are declared as local variables. [How] Check for invalid length from DPIA AUX replies and trigger a retry if reply length is not the same as original request. A DRM_WARN() dmesg log is also produced. Reviewed-by: Roman Li Acked-by: Tom Chung Signed-off-by: Stylon Wang Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher Cc: stable@vger.kernel.org # 6.0.x

drm/amd/display: drop vblank_lock from struct amdgpu_display_manager

2022-11-01T15:46:12+00:00

As of commit 09a5df6c444c ("drm/amd/display: Fix multi-display support for idle opt workqueue"), vblank_lock is no longer being used. So, don't init it in amdgpu_dm_init() and remove it from struct amdgpu_display_manager. Reviewed-by: Harry Wentland Signed-off-by: Hamza Mahfooz Signed-off-by: Alex Deucher

drm/amd/display: Don't adjust VRR unnecessarily

2022-09-13T18:33:00+00:00

[why] Do not need to spend time reprogramming DRR if there were no updates to the parameters. [how] Compare the current stream state to the requested one to determine if an update is required. In amdgpu_dm the timing_changed flag is set but never used so can remove it. Similarly, the stream update for VRR is done after dc_commit and should not update its adjust field until after the update is completed. The adjust field is managed by dc_stream_adjust_vmin_vmax and should not be manually updated in amdgpu_dm. Tested-by: Daniel Wheeler Reviewed-by: Anthony Koo Acked-by: Pavle Kotarac Signed-off-by: Aric Cyr Signed-off-by: Alex Deucher

drm/amd/display: Add some extra kernel doc to amdgpu_dm

2022-08-16T22:14:31+00:00

Reviewed-by: Harry Wentland Acked-by: Tom Chung Signed-off-by: Rodrigo Siqueira Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Add tags for indicating mst progress status

2022-07-20T20:04:42+00:00

[Why & How] In order to leverage igt tool to maintain mst feature, expose new debugfs entry "mst_progress_status". In our dm flow, record down the result of each phase of mst and user can examine the mst result by checking whether each phase get completed successfully. Tested-by: Daniel Wheeler Reviewed-by: Hersen Wu Acked-by: Alan Liu Signed-off-by: Wayne Lin Signed-off-by: Alex Deucher