kernel/linux.git/drivers/gpu/drm/amd/display/dc/link, branch v6.4

drm/amd/display: limit DPIA link rate to HBR3

2023-06-13T21:16:35+00:00

[Why] DPIA doesn't support UHBR, driver should not enable UHBR for dp tunneling [How] limit DPIA link rate to HBR3 Cc: Mario Limonciello Cc: Alex Deucher Cc: stable@vger.kernel.org Acked-by: Stylon Wang Signed-off-by: Peichen Huang Reviewed-by: Mustapha Ghaddar Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: enable dpia validate

2023-05-18T13:58:35+00:00

Use dpia_validate_usb4_bw() function Fixes: a8b537605e22 ("drm/amd/display: Add function pointer for validate bw usb4") Reviewed-by: Roman Li Reviewed-by: Meenakshikumar Somasundaram Acked-by: Aurabindo Pillai Signed-off-by: Mustapha Ghaddar Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Improvement for handling edp link training fails

2023-04-27T02:35:02+00:00

[Why] The eDP retrain will cause the DPCD 300 to be reset to default. And cause the brightness can't be set correctly. [How] delete the call to edp panel power control in both enable_link_output/disable_link_output entirely and only call edp panel control in enable_link_dp and disable_link_dp once. Reviewed-by: Charlene Liu Acked-by: Qingqing Zhuo Signed-off-by: Jingwen Zhu Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Apply correct panel mode when reinitializing hardware

2023-04-27T02:34:29+00:00

[Why] When link training during engine recovery, ASSR might fail causing panel mode to be reset to default. This should not happen for eDP as it will prevent the panel from turning back on. [How] Added dp_panel_mode to struct dc_link to remember previously applied panel mode. Do not reset panel mode to default while performing link training if previously used panel mode = eDP. Reviewed-by: Nicholas Kazlauskas Acked-by: Qingqing Zhuo Signed-off-by: Michael Mityushkin Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Add logging when DP link training Clock recovery is Successful

2023-04-14T17:47:49+00:00

Log when Clock recovery is successful, as part of DP link training process. Cc: Aurabindo Pillai Cc: Fangzhi Zuo Signed-off-by: Srinivasan Shanmugam Reviewed-by: Aurabindo Pillai Signed-off-by: Alex Deucher

drm/amd/display: Add logging when setting DP sink power state fails

2023-04-14T17:47:49+00:00

Log if we fail to setup sink power states. Cc: Fangzhi Zuo Cc: Aurabindo Pillai Signed-off-by: Srinivasan Shanmugam Reviewed-by: Aurabindo Pillai Signed-off-by: Alex Deucher

drm/amd/display: Add logging for DP link traning Test Pattern Seqeunces

2023-04-11T22:03:45+00:00

Add some more logging for DP link traning test pattern seqeunces for better debugging. Cc: Fangzhi Zuo Cc: Harry Wentland Cc: Leo Li Cc: Alex Deucher Signed-off-by: Srinivasan Shanmugam Reviewed-by: Fangzhi Zuo Signed-off-by: Alex Deucher

drm/amd/display : Log DP link training downspread info

2023-04-11T22:03:45+00:00

Update the existing log with DP LT downspread info: [Downstream devices shall support down spreading of the link clock. The down-spread amplitude shall either be disabled (0.0%) or up to 0.5%, as written by the upstream device to the DOWNSPREAD_CTRL register (DPCD 00107h). The modulation frequency range shall be 30 to 33 kHz] Besides, fix checkpatch warning: CHECK: Alignment should match open parenthesis Cc: Mario Limonciello Cc: Harry Wentland Cc: Leo Li Cc: Alex Deucher Signed-off-by: Srinivasan Shanmugam Reviewed-by: Aurabindo Pillai Signed-off-by: Alex Deucher

drm/amd/display: Improve robustness of FIXED_VS link training at DP1 rates

2023-04-11T22:03:43+00:00

[WHY] New sequence for transparent mode DP1.x link training was provided by LTTPR vendor [HOW] Implement new FIXED_VS sequence, increase LT retry count to minimize any potential intermittent lightup failures Reviewed-by: Jun Lei Acked-by: Qingqing Zhuo Signed-off-by: Michael Strauss Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: skip CLEAR_PAYLOAD_ID_TABLE if device mst_en is 0

2023-03-31T15:18:54+00:00

[Why] Some dock and mst monitor don't like to receive CLEAR_PAYLOAD_ID_TABLE when mst_en is set to 0. It doesn't make sense to do so in source side, either. [How] Don't send CLEAR_PAYLOAD_ID_TABLE if mst_en is 0 Reviewed-by: George Shen Acked-by: Qingqing Zhuo Signed-off-by: Peichen Huang Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher