kernel/linux.git/drivers/gpu/drm/amd/display/dc, branch v5.16.1

drm/amd/display: Changed pipe split policy to allow for multi-display pipe split

2021-12-28T22:02:31+00:00

[WHY] Current implementation of pipe split policy prevents pipe split with multiple displays connected, which caused the MCLK speed to be stuck at max [HOW] Changed the pipe split policies so that pipe split is allowed for multi-display configurations Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1522 Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1709 Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1655 Bug: https://gitlab.freedesktop.org/drm/amd/-/issues/1403 Note this is a backport of this commit from amdgpu drm-next for 5.16. Tested-by: Daniel Wheeler Reviewed-by: Aric Cyr Acked-by: Rodrigo Siqueira Signed-off-by: Angus Wang Signed-off-by: Alex Deucher Cc: stable@vger.kernel.org

drm/amd/display: Fix USB4 null pointer dereference in update_psp_stream_config

2021-12-28T21:51:24+00:00

[Why] A porting error on a previous patch left the block of code that causes the crash from a NULL pointer dereference. More specifically, we try to access link_enc before it's assigned in the USB4 case in the following assignment: config.dio_output_idx = link_enc->transmitter - TRANSMITTER_UNIPHY_A; [How] That assignment occurs later depending on the ASIC version. It's only needed on DCN31 and only after link_enc is already assigned. Fixes: 986430446c917b ("drm/amd/display: fix a crash on USB4 over C20 PHY") Reviewed-by: Harry Wentland Signed-off-by: Nicholas Kazlauskas Signed-off-by: Alex Deucher

drm/amd/display: Set optimize_pwr_state for DCN31

2021-12-28T21:51:24+00:00

[Why] We'll exit optimized power state to do link detection but we won't enter back into the optimized power state. This could potentially block s2idle entry depending on the sequencing, but it also means we're losing some power during the transition period. [How] Hook up the handler like DCN21. It was also missed like the exit_optimized_pwr_state callback. Fixes: 64b1d0e8d500 ("drm/amd/display: Add DCN3.1 HWSEQ") Tested-by: Daniel Wheeler Reviewed-by: Eric Yang Acked-by: Rodrigo Siqueira Signed-off-by: Nicholas Kazlauskas Signed-off-by: Alex Deucher

drm/amd/display: Send s0i2_rdy in stream_count == 0 optimization

2021-12-28T21:51:24+00:00

[Why] Otherwise SMU won't mark Display as idle when trying to perform s2idle. [How] Mark the bit in the dcn31 codepath, doesn't apply to older ASIC. It needed to be split from phy refclk off to prevent entering s2idle when PSR was engaged but driver was not ready. Fixes: 118a33151658 ("drm/amd/display: Add DCN3.1 clock manager support") Tested-by: Daniel Wheeler Reviewed-by: Eric Yang Acked-by: Rodrigo Siqueira Signed-off-by: Nicholas Kazlauskas Signed-off-by: Alex Deucher

drm/amd/display: Added power down for DCN10

2021-12-28T21:51:24+00:00

[Why] The change of setting a timer callback on boot for 10 seconds is still working, just lacked power down for DCN10. [How] Added power down for DCN10. Tested-by: Daniel Wheeler Reviewed-by: Anthony Koo Acked-by: Rodrigo Siqueira Signed-off-by: Derek Lai Signed-off-by: Alex Deucher

drm/amd/display: fix B0 TMDS deepcolor no dislay issue

2021-12-28T21:51:24+00:00

[why] B0 PHY C map to F, D map to G driver use logic instance, dmub does the remap. Driver still need use the right PHY instance to access right HW. [how] use phyical instance when program PHY register. [note] could move resync_control programming to dmub next. Tested-by: Daniel Wheeler Reviewed-by: Dmytro Laktyushkin Reviewed-by: Jun Lei Acked-by: Rodrigo Siqueira Signed-off-by: Charlene Liu Signed-off-by: Alex Deucher

drm/amd/display: Set exit_optimized_pwr_state for DCN31

2021-12-14T22:53:26+00:00

[Why] SMU now respects the PHY refclk disable request from driver. This causes a hang during hotplug when PHY refclk was disabled because it's not being re-enabled and the transmitter control starts on dc_link_detect. [How] We normally would re-enable the clk with exit_optimized_pwr_state but this is only set on DCN21 and DCN301. Set it for dcn31 as well. This fixes DMCUB timeouts in the PHY. Fixes: 64b1d0e8d500 ("drm/amd/display: Add DCN3.1 HWSEQ") Reviewed-by: Eric Yang Acked-by: Pavle Kotarac Tested-by: Daniel Wheeler Signed-off-by: Nicholas Kazlauskas Signed-off-by: Alex Deucher

drm/amd/display: prevent reading unitialized links

2021-12-09T04:24:08+00:00

[why/how] The function can be called on boot or after suspend when links are not initialized, to prevent it guard it with NULL pointer check Reviewed-by: Nicholas Kazlauskas Acked-by: Pavle Kotarac Signed-off-by: Mikita Lipski Signed-off-by: Alex Deucher

drm/amd/display: Add work around for tunneled MST.

2021-12-01T22:06:38+00:00

[Why] Certain USB4 docks do not seem to be able to handle disabling DSC once it has been enabled on an MST stream. This can result in blank displays. [How] As a work around, always enable DSC on docks exhibiting this issue. The flag to indicate the use of DSC for MST streams on a USB4 dock is set during detection of the dock and only cleared when the USB4 dock is disconnected. Reviewed-by: Jun Lei Reviewed-by: Aric Cyr Acked-by: Bhawanpreet Lakha Signed-off-by: Jimmy Kizito Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Fix for the no Audio bug with Tiled Displays

2021-12-01T22:06:06+00:00

[WHY] It seems like after a series of plug/unplugs we end up in a situation where tiled display doesnt support Audio. [HOW] The issue seems to be related to when we check streams changed after an HPD, we should be checking the audio_struct as well to see if any of its values changed. Reviewed-by: Jun Lei Acked-by: Bhawanpreet Lakha Signed-off-by: Mustapha Ghaddar Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher