linux-stable.git/drivers/gpu/drm/amd/display/dc/link, branch linux-6.0.y

drm/amd/display: Fix DCN32 DPSTREAMCLK_CNTL programming

2022-08-30T20:57:23+00:00

[Why]
Each index in the DPSTREAMCLK_CNTL register
phyiscally maps 1-to-1 with HPO stream encoder
instance. On the other hand, each index in
DTBCLK_P_CNTL physically maps 1-to-1 with OTG
instance.

Current DCN32 DPSTREAMCLK_CLK programing assumes
that OTG instance always maps 1-to-1 with
HPO stream encoder instance. This is not always
guaranteed and can result in blackscreen.

[How]
Program the correct dpstreamclk instance with
the correct dtbclk_p source.

Reviewed-by: Ariel Bernstein 
Acked-by: Brian Chang 
Signed-off-by: George Shen 
Tested-by: Daniel Wheeler 
Signed-off-by: Alex Deucher

drm/amd/display: Fix dpstreamclk programming

2022-07-25T21:17:10+00:00

[WHY]
Currently programming incorrect hpo inst as well as selecting incorrect source

[HOW]
Use hpo inst instead of otg inst to select dpstreamclk inst

Reviewed-by: Nicholas Kazlauskas 
Acked-by: Alex Hung 
Signed-off-by: Michael Strauss 
Tested-by: Daniel Wheeler 
Signed-off-by: Alex Deucher

drm/amd/display: Add enable/disable FIFO callbacks to stream setup

2022-07-25T21:14:50+00:00

[Why]
We don't write out attributes after disabling and re-enabling the link
on some monitors, causing some, but not all, HDMI displays to fail to
lightup on DCN314.

[How]
Firmware used to do this after DIG link setup.

Since firmware is no longer doing this to support USB4 and dynamic link
remapping we'll need to add this to driver in the equivalent paths.

New optional callbacks were created in the stream encoder interface and
implementations were added for DCN314.

Reviewed-by: Michael Strauss 
Acked-by: Alex Hung 
Signed-off-by: Nicholas Kazlauskas 
Tested-by: Daniel Wheeler 
Signed-off-by: Alex Deucher

drm/amd/display: revert Blank eDP on disable/enable drv

2022-06-01T19:56:48+00:00

why and how:
Revert this change. It was causing a black screen with certain blocks

Reviewed-by: George Shen 
Acked-by: Jasdeep Dhillon 
Tested-by: Daniel Wheeler 
Signed-off-by: Leung, Martin 
Signed-off-by: Alex Deucher

drm/amd/display: extract update stream allocation to link_hwss

2022-04-13T13:14:22+00:00

[why]
Extract update stream allocation table into link hwss as part of the
link hwss refactor work.

Reviewed-by: George Shen 
Reviewed-by: Fangzhi Zuo 
Acked-by: Pavle Kotarac 
Signed-off-by: Wenjing Liu 
Signed-off-by: Alex Deucher

drm/amd/display: Move link_trace for edp to dp_trace

2022-04-05T14:29:48+00:00

[Why & How]
The dp_trace structure is self contained component designed for
all dp trace, and the edp link trace should be a part of it;

Suggested-by: Wenjing Liu 

Tested-by: Daniel Wheeler 
Reviewed-by: Wenjing Liu 
Reviewed-by: Charlene Liu 
Acked-by: Tom Chung 
Signed-off-by: Leo (Hanghong) Ma 
Signed-off-by: Alex Deucher

drm/amd/display: extract set stream attribute to link_hwss

2022-04-05T14:29:48+00:00

[why]
Extract set stream attribute into link_hwss as part of the link hwss
refactor work.

Tested-by: Daniel Wheeler 
Reviewed-by: George Shen 
Acked-by: Tom Chung 
Signed-off-by: Wenjing Liu 
Signed-off-by: Alex Deucher

drm/amd/display: Add link dp trace support

2022-03-15T18:25:15+00:00

[Why]
It is nice to have link training and link loss status logging in
our trace, and this patch add the all necessary accessors in dc
side.

[How]
1. Define dp_trace struct and create new file link_dp_trace.c and
link_dp_trace.h;
2. Add dp link training status update in dc_link_dp.c;

Reviewed-by: Wenjing Liu 
Acked-by: Alan Liu 
Signed-off-by: Leo (Hanghong) Ma 
Tested-by: Daniel Wheeler 
Signed-off-by: Alex Deucher

drm/amd/display: move link_hwss to link folder and break down to files

2022-02-02T23:26:32+00:00

[why]
Move link_hwss to its own folder as part of DC LIB and break it down
to separate file one for each type of backend for code isolation.

Tested-by: Daniel Wheeler 
Reviewed-by: Jun Lei 
Acked-by: Stylon Wang 
Signed-off-by: Wenjing Liu 
Signed-off-by: Alex Deucher