kernel/linux.git/drivers/gpu/drm/amd/display/dc/virtual, branch v6.12.80

Revert "drm/amd/display: Move setup_stream_attribute"

2025-12-06T21:24:57+00:00

commit 3126c9ccb4373d8758733c6699ba5ab93dbe5c9d upstream. This reverts commit 2681bf4ae8d24df950138b8c9ea9c271cd62e414. This results in a blank screen on the HDMI port on some systems. Revert for now so as not to regress 6.18, can be addressed in 6.19 once the issue is root caused. Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/4652 Cc: Sunpeng.Li@amd.com Cc: ivan.lipski@amd.com Signed-off-by: Alex Deucher (cherry picked from commit d0e9de7a81503cdde37fb2d37f1d102f9e0f38fb) Signed-off-by: Greg Kroah-Hartman

drm/amd/display: Move setup_stream_attribute

2025-11-13T20:34:09+00:00

[ Upstream commit 2681bf4ae8d24df950138b8c9ea9c271cd62e414 ] [WHY] If symclk RCO is enabled, stream encoder may not be receiving an ungated clock by the time we attempt to set stream attributes when setting dpms on. Since the clock is gated, register writes to the stream encoder fail. [HOW] Move set_stream_attribute call into enable_stream, just after the point where symclk32_se is ungated. Logically there is no need to set stream attributes as early as is currently done in link_set_dpms_on, so this should have no impact beyond the RCO fix. Reviewed-by: Ovidiu (Ovi) Bunea Signed-off-by: Michael Strauss Signed-off-by: Ivan Lipski Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher Signed-off-by: Sasha Levin

drm/amd/display: make virtual_disable_link_output static

2022-10-11T15:32:59+00:00

It's not used outside of virtual_link_hwss.c. Fixes a -Wmissing-prototypes warning. Reviewed-by: Harry Wentland Signed-off-by: Alex Deucher

drm/amd/display: rework recent update PHY state commit

2022-09-19T19:10:24+00:00

[why] Original change 594b237b9a07 ("drm/amd/display: Add interface to track PHY state") was implemented by assuming stream's dpms off is equivalent to PHY power off. This assumption doesn't hold in following situations: 1. MST multiple stream scenario, where multiple streams are sharing the same PHY output. Toggle dpms off for one of the stream doesn't power off the PHY due to the presence of other streams. 2. enable stream failure scenario, where enable stream fails due to failure of link training. This will cause DPMS off is set to false, while the actual PHY power state is off in certain cases. Due to the problematic assumption, the logic will skip disabling other streams for MST multiple stream scenario, therefore PHY is not actually powered off. [how] 1. Rework this refactor by moving PHY state update down to hardware level, where we update PHY state in place when hardware sequencer is actually changing the power state of the PHY hardware. 2. Reimplement symclk on TX off workaround in place when we are actually calling transmitter control to power off PHY in dcn32. Note the workaround is added due to the lack of proper software interface to set TX while keeping symclk on. We plan to address this interface problem so we can set TX off only without affecting symclk in future dcn versions. Fixes: 594b237b9a07 ("drm/amd/display: Add interface to track PHY state") Reviewed-by: Jun Lei Acked-by: Wayne Lin Signed-off-by: Wenjing Liu Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: Move all linux includes into OS types

2022-07-05T20:16:49+00:00

Move all linux includes into OS types. Acked-by: Alan Liu Signed-off-by: Harry Wentland Tested-by: Daniel Wheeler Signed-off-by: Alex Deucher

drm/amd/display: add virtual_setup_stream_attribute decl to header

2022-04-19T17:58:32+00:00

Smatch reports this issue virtual_link_hwss.c:32:6: warning: symbol 'virtual_setup_stream_attribute' was not declared. Should it be static? virtual_setup_stream_attribute is only used in virtual_link_hwss.c, but the other functions in the file are declared in the header file and used elsewhere. For consistency, add the virtual_setup_stream_attribute decl to virtual_link_hwss.h. Signed-off-by: Tom Rix 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: 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

drm/amd/display: add set dp lane settings to link_hwss

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

[why] Factor set dp lane settings to link_hwss. v2: fix statement with no effect warning (Alex) Tested-by: Daniel Wheeler Reviewed-by: Jun Lei Acked-by: Stylon Wang Signed-off-by: Wenjing Liu Signed-off-by: Alex Deucher

drm/amd/display: Fix issue with dynamic bpp change for DCN3x

2021-09-23T19:17:30+00:00

Why: Screen sometimes would have artifacts or blink once at the time when bpp is dynamically changed. How: 1. Changed to update PPS infopacket in frame mode instead of immediate mode since other updates for bpp change are double-buffered. 2. Changed double-buffering enablement programming for DCN30 as advised by ASIC team Reviewed-by: Wenjing Liu Acked-by: Rodrigo Siqueira Signed-off-by: Bing Guo Signed-off-by: Alex Deucher