drm/amd/display: Workaround to increase phantom pipe vactive in pipesplit

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[ Upstream commit 5b8f9deaf3 ]

[Why]
Certain high resolution displays exhibit DCC line corruption with SubVP
enabled. This is likely due to insufficient DCC meta data buffered
immediately after the mclk switch.

[How]
Add workaround to increase phantom pipe vactive height by
meta_row_height number of lines, thus increasing the amount of meta data
buffered immediately after mclk switch finishes.

Reviewed-by: Alvin Lee <Alvin.Lee2@amd.com>
Acked-by: Tom Chung <chiahsuan.chung@amd.com>
Signed-off-by: George Shen <george.shen@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

...

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George Shen 2022-11-01 00:16:56 -04:00 • committed by Greg Kroah-Hartman

parent d26364596d

commit 2ed52650a2

1 changed files with 7 additions and 0 deletions

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drivers/gpu/drm/amd/display/dc/dml/dcn32/dcn32_fpu.c

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