drm/amd/display: Mask DPCD field to avoid reading unsupported field value

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[Why]
DSC will be disabled if DPCD 0006F[6:3] is set to a non-zero value
because bits 6:3 are not currently supported. When 6:3 is populated, an
unsupported INCREMENT OF bits_per_pixel value is read (DPCD 0006F[2:0])

[How]
Mask the INCREMENT OF bits_per_pixel field so that values in the
unsupported field are ignored.

Signed-off-by: Jaehyun Chung <jaehyun.chung@amd.com>
Reviewed-by: Wenjing Liu <Wenjing.Liu@amd.com>
Acked-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Jaehyun Chung 2020-08-05 17:28:53 -04:00 • committed by Alex Deucher

parent 5ab7943187

commit e0f7ff99c9

1 changed files with 3 additions and 1 deletions

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drivers/gpu/drm/amd/display/dc/dsc/dc_dsc.c

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