drm/amd/display: Set default bits per channel

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[Why]
Bump into calcReducedBlankingTiming because of mode query failed.
In this function,
timing.displayColorDepth == DISPLAY_COLOR_DEPTH_UNDEFINED.
Then req_bw == 0 because of bits_per_channel == 0.
So decide edp link settings, use default RBRx1 for special timing.

[How]
Set default bits_per_channel is 8.

Signed-off-by: Jing Zhou <Jing.Zhou@amd.com>
Reviewed-by: Aric Cyr <Aric.Cyr@amd.com>
Acked-by: Eryk Brol <eryk.brol@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Jing Zhou 2020-11-16 18:11:08 +08:00 • committed by Alex Deucher

parent 92f1fa0d67

commit 5c8a6c71d7

2 changed files with 14 additions and 5 deletions

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4

drivers/gpu/drm/amd/display/dc/core/dc_link.c

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15

drivers/gpu/drm/amd/display/dc/core/dc_link_dp.c

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