drm/amd/display: Set link rate set if eDP ver >= 1.4.

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[Why]
If eDP ver >= 1.4,
the Source device must use LINK_RATE_SET.

[How]
Get LINK_RATE_SET by reading DPCD 10h-1fh,
then write DPCD 00115h before link training.

Signed-off-by: Derek Lai <Derek.Lai@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Derek Lai 2018-12-11 16:27:09 +08:00 • committed by Alex Deucher

parent 7eb9097541

commit b03a599b3e

3 changed files with 111 additions and 8 deletions

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103

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

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1

drivers/gpu/drm/amd/display/dc/dc.h

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13

drivers/gpu/drm/amd/display/dc/dc_dp_types.h

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