drm/amd/display: optionally optimize edp link rate based on timing

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[Why]
eDP v1.4 allows panels to report link rates other than RBR/HBR/HBR2, that
may be more optimal for the panel's timing. Power can be saved by using
a link rate closer to the required bandwidth of the panel's timing.

[How]
Scan the table of reported link rates from the panel, and select the
minimum link rate that satisfies the bandwidth requirements of the panel's
timing. Include a flag to make the feature optional.

Signed-off-by: Josip Pavic <Josip.Pavic@amd.com>
Reviewed-by: Harry Wentland <Harry.Wentland@amd.com>
Acked-by: Anthony Koo <Anthony.Koo@amd.com>
Acked-by: Leo Li <sunpeng.li@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

...

This commit is contained in:

Josip Pavic 2019-02-05 19:27:38 -05:00 • committed by Alex Deucher

parent 33e0a44583

commit 8628d02f60

3 changed files with 140 additions and 63 deletions

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199

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

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6

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

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2

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

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