drm/amd/display: Change disable backlight ramp change threshold from 0 to maximum value.

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Instead of user set brightness with range of percentage,
HLK test set brightness level with range of normal, this will result in
HLK test case set brightness from 0 to 255, DC set brightness with ramp is 0,
and disabled ramp change which will fail the HLK test.
Fix:
In case of unblank stream and turn on edp, change brightness level in
stream to 0xFFFFFFFF(actural maximum level is 0xFF), use that value as
a flag to recogonize this the case of resume from S3.

Signed-off-by: Yongqiang Sun <yongqiang.sun@amd.com>
Reviewed-by: Eric Yang <eric.yang2@amd.com>
Acked-by: Harry Wentland <harry.wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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This commit is contained in:

Yongqiang Sun 2018-03-27 10:05:10 -04:00 • committed by Alex Deucher

parent 8f121fe281

commit 5282cbe32e

3 changed files with 4 additions and 2 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

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2

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

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2

drivers/gpu/drm/amd/display/dc/dce110/dce110_hw_sequencer.c

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2

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

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