drm/amd/display: Implement work around for optc underflow.

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Work around for a hw bug causing optc underflow if blank data
double buffer disable and remove mpcc.
Checking optc status after otg unlock, after wait mpcc idle
check status again, if optc underflow just happens after wait
mpcc idle, clear underflow status and enable blank data double
buffer.

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

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Yongqiang Sun 2017-11-15 16:21:34 -05:00 • committed by Alex Deucher

parent 82c026d14f

commit 5cc2687c13

5 changed files with 62 additions and 11 deletions

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38

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hw_sequencer.c

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1

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_resource.c

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31

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_timing_generator.c

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2

drivers/gpu/drm/amd/display/dc/inc/hw/timing_generator.h

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1

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

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