drm/amd/display: Add return value for detect dp.

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System soft hang when hotplug specific 4K DP panel
due to link caps read error and incorrect link setting
parmas to enable dp.
Add status check for DPCD read and add return value
for detect dp, in case of false, return from caller,
avoid further false operation.

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 2018-01-23 11:39:09 -05:00 • committed by Alex Deucher

parent dc75dd707c

commit cdb3979808

3 changed files with 26 additions and 14 deletions

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14

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

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24

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

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2

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

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