drm/amd/powerplay: add vega20 pre_display_config_changed callback

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fix possible handshake hang and video playback crash

Corner cases:
 - Handshake between SMU and DCE causes hangs when CRTC is not
   enabled
 - System crash occurs when starting 4K playback with Movies and TV
   in an SLS configuration

Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Evan Quan 2018-05-09 11:14:06 +08:00 • committed by Alex Deucher

parent b8497699ef

commit 8dd97d6bc2

1 changed files with 41 additions and 0 deletions

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drivers/gpu/drm/amd/powerplay/hwmgr/vega20_hwmgr.c

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