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drm/amd/display: Early return when turn off a plane.

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In case of two monitor connected and turn off one of the monitors,
OTG0 is locked after graphic plane off due to redundant programming
front end regs.

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>
This commit is contained in:
Yongqiang Sun 2017-09-22 13:41:13 -04:00 committed by Alex Deucher
parent 69b516c91c
commit 671a6246e0
1 changed files with 7 additions and 1 deletions
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8
drivers/gpu/drm/amd/display/dc/core/dc.c
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@ -1190,8 +1190,14 @@ static void commit_planes_for_stream(struct dc *dc,
}
}
if (surface_count == 0)
if (surface_count == 0) {
/*
* In case of turning off screen, no need to program front end a second time.
* just return after program front end.
*/
dc->hwss.apply_ctx_for_surface(dc, stream, surface_count, context);
return;
}
/* Lock pipes for provided surfaces, or all active if full update*/
for (i = 0; i < surface_count; i++) {