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drm/amd/display: fix crash with modesetting driver

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They might call commit with ACTION_NOTHING without a mode.
We shouldn't crash but simply skip updating stream scaling
settings since scaling obviously didn't change without a
provided mode.

Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Reviewed-by: Andrey Grodzovsky <Andrey.Grodzovsky@amd.com>
Acked-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Harry Wentland 2017-02-03 11:45:43 -05:00 committed by Alex Deucher
parent 94cd1f79b0
commit f7f3cfee08
1 changed files with 4 additions and 0 deletions
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4
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_types.c
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@ -638,6 +638,10 @@ static void update_stream_scaling_settings(
struct rect src = { 0 }; /* viewport in composition space*/
struct rect dst = { 0 }; /* stream addressable area */
/* no mode. nothing to be done */
if (!mode)
return;
/* Full screen scaling by default */
src.width = mode->hdisplay;
src.height = mode->vdisplay;