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drm/amd/display: Debug print when validate_stream fails 

It might be good to understand why validate fails.

Signed-off-by: Harry Wentland <harry.wentland@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:
Harry Wentland 2017-12-07 14:09:15 -05:00 committed by Alex Deucher
parent 25292028d7
commit a39438f0b9
1 changed files with 9 additions and 1 deletions
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10
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@ -2801,6 +2801,7 @@ int amdgpu_dm_connector_mode_valid(struct drm_connector *connector,
/* TODO: Unhardcode stream count */
struct dc_stream_state *stream;
struct amdgpu_dm_connector *aconnector = to_amdgpu_dm_connector(connector);
enum dc_status dc_result = DC_OK;
if ((mode->flags & DRM_MODE_FLAG_INTERLACE) ||
(mode->flags & DRM_MODE_FLAG_DBLSCAN))
@ -2833,8 +2834,15 @@ int amdgpu_dm_connector_mode_valid(struct drm_connector *connector,
stream->src.height = mode->vdisplay;
stream->dst = stream->src;
if (dc_validate_stream(adev->dm.dc, stream) == DC_OK)
dc_result = dc_validate_stream(adev->dm.dc, stream);
if (dc_result == DC_OK)
result = MODE_OK;
else
DRM_DEBUG_KMS("Mode %dx%d (clk %d) failed DC validation\n",
mode->vdisplay,
mode->hdisplay,
mode->clock);
dc_stream_release(stream);