From a39438f0b9261a249da6d5957c03e1fab699f467 Mon Sep 17 00:00:00 2001 From: Harry Wentland Date: Thu, 7 Dec 2017 14:09:15 -0500 Subject: [PATCH] drm/amd/display: Debug print when validate_stream fails It might be good to understand why validate fails. Signed-off-by: Harry Wentland Reviewed-by: Tony Cheng Acked-by: Harry Wentland Signed-off-by: Alex Deucher --- drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 10 +++++++++- 1 file changed, 9 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c index da78ff4..a7d8634 100644 --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c @@ -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); -- 2.7.4