drm/amd/display: Debug-print reason for mode validation failure

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>

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 a7d8634..29bab3e 100644 (file)
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -2839,10 +2839,11 @@ int amdgpu_dm_connector_mode_valid(struct drm_connector *connector,
        if (dc_result == DC_OK)
                result = MODE_OK;
        else
-               DRM_DEBUG_KMS("Mode %dx%d (clk %d) failed DC validation\n",
+               DRM_DEBUG_KMS("Mode %dx%d (clk %d) failed DC validation with error %d\n",
                              mode->vdisplay,
                              mode->hdisplay,
-                             mode->clock);
+                             mode->clock,
+                             dc_result);
 
        dc_stream_release(stream);