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From 52d86d7cb1b40d3a2fb7a732737649d0c3bf48cd Mon Sep 17 00:00:00 2001
From: Harry Wentland <harry.wentland@amd.com>
Date: Thu, 7 Dec 2017 14:09:15 -0500
Subject: [PATCH 3107/4131] 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>
---
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 4b3e4ec..d75f0d9 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -3107,6 +3107,7 @@ 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))
@@ -3139,8 +3140,15 @@ 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
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