[Intel-gfx] [PATCH 12/14] drm/i915: Dump failed crtc states during atomic check

[Ville Syrjala]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

Currently we're only dumping the failed crtc state if
intel_modeset_pipe_config() fails. Let's do the state
dump if anything else fails afterwards. The downside
is that we lose the immediate knowledge which crtc caused
the failure (unless a lower level function indicates it
with an additional debug print) but having the full state
dumped seems like something that could be beneficial.

Signed-off-by: Ville Syrjälä <ville.syrjala at linux.intel.com>
---
 drivers/gpu/drm/i915/intel_display.c | 34 ++++++++++++++++++----------
 1 file changed, 22 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 59b012be9a4f..fe8dc7939529 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -13051,7 +13051,7 @@ static int intel_atomic_check(struct drm_device *dev,
 
 	ret = drm_atomic_helper_check_modeset(dev, &state->base);
 	if (ret)
-		return ret;
+		goto fail;
 
 	for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
 					    new_crtc_state, i) {
@@ -13064,12 +13064,8 @@ static int intel_atomic_check(struct drm_device *dev,
 		}
 
 		ret = intel_modeset_pipe_config(new_crtc_state);
-		if (ret == -EDEADLK)
-			return ret;
-		if (ret) {
-			intel_dump_pipe_config(new_crtc_state, "[failed]");
-			return ret;
-		}
+		if (ret)
+			goto fail;
 
 		if (intel_pipe_config_compare(dev_priv, old_crtc_state,
 					      new_crtc_state, true)) {
@@ -13083,29 +13079,29 @@ static int intel_atomic_check(struct drm_device *dev,
 
 	ret = drm_dp_mst_atomic_check(&state->base);
 	if (ret)
-		return ret;
+		goto fail;
 
 	if (any_ms) {
 		ret = intel_modeset_checks(state);
 		if (ret)
-			return ret;
+			goto fail;
 	} else {
 		state->cdclk.logical = dev_priv->cdclk.logical;
 	}
 
 	ret = icl_add_linked_planes(state);
 	if (ret)
-		return ret;
+		goto fail;
 
 	ret = drm_atomic_helper_check_planes(dev, &state->base);
 	if (ret)
-		return ret;
+		goto fail;
 
 	intel_fbc_choose_crtc(dev_priv, state);
 
 	ret = calc_watermark_data(state);
 	if (ret)
-		return ret;
+		goto fail;
 
 	for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
 					    new_crtc_state, i) {
@@ -13119,6 +13115,20 @@ static int intel_atomic_check(struct drm_device *dev,
 	}
 
 	return 0;
+
+ fail:
+	if (ret == -EDEADLK)
+		return ret;
+
+	/*
+	 * FIXME would probably be nice to know which crtc specifically
+	 * caused the failure, in cases where we can pinpoint it.
+	 */
+	for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
+					    new_crtc_state, i)
+		intel_dump_pipe_config(new_crtc_state, "[failed]");
+
+	return ret;
 }
 
 static int intel_atomic_prepare_commit(struct drm_device *dev,
-- 
2.21.0