drm/i915: Dump failed crtc states during atomic check

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@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190517193132.8140-12-ville.syrjala@linux.intel.com
Reviewed-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 048cb8d..240e5f1 100644 (file)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -13369,7 +13369,7 @@ 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) {
@@ -13382,12 +13382,8 @@ 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)) {
@@ -13401,32 +13397,32 @@ 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;
 
        ret = intel_bw_atomic_check(state);
        if (ret)
-               return ret;
+               goto fail;
 
        for_each_oldnew_intel_crtc_in_state(state, crtc, old_crtc_state,
                                            new_crtc_state, i) {
@@ -13440,6 +13436,20 @@ 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,