drm: Add crtc->name and use it in debug messages

Show a sensible name for the crtc in debug mesages. The driver may
supply its own name, otherwise the core genrates the name
("crtc-0", "crtc-1" etc.).

v2: kstrdup() the name passed by the caller (Jani)
v3: Generate a default name if the driver doesn't supply one
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Link: http://patchwork.freedesktop.org/patch/msgid/1449592922-5545-6-git-send-email-ville.syrjala@linux.intel.com

drivers/gpu/drm/drm_atomic.c

@@ -288,8 +288,8 @@ drm_atomic_get_crtc_state(struct drm_atomic_state *state,
 	state->crtcs[index] = crtc;
 	crtc_state->state = state;
 
-	DRM_DEBUG_ATOMIC("Added [CRTC:%d] %p state to %p\n",
-			 crtc->base.id, crtc_state, state);
+	DRM_DEBUG_ATOMIC("Added [CRTC:%d:%s] %p state to %p\n",
+			 crtc->base.id, crtc->name, crtc_state, state);
 
 	return crtc_state;
 }
@@ -486,8 +486,8 @@ static int drm_atomic_crtc_check(struct drm_crtc *crtc,
 	 */
 
 	if (state->active && !state->enable) {
-		DRM_DEBUG_ATOMIC("[CRTC:%d] active without enabled\n",
-				 crtc->base.id);
+		DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active without enabled\n",
+				 crtc->base.id, crtc->name);
 		return -EINVAL;
 	}
 
@@ -496,15 +496,15 @@ static int drm_atomic_crtc_check(struct drm_crtc *crtc,
 	 * be able to trigger. */
 	if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
 	    WARN_ON(state->enable && !state->mode_blob)) {
-		DRM_DEBUG_ATOMIC("[CRTC:%d] enabled without mode blob\n",
-				 crtc->base.id);
+		DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled without mode blob\n",
+				 crtc->base.id, crtc->name);
 		return -EINVAL;
 	}
 
 	if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) &&
 	    WARN_ON(!state->enable && state->mode_blob)) {
-		DRM_DEBUG_ATOMIC("[CRTC:%d] disabled with mode blob\n",
-				 crtc->base.id);
+		DRM_DEBUG_ATOMIC("[CRTC:%d:%s] disabled with mode blob\n",
+				 crtc->base.id, crtc->name);
 		return -EINVAL;
 	}
 
@@ -1004,8 +1004,8 @@ drm_atomic_set_crtc_for_plane(struct drm_plane_state *plane_state,
 	}
 
 	if (crtc)
-		DRM_DEBUG_ATOMIC("Link plane state %p to [CRTC:%d]\n",
-				 plane_state, crtc->base.id);
+		DRM_DEBUG_ATOMIC("Link plane state %p to [CRTC:%d:%s]\n",
+				 plane_state, crtc->base.id, crtc->name);
 	else
 		DRM_DEBUG_ATOMIC("Link plane state %p to [NOCRTC]\n",
 				 plane_state);
@@ -1072,8 +1072,8 @@ drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state,
 	conn_state->crtc = crtc;
 
 	if (crtc)
-		DRM_DEBUG_ATOMIC("Link connector state %p to [CRTC:%d]\n",
-				 conn_state, crtc->base.id);
+		DRM_DEBUG_ATOMIC("Link connector state %p to [CRTC:%d:%s]\n",
+				 conn_state, crtc->base.id, crtc->name);
 	else
 		DRM_DEBUG_ATOMIC("Link connector state %p to [NOCRTC]\n",
 				 conn_state);
@@ -1112,8 +1112,8 @@ drm_atomic_add_affected_connectors(struct drm_atomic_state *state,
 	if (ret)
 		return ret;
 
-	DRM_DEBUG_ATOMIC("Adding all current connectors for [CRTC:%d] to %p\n",
-			 crtc->base.id, state);
+	DRM_DEBUG_ATOMIC("Adding all current connectors for [CRTC:%d:%s] to %p\n",
+			 crtc->base.id, crtc->name, state);
 
 	/*
 	 * Changed connectors are already in @state, so only need to look at the
@@ -1193,8 +1193,9 @@ drm_atomic_connectors_for_crtc(struct drm_atomic_state *state,
 			num_connected_connectors++;
 	}
 
-	DRM_DEBUG_ATOMIC("State %p has %i connectors for [CRTC:%d]\n",
-			 state, num_connected_connectors, crtc->base.id);
+	DRM_DEBUG_ATOMIC("State %p has %i connectors for [CRTC:%d:%s]\n",
+			 state, num_connected_connectors,
+			 crtc->base.id, crtc->name);
 
 	return num_connected_connectors;
 }
@@ -1256,8 +1257,8 @@ int drm_atomic_check_only(struct drm_atomic_state *state)
 	for_each_crtc_in_state(state, crtc, crtc_state, i) {
 		ret = drm_atomic_crtc_check(crtc, crtc_state);
 		if (ret) {
-			DRM_DEBUG_ATOMIC("[CRTC:%d] atomic core check failed\n",
-					 crtc->base.id);
+			DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic core check failed\n",
+					 crtc->base.id, crtc->name);
 			return ret;
 		}
 	}
@@ -1268,8 +1269,8 @@ int drm_atomic_check_only(struct drm_atomic_state *state)
 	if (!state->allow_modeset) {
 		for_each_crtc_in_state(state, crtc, crtc_state, i) {
 			if (drm_atomic_crtc_needs_modeset(crtc_state)) {
-				DRM_DEBUG_ATOMIC("[CRTC:%d] requires full modeset\n",
-						 crtc->base.id);
+				DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requires full modeset\n",
+						 crtc->base.id, crtc->name);
 				return -EINVAL;
 			}
 		}

drivers/gpu/drm/drm_atomic_helper.c

@@ -143,9 +143,9 @@ steal_encoder(struct drm_atomic_state *state,
 	 */
 	WARN_ON(!drm_modeset_is_locked(&config->connection_mutex));
 
-	DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d], stealing it\n",
+	DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s], stealing it\n",
 			 encoder->base.id, encoder->name,
-			 encoder_crtc->base.id);
+			 encoder_crtc->base.id, encoder_crtc->name);
 
 	crtc_state = drm_atomic_get_crtc_state(state, encoder_crtc);
 	if (IS_ERR(crtc_state))
@@ -246,12 +246,13 @@ update_connector_routing(struct drm_atomic_state *state, int conn_idx)
 	}
 
 	if (new_encoder == connector_state->best_encoder) {
-		DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] keeps [ENCODER:%d:%s], now on [CRTC:%d]\n",
+		DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] keeps [ENCODER:%d:%s], now on [CRTC:%d:%s]\n",
 				 connector->base.id,
 				 connector->name,
 				 new_encoder->base.id,
 				 new_encoder->name,
-				 connector_state->crtc->base.id);
+				 connector_state->crtc->base.id,
+				 connector_state->crtc->name);
 
 		return 0;
 	}
@@ -285,12 +286,13 @@ update_connector_routing(struct drm_atomic_state *state, int conn_idx)
 	crtc_state = state->crtc_states[idx];
 	crtc_state->connectors_changed = true;
 
-	DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] using [ENCODER:%d:%s] on [CRTC:%d]\n",
+	DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] using [ENCODER:%d:%s] on [CRTC:%d:%s]\n",
 			 connector->base.id,
 			 connector->name,
 			 new_encoder->base.id,
 			 new_encoder->name,
-			 connector_state->crtc->base.id);
+			 connector_state->crtc->base.id,
+			 connector_state->crtc->name);
 
 	return 0;
 }
@@ -374,8 +376,8 @@ mode_fixup(struct drm_atomic_state *state)
 		ret = funcs->mode_fixup(crtc, &crtc_state->mode,
 					&crtc_state->adjusted_mode);
 		if (!ret) {
-			DRM_DEBUG_ATOMIC("[CRTC:%d] fixup failed\n",
-					 crtc->base.id);
+			DRM_DEBUG_ATOMIC("[CRTC:%d:%s] fixup failed\n",
+					 crtc->base.id, crtc->name);
 			return -EINVAL;
 		}
 	}
@@ -422,14 +424,14 @@ drm_atomic_helper_check_modeset(struct drm_device *dev,
 
 	for_each_crtc_in_state(state, crtc, crtc_state, i) {
 		if (!drm_mode_equal(&crtc->state->mode, &crtc_state->mode)) {
-			DRM_DEBUG_ATOMIC("[CRTC:%d] mode changed\n",
-					 crtc->base.id);
+			DRM_DEBUG_ATOMIC("[CRTC:%d:%s] mode changed\n",
+					 crtc->base.id, crtc->name);
 			crtc_state->mode_changed = true;
 		}
 
 		if (crtc->state->enable != crtc_state->enable) {
-			DRM_DEBUG_ATOMIC("[CRTC:%d] enable changed\n",
-					 crtc->base.id);
+			DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enable changed\n",
+					 crtc->base.id, crtc->name);
 
 			/*
 			 * For clarity this assignment is done here, but
@@ -470,16 +472,16 @@ drm_atomic_helper_check_modeset(struct drm_device *dev,
 		 * a full modeset because update_connector_routing force that.
 		 */
 		if (crtc->state->active != crtc_state->active) {
-			DRM_DEBUG_ATOMIC("[CRTC:%d] active changed\n",
-					 crtc->base.id);
+			DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active changed\n",
+					 crtc->base.id, crtc->name);
 			crtc_state->active_changed = true;
 		}
 
 		if (!drm_atomic_crtc_needs_modeset(crtc_state))
 			continue;
 
-		DRM_DEBUG_ATOMIC("[CRTC:%d] needs all connectors, enable: %c, active: %c\n",
-				 crtc->base.id,
+		DRM_DEBUG_ATOMIC("[CRTC:%d:%s] needs all connectors, enable: %c, active: %c\n",
+				 crtc->base.id, crtc->name,
 				 crtc_state->enable ? 'y' : 'n',
 				 crtc_state->active ? 'y' : 'n');
 
@@ -495,8 +497,8 @@ drm_atomic_helper_check_modeset(struct drm_device *dev,
 								crtc);
 
 		if (crtc_state->enable != !!num_connectors) {
-			DRM_DEBUG_ATOMIC("[CRTC:%d] enabled/connectors mismatch\n",
-					 crtc->base.id);
+			DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled/connectors mismatch\n",
+					 crtc->base.id, crtc->name);
 
 			return -EINVAL;
 		}
@@ -559,8 +561,8 @@ drm_atomic_helper_check_planes(struct drm_device *dev,
 
 		ret = funcs->atomic_check(crtc, state->crtc_states[i]);
 		if (ret) {
-			DRM_DEBUG_ATOMIC("[CRTC:%d] atomic driver check failed\n",
-					 crtc->base.id);
+			DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic driver check failed\n",
+					 crtc->base.id, crtc->name);
 			return ret;
 		}
 	}
@@ -673,8 +675,8 @@ disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state)
 
 		funcs = crtc->helper_private;
 
-		DRM_DEBUG_ATOMIC("disabling [CRTC:%d]\n",
-				 crtc->base.id);
+		DRM_DEBUG_ATOMIC("disabling [CRTC:%d:%s]\n",
+				 crtc->base.id, crtc->name);
 
 
 		/* Right function depends upon target state. */
@@ -785,8 +787,8 @@ crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state)
 		funcs = crtc->helper_private;
 
 		if (crtc->state->enable && funcs->mode_set_nofb) {
-			DRM_DEBUG_ATOMIC("modeset on [CRTC:%d]\n",
-					 crtc->base.id);
+			DRM_DEBUG_ATOMIC("modeset on [CRTC:%d:%s]\n",
+					 crtc->base.id, crtc->name);
 
 			funcs->mode_set_nofb(crtc);
 		}
@@ -885,8 +887,8 @@ void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev,
 		funcs = crtc->helper_private;
 
 		if (crtc->state->enable) {
-			DRM_DEBUG_ATOMIC("enabling [CRTC:%d]\n",
-					 crtc->base.id);
+			DRM_DEBUG_ATOMIC("enabling [CRTC:%d:%s]\n",
+					 crtc->base.id, crtc->name);
 
 			if (funcs->enable)
 				funcs->enable(crtc);

drivers/gpu/drm/drm_crtc.c

@@ -649,6 +649,18 @@ EXPORT_SYMBOL(drm_framebuffer_remove);
 
 DEFINE_WW_CLASS(crtc_ww_class);
 
+static unsigned int drm_num_crtcs(struct drm_device *dev)
+{
+	unsigned int num = 0;
+	struct drm_crtc *tmp;
+
+	drm_for_each_crtc(tmp, dev) {
+		num++;
+	}
+
+	return num;
+}
+
 /**
  * drm_crtc_init_with_planes - Initialise a new CRTC object with
  *    specified primary and cursor planes.
@@ -684,6 +696,21 @@ int drm_crtc_init_with_planes(struct drm_device *dev, struct drm_crtc *crtc,
 	if (ret)
 		return ret;
 
+	if (name) {
+		va_list ap;
+
+		va_start(ap, name);
+		crtc->name = kvasprintf(GFP_KERNEL, name, ap);
+		va_end(ap);
+	} else {
+		crtc->name = kasprintf(GFP_KERNEL, "crtc-%d",
+				       drm_num_crtcs(dev));
+	}
+	if (!crtc->name) {
+		drm_mode_object_put(dev, &crtc->base);
+		return -ENOMEM;
+	}
+
 	crtc->base.properties = &crtc->properties;
 
 	list_add_tail(&crtc->head, &config->crtc_list);
@@ -730,6 +757,8 @@ void drm_crtc_cleanup(struct drm_crtc *crtc)
 	if (crtc->state && crtc->funcs->atomic_destroy_state)
 		crtc->funcs->atomic_destroy_state(crtc, crtc->state);
 
+	kfree(crtc->name);
+
 	memset(crtc, 0, sizeof(*crtc));
 }
 EXPORT_SYMBOL(drm_crtc_cleanup);
@@ -1814,7 +1843,8 @@ int drm_mode_getresources(struct drm_device *dev, void *data,
 		copied = 0;
 		crtc_id = (uint32_t __user *)(unsigned long)card_res->crtc_id_ptr;
 		drm_for_each_crtc(crtc, dev) {
-			DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
+			DRM_DEBUG_KMS("[CRTC:%d:%s]\n",
+				      crtc->base.id, crtc->name);
 			if (put_user(crtc->base.id, crtc_id + copied)) {
 				ret = -EFAULT;
 				goto out;
@@ -2659,7 +2689,7 @@ int drm_mode_setcrtc(struct drm_device *dev, void *data,
 		ret = -ENOENT;
 		goto out;
 	}
-	DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
+	DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);
 
 	if (crtc_req->mode_valid) {
 		/* If we have a mode we need a framebuffer. */

drivers/gpu/drm/drm_crtc_helper.c

@@ -339,7 +339,7 @@ bool drm_crtc_helper_set_mode(struct drm_crtc *crtc,
 		DRM_DEBUG_KMS("CRTC fixup failed\n");
 		goto done;
 	}
-	DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
+	DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);
 
 	crtc->hwmode = *adjusted_mode;
 
@@ -519,11 +519,13 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set)
 		set->fb = NULL;
 
 	if (set->fb) {
-		DRM_DEBUG_KMS("[CRTC:%d] [FB:%d] #connectors=%d (x y) (%i %i)\n",
-				set->crtc->base.id, set->fb->base.id,
+		DRM_DEBUG_KMS("[CRTC:%d:%s] [FB:%d] #connectors=%d (x y) (%i %i)\n",
+			      set->crtc->base.id, set->crtc->name,
+			      set->fb->base.id,
 			      (int)set->num_connectors, set->x, set->y);
 	} else {
-		DRM_DEBUG_KMS("[CRTC:%d] [NOFB]\n", set->crtc->base.id);
+		DRM_DEBUG_KMS("[CRTC:%d:%s] [NOFB]\n",
+			      set->crtc->base.id, set->crtc->name);
 		drm_crtc_helper_disable(set->crtc);
 		return 0;
 	}
@@ -663,9 +665,9 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set)
 			connector->encoder->crtc = new_crtc;
 		}
 		if (new_crtc) {
-			DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d]\n",
+			DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [CRTC:%d:%s]\n",
 				      connector->base.id, connector->name,
-				new_crtc->base.id);
+				      new_crtc->base.id, new_crtc->name);
 		} else {
 			DRM_DEBUG_KMS("[CONNECTOR:%d:%s] to [NOCRTC]\n",
 				      connector->base.id, connector->name);
@@ -685,8 +687,8 @@ int drm_crtc_helper_set_config(struct drm_mode_set *set)
 			if (!drm_crtc_helper_set_mode(set->crtc, set->mode,
 						      set->x, set->y,
 						      save_set.fb)) {
-				DRM_ERROR("failed to set mode on [CRTC:%d]\n",
-					  set->crtc->base.id);
+				DRM_ERROR("failed to set mode on [CRTC:%d:%s]\n",
+					  set->crtc->base.id, set->crtc->name);
 				set->crtc->primary->fb = save_set.fb;
 				ret = -EINVAL;
 				goto fail;

include/drm/drm_crtc.h

@@ -712,6 +712,8 @@ struct drm_crtc {
 	struct device_node *port;
 	struct list_head head;
 
+	char *name;
+
 	/*
 	 * crtc mutex
 	 *