drm/i915: Make modeset state verifier take crtc as argument.

This will make it easier to keep the crtc checker when atomic
commit is reworked for asynchronous commits. This prevents checking
crtc's that were not part of the state. It's safe to verify disabled
encoders, connectors and dpll's that are not part of the state,
because during modeset connection_mutex is held.
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1458741487-23801-2-git-send-email-maarten.lankhorst@linux.intel.comReviewed-by: Matt Roper <matthew.d.roper@intel.com>
[mlankhorst: Extend commit message and rename check to verify.]

drivers/gpu/drm/i915/intel_display.c

@@ -12756,26 +12756,23 @@ static void intel_pipe_config_sanity_check(struct drm_i915_private *dev_priv,
 	}
 }
 
-static void check_wm_state(struct drm_device *dev)
+static void check_wm_state(struct drm_crtc *crtc,
+			   struct drm_crtc_state *new_state)
 {
+	struct drm_device *dev = crtc->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct skl_ddb_allocation hw_ddb, *sw_ddb;
-	struct intel_crtc *intel_crtc;
+	struct skl_ddb_entry *hw_entry, *sw_entry;
+	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
+	const enum pipe pipe = intel_crtc->pipe;
 	int plane;
 
-	if (INTEL_INFO(dev)->gen < 9)
+	if (INTEL_INFO(dev)->gen < 9 || !new_state->active)
 		return;
 
 	skl_ddb_get_hw_state(dev_priv, &hw_ddb);
 	sw_ddb = &dev_priv->wm.skl_hw.ddb;
 
-	for_each_intel_crtc(dev, intel_crtc) {
-		struct skl_ddb_entry *hw_entry, *sw_entry;
-		const enum pipe pipe = intel_crtc->pipe;
-
-		if (!intel_crtc->active)
-			continue;
-
 	/* planes */
 	for_each_plane(dev_priv, pipe, plane) {
 		hw_entry = &hw_ddb.plane[pipe][plane];
@@ -12795,9 +12792,7 @@ static void check_wm_state(struct drm_device *dev)
 	hw_entry = &hw_ddb.plane[pipe][PLANE_CURSOR];
 	sw_entry = &sw_ddb->plane[pipe][PLANE_CURSOR];
 
-		if (skl_ddb_entry_equal(hw_entry, sw_entry))
-			continue;
-
+	if (!skl_ddb_entry_equal(hw_entry, sw_entry)) {
 		DRM_ERROR("mismatch in DDB state pipe %c cursor "
 			  "(expected (%u,%u), found (%u,%u))\n",
 			  pipe_name(pipe),
@@ -12807,19 +12802,17 @@ static void check_wm_state(struct drm_device *dev)
 }
 
 static void
-check_connector_state(struct drm_device *dev,
-		      struct drm_atomic_state *old_state)
+check_connector_state(struct drm_device *dev, struct drm_crtc *crtc)
 {
-	struct drm_connector_state *old_conn_state;
 	struct drm_connector *connector;
-	int i;
 
-	for_each_connector_in_state(old_state, connector, old_conn_state, i) {
+	drm_for_each_connector(connector, dev) {
 		struct drm_encoder *encoder = connector->encoder;
 		struct drm_connector_state *state = connector->state;
 
-		/* This also checks the encoder/connector hw state with the
-		 * ->get_hw_state callbacks. */
+		if (state->crtc != crtc)
+			continue;
+
 		intel_connector_check_state(to_intel_connector(connector));
 
 		I915_STATE_WARN(state->best_encoder != encoder,
@@ -12868,55 +12861,49 @@ check_encoder_state(struct drm_device *dev)
 }
 
 static void
-check_crtc_state(struct drm_device *dev, struct drm_atomic_state *old_state)
+check_crtc_state(struct drm_crtc *crtc,
+		 struct drm_crtc_state *old_crtc_state,
+		 struct drm_crtc_state *new_crtc_state)
 {
+	struct drm_device *dev = crtc->dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
 	struct intel_encoder *encoder;
-	struct drm_crtc_state *old_crtc_state;
-	struct drm_crtc *crtc;
-	int i;
-
-	for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) {
 	struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
 	struct intel_crtc_state *pipe_config, *sw_config;
+	struct drm_atomic_state *old_state;
 	bool active;
 
-		if (!needs_modeset(crtc->state) &&
-		    !to_intel_crtc_state(crtc->state)->update_pipe)
-			continue;
-
+	old_state = old_crtc_state->state;
 	__drm_atomic_helper_crtc_destroy_state(crtc, old_crtc_state);
 	pipe_config = to_intel_crtc_state(old_crtc_state);
 	memset(pipe_config, 0, sizeof(*pipe_config));
 	pipe_config->base.crtc = crtc;
 	pipe_config->base.state = old_state;
 
-		DRM_DEBUG_KMS("[CRTC:%d]\n",
-			      crtc->base.id);
+	DRM_DEBUG_KMS("[CRTC:%d]\n", crtc->base.id);
 
-		active = dev_priv->display.get_pipe_config(intel_crtc,
-							   pipe_config);
+	active = dev_priv->display.get_pipe_config(intel_crtc, pipe_config);
 
 	/* hw state is inconsistent with the pipe quirk */
 	if ((intel_crtc->pipe == PIPE_A && dev_priv->quirks & QUIRK_PIPEA_FORCE) ||
 	    (intel_crtc->pipe == PIPE_B && dev_priv->quirks & QUIRK_PIPEB_FORCE))
-			active = crtc->state->active;
+		active = new_crtc_state->active;
 
-		I915_STATE_WARN(crtc->state->active != active,
+	I915_STATE_WARN(new_crtc_state->active != active,
 	     "crtc active state doesn't match with hw state "
-		     "(expected %i, found %i)\n", crtc->state->active, active);
+	     "(expected %i, found %i)\n", new_crtc_state->active, active);
 
-		I915_STATE_WARN(intel_crtc->active != crtc->state->active,
+	I915_STATE_WARN(intel_crtc->active != new_crtc_state->active,
 	     "transitional active state does not match atomic hw state "
-		     "(expected %i, found %i)\n", crtc->state->active, intel_crtc->active);
+	     "(expected %i, found %i)\n", new_crtc_state->active, intel_crtc->active);
 
 	for_each_encoder_on_crtc(dev, crtc, encoder) {
 		enum pipe pipe;
 
 		active = encoder->get_hw_state(encoder, &pipe);
-			I915_STATE_WARN(active != crtc->state->active,
+		I915_STATE_WARN(active != new_crtc_state->active,
 			"[ENCODER:%i] active %i with crtc active %i\n",
-				encoder->base.base.id, active, crtc->state->active);
+			encoder->base.base.id, active, new_crtc_state->active);
 
 		I915_STATE_WARN(active && intel_crtc->pipe != pipe,
 				"Encoder connected to wrong pipe %c\n",
@@ -12926,8 +12913,8 @@ check_crtc_state(struct drm_device *dev, struct drm_atomic_state *old_state)
 			encoder->get_config(encoder, pipe_config);
 	}
 
-		if (!crtc->state->active)
-			continue;
+	if (!new_crtc_state->active)
+		return;
 
 	intel_pipe_config_sanity_check(dev_priv, pipe_config);
 
@@ -12940,21 +12927,16 @@ check_crtc_state(struct drm_device *dev, struct drm_atomic_state *old_state)
 		intel_dump_pipe_config(intel_crtc, sw_config,
 				       "[sw state]");
 	}
-	}
 }
 
 static void
-check_shared_dpll_state(struct drm_device *dev)
+check_single_dpll_state(struct drm_i915_private *dev_priv,
+			struct intel_shared_dpll *pll,
+			struct drm_crtc *crtc,
+			struct drm_crtc_state *new_state)
 {
-	struct drm_i915_private *dev_priv = dev->dev_private;
-	struct intel_crtc *crtc;
 	struct intel_dpll_hw_state dpll_hw_state;
-	int i;
-
-	for (i = 0; i < dev_priv->num_shared_dpll; i++) {
-		struct intel_shared_dpll *pll =
-			intel_get_shared_dpll_by_id(dev_priv, i);
-		unsigned enabled_crtcs = 0, active_crtcs = 0;
+	unsigned crtc_mask;
 	bool active;
 
 	memset(&dpll_hw_state, 0, sizeof(dpll_hw_state));
@@ -12963,10 +12945,6 @@ check_shared_dpll_state(struct drm_device *dev)
 
 	active = pll->funcs.get_hw_state(dev_priv, pll, &dpll_hw_state);
 
-		I915_STATE_WARN(pll->active_mask & ~pll->config.crtc_mask,
-		     "more active pll users than references: %x vs %x\n",
-		     pll->active_mask, pll->config.crtc_mask);
-
 	if (!(pll->flags & INTEL_DPLL_ALWAYS_ON)) {
 		I915_STATE_WARN(!pll->on && pll->active_mask,
 		     "pll in active use but not on in sw tracking\n");
@@ -12977,35 +12955,107 @@ check_shared_dpll_state(struct drm_device *dev)
 		     pll->on, active);
 	}
 
-		for_each_intel_crtc(dev, crtc) {
-			if (crtc->base.state->enable && crtc->config->shared_dpll == pll)
-				enabled_crtcs |= 1 << drm_crtc_index(&crtc->base);
-			if (crtc->base.state->active && crtc->config->shared_dpll == pll)
-				active_crtcs |= 1 << drm_crtc_index(&crtc->base);
+	if (!crtc) {
+		I915_STATE_WARN(pll->active_mask & ~pll->config.crtc_mask,
+				"more active pll users than references: %x vs %x\n",
+				pll->active_mask, pll->config.crtc_mask);
+
+		return;
 	}
 
-		I915_STATE_WARN(pll->active_mask != active_crtcs,
-		     "pll active crtcs mismatch (expected %x, found %x)\n",
-		     pll->active_mask, active_crtcs);
-		I915_STATE_WARN(pll->config.crtc_mask != enabled_crtcs,
-		     "pll enabled crtcs mismatch (expected %x, found %x)\n",
-		     pll->config.crtc_mask, enabled_crtcs);
+	crtc_mask = 1 << drm_crtc_index(crtc);
 
-		I915_STATE_WARN(pll->on && memcmp(&pll->config.hw_state, &dpll_hw_state,
+	if (new_state->active)
+		I915_STATE_WARN(!(pll->active_mask & crtc_mask),
+				"pll active mismatch (expected pipe %c in active mask 0x%02x)\n",
+				pipe_name(drm_crtc_index(crtc)), pll->active_mask);
+	else
+		I915_STATE_WARN(pll->active_mask & crtc_mask,
+				"pll active mismatch (didn't expect pipe %c in active mask 0x%02x)\n",
+				pipe_name(drm_crtc_index(crtc)), pll->active_mask);
+
+	I915_STATE_WARN(!(pll->config.crtc_mask & crtc_mask),
+			"pll enabled crtcs mismatch (expected 0x%x in 0x%02x)\n",
+			crtc_mask, pll->config.crtc_mask);
+
+	I915_STATE_WARN(pll->on && memcmp(&pll->config.hw_state,
+					  &dpll_hw_state,
 					  sizeof(dpll_hw_state)),
 			"pll hw state mismatch\n");
+}
+
+static void
+check_shared_dpll_state(struct drm_device *dev, struct drm_crtc *crtc,
+			struct drm_crtc_state *old_crtc_state,
+			struct drm_crtc_state *new_crtc_state)
+{
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	struct intel_crtc_state *old_state = to_intel_crtc_state(old_crtc_state);
+	struct intel_crtc_state *new_state = to_intel_crtc_state(new_crtc_state);
+
+	if (new_state->shared_dpll)
+		check_single_dpll_state(dev_priv, new_state->shared_dpll, crtc, new_crtc_state);
+
+	if (old_state->shared_dpll &&
+	    old_state->shared_dpll != new_state->shared_dpll) {
+		unsigned crtc_mask = 1 << drm_crtc_index(crtc);
+		struct intel_shared_dpll *pll = old_state->shared_dpll;
+
+		I915_STATE_WARN(pll->active_mask & crtc_mask,
+				"pll active mismatch (didn't expect pipe %c in active mask)\n",
+				pipe_name(drm_crtc_index(crtc)));
+		I915_STATE_WARN(pll->config.crtc_mask & crtc_mask,
+				"pll enabled crtcs mismatch (found %x in enabled mask)\n",
+				pipe_name(drm_crtc_index(crtc)));
 	}
 }
 
 static void
-intel_modeset_check_state(struct drm_device *dev,
+intel_modeset_check_crtc(struct drm_crtc *crtc,
+			 struct drm_crtc_state *old_state,
+			 struct drm_crtc_state *new_state)
+{
+	if (!needs_modeset(new_state) &&
+	    !to_intel_crtc_state(new_state)->update_pipe)
+		return;
+
+	check_wm_state(crtc, new_state);
+	check_connector_state(crtc->dev, crtc);
+	check_crtc_state(crtc, old_state, new_state);
+	check_shared_dpll_state(crtc->dev, crtc, old_state, new_state);
+}
+
+static void
+check_disabled_dpll_state(struct drm_device *dev)
+{
+	struct drm_i915_private *dev_priv = dev->dev_private;
+	int i;
+
+	for (i = 0; i < dev_priv->num_shared_dpll; i++)
+		check_single_dpll_state(dev_priv, &dev_priv->shared_dplls[i], NULL, NULL);
+}
+
+static void
+intel_modeset_check_disabled(struct drm_device *dev,
 			     struct drm_atomic_state *old_state)
 {
-	check_wm_state(dev);
-	check_connector_state(dev, old_state);
 	check_encoder_state(dev);
-	check_crtc_state(dev, old_state);
-	check_shared_dpll_state(dev);
+	check_connector_state(dev, NULL);
+	check_disabled_dpll_state(dev);
+}
+
+static void
+intel_modeset_check_state(struct drm_device *dev,
+			  struct drm_atomic_state *old_state)
+{
+	struct drm_crtc_state *old_crtc_state;
+	struct drm_crtc *crtc;
+	int i;
+
+	for_each_crtc_in_state(old_state, crtc, old_crtc_state, i)
+		intel_modeset_check_crtc(crtc, old_crtc_state, crtc->state);
+
+	intel_modeset_check_disabled(dev, old_state);
 }
 
 static void update_scanline_offset(struct intel_crtc *crtc)