drm/i915: Introduce intel_drrs_type_str()

Add helper to get the drrs type as a string, and use it
in a couple of places. Also pimp the debugfs output a bit
while at it.
Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220311172428.14685-11-ville.syrjala@linux.intel.comReviewed-by: Jani Nikula <jani.nikula@intel.com>

drivers/gpu/drm/i915/display/intel_display_debugfs.c

@@ -22,6 +22,7 @@
 #include "intel_fbdev.h"
 #include "intel_hdcp.h"
 #include "intel_hdmi.h"
+#include "intel_panel.h"
 #include "intel_pm.h"
 #include "intel_psr.h"
 #include "intel_sprite.h"
@@ -1143,23 +1144,17 @@ static void drrs_status_per_crtc(struct seq_file *m,
 {
 	struct drm_i915_private *dev_priv = to_i915(dev);
 	struct i915_drrs *drrs = &dev_priv->drrs;
-	struct drm_connector *connector;
+	struct intel_connector *connector;
 	struct drm_connector_list_iter conn_iter;
 
 	drm_connector_list_iter_begin(dev, &conn_iter);
-	drm_for_each_connector_iter(connector, &conn_iter) {
-		bool supported = false;
-
-		if (connector->state->crtc != &crtc->base)
+	for_each_intel_connector_iter(connector, &conn_iter) {
+		if (connector->base.state->crtc != &crtc->base)
 			continue;
 
-		seq_printf(m, "%s:\n", connector->name);
-
-		if (connector->connector_type == DRM_MODE_CONNECTOR_eDP &&
-		    dev_priv->vbt.drrs_type == DRRS_TYPE_SEAMLESS)
-			supported = true;
-
-		seq_printf(m, "\tDRRS Supported: %s\n", str_yes_no(supported));
+		seq_printf(m, "[CONNECTOR:%d:%s] DRRS type: %s\n",
+			   connector->base.base.id, connector->base.name,
+			   intel_drrs_type_str(intel_panel_drrs_type(connector)));
 	}
 	drm_connector_list_iter_end(&conn_iter);
 

drivers/gpu/drm/i915/display/intel_drrs.c

@@ -47,6 +47,20 @@
  * requested by userspace.
  */
 
+const char *intel_drrs_type_str(enum drrs_type drrs_type)
+{
+	static const char * const str[] = {
+		[DRRS_TYPE_NONE] = "none",
+		[DRRS_TYPE_STATIC] = "static",
+		[DRRS_TYPE_SEAMLESS] = "seamless",
+	};
+
+	if (drrs_type >= ARRAY_SIZE(str))
+		return "<invalid>";
+
+	return str[drrs_type];
+}
+
 static bool can_enable_drrs(struct intel_connector *connector,
 			    const struct intel_crtc_state *pipe_config)
 {
@@ -461,8 +475,9 @@ intel_drrs_init(struct intel_connector *connector,
 
 	dev_priv->drrs.refresh_rate = DRRS_REFRESH_RATE_HIGH;
 	drm_dbg_kms(&dev_priv->drm,
-		    "[CONNECTOR:%d:%s] seamless DRRS supported\n",
-		    connector->base.base.id, connector->base.name);
+		    "[CONNECTOR:%d:%s] %s DRRS supported\n",
+		    connector->base.base.id, connector->base.name,
+		    intel_drrs_type_str(dev_priv->vbt.drrs_type));
 
 	return downclock_mode;
 }

drivers/gpu/drm/i915/display/intel_drrs.h

@@ -8,6 +8,7 @@
 
 #include <linux/types.h>
 
+enum drrs_type;
 struct drm_i915_private;
 struct intel_atomic_state;
 struct intel_crtc;
@@ -15,6 +16,7 @@ struct intel_crtc_state;
 struct intel_connector;
 struct intel_dp;
 
+const char *intel_drrs_type_str(enum drrs_type drrs_type);
 void intel_drrs_enable(struct intel_dp *intel_dp,
 		       const struct intel_crtc_state *crtc_state);
 void intel_drrs_disable(struct intel_dp *intel_dp,