1 files changed, 42 insertions, 8 deletions

diff --git a/drivers/gpu/drm/i915/display/intel_panel.c b/drivers/gpu/drm/i915/display/intel_panel.c
index 41cec9dc4223..42aa04bac261 100644
--- a/drivers/gpu/drm/i915/display/intel_panel.c
+++ b/drivers/gpu/drm/i915/display/intel_panel.c
@@ -31,6 +31,9 @@
 #include <linux/kernel.h>
 #include <linux/pwm.h>
 
+#include <drm/drm_edid.h>
+
+#include "i915_reg.h"
 #include "intel_backlight.h"
 #include "intel_connector.h"
 #include "intel_de.h"
@@ -85,9 +88,10 @@ static bool is_alt_drrs_mode(const struct drm_display_mode *mode,
 static bool is_alt_fixed_mode(const struct drm_display_mode *mode,
 			      const struct drm_display_mode *preferred_mode)
 {
-	return drm_mode_match(mode, preferred_mode,
-			      DRM_MODE_MATCH_FLAGS |
-			      DRM_MODE_MATCH_3D_FLAGS) &&
+	u32 sync_flags = DRM_MODE_FLAG_PHSYNC | DRM_MODE_FLAG_NHSYNC |
+		DRM_MODE_FLAG_PVSYNC | DRM_MODE_FLAG_NVSYNC;
+
+	return (mode->flags & ~sync_flags) == (preferred_mode->flags & ~sync_flags) &&
 		mode->hdisplay == preferred_mode->hdisplay &&
 		mode->vdisplay == preferred_mode->vdisplay;
 }
@@ -147,12 +151,24 @@ int intel_panel_get_modes(struct intel_connector *connector)
 	return num_modes;
 }
 
-enum drrs_type intel_panel_drrs_type(struct intel_connector *connector)
+static bool has_drrs_modes(struct intel_connector *connector)
 {
-	if (list_empty(&connector->panel.fixed_modes) ||
-	    list_is_singular(&connector->panel.fixed_modes))
-		return DRRS_TYPE_NONE;
+	const struct drm_display_mode *mode1;
+
+	list_for_each_entry(mode1, &connector->panel.fixed_modes, head) {
+		const struct drm_display_mode *mode2 = mode1;
+
+		list_for_each_entry_continue(mode2, &connector->panel.fixed_modes, head) {
+			if (is_alt_drrs_mode(mode1, mode2))
+				return true;
+		}
+	}
+
+	return false;
+}
 
+enum drrs_type intel_panel_drrs_type(struct intel_connector *connector)
+{
 	return connector->panel.vbt.drrs_type;
 }
 
@@ -647,12 +663,27 @@ intel_panel_mode_valid(struct intel_connector *connector,
 	return MODE_OK;
 }
 
-int intel_panel_init(struct intel_connector *connector)
+void intel_panel_init_alloc(struct intel_connector *connector)
 {
 	struct intel_panel *panel = &connector->panel;
 
+	connector->panel.vbt.panel_type = -1;
+	connector->panel.vbt.backlight.controller = -1;
+	INIT_LIST_HEAD(&panel->fixed_modes);
+}
+
+int intel_panel_init(struct intel_connector *connector,
+		     const struct drm_edid *fixed_edid)
+{
+	struct intel_panel *panel = &connector->panel;
+
+	panel->fixed_edid = fixed_edid;
+
 	intel_backlight_init_funcs(panel);
 
+	if (!has_drrs_modes(connector))
+		connector->panel.vbt.drrs_type = DRRS_TYPE_NONE;
+
 	drm_dbg_kms(connector->base.dev,
 		    "[CONNECTOR:%d:%s] DRRS type: %s\n",
 		    connector->base.base.id, connector->base.name,
@@ -666,6 +697,9 @@ void intel_panel_fini(struct intel_connector *connector)
 	struct intel_panel *panel = &connector->panel;
 	struct drm_display_mode *fixed_mode, *next;
 
+	if (!IS_ERR_OR_NULL(panel->fixed_edid))
+		drm_edid_free(panel->fixed_edid);
+
 	intel_backlight_destroy(panel);
 
 	intel_bios_fini_panel(panel);