drm/i915/psr: Detect panel replay selective update support

Add new boolean to store panel replay selective update support of sink into
intel_psr struct.  Detect panel replay selective update support and store
it into this new boolean.

v3: Clear sink_panel_replay_su_support in intel_dp_detect
v2: Merge adding new boolean into this patch
Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Animesh Manna <animesh.manna@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240510093823.3146455-7-jouni.hogander@intel.com

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

@@ -1724,6 +1724,7 @@ struct intel_psr {
 	u16 su_y_granularity;
 	bool source_panel_replay_support;
 	bool sink_panel_replay_support;
+	bool sink_panel_replay_su_support;
 	bool panel_replay_enabled;
 	u32 dc3co_exitline;
 	u32 dc3co_exit_delay;

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

@@ -5861,6 +5861,7 @@ intel_dp_detect(struct drm_connector *connector,
 		memset(&intel_dp->compliance, 0, sizeof(intel_dp->compliance));
 		memset(intel_connector->dp.dsc_dpcd, 0, sizeof(intel_connector->dp.dsc_dpcd));
 		intel_dp->psr.sink_panel_replay_support = false;
+		intel_dp->psr.sink_panel_replay_su_support = false;
 
 		intel_dp_mst_disconnect(intel_dp);
 

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

@@ -522,9 +522,15 @@ static void _panel_replay_init_dpcd(struct intel_dp *intel_dp)
 		return;
 	}
 
-	drm_dbg_kms(&i915->drm,
-		    "Panel replay is supported by panel\n");
 	intel_dp->psr.sink_panel_replay_support = true;
+
+	if (pr_dpcd & DP_PANEL_REPLAY_SU_SUPPORT)
+		intel_dp->psr.sink_panel_replay_su_support = true;
+
+	drm_dbg_kms(&i915->drm,
+		    "Panel replay %sis supported by panel\n",
+		    intel_dp->psr.sink_panel_replay_su_support ?
+		    "selective_update " : "");
 }
 
 static void _psr_init_dpcd(struct intel_dp *intel_dp)