drm/i915/psr: Add Early Transport into psr debugfs interface

We want to have sink Early Transport capability and usage in our psr
debugfs status interface.

v4: use su_region_et_enabled instead of psr2_su_region_et_valid
v3: remove extra space from "PSR mode:  disabled"
v2: printout "Selective Update enabled (Early Transport)" instead of
    "Selective Update Early Transport enabled"
Reviewed-by: Animesh Manna <animesh.manna@intel.com>
Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240529093849.1016172-7-jouni.hogander@intel.com

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

@@ -3332,25 +3332,44 @@ static void intel_psr_sink_capability(struct intel_dp *intel_dp,
 
 	if (psr->sink_support)
 		seq_printf(m, " [0x%02x]", intel_dp->psr_dpcd[0]);
+	if (intel_dp->psr_dpcd[0] == DP_PSR2_WITH_Y_COORD_ET_SUPPORTED)
+		seq_printf(m, " (Early Transport)");
 	seq_printf(m, ", Panel Replay = %s", str_yes_no(psr->sink_panel_replay_support));
-	seq_printf(m, ", Panel Replay Selective Update = %s\n",
+	seq_printf(m, ", Panel Replay Selective Update = %s",
 		   str_yes_no(psr->sink_panel_replay_su_support));
+	if (intel_dp->pr_dpcd & DP_PANEL_REPLAY_EARLY_TRANSPORT_SUPPORT)
+		seq_printf(m, " (Early Transport)");
+	seq_printf(m, "\n");
 }
 
 static void intel_psr_print_mode(struct intel_dp *intel_dp,
 				 struct seq_file *m)
 {
 	struct intel_psr *psr = &intel_dp->psr;
-	const char *status;
+	const char *status, *mode, *region_et;
 
-	if (psr->panel_replay_enabled)
-		status = psr->sel_update_enabled ? "Panel Replay Selective Update Enabled" :
-			"Panel Replay Enabled";
-	else if (psr->enabled)
-		status = psr->sel_update_enabled ? "PSR2" : "PSR1";
+	if (psr->enabled)
+		status = " enabled";
 	else
 		status = "disabled";
-	seq_printf(m, "PSR mode: %s\n", status);
+
+	if (psr->panel_replay_enabled && psr->sel_update_enabled)
+		mode = "Panel Replay Selective Update";
+	else if (psr->panel_replay_enabled)
+		mode = "Panel Replay";
+	else if (psr->sel_update_enabled)
+		mode = "PSR2";
+	else if (psr->enabled)
+		mode = "PSR1";
+	else
+		mode = "";
+
+	if (psr->su_region_et_enabled)
+		region_et = " (Early Transport)";
+	else
+		region_et = "";
+
+	seq_printf(m, "PSR mode: %s%s%s\n", mode, status, region_et);
 }
 
 static int intel_psr_status(struct seq_file *m, struct intel_dp *intel_dp)