drm/i915/psr: Store pr_dpcd in intel_dp

We need pr_dpcd contents for early transport validity check on eDP Panel
Replay and in debugfs interface to dump out panel early transport
capability. Also remove unnecessarily printing out "Panel replay is not
supported by panel"

v2: commit message modified

Signed-off-by: Jouni Högander <jouni.hogander@intel.com>
Reviewed-by: Animesh Manna <animesh.manna@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240528114455.175961-2-jouni.hogander@intel.com

1 files changed, 6 insertions, 13 deletions

diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index f59238d3d484..08d3c8c81585 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -559,20 +559,10 @@ exit:
 static void _panel_replay_init_dpcd(struct intel_dp *intel_dp)
 {
 	struct drm_i915_private *i915 = dp_to_i915(intel_dp);
-	u8 pr_dpcd = 0;
-
-	intel_dp->psr.sink_panel_replay_support = false;
-	drm_dp_dpcd_readb(&intel_dp->aux, DP_PANEL_REPLAY_CAP, &pr_dpcd);
-
-	if (!(pr_dpcd & DP_PANEL_REPLAY_SUPPORT)) {
-		drm_dbg_kms(&i915->drm,
-			    "Panel replay is not supported by panel\n");
-		return;
-	}
 
 	intel_dp->psr.sink_panel_replay_support = true;
 
-	if (pr_dpcd & DP_PANEL_REPLAY_SU_SUPPORT)
+	if (intel_dp->pr_dpcd & DP_PANEL_REPLAY_SU_SUPPORT)
 		intel_dp->psr.sink_panel_replay_su_support = true;
 
 	drm_dbg_kms(&i915->drm,
@@ -630,10 +620,13 @@ static void _psr_init_dpcd(struct intel_dp *intel_dp)
 
 void intel_psr_init_dpcd(struct intel_dp *intel_dp)
 {
-	_panel_replay_init_dpcd(intel_dp);
-
 	drm_dp_dpcd_read(&intel_dp->aux, DP_PSR_SUPPORT, intel_dp->psr_dpcd,
 			 sizeof(intel_dp->psr_dpcd));
+	drm_dp_dpcd_readb(&intel_dp->aux, DP_PANEL_REPLAY_CAP,
+			  &intel_dp->pr_dpcd);
+
+	if (intel_dp->pr_dpcd & DP_PANEL_REPLAY_SUPPORT)
+		_panel_replay_init_dpcd(intel_dp);
 
 	if (intel_dp->psr_dpcd[0])
 		_psr_init_dpcd(intel_dp);