[PATCH v4 05/19] drm/i915/psr: Check possible errors for panel replay as well

[Jouni Högander]

On HPD interrupt we want to check if the reason for HPD was some panel
replay error detected by monitor/panel. This is already done for PSR. We
want to do this for panel replay as well. Modify intel_psr_short_pulse to
support panel replay as well.

Signed-off-by: Jouni Högander <jouni.hogander at intel.com>
Reviewed-by: Animesh Manna <animesh.manna at intel.com>
---
 drivers/gpu/drm/i915/display/intel_psr.c | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index 07c1ddec2d86..d7547eefc2fa 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -3256,6 +3256,13 @@ static void psr_capability_changed_check(struct intel_dp *intel_dp)
 	}
 }
 
+/*
+ * On common bits:
+ * DP_PSR_RFB_STORAGE_ERROR == DP_PANEL_REPLAY_RFB_STORAGE_ERROR
+ * DP_PSR_VSC_SDP_UNCORRECTABLE_ERROR == DP_PANEL_REPLAY_VSC_SDP_UNCORRECTABLE_ERROR
+ * DP_PSR_LINK_CRC_ERROR == DP_PANEL_REPLAY_LINK_CRC_ERROR
+ * this function is relying on PSR definitions
+ */
 void intel_psr_short_pulse(struct intel_dp *intel_dp)
 {
 	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
@@ -3265,7 +3272,7 @@ void intel_psr_short_pulse(struct intel_dp *intel_dp)
 			  DP_PSR_VSC_SDP_UNCORRECTABLE_ERROR |
 			  DP_PSR_LINK_CRC_ERROR;
 
-	if (!CAN_PSR(intel_dp))
+	if (!CAN_PSR(intel_dp) && !CAN_PANEL_REPLAY(intel_dp))
 		return;
 
 	mutex_lock(&psr->lock);
@@ -3279,12 +3286,14 @@ void intel_psr_short_pulse(struct intel_dp *intel_dp)
 		goto exit;
 	}
 
-	if (status == DP_PSR_SINK_INTERNAL_ERROR || (error_status & errors)) {
+	if ((!psr->panel_replay_enabled && status == DP_PSR_SINK_INTERNAL_ERROR) ||
+	    (error_status & errors)) {
 		intel_psr_disable_locked(intel_dp);
 		psr->sink_not_reliable = true;
 	}
 
-	if (status == DP_PSR_SINK_INTERNAL_ERROR && !error_status)
+	if (!psr->panel_replay_enabled && status == DP_PSR_SINK_INTERNAL_ERROR &&
+	    !error_status)
 		drm_dbg_kms(&dev_priv->drm,
 			    "PSR sink internal error, disabling PSR\n");
 	if (error_status & DP_PSR_RFB_STORAGE_ERROR)
@@ -3304,8 +3313,10 @@ void intel_psr_short_pulse(struct intel_dp *intel_dp)
 	/* clear status register */
 	drm_dp_dpcd_writeb(&intel_dp->aux, DP_PSR_ERROR_STATUS, error_status);
 
-	psr_alpm_check(intel_dp);
-	psr_capability_changed_check(intel_dp);
+	if (!psr->panel_replay_enabled) {
+		psr_alpm_check(intel_dp);
+		psr_capability_changed_check(intel_dp);
+	}
 
 exit:
 	mutex_unlock(&psr->lock);
-- 
2.34.1