From: Adam Jackson <ajax@redhat.com>
Date: Tue, 12 Jul 2011 21:38:04 +0000 (-0400)
Subject: drm/i915/dp: Retry DPCD fetch on G4X too
X-Git-Tag: firefly_0821_release~3680^2~4714^2~10^2~10^2~2
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=71ba9000e673d6171a52f2a8b14e0419087f7199;p=firefly-linux-kernel-4.4.55.git

drm/i915/dp: Retry DPCD fetch on G4X too

Signed-off-by: Adam Jackson <ajax@redhat.com>
Reviewed-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Keith Packard <keithp@keithp.com>
---

diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 13bddd34c057..9a0c3ca1ffa9 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1595,11 +1595,23 @@ intel_dp_check_link_status(struct intel_dp *intel_dp)
 	}
 }
 
+static enum drm_connector_status
+i915_dp_detect_common(struct intel_dp *intel_dp)
+{
+	enum drm_connector_status status = connector_status_disconnected;
+
+	if (intel_dp_aux_native_read_retry(intel_dp, 0x000, intel_dp->dpcd,
+					   sizeof (intel_dp->dpcd)) &&
+	    (intel_dp->dpcd[DP_DPCD_REV] != 0))
+		status = connector_status_connected;
+
+	return status;
+}
+
 static enum drm_connector_status
 ironlake_dp_detect(struct intel_dp *intel_dp)
 {
 	enum drm_connector_status status;
-	bool ret;
 
 	/* Can't disconnect eDP, but you can close the lid... */
 	if (is_edp(intel_dp)) {
@@ -1609,13 +1621,7 @@ ironlake_dp_detect(struct intel_dp *intel_dp)
 		return status;
 	}
 
-	status = connector_status_disconnected;
-	ret = intel_dp_aux_native_read_retry(intel_dp,
-					     0x000, intel_dp->dpcd,
-					     sizeof (intel_dp->dpcd));
-	if (ret && intel_dp->dpcd[DP_DPCD_REV] != 0)
-		status = connector_status_connected;
-	return status;
+	return i915_dp_detect_common(intel_dp);
 }
 
 static enum drm_connector_status
@@ -1623,7 +1629,6 @@ g4x_dp_detect(struct intel_dp *intel_dp)
 {
 	struct drm_device *dev = intel_dp->base.base.dev;
 	struct drm_i915_private *dev_priv = dev->dev_private;
-	enum drm_connector_status status;
 	uint32_t temp, bit;
 
 	switch (intel_dp->output_reg) {
@@ -1645,15 +1650,7 @@ g4x_dp_detect(struct intel_dp *intel_dp)
 	if ((temp & bit) == 0)
 		return connector_status_disconnected;
 
-	status = connector_status_disconnected;
-	if (intel_dp_aux_native_read(intel_dp, 0x000, intel_dp->dpcd,
-				     sizeof (intel_dp->dpcd)) == sizeof (intel_dp->dpcd))
-	{
-		if (intel_dp->dpcd[DP_DPCD_REV] != 0)
-			status = connector_status_connected;
-	}
-
-	return status;
+	return i915_dp_detect_common(intel_dp);
 }
 
 /**