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>

1 files changed, 15 insertions, 18 deletions

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
@@ -1596,10 +1596,22 @@ 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);
 }
 
 /**