Propossed patch
--
Ricardo Ribalda
diff --git a/drivers/gpu/drm/i915/intel_dp_link_training.c b/drivers/gpu/drm/i915/intel_dp_link_training.c
index 3fcaa98..50a7c93 100644
--- a/drivers/gpu/drm/i915/intel_dp_link_training.c
+++ b/drivers/gpu/drm/i915/intel_dp_link_training.c
@@ -318,14 +318,23 @@ void intel_dp_stop_link_train(struct intel_dp *intel_dp)
DP_TRAINING_PATTERN_DISABLE);
}
+#define N_TRIES 20
void
intel_dp_start_link_train(struct intel_dp *intel_dp)
{
struct intel_connector *intel_connector = intel_dp->attached_connector;
+ int tries;
- if (!intel_dp_link_training_clock_recovery(intel_dp))
- goto failure_handling;
- if (!intel_dp_link_training_channel_equalization(intel_dp))
+ for (tries = 0; tries < N_TRIES; tries++) {
+ if (!intel_dp_link_training_clock_recovery(intel_dp)){
+ msleep(10);
+ continue;
+ }
+ if (intel_dp_link_training_channel_equalization(intel_dp))
+ break;
+ }
+
+ if (tries == N_TRIES)
goto failure_handling;
DRM_DEBUG_KMS("[CONNECTOR:%d:%s] Link Training Passed at Link Rate = %d, Lane count = %d",
