disp: msm: dp: check for aux abort in sim mode

In sim mode, the dp driver is not checking for the aux state before
processing an aux request. This ends up causing the drm framework to
unnecessarily wait for 4 seconds while destroying a stream.

This change adds the check for aux state to align with the behavior
of a real sink.

Change-Id: I81900018ac1b403bb1e03fe26206e145694fefbd
Signed-off-by: Rajkumar Subbiah <[email protected]>

msm/dp/dp_aux.c

@@ -560,6 +560,15 @@ static ssize_t dp_aux_transfer_debug(struct drm_dp_aux *drm_aux,
 	struct dp_aux_private *aux = container_of(drm_aux,
 			struct dp_aux_private, drm_aux);
 	ssize_t size;
+	int aborted;
+
+	mutex_lock(&aux->mutex);
+	aborted = atomic_read(&aux->aborted);
+	mutex_unlock(&aux->mutex);
+	if (aborted) {
+		size = -ETIMEDOUT;
+		goto end;
+	}
 
 	if (aux->sim_in_transfer) {
 		if (aux->aux_bridge && aux->aux_bridge->transfer)
@@ -572,7 +581,7 @@ static ssize_t dp_aux_transfer_debug(struct drm_dp_aux *drm_aux,
 				drm_aux, msg);
 		aux->sim_in_transfer = false;
 	}
-
+end:
 	return size;
 }