@@ -3847,6 +3847,8 @@ static int intel_dp_sink_crc_stop(struct intel_dp *intel_dp)
struct intel_crtc *intel_crtc = to_intel_crtc(dig_port->base.base.crtc);
u8 buf;
int ret = 0;
+ int count = 0;
+ int attempts = 10;
if (drm_dp_dpcd_readb(&intel_dp->aux, DP_TEST_SINK, &buf) < 0) {
DRM_DEBUG_KMS("Sink CRC couldn't be stopped properly\n");
@@ -3861,7 +3863,22 @@ static int intel_dp_sink_crc_stop(struct intel_dp *intel_dp)
goto out;
}
- intel_wait_for_vblank(dev, intel_crtc->pipe);
+ do {
+ intel_wait_for_vblank(dev, intel_crtc->pipe);
+
+ if (drm_dp_dpcd_readb(&intel_dp->aux,
+ DP_TEST_SINK_MISC, &buf) < 0) {
+ ret = -EIO;
+ goto out;
+ }
+ count = buf & DP_TEST_COUNT_MASK;
+ } while (--attempts && count);
+
+ if (attempts == 0) {
+ DRM_DEBUG_KMS("TIMEOUT: Sink CRC counter is not zeroed\n");
+ ret = -ETIMEDOUT;
+ }
+
intel_dp->sink_crc.started = false;
out:
hsw_enable_ips(intel_crtc);