drm/msm/dsi: check return value for video done waits

Check for the return value of wait for video
done waits and print appropriate error message.

Signed-off-by: Abhinav Kumar <abhinavk@codeaurora.org>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Rob Clark <robdclark@gmail.com>

diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c
index 7a03a94..93a3cdd 100644 (file)
--- a/drivers/gpu/drm/msm/dsi/dsi_host.c
+++ b/drivers/gpu/drm/msm/dsi/dsi_host.c
@@ -986,13 +986,19 @@ static void dsi_set_tx_power_mode(int mode, struct msm_dsi_host *msm_host)
 
 static void dsi_wait4video_done(struct msm_dsi_host *msm_host)
 {
+       u32 ret = 0;
+       struct device *dev = &msm_host->pdev->dev;
+
        dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_VIDEO_DONE, 1);
 
        reinit_completion(&msm_host->video_comp);
 
-       wait_for_completion_timeout(&msm_host->video_comp,
+       ret = wait_for_completion_timeout(&msm_host->video_comp,
                        msecs_to_jiffies(70));
 
+       if (ret <= 0)
+               dev_err(dev, "wait for video done timed out\n");
+
        dsi_intr_ctrl(msm_host, DSI_IRQ_MASK_VIDEO_DONE, 0);
 }