[PATCH] drm/msm/dpu: make "vblank timeout" more useful

[Dmitry Baryshkov]

We have several reports of vblank timeout messages. However after some
debugging it was found that there might be different causes to that.
Include the actual CTL_FLUSH value into the timeout message. This allows
us to identify the DPU block that gets stuck.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov at linaro.org>
---
 drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c
index d0f56c5c4cce..fb34067ab6af 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_vid.c
@@ -489,7 +489,7 @@ static int dpu_encoder_phys_vid_wait_for_commit_done(
 		(hw_ctl->ops.get_flush_register(hw_ctl) == 0),
 		msecs_to_jiffies(50));
 	if (ret <= 0) {
-		DPU_ERROR("vblank timeout\n");
+		DPU_ERROR("vblank timeout: %x\n", hw_ctl->ops.get_flush_register(hw_ctl));
 		return -ETIMEDOUT;
 	}
 

---
base-commit: 39676dfe52331dba909c617f213fdb21015c8d10
change-id: 20240106-fd-dpu-debug-timeout-e917f0bc8063

Best regards,
-- 
Dmitry Baryshkov <dmitry.baryshkov at linaro.org>