diff mbox series

[v2,13/14] drm/msm/a6xx: Vastly increase HFI timeout

Message ID 20230628-topic-a7xx_drmmsm-v2-13-1439e1b2343f@linaro.org (mailing list archive)
State Superseded
Headers show
Series A7xx support | expand

Commit Message

Konrad Dybcio Aug. 8, 2023, 9:02 p.m. UTC 
A7xx GMUs can be slow as molasses at times.
Increase the timeout to 1 second to match the vendor driver.

Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8550-QRD
Tested-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> # sm8450
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
---
 drivers/gpu/drm/msm/adreno/a6xx_hfi.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Rob Clark Aug. 9, 2023, 10:15 p.m. UTC | #1 
On Tue, Aug 8, 2023 at 2:03 PM Konrad Dybcio <konrad.dybcio@linaro.org> wrote:
>
> A7xx GMUs can be slow as molasses at times.
> Increase the timeout to 1 second to match the vendor driver.
>
> Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8550-QRD
> Tested-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org> # sm8450
> Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
> ---
>  drivers/gpu/drm/msm/adreno/a6xx_hfi.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/gpu/drm/msm/adreno/a6xx_hfi.c b/drivers/gpu/drm/msm/adreno/a6xx_hfi.c
> index cdb3f6e74d3e..e25ddb82a087 100644
> --- a/drivers/gpu/drm/msm/adreno/a6xx_hfi.c
> +++ b/drivers/gpu/drm/msm/adreno/a6xx_hfi.c
> @@ -108,7 +108,7 @@ static int a6xx_hfi_wait_for_ack(struct a6xx_gmu *gmu, u32 id, u32 seqnum,
>
>         /* Wait for a response */
>         ret = gmu_poll_timeout(gmu, REG_A6XX_GMU_GMU2HOST_INTR_INFO, val,
> -               val & A6XX_GMU_GMU2HOST_INTR_INFO_MSGQ, 100, 5000);
> +               val & A6XX_GMU_GMU2HOST_INTR_INFO_MSGQ, 100, 1000000);

yikes.. so our default autosuspend delay is 66ms.. and we hit this
path in the resume path (ie. if you click something after things have
been sitting idle for >66ms).. you really don't want something in that
critical path to take 1sec

BR,
-R

>
>         if (ret) {
>                 DRM_DEV_ERROR(gmu->dev,
>
> --
> 2.41.0
>
diff mbox series

Patch

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_hfi.c b/drivers/gpu/drm/msm/adreno/a6xx_hfi.c
index cdb3f6e74d3e..e25ddb82a087 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_hfi.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_hfi.c
@@ -108,7 +108,7 @@  static int a6xx_hfi_wait_for_ack(struct a6xx_gmu *gmu, u32 id, u32 seqnum,
 
 	/* Wait for a response */
 	ret = gmu_poll_timeout(gmu, REG_A6XX_GMU_GMU2HOST_INTR_INFO, val,
-		val & A6XX_GMU_GMU2HOST_INTR_INFO_MSGQ, 100, 5000);
+		val & A6XX_GMU_GMU2HOST_INTR_INFO_MSGQ, 100, 1000000);
 
 	if (ret) {
 		DRM_DEV_ERROR(gmu->dev,