2024-05-09 17:40:03

by Barnabás Czémán

Subject: [PATCH] drm/msm/dpu: fix encoder irq wait skip

The irq_idx is unsigned so it cannot be lower than zero, better
to change the condition to check if it is equal with zero.
It could not cause any issue because a valid irq index starts from one.

Signed-off-by: Barnabás Czémán <[email protected]>
---
drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
index 119f3ea50a7c..cf7d769ab3b9 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
@@ -428,7 +428,7 @@ int dpu_encoder_helper_wait_for_irq(struct dpu_encoder_phys *phys_enc,
return -EWOULDBLOCK;
}

- if (irq_idx < 0) {
+ if (irq_idx == 0) {
DRM_DEBUG_KMS("skip irq wait id=%u, callback=%ps\n",
DRMID(phys_enc->parent), func);
return 0;

---
base-commit: 704ba27ac55579704ba1289392448b0c66b56258
change-id: 20240509-irq_wait-49444cea77e2

Best regards,
--
Barnabás Czémán <[email protected]>

2024-05-09 19:27:32

by Abhinav Kumar

Subject: Re: [PATCH] drm/msm/dpu: fix encoder irq wait skip

On 5/9/2024 10:39 AM, Barnabás Czémán wrote:
> The irq_idx is unsigned so it cannot be lower than zero, better
> to change the condition to check if it is equal with zero.
> It could not cause any issue because a valid irq index starts from one.
>
> Signed-off-by: Barnabás Czémán <[email protected]>
> ---
> drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c | 2 +-
> 1 file changed, 1 insertion(+), 1 deletion(-)
>

I think we also need

Fixes: 5a9d50150c2c ("drm/msm/dpu: shift IRQ indices by 1")

With that,

Reviewed-by: Abhinav Kumar <[email protected]>

> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> index 119f3ea50a7c..cf7d769ab3b9 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder.c
> @@ -428,7 +428,7 @@ int dpu_encoder_helper_wait_for_irq(struct dpu_encoder_phys *phys_enc,
> return -EWOULDBLOCK;
> }
>
> - if (irq_idx < 0) {
> + if (irq_idx == 0) {
> DRM_DEBUG_KMS("skip irq wait id=%u, callback=%ps\n",
> DRMID(phys_enc->parent), func);
> return 0;
>
> ---
> base-commit: 704ba27ac55579704ba1289392448b0c66b56258
> change-id: 20240509-irq_wait-49444cea77e2
>
> Best regards,