linux-kernel - Re: [PATCH] drm/msm/dpu: guard ctl irq callback register/unregister

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Date: Thu, 9 May 2024 12:14:19 -0700
From: Abhinav Kumar <quic_abhinavk@...cinc.com>
To: Barnabás Czémán <trabarni@...il.com>,
        Rob Clark
	<robdclark@...il.com>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        Sean
 Paul <sean@...rly.run>,
        Marijn Suijten <marijn.suijten@...ainline.org>,
        David
 Airlie <airlied@...il.com>, Daniel Vetter <daniel@...ll.ch>
CC: <linux-arm-msm@...r.kernel.org>, <dri-devel@...ts.freedesktop.org>,
        <freedreno@...ts.freedesktop.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] drm/msm/dpu: guard ctl irq callback register/unregister



On 5/9/2024 10:52 AM, Barnabás Czémán wrote:
> CTLs on older qualcomm SOCs like msm8953 and msm8996 has not got interrupts,
> so better to skip CTL irq callback register/unregister
> make dpu_ctl_cfg be able to define without intr_start.
> 

Thanks for the patch.

Have msm8953 and msm8996 migrated to DPU or is there a series planned to 
migrate them?

The change itself is correct but without the catalogs for those chipsets 
merged, we will never hit this path.


> Signed-off-by: Barnabás Czémán <trabarni@...il.com>
> ---
>   drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c | 4 ++--
>   1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
> index 489be1c0c704..250d83af53a4 100644
> --- a/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
> +++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_encoder_phys_cmd.c
> @@ -298,7 +298,7 @@ static void dpu_encoder_phys_cmd_irq_enable(struct dpu_encoder_phys *phys_enc)
>   				       phys_enc);
>   	dpu_encoder_phys_cmd_control_vblank_irq(phys_enc, true);
>   
> -	if (dpu_encoder_phys_cmd_is_master(phys_enc))
> +	if (dpu_encoder_phys_cmd_is_master(phys_enc) && phys_enc->irq[INTR_IDX_CTL_START])
>   		dpu_core_irq_register_callback(phys_enc->dpu_kms,
>   					       phys_enc->irq[INTR_IDX_CTL_START],
>   					       dpu_encoder_phys_cmd_ctl_start_irq,
> @@ -311,7 +311,7 @@ static void dpu_encoder_phys_cmd_irq_disable(struct dpu_encoder_phys *phys_enc)
>   					   phys_enc->hw_pp->idx - PINGPONG_0,
>   					   phys_enc->vblank_refcount);
>   
> -	if (dpu_encoder_phys_cmd_is_master(phys_enc))
> +	if (dpu_encoder_phys_cmd_is_master(phys_enc) && phys_enc->irq[INTR_IDX_CTL_START])
>   		dpu_core_irq_unregister_callback(phys_enc->dpu_kms,
>   						 phys_enc->irq[INTR_IDX_CTL_START]);
>   
> 
> ---
> base-commit: 704ba27ac55579704ba1289392448b0c66b56258
> change-id: 20240509-ctl_irq-a90b2d7a0bf5
> 
> Best regards,