linux-kernel - Re: [PATCH v2 2/6] media: vsp1: Clean FRE interrupt status

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Message-ID: <12d6d0dc-bef2-45be-af42-393276a4c7ea@gmail.com>
Date: Tue, 25 Feb 2025 20:10:21 +0300
From: Sergey Shtylyov <sergei.shtylyov@...il.com>
To: Jacopo Mondi <jacopo.mondi+renesas@...asonboard.com>,
 Laurent Pinchart <laurent.pinchart@...asonboard.com>,
 Kieran Bingham <kieran.bingham+renesas@...asonboard.com>,
 Niklas Söderlund <niklas.soderlund@...natech.se>
Cc: linux-kernel@...r.kernel.org, linux-media@...r.kernel.org,
 linux-renesas-soc@...r.kernel.org
Subject: Re: [PATCH v2 2/6] media: vsp1: Clean FRE interrupt status

On 2/24/25 11:19 PM, Jacopo Mondi wrote:

> The VSPX generates "FRame End" (FRE) interrutps, one for each
> buffer transferred to the ISP.
> 
> Even if the FRE interrupt is not enabled, it is reported as active
> in the interrupt status register.
> 
> Make sure to clean it when handling the interrupt.
> 
> Signed-off-by: Jacopo Mondi <jacopo.mondi+renesas@...asonboard.com>
> ---
>  drivers/media/platform/renesas/vsp1/vsp1_drv.c | 3 ++-
>  1 file changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/media/platform/renesas/vsp1/vsp1_drv.c b/drivers/media/platform/renesas/vsp1/vsp1_drv.c
> index d13e9b31aa7cff8610ea196ae4de88ab22e44e0f..17ace4c6844d19aaafc27e79f016cc05091372bf 100644
> --- a/drivers/media/platform/renesas/vsp1/vsp1_drv.c
> +++ b/drivers/media/platform/renesas/vsp1/vsp1_drv.c
> @@ -69,7 +69,8 @@ static irqreturn_t vsp1_irq_handler(int irq, void *data)
>  				i, wpf->entity.pipe->underrun_count);
>  		}
>  
> -		if (status & VI6_WPF_IRQ_STA_DFE) {
> +		if (status & VI6_WPF_IRQ_STA_DFE ||
> +		    status & VI6_WPF_IRQ_STA_FRE) {

   Maybe:

		if (status & (VI6_WPF_IRQ_STA_DFE | VI6_WPF_IRQ_STA_FRE)) {

[...]

MBR, Sergey