linux-kernel - Re: [PATCH] media:davinci:vpbe_display: Use platform_get

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Date:   Wed, 9 Mar 2022 11:14:07 +0000
From:   "Lad, Prabhakar" <prabhakar.csengg@...il.com>
To:     cgel.zte@...il.com
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media <linux-media@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Minghao Chi <chi.minghao@....com.cn>,
        Zeal Robot <zealci@....com.cn>
Subject: Re: [PATCH] media:davinci:vpbe_display: Use platform_get_irq() to get
 the interrupt

Hi Minghao,

Thank you for the patch.

On Wed, Mar 9, 2022 at 3:56 AM <cgel.zte@...il.com> wrote:
>
> From: Minghao Chi (CGEL ZTE) <chi.minghao@....com.cn>
>
> It is not recommened to use platform_get_resource(pdev, IORESOURCE_IRQ)
> for requesting IRQ's resources any more, as they can be not ready yet in
> case of DT-booting.
>
> platform_get_irq() instead is a recommended way for getting IRQ even if
> it was not retrieved earlier.
>
> It also makes code simpler because we're getting "int" value right away
> and no conversion from resource to int is required.
>
> Reported-by: Zeal Robot <zealci@....com.cn>
> Signed-off-by: Minghao Chi (CGEL ZTE) <chi.minghao@....com.cn>
> ---
>  drivers/media/platform/davinci/vpbe_display.c | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
>
NAK, vpbe_display driver doesn't use DT.

Cheers,
Prabhakar

> diff --git a/drivers/media/platform/davinci/vpbe_display.c b/drivers/media/platform/davinci/vpbe_display.c
> index bf3c3e76b921..e0aabcb333ac 100644
> --- a/drivers/media/platform/davinci/vpbe_display.c
> +++ b/drivers/media/platform/davinci/vpbe_display.c
> @@ -1363,7 +1363,6 @@ static int vpbe_display_probe(struct platform_device *pdev)
>  {
>         struct vpbe_display *disp_dev;
>         struct v4l2_device *v4l2_dev;
> -       struct resource *res = NULL;
>         struct vb2_queue *q;
>         int k;
>         int i;
> @@ -1405,14 +1404,13 @@ static int vpbe_display_probe(struct platform_device *pdev)
>                 }
>         }
>
> -       res = platform_get_resource(pdev, IORESOURCE_IRQ, 0);
> -       if (!res) {
> +       irq = platform_get_irq(pdev, 0);
> +       if (irq < 0) {
>                 v4l2_err(v4l2_dev, "Unable to get VENC interrupt resource\n");
>                 err = -ENODEV;
>                 goto probe_out;
>         }
>
> -       irq = res->start;
>         err = devm_request_irq(&pdev->dev, irq, venc_isr, 0,
>                                VPBE_DISPLAY_DRIVER, disp_dev);
>         if (err) {
> --
> 2.25.1
>