linux-kernel - Re: [PATCH v2 04/15] [media] mtk-mipicsi: add color format support for mt2712

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Date:   Thu, 18 Apr 2019 09:39:44 +0800
From:   CK Hu <ck.hu@...iatek.com>
To:     Stu Hsieh <stu.hsieh@...iatek.com>
CC:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        "Matthias Brugger" <matthias.bgg@...il.com>,
        <linux-media@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>, <srv_heupstream@...iatek.com>
Subject: Re: [PATCH v2 04/15] [media] mtk-mipicsi: add color format support
 for mt2712

Hi, Stu:

On Tue, 2019-04-16 at 17:30 +0800, Stu Hsieh wrote:
> This patch add color format support for mt2712

Without this patch, I think this driver still support these color
format. In this patch, you just check for the non-supported color
format.

Regards,
CK

> 
> Signed-off-by: Stu Hsieh <stu.hsieh@...iatek.com>
> ---
>  .../media/platform/mtk-mipicsi/mtk_mipicsi.c  | 20 +++++++++++++++++++
>  1 file changed, 20 insertions(+)
> 
> diff --git a/drivers/media/platform/mtk-mipicsi/mtk_mipicsi.c b/drivers/media/platform/mtk-mipicsi/mtk_mipicsi.c
> index ec4f6b503b32..16f6bc480f4e 100644
> --- a/drivers/media/platform/mtk-mipicsi/mtk_mipicsi.c
> +++ b/drivers/media/platform/mtk-mipicsi/mtk_mipicsi.c
> @@ -138,6 +138,20 @@ static void mtk_mipicsi_remove_device(struct soc_camera_device *icd)
>  	(void)pm_runtime_put_sync(icd->parent);
>  }
>  
> +static bool is_supported(const u32 pixformat)
> +{
> +	switch (pixformat) {
> +	/* YUV422 */
> +	case V4L2_PIX_FMT_YUYV:
> +	case V4L2_PIX_FMT_UYVY:
> +	case V4L2_PIX_FMT_YVYU:
> +	case V4L2_PIX_FMT_VYUY:
> +		return true;
> +	}
> +
> +	return false;
> +}
> +
>  static int mtk_mipicsi_set_fmt(struct soc_camera_device *icd,
>  				struct v4l2_format *f)
>  {
> @@ -153,6 +167,12 @@ static int mtk_mipicsi_set_fmt(struct soc_camera_device *icd,
>  	struct v4l2_mbus_framefmt *mf = &format.format;
>  	int ret = 0;
>  
> +	if (!is_supported(pix->pixelformat)) {
> +		dev_err(dev, "Format %x not support. set V4L2_PIX_FMT_YUYV as default\n",
> +			pix->pixelformat);
> +		pix->pixelformat = V4L2_PIX_FMT_YUYV;
> +	}
> +
>  	xlate = soc_camera_xlate_by_fourcc(icd, pix->pixelformat);
>  	if (xlate == NULL) {
>  		dev_err(dev, "Format 0x%x not found\n", pix->pixelformat);