Re: [PATCH 03/14] [media] mtk-mipicsi: add color format support for mt2712

[CK Hu <ck.hu@mediatek.com>]

Hi, Stu:

On Mon, 2019-04-08 at 19:54 +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.

> 
> Signed-off-by: Stu Hsieh <stu.hsieh@mediatek.com>
> ---
>  .../media/platform/mtk-mipicsi/mtk_mipicsi.c  | 25 +++++++++++++++++++
>  1 file changed, 25 insertions(+)
> 
> diff --git a/drivers/media/platform/mtk-mipicsi/mtk_mipicsi.c b/drivers/media/platform/mtk-mipicsi/mtk_mipicsi.c
> index a5ed720df900..ccf2d18a3e74 100644
> --- a/drivers/media/platform/mtk-mipicsi/mtk_mipicsi.c
> +++ b/drivers/media/platform/mtk-mipicsi/mtk_mipicsi.c
> @@ -139,6 +139,25 @@ static void mtk_mipicsi_remove_device(struct soc_camera_device *icd)
>  	(void)pm_runtime_put_sync(icd->parent);
>  }
>  
> +static bool is_supported(struct soc_camera_device *icd, const u32 pixformat)

icd is useless, so remove it.

> +{
> +	bool ret = false;
> +
> +	switch (pixformat) {
> +	/* YUV422 */
> +	case V4L2_PIX_FMT_YUYV:
> +	case V4L2_PIX_FMT_UYVY:
> +	case V4L2_PIX_FMT_YVYU:
> +	case V4L2_PIX_FMT_VYUY:
> +		ret = true;

You could just return true.

> +		break;
> +	default:
> +		break;

You don't need the 'default' part.

> +	}
> +
> +	return ret;

You could just return false.

Regards,
CK

> +}
> +
>  static int mtk_mipicsi_set_fmt(struct soc_camera_device *icd,
>  				struct v4l2_format *f)
>  {
> @@ -154,6 +173,12 @@ static int mtk_mipicsi_set_fmt(struct soc_camera_device *icd,
>  	struct v4l2_mbus_framefmt *mf = &format.format;
>  	int ret = 0;
>  
> +	if (!is_supported(icd, 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);