linux-kernel - Re: [PATCH 8/9] staging: media: atomisp: disable all custom formats

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Date:   Fri, 29 May 2020 20:03:25 -0700
From:   Nathan Chancellor <natechancellor@...il.com>
To:     Arnd Bergmann <arnd@...db.de>
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        linux-media@...r.kernel.org, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org, clang-built-linux@...glegroups.com
Subject: Re: [PATCH 8/9] staging: media: atomisp: disable all custom formats

On Fri, May 29, 2020 at 10:00:30PM +0200, Arnd Bergmann wrote:
> clang points out the usage of an incorrect enum type in the
> list of supported image formats:
> 
> drivers/staging/media/atomisp/pci/atomisp_subdev.c:49:65: error: implicit conversion from enumeration type 'enum ia_css_frame_format' to different enumeration type 'enum atomisp_input_format' [-Werror,-Wenum-conversion]
>         { V4L2_MBUS_FMT_CUSTOM_NV21, 12, 12, CSS_FRAME_FORMAT_NV21, 0, CSS_FRAME_FORMAT_NV21 },
> drivers/staging/media/atomisp/pci/atomisp_subdev.c:49:39: error: implicit conversion from enumeration type 'enum ia_css_frame_format' to different enumeration type 'enum atomisp_input_format' [-Werror,-Wenum-conversion]
>         { V4L2_MBUS_FMT_CUSTOM_NV21, 12, 12, CSS_FRAME_FORMAT_NV21, 0, CSS_FRAME_FORMAT_NV21 },
>         { V4L2_MBUS_FMT_CUSTOM_NV12, 12, 12, CSS_FRAME_FORMAT_NV12, 0, CSS_FRAME_FORMAT_NV12 },
>         { MEDIA_BUS_FMT_JPEG_1X8, 8, 8, CSS_FRAME_FORMAT_BINARY_8, 0, ATOMISP_INPUT_FORMAT_BINARY_8 },
> 
> Checking the git history, I found a commit that disabled one such case
> because it did not work. It seems likely that the incorrect enum was
> part of the original problem and that the others do not work either,
> or have never been tested.
> 
> Disable all the ones that cause a warning.
> 
> Fixes: cb02ae3d71ea ("media: staging: atomisp: Disable custom format for now")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>

I have this patch in my local tree and debated sending it myself. I
think that this is the right fix for now, as the driver is being cleaned
up. Maybe add a FIXME like the rest of this driver?

Regardless of that last point:

Reviewed-by: Nathan Chancellor <natechancellor@...il.com>

> ---
>  drivers/staging/media/atomisp/pci/atomisp_subdev.c | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/drivers/staging/media/atomisp/pci/atomisp_subdev.c b/drivers/staging/media/atomisp/pci/atomisp_subdev.c
> index 46590129cbe3..8bce466cc128 100644
> --- a/drivers/staging/media/atomisp/pci/atomisp_subdev.c
> +++ b/drivers/staging/media/atomisp/pci/atomisp_subdev.c
> @@ -44,9 +44,11 @@ const struct atomisp_in_fmt_conv atomisp_in_fmt_conv[] = {
>  	{ MEDIA_BUS_FMT_SRGGB12_1X12, 12, 12, ATOMISP_INPUT_FORMAT_RAW_12, CSS_BAYER_ORDER_RGGB, CSS_FORMAT_RAW_12 },
>  	{ MEDIA_BUS_FMT_UYVY8_1X16, 8, 8, ATOMISP_INPUT_FORMAT_YUV422_8, 0, ATOMISP_INPUT_FORMAT_YUV422_8 },
>  	{ MEDIA_BUS_FMT_YUYV8_1X16, 8, 8, ATOMISP_INPUT_FORMAT_YUV422_8, 0, ATOMISP_INPUT_FORMAT_YUV422_8 },
> +#if 0
>  	{ MEDIA_BUS_FMT_JPEG_1X8, 8, 8, CSS_FRAME_FORMAT_BINARY_8, 0, ATOMISP_INPUT_FORMAT_BINARY_8 },
>  	{ V4L2_MBUS_FMT_CUSTOM_NV12, 12, 12, CSS_FRAME_FORMAT_NV12, 0, CSS_FRAME_FORMAT_NV12 },
>  	{ V4L2_MBUS_FMT_CUSTOM_NV21, 12, 12, CSS_FRAME_FORMAT_NV21, 0, CSS_FRAME_FORMAT_NV21 },
> +#endif
>  	{ V4L2_MBUS_FMT_CUSTOM_YUV420, 12, 12, ATOMISP_INPUT_FORMAT_YUV420_8_LEGACY, 0, ATOMISP_INPUT_FORMAT_YUV420_8_LEGACY },
>  #if 0
>  	{ V4L2_MBUS_FMT_CUSTOM_M10MO_RAW, 8, 8, CSS_FRAME_FORMAT_BINARY_8, 0, ATOMISP_INPUT_FORMAT_BINARY_8 },
> -- 
> 2.26.2
>