linux-kernel - Re: [PATCH] [media] staging/imx: always select VIDEOBUF2_DMA

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Message-ID: <09143fe9-7034-4bd0-eb7b-9c896f7acf30@gmail.com>
Date:   Mon, 14 Aug 2017 16:15:50 -0700
From:   Steve Longerbeam <slongerbeam@...il.com>
To:     Arnd Bergmann <arnd@...db.de>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc:     Russell King <rmk+kernel@...linux.org.uk>,
        Hans Verkuil <hans.verkuil@...co.com>,
        linux-media@...r.kernel.org, devel@...verdev.osuosl.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] [media] staging/imx: always select VIDEOBUF2_DMA_CONTIG

Thanks,

Reviewed-by: Steve Longerbeam <steve_longerbeam@...tor.com>

Steve

On 08/07/2017 03:49 AM, Arnd Bergmann wrote:
> I ran into a rare build error during randconfig testing:
>
> drivers/staging/media/imx/imx-media-capture.o: In function `capture_stop_streaming':
> imx-media-capture.c:(.text+0x224): undefined reference to `vb2_buffer_done'
> drivers/staging/media/imx/imx-media-capture.o: In function `imx_media_capture_device_register':
> imx-media-capture.c:(.text+0xe60): undefined reference to `vb2_queue_init'
> imx-media-capture.c:(.text+0xfa0): undefined reference to `vb2_dma_contig_memops'
>
> While VIDEOBUF2_DMA_CONTIG was already selected by the camera driver,
> it wasn't necessarily there with just the base driver enabled.
> This moves the 'select' statement to the top-level option to make
> sure it's always available.
>
> Fixes: 64b5a49df486 ("[media] media: imx: Add Capture Device Interface")
> Signed-off-by: Arnd Bergmann <arnd@...db.de>
> ---
>   drivers/staging/media/imx/Kconfig | 2 +-
>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/drivers/staging/media/imx/Kconfig b/drivers/staging/media/imx/Kconfig
> index 719508fcb0e9..2be921cd0d55 100644
> --- a/drivers/staging/media/imx/Kconfig
> +++ b/drivers/staging/media/imx/Kconfig
> @@ -2,6 +2,7 @@ config VIDEO_IMX_MEDIA
>   	tristate "i.MX5/6 V4L2 media core driver"
>   	depends on MEDIA_CONTROLLER && VIDEO_V4L2 && ARCH_MXC && IMX_IPUV3_CORE
>   	depends on VIDEO_V4L2_SUBDEV_API
> +	select VIDEOBUF2_DMA_CONTIG
>   	select V4L2_FWNODE
>   	---help---
>   	  Say yes here to enable support for video4linux media controller
> @@ -13,7 +14,6 @@ menu "i.MX5/6 Media Sub devices"
>   config VIDEO_IMX_CSI
>   	tristate "i.MX5/6 Camera Sensor Interface driver"
>   	depends on VIDEO_IMX_MEDIA && VIDEO_DEV && I2C
> -	select VIDEOBUF2_DMA_CONTIG
>   	default y
>   	---help---
>   	  A video4linux camera sensor interface driver for i.MX5/6.