[PATCHv8 13/26] v4l: vivi: support for dmabuf importing

[Hans Verkuil]

On Tue August 14 2012 17:34:43 Tomasz Stanislawski wrote:
> This patch enhances VIVI driver with a support for importing a buffer
> from DMABUF file descriptors.

Thanks for adding DMABUF support to vivi.

What would be great is if DMABUF support is also added to mem2mem_testdev.
It would make an excellent test case to take the vivi output, pass it
through mem2mem_testdev, and finally output the image using the gpu, all
using dmabuf.

It's also very useful for application developers to test dmabuf support
without requiring special hardware (other than a dmabuf-enabled gpu
driver).

Regards,

	Hans

> 
> Signed-off-by: Tomasz Stanislawski <t.stanislaws at samsung.com>
> Signed-off-by: Kyungmin Park <kyungmin.park at samsung.com>
> ---
>  drivers/media/video/Kconfig |    1 +
>  drivers/media/video/vivi.c  |    2 +-
>  2 files changed, 2 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/media/video/Kconfig b/drivers/media/video/Kconfig
> index 966954d..8fa81be 100644
> --- a/drivers/media/video/Kconfig
> +++ b/drivers/media/video/Kconfig
> @@ -653,6 +653,7 @@ config VIDEO_VIVI
>  	depends on FRAMEBUFFER_CONSOLE || STI_CONSOLE
>  	select FONT_8x16
>  	select VIDEOBUF2_VMALLOC
> +	select DMA_SHARED_BUFFER
>  	default n
>  	---help---
>  	  Enables a virtual video driver. This device shows a color bar
> diff --git a/drivers/media/video/vivi.c b/drivers/media/video/vivi.c
> index a6351c4..37d8fd4 100644
> --- a/drivers/media/video/vivi.c
> +++ b/drivers/media/video/vivi.c
> @@ -1308,7 +1308,7 @@ static int __init vivi_create_instance(int inst)
>  	q = &dev->vb_vidq;
>  	memset(q, 0, sizeof(dev->vb_vidq));
>  	q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
> -	q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_READ;
> +	q->io_modes = VB2_MMAP | VB2_USERPTR | VB2_DMABUF | VB2_READ;
>  	q->drv_priv = dev;
>  	q->buf_struct_size = sizeof(struct vivi_buffer);
>  	q->ops = &vivi_video_qops;
>