[Linaro-mm-sig] [RFCv1 2/4] v4l:vb2: add support for shared buffer (dma_buf)

[Tomasz Stanislawski]

>>
>> IMO, One way to do this is adding field 'struct device *dev' to struct
>> vb2_queue. This field should be filled by a driver prior to calling
>> vb2_queue_init.
>
> I haven't looked into the details, but that sounds good to me. Do we have use
> cases where a queue is allocated before knowing which physical device it will
> be used for ?
>

I don't think so. In case of S5P drivers, vb2_queue_init is called while 
opening /dev/videoX.

BTW. This struct device may help vb2 to produce logs with more 
descriptive client annotation.

What happens if such a device is NULL. It would happen for vmalloc 
allocator used by VIVI?

Regards,
Tomasz Stanislawski