linux-kernel - Re: [PATCH v4 1/2] media: davinci: vpif capture: upgrade the driver with v4l offerings

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Date:	Wed, 14 May 2014 20:26:30 +0200
From:	Hans Verkuil <hverkuil@...all.nl>
To:	Prabhakar Lad <prabhakar.csengg@...il.com>
CC:	LMML <linux-media@...r.kernel.org>,
	DLOS <davinci-linux-open-source@...ux.davincidsp.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v4 1/2] media: davinci: vpif capture: upgrade the driver
 with v4l offerings

On 05/14/2014 07:28 PM, Prabhakar Lad wrote:
> Hi Hans,
> 
> Thanks for the review.
> 
> On Mon, May 12, 2014 at 3:20 PM, Hans Verkuil <hverkuil@...all.nl> wrote:
>> Hi Prabhakar,
>>
>> Thanks for the patch, but I have a few comments...
>>
>> On 05/12/2014 10:58 AM, Lad, Prabhakar wrote:
>>> Buffer ioctls:
>>>         test VIDIOC_REQBUFS/CREATE_BUFS/QUERYBUF: OK
>>>                 fail: v4l2-test-buffers.cpp(506): q.has_expbuf()
>>
>> This is weird. I'm not sure why this happens since you seem to have VB2_DMABUF set
>> and also vb2_ioctl_expbuf.
>>
>>>         test VIDIOC_EXPBUF: FAIL
>>>
>>> Total: 38, Succeeded: 35, Failed: 3, Warnings: 0
>>
>> Also test with 'v4l2-compliance -s' (streaming). The '-i' option is available to
>> test streaming from a specific input.
>>
> BTW the output is with -s option set.

Something is wrong. With -s you should see something like this:

Buffer ioctls:
        test VIDIOC_REQBUFS/CREATE_BUFS/QUERYBUF: OK
        test VIDIOC_EXPBUF: OK (Not Supported)
        test read/write: OK
        test MMAP: OK                                     
        test USERPTR: OK                                  
        test DMABUF: Cannot test, specify --expbuf-device

Regards,

	Hans

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