linux-kernel - Re: [RFC V1 4/8] smi2021: Add smi2021

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Message-Id: <201303201110.57579.hverkuil@xs4all.nl>
Date:	Wed, 20 Mar 2013 11:10:57 +0100
From:	Hans Verkuil <hverkuil@...all.nl>
To:	Jon Arne Jørgensen <jonarne@...arne.no>
Cc:	linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
	elezegarcia@...il.com
Subject: Re: [RFC V1 4/8] smi2021: Add smi2021_v4l2.c

On Wed 20 March 2013 10:48:42 Jon Arne Jørgensen wrote:
> On Mon, Mar 18, 2013 at 09:29:07AM +0100, Hans Verkuil wrote:
> > On Thu March 14 2013 15:07:00 Jon Arne Jørgensen wrote:
> > > This file is responsible for registering the device with the v4l2 subsystem,
> > > and the communication with v4l2.
> > > Most of the v4l2 ioctls are just passed on to vidbuf2.
> > > 
> > > Signed-off-by: Jon Arne Jørgensen <jonarne@...arne.no>
> > > ---
> > >  drivers/media/usb/smi2021/smi2021_v4l2.c | 566 +++++++++++++++++++++++++++++++
> > >  1 file changed, 566 insertions(+)
> > >  create mode 100644 drivers/media/usb/smi2021/smi2021_v4l2.c
> > > 
> > > diff --git a/drivers/media/usb/smi2021/smi2021_v4l2.c b/drivers/media/usb/smi2021/smi2021_v4l2.c
> > > new file mode 100644
> > > index 0000000..d402093
> > > --- /dev/null
> > > +++ b/drivers/media/usb/smi2021/smi2021_v4l2.c
> > > @@ -0,0 +1,566 @@
> > 
> > ...
> > 
> > > +int smi2021_vb2_setup(struct smi2021_dev *dev)
> > > +{
> > > +	int rc;
> > > +	struct vb2_queue *q;
> > > +
> > > +	q = &dev->vb_vidq;
> > > +	q->type = V4L2_BUF_TYPE_VIDEO_CAPTURE;
> > > +	q->io_modes = VB2_READ | VB2_MMAP | VB2_USERPTR;
> > > +	q->drv_priv = dev;
> > > +	q->buf_struct_size = sizeof(struct smi2021_buffer);
> > > +	q->ops = &smi2021_video_qops;
> > > +	q->mem_ops = &vb2_vmalloc_memops;
> > 
> > q->timestamp_type isn't filled in.
> >
> I'll add that
>  
> > For that matter, neither the sequence number nor the timestamp are filled in
> > in v4l2_buffer during capturing.
> > 
> > You need to add a buf_finish op to fill those in (use v4l2_timestamp() for the
> > timestamp).
> >
> 
> I'm filling these variables in the smi2021_buffer_done function in
> smi2021_video.c?

Ah, I missed that. Sorry about that.

Just replace gettimeofday with v4l2_timestamp(), though. We no longer use
gettimeofday() in new drivers, but instead we use the monotonic clock.

Regards,

	Hans

> Should I do that somewhere else?
> 
>  
> > Regards,
> > 
> > 	Hans
> > --
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