On Friday, November 25, 2011 12:00:31 Mauro Carvalho Chehab wrote:
> Em 22-11-2011 08:05, Hans Verkuil escreveu:
> > From: Hans Verkuil <hans.verk...@cisco.com>
> >
> > Signed-off-by: Hans Verkuil <hans.verk...@cisco.com>
> > ---
> > drivers/media/video/ivtv/ivtv-driver.h | 1 +
> > drivers/media/video/ivtv/ivtv-ioctl.c | 7 +++++--
> > drivers/media/video/ivtv/ivtv-streams.c | 14 ++++++++++++++
> > 3 files changed, 20 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/media/video/ivtv/ivtv-driver.h
> > b/drivers/media/video/ivtv/ivtv-driver.h
> > index 8f9cc17..06b9efd 100644
> > --- a/drivers/media/video/ivtv/ivtv-driver.h
> > +++ b/drivers/media/video/ivtv/ivtv-driver.h
> > @@ -331,6 +331,7 @@ struct ivtv_stream {
> > struct ivtv *itv; /* for ease of use */
> > const char *name; /* name of the stream */
> > int type; /* stream type */
> > + u32 caps; /* V4L2 capabilities */
> >
> > u32 id;
> > spinlock_t qlock; /* locks access to the queues */
> > diff --git a/drivers/media/video/ivtv/ivtv-ioctl.c
> > b/drivers/media/video/ivtv/ivtv-ioctl.c
> > index ecafa69..6be63e9 100644
> > --- a/drivers/media/video/ivtv/ivtv-ioctl.c
> > +++ b/drivers/media/video/ivtv/ivtv-ioctl.c
> > @@ -752,12 +752,15 @@ static int ivtv_s_register(struct file *file, void
> > *fh, struct v4l2_dbg_register
> >
> > static int ivtv_querycap(struct file *file, void *fh, struct
> > v4l2_capability *vcap)
> > {
> > - struct ivtv *itv = fh2id(fh)->itv;
> > + struct ivtv_open_id *id = fh2id(file->private_data);
> > + struct ivtv *itv = id->itv;
> > + struct ivtv_stream *s = &itv->streams[id->type];
> >
> > strlcpy(vcap->driver, IVTV_DRIVER_NAME, sizeof(vcap->driver));
> > strlcpy(vcap->card, itv->card_name, sizeof(vcap->card));
> > snprintf(vcap->bus_info, sizeof(vcap->bus_info), "PCI:%s",
> > pci_name(itv->pdev));
> > - vcap->capabilities = itv->v4l2_cap; /* capabilities */
> > + vcap->capabilities = itv->v4l2_cap | V4L2_CAP_DEVICE_CAPS;
>
> IMO, the right thing to do here would be:
>
> vcap->capabilities = V4L2_CAP_DEVICE_CAPS;
> for (i = 0; i < ARRAY_SIZE(ivtv_stream_info); i++)
> vcap->capabilities |= ivtv_stream_info[v4l2_caps];
This won't work actually. Which devices are available depends on more things
than just that array. It's not something I think needs to change.
> This avoids the risk of future patches adding new device_caps at the devices,
> but
> forgetting to update the physical device capabilities.
>
> Also, as the initial patches will be used as implementation reference by
> others,
> such implementation will be more effective than a "magic" set of features that
> may or may not match the union of all device capabilities.
I wouldn't use ivtv as a reference implementation (other than for cx18). vivi
however
is a very nice reference implementation these days.
As soon as this patch is in I'll also update v4l2-compliance.
Regards,
Hans
>
> > + vcap->device_caps = s->caps;
> > return 0;
> > }
> >
> > diff --git a/drivers/media/video/ivtv/ivtv-streams.c
> > b/drivers/media/video/ivtv/ivtv-streams.c
> > index e7794dc..4d4ae6e 100644
> > --- a/drivers/media/video/ivtv/ivtv-streams.c
> > +++ b/drivers/media/video/ivtv/ivtv-streams.c
> > @@ -78,60 +78,73 @@ static struct {
> > int num_offset;
> > int dma, pio;
> > enum v4l2_buf_type buf_type;
> > + u32 v4l2_caps;
> > const struct v4l2_file_operations *fops;
> > } ivtv_stream_info[] = {
> > { /* IVTV_ENC_STREAM_TYPE_MPG */
> > "encoder MPG",
> > VFL_TYPE_GRABBER, 0,
> > PCI_DMA_FROMDEVICE, 0, V4L2_BUF_TYPE_VIDEO_CAPTURE,
> > + V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_TUNER |
> > + V4L2_CAP_AUDIO | V4L2_CAP_READWRITE,
> > &ivtv_v4l2_enc_fops
> > },
> > { /* IVTV_ENC_STREAM_TYPE_YUV */
> > "encoder YUV",
> > VFL_TYPE_GRABBER, IVTV_V4L2_ENC_YUV_OFFSET,
> > PCI_DMA_FROMDEVICE, 0, V4L2_BUF_TYPE_VIDEO_CAPTURE,
> > + V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_TUNER |
> > + V4L2_CAP_AUDIO | V4L2_CAP_READWRITE,
> > &ivtv_v4l2_enc_fops
> > },
> > { /* IVTV_ENC_STREAM_TYPE_VBI */
> > "encoder VBI",
> > VFL_TYPE_VBI, 0,
> > PCI_DMA_FROMDEVICE, 0, V4L2_BUF_TYPE_VBI_CAPTURE,
> > + V4L2_CAP_VBI_CAPTURE | V4L2_CAP_SLICED_VBI_CAPTURE |
> > V4L2_CAP_TUNER |
> > + V4L2_CAP_AUDIO | V4L2_CAP_READWRITE,
> > &ivtv_v4l2_enc_fops
> > },
> > { /* IVTV_ENC_STREAM_TYPE_PCM */
> > "encoder PCM",
> > VFL_TYPE_GRABBER, IVTV_V4L2_ENC_PCM_OFFSET,
> > PCI_DMA_FROMDEVICE, 0, V4L2_BUF_TYPE_PRIVATE,
> > + V4L2_CAP_TUNER | V4L2_CAP_AUDIO | V4L2_CAP_READWRITE,
> > &ivtv_v4l2_enc_fops
> > },
> > { /* IVTV_ENC_STREAM_TYPE_RAD */
> > "encoder radio",
> > VFL_TYPE_RADIO, 0,
> > PCI_DMA_NONE, 1, V4L2_BUF_TYPE_PRIVATE,
> > + V4L2_CAP_RADIO | V4L2_CAP_TUNER,
> > &ivtv_v4l2_enc_fops
> > },
> > { /* IVTV_DEC_STREAM_TYPE_MPG */
> > "decoder MPG",
> > VFL_TYPE_GRABBER, IVTV_V4L2_DEC_MPG_OFFSET,
> > PCI_DMA_TODEVICE, 0, V4L2_BUF_TYPE_VIDEO_OUTPUT,
> > + V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_AUDIO | V4L2_CAP_READWRITE,
> > &ivtv_v4l2_dec_fops
> > },
> > { /* IVTV_DEC_STREAM_TYPE_VBI */
> > "decoder VBI",
> > VFL_TYPE_VBI, IVTV_V4L2_DEC_VBI_OFFSET,
> > PCI_DMA_NONE, 1, V4L2_BUF_TYPE_VBI_CAPTURE,
> > + V4L2_CAP_SLICED_VBI_CAPTURE | V4L2_CAP_READWRITE,
> > &ivtv_v4l2_enc_fops
> > },
> > { /* IVTV_DEC_STREAM_TYPE_VOUT */
> > "decoder VOUT",
> > VFL_TYPE_VBI, IVTV_V4L2_DEC_VOUT_OFFSET,
> > PCI_DMA_NONE, 1, V4L2_BUF_TYPE_VBI_OUTPUT,
> > + V4L2_CAP_SLICED_VBI_OUTPUT | V4L2_CAP_AUDIO |
> > V4L2_CAP_READWRITE,
> > &ivtv_v4l2_dec_fops
> > },
> > { /* IVTV_DEC_STREAM_TYPE_YUV */
> > "decoder YUV",
> > VFL_TYPE_GRABBER, IVTV_V4L2_DEC_YUV_OFFSET,
> > PCI_DMA_TODEVICE, 0, V4L2_BUF_TYPE_VIDEO_OUTPUT,
> > + V4L2_CAP_VIDEO_OUTPUT | V4L2_CAP_AUDIO | V4L2_CAP_READWRITE,
> > &ivtv_v4l2_dec_fops
> > }
> > };
> > @@ -149,6 +162,7 @@ static void ivtv_stream_init(struct ivtv *itv, int type)
> > s->itv = itv;
> > s->type = type;
> > s->name = ivtv_stream_info[type].name;
> > + s->caps = ivtv_stream_info[type].v4l2_caps;
> >
> > if (ivtv_stream_info[type].pio)
> > s->dma = PCI_DMA_NONE;
>
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