On 06/29/2016 04:17 AM, Ezequiel Garcia wrote:
> Now that the frame rate can be properly set, this commit adds support
> for S_PARM and G_PARM.
As mentioned in our irc discussion you also need to add
enum_framesize/intervals.
Otherwise applications won't know what values to use with s_parm.
>
> Signed-off-by: Ezequiel Garcia <ezequ...@vanguardiasur.com.ar>
> ---
> drivers/media/pci/tw686x/tw686x-video.c | 46
> ++++++++++++++++++++++++++++++---
> 1 file changed, 43 insertions(+), 3 deletions(-)
>
> diff --git a/drivers/media/pci/tw686x/tw686x-video.c
> b/drivers/media/pci/tw686x/tw686x-video.c
> index 3131f9305313..40b5b835d452 100644
> --- a/drivers/media/pci/tw686x/tw686x-video.c
> +++ b/drivers/media/pci/tw686x/tw686x-video.c
> @@ -437,9 +437,6 @@ static void tw686x_set_framerate(struct
> tw686x_video_channel *vc,
> {
> unsigned int i;
>
> - if (vc->fps == fps)
> - return;
> -
> i = tw686x_fps_idx(fps, TW686X_MAX_FPS(vc->video_standard));
> reg_write(vc->dev, VIDEO_FIELD_CTRL[vc->ch], fps_map[i]);
> vc->fps = tw686x_real_fps(i, TW686X_MAX_FPS(vc->video_standard));
> @@ -843,6 +840,12 @@ static int tw686x_s_std(struct file *file, void *priv,
> v4l2_std_id id)
> ret = tw686x_g_fmt_vid_cap(file, priv, &f);
> if (!ret)
> tw686x_s_fmt_vid_cap(file, priv, &f);
> +
> + /*
> + * Frame decimation depends on the chosen standard,
> + * so reset it to the current value.
> + */
> + tw686x_set_framerate(vc, vc->fps);
> return 0;
> }
>
> @@ -912,6 +915,40 @@ static int tw686x_g_std(struct file *file, void *priv,
> v4l2_std_id *id)
> return 0;
> }
>
> +static int tw686x_g_parm(struct file *file, void *priv,
> + struct v4l2_streamparm *sp)
> +{
> + struct tw686x_video_channel *vc = video_drvdata(file);
> + struct v4l2_captureparm *cp = &sp->parm.capture;
> +
> + if (sp->type != V4L2_BUF_TYPE_VIDEO_CAPTURE)
> + return -EINVAL;
You need this check in s_parm as well.
> + sp->parm.capture.readbuffers = 3;
> +
> + cp->capability = V4L2_CAP_TIMEPERFRAME;
> + cp->timeperframe.numerator = 1;
> + cp->timeperframe.denominator = vc->fps;
> + return 0;
> +}
> +
> +static int tw686x_s_parm(struct file *file, void *priv,
> + struct v4l2_streamparm *sp)
> +{
> + struct tw686x_video_channel *vc = video_drvdata(file);
> + struct v4l2_captureparm *cp = &sp->parm.capture;
> + unsigned int denominator = cp->timeperframe.denominator;
> + unsigned int numerator = cp->timeperframe.numerator;
> + unsigned int fps;
> +
> + if (vb2_is_busy(&vc->vidq))
> + return -EBUSY;
> +
> + fps = (!numerator || !denominator) ? 0 : denominator / numerator;
> + if (vc->fps != fps)
> + tw686x_set_framerate(vc, fps);
> + return tw686x_g_parm(file, priv, sp);
> +}
> +
> static int tw686x_enum_fmt_vid_cap(struct file *file, void *priv,
> struct v4l2_fmtdesc *f)
> {
> @@ -998,6 +1035,9 @@ static const struct v4l2_ioctl_ops
> tw686x_video_ioctl_ops = {
> .vidioc_g_std = tw686x_g_std,
> .vidioc_s_std = tw686x_s_std,
>
> + .vidioc_g_parm = tw686x_g_parm,
> + .vidioc_s_parm = tw686x_s_parm,
> +
> .vidioc_enum_input = tw686x_enum_input,
> .vidioc_g_input = tw686x_g_input,
> .vidioc_s_input = tw686x_s_input,
>
Regards,
Hans
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