On Mon, 17 Jan 2011, Qing Xu wrote:
> add vidioc_enum_framesizes implementation, follow default_g_parm()
> and g_mbus_fmt() method
>
> Signed-off-by: Qing Xu <[email protected]>
> ---
> drivers/media/video/soc_camera.c | 42
> ++++++++++++++++++++++++++++++++++++++
> include/media/soc_camera.h | 1 +
> include/media/v4l2-subdev.h | 2 +
> 3 files changed, 45 insertions(+), 0 deletions(-)
>
> diff --git a/drivers/media/video/soc_camera.c
> b/drivers/media/video/soc_camera.c
> index 052bd6d..35260a5 100644
> --- a/drivers/media/video/soc_camera.c
> +++ b/drivers/media/video/soc_camera.c
> @@ -145,6 +145,18 @@ static int soc_camera_s_std(struct file *file, void
> *priv, v4l2_std_id *a)
> return v4l2_subdev_call(sd, core, s_std, *a);
> }
>
> +static int soc_camera_enum_fsizes(struct file *file, void *fh,
> + struct v4l2_frmsizeenum *fsize)
> +{
> + struct soc_camera_device *icd = file->private_data;
> + struct soc_camera_host *ici = to_soc_camera_host(icd->dev.parent);
> +
> + if (ici->ops->enum_fsizes)
> + return ici->ops->enum_fsizes(icd, fsize);
> +
> + return -ENOIOCTLCMD;
Do you need this? We don't do this with other similar operations: if none
is provided by the user, we supply our own default, so, don't think we
need to check for NULL here.
> +}
> +
> static int soc_camera_reqbufs(struct file *file, void *priv,
> struct v4l2_requestbuffers *p)
> {
> @@ -1160,6 +1172,33 @@ static int default_s_parm(struct soc_camera_device
> *icd,
> return v4l2_subdev_call(sd, video, s_parm, parm);
> }
>
> +static int default_enum_fsizes(struct soc_camera_device *icd,
> + struct v4l2_frmsizeenum *fsize)
> +{
> + int ret;
> + struct v4l2_subdev *sd = soc_camera_to_subdev(icd);
> + struct v4l2_mbus_framefmt mf;
> + const struct soc_camera_format_xlate *xlate;
> + __u32 pixfmt = fsize->pixel_format;
> +
> + xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
> + if (!xlate) {
> + return -EINVAL;
> + }
Superfluous braces.
> +
> + mf.code = xlate->code;
> +
> + ret = v4l2_subdev_call(sd, video, enum_mbus_fsizes, &mf);
> + if (ret < 0)
> + return ret;
> +
> + fsize->discrete.height = mf.height;
> + fsize->discrete.width = mf.width;
> + fsize->type = V4L2_FRMSIZE_TYPE_DISCRETE;
Hmm, no, that's not quite what I meant. I meant something like this:
+ struct v4l2_frmsizeenum fsize_mbus = *fsize;
...
+ fsize_mbus.pixel_format = xlate->code;
+ ret = v4l2_subdev_call(sd, video, enum_mbus_fsizes, &fsize_mbus);
Of course, you'll have to change your prototypes in the header
respectively. With your solution you hard-code only one discrete size,
which doesn't seem like a good idea to me.
Thanks
Guennadi
> +
> + return 0;
> +}
> +
> static void soc_camera_device_init(struct device *dev, void *pdata)
> {
> dev->platform_data = pdata;
> @@ -1195,6 +1234,8 @@ int soc_camera_host_register(struct soc_camera_host
> *ici)
> ici->ops->set_parm = default_s_parm;
> if (!ici->ops->get_parm)
> ici->ops->get_parm = default_g_parm;
> + if (!ici->ops->enum_fsizes)
> + ici->ops->enum_fsizes = default_enum_fsizes;
>
> mutex_lock(&list_lock);
> list_for_each_entry(ix, &hosts, list) {
> @@ -1302,6 +1343,7 @@ static const struct v4l2_ioctl_ops soc_camera_ioctl_ops
> = {
> .vidioc_g_input = soc_camera_g_input,
> .vidioc_s_input = soc_camera_s_input,
> .vidioc_s_std = soc_camera_s_std,
> + .vidioc_enum_framesizes = soc_camera_enum_fsizes,
> .vidioc_reqbufs = soc_camera_reqbufs,
> .vidioc_try_fmt_vid_cap = soc_camera_try_fmt_vid_cap,
> .vidioc_querybuf = soc_camera_querybuf,
> diff --git a/include/media/soc_camera.h b/include/media/soc_camera.h
> index 86e3631..6e4800c 100644
> --- a/include/media/soc_camera.h
> +++ b/include/media/soc_camera.h
> @@ -85,6 +85,7 @@ struct soc_camera_host_ops {
> int (*set_ctrl)(struct soc_camera_device *, struct v4l2_control *);
> int (*get_parm)(struct soc_camera_device *, struct v4l2_streamparm *);
> int (*set_parm)(struct soc_camera_device *, struct v4l2_streamparm *);
> + int (*enum_fsizes)(struct soc_camera_device *, struct v4l2_frmsizeenum
> *);
> unsigned int (*poll)(struct file *, poll_table *);
> const struct v4l2_queryctrl *controls;
> int num_controls;
> diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h
> index b0316a7..d4e0d80 100644
> --- a/include/media/v4l2-subdev.h
> +++ b/include/media/v4l2-subdev.h
> @@ -275,6 +275,8 @@ struct v4l2_subdev_video_ops {
> struct v4l2_dv_timings *timings);
> int (*enum_mbus_fmt)(struct v4l2_subdev *sd, unsigned int index,
> enum v4l2_mbus_pixelcode *code);
> + int (*enum_mbus_fsizes)(struct v4l2_subdev *sd,
> + struct v4l2_mbus_framefmt *fmt);
> int (*g_mbus_fmt)(struct v4l2_subdev *sd,
> struct v4l2_mbus_framefmt *fmt);
> int (*try_mbus_fmt)(struct v4l2_subdev *sd,
> --
> 1.6.3.3
>
---
Guennadi Liakhovetski, Ph.D.
Freelance Open-Source Software Developer
http://www.open-technology.de/
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