[media] V4L: soc-camera: add enum-frame-size ioctl

add vidioc_enum_framesizes implementation, follow default_g_parm()
and g_mbus_fmt() method

Signed-off-by: Qing Xu <qingx@marvell.com>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/media/video/soc_camera.c

@@ -191,6 +191,15 @@ 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);
+
+	return ici->ops->enum_fsizes(icd, fsize);
+}
+
 static int soc_camera_reqbufs(struct file *file, void *priv,
 			      struct v4l2_requestbuffers *p)
 {
@@ -1175,6 +1184,31 @@ 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);
+	const struct soc_camera_format_xlate *xlate;
+	__u32 pixfmt = fsize->pixel_format;
+	struct v4l2_frmsizeenum fsize_mbus = *fsize;
+
+	xlate = soc_camera_xlate_by_fourcc(icd, pixfmt);
+	if (!xlate)
+		return -EINVAL;
+	/* map xlate-code to pixel_format, sensor only handle xlate-code*/
+	fsize_mbus.pixel_format = xlate->code;
+
+	ret = v4l2_subdev_call(sd, video, enum_mbus_fsizes, &fsize_mbus);
+	if (ret < 0)
+		return ret;
+
+	*fsize = fsize_mbus;
+	fsize->pixel_format = pixfmt;
+
+	return 0;
+}
+
 static void soc_camera_device_init(struct device *dev, void *pdata)
 {
 	dev->platform_data	= pdata;
@@ -1210,6 +1244,8 @@ 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) {
@@ -1317,6 +1353,7 @@ 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,

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;