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Commit 587a5765 authored by Hans Verkuil's avatar Hans Verkuil Committed by Mauro Carvalho Chehab
Browse files

[media] zr364xx: add suspend/resume support 



And fix initial control setup.

Signed-off-by: default avatarHans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent a065729d

drivers/media/video/zr364xx.c

+57 −12
Original line number Diff line number Diff line
@@ -196,6 +196,7 @@ struct zr364xx_camera { 


	const struct zr364xx_fmt *fmt;

	struct videobuf_queue	vb_vidq;

	bool was_streaming;

};



/* buffer for one video frame */
@@ -1119,20 +1120,10 @@ static inline int zr364xx_stop_acquire(struct zr364xx_camera *cam) 
	return 0;

}



static int zr364xx_vidioc_streamon(struct file *file, void *priv,

				   enum v4l2_buf_type type)

static int zr364xx_prepare(struct zr364xx_camera *cam)

{

	struct zr364xx_camera *cam = video_drvdata(file);

	int i, j;

	int res;



	DBG("%s\n", __func__);



	if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)

		return -EINVAL;



	if (cam->owner && cam->owner != priv)

		return -EBUSY;

	int i, j;



	for (i = 0; init[cam->method][i].size != -1; i++) {

		res = send_control_msg(cam->udev, 1, init[cam->method][i].value,
@@ -1153,6 +1144,27 @@ static int zr364xx_vidioc_streamon(struct file *file, void *priv, 
		cam->buffer.frame[j].ulState = ZR364XX_READ_IDLE;

		cam->buffer.frame[j].cur_size = 0;

	}

	v4l2_ctrl_handler_setup(&cam->ctrl_handler);

	return 0;

}



static int zr364xx_vidioc_streamon(struct file *file, void *priv,

				   enum v4l2_buf_type type)

{

	struct zr364xx_camera *cam = video_drvdata(file);

	int res;



	DBG("%s\n", __func__);



	if (type != V4L2_BUF_TYPE_VIDEO_CAPTURE)

		return -EINVAL;



	if (cam->owner && cam->owner != priv)

		return -EBUSY;



	res = zr364xx_prepare(cam);

	if (res)

		return res;

	res = videobuf_streamon(&cam->vb_vidq);

	if (res == 0) {

		zr364xx_start_acquire(cam);
@@ -1578,6 +1590,34 @@ static void zr364xx_disconnect(struct usb_interface *intf) 
}





#ifdef CONFIG_PM

static int zr364xx_suspend(struct usb_interface *intf, pm_message_t message)

{

	struct zr364xx_camera *cam = usb_get_intfdata(intf);



	cam->was_streaming = cam->b_acquire;

	if (!cam->was_streaming)

		return 0;

	zr364xx_stop_acquire(cam);

	zr364xx_stop_readpipe(cam);

	return 0;

}



static int zr364xx_resume(struct usb_interface *intf)

{

	struct zr364xx_camera *cam = usb_get_intfdata(intf);

	int res;



	if (!cam->was_streaming)

		return 0;



	zr364xx_start_readpipe(cam);

	res = zr364xx_prepare(cam);

	if (!res)

		zr364xx_start_acquire(cam);

	return res;

}

#endif



/**********************/

/* Module integration */
@@ -1587,6 +1627,11 @@ static struct usb_driver zr364xx_driver = { 
	.name = "zr364xx",

	.probe = zr364xx_probe,

	.disconnect = zr364xx_disconnect,

#ifdef CONFIG_PM

	.suspend = zr364xx_suspend,

	.resume = zr364xx_resume,

	.reset_resume = zr364xx_resume,

#endif

	.id_table = device_table

};