Commit 95904d4b authored by Andrew Chew's avatar Andrew Chew Committed by Mauro Carvalho Chehab
Browse files

[media] V4L: ov9740: Add suspend/resume 



On suspend, remember whether we are streaming or not, and at what frame format,
so that on resume, we can start streaming again.

Signed-off-by: default avatarAndrew Chew <achew@nvidia.com>
Signed-off-by: default avatarGuennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@redhat.com>
parent e29c9bfb

drivers/media/video/ov9740.c

+28 −0
Original line number Diff line number Diff line
@@ -201,6 +201,10 @@ struct ov9740_priv { 


	bool				flag_vflip;

	bool				flag_hflip;



	/* For suspend/resume. */

	struct v4l2_mbus_framefmt	current_mf;

	bool				current_enable;

};



static const struct ov9740_reg ov9740_defaults[] = {
@@ -551,6 +555,8 @@ static int ov9740_s_stream(struct v4l2_subdev *sd, int enable) 
					       0x00);

	}



	priv->current_enable = enable;



	return ret;

}
@@ -702,6 +708,7 @@ static int ov9740_s_fmt(struct v4l2_subdev *sd, 
			struct v4l2_mbus_framefmt *mf)

{

	struct i2c_client *client = v4l2_get_subdevdata(sd);

	struct ov9740_priv *priv = to_ov9740(sd);

	enum v4l2_colorspace cspace;

	enum v4l2_mbus_pixelcode code = mf->code;

	int ret;
@@ -728,6 +735,8 @@ static int ov9740_s_fmt(struct v4l2_subdev *sd, 
	mf->code	= code;

	mf->colorspace	= cspace;



	memcpy(&priv->current_mf, mf, sizeof(struct v4l2_mbus_framefmt));



	return ret;

}
@@ -829,6 +838,24 @@ static int ov9740_g_chip_ident(struct v4l2_subdev *sd, 
	return 0;

}



static int ov9740_s_power(struct v4l2_subdev *sd, int on)

{

	struct ov9740_priv *priv = to_ov9740(sd);



	if (!priv->current_enable)

		return 0;



	if (on) {

		ov9740_s_fmt(sd, &priv->current_mf);

		ov9740_s_stream(sd, priv->current_enable);

	} else {

		ov9740_s_stream(sd, 0);

		priv->current_enable = true;

	}



	return 0;

}



#ifdef CONFIG_VIDEO_ADV_DEBUG

static int ov9740_get_register(struct v4l2_subdev *sd,

			       struct v4l2_dbg_register *reg)
@@ -942,6 +969,7 @@ static struct v4l2_subdev_core_ops ov9740_core_ops = { 
	.g_ctrl			= ov9740_g_ctrl,

	.s_ctrl			= ov9740_s_ctrl,

	.g_chip_ident		= ov9740_g_chip_ident,

	.s_power		= ov9740_s_power,

#ifdef CONFIG_VIDEO_ADV_DEBUG

	.g_register		= ov9740_get_register,

	.s_register		= ov9740_set_register,