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[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: Andrew Chew <achew@nvidia.com>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Andrew Chew 2011-06-23 20:19:44 -03:00 committed by Mauro Carvalho Chehab
parent e29c9bfb38
commit 95904d4b6a
1 changed files with 28 additions and 0 deletions
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28
drivers/media/video/ov9740.c
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@ -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,