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[media] mt9v032: Provide pixel rate control 

Provide pixel rate control calculated from external clock and horizontal
binning factor.

Signed-off-by: Sakari Ailus <sakari.ailus@iki.fi>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
This commit is contained in:
Sakari Ailus 2012-03-15 18:01:39 -03:00 committed by Mauro Carvalho Chehab
parent 03d5285b8b
commit 41a33a00e8
1 changed files with 25 additions and 2 deletions
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27
drivers/media/i2c/mt9v032.c
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@ -122,6 +122,7 @@ struct mt9v032 {
struct v4l2_mbus_framefmt format;
struct v4l2_rect crop;
struct v4l2_ctrl *pixel_rate;
struct v4l2_ctrl_handler ctrls;
struct mutex power_lock;
@ -187,13 +188,15 @@ mt9v032_update_aec_agc(struct mt9v032 *mt9v032, u16 which, int enable)
return 0;
}
#define EXT_CLK 25000000
static int mt9v032_power_on(struct mt9v032 *mt9v032)
{
struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev);
int ret;
if (mt9v032->pdata->set_clock) {
mt9v032->pdata->set_clock(&mt9v032->subdev, 25000000);
mt9v032->pdata->set_clock(&mt9v032->subdev, EXT_CLK);
udelay(1);
}
@ -365,6 +368,17 @@ static int mt9v032_get_format(struct v4l2_subdev *subdev,
return 0;
}
static void mt9v032_configure_pixel_rate(struct mt9v032 *mt9v032,
unsigned int hratio)
{
struct i2c_client *client = v4l2_get_subdevdata(&mt9v032->subdev);
int ret;
ret = v4l2_ctrl_s_ctrl_int64(mt9v032->pixel_rate, EXT_CLK / hratio);
if (ret < 0)
dev_warn(&client->dev, "failed to set pixel rate (%d)\n", ret);
}
static int mt9v032_set_format(struct v4l2_subdev *subdev,
struct v4l2_subdev_fh *fh,
struct v4l2_subdev_format *format)
@ -395,6 +409,8 @@ static int mt9v032_set_format(struct v4l2_subdev *subdev,
format->which);
__format->width = __crop->width / hratio;
__format->height = __crop->height / vratio;
if (format->which == V4L2_SUBDEV_FORMAT_ACTIVE)
mt9v032_configure_pixel_rate(mt9v032, hratio);
format->format = *__format;
@ -450,6 +466,8 @@ static int mt9v032_set_crop(struct v4l2_subdev *subdev,
crop->which);
__format->width = rect.width;
__format->height = rect.height;
if (crop->which == V4L2_SUBDEV_FORMAT_ACTIVE)
mt9v032_configure_pixel_rate(mt9v032, 1);
}
*__crop = rect;
@ -598,6 +616,8 @@ static int mt9v032_registered(struct v4l2_subdev *subdev)
dev_info(&client->dev, "MT9V032 detected at address 0x%02x\n",
client->addr);
mt9v032_configure_pixel_rate(mt9v032, 1);
return ret;
}
@ -681,7 +701,7 @@ static int mt9v032_probe(struct i2c_client *client,
mutex_init(&mt9v032->power_lock);
mt9v032->pdata = client->dev.platform_data;
v4l2_ctrl_handler_init(&mt9v032->ctrls, ARRAY_SIZE(mt9v032_ctrls) + 4);
v4l2_ctrl_handler_init(&mt9v032->ctrls, ARRAY_SIZE(mt9v032_ctrls) + 5);
v4l2_ctrl_new_std(&mt9v032->ctrls, &mt9v032_ctrl_ops,
V4L2_CID_AUTOGAIN, 0, 1, 1, 1);
@ -695,6 +715,9 @@ static int mt9v032_probe(struct i2c_client *client,
V4L2_CID_EXPOSURE, MT9V032_TOTAL_SHUTTER_WIDTH_MIN,
MT9V032_TOTAL_SHUTTER_WIDTH_MAX, 1,
MT9V032_TOTAL_SHUTTER_WIDTH_DEF);
mt9v032->pixel_rate =
v4l2_ctrl_new_std(&mt9v032->ctrls, &mt9v032_ctrl_ops,
V4L2_CID_PIXEL_RATE, 0, 0, 1, 0);
for (i = 0; i < ARRAY_SIZE(mt9v032_ctrls); ++i)
v4l2_ctrl_new_custom(&mt9v032->ctrls, &mt9v032_ctrls[i], NULL);