Hi Jacopo,
On Wed, Aug 14, 2019 at 10:28:14PM +0200, Jacopo Mondi wrote:
> The camera location is retrieved from the firmware interface parsing
> the "location" device property and reported through the read-only
> V4L2_CID_LOCATION control.
>
> Signed-off-by: Jacopo Mondi <jacopo@xxxxxxxxxx>
> ---
> drivers/media/i2c/ov5670.c | 11 +++++++++++
> 1 file changed, 11 insertions(+)
>
> diff --git a/drivers/media/i2c/ov5670.c b/drivers/media/i2c/ov5670.c
> index 041fcbb4eebd..1446aef1fc1e 100644
> --- a/drivers/media/i2c/ov5670.c
> +++ b/drivers/media/i2c/ov5670.c
> @@ -2059,10 +2059,12 @@ static const struct v4l2_ctrl_ops ov5670_ctrl_ops = {
> /* Initialize control handlers */
> static int ov5670_init_controls(struct ov5670 *ov5670)
> {
> + struct i2c_client *client = v4l2_get_subdevdata(&ov5670->sd);
> struct v4l2_ctrl_handler *ctrl_hdlr;
> s64 vblank_max;
> s64 vblank_def;
> s64 vblank_min;
> + u32 location;
> s64 exposure_max;
> int ret;
>
> @@ -2124,6 +2126,15 @@ static int ov5670_init_controls(struct ov5670 *ov5670)
> ARRAY_SIZE(ov5670_test_pattern_menu) - 1,
> 0, 0, ov5670_test_pattern_menu);
>
> + ret = device_property_read_u32(&client->dev, "location", &location);
> + if (!ret) {
> + v4l2_ctrl_new_std(ctrl_hdlr, &ov5670_ctrl_ops,
> + V4L2_CID_LOCATION, V4L2_LOCATION_FRONT,
> + V4L2_LOCATION_BACK, 1,
> + location == V4L2_LOCATION_FRONT ?
To do this, you'll need to document that the control values match DT
binding values. I don't think that's there currently.
A switch would be nicer, to check that the value that is not front is
something else meaningful. Otherwise I wouldn't create the control at all.
A helper function for drivers to use would be nice.
> + V4L2_LOCATION_FRONT : V4L2_LOCATION_BACK);
> + }
> +
> if (ctrl_hdlr->error) {
> ret = ctrl_hdlr->error;
> goto error;
--
Regards,
Sakari Ailus
sakari.ailus@xxxxxxxxxxxxxxx
