Add support of V4L2_CID_LINK_FREQ, this is needed
by some CSI-2 receivers.
384MHz is exposed for the time being, corresponding
to 96MHz pixel clock with 2 bytes per pixel on 2 data lanes.
This setup has been tested successfully with ST MIPID02
CSI-2 to parallel bridge.
Signed-off-by: Hugues Fruchet <hugues.fruchet@xxxxxx>
---
version 2:
- do not set control read only as per Hans' comment:
See https://www.mail-archive.com/linux-media@xxxxxxxxxxxxxxx/msg147910.html
drivers/media/i2c/ov5640.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/media/i2c/ov5640.c b/drivers/media/i2c/ov5640.c
index 82d4ce9..e6307f3 100644
--- a/drivers/media/i2c/ov5640.c
+++ b/drivers/media/i2c/ov5640.c
@@ -218,6 +218,7 @@ struct ov5640_ctrls {
struct v4l2_ctrl *test_pattern;
struct v4l2_ctrl *hflip;
struct v4l2_ctrl *vflip;
+ struct v4l2_ctrl *link_freq;
};
struct ov5640_dev {
@@ -2198,6 +2199,10 @@ static int ov5640_try_fmt_internal(struct v4l2_subdev *sd,
return 0;
}
+static const s64 link_freq_menu_items[] = {
+ 384000000,
+};
+
static int ov5640_set_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_format *format)
@@ -2636,6 +2641,8 @@ static int ov5640_s_ctrl(struct v4l2_ctrl *ctrl)
case V4L2_CID_VFLIP:
ret = ov5640_set_ctrl_vflip(sensor, ctrl->val);
break;
+ case V4L2_CID_LINK_FREQ:
+ return 0;
default:
ret = -EINVAL;
break;
@@ -2703,6 +2710,9 @@ static int ov5640_init_controls(struct ov5640_dev *sensor)
V4L2_CID_POWER_LINE_FREQUENCY_AUTO, 0,
V4L2_CID_POWER_LINE_FREQUENCY_50HZ);
+ ctrls->link_freq = v4l2_ctrl_new_int_menu(hdl, ops, V4L2_CID_LINK_FREQ,
+ 0, 0, link_freq_menu_items);
+
if (hdl->error) {
ret = hdl->error;
goto free_ctrls;
--
2.7.4
