[Patch v2 1/3] media: ov5640: add PIXEL_RATE control

Benoit Parrot
2019-10-02T13:49:37Z

Add v4l2 controls to report the pixel rates of each mode. This is
needed by some CSI2 receiver in order to perform proper DPHY
configuration.

Signed-off-by: Benoit Parrot <bparrot@ti.com>
---
drivers/media/i2c/ov5640.c | 25 +++++++++++++++++++++++++
1 file changed, 25 insertions(+)

diff --git a/drivers/media/i2c/ov5640.c b/drivers/media/i2c/ov5640.c
index 500d9bbff10b..5198dc887400 100644
--- a/drivers/media/i2c/ov5640.c
+++ b/drivers/media/i2c/ov5640.c
@@ -193,6 +193,9 @@ struct ov5640_mode_info {

struct ov5640_ctrls {
struct v4l2_ctrl_handler handler;
+ struct {
+ struct v4l2_ctrl *pixel_rate;
+ };
struct {
struct v4l2_ctrl *auto_exp;
struct v4l2_ctrl *exposure;
@@ -2194,6 +2197,16 @@ static int ov5640_try_fmt_internal(struct v4l2_subdev *sd,
return 0;
}

+static u64 ov5640_calc_pixel_rate(struct ov5640_dev *sensor)
+{
+ u64 rate;
+
+ rate = sensor->current_mode->vtot * sensor->current_mode->htot;
+ rate *= ov5640_framerates[sensor->current_fr];
+
+ return rate;
+}
+
static int ov5640_set_fmt(struct v4l2_subdev *sd,
struct v4l2_subdev_pad_config *cfg,
struct v4l2_subdev_format *format)
@@ -2233,6 +2246,8 @@ static int ov5640_set_fmt(struct v4l2_subdev *sd,
if (mbus_fmt->code != sensor->fmt.code)
sensor->pending_fmt_change = true;

+ __v4l2_ctrl_s_ctrl_int64(sensor->ctrls.pixel_rate,
+ ov5640_calc_pixel_rate(sensor));
out:
mutex_unlock(&sensor->lock);
return ret;
@@ -2657,6 +2672,13 @@ static int ov5640_init_controls(struct ov5640_dev *sensor)
/* we can use our own mutex for the ctrl lock */
hdl->lock = &sensor->lock;

+ /* Clock related controls */
+ ctrls->pixel_rate =
+ v4l2_ctrl_new_std(hdl, ops,
+ V4L2_CID_PIXEL_RATE, 0, INT_MAX, 1,
+ ov5640_calc_pixel_rate(sensor));
+ ctrls->pixel_rate->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+
/* Auto/manual white balance */
ctrls->auto_wb = v4l2_ctrl_new_std(hdl, ops,
V4L2_CID_AUTO_WHITE_BALANCE,
@@ -2816,6 +2838,9 @@ static int ov5640_s_frame_interval(struct v4l2_subdev *sd,
sensor->frame_interval = fi->interval;
sensor->current_mode = mode;
sensor->pending_mode_change = true;
+
+ __v4l2_ctrl_s_ctrl_int64(sensor->ctrls.pixel_rate,
+ ov5640_calc_pixel_rate(sensor));
}
out:
mutex_unlock(&sensor->lock);
--
2.17.1