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Subject[Patch 1/3] media: ov5640: add PIXEL_RATE control
Date
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..c2a44f30d56e 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;
@@ -241,6 +244,7 @@ struct ov5640_dev {
const struct ov5640_mode_info *last_mode;
enum ov5640_frame_rate current_fr;
struct v4l2_fract frame_interval;
+ u64 pixel_rate;

struct ov5640_ctrls ctrls;

@@ -2202,6 +2206,7 @@ static int ov5640_set_fmt(struct v4l2_subdev *sd,
const struct ov5640_mode_info *new_mode;
struct v4l2_mbus_framefmt *mbus_fmt = &format->format;
struct v4l2_mbus_framefmt *fmt;
+ u64 rate;
int ret;

if (format->pad != 0)
@@ -2233,6 +2238,12 @@ static int ov5640_set_fmt(struct v4l2_subdev *sd,
if (mbus_fmt->code != sensor->fmt.code)
sensor->pending_fmt_change = true;

+ rate = sensor->current_mode->vtot * sensor->current_mode->htot;
+ rate *= ov5640_framerates[sensor->current_fr];
+ sensor->pixel_rate = rate;
+
+ __v4l2_ctrl_s_ctrl_int64(sensor->ctrls.pixel_rate,
+ sensor->pixel_rate);
out:
mutex_unlock(&sensor->lock);
return ret;
@@ -2657,6 +2668,13 @@ 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,
+ 55969920);
+ 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,
@@ -2782,6 +2800,7 @@ static int ov5640_s_frame_interval(struct v4l2_subdev *sd,
struct ov5640_dev *sensor = to_ov5640_dev(sd);
const struct ov5640_mode_info *mode;
int frame_rate, ret = 0;
+ u64 rate;

if (fi->pad != 0)
return -EINVAL;
@@ -2816,6 +2835,12 @@ static int ov5640_s_frame_interval(struct v4l2_subdev *sd,
sensor->frame_interval = fi->interval;
sensor->current_mode = mode;
sensor->pending_mode_change = true;
+
+ rate = sensor->current_mode->vtot * sensor->current_mode->htot;
+ rate *= ov5640_framerates[sensor->current_fr];
+ sensor->pixel_rate = rate;
+ __v4l2_ctrl_s_ctrl_int64(sensor->ctrls.pixel_rate,
+ sensor->pixel_rate);
}
out:
mutex_unlock(&sensor->lock);
--
2.17.1
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