[PATCH v7 15/28] media: ov5640: Add HBLANK control

Sakari Ailus
2022-05-13T14:16:26Z

Add the HBLANK control as read-only.

The hblank value is fixed in the mode definition and is updated
everytime a new format is applied.

Signed-off-by: Jacopo Mondi <jacopo@jmondi.org>
Acked-by: Hugues Fruchet <hugues.fruchet@foss.st.com>
Tested-by: Hugues Fruchet <hugues.fruchet@foss.st.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
---
drivers/media/i2c/ov5640.c | 16 ++++++++++++++++
1 file changed, 16 insertions(+)

diff --git a/drivers/media/i2c/ov5640.c b/drivers/media/i2c/ov5640.c
index c94a04ec679c8..aa93cc980c410 100644
--- a/drivers/media/i2c/ov5640.c
+++ b/drivers/media/i2c/ov5640.c
@@ -309,6 +309,7 @@ struct ov5640_ctrls {
struct v4l2_ctrl_handler handler;
struct v4l2_ctrl *pixel_rate;
struct v4l2_ctrl *link_freq;
+ struct v4l2_ctrl *hblank;
struct {
struct v4l2_ctrl *auto_exp;
struct v4l2_ctrl *exposure;
@@ -2699,6 +2700,8 @@ static int ov5640_update_pixel_rate(struct ov5640_dev *sensor)
const struct ov5640_mode_info *mode = sensor->current_mode;
enum ov5640_pixel_rate_id pixel_rate_id = mode->pixel_rate;
struct v4l2_mbus_framefmt *fmt = &sensor->fmt;
+ const struct ov5640_timings *timings;
+ unsigned int hblank;
unsigned int i = 0;
u32 pixel_rate;
s64 link_freq;
@@ -2756,6 +2759,11 @@ static int ov5640_update_pixel_rate(struct ov5640_dev *sensor)
__v4l2_ctrl_s_ctrl_int64(sensor->ctrls.pixel_rate, pixel_rate);
__v4l2_ctrl_s_ctrl(sensor->ctrls.link_freq, i);

+ timings = ov5640_timings(sensor, mode);
+ hblank = timings->htot - mode->width;
+ __v4l2_ctrl_modify_range(sensor->ctrls.hblank,
+ hblank, hblank, 1, hblank);
+
return 0;
}

@@ -3220,6 +3228,8 @@ static int ov5640_init_controls(struct ov5640_dev *sensor)
const struct v4l2_ctrl_ops *ops = &ov5640_ctrl_ops;
struct ov5640_ctrls *ctrls = &sensor->ctrls;
struct v4l2_ctrl_handler *hdl = &ctrls->handler;
+ const struct ov5640_timings *timings;
+ unsigned int hblank;
int ret;

v4l2_ctrl_handler_init(hdl, 32);
@@ -3239,6 +3249,11 @@ static int ov5640_init_controls(struct ov5640_dev *sensor)
OV5640_DEFAULT_LINK_FREQ,
ov5640_csi2_link_freqs);

+ timings = ov5640_timings(sensor, mode);
+ hblank = timings->htot - mode->width;
+ ctrls->hblank = v4l2_ctrl_new_std(hdl, ops, V4L2_CID_HBLANK, hblank,
+ hblank, 1, hblank);
+
/* Auto/manual white balance */
ctrls->auto_wb = v4l2_ctrl_new_std(hdl, ops,
V4L2_CID_AUTO_WHITE_BALANCE,
@@ -3288,6 +3303,7 @@ static int ov5640_init_controls(struct ov5640_dev *sensor)

ctrls->pixel_rate->flags |= V4L2_CTRL_FLAG_READ_ONLY;
ctrls->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+ ctrls->hblank->flags |= V4L2_CTRL_FLAG_READ_ONLY;
ctrls->gain->flags |= V4L2_CTRL_FLAG_VOLATILE;
ctrls->exposure->flags |= V4L2_CTRL_FLAG_VOLATILE;

--
2.30.2