[PATCH 07/13] media: i2c: Add vblank control to ov8865

Daniel Scally
2021-07-22T20:34:56Z

Add a V4L2_CID_VBLANK control to the ov8865 driver.

Signed-off-by: Daniel Scally <djrscally@gmail.com>
---
drivers/media/i2c/ov8865.c | 34 ++++++++++++++++++++++++++++++++++
1 file changed, 34 insertions(+)

diff --git a/drivers/media/i2c/ov8865.c b/drivers/media/i2c/ov8865.c
index 09558a3342dd..daead1fc9314 100644
--- a/drivers/media/i2c/ov8865.c
+++ b/drivers/media/i2c/ov8865.c
@@ -183,6 +183,8 @@
#define OV8865_VTS_H(v) (((v) & GENMASK(11, 8)) >> 8)
#define OV8865_VTS_L_REG 0x380f
#define OV8865_VTS_L(v) ((v) & GENMASK(7, 0))
+#define OV8865_TIMING_MAX_VTS 0xffff
+#define OV8865_TIMING_MIN_VTS 0x04
#define OV8865_OFFSET_X_H_REG 0x3810
#define OV8865_OFFSET_X_H(v) (((v) & GENMASK(15, 8)) >> 8)
#define OV8865_OFFSET_X_L_REG 0x3811
@@ -658,6 +660,7 @@ struct ov8865_state {
struct ov8865_ctrls {
struct v4l2_ctrl *link_freq;
struct v4l2_ctrl *pixel_rate;
+ struct v4l2_ctrl *vblank;

struct v4l2_ctrl_handler handler;
};
@@ -2212,6 +2215,20 @@ static int ov8865_test_pattern_configure(struct ov8865_sensor *sensor,
ov8865_test_pattern_bits[index]);
}

+/* Blanking */
+
+static int ov8865_vts_configure(struct ov8865_sensor *sensor, u32 vblank)
+{
+ u16 vts = sensor->state.mode->output_size_y + vblank;
+ int ret;
+
+ ret = ov8865_write(sensor, OV8865_VTS_H_REG, OV8865_VTS_H(vts));
+ if (ret)
+ return ret;
+
+ return ov8865_write(sensor, OV8865_VTS_L_REG, OV8865_VTS_L(vts));
+}
+
/* State */

static int ov8865_state_mipi_configure(struct ov8865_sensor *sensor,
@@ -2463,6 +2480,8 @@ static int ov8865_s_ctrl(struct v4l2_ctrl *ctrl)
case V4L2_CID_TEST_PATTERN:
index = (unsigned int)ctrl->val;
return ov8865_test_pattern_configure(sensor, index);
+ case V4L2_CID_VBLANK:
+ return ov8865_vts_configure(sensor, ctrl->val);
default:
return -EINVAL;
}
@@ -2479,6 +2498,8 @@ static int ov8865_ctrls_init(struct ov8865_sensor *sensor)
struct ov8865_ctrls *ctrls = &sensor->ctrls;
struct v4l2_ctrl_handler *handler = &ctrls->handler;
const struct v4l2_ctrl_ops *ops = &ov8865_ctrl_ops;
+ const struct ov8865_mode *mode = sensor->state.mode;
+ unsigned int vblank_max, vblank_def;
int ret;

v4l2_ctrl_handler_init(handler, 32);
@@ -2514,6 +2535,13 @@ static int ov8865_ctrls_init(struct ov8865_sensor *sensor)
ARRAY_SIZE(ov8865_test_pattern_menu) - 1,
0, 0, ov8865_test_pattern_menu);

+ /* Blanking */
+ vblank_max = OV8865_TIMING_MAX_VTS - mode->output_size_y;
+ vblank_def = mode->vts - mode->output_size_y;
+ ctrls->vblank = v4l2_ctrl_new_std(handler, ops, V4L2_CID_VBLANK,
+ OV8865_TIMING_MIN_VTS, vblank_max, 1,
+ vblank_def);
+
/* MIPI CSI-2 */

ctrls->link_freq =
@@ -2694,6 +2722,10 @@ static int ov8865_set_fmt(struct v4l2_subdev *subdev,
sensor->state.mbus_code != mbus_code)
ret = ov8865_state_configure(sensor, mode, mbus_code);

+ __v4l2_ctrl_modify_range(sensor->ctrls.vblank, OV8865_TIMING_MIN_VTS,
+ OV8865_TIMING_MAX_VTS - mode->output_size_y,
+ 1, mode->vts - mode->output_size_y);
+
complete:
mutex_unlock(&sensor->mutex);

@@ -3019,6 +3051,8 @@ static int ov8865_probe(struct i2c_client *client)

/* Sensor */

+ sensor->state.mode = &ov8865_modes[0];
+
ret = ov8865_ctrls_init(sensor);
if (ret)
goto error_mutex;
--
2.25.1