From e15ddc9644a11ab51da709f866a2b939ac383a7a Mon Sep 17 00:00:00 2001 From: Daniel Scally Date: Tue, 23 Nov 2021 01:00:14 +0100 Subject: [PATCH] media: i2c: Switch exposure control unit to lines The ov8865 driver currently has the unit of the V4L2_CID_EXPOSURE control as 1/16th of a line. This is what the sensor expects, but isn't very intuitive. Switch the control to be in units of a line and simply do the 16x multiplication before passing the value to the sensor. The datasheet for this sensor gives minimum exposure as 2 lines, so take the opportunity to correct the lower bounds of the control. Signed-off-by: Daniel Scally Signed-off-by: Sakari Ailus Signed-off-by: Mauro Carvalho Chehab --- drivers/media/i2c/ov8865.c | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/drivers/media/i2c/ov8865.c b/drivers/media/i2c/ov8865.c index 45b569f1e7c0..1cc9f78bb97a 100644 --- a/drivers/media/i2c/ov8865.c +++ b/drivers/media/i2c/ov8865.c @@ -2126,6 +2126,9 @@ static int ov8865_exposure_configure(struct ov8865_sensor *sensor, u32 exposure) { int ret; + /* The sensor stores exposure in units of 1/16th of a line */ + exposure *= 16; + ret = ov8865_write(sensor, OV8865_EXPOSURE_CTRL_HH_REG, OV8865_EXPOSURE_CTRL_HH(exposure)); if (ret) @@ -2527,8 +2530,8 @@ static int ov8865_ctrls_init(struct ov8865_sensor *sensor) /* Exposure */ - ctrls->exposure = v4l2_ctrl_new_std(handler, ops, V4L2_CID_EXPOSURE, 16, - 1048575, 16, 512); + ctrls->exposure = v4l2_ctrl_new_std(handler, ops, V4L2_CID_EXPOSURE, 2, + 65535, 1, 32); /* Gain */