Current v4l2 focus ctrl step value of 16, limits
the minimum granularity of focus positions to 16.
Setting this value as 1, enables more accurate
focus positions.
Signed-off-by: Rajmohan Mani <rajmohan.m...@intel.com>
---
drivers/media/i2c/dw9714.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/media/i2c/dw9714.c b/drivers/media/i2c/dw9714.c
index 6a607d7..f9212a8 100644
--- a/drivers/media/i2c/dw9714.c
+++ b/drivers/media/i2c/dw9714.c
@@ -22,6 +22,11 @@
#define DW9714_NAME "dw9714"
#define DW9714_MAX_FOCUS_POS 1023
/*
+ * This sets the minimum granularity for the focus positions.
+ * A value of 1 gives maximum accuracy for a desired focus position
+ */
+#define DW9714_FOCUS_STEPS 1
+/*
* This acts as the minimum granularity of lens movement.
* Keep this value power of 2, so the control steps can be
* uniformly adjusted for gradual lens movement, with desired
@@ -138,7 +143,7 @@ static int dw9714_init_controls(struct dw9714_device
*dev_vcm)
v4l2_ctrl_handler_init(hdl, 1);
v4l2_ctrl_new_std(hdl, ops, V4L2_CID_FOCUS_ABSOLUTE,
- 0, DW9714_MAX_FOCUS_POS, DW9714_CTRL_STEPS, 0);
+ 0, DW9714_MAX_FOCUS_POS, DW9714_FOCUS_STEPS, 0);
if (hdl->error)
dev_err(&client->dev, "%s fail error: 0x%x\n",
--
1.9.1
