diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-6.1/950-0623-media-i2c-imx290-Fix-max-gain-value.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-6.1/950-0623-media-i2c-imx290-Fix-max-gain-value.patch | 52 |
1 files changed, 52 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-6.1/950-0623-media-i2c-imx290-Fix-max-gain-value.patch b/target/linux/bcm27xx/patches-6.1/950-0623-media-i2c-imx290-Fix-max-gain-value.patch new file mode 100644 index 0000000000..2a5200f527 --- /dev/null +++ b/target/linux/bcm27xx/patches-6.1/950-0623-media-i2c-imx290-Fix-max-gain-value.patch @@ -0,0 +1,52 @@ +From cf16974cd2daa3ae3fa3faf7c12c8b2d44828950 Mon Sep 17 00:00:00 2001 +From: Laurent Pinchart <laurent.pinchart@ideasonboard.com> +Date: Sun, 16 Oct 2022 09:15:16 +0300 +Subject: [PATCH] media: i2c: imx290: Fix max gain value + +Upstream commit 6d7a87f2d3a6. + +The gain is expressed in multiple of 0.3dB, as a value between 0.0dB +and 72.0dB. Gains between 0.0dB and 30.0dB (included) apply analog gain +only, higher gains from 30.3dB to 72dB apply additional digital gain. + +The maximum gain value is erroneously set to 72. Increase it to 100 to +cover the whole analog gain range. Support for digital gain can be added +separately if needed. + +The IMX327 and IMX462 are largely compatible with the IMX290, but have +an analog gain range of 0.0dB to 29.4dB and 42dB of digital gain. When +support for those sensors gets added to the driver, the gain control +should be adjusted accordingly. + +Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> +Reviewed-by: Alexander Stein <alexander.stein@ew.tq-group.com> +Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com> +--- + drivers/media/i2c/imx290.c | 15 ++++++++++++++- + 1 file changed, 14 insertions(+), 1 deletion(-) + +--- a/drivers/media/i2c/imx290.c ++++ b/drivers/media/i2c/imx290.c +@@ -1019,8 +1019,21 @@ static int imx290_probe(struct i2c_clien + v4l2_ctrl_handler_init(&imx290->ctrls, 5); + imx290->ctrls.lock = &imx290->lock; + ++ /* ++ * The sensor has an analog gain and a digital gain, both controlled ++ * through a single gain value, expressed in 0.3dB increments. Values ++ * from 0.0dB (0) to 30.0dB (100) apply analog gain only, higher values ++ * up to 72.0dB (240) add further digital gain. Limit the range to ++ * analog gain only, support for digital gain can be added separately ++ * if needed. ++ * ++ * The IMX327 and IMX462 are largely compatible with the IMX290, but ++ * have an analog gain range of 0.0dB to 29.4dB and 42dB of digital ++ * gain. When support for those sensors gets added to the driver, the ++ * gain control should be adjusted accordingly. ++ */ + v4l2_ctrl_new_std(&imx290->ctrls, &imx290_ctrl_ops, +- V4L2_CID_GAIN, 0, 72, 1, 0); ++ V4L2_CID_GAIN, 0, 100, 1, 0); + + v4l2_ctrl_new_std(&imx290->ctrls, &imx290_ctrl_ops, + V4L2_CID_EXPOSURE, 1, IMX290_VMAX_DEFAULT - 2, 1, |