diff options
Diffstat (limited to 'target/linux/bcm27xx/patches-5.4/950-0831-media-i2c-imx290-Add-exposure-control-to-the-driver.patch')
| -rw-r--r-- | target/linux/bcm27xx/patches-5.4/950-0831-media-i2c-imx290-Add-exposure-control-to-the-driver.patch | 93 |
1 files changed, 93 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0831-media-i2c-imx290-Add-exposure-control-to-the-driver.patch b/target/linux/bcm27xx/patches-5.4/950-0831-media-i2c-imx290-Add-exposure-control-to-the-driver.patch new file mode 100644 index 0000000000..86836dc3af --- /dev/null +++ b/target/linux/bcm27xx/patches-5.4/950-0831-media-i2c-imx290-Add-exposure-control-to-the-driver.patch @@ -0,0 +1,93 @@ +From d6c85afca764dc32c3d7981867471fc820e07388 Mon Sep 17 00:00:00 2001 +From: Dave Stevenson <dave.stevenson@raspberrypi.com> +Date: Thu, 11 Jun 2020 18:19:13 +0100 +Subject: [PATCH] media: i2c: imx290: Add exposure control to the + driver. + +Adds support for V4L2_CID_EXPOSURE so that userspace can control +the sensor exposure time. + +Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com> +--- + drivers/media/i2c/imx290.c | 35 +++++++++++++++++++++++++++++++++++ + 1 file changed, 35 insertions(+) + +--- a/drivers/media/i2c/imx290.c ++++ b/drivers/media/i2c/imx290.c +@@ -45,6 +45,10 @@ enum imx290_clk_index { + #define IMX290_HMAX_MIN_2LANE 4400 /* Min of 4400 pixels = 30fps */ + #define IMX290_HMAX_MIN_4LANE 2200 /* Min of 2200 pixels = 60fps */ + #define IMX290_HMAX_MAX 0xffff ++ ++#define IMX290_EXPOSURE_MIN 2 ++#define IMX290_EXPOSURE_STEP 1 ++#define IMX290_EXPOSURE_LOW 0x3020 + #define IMX290_PGCTRL 0x308c + #define IMX290_PHY_LANE_NUM 0x3407 + #define IMX290_CSI_LANE_MODE 0x3443 +@@ -103,6 +107,7 @@ struct imx290 { + struct v4l2_ctrl *pixel_rate; + struct v4l2_ctrl *hblank; + struct v4l2_ctrl *vblank; ++ struct v4l2_ctrl *exposure; + + struct mutex lock; + }; +@@ -529,6 +534,20 @@ static int imx290_set_gain(struct imx290 + return ret; + } + ++static int imx290_set_exposure(struct imx290 *imx290, u32 value) ++{ ++ u32 exposure = (imx290->current_mode->height + imx290->vblank->val) - ++ value; ++ int ret; ++ ++ ret = imx290_write_buffered_reg(imx290, IMX290_EXPOSURE_LOW, 3, ++ exposure); ++ if (ret) ++ dev_err(imx290->dev, "Unable to write exposure\n"); ++ ++ return ret; ++} ++ + static int imx290_set_hmax(struct imx290 *imx290, u32 val) + { + u32 hmax = val + imx290->current_mode->width; +@@ -590,6 +609,9 @@ static int imx290_set_ctrl(struct v4l2_c + case V4L2_CID_GAIN: + ret = imx290_set_gain(imx290, ctrl->val); + break; ++ case V4L2_CID_EXPOSURE: ++ ret = imx290_set_exposure(imx290, ctrl->val); ++ break; + case V4L2_CID_HBLANK: + ret = imx290_set_hmax(imx290, ctrl->val); + break; +@@ -764,6 +786,12 @@ static int imx290_set_fmt(struct v4l2_su + IMX290_VMAX_MAX - mode->height, + 1, + mode->vmax - mode->height); ++ if (imx290->exposure) ++ __v4l2_ctrl_modify_range(imx290->exposure, ++ mode->vmax - mode->height, ++ mode->vmax - 4, ++ IMX290_EXPOSURE_STEP, ++ mode->vmax - 4); + } + + *format = fmt->format; +@@ -1182,6 +1210,13 @@ static int imx290_probe(struct i2c_clien + IMX290_VMAX_MAX - mode->height, 1, + mode->vmax - mode->height); + ++ imx290->exposure = v4l2_ctrl_new_std(&imx290->ctrls, &imx290_ctrl_ops, ++ V4L2_CID_EXPOSURE, ++ IMX290_EXPOSURE_MIN, ++ mode->vmax - 4, ++ IMX290_EXPOSURE_STEP, ++ mode->vmax - 4); ++ + imx290->link_freq = + v4l2_ctrl_new_int_menu(&imx290->ctrls, &imx290_ctrl_ops, + V4L2_CID_LINK_FREQ, |