mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-20 14:13:16 +00:00
20ea6adbf1
Build system: x86_64 Build-tested: bcm2708, bcm2709, bcm2710, bcm2711 Run-tested: bcm2708/RPiB+, bcm2709/RPi3B, bcm2710/RPi3B, bcm2711/RPi4B Signed-off-by: Marty Jones <mj8263788@gmail.com> Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
94 lines
2.8 KiB
Diff
94 lines
2.8 KiB
Diff
From e14032e74f63afc123d631d4475b057221b2de60 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;
|
|
@@ -1178,6 +1206,13 @@ 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,
|