[PATCH v3 0/2] media: i2c: Add imx283 camera sensor driver

Umang Jain
2024-03-13T07:08:01Z

Add a v4l2 subdevice driver for the Sony IMX283 image sensor.

The IMX283 is a 20MP Diagonal 15.86 mm (Type 1) CMOS Image Sensor with
Square Pixel for Color Cameras.

The following features are supported:
- Manual exposure an gain control support
- vblank/hblank/link freq control support
- Test pattern support control
- Arbitrary horizontal and vertical cropping
- Supported resolution:
- 5472x3648 @ 20fps (SRGGB12)
- 5472x3648 @ 25fps (SRGGB10)
- 2736x1824 @ 50fps (SRGGB12)

The driver is tested on mainline branch v6.8-rc2 on IMX8MP Debix-SOM-A.
Additional testing has been done on RPi5 with the downstream BSP.

Changes in v3:
- fix headers includes
- Improve #define(s) readability
- Drop __func__ from error logs
- Use HZ_PER_MHZ instead of MEGA
- mdsel* variables should be u8
- Use container_of_const() instead of container_of()
- Use clamp() used of clamp_t variant
- Use streams API imx283_{enable|disable}_streams (**NOTE**)
- Properly fix PM runtime handling
(pm_ptr(), DEFINE_RUNTIME_DEV_PM_OPS,
imx283_runtime_suspend, imx283_runtime_resume)
- Fix format modifiers, signed-ness at various places

**NOTE**
There is streams mask issue, as no routes are defined with 1 pad:
For testing, I have the following applied locally:
```
diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c
index 4c6198c48dd6..38545d779620 100644
--- a/drivers/media/v4l2-core/v4l2-subdev.c
+++ b/drivers/media/v4l2-core/v4l2-subdev.c
@@ -2115,8 +2115,10 @@ int v4l2_subdev_enable_streams(struct v4l2_subdev *sd, u32 pad,
if (pad >= sd->entity.num_pads)
return -EINVAL;

- if (!streams_mask)
- return 0;
+ if (!streams_mask) {
+ dev_err(sd->dev, "no streams mask, returning ....\n");
+ //return 0;
+ }

/* Fallback on .s_stream() if .enable_streams() isn't available. */
if (!sd->ops->pad || !sd->ops->pad->enable_streams)
```

changes in v2 (summary):
- Use u32 wherever possible
- Use MEGA macro instead of self defined MHZ() macro
- Properly refine regs using CCI
- Drop tracking of current mode. Shifted to infer from active state directly.
(Laurent's review)
- Cont. from above: Pass the struct imx283_mode to functions whereever required.
- Remove unused comments
- Remove custom mutex. Use control handler one instead.
- Drop imx283_reset_colorspace() and inline
- Set colorspace field properly (drop _DEFAULTS)
- Use __maybe_unused for imx283_power_on() and imx283_power_off()
- Store controls v4l2_ctrl handles for those required, not all.
- Drop imx283_free_controls(). Use v4l2_ctrl_handler_free
- fix reset-gpios handling and add it to DT schema
- fix data-lanes property in DT schema
- fix IMX283 Kconfig
- Remove unused macros
- Alphabetical case consistency

Kieran Bingham (1):
media: i2c: Add imx283 camera sensor driver

Umang Jain (1):
media: dt-bindings: media: Add bindings for IMX283

.../bindings/media/i2c/sony,imx283.yaml | 107 ++
MAINTAINERS | 9 +
drivers/media/i2c/Kconfig | 10 +
drivers/media/i2c/Makefile | 1 +
drivers/media/i2c/imx283.c | 1596 +++++++++++++++++
5 files changed, 1723 insertions(+)
create mode 100644 Documentation/devicetree/bindings/media/i2c/sony,imx283.yaml
create mode 100644 drivers/media/i2c/imx283.c

--
2.43.0