[PATCH v6 0/4] Add Sony IMX471 camera sensor driver

[Kate Hsuan]

This patchset adds the Sony IMX471 camera sensor driver to the Linux
kernel and resolves the IPU7 camera can't work issueon Lenovo X9
laptops [1].

The patchset contains two patches:
1. Add DMI information of Lenovo X9 to the image upside-down list
2. Add Sony IMX471 image sensor driver

The IMX471 driver can be found in the Intel ipu6-drivers repository [2].
To comply with the sensor driver implementation, the clean-up work
includes:

1. Use CCI register helpers.

2. Enable and disable streams using enable_streams and disable_streams
   functions in struct v4l2_subdev_pad_ops. Invoke
   v4l2_subdev_s_stream_helper() to manage the streaming state.

3. Get rotation information from fwnode properties using
   v4l2_fwnode_device_parse().

4. Finalizes the initialization of the subdev, including allocation of
   the active state using v4l2_subdev_init_finalize().

5. Add the IMX471 driver to the Makefile and Kconfig file.

6. The mutex lock is managed by the V4l2 core.

7. Replace the supported link frequency with v4l2_link_freq_to_bitmap().

8. Drop unused codes.

[1] https://bugzilla.redhat.com/show_bug.cgi?id=2454119
[2] https://github.com/intel/ipu6-drivers/commits/master/drivers/media/i2c/imx471.c

Changes in v6:
1. Add the con_id "vana" for the power enable to the int3472_gpio_map table.
2. Drop unnecessary macros.
3. Name the registers.

Changes in v5:
1. Add a description for the DMI_BOARD_NAME in the ipu-bridge driver.
2. Check the numbers of MIPI lanes. The driver only support 4 lanes mode.
3. Fix many rumetime PM issues.
4. Drop pixel_rate control variable.
5. Drop unnecessary comments.
6. Name the registers.
7. Fix a leak in imx471_init_controls().

Changes in v4:
1. Add TBE20A0 (found on Lenovo X1 Carbon G14) to the supported sensors list.
2. Revert the sensor upside-down list to v1.
3. Decrease the max analog gain to 800 to mitigate the image flickering problem.
4. Return the error value when __v4l2_ctrl_modify_range() fails.
5. Fix indentation issue in Kconfig.
6. Fix the cci error value issue.
7. Drop unnecessary comments.
8. Drop unused link_freq control variable.

Changes in v3:
1. Naming the register addresses and set up the value with the correct value length.
2. Implement the .get_selection().
3. Drop "identified" field from struct imx471.
4. Drop "streaming" field from struct imx471 and use the __v4l2_ctrl_grab() instead.
5. Moreover, The naming for the register can be found in a seperated patch. If we
   agree with the patch, I will squash it into one patch.

Changes in v2:
1. Change the Bayer format setting according to the vertical and horizontal flip settings.
2. Replace the self-owned mutex with the v4l2 subdev state.
3. Rework the flip control.
4. Manage the regulators using devm_regulator_bulk_get|disable|enbale API
5. Invoke devm_v4l2_sensor_clk_get to get clock-frequency

Kate Hsuan (4):
  media: ipu-bridge: Add DMI information of Lenovo X9 to the image
    upside-down list
  media: ipu-bridge: Add Sony IMX471 for Lenovo X1 Carbon G14
  platform: int3472: discrete: con_id vana for Sony IMX471 as power
    enable
  media: i2c: imx471: Add Sony IMX471 image sensor driver

 MAINTAINERS                                   |   6 +
 drivers/media/i2c/Kconfig                     |  10 +
 drivers/media/i2c/Makefile                    |   1 +
 drivers/media/i2c/imx471.c                    | 957 ++++++++++++++++++
 drivers/media/pci/intel/ipu-bridge.c          |  41 +
 drivers/platform/x86/intel/int3472/discrete.c |  18 +
 6 files changed, 1033 insertions(+)
 create mode 100644 drivers/media/i2c/imx471.c

-- 
2.54.0