[PATCH v4 0/3] media: i2c: ov9282: Modernize driver with CCI and streams API

[Xiaolei Wang]

This series modernizes the ov9282 driver by:

1. Converting to the common CCI (Camera Control Interface) register
   access helpers, which simplifies the code by removing custom I2C
   register access functions.

2. Switching to use the V4L2 sub-device state lock instead of a
   private mutex, improving integration with the V4L2 framework.

3. Migrating from the legacy s_stream callback to the modern
   enable_streams/disable_streams callbacks, providing better support
   for multiplexed streams.

These changes reduce code complexity, improve maintainability, and
align the driver with current V4L2 best practices.

I verified each patch on the Raspberry Pi 5 platform.

Changes in V4:
  - patch 1: use cci_multi_reg_write() instead of regmap_multi_reg_write()
  - Link to v3: https://patchwork.linuxtv.org/project/linux-media/cover/20260303104942.3111366-1-xiaolei.wang@xxxxxxxxxxxxx/

Changes in V3:
  - Patch 2:
    * Remove unnecessary ret assignment in v4l2_subdev_init_finalize() error path
    * Move pm_runtime_idle() call after v4l2_async_register_subdev_sensor() to avoid
      potential double power-off in error handling path
  - Link to v2: https://patchwork.linuxtv.org/project/linux-media/cover/20260301104809.3505257-1-xiaolei.wang@xxxxxxxxxxxxx/

Changes in V2:
  - Patch 1: Fixed group hold release error handling in
    ov9282_update_exp_gain()
  - Patch 2: Fixed runtime PM cleanup in probe error path
  - Patch 3: Improved error handling with clearer err_pm_put: label
  - Link to V1: https://patchwork.linuxtv.org/project/linux-media/cover/20260228083401.1007434-1-xiaolei.wang@xxxxxxxxxxxxx/


Xiaolei Wang (3):
  media: i2c: ov9282: Convert to CCI register access helpers
  media: i2c: ov9282: Switch to using the sub-device state lock
  media: i2c: ov9282: switch to {enable,disable}_streams

 drivers/media/i2c/Kconfig  |   1 +
 drivers/media/i2c/ov9282.c | 677 +++++++++++++------------------------
 2 files changed, 236 insertions(+), 442 deletions(-)

-- 
2.43.0