[v2,00/10] media: ar0521: Add analog gain, rework clock tree

Message

Jacopo Mondi Oct. 22, 2022, 9:20 a.m. UTC

Hello,
  this series adds a few features to the ar0521 driver to enable its usage
with libcamera.

In particular:
- enum_frame_sizes
- global analog gain control
- LINK_FREQ
- Rework blanking handligs

v2:

- I have dropped the most controverse part that allows to change the link
  frequency to obtain 60FPS. It can be eventually be applied on top.
- Use register 0x3028 to control analog gain not to overwrite the global digital
  gain.
- Fix the HBLANK/VBLANK max by using the values read from on-chip registers.
- Fix handling of LINK_FREQ in s_cltr (but do not make the control read only).
- Fix errors reported by 0-days:
  - use do_div() for 64-bit division
  - declare variables in function scope and not in case scope in s_ctrl

Thanks
   j

Jacopo Mondi (10):
  media: ar0521: Implement enum_frame_sizes
  media: ar0521: Add V4L2_CID_ANALOG_GAIN
  media: ar0521: Set maximum resolution to 2592x1944
  media: ar0521: Rework PLL computation
  media: ar0521: Refuse unsupported controls
  media: ar0521: Add LINK_FREQ control
  media: ar0521: Adjust exposure and blankings limits
  media: ar0521: Setup controls at s_stream time
  media: ar0521: Rework startup sequence
  media: ar0521: Tab-align definitions

 drivers/media/i2c/ar0521.c | 348 ++++++++++++++++++++++++++-----------
 1 file changed, 245 insertions(+), 103 deletions(-)

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2.37.3