[PATCH v3 0/3] media: i2c: imx471: Add line length PCK setting and derive pixel rate from PLL configuration

[Kate Hsuan <hpa@redhat.com>]

This patchset adds the line length PCK setting and calculates the pixel
rate based on the external clock rate and PLL configurations.

Changes in v3:
1. The line length PCK is set with the hblank control.
2. Define symbolic names for the PLL registers.
3. Fix the register size for the PLL registers. (0x0300-0x0310)
4. Derive pixel rate from the PLL configuration.

The discussion of pixel rate can be found at the following URL
https://lore.kernel.org/linux-media/CAEth8oHj1Jon9m_4aFzRGoKcdopUMym+MyV0JxTo6F+AUFOLoQ@mail.gmail.com/

Changes in v2:
The patchset contains three patches:
1. Add line length PCK setting
2. Name the PLL registers in the OP domain
3. Calculate pixel rate based on the external clock rate and the PLL
   configurations in the OP domain.

The line length PCK setting is added to the sensor driver to ensure the
pixel rate is correct. The pixel rate is calculated based on the external
clock rate. Moreover, since the sensor runs in the PLL DUAL mode, the
configurations of the OP domain are considered.

Tested with libcamera 0.7.2 and the patchset mitigated the horizontal
line noise.

Changes in v1:
1. Add line length PCK setting

Kate Hsuan (3):
  media: i2c: imx471: Configure line length PCK via hblank control
  media: i2c: imx471: Define symbolic names for PLL registers
  media: i2c: imx471: Derive pixel rate from PLL configuration

 drivers/media/i2c/imx471.c | 70 ++++++++++++++++++++++++--------------
 1 file changed, 45 insertions(+), 25 deletions(-)

-- 
2.55.0