[PATCH v4 0/2] media: ov8856: run full power sequence on ACPI

This series makes the ov8856 driver request its power resources and run
the power on/off sequence on ACPI platforms as well as DT, and fixes an
unrelated debug message.

- Background: power resources on Intel ACPI platforms :
On Intel platforms the sensor is enumerated via ACPI, and an INT3472
"discrete" companion device (the power-logic-control driver under
drivers/platform/x86/intel/int3472) registers the sensor's
reset/powerdown GPIOs and the regulator supply.
These resources are therefore discoverable and usable through the
standard gpiod/regulator lookups at probe time.

- Current symptom :
Previously the driver guarded both the GPIO/regulator acquisition in
ov8856_get_hwcfg() and the whole power on/off sequence with 
is_acpi_node() and skipped them on ACPI. As a result the sensor was
never powered or reset by the driver and probe failed when reading
the chip ID in ov8856_identify_module().
Removing those checks makes the ACPI path behave like DT.

- Validation :
Tested on Intel platforms with kernel 6.17 and 7.0.

Changes in v4:
 [1/2] media: i2c: ov8856 : remove ACPI node bypass mechanism
   - Modified commit log description.
   - Added tags : Reviewed-by
 [2/2] media: i2c: ov8856: fix debug message to report actual CSI-2 lane
count
   - No change

Changes in v3:
 Add cover letter to describe details of patches.
 [1/2] media: i2c: ov8856 : remove ACPI node bypass mechanism
   - Add tags : Fixes and Cc
   - Removed a sentence from commit as this change has already been
     split out and is covered separately in patch 2/2
 [2/2] media: i2c: ov8856: fix debug message to report actual CSI-2 lane
count
   - Added tags : Cc

Changes in v2:
 [1/2] media: i2c: ov8856 : remove ACPI node bypass mechanism
   - No change
 [2/2] media: i2c: ov8856: fix debug message to report actual CSI-2 lane
count
   - Added tags : Fixes and Reviewed-by

Serin Yeh (2):
  media: i2c: ov8856 : remove ACPI node bypass mechanism
  media: i2c: ov8856: fix debug message to report actual CSI-2 lane
    count

 drivers/media/i2c/ov8856.c | 32 ++++++++++++--------------------
 1 file changed, 12 insertions(+), 20 deletions(-)

-- 
2.25.1