[0/3] ipa: simple: Add sensor-specific image and exposure tuning
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Message ID 20260816204259.2845517-1-opensource@inspiredexperts.com
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  • ipa: simple: Add sensor-specific image and exposure tuning
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James Alexander Aug. 16, 2026, 8:42 p.m. UTC 
This series lets a simple IPA tuning file set its starting image controls and
practical AGC limits, then uses those settings for the OV08X40.

The new tuning keys are optional. Existing tuning files keep their current
defaults, and configured values are clamped to the existing control ranges or
the limits reported by the sensor.

The series was built against libcamera b8910c9a4961 with the simple pipeline
and simple IPA enabled. On an HP Spectre x360 14-eu0xxx, the full camera patch
set captured 60 consecutive 3848x2416 frames at 30 fps and produced a stable
preview through PipeWire and GNOME Snapshot.

The OV08X40 matrix and defaults were adjusted under 2700 K LED lighting. They
are a useful starting point for this camera, but they are not lab calibrated.

James Alexander

---
James Alexander (3):
  ipa: simple: adjust: Read defaults from tuning
  ipa: simple: agc: Read limits from tuning
  ipa: simple: Add OV08X40 tuning

 src/ipa/simple/algorithms/adjust.cpp | 26 ++++++++++++++++++++------
 src/ipa/simple/algorithms/adjust.h   |  6 ++++++
 src/ipa/simple/algorithms/agc.cpp    | 44 ++++++++++++++++++++++++++++++++++++-
 src/ipa/simple/algorithms/agc.h      |  9 ++++++++
 src/ipa/simple/data/meson.build      |  1 +
 src/ipa/simple/data/ov08x40.yaml     | 22 +++++++++++++++++++
 6 files changed, 101 insertions(+), 7 deletions(-)