[PATCH v4 0/9] rkisp1: Support BLS on i.MX8MP

[Laurent Pinchart]

Hello,

This patch series adds support for black level subtraction to the
rkisp1 on i.MX8MP. While the rkisp1 IPA already supports black level
subtraction, the i.MX8MP lacks the BLS block in the ISP and instead
implements black level substraction in a new block named companding.
Support for this block has been submitted for the kernel driver in [1]
and [2], which have been merged in the stage tree master branch.

The first part of this series adds support in the rkisp1 pipeline
handler and IPA module for the new ISP extensible parameters format
introduced in [1]. The first patch starts by updating the kernel headers
to the new API. The next two patches then prepare the rkisp1 IPA module
interface to pass the parameters buffer format from the pipeline handler
to the IPA module (2/9), and the size of the filled buffer from the IPA
module to the pipeline handler (3/9). With that in place, patch 4/9 adds
classes that abstract the ISP parameters buffer in order to support the
legacy fixed format and the new extensible format transparently for the
IPA module's algorithms, and patch 5/9 makes use of those classes
through the IPA module. Patch 6/9 finishes the first part by switching
to the extensible format by default when available.

The second part of the series then implements support for BLS on the
i.MX8MP. Patch 7/9 updates the rkisp1 parameters helper classes with
support for the companding block.  Patch 8/9 adds a flag to the IPA
context to signal support for the companding block, and patch 9/9 makes
use of it in the black level correction algorithm to select between the
BLS and companding blocks depending on the platform.

Compared to previous versions, the main changes are the update to the
API that has been merged upstream, and tested support for backward
compatibility with older kernels. Please see individual change logs for
details.

[1] https://lore.kernel.org/r/20240703161048.247124-1-jacopo.mondi@ideasonboard.com
[2] https://lore.kernel.org/r/20240704154932.6686-1-laurent.pinchart@ideasonboard.com

Jacopo Mondi (3):
  include: linux: Update headers for rkisp1 extensible parameters
  ipa: rkisp1: Pass parameters buffer size to pipeline handler
  pipeline: rkisp1: Use the extensible parameters format

Laurent Pinchart (4):
  ipa: rkisp1: Pass parameters buffer format to IPA module
  ipa: rkisp1: Add ISP parameters abstraction class
  ipa: rkisp1: Use the new ISP parameters abstraction
  ipa: rkisp1: params: Add companding blocks

Paul Elder (2):
  ipa: rkisp1: Add compand feature flag to ipa context
  ipa: rkisp1: blc: Add support for BLS in compand

 include/libcamera/ipa/rkisp1.mojom       |   3 +-
 include/linux/README                     |   2 +-
 include/linux/dma-heap.h                 |   2 +-
 include/linux/drm_fourcc.h               |  18 +
 include/linux/rkisp1-config.h            | 578 +++++++++++++++++++++++
 include/linux/v4l2-controls.h            |   2 +
 include/linux/videodev2.h                |   5 +-
 src/ipa/rkisp1/algorithms/agc.cpp        |  48 +-
 src/ipa/rkisp1/algorithms/agc.h          |   2 +-
 src/ipa/rkisp1/algorithms/awb.cpp        |  62 +--
 src/ipa/rkisp1/algorithms/awb.h          |   2 +-
 src/ipa/rkisp1/algorithms/blc.cpp        |  60 ++-
 src/ipa/rkisp1/algorithms/blc.h          |   8 +-
 src/ipa/rkisp1/algorithms/ccm.cpp        |  15 +-
 src/ipa/rkisp1/algorithms/ccm.h          |   4 +-
 src/ipa/rkisp1/algorithms/cproc.cpp      |  14 +-
 src/ipa/rkisp1/algorithms/cproc.h        |   2 +-
 src/ipa/rkisp1/algorithms/dpcc.cpp       |  10 +-
 src/ipa/rkisp1/algorithms/dpcc.h         |   2 +-
 src/ipa/rkisp1/algorithms/dpf.cpp        |  27 +-
 src/ipa/rkisp1/algorithms/dpf.h          |   2 +-
 src/ipa/rkisp1/algorithms/filter.cpp     |  52 +-
 src/ipa/rkisp1/algorithms/filter.h       |   2 +-
 src/ipa/rkisp1/algorithms/goc.cpp        |  17 +-
 src/ipa/rkisp1/algorithms/goc.h          |   2 +-
 src/ipa/rkisp1/algorithms/gsl.cpp        |  20 +-
 src/ipa/rkisp1/algorithms/gsl.h          |   2 +-
 src/ipa/rkisp1/algorithms/lsc.cpp        |  29 +-
 src/ipa/rkisp1/algorithms/lsc.h          |   4 +-
 src/ipa/rkisp1/ipa_context.cpp           |   5 +
 src/ipa/rkisp1/ipa_context.h             |   2 +
 src/ipa/rkisp1/meson.build               |   1 +
 src/ipa/rkisp1/module.h                  |   3 +-
 src/ipa/rkisp1/params.cpp                | 222 +++++++++
 src/ipa/rkisp1/params.h                  | 163 +++++++
 src/ipa/rkisp1/rkisp1.cpp                |  29 +-
 src/libcamera/pipeline/rkisp1/rkisp1.cpp |  10 +-
 37 files changed, 1221 insertions(+), 210 deletions(-)
 create mode 100644 src/ipa/rkisp1/params.cpp
 create mode 100644 src/ipa/rkisp1/params.h


base-commit: 874b63d5cb3f772d361ce891721e7580b09dd378
-- 
Regards,

Laurent Pinchart