[PATCH v2 00/15] media: microchip-isc: fixes and enhancements

[Balakrishnan Sambath]

Bug fixes and feature additions for the Microchip ISC/XISC driver.

Fixes:
 - SBGGR10 Bayer pattern was mapped incorrectly (red/blue swap)
 - WB register fields corrupted by sign extension
 - Race between histogram IRQ and stream stop
 - PM runtime reference leak in AWB work handler

Features:
 - Driver documentation
 - Gamma 1.8/2.4 curves, per-channel gamma LUT
 - Hue/saturation controls for SAMA7G5
 - Color correction matrix controls
 - Grey World AWB with EMA smoothing

Split from v1 per review. Histogram stats follow as Series 2.

Tested on SAMA7G5-EK with IMX219 (RAW10 Bayer capture, AWB, color
controls verified). Build tested with COMPILE_TEST and W=1. All
patches pass checkpatch --strict.

Based on v6.19-rc8 (18f7fcd5e69a).

v1: https://lore.kernel.org/linux-media/20251009155251.102472-1-balamanikandan.gunasundar@xxxxxxxxxxxxx/

v2:
 - Split series (histogram stats moved to Series 2)
 - Bug fixes first, then features
 - New fixes and features as listed above
 - Commit message cleanups
 - Rebased on v6.19-rc8

Balakrishnan Sambath (15):
  media: microchip-isc: fix SBGGR10 Bayer pattern
  media: microchip-isc: mask WB offset and gain register fields
  media: microchip-isc: fix race condition on stream stop
  media: microchip-isc: fix PM runtime leak in AWB work handler
  media: microchip-isc: add driver documentation
  media: microchip-isc: set SAM9X7 maximum resolution to 2560x1920
  media: microchip-isc: configure DPC and pipeline for SAMA7G5
  media: microchip-isc: add gamma 1.8 and 2.4 correction curves
  media: microchip-isc: add SAMA7G5 hue and saturation controls
  media: microchip-isc: expose color correction matrix as V4L2 controls
  media: microchip-isc: add per-channel gamma LUT controls
  media: microchip-isc: reset pipeline state on kernel AWB enable
  media: microchip-isc: use weighted averages for Grey World AWB
  media: microchip-isc: smooth AWB gains with EMA filter
  media: microchip-isc: scale DPC black level to sensor bit depth

 .../userspace-api/media/drivers/index.rst     |   1 +
 .../media/drivers/microchip-isc.rst           |  71 ++
 MAINTAINERS                                   |   1 +
 .../platform/microchip/microchip-isc-base.c   | 730 ++++++++++++++++--
 .../platform/microchip/microchip-isc-regs.h   |  11 +-
 .../media/platform/microchip/microchip-isc.h  |  56 +-
 .../microchip/microchip-sama5d2-isc.c         |   2 +-
 .../microchip/microchip-sama7g5-isc.c         | 101 ++-
 include/linux/atmel-isc-media.h               |  31 +
 9 files changed, 896 insertions(+), 108 deletions(-)
 create mode 100644 Documentation/userspace-api/media/drivers/microchip-isc.rst

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2.34.1