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).
Based on v6.19-rc8 (18f7fcd5e69a).
v1: https://lore.kernel.org/linux-media/20251009155251.102472-1-balamanikandan.gunasundar@microchip.com/
v3:
- Fix bisect failures in patches 9-11 (regmap declaration, gamma LUT
macro ordering)
- Fix Fixes: tag in patch 2 (use mainline commit, not staging)
- Add Co-developed-by for patches co-authored with Balamanikandan Gunasundar
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 | 728 ++++++++++++++++--
.../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, 894 insertions(+), 108 deletions(-)
create mode 100644 Documentation/userspace-api/media/drivers/microchip-isc.rst
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2.34.1