[PATCH 00/18] media: microchip-isc: Color correction and histogram stats

Balamanikandan Gunasundar
2025-10-09T15:54:17Z

Hi,

This patch series has a set of enhancements to the Microchip Image Sensor
Controller driver. The objective is to expand its image processing
capabilities and to improve the colors.

This series also introduces a new stats driver that exposes the histogram
data to userspace via v4l2 controls. This allows applications such as
libcamera to access real time image statistics for advanced image
processing like automatic exposure, white balance adjustments etc.

Balakrishnan Sambath (11):
media: microchip-isc: Enable GDC and CBC module flags for RGB formats
media: microchip-isc: Improve histogram calculation with outlier
rejection
media: microchip-isc: Use channel averages for Grey World AWB
media: microchip-isc: Add range based black level correction
media: platform: microchip: Extend gamma table and control range
media: platform: microchip: Add new histogram submodule
media: microchip-isc: Register and unregister statistics device
media: microchip-isc: Always enable histogram for all RAW formats
media: microchip-isc: fix histogram state initialization order
media: microchip-isc: decouple histogram cycling from AWB mode
media: microchip-isc: enable userspace histogram statistics export

Balamanikandan Gunasundar (7):
media: platform: microchip: set maximum resolution for sam9x7
media: platform: microchip: Include DPC modules flags in pipeline
media: microchip-isc: expose hue and saturation as v4l2 controls
media: microchip-isc: Rename CBC to CBHS
media: microchip-isc: Store histogram data of all channels
media: videodev2.h, v4l2-ioctl: Add microchip statistics format
media: microchip-isc: expose color correction registers as v4l2
controls

drivers/media/platform/microchip/Kconfig | 2 +
drivers/media/platform/microchip/Makefile | 2 +-
.../platform/microchip/microchip-isc-base.c | 373 ++++++++++--
.../platform/microchip/microchip-isc-regs.h | 3 +
.../platform/microchip/microchip-isc-stats.c | 549 ++++++++++++++++++
.../media/platform/microchip/microchip-isc.h | 44 +-
.../microchip/microchip-sama5d2-isc.c | 2 +-
.../microchip/microchip-sama7g5-isc.c | 73 ++-
drivers/media/v4l2-core/v4l2-ioctl.c | 1 +
include/linux/atmel-isc-media.h | 13 +
include/uapi/linux/videodev2.h | 3 +
11 files changed, 1001 insertions(+), 64 deletions(-)
create mode 100644 drivers/media/platform/microchip/microchip-isc-stats.c

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2.34.1