[PATCH 00/10] media: Add support for Raspberry Pi 4 ISP

[Stefan Wahren]

Hi Jai,

Am 13.01.26 um 10:05 schrieb Jai Luthra:
> Hi,
>
> This series adds support for the ISP used in Raspberry Pi 4 (and earlier
> variants) by adding the bcm2835-isp V4L2 driver.
could you please point me to the upstream patch, which enables VCHIQ 
support for Raspberry Pi 4?

AFAIR only Raspberry Pi 0 - 3 were officially supported.

Best regards
>
> The underlying hardware for the ISP is accessed through the VideoCore
> VPU, via the VCHIQ/MMAL interface that was recently destaged under
> platform/raspberrypi. The ISP driver, and thus this series depends on
> VCSM CMA driver for shared memory support (for lens shading buffers):
>
> https://lore.kernel.org/all/20260105-b4-vc-sm-cma-v2-0-4daea749ced9@ideasonboard.com/
>
> The ISP driver introduced in this series has been taken from the one
> present in the downstream raspberrypi 6.12 tree, squashing together
> various commits, along with minor cleanups and renaming directories. For
> testing it with libcamera, please use this branch that supports upstream
> unicam and the correct base ID for ISP controls:
>
> https://github.com/jailuthra/libcamera/tree/pi4-upstream
>
> Thanks,
> Jai
>
> Signed-off-by: Jai Luthra <jai.luthra at ideasonboard.com>
> ---
> Dave Stevenson (1):
>        media: videobuf2: Allow exporting of a struct dmabuf
>
> Jai Luthra (5):
>        platform/raspberrypi: vchiq-mmal: Move headers to include/linux
>        platform/raspberrypi: vchiq-mmal: Support ISP parameters and stats
>        platform/raspberrypi: vchiq-mmal: Support bayer and gray formats
>        platform/raspberrypi: vchiq: Add helpers for vchiq driver data
>        media: platform: broadcom: Move unicam driver to subdir
>
> Naushir Patuck (4):
>        media: uapi: v4l-ctrls: Add CID base for the bcm2835-isp driver
>        media: uapi: v4l2-core: Add ISP statistics output V4L2 fourcc type
>        media: platform: broadcom: Add bcm2835-isp driver
>        platform/raspberrypi: vchiq: Load bcm2835_isp driver from vchiq
>
>   Documentation/admin-guide/media/bcm2835-isp.rst    |  127 ++
>   .../userspace-api/media/drivers/index.rst          |    1 +
>   .../userspace-api/media/v4l/meta-formats.rst       |    1 +
>   .../media/v4l/pixfmt-meta-bcm2835-isp-stats.rst    |   35 +
>   MAINTAINERS                                        |   12 +-
>   drivers/media/common/videobuf2/videobuf2-core.c    |   21 +-
>   drivers/media/platform/broadcom/Kconfig            |   23 +-
>   drivers/media/platform/broadcom/Makefile           |    3 +-
>   .../media/platform/broadcom/bcm2835-isp/Kconfig    |   14 +
>   .../media/platform/broadcom/bcm2835-isp/Makefile   |    4 +
>   .../broadcom/bcm2835-isp/bcm2835-isp-ctrls.h       |   73 +
>   .../broadcom/bcm2835-isp/bcm2835-isp-fmts.h        |  558 ++++++
>   .../broadcom/bcm2835-isp/bcm2835-v4l2-isp.c        | 1836 ++++++++++++++++++++
>   .../media/platform/broadcom/bcm2835-unicam/Kconfig |   23 +
>   .../platform/broadcom/bcm2835-unicam/Makefile      |    3 +
>   .../{ => bcm2835-unicam}/bcm2835-unicam-regs.h     |    0
>   .../broadcom/{ => bcm2835-unicam}/bcm2835-unicam.c |    0
>   drivers/media/v4l2-core/v4l2-ioctl.c               |    1 +
>   .../raspberrypi/vchiq-interface/vchiq_arm.c        |    2 +
>   .../platform/raspberrypi/vchiq-mmal/mmal-vchiq.c   |    9 +-
>   .../linux/raspberrypi}/mmal-common.h               |    2 +
>   .../linux/raspberrypi}/mmal-encodings.h            |   68 +
>   .../linux/raspberrypi}/mmal-msg-common.h           |    0
>   .../linux/raspberrypi}/mmal-msg-format.h           |    0
>   .../linux/raspberrypi}/mmal-msg-port.h             |    0
>   .../linux/raspberrypi}/mmal-msg.h                  |    0
>   .../linux/raspberrypi}/mmal-parameters.h           |   86 +
>   .../linux/raspberrypi}/mmal-vchiq.h                |    0
>   include/linux/raspberrypi/vchiq_arm.h              |    1 +
>   include/linux/raspberrypi/vchiq_bus.h              |   10 +
>   include/media/videobuf2-core.h                     |   15 +
>   include/uapi/linux/bcm2835-isp.h                   |  347 ++++
>   include/uapi/linux/v4l2-controls.h                 |    6 +
>   include/uapi/linux/videodev2.h                     |    1 +
>   34 files changed, 3252 insertions(+), 30 deletions(-)
> ---
> base-commit: 8f0b4cce4481fb22653697cced8d0d04027cb1e8
> change-id: 20250923-b4-vchiq-isp-7e8c22c2860c
> prerequisite-message-id: 20260105-b4-vc-sm-cma-v2-0-4daea749ced9 at ideasonboard.com
> prerequisite-patch-id: 07e50207cc947f44e1d626b31d0ace7e12a8f3a1
> prerequisite-patch-id: 3d82a2605799686668729fdc2677c3f6b7c2aa0d
> prerequisite-patch-id: f65e3f6e8db823fcfc37421da10a76f92cf56d9d
> prerequisite-patch-id: dbfc2fc4237c738e499e802be972dd8f2736a714
> prerequisite-patch-id: 1898d91213e9bd75be3109180527fb0caf6d7174
> prerequisite-patch-id: d0cfc49c673c8c4a4c13d44a547104c24f57cb49
>
> Best regards,