Re: [PATCH v2 00/15] staging: vc04_services: bcm2835-isp support

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Hi Stefan,

On 11/10/23 4:02 PM, Stefan Wahren wrote:
Hi Umang,

Am 09.11.23 um 22:02 schrieb Umang Jain:
This series aims to upport bcm2835-isp from the RPi kernel.
It is developed on top of staging-next which comprises many
VC04 changes for it's de-staging. Hence, the merge of this
driver is targeted when VC04 is de-staged completely (which I
have been pushing), but it can be helped getting reviewed meanwhile.
Hence, the reason for posting the series.

Patch (01-02)/15  adds a new driver named vc-sm-cma to handle memory sharing
with the VC4 VPU.

Patch 03/15 adds a small extension to videobuf2 to allow exporting as a
dma_buf instead of a file-descriptor.

Patch (04-05)/15 adds a couple of improvements/support for
bcm2835-isp(event callback and zero-copy) to vchiq-mmal.

Patch (06-10)/15 adds the core bcm2835-isp driver along with headers
and format defintions. 09/15 is a standalone patch which can be merged
independently I believe.

Patch (11-12)/15 deals with the colorspace support.

Patch 13/15 allows multiple instances of the ISP.

Patch 14/15 adds a admin-guide document on bcm2835-isp.

Patch 15/15 deals with driver registeration.

since this is V2, i couldn't find a changelog? The first one was one
year ago, so it's very hard to remember. In such a case a link to the
last version is also helpful.

I am in your same situation. The changelog won't help here since the I have too have lost count of the iterations.

In brief, I would say, the patches have further cleaned up and aligned, rebased over the latest staging-next branch.
That majorly includes work I did for VC04 in general for de-staging.


Recently i saw you have a Github account. For such a complex series it's
also very helpful to provide a link to a working test branch with this
series applied. It's not a must, but appreciated.

I actually was going to send test branch but at the last minute I screwed up my .git repo because of a failed branch checkout.

I had to recreate the branches over the weekend and here they are:

I have tested these branches:

On RPi-3-b 32-bit:
Git branch: https://git.uk.ideasonboard.com/uajain/linux/commits/branch/uajain/rpi3/staging-next/isp

On RPi-4-b 64-bit:
Git branch: https://git.uk.ideasonboard.com/uajain/linux/commits/branch/uajain/rpi4/staging-next/isp

Both these branches have been tested with IMX219 sensor (there is a DT overlay included) and libcamera. These branches have bcm2835-unicam with streams support (which is handled by Laurent Pinchart as I believe) and on top sits bcm2835-isp (this series). You'll find DT and kernel configs I have tested with, in the respective branches.

As far as libcamera branch goes (it requires a special branch due to streams support):
https://git.uk.ideasonboard.com/uajain/libcamera/commits/branch/pinchartl/rpi/streams

Let me know how you get on if you are testing. I am happy to answer/help if you decide to test this.

Best regards


Dave Stevenson (6):
   staging: vc04_services: Add new vc-sm-cma driver
   media: videobuf2: Allow exporting of a struct dmabuf
   staging: mmal-vchiq: Add support for event callbacks
   staging: mmal-vchiq: Use vc-sm-cma to support zero copy
   staging: mmal_vchiq: Add image formats to be used by bcm2835-isp
   uapi: bcm2835-isp: Add bcm2835-isp uapi header file

David Plowman (2):
   vc04_services: bcm2835-isp: Allow formats with different colour spaces
   vc04_services: bcm2835-isp: Permit all sRGB colour spaces on ISP
     outputs

Naushir Patuck (4):
   media: uapi: v4l2-core: Add ISP statistics output V4L2 fourcc type
   staging: vc04_services: bcm2835-isp: Add a more complex ISP processing
     component
   staging: vc04_services: bcm2835_isp: Allow multiple users
   docs: admin-guide: media: bcm2835-isp: Add documentation for
     bcm2835-isp

Umang Jain (3):
   staging: vc04_services: vchiq_arm: Register vcsm-cma driver
   staging: vc04_services: Add helpers for vchiq driver data
   staging: vc04_services: vchiq: Register bcm2835-isp

  .../admin-guide/media/bcm2835-isp.rst         |  127 ++
  .../userspace-api/media/drivers/index.rst     |    1 +
  .../userspace-api/media/v4l/meta-formats.rst  |    1 +
  .../v4l/pixfmt-meta-bcm2835-isp-stats.rst     |   32 +
  MAINTAINERS                                   |    9 +
  .../media/common/videobuf2/videobuf2-core.c   |   36 +-
  drivers/media/v4l2-core/v4l2-ioctl.c          |    1 +
  drivers/staging/vc04_services/Kconfig         |    4 +
  drivers/staging/vc04_services/Makefile        |    3 +-
  .../staging/vc04_services/bcm2835-isp/Kconfig |   14 +
  .../vc04_services/bcm2835-isp/Makefile        |    4 +
  .../bcm2835-isp/bcm2835-isp-ctrls.h           |   72 +
  .../bcm2835-isp/bcm2835-isp-fmts.h            |  559 +++++
  .../bcm2835-isp/bcm2835-v4l2-isp.c            | 1822 +++++++++++++++++
  .../interface/vchiq_arm/vchiq_arm.c           |    6 +
  .../interface/vchiq_arm/vchiq_bus.h           |   10 +
  .../staging/vc04_services/vc-sm-cma/Kconfig   |   10 +
  .../staging/vc04_services/vc-sm-cma/Makefile  |    4 +
  .../staging/vc04_services/vc-sm-cma/vc_sm.c   |  817 ++++++++
  .../staging/vc04_services/vc-sm-cma/vc_sm.h   |   54 +
  .../vc04_services/vc-sm-cma/vc_sm_cma_vchi.c  |  507 +++++
  .../vc04_services/vc-sm-cma/vc_sm_cma_vchi.h  |   63 +
  .../vc04_services/vc-sm-cma/vc_sm_defs.h      |  187 ++
  .../vc04_services/vc-sm-cma/vc_sm_knl.h       |   28 +
  .../staging/vc04_services/vchiq-mmal/Kconfig  |    1 +
  .../vc04_services/vchiq-mmal/mmal-common.h    |    5 +
  .../vc04_services/vchiq-mmal/mmal-encodings.h |   66 +
  .../vc04_services/vchiq-mmal/mmal-msg.h       |   35 +
  .../vchiq-mmal/mmal-parameters.h              |  165 +-
  .../vc04_services/vchiq-mmal/mmal-vchiq.c     |  253 ++-
  .../vc04_services/vchiq-mmal/mmal-vchiq.h     |    5 +
  include/media/videobuf2-core.h                |   15 +
  include/uapi/linux/bcm2835-isp.h              |  347 ++++
  include/uapi/linux/v4l2-controls.h            |    5 +
  include/uapi/linux/videodev2.h                |    1 +
  35 files changed, 5235 insertions(+), 34 deletions(-)
  create mode 100644 Documentation/admin-guide/media/bcm2835-isp.rst
  create mode 100644 Documentation/userspace-api/media/v4l/pixfmt-meta-bcm2835-isp-stats.rst
  create mode 100644 drivers/staging/vc04_services/bcm2835-isp/Kconfig
  create mode 100644 drivers/staging/vc04_services/bcm2835-isp/Makefile
  create mode 100644 drivers/staging/vc04_services/bcm2835-isp/bcm2835-isp-ctrls.h   create mode 100644 drivers/staging/vc04_services/bcm2835-isp/bcm2835-isp-fmts.h   create mode 100644 drivers/staging/vc04_services/bcm2835-isp/bcm2835-v4l2-isp.c
  create mode 100644 drivers/staging/vc04_services/vc-sm-cma/Kconfig
  create mode 100644 drivers/staging/vc04_services/vc-sm-cma/Makefile
  create mode 100644 drivers/staging/vc04_services/vc-sm-cma/vc_sm.c
  create mode 100644 drivers/staging/vc04_services/vc-sm-cma/vc_sm.h
  create mode 100644 drivers/staging/vc04_services/vc-sm-cma/vc_sm_cma_vchi.c   create mode 100644 drivers/staging/vc04_services/vc-sm-cma/vc_sm_cma_vchi.h   create mode 100644 drivers/staging/vc04_services/vc-sm-cma/vc_sm_defs.h
  create mode 100644 drivers/staging/vc04_services/vc-sm-cma/vc_sm_knl.h
  create mode 100644 include/uapi/linux/bcm2835-isp.h






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