Message-ID: <db3ec8ed-35d3-495c-b701-370fe614693d@gmx.net>
Date:   Mon, 13 Nov 2023 16:09:58 +0100
From:   Stefan Wahren <wahrenst@....net>
To:     Umang Jain <umang.jain@...asonboard.com>,
        linux-media@...r.kernel.org, kernel-list@...pberrypi.com,
        linux-kernel@...r.kernel.org, linux-rpi-kernel@...ts.infradead.org,
        linux-arm-kernel@...ts.infradead.org, linux-staging@...ts.linux.dev
Cc:     Dave Stevenson <dave.stevenson@...pberrypi.com>,
        Kieran Bingham <kieran.bingham@...asonboard.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        "Ricardo B . Marliere" <ricardo@...liere.net>,
        Dan Carpenter <error27@...il.com>
Subject: Re: [PATCH v2 00/15] staging: vc04_services: bcm2835-isp support

Hi Umang,

Am 13.11.23 um 14:38 schrieb Umang Jain:
> 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.
since this version
https://lore.kernel.org/lkml/910dbd8f-85f2-4979-49ee-6d760e89af84@ideasonboard.com/T/#mca165d5dcb1ba9f3ff3bf91ca2bc6ec2d3ae1c29

there were some feedback from other people like Laurent. I think it's
necessary to know if all the comments has been addressed or not. I think
there is no need to list every single change.

>
>>
>> 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.
This is great, i don't know when i've the time to test, but it also give
others the chance to do tests.

Regards
>>
>> 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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