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Date:   Mon, 13 Nov 2023 19:08:39 +0530
From:   Umang Jain <umang.jain@...asonboard.com>
To:     Stefan Wahren <wahrenst@....net>, 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 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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