linux-kernel - Re: [PATCH v2 0/3] media: vimc: Allow multiple capture devices to use the same sensor

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Message-ID: <20200724121521.GA2705690@oden.dyn.berto.se>
Date:   Fri, 24 Jul 2020 14:15:21 +0200
From:   Niklas Söderlund 
        <niklas.soderlund@...natech.se>
To:     Kaaira Gupta <kgupta@...iitr.ac.in>
Cc:     Helen Koike <helen.koike@...labora.com>,
        Shuah Khan <skhan@...uxfoundation.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        Kieran Bingham <kieran.bingham@...asonboard.com>
Subject: Re: [PATCH v2 0/3] media: vimc: Allow multiple capture devices to
 use the same sensor

Hi Kaaira,

Thanks for your work.

On 2020-07-24 17:32:10 +0530, Kaaira Gupta wrote:
> This is version 2 of the patch series posted by Niklas for allowing
> multiple streams in VIMC.
> The original series can be found here:
> https://patchwork.kernel.org/cover/10948831/
> 
> This series adds support for two (or more) capture devices to be 
> connected to the same sensors and run simultaneously. Each capture device 
> can be started and stopped independent of each other.
> 
> Patch 1/3 and 2/3 deals with solving the issues that arises once two 
> capture devices can be part of the same pipeline. While 3/3 allows for 
> two capture devices to be part of the same pipeline and thus allows for 
> simultaneously use.

I'm just curious if you are aware of this series? It would replace the 
need for 1/3 and 2/3 of this series right?

1.  https://lore.kernel.org/linux-media/20200522075522.6190-1-dafna.hirschfeld@collabora.com/

> 
> Changes since v1:
> 	- All three patches rebased on latest media-tree.
> 	Patch 3:
> 	- Search for an entity with a non-NULL pipe instead of searching
> 	  for sensor. This terminates the search at output itself.
> 
> Kaaira Gupta (3):
>   media: vimc: Add usage count to subdevices
>   media: vimc: Serialize vimc_streamer_s_stream()
>   media: vimc: Join pipeline if one already exists
> 
>  .../media/test-drivers/vimc/vimc-capture.c    | 35 ++++++++++++++++++-
>  .../media/test-drivers/vimc/vimc-debayer.c    |  8 +++++
>  drivers/media/test-drivers/vimc/vimc-scaler.c |  8 +++++
>  drivers/media/test-drivers/vimc/vimc-sensor.c |  9 ++++-
>  .../media/test-drivers/vimc/vimc-streamer.c   | 23 +++++++-----
>  5 files changed, 73 insertions(+), 10 deletions(-)
> 
> -- 
> 2.17.1
> 

-- 
Regards,
Niklas Söderlund