linux-kernel - Re: [RFC PATCH 0/9] V4L2 Jobs API WIP

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Date:   Mon, 23 Oct 2017 17:03:23 -0200
From:   Gustavo Padovan <gustavo@...ovan.org>
To:     Hans Verkuil <hverkuil@...all.nl>
Cc:     Alexandre Courbot <acourbot@...omium.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Pawel Osciak <pawel@...iak.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Tomasz Figa <tfiga@...omium.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Gustavo Padovan <gustavo.padovan@...labora.com>,
        linux-media@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [RFC PATCH 0/9] V4L2 Jobs API WIP

2017-10-16 Hans Verkuil <hverkuil@...all.nl>:

> Hi Alexandre,
> 
> Thank you very much for working on this. Much appreciated!
> 
> I only did a very high-level review of the patch series: there is not much
> point IMHO of doing a detailed review given the upcoming discussions in
> Prague. It's better to wait until we agree with the high-level API.
> 
> Regarding the public API: the ioctls seem sane. It's all very similar to the
> other implementations we've seen.
> 
> I'm still not sure about the name 'job', but this is 'just' a naming issue.
> 
> The part where I have more doubts is the need to create a new device node.
> 
> For the upcoming meeting I would like to discuss whether this cannot be added
> to the media API.
> 
> Originally the plan was that the media API would be subsystem-agnostic and could
> also be used by ALSA/DRM/etc. This never happened and I also am not aware of any
> movement in that area.
> 
> I am wondering whether we should just be realistic and abandon the 'subsystem
> agnostic' part and be willing to add e.g. the job support to the media API.

Stupid question here: is there any techinically possible way to support
it through the media API while being subsystem agnostic?

Gustavo