linux-kernel - Re: [PATCH v2 0/2] Document memory-to-memory video codec interfaces

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Date:   Tue, 23 Oct 2018 09:54:14 +0900
From:   Tomasz Figa <tfiga@...omium.org>
To:     Hans Verkuil <hverkuil@...all.nl>
Cc:     Linux Media Mailing List <linux-media@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Pawel Osciak <posciak@...omium.org>,
        Alexandre Courbot <acourbot@...omium.org>, kamil@...as.org,
        a.hajda@...sung.com, Kyungmin Park <kyungmin.park@...sung.com>,
        jtp.park@...sung.com, Philipp Zabel <p.zabel@...gutronix.de>,
        Tiffany Lin (林慧珊) 
        <tiffany.lin@...iatek.com>,
        Andrew-CT Chen (陳智迪) 
        <andrew-ct.chen@...iatek.com>,
        Stanimir Varbanov <stanimir.varbanov@...aro.org>,
        todor.tomov@...aro.org, nicolas@...fresne.ca,
        Paul Kocialkowski <paul.kocialkowski@...tlin.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        dave.stevenson@...pberrypi.org,
        Ezequiel Garcia <ezequiel@...labora.com>,
        Maxime Jourdan <maxi.jourdan@...adoo.fr>
Subject: Re: [PATCH v2 0/2] Document memory-to-memory video codec interfaces

Hi Hans,

On Tue, Oct 23, 2018 at 12:41 AM Hans Verkuil <hverkuil@...all.nl> wrote:
>
> Hi Tomasz, Alexandre,
>
> Thank you for all your work! Much appreciated.
>
> I've applied both the stateful and stateless patches on top of the request_api branch
> and made the final result available here:
>
> https://hverkuil.home.xs4all.nl/request-api/
>
> Tomasz, I got two warnings when building the doc tree, the patch below fixes it.
>
> Regards,
>
>         Hans
>
> Signed-off-by: Hans Verkuil <hans.verkuil@...co.com>
>
> diff --git a/Documentation/media/uapi/v4l/dev-decoder.rst b/Documentation/media/uapi/v4l/dev-decoder.rst
> index 09c7a6621b8e..5522453ac39f 100644
> --- a/Documentation/media/uapi/v4l/dev-decoder.rst
> +++ b/Documentation/media/uapi/v4l/dev-decoder.rst
> @@ -972,11 +972,11 @@ sequence was started.
>
>     .. warning::
>
> -   The sentence can be only initiated if both ``OUTPUT`` and ``CAPTURE`` queues

This should also have been s/sentence/sequence/.

> -   are streaming. For compatibility reasons, the call to
> -   :c:func:`VIDIOC_DECODER_CMD` will not fail even if any of the queues is not
> -   streaming, but at the same time it will not initiate the `Drain` sequence
> -   and so the steps described below would not be applicable.
> +      The sentence can be only initiated if both ``OUTPUT`` and ``CAPTURE`` queues
> +      are streaming. For compatibility reasons, the call to
> +      :c:func:`VIDIOC_DECODER_CMD` will not fail even if any of the queues is not
> +      streaming, but at the same time it will not initiate the `Drain` sequence
> +      and so the steps described below would not be applicable.
>
>  2. Any ``OUTPUT`` buffers queued by the client before the
>     :c:func:`VIDIOC_DECODER_CMD` was issued will be processed and decoded as
> diff --git a/Documentation/media/uapi/v4l/dev-encoder.rst b/Documentation/media/uapi/v4l/dev-encoder.rst
> index 41139e5e48eb..7f49a7149067 100644
> --- a/Documentation/media/uapi/v4l/dev-encoder.rst
> +++ b/Documentation/media/uapi/v4l/dev-encoder.rst
> @@ -448,11 +448,11 @@ sequence was started.
>
>     .. warning::
>
> -   The sentence can be only initiated if both ``OUTPUT`` and ``CAPTURE`` queues

Ditto.

> -   are streaming. For compatibility reasons, the call to
> -   :c:func:`VIDIOC_ENCODER_CMD` will not fail even if any of the queues is not
> -   streaming, but at the same time it will not initiate the `Drain` sequence
> -   and so the steps described below would not be applicable.
> +      The sentence can be only initiated if both ``OUTPUT`` and ``CAPTURE`` queues
> +      are streaming. For compatibility reasons, the call to
> +      :c:func:`VIDIOC_ENCODER_CMD` will not fail even if any of the queues is not
> +      streaming, but at the same time it will not initiate the `Drain` sequence
> +      and so the steps described below would not be applicable.

Last minute changes after proof reading...

Thanks for fixing up and uploading the html version!

Best regards,
Tomasz