linux-kernel - Re: [PATCH v2 0/4] media: HEVC: RPS clean up

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Date:   Tue, 9 Nov 2021 15:35:05 +0100
From:   Benjamin Gaignard <benjamin.gaignard@...labora.com>
To:     mchehab@...nel.org, p.zabel@...gutronix.de,
        gregkh@...uxfoundation.org, mripard@...nel.org,
        paul.kocialkowski@...tlin.com, wens@...e.org,
        jernej.skrabec@...il.com, hverkuil-cisco@...all.nl,
        jc@...esim.co.uk, ezequiel@...guardiasur.com.ar
Cc:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-rockchip@...ts.infradead.org, linux-staging@...ts.linux.dev,
        linux-arm-kernel@...ts.infradead.org, linux-sunxi@...ts.linux.dev
Subject: Re: [PATCH v2 0/4] media: HEVC: RPS clean up


Le 12/10/2021 à 16:35, Benjamin Gaignard a écrit :
> This series aims to clean up Reference Picture Set usage and flags.
>
> Long term flag was named with RPS prefix while it is not used for RPS
> but for mark long term references in DBP. Remane it and remove the two
> other useless RPS flags.
>
> Clarify documentation about RPS lists content and make sure that Hantro
> driver use them correctly (i.e without look up in DBP).

This series generates feedback about what is missing to move HEVC uAPI
out of staging but lack of remarks about the proposed changes themselves.
Does someone has an opinion about this RPS flag clean up ?

Regards,
Benjamin

>
> These patches are the last in my backlog impacting HEVC uAPI.
>  From my point of view, once they get merged, you could start talking
> about how move HEVC uAPI to stable.
>
> version 2:
> - change DPB field name from rps to flags
>
> Please note that the only purpose of commits 3 and 4 is to allow to test
> G2 hardware block for IMX8MQ until a proper solution isuing power domain
> can be found. Do not merge them.
>
> GStreamer HEVC plugin merge request can be found here:
> https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/1079
>
> With those piece of code fluster score is 77/147.
>
> Benjamin
>
> Benjamin Gaignard (4):
>    media: hevc: Remove RPS named flags
>    media: hevc: Embedded indexes in RPS
>    media: hantro: Use syscon instead of 'ctrl' register
>    arm64: dts: imx8mq: Add node to G2 hardware
>
>   .../media/v4l/ext-ctrls-codec.rst             | 14 +++---
>   arch/arm64/boot/dts/freescale/imx8mq.dtsi     | 43 +++++++++++++----
>   drivers/staging/media/hantro/hantro.h         |  5 +-
>   .../staging/media/hantro/hantro_g2_hevc_dec.c | 27 +++--------
>   drivers/staging/media/hantro/imx8m_vpu_hw.c   | 48 ++++++++++++-------
>   .../staging/media/sunxi/cedrus/cedrus_h265.c  |  2 +-
>   include/media/hevc-ctrls.h                    |  6 +--
>   7 files changed, 84 insertions(+), 61 deletions(-)
>