linux-kernel - Re: [PATCH v2 0/7] Enable 10bits bitstream for Hantro/G2 HEVC codec

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Date:   Mon, 18 Jul 2022 12:12:47 +0200
From:   Hans Verkuil <hverkuil@...all.nl>
To:     Benjamin Gaignard <benjamin.gaignard@...labora.com>,
        mchehab@...nel.org, ezequiel@...guardiasur.com.ar,
        p.zabel@...gutronix.de, gregkh@...uxfoundation.org,
        mripard@...nel.org, paul.kocialkowski@...tlin.com, wens@...e.org,
        jernej.skrabec@...il.com, samuel@...lland.org,
        nicolas.dufresne@...labora.com, andrzej.p@...labora.com
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,
        kernel@...labora.com
Subject: Re: [PATCH v2 0/7] Enable 10bits bitstream for Hantro/G2 HEVC codec

On 7/18/22 10:39, Benjamin Gaignard wrote:
> Since v1 Jernej patches to support 10 bits decoding have been merged.
> This v2 rebase the previously send patches and add Ezequiel reviewed-by
> tag.
> This series add 10bits support for newer hardware blocks (i.e without
> legacy regs) and for HEVC codec.
> 
> It based tested on IMX8MQ with HEVC conformance tests.
> The results are that all 10bits bitstreams are OK.
> 
> The problematic point raise by this series is the question of where 
> to put HEVC validation function. Does it have to be only hantro_try_ctrl()
> or shall it be done also in .run().
> This series doesn't change that behavoir so I will argue in farvor to
> merge it and to work on this validation time problem when unstaging 
> the driver.
> Hans, Ezequiel may that sound acceptable for you ? 

Hmm, the hantro driver will be unstaged either this week or (hopefully)
very early on in the next cycle. So I think you should no longer consider
hantro as a staging driver but as a regular mainline driver.

This series definitely won't make the 5.20 cut, so I think it makes more
sense to get this right before merging it.

Regards,

	Hans

> 
> Regards,
> Benjamin
> 
> Benjamin Gaignard (7):
>   media: hantro: Store HEVC bit depth in context
>   media: hantro: HEVC: Fix auxilary buffer size calculation
>   media: hantro: HEVC: Fix chroma offset computation
>   media: hantro: postproc: Configure output regs to support 10bit
>   media: Hantro: HEVC: Allows 10-bit bitstream
>   media: hantro: imx8m: Enable 10bit decoding
>   media: hantro: Allows luma and chroma depth to be different
> 
>  .../staging/media/hantro/hantro_g2_hevc_dec.c |  4 +--
>  drivers/staging/media/hantro/hantro_hevc.c    | 13 +++++----
>  .../staging/media/hantro/hantro_postproc.c    |  7 ++++-
>  drivers/staging/media/hantro/imx8m_vpu_hw.c   | 27 +++++++++++++++++++
>  4 files changed, 40 insertions(+), 11 deletions(-)
>