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Message-ID: <e4d01c27aa976c44e0b7122e39111be062a4deb4.camel@ndufresne.ca>
Subject: Re: [PATCH] media: verisilicon: AV1: Be more fexible on postproc
 capabilities
From: Nicolas Dufresne <nicolas@ndufresne.ca>
To: Benjamin Gaignard <benjamin.gaignard@collabora.com>, 
	ezequiel@vanguardiasur.com.ar, p.zabel@pengutronix.de, mchehab@kernel.org, 
	heiko@sntech.de
Cc: linux-media@vger.kernel.org, linux-rockchip@lists.infradead.org, 
	linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, 
	kernel@collabora.com
Date: Thu, 04 Apr 2024 13:59:33 -0400
In-Reply-To: <20240328093439.18712-1-benjamin.gaignard@collabora.com>
References: <20240328093439.18712-1-benjamin.gaignard@collabora.com>
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Hi,

Le jeudi 28 mars 2024 =C3=A0 10:34 +0100, Benjamin Gaignard a =C3=A9crit=C2=
=A0:
> RK3588 post-processor block is able to convert 10 bits streams
> into 8 bits pixels format.

Does it come with any HDR to SDR capabilities ? cause stripping off 2 bits =
means
that tone mapping will cause a lot of banding as it won't have the expected
precision. I'm simply trying to make up the big portrait so we don't just o=
ffer
yet another foot gun. But perhaps its fine to offer this, its just that we =
don't
have a mechanism to report which pixel format in the selection will cause d=
ata
lost.

Nicolas

>=20
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@collabora.com>
> Fixes: 003afda97c65 ("media: verisilicon: Enable AV1 decoder on rk3588")
> ---
>  drivers/media/platform/verisilicon/rockchip_vpu_hw.c | 1 -
>  1 file changed, 1 deletion(-)
>=20
> diff --git a/drivers/media/platform/verisilicon/rockchip_vpu_hw.c b/drive=
rs/media/platform/verisilicon/rockchip_vpu_hw.c
> index f97527670783..964122e7c355 100644
> --- a/drivers/media/platform/verisilicon/rockchip_vpu_hw.c
> +++ b/drivers/media/platform/verisilicon/rockchip_vpu_hw.c
> @@ -82,7 +82,6 @@ static const struct hantro_fmt rockchip_vpu981_postproc=
_fmts[] =3D {
>  	{
>  		.fourcc =3D V4L2_PIX_FMT_NV12,
>  		.codec_mode =3D HANTRO_MODE_NONE,
> -		.match_depth =3D true,
>  		.postprocessed =3D true,
>  		.frmsize =3D {
>  			.min_width =3D ROCKCHIP_VPU981_MIN_SIZE,