linux-kernel - Re: [PATCH 5/7] media: Hantro: HEVC: Allows 10-bit bitstream

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Message-ID: <Yr3fkPrQXqT+UZNa@eze-laptop>
Date:   Thu, 30 Jun 2022 14:38:24 -0300
From:   Ezequiel Garcia <ezequiel@...guardiasur.com.ar>
To:     Benjamin Gaignard <benjamin.gaignard@...labora.com>
Cc:     mchehab@...nel.org, hverkuil@...all.nl, 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,
        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 5/7] media: Hantro: HEVC: Allows 10-bit bitstream

Hi Benjamin,

On Fri, Jun 17, 2022 at 01:58:00PM +0200, Benjamin Gaignard wrote:
> Stop limiting HEVC support to 8-bits bitstreams also
> accept 10-bits bitstreams.
> 
> Signed-off-by: Benjamin Gaignard <benjamin.gaignard@...labora.com>
> ---
>  drivers/staging/media/hantro/hantro_hevc.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/staging/media/hantro/hantro_hevc.c b/drivers/staging/media/hantro/hantro_hevc.c
> index e06837108a09..85688a4df166 100644
> --- a/drivers/staging/media/hantro/hantro_hevc.c
> +++ b/drivers/staging/media/hantro/hantro_hevc.c
> @@ -159,8 +159,8 @@ int hantro_hevc_validate_sps(struct hantro_ctx *ctx, const struct v4l2_ctrl_hevc

I'd like to go back to checking the SPS control directly
in hantro_try_ctrl. I believe the best and most reasonable
place to validate the controls would be TRY_CTRL.

See https://patchwork.linuxtv.org/project/linux-media/patch/20220629195624.45745-2-ezequiel@vanguardiasur.com.ar/.

>  	if (sps->bit_depth_luma_minus8 != sps->bit_depth_chroma_minus8)
>  		/* Luma and chroma bit depth mismatch */
>  		return -EINVAL;
> -	if (sps->bit_depth_luma_minus8 != 0)
> -		/* Only 8-bit is supported */
> +	if (sps->bit_depth_luma_minus8 != 0 && sps->bit_depth_luma_minus8 != 2)
> +		/* Only 8-bit and 10-bit is supported */

Having said that, the change looks good:

Reviewed-by: Ezequiel Garcia <ezequiel@...guardiasur.com.ar>

Thanks,
Ezequiel

>  		return -EINVAL;
>  
>  	ctx->bit_depth = sps->bit_depth_luma_minus8 + 8;
> -- 
> 2.32.0
>