linux-kernel - Re: [PATCH v2 5/7] media: hantro: postproc: Properly calculate chroma offset

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Date:   Wed, 29 Jun 2022 16:14:40 -0300
From:   Ezequiel Garcia <ezequiel@...guardiasur.com.ar>
To:     Jernej Skrabec <jernej.skrabec@...il.com>
Cc:     p.zabel@...gutronix.de, mchehab@...nel.org,
        hverkuil-cisco@...all.nl, benjamin.gaignard@...labora.com,
        nicolas.dufresne@...labora.com, gregkh@...uxfoundation.org,
        linux-media@...r.kernel.org, linux-staging@...ts.linux.dev,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-rockchip@...ts.infradead.org
Subject: Re: [PATCH v2 5/7] media: hantro: postproc: Properly calculate
 chroma offset

Hi Jernej,

On Thu, Jun 16, 2022 at 10:25:11PM +0200, Jernej Skrabec wrote:
> Currently chroma offset calculation assumes only 1 byte per luma, with
> no consideration for stride.
> 
> Take necessary information from destination pixel format which makes
> calculation completely universal.
> 
> Signed-off-by: Jernej Skrabec <jernej.skrabec@...il.com>

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

Thanks,
Ezequiel

> ---
>  drivers/staging/media/hantro/hantro_postproc.c | 4 +++-
>  1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/staging/media/hantro/hantro_postproc.c b/drivers/staging/media/hantro/hantro_postproc.c
> index 8933b4af73ed..a0928c508434 100644
> --- a/drivers/staging/media/hantro/hantro_postproc.c
> +++ b/drivers/staging/media/hantro/hantro_postproc.c
> @@ -113,12 +113,14 @@ static void hantro_postproc_g2_enable(struct hantro_ctx *ctx)
>  {
>  	struct hantro_dev *vpu = ctx->dev;
>  	struct vb2_v4l2_buffer *dst_buf;
> -	size_t chroma_offset = ctx->dst_fmt.width * ctx->dst_fmt.height;
>  	int down_scale = down_scale_factor(ctx);
> +	size_t chroma_offset;
>  	dma_addr_t dst_dma;
>  
>  	dst_buf = hantro_get_dst_buf(ctx);
>  	dst_dma = vb2_dma_contig_plane_dma_addr(&dst_buf->vb2_buf, 0);
> +	chroma_offset = ctx->dst_fmt.plane_fmt[0].bytesperline *
> +			ctx->dst_fmt.height;
>  
>  	if (down_scale) {
>  		hantro_reg_write(vpu, &g2_down_scale_e, 1);
> -- 
> 2.36.1
>