linux-kernel - Re: [PATCH v6 07/10] media: mediatek: vcodec: Fix vp9 4096x2176 fail for profile2

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Message-ID: <03d3228206dbeb7f3fdb9466f84511f598ae9d65.camel@collabora.com>
Date: Thu, 11 Dec 2025 15:32:30 -0500
From: Nicolas Dufresne <nicolas.dufresne@...labora.com>
To: Kyrie Wu <kyrie.wu@...iatek.com>, Tiffany Lin
 <tiffany.lin@...iatek.com>,  Andrew-CT Chen <andrew-ct.chen@...iatek.com>,
 Yunfei Dong <yunfei.dong@...iatek.com>, Mauro Carvalho Chehab	
 <mchehab@...nel.org>, Rob Herring <robh@...nel.org>, Krzysztof Kozlowski	
 <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, Matthias Brugger	
 <matthias.bgg@...il.com>, AngeloGioacchino Del Regno	
 <angelogioacchino.delregno@...labora.com>, Hans Verkuil
 <hverkuil@...all.nl>,  Nathan Hebert <nhebert@...omium.org>, Arnd Bergmann
 <arnd@...db.de>, Irui Wang <irui.wang@...iatek.com>,  George Sun
 <george.sun@...iatek.com>, linux-media@...r.kernel.org,
 devicetree@...r.kernel.org, 	linux-kernel@...r.kernel.org,
 linux-arm-kernel@...ts.infradead.org, 	linux-mediatek@...ts.infradead.org
Cc: Neil Armstrong <neil.armstrong@...aro.org>, Andrzej Pietrasiewicz
	 <andrzejtp2010@...il.com>, Yilong Zhou <yilong.zhou@...iatek.com>
Subject: Re: [PATCH v6 07/10] media: mediatek: vcodec: Fix vp9 4096x2176
 fail for profile2

Le mardi 02 décembre 2025 à 15:40 +0800, Kyrie Wu a écrit :
> The DRAM address of the VP9 decoder tile info buffers may require
> as much as 36bits for 4096x2176 resolution. Fold the 4 most significant
> bits into the lower (padding) four bits of address.
> 
> Fixes: 5d418351ca8f1 ("media: mediatek: vcodec: support stateless VP9 decoding")
> 
> Signed-off-by: Kyrie Wu <kyrie.wu@...iatek.com>
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>

Reviewed-by: Nicolas Dufresne <nicolas.dufresne@...labora.com>

> ---
>  .../mediatek/vcodec/decoder/vdec/vdec_vp9_req_lat_if.c | 10 +++++++++-
>  1 file changed, 9 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/media/platform/mediatek/vcodec/decoder/vdec/vdec_vp9_req_lat_if.c b/drivers/media/platform/mediatek/vcodec/decoder/vdec/vdec_vp9_req_lat_if.c
> index 36a87b455d11..eca6280098be 100644
> --- a/drivers/media/platform/mediatek/vcodec/decoder/vdec/vdec_vp9_req_lat_if.c
> +++ b/drivers/media/platform/mediatek/vcodec/decoder/vdec/vdec_vp9_req_lat_if.c
> @@ -1134,9 +1134,17 @@ static int vdec_vp9_slice_setup_tile_buffer(struct vdec_vp9_slice_instance *inst
>  					return -EINVAL;
>  			}
>  			tiles->size[i][j] = size;
> +			/*
> +			 * If the system supports 64-bit DMA addresses, the upper 4 bits
> +			 * of the address are also encoded into the buffer entry.
> +			 * The buffer pointer (tb) is incremented after each entry is written.
> +			 */
>  			if (tiles->mi_rows[i]) {
>  				*tb++ = (size << 3) + ((offset << 3) & 0x7f);
> -				*tb++ = pa & ~0xf;
> +				*tb = pa & GENMASK(31, 4);
> +				if (IS_ENABLED(CONFIG_ARCH_DMA_ADDR_T_64BIT))
> +					*tb |= (pa >> 32) & GENMASK(3, 0);
> +				tb++;
>  				*tb++ = (pa << 3) & 0x7f;
>  				mi_row = (tiles->mi_rows[i] - 1) & 0x1ff;
>  				mi_col = (tiles->mi_cols[j] - 1) & 0x3f;

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