linux-kernel - Re: [PATCH v10, 16/17] media: mediatek: vcodec: support stateless VP9 decoding

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Date:   Thu, 5 May 2022 18:20:34 -0400
From:   Nícolas F. R. A. Prado 
        <nfraprado@...labora.com>
To:     Yunfei Dong <yunfei.dong@...iatek.com>
Cc:     Alexandre Courbot <acourbot@...omium.org>,
        Nicolas Dufresne <nicolas@...fresne.ca>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Benjamin Gaignard <benjamin.gaignard@...labora.com>,
        Tiffany Lin <tiffany.lin@...iatek.com>,
        Andrew-CT Chen <andrew-ct.chen@...iatek.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Tomasz Figa <tfiga@...gle.com>,
        George Sun <george.sun@...iatek.com>,
        Xiaoyong Lu <xiaoyong.lu@...iatek.com>,
        Hsin-Yi Wang <hsinyi@...omium.org>,
        Fritz Koenig <frkoenig@...omium.org>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Irui Wang <irui.wang@...iatek.com>,
        Steve Cho <stevecho@...omium.org>, 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,
        Project_Global_Chrome_Upstream_Group@...iatek.com
Subject: Re: [PATCH v10, 16/17] media: mediatek: vcodec: support stateless
 VP9 decoding

On Tue, Apr 26, 2022 at 06:08:27PM +0800, Yunfei Dong wrote:
> Add support for VP9 decoding using the stateless API,
> as supported by MT8192. And the drivers is lat and core architecture.
> 
> Signed-off-by: Yunfei Dong <yunfei.dong@...iatek.com>
> Signed-off-by: George Sun <george.sun@...iatek.com>
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> ---
>  .../media/platform/mediatek/vcodec/Makefile   |    1 +
>  .../vcodec/mtk_vcodec_dec_stateless.c         |   26 +-
>  .../platform/mediatek/vcodec/mtk_vcodec_drv.h |    1 +
>  .../vcodec/vdec/vdec_vp9_req_lat_if.c         | 2031 +++++++++++++++++
>  .../platform/mediatek/vcodec/vdec_drv_if.c    |    4 +
>  .../platform/mediatek/vcodec/vdec_drv_if.h    |    1 +
>  6 files changed, 2061 insertions(+), 3 deletions(-)
>  create mode 100644 drivers/media/platform/mediatek/vcodec/vdec/vdec_vp9_req_lat_if.c
> 

...

> +		use_128 = !frame_is_intra && !vsi->frame.uh.last_frame_type;
> +		v4l2_vp9_adapt_coef_probs(pre_frame_ctx_helper,
> +					  counts_helper,
> +					  use_128,
> +					  frame_is_intra);

Hi Yunfei,

I'm getting

ERROR: modpost: "v4l2_vp9_adapt_noncoef_probs" [drivers/media/platform/mediatek/vcodec/mtk-vcodec-dec.ko] undefined!
ERROR: modpost: "v4l2_vp9_adapt_coef_probs" [drivers/media/platform/mediatek/vcodec/mtk-vcodec-dec.ko] undefined!

when building this series.

Adding
	select V4L2_VP9
to
	config VIDEO_MEDIATEK_VCODEC
solved the issue.

Thanks,
Nícolas