linux-kernel - Re: [DKIM] [PATCH v12, 13/17] media: mediatek: vcodec: Extract H264 common code

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Message-ID: <03e09da3-c068-a372-a3e5-dc0459f90682@xs4all.nl>
Date:   Thu, 12 May 2022 11:31:36 +0200
From:   Hans Verkuil <hverkuil-cisco@...all.nl>
To:     Yunfei Dong <yunfei.dong@...iatek.com>,
        Alexandre Courbot <acourbot@...omium.org>,
        Nicolas Dufresne <nicolas@...fresne.ca>,
        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>
Cc:     Irui Wang <irui.wang@...iatek.com>,
        George Sun <george.sun@...iatek.com>,
        Steve Cho <stevecho@...omium.org>, devicetree@...r.kernel.org,
        Project_Global_Chrome_Upstream_Group@...iatek.com,
        linux-kernel@...r.kernel.org,
        dri-devel <dri-devel@...ts.freedesktop.org>,
        Xiaoyong Lu <xiaoyong.lu@...iatek.com>,
        linux-mediatek@...ts.infradead.org,
        Hsin-Yi Wang <hsinyi@...omium.org>,
        Fritz Koenig <frkoenig@...omium.org>,
        linux-arm-kernel@...ts.infradead.org, linux-media@...r.kernel.org
Subject: Re: [DKIM] [PATCH v12, 13/17] media: mediatek: vcodec: Extract H264
 common code

Hi Yunfei,

On 5/12/22 04:19, Yunfei Dong wrote:
> Mt8192 can use some of common code with mt8183. Moves them to
> a new file in order to reuse.
> 
> Signed-off-by: Yunfei Dong <yunfei.dong@...iatek.com>
> Reviewed-by: Nicolas Dufresne <nicolas.dufresne@...labora.com>
> ---
>  .../media/platform/mediatek/vcodec/Makefile   |   1 +
>  .../vcodec/vdec/vdec_h264_req_common.c        | 310 +++++++++++++
>  .../vcodec/vdec/vdec_h264_req_common.h        | 274 +++++++++++
>  .../mediatek/vcodec/vdec/vdec_h264_req_if.c   | 427 ++----------------
>  4 files changed, 629 insertions(+), 383 deletions(-)
>  create mode 100644 drivers/media/platform/mediatek/vcodec/vdec/vdec_h264_req_common.c
>  create mode 100644 drivers/media/platform/mediatek/vcodec/vdec/vdec_h264_req_common.h
> 
> diff --git a/drivers/media/platform/mediatek/vcodec/Makefile b/drivers/media/platform/mediatek/vcodec/Makefile
> index 359619653a0e..3f41d748eee5 100644
> --- a/drivers/media/platform/mediatek/vcodec/Makefile
> +++ b/drivers/media/platform/mediatek/vcodec/Makefile
> @@ -9,6 +9,7 @@ mtk-vcodec-dec-y := vdec/vdec_h264_if.o \
>  		vdec/vdec_vp8_if.o \
>  		vdec/vdec_vp9_if.o \
>  		vdec/vdec_h264_req_if.o \
> +		vdec/vdec_h264_req_common.o \
>  		mtk_vcodec_dec_drv.o \
>  		vdec_drv_if.o \
>  		vdec_vpu_if.o \
> diff --git a/drivers/media/platform/mediatek/vcodec/vdec/vdec_h264_req_common.c b/drivers/media/platform/mediatek/vcodec/vdec/vdec_h264_req_common.c
> new file mode 100644
> index 000000000000..4e7c9d47751d
> --- /dev/null
> +++ b/drivers/media/platform/mediatek/vcodec/vdec/vdec_h264_req_common.c
> @@ -0,0 +1,310 @@

<snip>

Here there is still a cast to iomem:

> +void mtk_vdec_h264_copy_scaling_matrix(struct slice_api_h264_scaling_matrix *dst_matrix,
> +				       const struct v4l2_ctrl_h264_scaling_matrix *src_matrix)
> +{
> +	memcpy_toio((void __iomem *)dst_matrix->scaling_list_4x4, src_matrix->scaling_list_4x4,
> +		    sizeof(dst_matrix->scaling_list_4x4));
> +
> +	memcpy_toio((void __iomem *)dst_matrix->scaling_list_8x8, src_matrix->scaling_list_8x8,
> +		    sizeof(dst_matrix->scaling_list_8x8));
> +}

<snip>

> diff --git a/drivers/media/platform/mediatek/vcodec/vdec/vdec_h264_req_if.c b/drivers/media/platform/mediatek/vcodec/vdec/vdec_h264_req_if.c
> index 27119aa31dd9..b055ceea481d 100644
> --- a/drivers/media/platform/mediatek/vcodec/vdec/vdec_h264_req_if.c
> +++ b/drivers/media/platform/mediatek/vcodec/vdec/vdec_h264_req_if.c

<snip>

> -static void
> -get_h264_scaling_matrix(struct slice_api_h264_scaling_matrix *dst_matrix,
> -			const struct v4l2_ctrl_h264_scaling_matrix *src_matrix)
> -{
> -	memcpy(dst_matrix->scaling_list_4x4, src_matrix->scaling_list_4x4,
> -	       sizeof(dst_matrix->scaling_list_4x4));
> -
> -	memcpy(dst_matrix->scaling_list_8x8, src_matrix->scaling_list_8x8,
> -	       sizeof(dst_matrix->scaling_list_8x8));
> -}

but that function was moved (AFAICT) from vdec_h264_req_if.c where a regular memcpy was
used.

Did you miss one iomem case?

Can I change mtk_vdec_h264_copy_scaling_matrix() to:

void mtk_vdec_h264_copy_scaling_matrix(struct slice_api_h264_scaling_matrix *dst_matrix,
				       const struct v4l2_ctrl_h264_scaling_matrix *src_matrix)
{
	memcpy(dst_matrix->scaling_list_4x4, src_matrix->scaling_list_4x4,
	       sizeof(dst_matrix->scaling_list_4x4));

	memcpy(dst_matrix->scaling_list_8x8, src_matrix->scaling_list_8x8,
	       sizeof(dst_matrix->scaling_list_8x8));
}

If that's OK, then I'll do that manually, so no need to post a v13.

Everything else looks fine, so this is the only issue that needs to be resolved.

Regards,

	Hans