linux-kernel - Re: [PATCH 3/7] media: mediatek: vcodec: Setting the supported h265 level for each platform

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Message-ID: <20231021092535.hna2fzgbevluczm4@basti-XPS-13-9310>
Date:   Sat, 21 Oct 2023 11:25:35 +0200
From:   Sebastian Fricke <sebastian.fricke@...labora.com>
To:     Yunfei Dong <yunfei.dong@...iatek.com>
Cc:     Nícolas F . R . A . Prado 
        <nfraprado@...labora.com>,
        Nicolas Dufresne <nicolas.dufresne@...labora.com>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Benjamin Gaignard <benjamin.gaignard@...labora.com>,
        Nathan Hebert <nhebert@...omium.org>,
        Chen-Yu Tsai <wenst@...omium.org>,
        Hsin-Yi Wang <hsinyi@...omium.org>,
        Fritz Koenig <frkoenig@...omium.org>,
        Daniel Vetter <daniel@...ll.ch>,
        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 3/7] media: mediatek: vcodec: Setting the supported h265
 level for each platform

Hey Yunfei,

On 16.10.2023 14:43, Yunfei Dong wrote:
>The supported resolution and fps of different platforms are not the
>same. Need to set the supported level according to the chip name.

I would suggest the following rewording:

Set the maximum H265 codec level for each platform.
The various mediatek platforms support different levels for decoding,
the level of the codec limits among others the maximum resolution, bit
rate and frame rate for the decoder.

With that you can add:
Reviewed-by: Sebastian Fricke <sebastian.fricke@...labora.com>

Regards,
Sebastian

>Signed-off-by: Yunfei Dong <yunfei.dong@...iatek.com>
>---
> .../vcodec/decoder/mtk_vcodec_dec_stateless.c | 28 +++++++++++++++++++
> 1 file changed, 28 insertions(+)
>
>diff --git a/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_stateless.c b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_stateless.c
>index f4af81bddc58..1fdb21dbacb8 100644
>--- a/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_stateless.c
>+++ b/drivers/media/platform/mediatek/vcodec/decoder/mtk_vcodec_dec_stateless.c
>@@ -147,6 +147,16 @@ static const struct mtk_stateless_control mtk_stateless_controls[] = {
> 		},
> 		.codec_type = V4L2_PIX_FMT_HEVC_SLICE,
> 	},
>+	{
>+		.cfg = {
>+			.id = V4L2_CID_MPEG_VIDEO_HEVC_LEVEL,
>+			.min = V4L2_MPEG_VIDEO_HEVC_LEVEL_1,
>+			.def = V4L2_MPEG_VIDEO_HEVC_LEVEL_4,
>+			.max = V4L2_MPEG_VIDEO_HEVC_LEVEL_4_1,
>+		},
>+		.codec_type = V4L2_PIX_FMT_HEVC_SLICE,
>+	},
>+
> 	{
> 		.cfg = {
> 			.id = V4L2_CID_STATELESS_HEVC_DECODE_MODE,
>@@ -549,6 +559,20 @@ static void mtk_vcodec_dec_fill_h264_level(struct v4l2_ctrl_config *cfg,
> 	};
> }
>
>+static void mtk_vcodec_dec_fill_h265_level(struct v4l2_ctrl_config *cfg,
>+					   struct mtk_vcodec_dec_ctx *ctx)
>+{
>+	switch (ctx->dev->chip_name) {
>+	case MTK_VDEC_MT8188:
>+	case MTK_VDEC_MT8195:
>+		cfg->max = V4L2_MPEG_VIDEO_HEVC_LEVEL_5_1;
>+		break;
>+	default:
>+		cfg->max = V4L2_MPEG_VIDEO_HEVC_LEVEL_4;
>+		break;
>+	};
>+}
>+
> static void mtk_vcodec_dec_reset_controls(struct v4l2_ctrl_config *cfg,
> 					  struct mtk_vcodec_dec_ctx *ctx)
> {
>@@ -557,6 +581,10 @@ static void mtk_vcodec_dec_reset_controls(struct v4l2_ctrl_config *cfg,
> 		mtk_vcodec_dec_fill_h264_level(cfg, ctx);
> 		mtk_v4l2_vdec_dbg(3, ctx, "h264 supported level: %lld %lld", cfg->max, cfg->def);
> 		break;
>+	case V4L2_CID_MPEG_VIDEO_HEVC_LEVEL:
>+		mtk_vcodec_dec_fill_h265_level(cfg, ctx);
>+		mtk_v4l2_vdec_dbg(3, ctx, "h265 supported level: %lld %lld", cfg->max, cfg->def);
>+		break;
> 	default:
> 		break;
> 	};
>-- 
>2.18.0
>