linux-kernel - Re: [PATCH v4,1/2] media: mediatek: vcodec: Force capture queue format to MM21

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Date:   Fri, 17 Mar 2023 11:07:39 -0400
From:   Nícolas F. R. A. Prado 
        <nfraprado@...labora.com>
To:     Yunfei Dong <yunfei.dong@...iatek.com>
Cc:     Chen-Yu Tsai <wenst@...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>,
        Matthias Brugger <matthias.bgg@...il.com>,
        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 v4,1/2] media: mediatek: vcodec: Force capture queue
 format to MM21

On Fri, Mar 17, 2023 at 11:08:32AM +0800, Yunfei Dong wrote:
> While the decoder can produce frames in both MM21 and MT21C formats, only MM21
> is currently supported by userspace tools (like gstreamer and libyuv). In order
> to ensure userspace keeps working after the SCP firmware is updated to support
> both MM21 and MT21C formats, force the MM21 format for the capture queue.
> 
> This is meant as a stopgap solution while dynamic format switching between
> MM21 and MT21C isn't implemented in the driver.
> 
> Fixes: 7501edef6b1f ("media: mediatek: vcodec: Different codec using different capture format")
> Signed-off-by: Yunfei Dong <yunfei.dong@...iatek.com>
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>

Reviewed-by: Nícolas F. R. A. Prado <nfraprado@...labora.com>
Tested-by: Nícolas F. R. A. Prado <nfraprado@...labora.com>


With this patch and the new firmware [1], I was able to run fluster using the
VP8, VP9 and H.264 codecs on both MT8192 and MT8195:

MT8192:
	        VP8: 59/61
	        VP9: 250/303
		     0/6 (HIGH)
	        H.264: 92/135
		       27/69 (JVT-FR-EXT)

MT8195:
	        VP8: 59/61
	        VP9: 276/303
		     0/6 (HIGH)
	        H.264: 95/135
		       27/69 (JVT-FR-EXT)

[1] https://lore.kernel.org/linux-firmware/a43524a089a783f70adbe89b83eeb01fbd405d04.camel@mediatek.com/T/#mb0591267d7921bbfada7c06ee2bda128db554648

Thanks,
Nícolas