linux-kernel - Re: [PATCH 1/2] media: mediatek: vcodec: Remove decoder 'dma-ranges' conditon when set dma mask

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Date:   Thu, 23 Mar 2023 09:50:12 +0100
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Yunfei Dong <yunfei.dong@...iatek.com>,
        Chen-Yu Tsai <wenst@...omium.org>,
        Yong Wu <yong.wu@...iatek.org>,
        Nicolas Dufresne <nicolas@...fresne.ca>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Benjamin Gaignard <benjamin.gaignard@...labora.com>,
        Nícolas F . R . A . Prado 
        <nfraprado@...labora.com>
Cc:     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 1/2] media: mediatek: vcodec: Remove decoder 'dma-ranges'
 conditon when set dma mask

Il 23/03/23 09:38, Yunfei Dong ha scritto:
> After commit f1ad5338a4d5("of: Fix "dma-ranges" handling for bus controllers"),
> the dma-ranges is not allowed in decoder dts node. But the driver still need
> to set dma mask, remove "dma-ranges" condition in prob function.
> 
> Signed-off-by: Yunfei Dong <yunfei.dong@...iatek.com>
> ---
> Reference series:
> [1]: v5 of this series is present by Yong Wu.
>       20230307023507.13306-1-yong.wu@...iatek.com
> ---
>   .../mediatek/vcodec/mtk_vcodec_dec_drv.c      | 24 +++++++++++++------
>   1 file changed, 17 insertions(+), 7 deletions(-)
> 
> diff --git a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c
> index bba7b932f4fa..2c3a4c2cdaee 100644
> --- a/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c
> +++ b/drivers/media/platform/mediatek/vcodec/mtk_vcodec_dec_drv.c
> @@ -137,6 +137,20 @@ static int mtk_vcodec_init_dec_resources(struct mtk_vcodec_dev *dev)
>   	return 0;
>   }
>   
> +static int mtk_vcodec_dec_set_dma_mask(struct device *dev)
> +{
> +	int ret = 0;
> +
> +	return !(of_device_is_compatible(dev->of_node, "mediatek,mt8173-vcodec-dec") ||
> +	       of_device_is_compatible(dev->of_node, "mediatek,mt8183-vcodec-dec"));

Like that, you're never reaching the code below...

Anyway, at a first glance, it looked like you were sending the same commit twice,
but then I noticed... so... I would propose to change the commit title(s) to follow
this format:

media: mediatek: vcodec: enc: Set DMA mask only for MT8173 and MT8183

(but then, why mt8173/83 and not the others? this deserves an explanation...)


Regards,
Angelo