linux-kernel - Re: [PATCH v2,2/9] media: mtk-jpegenc: Add MT8195 JPEG venc driver

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Date:   Tue, 6 Jul 2021 19:00:25 +0800
From:   Tzung-Bi Shih <tzungbi@...gle.com>
To:     "kyrie.wu" <kyrie.wu@...iatek.com>
Cc:     Hans Verkuil <hverkuil-cisco@...all.nl>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Bin Liu <bin.liu@...iatek.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Tzung-Bi Shih <tzungbi@...omium.org>,
        Project_Global_Chrome_Upstream_Group@...iatek.com,
        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,
        Tomasz Figa <tfiga@...omium.org>, xia.jiang@...iatek.com,
        maoguang.meng@...iatek.com, srv_heupstream@...iatek.com
Subject: Re: [PATCH v2,2/9] media: mtk-jpegenc: Add MT8195 JPEG venc driver

On Wed, Jun 30, 2021 at 3:32 PM kyrie.wu <kyrie.wu@...iatek.com> wrote:
> Add MT8195 JPEG venc driver's compatible and device private data.
> compatible = "mediatek,mt8195-jpgenc": this node would only register
> jpgenc device node;
> compatible = "mediatek,mt8195-jpgenc0": HW0 node, this node would not
> register jpgenc device node, but register irq, init clk and power,
> remmap register base and do other resource options;
> compatible = "mediatek,mt8195-jpgenc1": HW1 node, just like HW0 node;
The commit message is not easy to read.  Please rephrase the sentences.

What does "venc" stand for?  I believe it is a copy-n-paste typo.

The commit title "support MT8195 JPEG encoder" looks better to me.

> -static const struct mtk_jpeg_variant mtk_jpeg_drvdata = {
> +static const struct mtk_jpeg_variant mtk_jpegenc_drvdata = {
Why remove mtk_jpeg_drvdata?

> -       .irq_handler = mtk_jpeg_enc_irq,
Why remove the IRQ handler?

> @@ -1548,10 +1551,6 @@ static const struct of_device_id mtk_jpeg_match[] = {
>                 .compatible = "mediatek,mt2701-jpgdec",
>                 .data = &mt8173_jpeg_drvdata,
>         },
> -       {
> -               .compatible = "mediatek,mtk-jpgenc",
> -               .data = &mtk_jpeg_drvdata,
> -       },
Why remove "mediatek,mtk-jpgenc"?

> +#if defined(CONFIG_OF)
> +static const struct of_device_id mtk_jpegenc_hw_ids[] = {
> +       {
> +               .compatible = "mediatek,mt8195-jpgenc0",
> +       },
> +       {       .compatible = "mediatek,mt8195-jpgenc1",
> +       },
> +       {},
> +};
> +MODULE_DEVICE_TABLE(of, mtk_jpegenc_hw_ids);
> +#endif
Would expect somewhere to reference mtk_jpegenc_hw_ids but failed to find it.