linux-kernel - Re: [PATCH v1 3/6] soc: mediatek: mmsys: add support for MT8195 VPPSYS

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Date:   Tue, 4 Oct 2022 14:17:33 +0200
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Moudy Ho <moudy.ho@...iatek.com>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        Chun-Kuang Hu <chunkuang.hu@...nel.org>
Cc:     linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org,
        Project_Global_Chrome_Upstream_Group@...iatek.com,
        "Roy-CW.Yeh" <roy-cw.yeh@...iatek.com>
Subject: Re: [PATCH v1 3/6] soc: mediatek: mmsys: add support for MT8195
 VPPSYS

Il 04/10/22 11:33, Moudy Ho ha scritto:
> From: "Roy-CW.Yeh" <roy-cw.yeh@...iatek.com>
> 
> Add MT8195 VPPSYS0 and VPPSYS1 driver data.
> 
> Signed-off-by: Roy-CW.Yeh <roy-cw.yeh@...iatek.com>
> ---
>   drivers/soc/mediatek/mtk-mmsys.c | 20 +++++++++++++++++++-
>   drivers/soc/mediatek/mtk-mmsys.h |  1 +
>   2 files changed, 20 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/soc/mediatek/mtk-mmsys.c b/drivers/soc/mediatek/mtk-mmsys.c
> index d2c7a87aab87..c4d15f99f853 100644
> --- a/drivers/soc/mediatek/mtk-mmsys.c
> +++ b/drivers/soc/mediatek/mtk-mmsys.c
> @@ -149,11 +149,25 @@ static const struct mtk_mmsys_driver_data mt8195_vdosys1_driver_data = {
>   	.clk_driver = "clk-mt8195-vdo1",
>   };
>   
> +static const struct mtk_mmsys_driver_data mt8195_vppsys0_driver_data = {
> +	.io_start = 0x14000000,
> +	.clk_driver = "clk-mt8195-vpp0",
> +	.is_copies = true,
> +};
> +
> +static const struct mtk_mmsys_driver_data mt8195_vppsys1_driver_data = {
> +	.io_start = 0x14f00000,
> +	.clk_driver = "clk-mt8195-vpp1",
> +	.is_copies = true,
> +};
> +
>   static const struct mtk_mmsys_match_data mt8195_mmsys_match_data = {
> -	.num_drv_data = 2,
> +	.num_drv_data = 4,

After a long discussion, it was chosen to not use the io_start way, but to change
the devicetree compatible....

Check this series, and rebase on top of it:
https://patchwork.kernel.org/project/linux-mediatek/list/?series=681097

Cheers,
Angelo

>   	.drv_data = {
>   		&mt8195_vdosys0_driver_data,
>   		&mt8195_vdosys1_driver_data,
> +		&mt8195_vppsys0_driver_data,
> +		&mt8195_vppsys1_driver_data,
>   	},
>   };
>   
> @@ -360,6 +374,9 @@ static int mtk_mmsys_probe(struct platform_device *pdev)
>   	if (IS_ERR(clks))
>   		return PTR_ERR(clks);
>   
> +	if (mmsys->data->is_copies)

I don't get what "is_copies" means, sorry. I'm sure that there's a better name
for this one.

> +		goto out_probe_done;
> +
>   	drm = platform_device_register_data(&pdev->dev, "mediatek-drm",
>   					    PLATFORM_DEVID_AUTO, NULL, 0);
>   	if (IS_ERR(drm)) {

Regards,
Angelo