Re: [PATCH 2/5] soc: mediatek: change compatible name for mt8195

[Matthias Brugger <matthias.bgg@gmail.com>]

On 14/09/2022 20:23, Jason-JH.Lin wrote:
> In mt8195, vdosys0 and vdosys1 are 2 different function blocks
> for mediatek-drm, so using 2 compatible instead of identifying
> multiple mmsys by io_start.
> 
> Fixes: b804923b7ccb ("soc: mediatek: add mtk-mmsys support for mt8195 vdosys0")
> Signed-off-by: Jason-JH.Lin <jason-jh.lin@mediatek.com>

 From what I have seen we can just revert the commit. No fixes tag needed, it 
does not fix any (runtime) bug.

Regards,
Matthias

> ---
>   drivers/soc/mediatek/mtk-mmsys.c | 141 +++++--------------------------
>   drivers/soc/mediatek/mtk-mmsys.h |   6 --
>   2 files changed, 21 insertions(+), 126 deletions(-)
> 
> diff --git a/drivers/soc/mediatek/mtk-mmsys.c b/drivers/soc/mediatek/mtk-mmsys.c
> index 06d8e83a2cb5..e1c653f3abc0 100644
> --- a/drivers/soc/mediatek/mtk-mmsys.c
> +++ b/drivers/soc/mediatek/mtk-mmsys.c
> @@ -26,61 +26,26 @@ static const struct mtk_mmsys_driver_data mt2701_mmsys_driver_data = {
>   	.num_routes = ARRAY_SIZE(mmsys_default_routing_table),
>   };
>   
> -static const struct mtk_mmsys_match_data mt2701_mmsys_match_data = {
> -	.num_drv_data = 1,
> -	.drv_data = {
> -		&mt2701_mmsys_driver_data,
> -	},
> -};
> -
>   static const struct mtk_mmsys_driver_data mt2712_mmsys_driver_data = {
>   	.clk_driver = "clk-mt2712-mm",
>   	.routes = mmsys_default_routing_table,
>   	.num_routes = ARRAY_SIZE(mmsys_default_routing_table),
>   };
>   
> -static const struct mtk_mmsys_match_data mt2712_mmsys_match_data = {
> -	.num_drv_data = 1,
> -	.drv_data = {
> -		&mt2712_mmsys_driver_data,
> -	},
> -};
> -
>   static const struct mtk_mmsys_driver_data mt6779_mmsys_driver_data = {
>   	.clk_driver = "clk-mt6779-mm",
>   };
>   
> -static const struct mtk_mmsys_match_data mt6779_mmsys_match_data = {
> -	.num_drv_data = 1,
> -	.drv_data = {
> -		&mt6779_mmsys_driver_data,
> -	},
> -};
> -
>   static const struct mtk_mmsys_driver_data mt6797_mmsys_driver_data = {
>   	.clk_driver = "clk-mt6797-mm",
>   };
>   
> -static const struct mtk_mmsys_match_data mt6797_mmsys_match_data = {
> -	.num_drv_data = 1,
> -	.drv_data = {
> -		&mt6797_mmsys_driver_data,
> -	},
> -};
> -
>   static const struct mtk_mmsys_driver_data mt8167_mmsys_driver_data = {
>   	.clk_driver = "clk-mt8167-mm",
>   	.routes = mt8167_mmsys_routing_table,
>   	.num_routes = ARRAY_SIZE(mt8167_mmsys_routing_table),
>   };
>   
> -static const struct mtk_mmsys_match_data mt8167_mmsys_match_data = {
> -	.num_drv_data = 1,
> -	.drv_data = {
> -		&mt8167_mmsys_driver_data,
> -	},
> -};
> -
>   static const struct mtk_mmsys_driver_data mt8173_mmsys_driver_data = {
>   	.clk_driver = "clk-mt8173-mm",
>   	.routes = mmsys_default_routing_table,
> @@ -88,13 +53,6 @@ static const struct mtk_mmsys_driver_data mt8173_mmsys_driver_data = {
>   	.sw0_rst_offset = MT8183_MMSYS_SW0_RST_B,
>   };
>   
> -static const struct mtk_mmsys_match_data mt8173_mmsys_match_data = {
> -	.num_drv_data = 1,
> -	.drv_data = {
> -		&mt8173_mmsys_driver_data,
> -	},
> -};
> -
>   static const struct mtk_mmsys_driver_data mt8183_mmsys_driver_data = {
>   	.clk_driver = "clk-mt8183-mm",
>   	.routes = mmsys_mt8183_routing_table,
> @@ -102,13 +60,6 @@ static const struct mtk_mmsys_driver_data mt8183_mmsys_driver_data = {
>   	.sw0_rst_offset = MT8183_MMSYS_SW0_RST_B,
>   };
>   
> -static const struct mtk_mmsys_match_data mt8183_mmsys_match_data = {
> -	.num_drv_data = 1,
> -	.drv_data = {
> -		&mt8183_mmsys_driver_data,
> -	},
> -};
> -
>   static const struct mtk_mmsys_driver_data mt8186_mmsys_driver_data = {
>   	.clk_driver = "clk-mt8186-mm",
>   	.routes = mmsys_mt8186_routing_table,
> @@ -116,13 +67,6 @@ static const struct mtk_mmsys_driver_data mt8186_mmsys_driver_data = {
>   	.sw0_rst_offset = MT8186_MMSYS_SW0_RST_B,
>   };
>   
> -static const struct mtk_mmsys_match_data mt8186_mmsys_match_data = {
> -	.num_drv_data = 1,
> -	.drv_data = {
> -		&mt8186_mmsys_driver_data,
> -	},
> -};
> -
>   static const struct mtk_mmsys_driver_data mt8192_mmsys_driver_data = {
>   	.clk_driver = "clk-mt8192-mm",
>   	.routes = mmsys_mt8192_routing_table,
> @@ -130,66 +74,29 @@ static const struct mtk_mmsys_driver_data mt8192_mmsys_driver_data = {
>   	.sw0_rst_offset = MT8186_MMSYS_SW0_RST_B,
>   };
>   
> -static const struct mtk_mmsys_match_data mt8192_mmsys_match_data = {
> -	.num_drv_data = 1,
> -	.drv_data = {
> -		&mt8192_mmsys_driver_data,
> -	},
> -};
> -
>   static const struct mtk_mmsys_driver_data mt8195_vdosys0_driver_data = {
> -	.io_start = 0x1c01a000,
>   	.clk_driver = "clk-mt8195-vdo0",
>   	.routes = mmsys_mt8195_routing_table,
>   	.num_routes = ARRAY_SIZE(mmsys_mt8195_routing_table),
>   };
>   
>   static const struct mtk_mmsys_driver_data mt8195_vdosys1_driver_data = {
> -	.io_start = 0x1c100000,
>   	.clk_driver = "clk-mt8195-vdo1",
>   };
>   
> -static const struct mtk_mmsys_match_data mt8195_mmsys_match_data = {
> -	.num_drv_data = 2,
> -	.drv_data = {
> -		&mt8195_vdosys0_driver_data,
> -		&mt8195_vdosys1_driver_data,
> -	},
> -};
> -
>   static const struct mtk_mmsys_driver_data mt8365_mmsys_driver_data = {
>   	.clk_driver = "clk-mt8365-mm",
>   	.routes = mt8365_mmsys_routing_table,
>   	.num_routes = ARRAY_SIZE(mt8365_mmsys_routing_table),
>   };
>   
> -static const struct mtk_mmsys_match_data mt8365_mmsys_match_data = {
> -	.num_drv_data = 1,
> -	.drv_data = {
> -		&mt8365_mmsys_driver_data,
> -	},
> -};
> -
>   struct mtk_mmsys {
>   	void __iomem *regs;
>   	const struct mtk_mmsys_driver_data *data;
>   	spinlock_t lock; /* protects mmsys_sw_rst_b reg */
>   	struct reset_controller_dev rcdev;
> -	phys_addr_t io_start;
>   };
>   
> -static int mtk_mmsys_find_match_drvdata(struct mtk_mmsys *mmsys,
> -					const struct mtk_mmsys_match_data *match)
> -{
> -	int i;
> -
> -	for (i = 0; i < match->num_drv_data; i++)
> -		if (mmsys->io_start == match->drv_data[i]->io_start)
> -			return i;
> -
> -	return -EINVAL;
> -}
> -
>   void mtk_mmsys_ddp_connect(struct device *dev,
>   			   enum mtk_ddp_comp_id cur,
>   			   enum mtk_ddp_comp_id next)
> @@ -284,7 +191,6 @@ static int mtk_mmsys_probe(struct platform_device *pdev)
>   	struct device *dev = &pdev->dev;
>   	struct platform_device *clks;
>   	struct platform_device *drm;
> -	const struct mtk_mmsys_match_data *match_data;
>   	struct mtk_mmsys *mmsys;
>   	struct resource *res;
>   	int ret;
> @@ -317,20 +223,11 @@ static int mtk_mmsys_probe(struct platform_device *pdev)
>   		dev_err(dev, "Couldn't get mmsys resource\n");
>   		return -EINVAL;
>   	}
> -	mmsys->io_start = res->start;
> -
> -	match_data = of_device_get_match_data(dev);
> -	if (match_data->num_drv_data > 1) {
> -		/* This SoC has multiple mmsys channels */
> -		ret = mtk_mmsys_find_match_drvdata(mmsys, match_data);
> -		if (ret < 0) {
> -			dev_err(dev, "Couldn't get match driver data\n");
> -			return ret;
> -		}
> -		mmsys->data = match_data->drv_data[ret];
> -	} else {
> -		dev_dbg(dev, "Using single mmsys channel\n");
> -		mmsys->data = match_data->drv_data[0];
> +
> +	mmsys->data = of_device_get_match_data(&pdev->dev);
> +	if (!mmsys->data) {
> +		dev_err(dev, "Couldn't get match driver data\n");
> +		return -EINVAL;
>   	}
>   
>   	platform_set_drvdata(pdev, mmsys);
> @@ -353,47 +250,51 @@ static int mtk_mmsys_probe(struct platform_device *pdev)
>   static const struct of_device_id of_match_mtk_mmsys[] = {
>   	{
>   		.compatible = "mediatek,mt2701-mmsys",
> -		.data = &mt2701_mmsys_match_data,
> +		.data = &mt2701_mmsys_driver_data,
>   	},
>   	{
>   		.compatible = "mediatek,mt2712-mmsys",
> -		.data = &mt2712_mmsys_match_data,
> +		.data = &mt2712_mmsys_driver_data,
>   	},
>   	{
>   		.compatible = "mediatek,mt6779-mmsys",
> -		.data = &mt6779_mmsys_match_data,
> +		.data = &mt6779_mmsys_driver_data,
>   	},
>   	{
>   		.compatible = "mediatek,mt6797-mmsys",
> -		.data = &mt6797_mmsys_match_data,
> +		.data = &mt6797_mmsys_driver_data,
>   	},
>   	{
>   		.compatible = "mediatek,mt8167-mmsys",
> -		.data = &mt8167_mmsys_match_data,
> +		.data = &mt8167_mmsys_driver_data,
>   	},
>   	{
>   		.compatible = "mediatek,mt8173-mmsys",
> -		.data = &mt8173_mmsys_match_data,
> +		.data = &mt8173_mmsys_driver_data,
>   	},
>   	{
>   		.compatible = "mediatek,mt8183-mmsys",
> -		.data = &mt8183_mmsys_match_data,
> +		.data = &mt8183_mmsys_driver_data,
>   	},
>   	{
>   		.compatible = "mediatek,mt8186-mmsys",
> -		.data = &mt8186_mmsys_match_data,
> +		.data = &mt8186_mmsys_driver_data,
>   	},
>   	{
>   		.compatible = "mediatek,mt8192-mmsys",
> -		.data = &mt8192_mmsys_match_data,
> +		.data = &mt8192_mmsys_driver_data,
> +	},
> +	{
> +		.compatible = "mediatek,mt8195-vdosys0",
> +		.data = &mt8195_vdosys0_driver_data,
>   	},
>   	{
> -		.compatible = "mediatek,mt8195-mmsys",
> -		.data = &mt8195_mmsys_match_data,
> +		.compatible = "mediatek,mt8195-vdosys1",
> +		.data = &mt8195_vdosys1_driver_data,
>   	},
>   	{
>   		.compatible = "mediatek,mt8365-mmsys",
> -		.data = &mt8365_mmsys_match_data,
> +		.data = &mt8365_mmsys_driver_data,
>   	},
>   	{ }
>   };
> diff --git a/drivers/soc/mediatek/mtk-mmsys.h b/drivers/soc/mediatek/mtk-mmsys.h
> index f01ba206481d..77f37f8c715b 100644
> --- a/drivers/soc/mediatek/mtk-mmsys.h
> +++ b/drivers/soc/mediatek/mtk-mmsys.h
> @@ -87,18 +87,12 @@ struct mtk_mmsys_routes {
>   };
>   
>   struct mtk_mmsys_driver_data {
> -	const resource_size_t io_start;
>   	const char *clk_driver;
>   	const struct mtk_mmsys_routes *routes;
>   	const unsigned int num_routes;
>   	const u16 sw0_rst_offset;
>   };
>   
> -struct mtk_mmsys_match_data {
> -	unsigned short num_drv_data;
> -	const struct mtk_mmsys_driver_data *drv_data[];
> -};
> -
>   /*
>    * Routes in mt8173, mt2701, mt2712 are different. That means
>    * in the same register address, it controls different input/output