Commit 9a87005e authored by Yong Wu's avatar Yong Wu Committed by Joerg Roedel
Browse files

iommu/mediatek: Add a flag DCM_DISABLE 



In the infra iommu, we should disable DCM. add a new flag for this.

Signed-off-by: default avatarYong Wu <yong.wu@mediatek.com>
Reviewed-by: default avatarAngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: default avatarMatthias Brugger <matthias.bgg@gmail.com>
Link: https://lore.kernel.org/r/20220503071427.2285-12-yong.wu@mediatek.com


Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent 129a3b88

drivers/iommu/mtk_iommu.c

+8 −1
Original line number Diff line number Diff line
@@ -51,6 +51,8 @@ 
#define F_MMU_STANDARD_AXI_MODE_MASK		(BIT(3) | BIT(19))



#define REG_MMU_DCM_DIS				0x050

#define F_MMU_DCM				BIT(8)



#define REG_MMU_WR_LEN_CTRL			0x054

#define F_MMU_WR_THROT_DIS_MASK			(BIT(5) | BIT(21))
@@ -119,6 +121,7 @@ 
#define HAS_LEGACY_IVRP_PADDR		BIT(7)

#define IOVA_34_EN			BIT(8)

#define SHARE_PGTABLE			BIT(9) /* 2 HW share pgtable */

#define DCM_DISABLE			BIT(10)



#define MTK_IOMMU_HAS_FLAG(pdata, _x) \

		((((pdata)->flags) & (_x)) == (_x))
@@ -765,7 +768,11 @@ static int mtk_iommu_hw_init(const struct mtk_iommu_data *data) 
		regval = F_MMU_VLD_PA_RNG(7, 4);

		writel_relaxed(regval, data->base + REG_MMU_VLD_PA_RNG);

	}

	if (MTK_IOMMU_HAS_FLAG(data->plat_data, DCM_DISABLE))

		writel_relaxed(F_MMU_DCM, data->base + REG_MMU_DCM_DIS);

	else

		writel_relaxed(0, data->base + REG_MMU_DCM_DIS);



	if (MTK_IOMMU_HAS_FLAG(data->plat_data, WR_THROT_EN)) {

		/* write command throttling mode */

		regval = readl_relaxed(data->base + REG_MMU_WR_LEN_CTRL);