[PATCH v2 13/15] drm: sprd: do not access IOMMU registers

[Otto Pflüger]

Changing the IOMMU registers results in conflicts with the sprd_iommu
driver. Remove all references to IOMMU registers in the graphics driver.

Signed-off-by: Otto Pflüger <otto.pflue...@abscue.de>
---
 drivers/gpu/drm/sprd/sprd_dpu.c | 14 --------------
 1 file changed, 14 deletions(-)

diff --git a/drivers/gpu/drm/sprd/sprd_dpu.c b/drivers/gpu/drm/sprd/sprd_dpu.c
index 
b946d015133db44d2d3d0b18803ed887b2b7ae2e..acf28de3fd08edaad03f01104f3e6cc7c243123c
 100644
--- a/drivers/gpu/drm/sprd/sprd_dpu.c
+++ b/drivers/gpu/drm/sprd/sprd_dpu.c
@@ -55,14 +55,6 @@
 #define REG_DPI_H_TIMING       0x1F4
 #define REG_DPI_V_TIMING       0x1F8
 
-/* MMU control registers */
-#define REG_MMU_EN                     0x800
-#define REG_MMU_VPN_RANGE              0x80C
-#define REG_MMU_PPN1                   0x83C
-#define REG_MMU_RANGE1                 0x840
-#define REG_MMU_PPN2                   0x844
-#define REG_MMU_RANGE2                 0x848
-
 /* Global control bits */
 #define BIT_DPU_RUN                    BIT(0)
 #define BIT_DPU_STOP                   BIT(1)
@@ -410,12 +402,6 @@ static void sprd_dpu_init(struct sprd_dpu *dpu)
        u32 dpu_version = readl(ctx->base + REG_DPU_VERSION);
 
        writel(0x00, ctx->base + REG_BG_COLOR);
-       writel(0x00, ctx->base + REG_MMU_EN);
-       writel(0x00, ctx->base + REG_MMU_PPN1);
-       writel(0xffff, ctx->base + REG_MMU_RANGE1);
-       writel(0x00, ctx->base + REG_MMU_PPN2);
-       writel(0xffff, ctx->base + REG_MMU_RANGE2);
-       writel(0x1ffff, ctx->base + REG_MMU_VPN_RANGE);
 
        if (ctx->if_type == SPRD_DPU_IF_DPI) {
                /* use dpi as interface */

-- 
2.50.0