1 files changed, 23 insertions, 52 deletions

diff --git a/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c b/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
index 9f20b84d5c0a..7d3fdbb00e7e 100644
--- a/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
+++ b/drivers/gpu/drm/msm/disp/dpu1/dpu_mdss.c
@@ -15,6 +15,10 @@
 #define HW_REV				0x0
 #define HW_INTR_STATUS			0x0010
 
+#define UBWC_STATIC			0x144
+#define UBWC_CTRL_2			0x150
+#define UBWC_PREDICTION_MODE		0x154
+
 /* Max BW defined in KBps */
 #define MAX_BW				6800000
 
@@ -23,17 +27,6 @@ struct dpu_irq_controller {
 	struct irq_domain *domain;
 };
 
-struct dpu_hw_cfg {
-	u32 val;
-	u32 offset;
-};
-
-struct dpu_mdss_hw_init_handler {
-	u32 hw_rev;
-	u32 hw_reg_count;
-	struct dpu_hw_cfg* hw_cfg;
-};
-
 struct dpu_mdss {
 	struct msm_mdss base;
 	void __iomem *mmio;
@@ -43,44 +36,6 @@ struct dpu_mdss {
 	u32 num_paths;
 };
 
-static struct dpu_hw_cfg hw_cfg[] = {
-    {
-	/* UBWC global settings */
-	.val = 0x1E,
-	.offset = 0x144,
-    }
-};
-
-static struct dpu_mdss_hw_init_handler cfg_handler[] = {
-    { .hw_rev = DPU_HW_VER_620,
-      .hw_reg_count = ARRAY_SIZE(hw_cfg),
-      .hw_cfg = hw_cfg
-    },
-};
-
-static void dpu_mdss_hw_init(struct dpu_mdss *dpu_mdss, u32 hw_rev)
-{
-	int i;
-	u32 count = 0;
-	struct dpu_hw_cfg *hw_cfg = NULL;
-
-	for (i = 0; i < ARRAY_SIZE(cfg_handler); i++) {
-		if (cfg_handler[i].hw_rev == hw_rev) {
-			hw_cfg = cfg_handler[i].hw_cfg;
-			count = cfg_handler[i].hw_reg_count;
-			break;
-	    }
-	}
-
-	for (i = 0; i < count; i++ ) {
-		writel_relaxed(hw_cfg->val,
-			dpu_mdss->mmio + hw_cfg->offset);
-		hw_cfg++;
-	}
-
-    return;
-}
-
 static int dpu_mdss_parse_data_bus_icc_path(struct drm_device *dev,
 						struct dpu_mdss *dpu_mdss)
 {
@@ -223,7 +178,6 @@ static int dpu_mdss_enable(struct msm_mdss *mdss)
 	struct dpu_mdss *dpu_mdss = to_dpu_mdss(mdss);
 	struct dss_module_power *mp = &dpu_mdss->mp;
 	int ret;
-	u32 mdss_rev;
 
 	dpu_mdss_icc_request_bw(mdss);
 
@@ -233,8 +187,25 @@ static int dpu_mdss_enable(struct msm_mdss *mdss)
 		return ret;
 	}
 
-	mdss_rev = readl_relaxed(dpu_mdss->mmio + HW_REV);
-	dpu_mdss_hw_init(dpu_mdss, mdss_rev);
+	/*
+	 * ubwc config is part of the "mdss" region which is not accessible
+	 * from the rest of the driver. hardcode known configurations here
+	 */
+	switch (readl_relaxed(dpu_mdss->mmio + HW_REV)) {
+	case DPU_HW_VER_500:
+	case DPU_HW_VER_501:
+		writel_relaxed(0x420, dpu_mdss->mmio + UBWC_STATIC);
+		break;
+	case DPU_HW_VER_600:
+		/* TODO: 0x102e for LP_DDR4 */
+		writel_relaxed(0x103e, dpu_mdss->mmio + UBWC_STATIC);
+		writel_relaxed(2, dpu_mdss->mmio + UBWC_CTRL_2);
+		writel_relaxed(1, dpu_mdss->mmio + UBWC_PREDICTION_MODE);
+		break;
+	case DPU_HW_VER_620:
+		writel_relaxed(0x1e, dpu_mdss->mmio + UBWC_STATIC);
+		break;
+	}
 
 	return ret;
 }