drm/mediatek: add gmc_bits for ovl private data

This patch add gmc_bits for ovl private data
GMC register was set RDMA ultra and pre-ultra threshold.
10bit GMC register define is different with other SOC, gmc_thrshd_l not
used.

Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
Signed-off-by: CK Hu <ck.hu@mediatek.com>

diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
index 2185175..6491c25 100644 (file)
--- a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
@@ -31,7 +31,9 @@
 #define DISP_REG_OVL_ADDR_MT8173               0x0f40
 #define DISP_REG_OVL_ADDR(ovl, n)              ((ovl)->data->addr + 0x20 * (n))
 
-#define        OVL_RDMA_MEM_GMC        0x40402020
+#define GMC_THRESHOLD_BITS     16
+#define GMC_THRESHOLD_HIGH     ((1 << GMC_THRESHOLD_BITS) / 4)
+#define GMC_THRESHOLD_LOW      ((1 << GMC_THRESHOLD_BITS) / 8)
 
 #define OVL_CON_BYTE_SWAP      BIT(24)
 #define OVL_CON_MTX_YUV_TO_RGB (6 << 16)
@@ -49,6 +51,7 @@
 
 struct mtk_disp_ovl_data {
        unsigned int addr;
+       unsigned int gmc_bits;
        bool fmt_rgb565_is_0;
 };
 
@@ -132,9 +135,23 @@ static unsigned int mtk_ovl_layer_nr(struct mtk_ddp_comp *comp)
 static void mtk_ovl_layer_on(struct mtk_ddp_comp *comp, unsigned int idx)
 {
        unsigned int reg;
+       unsigned int gmc_thrshd_l;
+       unsigned int gmc_thrshd_h;
+       unsigned int gmc_value;
+       struct mtk_disp_ovl *ovl = comp_to_ovl(comp);
 
        writel(0x1, comp->regs + DISP_REG_OVL_RDMA_CTRL(idx));
-       writel(OVL_RDMA_MEM_GMC, comp->regs + DISP_REG_OVL_RDMA_GMC(idx));
+
+       gmc_thrshd_l = GMC_THRESHOLD_LOW >>
+                     (GMC_THRESHOLD_BITS - ovl->data->gmc_bits);
+       gmc_thrshd_h = GMC_THRESHOLD_HIGH >>
+                     (GMC_THRESHOLD_BITS - ovl->data->gmc_bits);
+       if (ovl->data->gmc_bits == 10)
+               gmc_value = gmc_thrshd_h | gmc_thrshd_h << 16;
+       else
+               gmc_value = gmc_thrshd_l | gmc_thrshd_l << 8 |
+                           gmc_thrshd_h << 16 | gmc_thrshd_h << 24;
+       writel(gmc_value, comp->regs + DISP_REG_OVL_RDMA_GMC(idx));
 
        reg = readl(comp->regs + DISP_REG_OVL_SRC_CON);
        reg = reg | BIT(idx);
@@ -316,11 +333,13 @@ static int mtk_disp_ovl_remove(struct platform_device *pdev)
 
 static const struct mtk_disp_ovl_data mt2701_ovl_driver_data = {
        .addr = DISP_REG_OVL_ADDR_MT2701,
+       .gmc_bits = 8,
        .fmt_rgb565_is_0 = false,
 };
 
 static const struct mtk_disp_ovl_data mt8173_ovl_driver_data = {
        .addr = DISP_REG_OVL_ADDR_MT8173,
+       .gmc_bits = 8,
        .fmt_rgb565_is_0 = true,
 };