drm/medaitek: add layer_nr for ovl private data

This patch add layer_nr for ovl private data
ovl_2l almost same with with ovl hardware, except the
layer number for ovl_2l is 2 and ovl is 4.
this patch is a preparation for ovl-2l and
ovl share the same driver.

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 6491c2582530f0a45066e33e7b1650c2949faa46..11b20490087a2950af69e96a6b3395642c3d895a 100644 (file)
--- a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
@@ -52,6 +52,7 @@
 struct mtk_disp_ovl_data {
        unsigned int addr;
        unsigned int gmc_bits;
+       unsigned int layer_nr;
        bool fmt_rgb565_is_0;
 };
 
@@ -129,7 +130,9 @@ static void mtk_ovl_config(struct mtk_ddp_comp *comp, unsigned int w,
 
 static unsigned int mtk_ovl_layer_nr(struct mtk_ddp_comp *comp)
 {
-       return 4;
+       struct mtk_disp_ovl *ovl = comp_to_ovl(comp);
+
+       return ovl->data->layer_nr;
 }
 
 static void mtk_ovl_layer_on(struct mtk_ddp_comp *comp, unsigned int idx)
@@ -334,12 +337,14 @@ 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,
+       .layer_nr = 4,
        .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,
+       .layer_nr = 4,
        .fmt_rgb565_is_0 = true,
 };