From: Stu Hsieh <stu.hsieh@mediatek.com>
Date: Thu, 9 Aug 2018 10:15:46 +0800
Subject: drm/mediatek: add function to return RDMA layer number
Git-commit: 98b6d76f957ba80017a3118fe0e33030b4bc017b
Patch-mainline: v4.19-rc2
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166

This patch add function to return RDMA layer number

RDMA always has one layer.

Signed-off-by: Stu Hsieh <stu.hsieh@mediatek.com>
Signed-off-by: CK Hu <ck.hu@mediatek.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
 drivers/gpu/drm/mediatek/mtk_disp_rdma.c |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/drivers/gpu/drm/mediatek/mtk_disp_rdma.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_rdma.c
@@ -192,6 +192,11 @@ static unsigned int rdma_fmt_convert(str
 	}
 }
 
+static unsigned int mtk_rdma_layer_nr(struct mtk_ddp_comp *comp)
+{
+	return 1;
+}
+
 static void mtk_rdma_layer_config(struct mtk_ddp_comp *comp, unsigned int idx,
 				  struct mtk_plane_state *state)
 {
@@ -229,6 +234,7 @@ static const struct mtk_ddp_comp_funcs m
 	.stop = mtk_rdma_stop,
 	.enable_vblank = mtk_rdma_enable_vblank,
 	.disable_vblank = mtk_rdma_disable_vblank,
+	.layer_nr = mtk_rdma_layer_nr,
 	.layer_config = mtk_rdma_layer_config,
 };