linux-kernel - [PATCH v1 15/21] drm/mediatek: add color bypass shadow register function

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Date:   Thu, 20 Aug 2020 14:04:12 +0800
From:   Yongqiang Niu <yongqiang.niu@...iatek.com>
To:     CK Hu <ck.hu@...iatek.com>, Philipp Zabel <p.zabel@...gutronix.de>,
        Rob Herring <robh+dt@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>
CC:     David Airlie <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>,
        Mark Rutland <mark.rutland@....com>,
        <dri-devel@...ts.freedesktop.org>, <devicetree@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-mediatek@...ts.infradead.org>,
        Yongqiang Niu <yongqiang.niu@...iatek.com>
Subject: [PATCH v1 15/21] drm/mediatek: add color bypass shadow register function

add color bypass shadow register function

Signed-off-by: Yongqiang Niu <yongqiang.niu@...iatek.com>
---
 drivers/gpu/drm/mediatek/mtk_disp_color.c | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_disp_color.c b/drivers/gpu/drm/mediatek/mtk_disp_color.c
index 31918fa..83b075a 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_color.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_color.c
@@ -17,6 +17,8 @@
 #define DISP_COLOR_CFG_MAIN			0x0400
 #define DISP_COLOR_START_MT2701			0x0f00
 #define DISP_COLOR_START_MT8173			0x0c00
+#define DISP_COLOR_SHADOW_CTRL			0x0cb0
+#define COLOR_BYPASS_SHADOW				BIT(0)
 #define DISP_COLOR_START(comp)			((comp)->data->color_offset)
 #define DISP_COLOR_WIDTH(comp)			(DISP_COLOR_START(comp) + 0x50)
 #define DISP_COLOR_HEIGHT(comp)			(DISP_COLOR_START(comp) + 0x54)
@@ -26,6 +28,7 @@
 
 struct mtk_disp_color_data {
 	unsigned int color_offset;
+	bool has_shadow;
 };
 
 /**
@@ -63,9 +66,21 @@ static void mtk_color_start(struct mtk_ddp_comp *comp)
 	writel(0x1, comp->regs + DISP_COLOR_START(color));
 }
 
+static void mtk_color_bypass_shadow(struct mtk_ddp_comp *comp)
+{
+	struct mtk_disp_color *color = comp_to_color(comp);
+
+	if (color->data->has_shadow) {
+		mtk_ddp_write_mask(NULL, COLOR_BYPASS_SHADOW, comp,
+				   DISP_COLOR_SHADOW_CTRL,
+				   COLOR_BYPASS_SHADOW);
+	}
+}
+
 static const struct mtk_ddp_comp_funcs mtk_disp_color_funcs = {
 	.config = mtk_color_config,
 	.start = mtk_color_start,
+	.bypass_shadow = mtk_color_bypass_shadow,
 };
 
 static int mtk_disp_color_bind(struct device *dev, struct device *master,
-- 
1.8.1.1.dirty