linux-kernel - [PATCH v1 20/21] drm/mediatek: add ccorr bypass shadow register function

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Message-ID: <1597903458-8055-21-git-send-email-yongqiang.niu@mediatek.com>
Date:   Thu, 20 Aug 2020 14:04:17 +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 20/21] drm/mediatek: add ccorr bypass shadow register function

add ccorr bypass shadow register function

Signed-off-by: Yongqiang Niu <yongqiang.niu@...iatek.com>
---
 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
index b4a6df5..ff23a94 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
@@ -55,6 +55,8 @@
 #define DISP_CCORR_COEF_2			0x0088
 #define DISP_CCORR_COEF_3			0x008C
 #define DISP_CCORR_COEF_4			0x0090
+#define DISP_CCORR_SHADOW			0x00A0
+#define CCORR_BYPASS_SHADOW				BIT(2)
 
 #define DISP_DITHER_EN				0x0000
 #define DITHER_EN				BIT(0)
@@ -284,6 +286,13 @@ static void mtk_ccorr_ctm_set(struct mtk_ddp_comp *comp,
 		      comp, DISP_CCORR_COEF_4);
 }
 
+static void mtk_ccorr_bypass_shadow(struct mtk_ddp_comp *comp)
+{
+	mtk_ddp_write_mask(NULL, CCORR_BYPASS_SHADOW, comp,
+			   DISP_CCORR_SHADOW,
+			   CCORR_BYPASS_SHADOW);
+}
+
 static void mtk_dither_config(struct mtk_ddp_comp *comp, unsigned int w,
 			      unsigned int h, unsigned int vrefresh,
 			      unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
@@ -381,6 +390,7 @@ static void mtk_postmask_stop(struct mtk_ddp_comp *comp)
 	.start = mtk_ccorr_start,
 	.stop = mtk_ccorr_stop,
 	.ctm_set = mtk_ccorr_ctm_set,
+	.bypass_shadow = mtk_ccorr_bypass_shadow
 };
 
 static const struct mtk_ddp_comp_funcs ddp_dither = {
-- 
1.8.1.1.dirty