[PATCH v1 18/21] drm/mediatek: add dither bypass shadow register function

[Yongqiang Niu]

add dither bypass shadow register function

Signed-off-by: Yongqiang Niu <yongqiang.niu at mediatek.com>
---
 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c | 11 +++++++++++
 1 file changed, 11 insertions(+)

diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
index 0c81253..315bd3a 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
@@ -23,6 +23,9 @@
 #define DISP_OD_INTSTA				0x000c
 #define DISP_OD_CFG				0x0020
 #define DISP_OD_SIZE				0x0030
+
+#define DITHER_REG(idx)				(0x100 + (idx) * 4)
+#define DITHER_BYPASS_SHADOW				BIT(0)
 #define DISP_DITHER_5				0x0114
 #define DISP_DITHER_7				0x011c
 #define DISP_DITHER_15				0x013c
@@ -291,6 +294,13 @@ static void mtk_dither_stop(struct mtk_ddp_comp *comp)
 	writel_relaxed(0x0, comp->regs + DISP_DITHER_EN);
 }
 
+static void mtk_dither_bypass_shadow(struct mtk_ddp_comp *comp)
+{
+	mtk_ddp_write_mask(NULL, DITHER_BYPASS_SHADOW, comp,
+			   DITHER_REG(0),
+			   DITHER_BYPASS_SHADOW);
+}
+
 static void mtk_gamma_config(struct mtk_ddp_comp *comp, unsigned int w,
 			     unsigned int h, unsigned int vrefresh,
 			     unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
@@ -368,6 +378,7 @@ static void mtk_postmask_stop(struct mtk_ddp_comp *comp)
 	.config = mtk_dither_config,
 	.start = mtk_dither_start,
 	.stop = mtk_dither_stop,
+	.bypass_shadow = mtk_dither_bypass_shadow,
 };
 
 static const struct mtk_ddp_comp_funcs ddp_gamma = {
-- 
1.8.1.1.dirty