[PATCH v4 4/8] drm/mediatek: enable OVL_LAYER_SMI_ID_EN for multi-layer usecase
From: Hsin-Yi Wang <hidden>
Date: 2021-01-29 07:37:51
Also in:
dri-devel, linux-devicetree, linux-mediatek, lkml
Subsystem:
drm drivers, drm drivers for mediatek, the rest · Maintainers:
David Airlie, Simona Vetter, Chun-Kuang Hu, Philipp Zabel, Linus Torvalds
From: Yongqiang Niu <redacted> enable OVL_LAYER_SMI_ID_EN for multi-layer usecase, without this patch, ovl will hang up when more than 1 layer enabled. Signed-off-by: Yongqiang Niu <redacted> Signed-off-by: Hsin-Yi Wang <redacted> --- drivers/gpu/drm/mediatek/mtk_disp_ovl.c | 17 +++++++++++++++++ 1 file changed, 17 insertions(+)
diff --git a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
index da7e38a28759b..961f87f8d4d15 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_ovl.c
+++ b/drivers/gpu/drm/mediatek/mtk_disp_ovl.c@@ -24,6 +24,7 @@ #define DISP_REG_OVL_RST 0x0014 #define DISP_REG_OVL_ROI_SIZE 0x0020 #define DISP_REG_OVL_DATAPATH_CON 0x0024 +#define OVL_LAYER_SMI_ID_EN BIT(0) #define OVL_BGCLR_SEL_IN BIT(2) #define DISP_REG_OVL_ROI_BGCLR 0x0028 #define DISP_REG_OVL_SRC_CON 0x002c
@@ -62,6 +63,7 @@ struct mtk_disp_ovl_data { unsigned int gmc_bits; unsigned int layer_nr; bool fmt_rgb565_is_0; + bool smi_id_en; }; /**
@@ -134,6 +136,13 @@ void mtk_ovl_start(struct device *dev) { struct mtk_disp_ovl *ovl = dev_get_drvdata(dev); + if (ovl->data->smi_id_en) { + unsigned int reg; + + reg = readl(ovl->regs + DISP_REG_OVL_DATAPATH_CON); + reg = reg | OVL_LAYER_SMI_ID_EN; + writel_relaxed(reg, ovl->regs + DISP_REG_OVL_DATAPATH_CON); + } writel_relaxed(0x1, ovl->regs + DISP_REG_OVL_EN); }
@@ -142,6 +151,14 @@ void mtk_ovl_stop(struct device *dev) struct mtk_disp_ovl *ovl = dev_get_drvdata(dev); writel_relaxed(0x0, ovl->regs + DISP_REG_OVL_EN); + if (ovl->data->smi_id_en) { + unsigned int reg; + + reg = readl(ovl->regs + DISP_REG_OVL_DATAPATH_CON); + reg = reg & ~OVL_LAYER_SMI_ID_EN; + writel_relaxed(reg, ovl->regs + DISP_REG_OVL_DATAPATH_CON); + } + } void mtk_ovl_config(struct device *dev, unsigned int w,
--
2.30.0.365.g02bc693789-goog
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