[PATCH v4 2/8] drm/mediatek: add component POSTMASK

[Hsin-Yi Wang <hsinyi@chromium.org>]

From: Yongqiang Niu <yongqiang.niu@mediatek.com>

This patch add component POSTMASK,

Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
Signed-off-by: Hsin-Yi Wang <hsinyi@chromium.org>
---
 drivers/gpu/drm/mediatek/Makefile            |   1 +
 drivers/gpu/drm/mediatek/mtk_disp_drv.h      |   8 +
 drivers/gpu/drm/mediatek/mtk_disp_postmask.c | 161 +++++++++++++++++++
 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c  |  11 ++
 drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h  |   1 +
 drivers/gpu/drm/mediatek/mtk_drm_drv.c       |   4 +-
 drivers/gpu/drm/mediatek/mtk_drm_drv.h       |   1 +
 7 files changed, 186 insertions(+), 1 deletion(-)
 create mode 100644 drivers/gpu/drm/mediatek/mtk_disp_postmask.c

diff --git a/drivers/gpu/drm/mediatek/Makefile b/drivers/gpu/drm/mediatek/Makefile
index b64674b944860..13a0eafabf9c0 100644
--- a/drivers/gpu/drm/mediatek/Makefile
+++ b/drivers/gpu/drm/mediatek/Makefile
@@ -3,6 +3,7 @@
 mediatek-drm-y := mtk_disp_color.o \
 		  mtk_disp_gamma.o \
 		  mtk_disp_ovl.o \
+		  mtk_disp_postmask.o \
 		  mtk_disp_rdma.o \
 		  mtk_drm_crtc.o \
 		  mtk_drm_ddp_comp.o \
diff --git a/drivers/gpu/drm/mediatek/mtk_disp_drv.h b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
index 02191010699f8..d74e85db3fcdf 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
+++ b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
@@ -37,6 +37,14 @@ void mtk_gamma_set_common(void __iomem *regs, struct drm_crtc_state *state);
 void mtk_gamma_start(struct device *dev);
 void mtk_gamma_stop(struct device *dev);
 
+int mtk_postmask_clk_enable(struct device *dev);
+void mtk_postmask_clk_disable(struct device *dev);
+void mtk_postmask_config(struct device *dev, unsigned int w,
+                      unsigned int h, unsigned int vrefresh,
+                      unsigned int bpc, struct cmdq_pkt *cmdq_pkt);
+void mtk_postmask_start(struct device *dev);
+void mtk_postmask_stop(struct device *dev);
+
 void mtk_ovl_bgclr_in_on(struct device *dev);
 void mtk_ovl_bgclr_in_off(struct device *dev);
 void mtk_ovl_bypass_shadow(struct device *dev);
diff --git a/drivers/gpu/drm/mediatek/mtk_disp_postmask.c b/drivers/gpu/drm/mediatek/mtk_disp_postmask.c
new file mode 100644
index 0000000000000..d640cef9c15a4
--- /dev/null
+++ b/drivers/gpu/drm/mediatek/mtk_disp_postmask.c
@@ -0,0 +1,161 @@
+/*
+ * SPDX-License-Identifier:
+ *
+ * Copyright (c) 2020 MediaTek Inc.
+ */
+
+#include <linux/clk.h>
+#include <linux/component.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/of_irq.h>
+#include <linux/platform_device.h>
+#include <linux/soc/mediatek/mtk-cmdq.h>
+
+#include "mtk_disp_drv.h"
+#include "mtk_drm_crtc.h"
+#include "mtk_drm_ddp_comp.h"
+
+#define DISP_POSTMASK_EN			0x0000
+#define POSTMASK_EN				BIT(0)
+#define DISP_POSTMASK_CFG			0x0020
+#define POSTMASK_RELAY_MODE			BIT(0)
+#define DISP_POSTMASK_SIZE			0x0030
+
+struct mtk_disp_postmask_data {
+	u32 reserved;
+};
+
+/**
+ * struct mtk_disp_postmask - DISP_postmask driver structure
+ * @ddp_comp - structure containing type enum and hardware resources
+ * @crtc - associated crtc to report irq events to
+ */
+struct mtk_disp_postmask {
+	struct clk *clk;
+	void __iomem *regs;
+	struct cmdq_client_reg cmdq_reg;
+	const struct mtk_disp_postmask_data *data;
+};
+
+int mtk_postmask_clk_enable(struct device *dev)
+{
+	struct mtk_disp_postmask *postmask = dev_get_drvdata(dev);
+
+	return clk_prepare_enable(postmask->clk);
+}
+
+void mtk_postmask_clk_disable(struct device *dev)
+{
+	struct mtk_disp_postmask *postmask = dev_get_drvdata(dev);
+
+	clk_disable_unprepare(postmask->clk);
+}
+
+void mtk_postmask_config(struct device *dev, unsigned int w,
+			 unsigned int h, unsigned int vrefresh,
+			 unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
+{
+	struct mtk_disp_postmask *postmask = dev_get_drvdata(dev);
+
+	mtk_ddp_write(cmdq_pkt, w << 16 | h, &postmask->cmdq_reg, postmask->regs,
+		      DISP_POSTMASK_SIZE);
+	mtk_ddp_write(cmdq_pkt, POSTMASK_RELAY_MODE, &postmask->cmdq_reg,
+		      postmask->regs, DISP_POSTMASK_CFG);
+}
+
+void mtk_postmask_start(struct device *dev)
+{
+	struct mtk_disp_postmask *postmask = dev_get_drvdata(dev);
+
+	writel(POSTMASK_EN, postmask->regs + DISP_POSTMASK_EN);
+}
+
+void mtk_postmask_stop(struct device *dev)
+{
+	struct mtk_disp_postmask *postmask = dev_get_drvdata(dev);
+
+	writel_relaxed(0x0, postmask->regs + DISP_POSTMASK_EN);
+}
+
+static int mtk_disp_postmask_bind(struct device *dev, struct device *master, void *data)
+{
+	return 0;
+}
+
+static void mtk_disp_postmask_unbind(struct device *dev, struct device *master,
+				  void *data)
+{
+}
+
+static const struct component_ops mtk_disp_postmask_component_ops = {
+	.bind	= mtk_disp_postmask_bind,
+	.unbind = mtk_disp_postmask_unbind,
+};
+
+static int mtk_disp_postmask_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct mtk_disp_postmask *priv;
+	struct resource *res;
+	int ret;
+
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	priv->clk = devm_clk_get(dev, NULL);
+	if (IS_ERR(priv->clk)) {
+		dev_err(dev, "failed to get postmask clk\n");
+		return PTR_ERR(priv->clk);
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	priv->regs = devm_ioremap_resource(dev, res);
+	if (IS_ERR(priv->regs)) {
+		dev_err(dev, "failed to ioremap postmask\n");
+		return PTR_ERR(priv->regs);
+	}
+
+#if IS_REACHABLE(CONFIG_MTK_CMDQ)
+	ret = cmdq_dev_get_client_reg(dev, &priv->cmdq_reg, 0);
+	if (ret)
+		dev_dbg(dev, "get mediatek,gce-client-reg fail!\n");
+#endif
+
+	priv->data = of_device_get_match_data(dev);
+	platform_set_drvdata(pdev, priv);
+
+	pm_runtime_enable(dev);
+
+	ret = component_add(dev, &mtk_disp_postmask_component_ops);
+	if (ret)
+		dev_err(dev, "Failed to add component: %d\n", ret);
+
+	return ret;
+}
+
+static int mtk_disp_postmask_remove(struct platform_device *pdev)
+{
+	component_del(&pdev->dev, &mtk_disp_postmask_component_ops);
+
+	pm_runtime_disable(&pdev->dev);
+
+	return 0;
+}
+
+static const struct of_device_id mtk_disp_postmask_driver_dt_match[] = {
+	{},
+};
+MODULE_DEVICE_TABLE(of, mtk_disp_postmask_driver_dt_match);
+
+struct platform_driver mtk_disp_postmask_driver = {
+	.probe		= mtk_disp_postmask_probe,
+	.remove		= mtk_disp_postmask_remove,
+	.driver		= {
+		.name	= "mediatek-disp-postmask",
+		.owner	= THIS_MODULE,
+		.of_match_table = mtk_disp_postmask_driver_dt_match,
+	},
+};
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
index ccfaada998cf5..6c539783118dd 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.c
@@ -415,6 +415,14 @@ static const struct mtk_ddp_comp_funcs ddp_ovl = {
 	.bgclr_in_off = mtk_ovl_bgclr_in_off,
 };
 
+static const struct mtk_ddp_comp_funcs ddp_postmask = {
+	.clk_enable = mtk_postmask_clk_enable,
+        .clk_disable = mtk_postmask_clk_disable,
+	.config = mtk_postmask_config,
+	.start = mtk_postmask_start,
+	.stop = mtk_postmask_stop,
+};
+
 static const struct mtk_ddp_comp_funcs ddp_rdma = {
 	.clk_enable = mtk_rdma_clk_enable,
 	.clk_disable = mtk_rdma_clk_disable,
@@ -450,6 +458,7 @@ static const char * const mtk_ddp_comp_stem[MTK_DDP_COMP_TYPE_MAX] = {
 	[MTK_DISP_MUTEX] = "mutex",
 	[MTK_DISP_OD] = "od",
 	[MTK_DISP_BLS] = "bls",
+	[MTK_DISP_POSTMASK] = "postmask",
 };
 
 struct mtk_ddp_comp_match {
@@ -480,6 +489,7 @@ static const struct mtk_ddp_comp_match mtk_ddp_matches[DDP_COMPONENT_ID_MAX] = {
 	[DDP_COMPONENT_OVL_2L0]	= { MTK_DISP_OVL_2L,	0, &ddp_ovl },
 	[DDP_COMPONENT_OVL_2L1]	= { MTK_DISP_OVL_2L,	1, &ddp_ovl },
 	[DDP_COMPONENT_OVL_2L2] = { MTK_DISP_OVL_2L,    2, &ddp_ovl },
+	[DDP_COMPONENT_POSTMASK0]	= { MTK_DISP_POSTMASK,	0, &ddp_postmask },
 	[DDP_COMPONENT_PWM0]	= { MTK_DISP_PWM,	0, NULL },
 	[DDP_COMPONENT_PWM1]	= { MTK_DISP_PWM,	1, NULL },
 	[DDP_COMPONENT_PWM2]	= { MTK_DISP_PWM,	2, NULL },
@@ -603,6 +613,7 @@ int mtk_ddp_comp_init(struct device_node *node, struct mtk_ddp_comp *comp,
 	if (type == MTK_DISP_BLS ||
 	    type == MTK_DISP_COLOR ||
 	    type == MTK_DISP_GAMMA ||
+	    type == MTK_DISP_POSTMASK ||
 	    type == MTK_DPI ||
 	    type == MTK_DSI ||
 	    type == MTK_DISP_OVL ||
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
index bb914d976cf5d..cd1dec6b4cdf2 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
+++ b/drivers/gpu/drm/mediatek/mtk_drm_ddp_comp.h
@@ -30,6 +30,7 @@ enum mtk_ddp_comp_type {
 	MTK_DISP_UFOE,
 	MTK_DSI,
 	MTK_DPI,
+	MTK_DISP_POSTMASK,
 	MTK_DISP_PWM,
 	MTK_DISP_MUTEX,
 	MTK_DISP_OD,
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.c b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
index 486e73e675ad5..d99afc8528684 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.c
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.c
@@ -531,7 +531,7 @@ static int mtk_drm_probe(struct platform_device *pdev)
 		private->comp_node[comp_id] = of_node_get(node);
 
 		/*
-		 * Currently only the COLOR, GAMMA, OVL, RDMA, DSI, and DPI blocks have
+		 * Currently only the COLOR, GAMMA, OVL, POSTMASK, RDMA, DSI, and DPI blocks have
 		 * separate component platform drivers and initialize their own
 		 * DDP component structure. The others are initialized here.
 		 */
@@ -539,6 +539,7 @@ static int mtk_drm_probe(struct platform_device *pdev)
 		    comp_type == MTK_DISP_GAMMA ||
 		    comp_type == MTK_DISP_OVL ||
 		    comp_type == MTK_DISP_OVL_2L ||
+		    comp_type == MTK_DISP_POSTMASK ||
 		    comp_type == MTK_DISP_RDMA ||
 		    comp_type == MTK_DSI ||
 		    comp_type == MTK_DPI) {
@@ -637,6 +638,7 @@ static struct platform_driver * const mtk_drm_drivers[] = {
 	&mtk_disp_color_driver,
 	&mtk_disp_gamma_driver,
 	&mtk_disp_ovl_driver,
+	&mtk_disp_postmask_driver,
 	&mtk_disp_rdma_driver,
 	&mtk_dpi_driver,
 	&mtk_drm_platform_driver,
diff --git a/drivers/gpu/drm/mediatek/mtk_drm_drv.h b/drivers/gpu/drm/mediatek/mtk_drm_drv.h
index 0e54e3d51014a..7e7b28e32aa2f 100644
--- a/drivers/gpu/drm/mediatek/mtk_drm_drv.h
+++ b/drivers/gpu/drm/mediatek/mtk_drm_drv.h
@@ -49,6 +49,7 @@ struct mtk_drm_private {
 extern struct platform_driver mtk_disp_color_driver;
 extern struct platform_driver mtk_disp_gamma_driver;
 extern struct platform_driver mtk_disp_ovl_driver;
+extern struct platform_driver mtk_disp_postmask_driver;
 extern struct platform_driver mtk_disp_rdma_driver;
 extern struct platform_driver mtk_dpi_driver;
 extern struct platform_driver mtk_dsi_driver;
-- 
2.30.0.365.g02bc693789-goog