[PATCH v4 12/17] drm/mediatek: add display MDP RDMA support for MT8195

[Nancy.Lin <nancy.lin@mediatek.com>]

Add MDP_RDMA driver for MT8195. MDP_RDMA is the DMA engine of
the ovl_adaptor component.

Signed-off-by: Nancy.Lin <nancy.lin@mediatek.com>
---
 drivers/gpu/drm/mediatek/Makefile       |   3 +-
 drivers/gpu/drm/mediatek/mtk_disp_drv.h |   7 +
 drivers/gpu/drm/mediatek/mtk_mdp_rdma.c | 306 ++++++++++++++++++++++++
 drivers/gpu/drm/mediatek/mtk_mdp_rdma.h |  37 +++
 4 files changed, 352 insertions(+), 1 deletion(-)
 create mode 100644 drivers/gpu/drm/mediatek/mtk_mdp_rdma.c
 create mode 100644 drivers/gpu/drm/mediatek/mtk_mdp_rdma.h

diff --git a/drivers/gpu/drm/mediatek/Makefile b/drivers/gpu/drm/mediatek/Makefile
index a38e88e82d12..6e604a933ed0 100644
--- a/drivers/gpu/drm/mediatek/Makefile
+++ b/drivers/gpu/drm/mediatek/Makefile
@@ -13,7 +13,8 @@ mediatek-drm-y := mtk_disp_aal.o \
 		  mtk_drm_gem.o \
 		  mtk_drm_plane.o \
 		  mtk_dsi.o \
-		  mtk_dpi.o
+		  mtk_dpi.o \
+		  mtk_mdp_rdma.o
 
 obj-$(CONFIG_DRM_MEDIATEK) += mediatek-drm.o
 
diff --git a/drivers/gpu/drm/mediatek/mtk_disp_drv.h b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
index a33b13fe2b6e..b3a372cab0bd 100644
--- a/drivers/gpu/drm/mediatek/mtk_disp_drv.h
+++ b/drivers/gpu/drm/mediatek/mtk_disp_drv.h
@@ -8,6 +8,7 @@
 
 #include <linux/soc/mediatek/mtk-cmdq.h>
 #include "mtk_drm_plane.h"
+#include "mtk_mdp_rdma.h"
 
 int mtk_aal_clk_enable(struct device *dev);
 void mtk_aal_clk_disable(struct device *dev);
@@ -106,4 +107,10 @@ void mtk_rdma_enable_vblank(struct device *dev,
 			    void *vblank_cb_data);
 void mtk_rdma_disable_vblank(struct device *dev);
 
+int mtk_mdp_rdma_clk_enable(struct device *dev);
+void mtk_mdp_rdma_clk_disable(struct device *dev);
+void mtk_mdp_rdma_start(struct device *dev, struct cmdq_pkt *cmdq_pkt);
+void mtk_mdp_rdma_stop(struct device *dev, struct cmdq_pkt *cmdq_pkt);
+void mtk_mdp_rdma_config(struct device *dev, struct mtk_mdp_rdma_cfg *cfg,
+			 struct cmdq_pkt *cmdq_pkt);
 #endif
diff --git a/drivers/gpu/drm/mediatek/mtk_mdp_rdma.c b/drivers/gpu/drm/mediatek/mtk_mdp_rdma.c
new file mode 100644
index 000000000000..7a0996253cfc
--- /dev/null
+++ b/drivers/gpu/drm/mediatek/mtk_mdp_rdma.c
@@ -0,0 +1,306 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2021 MediaTek Inc.
+ */
+
+#include <drm/drm_fourcc.h>
+#include <linux/clk.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/pm_runtime.h>
+#include <linux/soc/mediatek/mtk-cmdq.h>
+
+#include "mtk_drm_drv.h"
+#include "mtk_disp_drv.h"
+#include "mtk_mdp_rdma.h"
+
+#define MDP_RDMA_EN                                            0x000
+	#define FLD_ROT_ENABLE                            BIT(0)
+
+#define MDP_RDMA_RESET                                         0x008
+
+#define MDP_RDMA_CON                                           0x020
+	#define FLD_OUTPUT_10B                            BIT(5)
+	#define FLD_SIMPLE_MODE                           BIT(4)
+
+#define MDP_RDMA_GMCIF_CON                                     0x028
+	#define FLD_COMMAND_DIV                           BIT(0)
+	#define FLD_EXT_PREULTRA_EN                       BIT(3)
+	#define FLD_RD_REQ_TYPE                           GENMASK(7, 4)
+		#define VAL_RD_REQ_TYPE_BURST_8_ACCESS    7
+	#define FLD_ULTRA_EN                              GENMASK(13, 12)
+		#define VAL_ULTRA_EN_ENABLE               1
+	#define FLD_PRE_ULTRA_EN                          GENMASK(17, 16)
+		#define VAL_PRE_ULTRA_EN_ENABLE           1
+	#define FLD_EXT_ULTRA_EN                          BIT(18)
+
+#define MDP_RDMA_SRC_CON                                       0x030
+	#define FLD_OUTPUT_ARGB                           BIT(25)
+	#define FLD_BIT_NUMBER                            GENMASK(19, 18)
+	#define FLD_UNIFORM_CONFIG                        BIT(17)
+	#define FLD_SWAP                                  BIT(14)
+	#define FLD_SRC_FORMAT                            GENMASK(3, 0)
+
+#define MDP_RDMA_COMP_CON                                      0x038
+	#define FLD_AFBC_EN                               BIT(22)
+	#define FLD_AFBC_YUV_TRANSFORM                    BIT(21)
+	#define FLD_UFBDC_EN                              BIT(12)
+
+#define MDP_RDMA_MF_BKGD_SIZE_IN_BYTE                          0x060
+	#define FLD_MF_BKGD_WB                            GENMASK(22, 0)
+
+#define MDP_RDMA_MF_SRC_SIZE                                   0x070
+	#define FLD_MF_SRC_H                              GENMASK(30, 16)
+	#define FLD_MF_SRC_W                              GENMASK(14, 0)
+
+#define MDP_RDMA_MF_CLIP_SIZE                                  0x078
+	#define FLD_MF_CLIP_H                             GENMASK(30, 16)
+	#define FLD_MF_CLIP_W                             GENMASK(14, 0)
+
+#define MDP_RDMA_TARGET_LINE                                   0x0a0
+	#define FLD_LINE_THRESHOLD                        GENMASK(31, 17)
+	#define FLD_TARGET_LINE_EN                        BIT(16)
+
+#define MDP_RDMA_SRC_OFFSET_0                                  0x118
+	#define FLD_SRC_OFFSET_0                          GENMASK(31, 0)
+
+#define MDP_RDMA_TRANSFORM_0                                   0x200
+	#define FLD_INT_MATRIX_SEL                        GENMASK(27, 23)
+	#define FLD_TRANS_EN                              BIT(16)
+
+#define MDP_RDMA_SRC_BASE_0                                    0xf00
+	#define FLD_SRC_BASE_0                            GENMASK(31, 0)
+
+#define RDMA_INPUT_SWAP		BIT(14)
+#define RDMA_INPUT_10BIT	BIT(18)
+
+enum rdma_format {
+	RDMA_INPUT_FORMAT_RGB565 = 0,
+	RDMA_INPUT_FORMAT_RGB888 = 1,
+	RDMA_INPUT_FORMAT_RGBA8888 = 2,
+	RDMA_INPUT_FORMAT_ARGB8888 = 3,
+	RDMA_INPUT_FORMAT_UYVY = 4,
+	RDMA_INPUT_FORMAT_YUY2 = 5,
+	RDMA_INPUT_FORMAT_Y8 = 7,
+	RDMA_INPUT_FORMAT_YV12 = 8,
+	RDMA_INPUT_FORMAT_UYVY_3PL = 9,
+	RDMA_INPUT_FORMAT_NV12 = 12,
+	RDMA_INPUT_FORMAT_UYVY_2PL = 13,
+	RDMA_INPUT_FORMAT_Y410 = 14
+};
+
+struct mtk_mdp_rdma {
+	void __iomem *regs;
+	struct clk *clk;
+	struct cmdq_client_reg		cmdq_reg;
+};
+
+static unsigned int rdma_fmt_convert(unsigned int fmt)
+{
+	switch (fmt) {
+	default:
+	case DRM_FORMAT_RGB565:
+		return RDMA_INPUT_FORMAT_RGB565;
+	case DRM_FORMAT_BGR565:
+		return RDMA_INPUT_FORMAT_RGB565 | RDMA_INPUT_SWAP;
+	case DRM_FORMAT_RGB888:
+		return RDMA_INPUT_FORMAT_RGB888;
+	case DRM_FORMAT_BGR888:
+		return RDMA_INPUT_FORMAT_RGB888 | RDMA_INPUT_SWAP;
+	case DRM_FORMAT_RGBX8888:
+	case DRM_FORMAT_RGBA8888:
+		return RDMA_INPUT_FORMAT_ARGB8888;
+	case DRM_FORMAT_BGRX8888:
+	case DRM_FORMAT_BGRA8888:
+		return RDMA_INPUT_FORMAT_ARGB8888 | RDMA_INPUT_SWAP;
+	case DRM_FORMAT_XRGB8888:
+	case DRM_FORMAT_ARGB8888:
+		return RDMA_INPUT_FORMAT_RGBA8888;
+	case DRM_FORMAT_XBGR8888:
+	case DRM_FORMAT_ABGR8888:
+		return RDMA_INPUT_FORMAT_RGBA8888 | RDMA_INPUT_SWAP;
+	case DRM_FORMAT_ABGR2101010:
+		return RDMA_INPUT_FORMAT_RGBA8888 | RDMA_INPUT_SWAP |
+				RDMA_INPUT_10BIT;
+	case DRM_FORMAT_ARGB2101010:
+		return RDMA_INPUT_FORMAT_RGBA8888 | RDMA_INPUT_10BIT;
+	case DRM_FORMAT_RGBA1010102:
+		return RDMA_INPUT_FORMAT_ARGB8888 | RDMA_INPUT_SWAP |
+				RDMA_INPUT_10BIT;
+	case DRM_FORMAT_BGRA1010102:
+		return RDMA_INPUT_FORMAT_ARGB8888 | RDMA_INPUT_10BIT;
+	case DRM_FORMAT_UYVY:
+		return RDMA_INPUT_FORMAT_UYVY;
+	case DRM_FORMAT_YUYV:
+		return RDMA_INPUT_FORMAT_YUY2;
+	}
+}
+
+static void mtk_mdp_rdma_fifo_config(struct device *dev, struct cmdq_pkt *cmdq_pkt)
+{
+	struct mtk_mdp_rdma *priv = dev_get_drvdata(dev);
+
+	mtk_ddp_write_mask(cmdq_pkt, FLD_EXT_ULTRA_EN | VAL_PRE_ULTRA_EN_ENABLE << 16 |
+			   VAL_ULTRA_EN_ENABLE << 12 | VAL_RD_REQ_TYPE_BURST_8_ACCESS << 4 |
+			   FLD_EXT_PREULTRA_EN | FLD_COMMAND_DIV, &priv->cmdq_reg,
+			   priv->regs, MDP_RDMA_GMCIF_CON, FLD_EXT_ULTRA_EN |
+			   FLD_PRE_ULTRA_EN | FLD_ULTRA_EN | FLD_RD_REQ_TYPE |
+			   FLD_EXT_PREULTRA_EN | FLD_COMMAND_DIV);
+}
+
+void mtk_mdp_rdma_start(struct device *dev, struct cmdq_pkt *cmdq_pkt)
+{
+	struct mtk_mdp_rdma *priv = dev_get_drvdata(dev);
+
+	mtk_ddp_write_mask(cmdq_pkt, FLD_ROT_ENABLE, &priv->cmdq_reg,
+			   priv->regs, MDP_RDMA_EN, FLD_ROT_ENABLE);
+}
+
+void mtk_mdp_rdma_stop(struct device *dev, struct cmdq_pkt *cmdq_pkt)
+{
+	struct mtk_mdp_rdma *priv = dev_get_drvdata(dev);
+
+	mtk_ddp_write_mask(cmdq_pkt, 0, &priv->cmdq_reg,
+			   priv->regs, MDP_RDMA_EN, FLD_ROT_ENABLE);
+	mtk_ddp_write(cmdq_pkt, 1, &priv->cmdq_reg, priv->regs, MDP_RDMA_RESET);
+	mtk_ddp_write(cmdq_pkt, 0, &priv->cmdq_reg, priv->regs, MDP_RDMA_RESET);
+}
+
+void mtk_mdp_rdma_config(struct device *dev, struct mtk_mdp_rdma_cfg *cfg,
+			 struct cmdq_pkt *cmdq_pkt)
+{
+	struct mtk_mdp_rdma *priv = dev_get_drvdata(dev);
+	const struct drm_format_info *fmt_info = drm_format_info(cfg->fmt);
+	unsigned int src_pitch_y = cfg->pitch;
+	unsigned int bpp_y = fmt_info->cpp[0] * 8;
+	unsigned int offset_y = 0;
+
+	mtk_mdp_rdma_fifo_config(dev, cmdq_pkt);
+
+	mtk_ddp_write_mask(cmdq_pkt, FLD_UNIFORM_CONFIG, &priv->cmdq_reg, priv->regs,
+			   MDP_RDMA_SRC_CON, FLD_UNIFORM_CONFIG);
+	mtk_ddp_write_mask(cmdq_pkt, rdma_fmt_convert(cfg->fmt), &priv->cmdq_reg, priv->regs,
+			   MDP_RDMA_SRC_CON, FLD_SWAP | FLD_SRC_FORMAT | FLD_BIT_NUMBER);
+
+	if (!cfg->csc_enable && fmt_info->has_alpha)
+		mtk_ddp_write_mask(cmdq_pkt, FLD_OUTPUT_ARGB, &priv->cmdq_reg,
+				   priv->regs, MDP_RDMA_SRC_CON, FLD_OUTPUT_ARGB);
+	else
+		mtk_ddp_write_mask(cmdq_pkt, 0, &priv->cmdq_reg, priv->regs,
+				   MDP_RDMA_SRC_CON, FLD_OUTPUT_ARGB);
+
+	mtk_ddp_write_mask(cmdq_pkt, cfg->addr0, &priv->cmdq_reg, priv->regs,
+			   MDP_RDMA_SRC_BASE_0, FLD_SRC_BASE_0);
+
+	mtk_ddp_write_mask(cmdq_pkt, src_pitch_y, &priv->cmdq_reg, priv->regs,
+			   MDP_RDMA_MF_BKGD_SIZE_IN_BYTE, FLD_MF_BKGD_WB);
+
+	mtk_ddp_write_mask(cmdq_pkt, 0, &priv->cmdq_reg, priv->regs, MDP_RDMA_COMP_CON,
+			   FLD_AFBC_YUV_TRANSFORM);
+	mtk_ddp_write_mask(cmdq_pkt, 0, &priv->cmdq_reg, priv->regs, MDP_RDMA_COMP_CON,
+			   FLD_UFBDC_EN);
+	mtk_ddp_write_mask(cmdq_pkt, 0, &priv->cmdq_reg, priv->regs, MDP_RDMA_COMP_CON,
+			   FLD_AFBC_EN);
+
+	mtk_ddp_write_mask(cmdq_pkt, FLD_OUTPUT_10B, &priv->cmdq_reg, priv->regs,
+			   MDP_RDMA_CON, FLD_OUTPUT_10B);
+	mtk_ddp_write_mask(cmdq_pkt, FLD_SIMPLE_MODE, &priv->cmdq_reg, priv->regs,
+			   MDP_RDMA_CON, FLD_SIMPLE_MODE);
+	mtk_ddp_write_mask(cmdq_pkt, cfg->csc_enable << 16, &priv->cmdq_reg, priv->regs,
+			   MDP_RDMA_TRANSFORM_0, FLD_TRANS_EN);
+	mtk_ddp_write_mask(cmdq_pkt, cfg->profile << 23, &priv->cmdq_reg, priv->regs,
+			   MDP_RDMA_TRANSFORM_0, FLD_INT_MATRIX_SEL);
+
+	offset_y  = (cfg->x_left * bpp_y >> 3) + cfg->y_top * src_pitch_y;
+
+	mtk_ddp_write_mask(cmdq_pkt, offset_y, &priv->cmdq_reg, priv->regs,
+			   MDP_RDMA_SRC_OFFSET_0, FLD_SRC_OFFSET_0);
+	mtk_ddp_write_mask(cmdq_pkt, cfg->width, &priv->cmdq_reg, priv->regs,
+			   MDP_RDMA_MF_SRC_SIZE, FLD_MF_SRC_W);
+	mtk_ddp_write_mask(cmdq_pkt, cfg->height << 16, &priv->cmdq_reg, priv->regs,
+			   MDP_RDMA_MF_SRC_SIZE, FLD_MF_SRC_H);
+	mtk_ddp_write_mask(cmdq_pkt, cfg->width, &priv->cmdq_reg, priv->regs,
+			   MDP_RDMA_MF_CLIP_SIZE, FLD_MF_CLIP_W);
+	mtk_ddp_write_mask(cmdq_pkt, cfg->height << 16, &priv->cmdq_reg, priv->regs,
+			   MDP_RDMA_MF_CLIP_SIZE, FLD_MF_CLIP_H);
+	mtk_ddp_write_mask(cmdq_pkt, cfg->height << 17, &priv->cmdq_reg, priv->regs,
+			   MDP_RDMA_TARGET_LINE, FLD_LINE_THRESHOLD);
+	mtk_ddp_write_mask(cmdq_pkt, FLD_TARGET_LINE_EN, &priv->cmdq_reg, priv->regs,
+			   MDP_RDMA_TARGET_LINE, FLD_TARGET_LINE_EN);
+}
+
+int mtk_mdp_rdma_clk_enable(struct device *dev)
+{
+	struct mtk_mdp_rdma *rdma = dev_get_drvdata(dev);
+
+	pm_runtime_get_sync(dev);
+	clk_prepare_enable(rdma->clk);
+	return 0;
+}
+
+void mtk_mdp_rdma_clk_disable(struct device *dev)
+{
+	struct mtk_mdp_rdma *rdma = dev_get_drvdata(dev);
+
+	clk_disable_unprepare(rdma->clk);
+	pm_runtime_put(dev);
+}
+
+static int mtk_mdp_rdma_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct resource *res;
+	struct mtk_mdp_rdma *priv;
+	int ret = 0;
+
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	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 rdma\n");
+		return PTR_ERR(priv->regs);
+	}
+
+	priv->clk = devm_clk_get(dev, NULL);
+	if (IS_ERR(priv->clk)) {
+		dev_err(dev, "failed to get rdma clk\n");
+		return PTR_ERR(priv->clk);
+	}
+
+#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
+	platform_set_drvdata(pdev, priv);
+
+	pm_runtime_enable(dev);
+	return ret;
+}
+
+static int mtk_mdp_rdma_remove(struct platform_device *pdev)
+{
+	pm_runtime_disable(&pdev->dev);
+	return 0;
+}
+
+static const struct of_device_id mtk_mdp_rdma_driver_dt_match[] = {
+	{ .compatible = "mediatek,mt8195-vdo1-rdma", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, mtk_mdp_rdma_driver_dt_match);
+
+struct platform_driver mtk_mdp_rdma_driver = {
+	.probe = mtk_mdp_rdma_probe,
+	.remove = mtk_mdp_rdma_remove,
+	.driver = {
+		.name = "mediatek-mdp-rdma",
+		.owner = THIS_MODULE,
+		.of_match_table = mtk_mdp_rdma_driver_dt_match,
+	},
+};
+module_platform_driver(mtk_mdp_rdma_driver);
diff --git a/drivers/gpu/drm/mediatek/mtk_mdp_rdma.h b/drivers/gpu/drm/mediatek/mtk_mdp_rdma.h
new file mode 100644
index 000000000000..df8e28f0e3a4
--- /dev/null
+++ b/drivers/gpu/drm/mediatek/mtk_mdp_rdma.h
@@ -0,0 +1,37 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2021 MediaTek Inc.
+ */
+
+#ifndef __MTK_MDP_RDMA_H__
+#define __MTK_MDP_RDMA_H__
+
+enum mtk_mdp_rdma_profile {
+	RDMA_CSC_RGB_TO_JPEG = 0,
+	RDMA_CSC_RGB_TO_FULL709 = 1,
+	RDMA_CSC_RGB_TO_BT601 = 2,
+	RDMA_CSC_RGB_TO_BT709 = 3,
+	RDMA_CSC_JPEG_TO_RGB = 4,
+	RDMA_CSC_FULL709_TO_RGB = 5,
+	RDMA_CSC_BT601_TO_RGB = 6,
+	RDMA_CSC_BT709_TO_RGB = 7,
+	RDMA_CSC_JPEG_TO_BT601 = 8,
+	RDMA_CSC_JPEG_TO_BT709 = 9,
+	RDMA_CSC_BT601_TO_JPEG = 10,
+	RDMA_CSC_BT709_TO_BT601 = 11,
+	RDMA_CSC_BT601_TO_BT709 = 12
+};
+
+struct mtk_mdp_rdma_cfg {
+	enum mtk_mdp_rdma_profile profile;
+	unsigned int pitch;
+	unsigned int addr0;
+	unsigned int width;
+	unsigned int height;
+	unsigned int x_left;
+	unsigned int y_top;
+	bool csc_enable;
+	int fmt;
+};
+
+#endif // __MTK_MDP_RDMA_H__
-- 
2.18.0