Re: [PATCH v5 11/16] drm/mediatek: add display MDP RDMA support for MT8195

Hi, Nancy:

Nancy.Lin nancy.lin@mediatek.com 於 2021年9月6日 週一 下午3:15寫道：

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 | 301 ++++++++++++++++++++++++ drivers/gpu/drm/mediatek/mtk_mdp_rdma.h | 37 +++ 4 files changed, 347 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..052434d960b9 --- /dev/null +++ b/drivers/gpu/drm/mediatek/mtk_mdp_rdma.c @@ -0,0 +1,301 @@ +// 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)
  

Maybe my description is not good, I like the style of rdma driver [1].

[1] https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/driv...

+#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 | FLD_UFBDC_EN | 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);
  

Why enable target line?

+}

+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
  

It seems that this is the register definition. If this definition is changed in next SoC, how to define this value? Maybe we could pass the drm_color_encoding and drm_color_range information for YUV format, and let rdma do the translation in this driver.

Regards, Chun-Kuang.

+};

+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