drivers/gpu/drm/mediatek/mtk_disp_rdma.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2015 MediaTek Inc.
   4  */
   5
   6 #include <drm/drm_fourcc.h>
   7
   8 #include <linux/clk.h>
   9 #include <linux/component.h>
  10 #include <linux/module.h>
  11 #include <linux/of.h>
  12 #include <linux/platform_device.h>
  13 #include <linux/pm_runtime.h>
  14 #include <linux/soc/mediatek/mtk-cmdq.h>
  15
  16 #include "mtk_disp_drv.h"
  17 #include "mtk_drm_crtc.h"
  18 #include "mtk_drm_ddp_comp.h"
  19 #include "mtk_drm_drv.h"
  20
  21 #define DISP_REG_RDMA_INT_ENABLE                0x0000
  22 #define DISP_REG_RDMA_INT_STATUS                0x0004
  23 #define RDMA_TARGET_LINE_INT                            BIT(5)
  24 #define RDMA_FIFO_UNDERFLOW_INT                         BIT(4)
  25 #define RDMA_EOF_ABNORMAL_INT                           BIT(3)
  26 #define RDMA_FRAME_END_INT                              BIT(2)
  27 #define RDMA_FRAME_START_INT                            BIT(1)
  28 #define RDMA_REG_UPDATE_INT                             BIT(0)
  29 #define DISP_REG_RDMA_GLOBAL_CON                0x0010
  30 #define RDMA_ENGINE_EN                                  BIT(0)
  31 #define RDMA_MODE_MEMORY                                BIT(1)
  32 #define DISP_REG_RDMA_SIZE_CON_0                0x0014
  33 #define RDMA_MATRIX_ENABLE                              BIT(17)
  34 #define RDMA_MATRIX_INT_MTX_SEL                         GENMASK(23, 20)
  35 #define RDMA_MATRIX_INT_MTX_BT601_to_RGB                (6 << 20)
  36 #define DISP_REG_RDMA_SIZE_CON_1                0x0018
  37 #define DISP_REG_RDMA_TARGET_LINE               0x001c
  38 #define DISP_RDMA_MEM_CON                       0x0024
  39 #define MEM_MODE_INPUT_FORMAT_RGB565                    (0x000 << 4)
  40 #define MEM_MODE_INPUT_FORMAT_RGB888                    (0x001 << 4)
  41 #define MEM_MODE_INPUT_FORMAT_RGBA8888                  (0x002 << 4)
  42 #define MEM_MODE_INPUT_FORMAT_ARGB8888                  (0x003 << 4)
  43 #define MEM_MODE_INPUT_FORMAT_UYVY                      (0x004 << 4)
  44 #define MEM_MODE_INPUT_FORMAT_YUYV                      (0x005 << 4)
  45 #define MEM_MODE_INPUT_SWAP                             BIT(8)
  46 #define DISP_RDMA_MEM_SRC_PITCH                 0x002c
  47 #define DISP_RDMA_MEM_GMC_SETTING_0             0x0030
  48 #define DISP_REG_RDMA_FIFO_CON                  0x0040
  49 #define RDMA_FIFO_UNDERFLOW_EN                          BIT(31)
  50 #define RDMA_FIFO_PSEUDO_SIZE(bytes)                    (((bytes) / 16) << 16)
  51 #define RDMA_OUTPUT_VALID_FIFO_THRESHOLD(bytes)         ((bytes) / 16)
  52 #define RDMA_FIFO_SIZE(rdma)                    ((rdma)->data->fifo_size)
  53 #define DISP_RDMA_MEM_START_ADDR                0x0f00
  54
  55 #define RDMA_MEM_GMC                            0x40402020
  56
  57 static const u32 mt8173_formats[] = {
  58         DRM_FORMAT_XRGB8888,
  59         DRM_FORMAT_ARGB8888,
  60         DRM_FORMAT_BGRX8888,
  61         DRM_FORMAT_BGRA8888,
  62         DRM_FORMAT_ABGR8888,
  63         DRM_FORMAT_XBGR8888,
  64         DRM_FORMAT_RGB888,
  65         DRM_FORMAT_BGR888,
  66         DRM_FORMAT_RGB565,
  67         DRM_FORMAT_UYVY,
  68         DRM_FORMAT_YUYV,
  69 };
  70
  71 struct mtk_disp_rdma_data {
  72         unsigned int fifo_size;
  73         const u32 *formats;
  74         size_t num_formats;
  75 };
  76
  77 /*
  78  * struct mtk_disp_rdma - DISP_RDMA driver structure
  79  * @data: local driver data
  80  */
  81 struct mtk_disp_rdma {
  82         struct clk                      *clk;
  83         void __iomem                    *regs;
  84         struct cmdq_client_reg          cmdq_reg;
  85         const struct mtk_disp_rdma_data *data;
  86         void                            (*vblank_cb)(void *data);
  87         void                            *vblank_cb_data;
  88         u32                             fifo_size;
  89 };
  90
  91 static irqreturn_t mtk_disp_rdma_irq_handler(int irq, void *dev_id)
  92 {
  93         struct mtk_disp_rdma *priv = dev_id;
  94
  95         /* Clear frame completion interrupt */
  96         writel(0x0, priv->regs + DISP_REG_RDMA_INT_STATUS);
  97
  98         if (!priv->vblank_cb)
  99                 return IRQ_NONE;
 100
 101         priv->vblank_cb(priv->vblank_cb_data);
 102
 103         return IRQ_HANDLED;
 104 }
 105
 106 static void rdma_update_bits(struct device *dev, unsigned int reg,
 107                              unsigned int mask, unsigned int val)
 108 {
 109         struct mtk_disp_rdma *rdma = dev_get_drvdata(dev);
 110         unsigned int tmp = readl(rdma->regs + reg);
 111
 112         tmp = (tmp & ~mask) | (val & mask);
 113         writel(tmp, rdma->regs + reg);
 114 }
 115
 116 void mtk_rdma_register_vblank_cb(struct device *dev,
 117                                  void (*vblank_cb)(void *),
 118                                  void *vblank_cb_data)
 119 {
 120         struct mtk_disp_rdma *rdma = dev_get_drvdata(dev);
 121
 122         rdma->vblank_cb = vblank_cb;
 123         rdma->vblank_cb_data = vblank_cb_data;
 124 }
 125
 126 void mtk_rdma_unregister_vblank_cb(struct device *dev)
 127 {
 128         struct mtk_disp_rdma *rdma = dev_get_drvdata(dev);
 129
 130         rdma->vblank_cb = NULL;
 131         rdma->vblank_cb_data = NULL;
 132 }
 133
 134 void mtk_rdma_enable_vblank(struct device *dev)
 135 {
 136         rdma_update_bits(dev, DISP_REG_RDMA_INT_ENABLE, RDMA_FRAME_END_INT,
 137                          RDMA_FRAME_END_INT);
 138 }
 139
 140 void mtk_rdma_disable_vblank(struct device *dev)
 141 {
 142         rdma_update_bits(dev, DISP_REG_RDMA_INT_ENABLE, RDMA_FRAME_END_INT, 0);
 143 }
 144
 145 const u32 *mtk_rdma_get_formats(struct device *dev)
 146 {
 147         struct mtk_disp_rdma *rdma = dev_get_drvdata(dev);
 148
 149         return rdma->data->formats;
 150 }
 151
 152 size_t mtk_rdma_get_num_formats(struct device *dev)
 153 {
 154         struct mtk_disp_rdma *rdma = dev_get_drvdata(dev);
 155
 156         return rdma->data->num_formats;
 157 }
 158
 159 int mtk_rdma_clk_enable(struct device *dev)
 160 {
 161         struct mtk_disp_rdma *rdma = dev_get_drvdata(dev);
 162
 163         return clk_prepare_enable(rdma->clk);
 164 }
 165
 166 void mtk_rdma_clk_disable(struct device *dev)
 167 {
 168         struct mtk_disp_rdma *rdma = dev_get_drvdata(dev);
 169
 170         clk_disable_unprepare(rdma->clk);
 171 }
 172
 173 void mtk_rdma_start(struct device *dev)
 174 {
 175         rdma_update_bits(dev, DISP_REG_RDMA_GLOBAL_CON, RDMA_ENGINE_EN,
 176                          RDMA_ENGINE_EN);
 177 }
 178
 179 void mtk_rdma_stop(struct device *dev)
 180 {
 181         rdma_update_bits(dev, DISP_REG_RDMA_GLOBAL_CON, RDMA_ENGINE_EN, 0);
 182 }
 183
 184 void mtk_rdma_config(struct device *dev, unsigned int width,
 185                      unsigned int height, unsigned int vrefresh,
 186                      unsigned int bpc, struct cmdq_pkt *cmdq_pkt)
 187 {
 188         unsigned int threshold;
 189         unsigned int reg;
 190         struct mtk_disp_rdma *rdma = dev_get_drvdata(dev);
 191         u32 rdma_fifo_size;
 192
 193         mtk_ddp_write_mask(cmdq_pkt, width, &rdma->cmdq_reg, rdma->regs,
 194                            DISP_REG_RDMA_SIZE_CON_0, 0xfff);
 195         mtk_ddp_write_mask(cmdq_pkt, height, &rdma->cmdq_reg, rdma->regs,
 196                            DISP_REG_RDMA_SIZE_CON_1, 0xfffff);
 197
 198         if (rdma->fifo_size)
 199                 rdma_fifo_size = rdma->fifo_size;
 200         else
 201                 rdma_fifo_size = RDMA_FIFO_SIZE(rdma);
 202
 203         /*
 204          * Enable FIFO underflow since DSI and DPI can't be blocked.
 205          * Keep the FIFO pseudo size reset default of 8 KiB. Set the
 206          * output threshold to 70% of max fifo size to make sure the
 207          * threhold will not overflow
 208          */
 209         threshold = rdma_fifo_size * 7 / 10;
 210         reg = RDMA_FIFO_UNDERFLOW_EN |
 211               RDMA_FIFO_PSEUDO_SIZE(rdma_fifo_size) |
 212               RDMA_OUTPUT_VALID_FIFO_THRESHOLD(threshold);
 213         mtk_ddp_write(cmdq_pkt, reg, &rdma->cmdq_reg, rdma->regs, DISP_REG_RDMA_FIFO_CON);
 214 }
 215
 216 static unsigned int rdma_fmt_convert(struct mtk_disp_rdma *rdma,
 217                                      unsigned int fmt)
 218 {
 219         /* The return value in switch "MEM_MODE_INPUT_FORMAT_XXX"
 220          * is defined in mediatek HW data sheet.
 221          * The alphabet order in XXX is no relation to data
 222          * arrangement in memory.
 223          */
 224         switch (fmt) {
 225         default:
 226         case DRM_FORMAT_RGB565:
 227                 return MEM_MODE_INPUT_FORMAT_RGB565;
 228         case DRM_FORMAT_BGR565:
 229                 return MEM_MODE_INPUT_FORMAT_RGB565 | MEM_MODE_INPUT_SWAP;
 230         case DRM_FORMAT_RGB888:
 231                 return MEM_MODE_INPUT_FORMAT_RGB888;
 232         case DRM_FORMAT_BGR888:
 233                 return MEM_MODE_INPUT_FORMAT_RGB888 | MEM_MODE_INPUT_SWAP;
 234         case DRM_FORMAT_RGBX8888:
 235         case DRM_FORMAT_RGBA8888:
 236                 return MEM_MODE_INPUT_FORMAT_ARGB8888;
 237         case DRM_FORMAT_BGRX8888:
 238         case DRM_FORMAT_BGRA8888:
 239                 return MEM_MODE_INPUT_FORMAT_ARGB8888 | MEM_MODE_INPUT_SWAP;
 240         case DRM_FORMAT_XRGB8888:
 241         case DRM_FORMAT_ARGB8888:
 242                 return MEM_MODE_INPUT_FORMAT_RGBA8888;
 243         case DRM_FORMAT_XBGR8888:
 244         case DRM_FORMAT_ABGR8888:
 245                 return MEM_MODE_INPUT_FORMAT_RGBA8888 | MEM_MODE_INPUT_SWAP;
 246         case DRM_FORMAT_UYVY:
 247                 return MEM_MODE_INPUT_FORMAT_UYVY;
 248         case DRM_FORMAT_YUYV:
 249                 return MEM_MODE_INPUT_FORMAT_YUYV;
 250         }
 251 }
 252
 253 unsigned int mtk_rdma_layer_nr(struct device *dev)
 254 {
 255         return 1;
 256 }
 257
 258 void mtk_rdma_layer_config(struct device *dev, unsigned int idx,
 259                            struct mtk_plane_state *state,
 260                            struct cmdq_pkt *cmdq_pkt)
 261 {
 262         struct mtk_disp_rdma *rdma = dev_get_drvdata(dev);
 263         struct mtk_plane_pending_state *pending = &state->pending;
 264         unsigned int addr = pending->addr;
 265         unsigned int pitch = pending->pitch & 0xffff;
 266         unsigned int fmt = pending->format;
 267         unsigned int con;
 268
 269         con = rdma_fmt_convert(rdma, fmt);
 270         mtk_ddp_write_relaxed(cmdq_pkt, con, &rdma->cmdq_reg, rdma->regs, DISP_RDMA_MEM_CON);
 271
 272         if (fmt == DRM_FORMAT_UYVY || fmt == DRM_FORMAT_YUYV) {
 273                 mtk_ddp_write_mask(cmdq_pkt, RDMA_MATRIX_ENABLE, &rdma->cmdq_reg, rdma->regs,
 274                                    DISP_REG_RDMA_SIZE_CON_0,
 275                                    RDMA_MATRIX_ENABLE);
 276                 mtk_ddp_write_mask(cmdq_pkt, RDMA_MATRIX_INT_MTX_BT601_to_RGB,
 277                                    &rdma->cmdq_reg, rdma->regs, DISP_REG_RDMA_SIZE_CON_0,
 278                                    RDMA_MATRIX_INT_MTX_SEL);
 279         } else {
 280                 mtk_ddp_write_mask(cmdq_pkt, 0, &rdma->cmdq_reg, rdma->regs,
 281                                    DISP_REG_RDMA_SIZE_CON_0,
 282                                    RDMA_MATRIX_ENABLE);
 283         }
 284         mtk_ddp_write_relaxed(cmdq_pkt, addr, &rdma->cmdq_reg, rdma->regs,
 285                               DISP_RDMA_MEM_START_ADDR);
 286         mtk_ddp_write_relaxed(cmdq_pkt, pitch, &rdma->cmdq_reg, rdma->regs,
 287                               DISP_RDMA_MEM_SRC_PITCH);
 288         mtk_ddp_write(cmdq_pkt, RDMA_MEM_GMC, &rdma->cmdq_reg, rdma->regs,
 289                       DISP_RDMA_MEM_GMC_SETTING_0);
 290         mtk_ddp_write_mask(cmdq_pkt, RDMA_MODE_MEMORY, &rdma->cmdq_reg, rdma->regs,
 291                            DISP_REG_RDMA_GLOBAL_CON, RDMA_MODE_MEMORY);
 292
 293 }
 294
 295 static int mtk_disp_rdma_bind(struct device *dev, struct device *master,
 296                               void *data)
 297 {
 298         return 0;
 299
 300 }
 301
 302 static void mtk_disp_rdma_unbind(struct device *dev, struct device *master,
 303                                  void *data)
 304 {
 305 }
 306
 307 static const struct component_ops mtk_disp_rdma_component_ops = {
 308         .bind   = mtk_disp_rdma_bind,
 309         .unbind = mtk_disp_rdma_unbind,
 310 };
 311
 312 static int mtk_disp_rdma_probe(struct platform_device *pdev)
 313 {
 314         struct device *dev = &pdev->dev;
 315         struct mtk_disp_rdma *priv;
 316         struct resource *res;
 317         int irq;
 318         int ret;
 319
 320         priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
 321         if (!priv)
 322                 return -ENOMEM;
 323
 324         irq = platform_get_irq(pdev, 0);
 325         if (irq < 0)
 326                 return irq;
 327
 328         priv->clk = devm_clk_get(dev, NULL);
 329         if (IS_ERR(priv->clk)) {
 330                 dev_err(dev, "failed to get rdma clk\n");
 331                 return PTR_ERR(priv->clk);
 332         }
 333
 334         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 335         priv->regs = devm_ioremap_resource(dev, res);
 336         if (IS_ERR(priv->regs)) {
 337                 dev_err(dev, "failed to ioremap rdma\n");
 338                 return PTR_ERR(priv->regs);
 339         }
 340 #if IS_REACHABLE(CONFIG_MTK_CMDQ)
 341         ret = cmdq_dev_get_client_reg(dev, &priv->cmdq_reg, 0);
 342         if (ret)
 343                 dev_dbg(dev, "get mediatek,gce-client-reg fail!\n");
 344 #endif
 345
 346         if (of_find_property(dev->of_node, "mediatek,rdma-fifo-size", &ret)) {
 347                 ret = of_property_read_u32(dev->of_node,
 348                                            "mediatek,rdma-fifo-size",
 349                                            &priv->fifo_size);
 350                 if (ret) {
 351                         dev_err(dev, "Failed to get rdma fifo size\n");
 352                         return ret;
 353                 }
 354         }
 355
 356         /* Disable and clear pending interrupts */
 357         writel(0x0, priv->regs + DISP_REG_RDMA_INT_ENABLE);
 358         writel(0x0, priv->regs + DISP_REG_RDMA_INT_STATUS);
 359
 360         ret = devm_request_irq(dev, irq, mtk_disp_rdma_irq_handler,
 361                                IRQF_TRIGGER_NONE, dev_name(dev), priv);
 362         if (ret < 0) {
 363                 dev_err(dev, "Failed to request irq %d: %d\n", irq, ret);
 364                 return ret;
 365         }
 366
 367         priv->data = of_device_get_match_data(dev);
 368
 369         platform_set_drvdata(pdev, priv);
 370
 371         pm_runtime_enable(dev);
 372
 373         ret = component_add(dev, &mtk_disp_rdma_component_ops);
 374         if (ret) {
 375                 pm_runtime_disable(dev);
 376                 dev_err(dev, "Failed to add component: %d\n", ret);
 377         }
 378
 379         return ret;
 380 }
 381
 382 static void mtk_disp_rdma_remove(struct platform_device *pdev)
 383 {
 384         component_del(&pdev->dev, &mtk_disp_rdma_component_ops);
 385
 386         pm_runtime_disable(&pdev->dev);
 387 }
 388
 389 static const struct mtk_disp_rdma_data mt2701_rdma_driver_data = {
 390         .fifo_size = SZ_4K,
 391         .formats = mt8173_formats,
 392         .num_formats = ARRAY_SIZE(mt8173_formats),
 393 };
 394
 395 static const struct mtk_disp_rdma_data mt8173_rdma_driver_data = {
 396         .fifo_size = SZ_8K,
 397         .formats = mt8173_formats,
 398         .num_formats = ARRAY_SIZE(mt8173_formats),
 399 };
 400
 401 static const struct mtk_disp_rdma_data mt8183_rdma_driver_data = {
 402         .fifo_size = 5 * SZ_1K,
 403         .formats = mt8173_formats,
 404         .num_formats = ARRAY_SIZE(mt8173_formats),
 405 };
 406
 407 static const struct mtk_disp_rdma_data mt8195_rdma_driver_data = {
 408         .fifo_size = 1920,
 409         .formats = mt8173_formats,
 410         .num_formats = ARRAY_SIZE(mt8173_formats),
 411 };
 412
 413 static const struct of_device_id mtk_disp_rdma_driver_dt_match[] = {
 414         { .compatible = "mediatek,mt2701-disp-rdma",
 415           .data = &mt2701_rdma_driver_data},
 416         { .compatible = "mediatek,mt8173-disp-rdma",
 417           .data = &mt8173_rdma_driver_data},
 418         { .compatible = "mediatek,mt8183-disp-rdma",
 419           .data = &mt8183_rdma_driver_data},
 420         { .compatible = "mediatek,mt8195-disp-rdma",
 421           .data = &mt8195_rdma_driver_data},
 422         {},
 423 };
 424 MODULE_DEVICE_TABLE(of, mtk_disp_rdma_driver_dt_match);
 425
 426 struct platform_driver mtk_disp_rdma_driver = {
 427         .probe          = mtk_disp_rdma_probe,
 428         .remove_new     = mtk_disp_rdma_remove,
 429         .driver         = {
 430                 .name   = "mediatek-disp-rdma",
 431                 .owner  = THIS_MODULE,
 432                 .of_match_table = mtk_disp_rdma_driver_dt_match,
 433         },
 434 };