drivers/gpu/drm/mediatek/mtk_dpi.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Copyright (c) 2014 MediaTek Inc.
   4  * Author: Jie Qiu <jie.qiu@mediatek.com>
   5  */
   6
   7 #include <linux/clk.h>
   8 #include <linux/component.h>
   9 #include <linux/interrupt.h>
  10 #include <linux/kernel.h>
  11 #include <linux/of.h>
  12 #include <linux/of_device.h>
  13 #include <linux/of_gpio.h>
  14 #include <linux/of_graph.h>
  15 #include <linux/pinctrl/consumer.h>
  16 #include <linux/platform_device.h>
  17 #include <linux/types.h>
  18
  19 #include <video/videomode.h>
  20
  21 #include <drm/drm_atomic_helper.h>
  22 #include <drm/drm_bridge.h>
  23 #include <drm/drm_bridge_connector.h>
  24 #include <drm/drm_crtc.h>
  25 #include <drm/drm_of.h>
  26 #include <drm/drm_simple_kms_helper.h>
  27
  28 #include "mtk_disp_drv.h"
  29 #include "mtk_dpi_regs.h"
  30 #include "mtk_drm_ddp_comp.h"
  31
  32 enum mtk_dpi_out_bit_num {
  33         MTK_DPI_OUT_BIT_NUM_8BITS,
  34         MTK_DPI_OUT_BIT_NUM_10BITS,
  35         MTK_DPI_OUT_BIT_NUM_12BITS,
  36         MTK_DPI_OUT_BIT_NUM_16BITS
  37 };
  38
  39 enum mtk_dpi_out_yc_map {
  40         MTK_DPI_OUT_YC_MAP_RGB,
  41         MTK_DPI_OUT_YC_MAP_CYCY,
  42         MTK_DPI_OUT_YC_MAP_YCYC,
  43         MTK_DPI_OUT_YC_MAP_CY,
  44         MTK_DPI_OUT_YC_MAP_YC
  45 };
  46
  47 enum mtk_dpi_out_channel_swap {
  48         MTK_DPI_OUT_CHANNEL_SWAP_RGB,
  49         MTK_DPI_OUT_CHANNEL_SWAP_GBR,
  50         MTK_DPI_OUT_CHANNEL_SWAP_BRG,
  51         MTK_DPI_OUT_CHANNEL_SWAP_RBG,
  52         MTK_DPI_OUT_CHANNEL_SWAP_GRB,
  53         MTK_DPI_OUT_CHANNEL_SWAP_BGR
  54 };
  55
  56 enum mtk_dpi_out_color_format {
  57         MTK_DPI_COLOR_FORMAT_RGB,
  58         MTK_DPI_COLOR_FORMAT_RGB_FULL,
  59         MTK_DPI_COLOR_FORMAT_YCBCR_444,
  60         MTK_DPI_COLOR_FORMAT_YCBCR_422,
  61         MTK_DPI_COLOR_FORMAT_XV_YCC,
  62         MTK_DPI_COLOR_FORMAT_YCBCR_444_FULL,
  63         MTK_DPI_COLOR_FORMAT_YCBCR_422_FULL
  64 };
  65
  66 struct mtk_dpi {
  67         struct drm_encoder encoder;
  68         struct drm_bridge bridge;
  69         struct drm_bridge *next_bridge;
  70         struct drm_connector *connector;
  71         void __iomem *regs;
  72         struct device *dev;
  73         struct clk *engine_clk;
  74         struct clk *pixel_clk;
  75         struct clk *tvd_clk;
  76         int irq;
  77         struct drm_display_mode mode;
  78         const struct mtk_dpi_conf *conf;
  79         enum mtk_dpi_out_color_format color_format;
  80         enum mtk_dpi_out_yc_map yc_map;
  81         enum mtk_dpi_out_bit_num bit_num;
  82         enum mtk_dpi_out_channel_swap channel_swap;
  83         struct pinctrl *pinctrl;
  84         struct pinctrl_state *pins_gpio;
  85         struct pinctrl_state *pins_dpi;
  86         u32 output_fmt;
  87         int refcount;
  88 };
  89
  90 static inline struct mtk_dpi *bridge_to_dpi(struct drm_bridge *b)
  91 {
  92         return container_of(b, struct mtk_dpi, bridge);
  93 }
  94
  95 enum mtk_dpi_polarity {
  96         MTK_DPI_POLARITY_RISING,
  97         MTK_DPI_POLARITY_FALLING,
  98 };
  99
 100 struct mtk_dpi_polarities {
 101         enum mtk_dpi_polarity de_pol;
 102         enum mtk_dpi_polarity ck_pol;
 103         enum mtk_dpi_polarity hsync_pol;
 104         enum mtk_dpi_polarity vsync_pol;
 105 };
 106
 107 struct mtk_dpi_sync_param {
 108         u32 sync_width;
 109         u32 front_porch;
 110         u32 back_porch;
 111         bool shift_half_line;
 112 };
 113
 114 struct mtk_dpi_yc_limit {
 115         u16 y_top;
 116         u16 y_bottom;
 117         u16 c_top;
 118         u16 c_bottom;
 119 };
 120
 121 struct mtk_dpi_conf {
 122         unsigned int (*cal_factor)(int clock);
 123         u32 reg_h_fre_con;
 124         u32 max_clock_khz;
 125         bool edge_sel_en;
 126         const u32 *output_fmts;
 127         u32 num_output_fmts;
 128 };
 129
 130 static void mtk_dpi_mask(struct mtk_dpi *dpi, u32 offset, u32 val, u32 mask)
 131 {
 132         u32 tmp = readl(dpi->regs + offset) & ~mask;
 133
 134         tmp |= (val & mask);
 135         writel(tmp, dpi->regs + offset);
 136 }
 137
 138 static void mtk_dpi_sw_reset(struct mtk_dpi *dpi, bool reset)
 139 {
 140         mtk_dpi_mask(dpi, DPI_RET, reset ? RST : 0, RST);
 141 }
 142
 143 static void mtk_dpi_enable(struct mtk_dpi *dpi)
 144 {
 145         mtk_dpi_mask(dpi, DPI_EN, EN, EN);
 146 }
 147
 148 static void mtk_dpi_disable(struct mtk_dpi *dpi)
 149 {
 150         mtk_dpi_mask(dpi, DPI_EN, 0, EN);
 151 }
 152
 153 static void mtk_dpi_config_hsync(struct mtk_dpi *dpi,
 154                                  struct mtk_dpi_sync_param *sync)
 155 {
 156         mtk_dpi_mask(dpi, DPI_TGEN_HWIDTH,
 157                      sync->sync_width << HPW, HPW_MASK);
 158         mtk_dpi_mask(dpi, DPI_TGEN_HPORCH,
 159                      sync->back_porch << HBP, HBP_MASK);
 160         mtk_dpi_mask(dpi, DPI_TGEN_HPORCH, sync->front_porch << HFP,
 161                      HFP_MASK);
 162 }
 163
 164 static void mtk_dpi_config_vsync(struct mtk_dpi *dpi,
 165                                  struct mtk_dpi_sync_param *sync,
 166                                  u32 width_addr, u32 porch_addr)
 167 {
 168         mtk_dpi_mask(dpi, width_addr,
 169                      sync->sync_width << VSYNC_WIDTH_SHIFT,
 170                      VSYNC_WIDTH_MASK);
 171         mtk_dpi_mask(dpi, width_addr,
 172                      sync->shift_half_line << VSYNC_HALF_LINE_SHIFT,
 173                      VSYNC_HALF_LINE_MASK);
 174         mtk_dpi_mask(dpi, porch_addr,
 175                      sync->back_porch << VSYNC_BACK_PORCH_SHIFT,
 176                      VSYNC_BACK_PORCH_MASK);
 177         mtk_dpi_mask(dpi, porch_addr,
 178                      sync->front_porch << VSYNC_FRONT_PORCH_SHIFT,
 179                      VSYNC_FRONT_PORCH_MASK);
 180 }
 181
 182 static void mtk_dpi_config_vsync_lodd(struct mtk_dpi *dpi,
 183                                       struct mtk_dpi_sync_param *sync)
 184 {
 185         mtk_dpi_config_vsync(dpi, sync, DPI_TGEN_VWIDTH, DPI_TGEN_VPORCH);
 186 }
 187
 188 static void mtk_dpi_config_vsync_leven(struct mtk_dpi *dpi,
 189                                        struct mtk_dpi_sync_param *sync)
 190 {
 191         mtk_dpi_config_vsync(dpi, sync, DPI_TGEN_VWIDTH_LEVEN,
 192                              DPI_TGEN_VPORCH_LEVEN);
 193 }
 194
 195 static void mtk_dpi_config_vsync_rodd(struct mtk_dpi *dpi,
 196                                       struct mtk_dpi_sync_param *sync)
 197 {
 198         mtk_dpi_config_vsync(dpi, sync, DPI_TGEN_VWIDTH_RODD,
 199                              DPI_TGEN_VPORCH_RODD);
 200 }
 201
 202 static void mtk_dpi_config_vsync_reven(struct mtk_dpi *dpi,
 203                                        struct mtk_dpi_sync_param *sync)
 204 {
 205         mtk_dpi_config_vsync(dpi, sync, DPI_TGEN_VWIDTH_REVEN,
 206                              DPI_TGEN_VPORCH_REVEN);
 207 }
 208
 209 static void mtk_dpi_config_pol(struct mtk_dpi *dpi,
 210                                struct mtk_dpi_polarities *dpi_pol)
 211 {
 212         unsigned int pol;
 213
 214         pol = (dpi_pol->ck_pol == MTK_DPI_POLARITY_RISING ? 0 : CK_POL) |
 215               (dpi_pol->de_pol == MTK_DPI_POLARITY_RISING ? 0 : DE_POL) |
 216               (dpi_pol->hsync_pol == MTK_DPI_POLARITY_RISING ? 0 : HSYNC_POL) |
 217               (dpi_pol->vsync_pol == MTK_DPI_POLARITY_RISING ? 0 : VSYNC_POL);
 218         mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, pol,
 219                      CK_POL | DE_POL | HSYNC_POL | VSYNC_POL);
 220 }
 221
 222 static void mtk_dpi_config_3d(struct mtk_dpi *dpi, bool en_3d)
 223 {
 224         mtk_dpi_mask(dpi, DPI_CON, en_3d ? TDFP_EN : 0, TDFP_EN);
 225 }
 226
 227 static void mtk_dpi_config_interface(struct mtk_dpi *dpi, bool inter)
 228 {
 229         mtk_dpi_mask(dpi, DPI_CON, inter ? INTL_EN : 0, INTL_EN);
 230 }
 231
 232 static void mtk_dpi_config_fb_size(struct mtk_dpi *dpi, u32 width, u32 height)
 233 {
 234         mtk_dpi_mask(dpi, DPI_SIZE, width << HSIZE, HSIZE_MASK);
 235         mtk_dpi_mask(dpi, DPI_SIZE, height << VSIZE, VSIZE_MASK);
 236 }
 237
 238 static void mtk_dpi_config_channel_limit(struct mtk_dpi *dpi,
 239                                          struct mtk_dpi_yc_limit *limit)
 240 {
 241         mtk_dpi_mask(dpi, DPI_Y_LIMIT, limit->y_bottom << Y_LIMINT_BOT,
 242                      Y_LIMINT_BOT_MASK);
 243         mtk_dpi_mask(dpi, DPI_Y_LIMIT, limit->y_top << Y_LIMINT_TOP,
 244                      Y_LIMINT_TOP_MASK);
 245         mtk_dpi_mask(dpi, DPI_C_LIMIT, limit->c_bottom << C_LIMIT_BOT,
 246                      C_LIMIT_BOT_MASK);
 247         mtk_dpi_mask(dpi, DPI_C_LIMIT, limit->c_top << C_LIMIT_TOP,
 248                      C_LIMIT_TOP_MASK);
 249 }
 250
 251 static void mtk_dpi_config_bit_num(struct mtk_dpi *dpi,
 252                                    enum mtk_dpi_out_bit_num num)
 253 {
 254         u32 val;
 255
 256         switch (num) {
 257         case MTK_DPI_OUT_BIT_NUM_8BITS:
 258                 val = OUT_BIT_8;
 259                 break;
 260         case MTK_DPI_OUT_BIT_NUM_10BITS:
 261                 val = OUT_BIT_10;
 262                 break;
 263         case MTK_DPI_OUT_BIT_NUM_12BITS:
 264                 val = OUT_BIT_12;
 265                 break;
 266         case MTK_DPI_OUT_BIT_NUM_16BITS:
 267                 val = OUT_BIT_16;
 268                 break;
 269         default:
 270                 val = OUT_BIT_8;
 271                 break;
 272         }
 273         mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, val << OUT_BIT,
 274                      OUT_BIT_MASK);
 275 }
 276
 277 static void mtk_dpi_config_yc_map(struct mtk_dpi *dpi,
 278                                   enum mtk_dpi_out_yc_map map)
 279 {
 280         u32 val;
 281
 282         switch (map) {
 283         case MTK_DPI_OUT_YC_MAP_RGB:
 284                 val = YC_MAP_RGB;
 285                 break;
 286         case MTK_DPI_OUT_YC_MAP_CYCY:
 287                 val = YC_MAP_CYCY;
 288                 break;
 289         case MTK_DPI_OUT_YC_MAP_YCYC:
 290                 val = YC_MAP_YCYC;
 291                 break;
 292         case MTK_DPI_OUT_YC_MAP_CY:
 293                 val = YC_MAP_CY;
 294                 break;
 295         case MTK_DPI_OUT_YC_MAP_YC:
 296                 val = YC_MAP_YC;
 297                 break;
 298         default:
 299                 val = YC_MAP_RGB;
 300                 break;
 301         }
 302
 303         mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, val << YC_MAP, YC_MAP_MASK);
 304 }
 305
 306 static void mtk_dpi_config_channel_swap(struct mtk_dpi *dpi,
 307                                         enum mtk_dpi_out_channel_swap swap)
 308 {
 309         u32 val;
 310
 311         switch (swap) {
 312         case MTK_DPI_OUT_CHANNEL_SWAP_RGB:
 313                 val = SWAP_RGB;
 314                 break;
 315         case MTK_DPI_OUT_CHANNEL_SWAP_GBR:
 316                 val = SWAP_GBR;
 317                 break;
 318         case MTK_DPI_OUT_CHANNEL_SWAP_BRG:
 319                 val = SWAP_BRG;
 320                 break;
 321         case MTK_DPI_OUT_CHANNEL_SWAP_RBG:
 322                 val = SWAP_RBG;
 323                 break;
 324         case MTK_DPI_OUT_CHANNEL_SWAP_GRB:
 325                 val = SWAP_GRB;
 326                 break;
 327         case MTK_DPI_OUT_CHANNEL_SWAP_BGR:
 328                 val = SWAP_BGR;
 329                 break;
 330         default:
 331                 val = SWAP_RGB;
 332                 break;
 333         }
 334
 335         mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, val << CH_SWAP, CH_SWAP_MASK);
 336 }
 337
 338 static void mtk_dpi_config_yuv422_enable(struct mtk_dpi *dpi, bool enable)
 339 {
 340         mtk_dpi_mask(dpi, DPI_CON, enable ? YUV422_EN : 0, YUV422_EN);
 341 }
 342
 343 static void mtk_dpi_config_csc_enable(struct mtk_dpi *dpi, bool enable)
 344 {
 345         mtk_dpi_mask(dpi, DPI_CON, enable ? CSC_ENABLE : 0, CSC_ENABLE);
 346 }
 347
 348 static void mtk_dpi_config_swap_input(struct mtk_dpi *dpi, bool enable)
 349 {
 350         mtk_dpi_mask(dpi, DPI_CON, enable ? IN_RB_SWAP : 0, IN_RB_SWAP);
 351 }
 352
 353 static void mtk_dpi_config_2n_h_fre(struct mtk_dpi *dpi)
 354 {
 355         mtk_dpi_mask(dpi, dpi->conf->reg_h_fre_con, H_FRE_2N, H_FRE_2N);
 356 }
 357
 358 static void mtk_dpi_config_disable_edge(struct mtk_dpi *dpi)
 359 {
 360         if (dpi->conf->edge_sel_en)
 361                 mtk_dpi_mask(dpi, dpi->conf->reg_h_fre_con, 0, EDGE_SEL_EN);
 362 }
 363
 364 static void mtk_dpi_config_color_format(struct mtk_dpi *dpi,
 365                                         enum mtk_dpi_out_color_format format)
 366 {
 367         if ((format == MTK_DPI_COLOR_FORMAT_YCBCR_444) ||
 368             (format == MTK_DPI_COLOR_FORMAT_YCBCR_444_FULL)) {
 369                 mtk_dpi_config_yuv422_enable(dpi, false);
 370                 mtk_dpi_config_csc_enable(dpi, true);
 371                 mtk_dpi_config_swap_input(dpi, false);
 372                 mtk_dpi_config_channel_swap(dpi, MTK_DPI_OUT_CHANNEL_SWAP_BGR);
 373         } else if ((format == MTK_DPI_COLOR_FORMAT_YCBCR_422) ||
 374                    (format == MTK_DPI_COLOR_FORMAT_YCBCR_422_FULL)) {
 375                 mtk_dpi_config_yuv422_enable(dpi, true);
 376                 mtk_dpi_config_csc_enable(dpi, true);
 377                 mtk_dpi_config_swap_input(dpi, true);
 378                 mtk_dpi_config_channel_swap(dpi, MTK_DPI_OUT_CHANNEL_SWAP_RGB);
 379         } else {
 380                 mtk_dpi_config_yuv422_enable(dpi, false);
 381                 mtk_dpi_config_csc_enable(dpi, false);
 382                 mtk_dpi_config_swap_input(dpi, false);
 383                 mtk_dpi_config_channel_swap(dpi, MTK_DPI_OUT_CHANNEL_SWAP_RGB);
 384         }
 385 }
 386
 387 static void mtk_dpi_dual_edge(struct mtk_dpi *dpi)
 388 {
 389         if ((dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_LE) ||
 390             (dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_BE)) {
 391                 mtk_dpi_mask(dpi, DPI_DDR_SETTING, DDR_EN | DDR_4PHASE,
 392                              DDR_EN | DDR_4PHASE);
 393                 mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING,
 394                              dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_LE ?
 395                              EDGE_SEL : 0, EDGE_SEL);
 396         } else {
 397                 mtk_dpi_mask(dpi, DPI_DDR_SETTING, DDR_EN | DDR_4PHASE, 0);
 398         }
 399 }
 400
 401 static void mtk_dpi_power_off(struct mtk_dpi *dpi)
 402 {
 403         if (WARN_ON(dpi->refcount == 0))
 404                 return;
 405
 406         if (--dpi->refcount != 0)
 407                 return;
 408
 409         if (dpi->pinctrl && dpi->pins_gpio)
 410                 pinctrl_select_state(dpi->pinctrl, dpi->pins_gpio);
 411
 412         mtk_dpi_disable(dpi);
 413         clk_disable_unprepare(dpi->pixel_clk);
 414         clk_disable_unprepare(dpi->engine_clk);
 415 }
 416
 417 static int mtk_dpi_power_on(struct mtk_dpi *dpi)
 418 {
 419         int ret;
 420
 421         if (++dpi->refcount != 1)
 422                 return 0;
 423
 424         ret = clk_prepare_enable(dpi->engine_clk);
 425         if (ret) {
 426                 dev_err(dpi->dev, "Failed to enable engine clock: %d\n", ret);
 427                 goto err_refcount;
 428         }
 429
 430         ret = clk_prepare_enable(dpi->pixel_clk);
 431         if (ret) {
 432                 dev_err(dpi->dev, "Failed to enable pixel clock: %d\n", ret);
 433                 goto err_pixel;
 434         }
 435
 436         if (dpi->pinctrl && dpi->pins_dpi)
 437                 pinctrl_select_state(dpi->pinctrl, dpi->pins_dpi);
 438
 439         mtk_dpi_enable(dpi);
 440         return 0;
 441
 442 err_pixel:
 443         clk_disable_unprepare(dpi->engine_clk);
 444 err_refcount:
 445         dpi->refcount--;
 446         return ret;
 447 }
 448
 449 static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,
 450                                     struct drm_display_mode *mode)
 451 {
 452         struct mtk_dpi_yc_limit limit;
 453         struct mtk_dpi_polarities dpi_pol;
 454         struct mtk_dpi_sync_param hsync;
 455         struct mtk_dpi_sync_param vsync_lodd = { 0 };
 456         struct mtk_dpi_sync_param vsync_leven = { 0 };
 457         struct mtk_dpi_sync_param vsync_rodd = { 0 };
 458         struct mtk_dpi_sync_param vsync_reven = { 0 };
 459         struct videomode vm = { 0 };
 460         unsigned long pll_rate;
 461         unsigned int factor;
 462
 463         /* let pll_rate can fix the valid range of tvdpll (1G~2GHz) */
 464         factor = dpi->conf->cal_factor(mode->clock);
 465         drm_display_mode_to_videomode(mode, &vm);
 466         pll_rate = vm.pixelclock * factor;
 467
 468         dev_dbg(dpi->dev, "Want PLL %lu Hz, pixel clock %lu Hz\n",
 469                 pll_rate, vm.pixelclock);
 470
 471         clk_set_rate(dpi->tvd_clk, pll_rate);
 472         pll_rate = clk_get_rate(dpi->tvd_clk);
 473
 474         vm.pixelclock = pll_rate / factor;
 475         if ((dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_LE) ||
 476             (dpi->output_fmt == MEDIA_BUS_FMT_RGB888_2X12_BE))
 477                 clk_set_rate(dpi->pixel_clk, vm.pixelclock * 2);
 478         else
 479                 clk_set_rate(dpi->pixel_clk, vm.pixelclock);
 480
 481
 482         vm.pixelclock = clk_get_rate(dpi->pixel_clk);
 483
 484         dev_dbg(dpi->dev, "Got  PLL %lu Hz, pixel clock %lu Hz\n",
 485                 pll_rate, vm.pixelclock);
 486
 487         limit.c_bottom = 0x0010;
 488         limit.c_top = 0x0FE0;
 489         limit.y_bottom = 0x0010;
 490         limit.y_top = 0x0FE0;
 491
 492         dpi_pol.ck_pol = MTK_DPI_POLARITY_FALLING;
 493         dpi_pol.de_pol = MTK_DPI_POLARITY_RISING;
 494         dpi_pol.hsync_pol = vm.flags & DISPLAY_FLAGS_HSYNC_HIGH ?
 495                             MTK_DPI_POLARITY_FALLING : MTK_DPI_POLARITY_RISING;
 496         dpi_pol.vsync_pol = vm.flags & DISPLAY_FLAGS_VSYNC_HIGH ?
 497                             MTK_DPI_POLARITY_FALLING : MTK_DPI_POLARITY_RISING;
 498         hsync.sync_width = vm.hsync_len;
 499         hsync.back_porch = vm.hback_porch;
 500         hsync.front_porch = vm.hfront_porch;
 501         hsync.shift_half_line = false;
 502         vsync_lodd.sync_width = vm.vsync_len;
 503         vsync_lodd.back_porch = vm.vback_porch;
 504         vsync_lodd.front_porch = vm.vfront_porch;
 505         vsync_lodd.shift_half_line = false;
 506
 507         if (vm.flags & DISPLAY_FLAGS_INTERLACED &&
 508             mode->flags & DRM_MODE_FLAG_3D_MASK) {
 509                 vsync_leven = vsync_lodd;
 510                 vsync_rodd = vsync_lodd;
 511                 vsync_reven = vsync_lodd;
 512                 vsync_leven.shift_half_line = true;
 513                 vsync_reven.shift_half_line = true;
 514         } else if (vm.flags & DISPLAY_FLAGS_INTERLACED &&
 515                    !(mode->flags & DRM_MODE_FLAG_3D_MASK)) {
 516                 vsync_leven = vsync_lodd;
 517                 vsync_leven.shift_half_line = true;
 518         } else if (!(vm.flags & DISPLAY_FLAGS_INTERLACED) &&
 519                    mode->flags & DRM_MODE_FLAG_3D_MASK) {
 520                 vsync_rodd = vsync_lodd;
 521         }
 522         mtk_dpi_sw_reset(dpi, true);
 523         mtk_dpi_config_pol(dpi, &dpi_pol);
 524
 525         mtk_dpi_config_hsync(dpi, &hsync);
 526         mtk_dpi_config_vsync_lodd(dpi, &vsync_lodd);
 527         mtk_dpi_config_vsync_rodd(dpi, &vsync_rodd);
 528         mtk_dpi_config_vsync_leven(dpi, &vsync_leven);
 529         mtk_dpi_config_vsync_reven(dpi, &vsync_reven);
 530
 531         mtk_dpi_config_3d(dpi, !!(mode->flags & DRM_MODE_FLAG_3D_MASK));
 532         mtk_dpi_config_interface(dpi, !!(vm.flags &
 533                                          DISPLAY_FLAGS_INTERLACED));
 534         if (vm.flags & DISPLAY_FLAGS_INTERLACED)
 535                 mtk_dpi_config_fb_size(dpi, vm.hactive, vm.vactive >> 1);
 536         else
 537                 mtk_dpi_config_fb_size(dpi, vm.hactive, vm.vactive);
 538
 539         mtk_dpi_config_channel_limit(dpi, &limit);
 540         mtk_dpi_config_bit_num(dpi, dpi->bit_num);
 541         mtk_dpi_config_channel_swap(dpi, dpi->channel_swap);
 542         mtk_dpi_config_yc_map(dpi, dpi->yc_map);
 543         mtk_dpi_config_color_format(dpi, dpi->color_format);
 544         mtk_dpi_config_2n_h_fre(dpi);
 545         mtk_dpi_dual_edge(dpi);
 546         mtk_dpi_config_disable_edge(dpi);
 547         mtk_dpi_sw_reset(dpi, false);
 548
 549         return 0;
 550 }
 551
 552 static u32 *mtk_dpi_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
 553                                                       struct drm_bridge_state *bridge_state,
 554                                                       struct drm_crtc_state *crtc_state,
 555                                                       struct drm_connector_state *conn_state,
 556                                                       unsigned int *num_output_fmts)
 557 {
 558         struct mtk_dpi *dpi = bridge_to_dpi(bridge);
 559         u32 *output_fmts;
 560
 561         *num_output_fmts = 0;
 562
 563         if (!dpi->conf->output_fmts) {
 564                 dev_err(dpi->dev, "output_fmts should not be null\n");
 565                 return NULL;
 566         }
 567
 568         output_fmts = kcalloc(dpi->conf->num_output_fmts, sizeof(*output_fmts),
 569                              GFP_KERNEL);
 570         if (!output_fmts)
 571                 return NULL;
 572
 573         *num_output_fmts = dpi->conf->num_output_fmts;
 574
 575         memcpy(output_fmts, dpi->conf->output_fmts,
 576                sizeof(*output_fmts) * dpi->conf->num_output_fmts);
 577
 578         return output_fmts;
 579 }
 580
 581 static u32 *mtk_dpi_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
 582                                                      struct drm_bridge_state *bridge_state,
 583                                                      struct drm_crtc_state *crtc_state,
 584                                                      struct drm_connector_state *conn_state,
 585                                                      u32 output_fmt,
 586                                                      unsigned int *num_input_fmts)
 587 {
 588         u32 *input_fmts;
 589
 590         *num_input_fmts = 0;
 591
 592         input_fmts = kcalloc(1, sizeof(*input_fmts),
 593                              GFP_KERNEL);
 594         if (!input_fmts)
 595                 return NULL;
 596
 597         *num_input_fmts = 1;
 598         input_fmts[0] = MEDIA_BUS_FMT_RGB888_1X24;
 599
 600         return input_fmts;
 601 }
 602
 603 static int mtk_dpi_bridge_atomic_check(struct drm_bridge *bridge,
 604                                        struct drm_bridge_state *bridge_state,
 605                                        struct drm_crtc_state *crtc_state,
 606                                        struct drm_connector_state *conn_state)
 607 {
 608         struct mtk_dpi *dpi = bridge->driver_private;
 609         unsigned int out_bus_format;
 610
 611         out_bus_format = bridge_state->output_bus_cfg.format;
 612
 613         dev_dbg(dpi->dev, "input format 0x%04x, output format 0x%04x\n",
 614                 bridge_state->input_bus_cfg.format,
 615                 bridge_state->output_bus_cfg.format);
 616
 617         dpi->output_fmt = out_bus_format;
 618         dpi->bit_num = MTK_DPI_OUT_BIT_NUM_8BITS;
 619         dpi->channel_swap = MTK_DPI_OUT_CHANNEL_SWAP_RGB;
 620         dpi->yc_map = MTK_DPI_OUT_YC_MAP_RGB;
 621         dpi->color_format = MTK_DPI_COLOR_FORMAT_RGB;
 622
 623         return 0;
 624 }
 625
 626 static int mtk_dpi_bridge_attach(struct drm_bridge *bridge,
 627                                  enum drm_bridge_attach_flags flags)
 628 {
 629         struct mtk_dpi *dpi = bridge_to_dpi(bridge);
 630
 631         return drm_bridge_attach(bridge->encoder, dpi->next_bridge,
 632                                  &dpi->bridge, flags);
 633 }
 634
 635 static void mtk_dpi_bridge_mode_set(struct drm_bridge *bridge,
 636                                 const struct drm_display_mode *mode,
 637                                 const struct drm_display_mode *adjusted_mode)
 638 {
 639         struct mtk_dpi *dpi = bridge_to_dpi(bridge);
 640
 641         drm_mode_copy(&dpi->mode, adjusted_mode);
 642 }
 643
 644 static void mtk_dpi_bridge_disable(struct drm_bridge *bridge)
 645 {
 646         struct mtk_dpi *dpi = bridge_to_dpi(bridge);
 647
 648         mtk_dpi_power_off(dpi);
 649 }
 650
 651 static void mtk_dpi_bridge_enable(struct drm_bridge *bridge)
 652 {
 653         struct mtk_dpi *dpi = bridge_to_dpi(bridge);
 654
 655         mtk_dpi_power_on(dpi);
 656         mtk_dpi_set_display_mode(dpi, &dpi->mode);
 657 }
 658
 659 static enum drm_mode_status
 660 mtk_dpi_bridge_mode_valid(struct drm_bridge *bridge,
 661                           const struct drm_display_info *info,
 662                           const struct drm_display_mode *mode)
 663 {
 664         struct mtk_dpi *dpi = bridge_to_dpi(bridge);
 665
 666         if (mode->clock > dpi->conf->max_clock_khz)
 667                 return MODE_CLOCK_HIGH;
 668
 669         return MODE_OK;
 670 }
 671
 672 static const struct drm_bridge_funcs mtk_dpi_bridge_funcs = {
 673         .attach = mtk_dpi_bridge_attach,
 674         .mode_set = mtk_dpi_bridge_mode_set,
 675         .mode_valid = mtk_dpi_bridge_mode_valid,
 676         .disable = mtk_dpi_bridge_disable,
 677         .enable = mtk_dpi_bridge_enable,
 678         .atomic_check = mtk_dpi_bridge_atomic_check,
 679         .atomic_get_output_bus_fmts = mtk_dpi_bridge_atomic_get_output_bus_fmts,
 680         .atomic_get_input_bus_fmts = mtk_dpi_bridge_atomic_get_input_bus_fmts,
 681         .atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
 682         .atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
 683         .atomic_reset = drm_atomic_helper_bridge_reset,
 684 };
 685
 686 void mtk_dpi_start(struct device *dev)
 687 {
 688         struct mtk_dpi *dpi = dev_get_drvdata(dev);
 689
 690         mtk_dpi_power_on(dpi);
 691 }
 692
 693 void mtk_dpi_stop(struct device *dev)
 694 {
 695         struct mtk_dpi *dpi = dev_get_drvdata(dev);
 696
 697         mtk_dpi_power_off(dpi);
 698 }
 699
 700 static int mtk_dpi_bind(struct device *dev, struct device *master, void *data)
 701 {
 702         struct mtk_dpi *dpi = dev_get_drvdata(dev);
 703         struct drm_device *drm_dev = data;
 704         int ret;
 705
 706         ret = drm_simple_encoder_init(drm_dev, &dpi->encoder,
 707                                       DRM_MODE_ENCODER_TMDS);
 708         if (ret) {
 709                 dev_err(dev, "Failed to initialize decoder: %d\n", ret);
 710                 return ret;
 711         }
 712
 713         dpi->encoder.possible_crtcs = mtk_drm_find_possible_crtc_by_comp(drm_dev, dpi->dev);
 714
 715         ret = drm_bridge_attach(&dpi->encoder, &dpi->bridge, NULL,
 716                                 DRM_BRIDGE_ATTACH_NO_CONNECTOR);
 717         if (ret) {
 718                 dev_err(dev, "Failed to attach bridge: %d\n", ret);
 719                 goto err_cleanup;
 720         }
 721
 722         dpi->connector = drm_bridge_connector_init(drm_dev, &dpi->encoder);
 723         if (IS_ERR(dpi->connector)) {
 724                 dev_err(dev, "Unable to create bridge connector\n");
 725                 ret = PTR_ERR(dpi->connector);
 726                 goto err_cleanup;
 727         }
 728         drm_connector_attach_encoder(dpi->connector, &dpi->encoder);
 729
 730         return 0;
 731
 732 err_cleanup:
 733         drm_encoder_cleanup(&dpi->encoder);
 734         return ret;
 735 }
 736
 737 static void mtk_dpi_unbind(struct device *dev, struct device *master,
 738                            void *data)
 739 {
 740         struct mtk_dpi *dpi = dev_get_drvdata(dev);
 741
 742         drm_encoder_cleanup(&dpi->encoder);
 743 }
 744
 745 static const struct component_ops mtk_dpi_component_ops = {
 746         .bind = mtk_dpi_bind,
 747         .unbind = mtk_dpi_unbind,
 748 };
 749
 750 static unsigned int mt8173_calculate_factor(int clock)
 751 {
 752         if (clock <= 27000)
 753                 return 3 << 4;
 754         else if (clock <= 84000)
 755                 return 3 << 3;
 756         else if (clock <= 167000)
 757                 return 3 << 2;
 758         else
 759                 return 3 << 1;
 760 }
 761
 762 static unsigned int mt2701_calculate_factor(int clock)
 763 {
 764         if (clock <= 64000)
 765                 return 4;
 766         else if (clock <= 128000)
 767                 return 2;
 768         else
 769                 return 1;
 770 }
 771
 772 static unsigned int mt8183_calculate_factor(int clock)
 773 {
 774         if (clock <= 27000)
 775                 return 8;
 776         else if (clock <= 167000)
 777                 return 4;
 778         else
 779                 return 2;
 780 }
 781
 782 static const u32 mt8173_output_fmts[] = {
 783         MEDIA_BUS_FMT_RGB888_1X24,
 784 };
 785
 786 static const u32 mt8183_output_fmts[] = {
 787         MEDIA_BUS_FMT_RGB888_2X12_LE,
 788         MEDIA_BUS_FMT_RGB888_2X12_BE,
 789 };
 790
 791 static const struct mtk_dpi_conf mt8173_conf = {
 792         .cal_factor = mt8173_calculate_factor,
 793         .reg_h_fre_con = 0xe0,
 794         .max_clock_khz = 300000,
 795         .output_fmts = mt8173_output_fmts,
 796         .num_output_fmts = ARRAY_SIZE(mt8173_output_fmts),
 797 };
 798
 799 static const struct mtk_dpi_conf mt2701_conf = {
 800         .cal_factor = mt2701_calculate_factor,
 801         .reg_h_fre_con = 0xb0,
 802         .edge_sel_en = true,
 803         .max_clock_khz = 150000,
 804         .output_fmts = mt8173_output_fmts,
 805         .num_output_fmts = ARRAY_SIZE(mt8173_output_fmts),
 806 };
 807
 808 static const struct mtk_dpi_conf mt8183_conf = {
 809         .cal_factor = mt8183_calculate_factor,
 810         .reg_h_fre_con = 0xe0,
 811         .max_clock_khz = 100000,
 812         .output_fmts = mt8183_output_fmts,
 813         .num_output_fmts = ARRAY_SIZE(mt8183_output_fmts),
 814 };
 815
 816 static const struct mtk_dpi_conf mt8192_conf = {
 817         .cal_factor = mt8183_calculate_factor,
 818         .reg_h_fre_con = 0xe0,
 819         .max_clock_khz = 150000,
 820         .output_fmts = mt8173_output_fmts,
 821         .num_output_fmts = ARRAY_SIZE(mt8173_output_fmts),
 822 };
 823
 824 static int mtk_dpi_probe(struct platform_device *pdev)
 825 {
 826         struct device *dev = &pdev->dev;
 827         struct mtk_dpi *dpi;
 828         struct resource *mem;
 829         int ret;
 830
 831         dpi = devm_kzalloc(dev, sizeof(*dpi), GFP_KERNEL);
 832         if (!dpi)
 833                 return -ENOMEM;
 834
 835         dpi->dev = dev;
 836         dpi->conf = (struct mtk_dpi_conf *)of_device_get_match_data(dev);
 837         dpi->output_fmt = MEDIA_BUS_FMT_RGB888_1X24;
 838
 839         dpi->pinctrl = devm_pinctrl_get(&pdev->dev);
 840         if (IS_ERR(dpi->pinctrl)) {
 841                 dpi->pinctrl = NULL;
 842                 dev_dbg(&pdev->dev, "Cannot find pinctrl!\n");
 843         }
 844         if (dpi->pinctrl) {
 845                 dpi->pins_gpio = pinctrl_lookup_state(dpi->pinctrl, "sleep");
 846                 if (IS_ERR(dpi->pins_gpio)) {
 847                         dpi->pins_gpio = NULL;
 848                         dev_dbg(&pdev->dev, "Cannot find pinctrl idle!\n");
 849                 }
 850                 if (dpi->pins_gpio)
 851                         pinctrl_select_state(dpi->pinctrl, dpi->pins_gpio);
 852
 853                 dpi->pins_dpi = pinctrl_lookup_state(dpi->pinctrl, "default");
 854                 if (IS_ERR(dpi->pins_dpi)) {
 855                         dpi->pins_dpi = NULL;
 856                         dev_dbg(&pdev->dev, "Cannot find pinctrl active!\n");
 857                 }
 858         }
 859         mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 860         dpi->regs = devm_ioremap_resource(dev, mem);
 861         if (IS_ERR(dpi->regs)) {
 862                 ret = PTR_ERR(dpi->regs);
 863                 dev_err(dev, "Failed to ioremap mem resource: %d\n", ret);
 864                 return ret;
 865         }
 866
 867         dpi->engine_clk = devm_clk_get(dev, "engine");
 868         if (IS_ERR(dpi->engine_clk)) {
 869                 ret = PTR_ERR(dpi->engine_clk);
 870                 if (ret != -EPROBE_DEFER)
 871                         dev_err(dev, "Failed to get engine clock: %d\n", ret);
 872
 873                 return ret;
 874         }
 875
 876         dpi->pixel_clk = devm_clk_get(dev, "pixel");
 877         if (IS_ERR(dpi->pixel_clk)) {
 878                 ret = PTR_ERR(dpi->pixel_clk);
 879                 if (ret != -EPROBE_DEFER)
 880                         dev_err(dev, "Failed to get pixel clock: %d\n", ret);
 881
 882                 return ret;
 883         }
 884
 885         dpi->tvd_clk = devm_clk_get(dev, "pll");
 886         if (IS_ERR(dpi->tvd_clk)) {
 887                 ret = PTR_ERR(dpi->tvd_clk);
 888                 if (ret != -EPROBE_DEFER)
 889                         dev_err(dev, "Failed to get tvdpll clock: %d\n", ret);
 890
 891                 return ret;
 892         }
 893
 894         dpi->irq = platform_get_irq(pdev, 0);
 895         if (dpi->irq <= 0)
 896                 return -EINVAL;
 897
 898         ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0,
 899                                           NULL, &dpi->next_bridge);
 900         if (ret)
 901                 return ret;
 902
 903         dev_info(dev, "Found bridge node: %pOF\n", dpi->next_bridge->of_node);
 904
 905         platform_set_drvdata(pdev, dpi);
 906
 907         dpi->bridge.funcs = &mtk_dpi_bridge_funcs;
 908         dpi->bridge.of_node = dev->of_node;
 909         dpi->bridge.type = DRM_MODE_CONNECTOR_DPI;
 910
 911         drm_bridge_add(&dpi->bridge);
 912
 913         ret = component_add(dev, &mtk_dpi_component_ops);
 914         if (ret) {
 915                 drm_bridge_remove(&dpi->bridge);
 916                 dev_err(dev, "Failed to add component: %d\n", ret);
 917                 return ret;
 918         }
 919
 920         return 0;
 921 }
 922
 923 static int mtk_dpi_remove(struct platform_device *pdev)
 924 {
 925         struct mtk_dpi *dpi = platform_get_drvdata(pdev);
 926
 927         component_del(&pdev->dev, &mtk_dpi_component_ops);
 928         drm_bridge_remove(&dpi->bridge);
 929
 930         return 0;
 931 }
 932
 933 static const struct of_device_id mtk_dpi_of_ids[] = {
 934         { .compatible = "mediatek,mt2701-dpi",
 935           .data = &mt2701_conf,
 936         },
 937         { .compatible = "mediatek,mt8173-dpi",
 938           .data = &mt8173_conf,
 939         },
 940         { .compatible = "mediatek,mt8183-dpi",
 941           .data = &mt8183_conf,
 942         },
 943         { .compatible = "mediatek,mt8192-dpi",
 944           .data = &mt8192_conf,
 945         },
 946         { },
 947 };
 948 MODULE_DEVICE_TABLE(of, mtk_dpi_of_ids);
 949
 950 struct platform_driver mtk_dpi_driver = {
 951         .probe = mtk_dpi_probe,
 952         .remove = mtk_dpi_remove,
 953         .driver = {
 954                 .name = "mediatek-dpi",
 955                 .of_match_table = mtk_dpi_of_ids,
 956         },
 957 };