drivers/gpu/drm/mediatek/mtk_dpi.c

   1 /*
   2  * Copyright (c) 2014 MediaTek Inc.
   3  * Author: Jie Qiu <jie.qiu@mediatek.com>
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 as
   7  * published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14 #include <drm/drmP.h>
  15 #include <drm/drm_crtc.h>
  16 #include <drm/drm_atomic_helper.h>
  17 #include <drm/drm_of.h>
  18 #include <linux/kernel.h>
  19 #include <linux/component.h>
  20 #include <linux/platform_device.h>
  21 #include <linux/of.h>
  22 #include <linux/of_device.h>
  23 #include <linux/of_graph.h>
  24 #include <linux/interrupt.h>
  25 #include <linux/types.h>
  26 #include <linux/clk.h>
  27 #include <video/videomode.h>
  28
  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 mtk_ddp_comp ddp_comp;
  68         struct drm_encoder encoder;
  69         struct drm_bridge *bridge;
  70         void __iomem *regs;
  71         struct device *dev;
  72         struct clk *engine_clk;
  73         struct clk *pixel_clk;
  74         struct clk *tvd_clk;
  75         int irq;
  76         struct drm_display_mode mode;
  77         const struct mtk_dpi_conf *conf;
  78         enum mtk_dpi_out_color_format color_format;
  79         enum mtk_dpi_out_yc_map yc_map;
  80         enum mtk_dpi_out_bit_num bit_num;
  81         enum mtk_dpi_out_channel_swap channel_swap;
  82         int refcount;
  83 };
  84
  85 static inline struct mtk_dpi *mtk_dpi_from_encoder(struct drm_encoder *e)
  86 {
  87         return container_of(e, struct mtk_dpi, encoder);
  88 }
  89
  90 enum mtk_dpi_polarity {
  91         MTK_DPI_POLARITY_RISING,
  92         MTK_DPI_POLARITY_FALLING,
  93 };
  94
  95 struct mtk_dpi_polarities {
  96         enum mtk_dpi_polarity de_pol;
  97         enum mtk_dpi_polarity ck_pol;
  98         enum mtk_dpi_polarity hsync_pol;
  99         enum mtk_dpi_polarity vsync_pol;
 100 };
 101
 102 struct mtk_dpi_sync_param {
 103         u32 sync_width;
 104         u32 front_porch;
 105         u32 back_porch;
 106         bool shift_half_line;
 107 };
 108
 109 struct mtk_dpi_yc_limit {
 110         u16 y_top;
 111         u16 y_bottom;
 112         u16 c_top;
 113         u16 c_bottom;
 114 };
 115
 116 struct mtk_dpi_conf {
 117         unsigned int (*cal_factor)(int clock);
 118         u32 reg_h_fre_con;
 119         bool edge_sel_en;
 120 };
 121
 122 static void mtk_dpi_mask(struct mtk_dpi *dpi, u32 offset, u32 val, u32 mask)
 123 {
 124         u32 tmp = readl(dpi->regs + offset) & ~mask;
 125
 126         tmp |= (val & mask);
 127         writel(tmp, dpi->regs + offset);
 128 }
 129
 130 static void mtk_dpi_sw_reset(struct mtk_dpi *dpi, bool reset)
 131 {
 132         mtk_dpi_mask(dpi, DPI_RET, reset ? RST : 0, RST);
 133 }
 134
 135 static void mtk_dpi_enable(struct mtk_dpi *dpi)
 136 {
 137         mtk_dpi_mask(dpi, DPI_EN, EN, EN);
 138 }
 139
 140 static void mtk_dpi_disable(struct mtk_dpi *dpi)
 141 {
 142         mtk_dpi_mask(dpi, DPI_EN, 0, EN);
 143 }
 144
 145 static void mtk_dpi_config_hsync(struct mtk_dpi *dpi,
 146                                  struct mtk_dpi_sync_param *sync)
 147 {
 148         mtk_dpi_mask(dpi, DPI_TGEN_HWIDTH,
 149                      sync->sync_width << HPW, HPW_MASK);
 150         mtk_dpi_mask(dpi, DPI_TGEN_HPORCH,
 151                      sync->back_porch << HBP, HBP_MASK);
 152         mtk_dpi_mask(dpi, DPI_TGEN_HPORCH, sync->front_porch << HFP,
 153                      HFP_MASK);
 154 }
 155
 156 static void mtk_dpi_config_vsync(struct mtk_dpi *dpi,
 157                                  struct mtk_dpi_sync_param *sync,
 158                                  u32 width_addr, u32 porch_addr)
 159 {
 160         mtk_dpi_mask(dpi, width_addr,
 161                      sync->sync_width << VSYNC_WIDTH_SHIFT,
 162                      VSYNC_WIDTH_MASK);
 163         mtk_dpi_mask(dpi, width_addr,
 164                      sync->shift_half_line << VSYNC_HALF_LINE_SHIFT,
 165                      VSYNC_HALF_LINE_MASK);
 166         mtk_dpi_mask(dpi, porch_addr,
 167                      sync->back_porch << VSYNC_BACK_PORCH_SHIFT,
 168                      VSYNC_BACK_PORCH_MASK);
 169         mtk_dpi_mask(dpi, porch_addr,
 170                      sync->front_porch << VSYNC_FRONT_PORCH_SHIFT,
 171                      VSYNC_FRONT_PORCH_MASK);
 172 }
 173
 174 static void mtk_dpi_config_vsync_lodd(struct mtk_dpi *dpi,
 175                                       struct mtk_dpi_sync_param *sync)
 176 {
 177         mtk_dpi_config_vsync(dpi, sync, DPI_TGEN_VWIDTH, DPI_TGEN_VPORCH);
 178 }
 179
 180 static void mtk_dpi_config_vsync_leven(struct mtk_dpi *dpi,
 181                                        struct mtk_dpi_sync_param *sync)
 182 {
 183         mtk_dpi_config_vsync(dpi, sync, DPI_TGEN_VWIDTH_LEVEN,
 184                              DPI_TGEN_VPORCH_LEVEN);
 185 }
 186
 187 static void mtk_dpi_config_vsync_rodd(struct mtk_dpi *dpi,
 188                                       struct mtk_dpi_sync_param *sync)
 189 {
 190         mtk_dpi_config_vsync(dpi, sync, DPI_TGEN_VWIDTH_RODD,
 191                              DPI_TGEN_VPORCH_RODD);
 192 }
 193
 194 static void mtk_dpi_config_vsync_reven(struct mtk_dpi *dpi,
 195                                        struct mtk_dpi_sync_param *sync)
 196 {
 197         mtk_dpi_config_vsync(dpi, sync, DPI_TGEN_VWIDTH_REVEN,
 198                              DPI_TGEN_VPORCH_REVEN);
 199 }
 200
 201 static void mtk_dpi_config_pol(struct mtk_dpi *dpi,
 202                                struct mtk_dpi_polarities *dpi_pol)
 203 {
 204         unsigned int pol;
 205
 206         pol = (dpi_pol->ck_pol == MTK_DPI_POLARITY_RISING ? 0 : CK_POL) |
 207               (dpi_pol->de_pol == MTK_DPI_POLARITY_RISING ? 0 : DE_POL) |
 208               (dpi_pol->hsync_pol == MTK_DPI_POLARITY_RISING ? 0 : HSYNC_POL) |
 209               (dpi_pol->vsync_pol == MTK_DPI_POLARITY_RISING ? 0 : VSYNC_POL);
 210         mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, pol,
 211                      CK_POL | DE_POL | HSYNC_POL | VSYNC_POL);
 212 }
 213
 214 static void mtk_dpi_config_3d(struct mtk_dpi *dpi, bool en_3d)
 215 {
 216         mtk_dpi_mask(dpi, DPI_CON, en_3d ? TDFP_EN : 0, TDFP_EN);
 217 }
 218
 219 static void mtk_dpi_config_interface(struct mtk_dpi *dpi, bool inter)
 220 {
 221         mtk_dpi_mask(dpi, DPI_CON, inter ? INTL_EN : 0, INTL_EN);
 222 }
 223
 224 static void mtk_dpi_config_fb_size(struct mtk_dpi *dpi, u32 width, u32 height)
 225 {
 226         mtk_dpi_mask(dpi, DPI_SIZE, width << HSIZE, HSIZE_MASK);
 227         mtk_dpi_mask(dpi, DPI_SIZE, height << VSIZE, VSIZE_MASK);
 228 }
 229
 230 static void mtk_dpi_config_channel_limit(struct mtk_dpi *dpi,
 231                                          struct mtk_dpi_yc_limit *limit)
 232 {
 233         mtk_dpi_mask(dpi, DPI_Y_LIMIT, limit->y_bottom << Y_LIMINT_BOT,
 234                      Y_LIMINT_BOT_MASK);
 235         mtk_dpi_mask(dpi, DPI_Y_LIMIT, limit->y_top << Y_LIMINT_TOP,
 236                      Y_LIMINT_TOP_MASK);
 237         mtk_dpi_mask(dpi, DPI_C_LIMIT, limit->c_bottom << C_LIMIT_BOT,
 238                      C_LIMIT_BOT_MASK);
 239         mtk_dpi_mask(dpi, DPI_C_LIMIT, limit->c_top << C_LIMIT_TOP,
 240                      C_LIMIT_TOP_MASK);
 241 }
 242
 243 static void mtk_dpi_config_bit_num(struct mtk_dpi *dpi,
 244                                    enum mtk_dpi_out_bit_num num)
 245 {
 246         u32 val;
 247
 248         switch (num) {
 249         case MTK_DPI_OUT_BIT_NUM_8BITS:
 250                 val = OUT_BIT_8;
 251                 break;
 252         case MTK_DPI_OUT_BIT_NUM_10BITS:
 253                 val = OUT_BIT_10;
 254                 break;
 255         case MTK_DPI_OUT_BIT_NUM_12BITS:
 256                 val = OUT_BIT_12;
 257                 break;
 258         case MTK_DPI_OUT_BIT_NUM_16BITS:
 259                 val = OUT_BIT_16;
 260                 break;
 261         default:
 262                 val = OUT_BIT_8;
 263                 break;
 264         }
 265         mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, val << OUT_BIT,
 266                      OUT_BIT_MASK);
 267 }
 268
 269 static void mtk_dpi_config_yc_map(struct mtk_dpi *dpi,
 270                                   enum mtk_dpi_out_yc_map map)
 271 {
 272         u32 val;
 273
 274         switch (map) {
 275         case MTK_DPI_OUT_YC_MAP_RGB:
 276                 val = YC_MAP_RGB;
 277                 break;
 278         case MTK_DPI_OUT_YC_MAP_CYCY:
 279                 val = YC_MAP_CYCY;
 280                 break;
 281         case MTK_DPI_OUT_YC_MAP_YCYC:
 282                 val = YC_MAP_YCYC;
 283                 break;
 284         case MTK_DPI_OUT_YC_MAP_CY:
 285                 val = YC_MAP_CY;
 286                 break;
 287         case MTK_DPI_OUT_YC_MAP_YC:
 288                 val = YC_MAP_YC;
 289                 break;
 290         default:
 291                 val = YC_MAP_RGB;
 292                 break;
 293         }
 294
 295         mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, val << YC_MAP, YC_MAP_MASK);
 296 }
 297
 298 static void mtk_dpi_config_channel_swap(struct mtk_dpi *dpi,
 299                                         enum mtk_dpi_out_channel_swap swap)
 300 {
 301         u32 val;
 302
 303         switch (swap) {
 304         case MTK_DPI_OUT_CHANNEL_SWAP_RGB:
 305                 val = SWAP_RGB;
 306                 break;
 307         case MTK_DPI_OUT_CHANNEL_SWAP_GBR:
 308                 val = SWAP_GBR;
 309                 break;
 310         case MTK_DPI_OUT_CHANNEL_SWAP_BRG:
 311                 val = SWAP_BRG;
 312                 break;
 313         case MTK_DPI_OUT_CHANNEL_SWAP_RBG:
 314                 val = SWAP_RBG;
 315                 break;
 316         case MTK_DPI_OUT_CHANNEL_SWAP_GRB:
 317                 val = SWAP_GRB;
 318                 break;
 319         case MTK_DPI_OUT_CHANNEL_SWAP_BGR:
 320                 val = SWAP_BGR;
 321                 break;
 322         default:
 323                 val = SWAP_RGB;
 324                 break;
 325         }
 326
 327         mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, val << CH_SWAP, CH_SWAP_MASK);
 328 }
 329
 330 static void mtk_dpi_config_yuv422_enable(struct mtk_dpi *dpi, bool enable)
 331 {
 332         mtk_dpi_mask(dpi, DPI_CON, enable ? YUV422_EN : 0, YUV422_EN);
 333 }
 334
 335 static void mtk_dpi_config_csc_enable(struct mtk_dpi *dpi, bool enable)
 336 {
 337         mtk_dpi_mask(dpi, DPI_CON, enable ? CSC_ENABLE : 0, CSC_ENABLE);
 338 }
 339
 340 static void mtk_dpi_config_swap_input(struct mtk_dpi *dpi, bool enable)
 341 {
 342         mtk_dpi_mask(dpi, DPI_CON, enable ? IN_RB_SWAP : 0, IN_RB_SWAP);
 343 }
 344
 345 static void mtk_dpi_config_2n_h_fre(struct mtk_dpi *dpi)
 346 {
 347         mtk_dpi_mask(dpi, dpi->conf->reg_h_fre_con, H_FRE_2N, H_FRE_2N);
 348 }
 349
 350 static void mtk_dpi_config_disable_edge(struct mtk_dpi *dpi)
 351 {
 352         if (dpi->conf->edge_sel_en)
 353                 mtk_dpi_mask(dpi, dpi->conf->reg_h_fre_con, 0, EDGE_SEL_EN);
 354 }
 355
 356 static void mtk_dpi_config_color_format(struct mtk_dpi *dpi,
 357                                         enum mtk_dpi_out_color_format format)
 358 {
 359         if ((format == MTK_DPI_COLOR_FORMAT_YCBCR_444) ||
 360             (format == MTK_DPI_COLOR_FORMAT_YCBCR_444_FULL)) {
 361                 mtk_dpi_config_yuv422_enable(dpi, false);
 362                 mtk_dpi_config_csc_enable(dpi, true);
 363                 mtk_dpi_config_swap_input(dpi, false);
 364                 mtk_dpi_config_channel_swap(dpi, MTK_DPI_OUT_CHANNEL_SWAP_BGR);
 365         } else if ((format == MTK_DPI_COLOR_FORMAT_YCBCR_422) ||
 366                    (format == MTK_DPI_COLOR_FORMAT_YCBCR_422_FULL)) {
 367                 mtk_dpi_config_yuv422_enable(dpi, true);
 368                 mtk_dpi_config_csc_enable(dpi, true);
 369                 mtk_dpi_config_swap_input(dpi, true);
 370                 mtk_dpi_config_channel_swap(dpi, MTK_DPI_OUT_CHANNEL_SWAP_RGB);
 371         } else {
 372                 mtk_dpi_config_yuv422_enable(dpi, false);
 373                 mtk_dpi_config_csc_enable(dpi, false);
 374                 mtk_dpi_config_swap_input(dpi, false);
 375                 mtk_dpi_config_channel_swap(dpi, MTK_DPI_OUT_CHANNEL_SWAP_RGB);
 376         }
 377 }
 378
 379 static void mtk_dpi_power_off(struct mtk_dpi *dpi)
 380 {
 381         if (WARN_ON(dpi->refcount == 0))
 382                 return;
 383
 384         if (--dpi->refcount != 0)
 385                 return;
 386
 387         mtk_dpi_disable(dpi);
 388         clk_disable_unprepare(dpi->pixel_clk);
 389         clk_disable_unprepare(dpi->engine_clk);
 390 }
 391
 392 static int mtk_dpi_power_on(struct mtk_dpi *dpi)
 393 {
 394         int ret;
 395
 396         if (++dpi->refcount != 1)
 397                 return 0;
 398
 399         ret = clk_prepare_enable(dpi->engine_clk);
 400         if (ret) {
 401                 dev_err(dpi->dev, "Failed to enable engine clock: %d\n", ret);
 402                 goto err_refcount;
 403         }
 404
 405         ret = clk_prepare_enable(dpi->pixel_clk);
 406         if (ret) {
 407                 dev_err(dpi->dev, "Failed to enable pixel clock: %d\n", ret);
 408                 goto err_pixel;
 409         }
 410
 411         mtk_dpi_enable(dpi);
 412         return 0;
 413
 414 err_pixel:
 415         clk_disable_unprepare(dpi->engine_clk);
 416 err_refcount:
 417         dpi->refcount--;
 418         return ret;
 419 }
 420
 421 static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi,
 422                                     struct drm_display_mode *mode)
 423 {
 424         struct mtk_dpi_yc_limit limit;
 425         struct mtk_dpi_polarities dpi_pol;
 426         struct mtk_dpi_sync_param hsync;
 427         struct mtk_dpi_sync_param vsync_lodd = { 0 };
 428         struct mtk_dpi_sync_param vsync_leven = { 0 };
 429         struct mtk_dpi_sync_param vsync_rodd = { 0 };
 430         struct mtk_dpi_sync_param vsync_reven = { 0 };
 431         struct videomode vm = { 0 };
 432         unsigned long pll_rate;
 433         unsigned int factor;
 434
 435         /* let pll_rate can fix the valid range of tvdpll (1G~2GHz) */
 436         factor = dpi->conf->cal_factor(mode->clock);
 437         drm_display_mode_to_videomode(mode, &vm);
 438         pll_rate = vm.pixelclock * factor;
 439
 440         dev_dbg(dpi->dev, "Want PLL %lu Hz, pixel clock %lu Hz\n",
 441                 pll_rate, vm.pixelclock);
 442
 443         clk_set_rate(dpi->tvd_clk, pll_rate);
 444         pll_rate = clk_get_rate(dpi->tvd_clk);
 445
 446         vm.pixelclock = pll_rate / factor;
 447         clk_set_rate(dpi->pixel_clk, vm.pixelclock);
 448         vm.pixelclock = clk_get_rate(dpi->pixel_clk);
 449
 450         dev_dbg(dpi->dev, "Got  PLL %lu Hz, pixel clock %lu Hz\n",
 451                 pll_rate, vm.pixelclock);
 452
 453         limit.c_bottom = 0x0010;
 454         limit.c_top = 0x0FE0;
 455         limit.y_bottom = 0x0010;
 456         limit.y_top = 0x0FE0;
 457
 458         dpi_pol.ck_pol = MTK_DPI_POLARITY_FALLING;
 459         dpi_pol.de_pol = MTK_DPI_POLARITY_RISING;
 460         dpi_pol.hsync_pol = vm.flags & DISPLAY_FLAGS_HSYNC_HIGH ?
 461                             MTK_DPI_POLARITY_FALLING : MTK_DPI_POLARITY_RISING;
 462         dpi_pol.vsync_pol = vm.flags & DISPLAY_FLAGS_VSYNC_HIGH ?
 463                             MTK_DPI_POLARITY_FALLING : MTK_DPI_POLARITY_RISING;
 464         hsync.sync_width = vm.hsync_len;
 465         hsync.back_porch = vm.hback_porch;
 466         hsync.front_porch = vm.hfront_porch;
 467         hsync.shift_half_line = false;
 468         vsync_lodd.sync_width = vm.vsync_len;
 469         vsync_lodd.back_porch = vm.vback_porch;
 470         vsync_lodd.front_porch = vm.vfront_porch;
 471         vsync_lodd.shift_half_line = false;
 472
 473         if (vm.flags & DISPLAY_FLAGS_INTERLACED &&
 474             mode->flags & DRM_MODE_FLAG_3D_MASK) {
 475                 vsync_leven = vsync_lodd;
 476                 vsync_rodd = vsync_lodd;
 477                 vsync_reven = vsync_lodd;
 478                 vsync_leven.shift_half_line = true;
 479                 vsync_reven.shift_half_line = true;
 480         } else if (vm.flags & DISPLAY_FLAGS_INTERLACED &&
 481                    !(mode->flags & DRM_MODE_FLAG_3D_MASK)) {
 482                 vsync_leven = vsync_lodd;
 483                 vsync_leven.shift_half_line = true;
 484         } else if (!(vm.flags & DISPLAY_FLAGS_INTERLACED) &&
 485                    mode->flags & DRM_MODE_FLAG_3D_MASK) {
 486                 vsync_rodd = vsync_lodd;
 487         }
 488         mtk_dpi_sw_reset(dpi, true);
 489         mtk_dpi_config_pol(dpi, &dpi_pol);
 490
 491         mtk_dpi_config_hsync(dpi, &hsync);
 492         mtk_dpi_config_vsync_lodd(dpi, &vsync_lodd);
 493         mtk_dpi_config_vsync_rodd(dpi, &vsync_rodd);
 494         mtk_dpi_config_vsync_leven(dpi, &vsync_leven);
 495         mtk_dpi_config_vsync_reven(dpi, &vsync_reven);
 496
 497         mtk_dpi_config_3d(dpi, !!(mode->flags & DRM_MODE_FLAG_3D_MASK));
 498         mtk_dpi_config_interface(dpi, !!(vm.flags &
 499                                          DISPLAY_FLAGS_INTERLACED));
 500         if (vm.flags & DISPLAY_FLAGS_INTERLACED)
 501                 mtk_dpi_config_fb_size(dpi, vm.hactive, vm.vactive >> 1);
 502         else
 503                 mtk_dpi_config_fb_size(dpi, vm.hactive, vm.vactive);
 504
 505         mtk_dpi_config_channel_limit(dpi, &limit);
 506         mtk_dpi_config_bit_num(dpi, dpi->bit_num);
 507         mtk_dpi_config_channel_swap(dpi, dpi->channel_swap);
 508         mtk_dpi_config_yc_map(dpi, dpi->yc_map);
 509         mtk_dpi_config_color_format(dpi, dpi->color_format);
 510         mtk_dpi_config_2n_h_fre(dpi);
 511         mtk_dpi_config_disable_edge(dpi);
 512         mtk_dpi_sw_reset(dpi, false);
 513
 514         return 0;
 515 }
 516
 517 static void mtk_dpi_encoder_destroy(struct drm_encoder *encoder)
 518 {
 519         drm_encoder_cleanup(encoder);
 520 }
 521
 522 static const struct drm_encoder_funcs mtk_dpi_encoder_funcs = {
 523         .destroy = mtk_dpi_encoder_destroy,
 524 };
 525
 526 static bool mtk_dpi_encoder_mode_fixup(struct drm_encoder *encoder,
 527                                        const struct drm_display_mode *mode,
 528                                        struct drm_display_mode *adjusted_mode)
 529 {
 530         return true;
 531 }
 532
 533 static void mtk_dpi_encoder_mode_set(struct drm_encoder *encoder,
 534                                      struct drm_display_mode *mode,
 535                                      struct drm_display_mode *adjusted_mode)
 536 {
 537         struct mtk_dpi *dpi = mtk_dpi_from_encoder(encoder);
 538
 539         drm_mode_copy(&dpi->mode, adjusted_mode);
 540 }
 541
 542 static void mtk_dpi_encoder_disable(struct drm_encoder *encoder)
 543 {
 544         struct mtk_dpi *dpi = mtk_dpi_from_encoder(encoder);
 545
 546         mtk_dpi_power_off(dpi);
 547 }
 548
 549 static void mtk_dpi_encoder_enable(struct drm_encoder *encoder)
 550 {
 551         struct mtk_dpi *dpi = mtk_dpi_from_encoder(encoder);
 552
 553         mtk_dpi_power_on(dpi);
 554         mtk_dpi_set_display_mode(dpi, &dpi->mode);
 555 }
 556
 557 static int mtk_dpi_atomic_check(struct drm_encoder *encoder,
 558                                 struct drm_crtc_state *crtc_state,
 559                                 struct drm_connector_state *conn_state)
 560 {
 561         return 0;
 562 }
 563
 564 static const struct drm_encoder_helper_funcs mtk_dpi_encoder_helper_funcs = {
 565         .mode_fixup = mtk_dpi_encoder_mode_fixup,
 566         .mode_set = mtk_dpi_encoder_mode_set,
 567         .disable = mtk_dpi_encoder_disable,
 568         .enable = mtk_dpi_encoder_enable,
 569         .atomic_check = mtk_dpi_atomic_check,
 570 };
 571
 572 static void mtk_dpi_start(struct mtk_ddp_comp *comp)
 573 {
 574         struct mtk_dpi *dpi = container_of(comp, struct mtk_dpi, ddp_comp);
 575
 576         mtk_dpi_power_on(dpi);
 577 }
 578
 579 static void mtk_dpi_stop(struct mtk_ddp_comp *comp)
 580 {
 581         struct mtk_dpi *dpi = container_of(comp, struct mtk_dpi, ddp_comp);
 582
 583         mtk_dpi_power_off(dpi);
 584 }
 585
 586 static const struct mtk_ddp_comp_funcs mtk_dpi_funcs = {
 587         .start = mtk_dpi_start,
 588         .stop = mtk_dpi_stop,
 589 };
 590
 591 static int mtk_dpi_bind(struct device *dev, struct device *master, void *data)
 592 {
 593         struct mtk_dpi *dpi = dev_get_drvdata(dev);
 594         struct drm_device *drm_dev = data;
 595         int ret;
 596
 597         ret = mtk_ddp_comp_register(drm_dev, &dpi->ddp_comp);
 598         if (ret < 0) {
 599                 dev_err(dev, "Failed to register component %pOF: %d\n",
 600                         dev->of_node, ret);
 601                 return ret;
 602         }
 603
 604         ret = drm_encoder_init(drm_dev, &dpi->encoder, &mtk_dpi_encoder_funcs,
 605                                DRM_MODE_ENCODER_TMDS, NULL);
 606         if (ret) {
 607                 dev_err(dev, "Failed to initialize decoder: %d\n", ret);
 608                 goto err_unregister;
 609         }
 610         drm_encoder_helper_add(&dpi->encoder, &mtk_dpi_encoder_helper_funcs);
 611
 612         /* Currently DPI0 is fixed to be driven by OVL1 */
 613         dpi->encoder.possible_crtcs = BIT(1);
 614
 615         ret = drm_bridge_attach(&dpi->encoder, dpi->bridge, NULL);
 616         if (ret) {
 617                 dev_err(dev, "Failed to attach bridge: %d\n", ret);
 618                 goto err_cleanup;
 619         }
 620
 621         dpi->bit_num = MTK_DPI_OUT_BIT_NUM_8BITS;
 622         dpi->channel_swap = MTK_DPI_OUT_CHANNEL_SWAP_RGB;
 623         dpi->yc_map = MTK_DPI_OUT_YC_MAP_RGB;
 624         dpi->color_format = MTK_DPI_COLOR_FORMAT_RGB;
 625
 626         return 0;
 627
 628 err_cleanup:
 629         drm_encoder_cleanup(&dpi->encoder);
 630 err_unregister:
 631         mtk_ddp_comp_unregister(drm_dev, &dpi->ddp_comp);
 632         return ret;
 633 }
 634
 635 static void mtk_dpi_unbind(struct device *dev, struct device *master,
 636                            void *data)
 637 {
 638         struct mtk_dpi *dpi = dev_get_drvdata(dev);
 639         struct drm_device *drm_dev = data;
 640
 641         drm_encoder_cleanup(&dpi->encoder);
 642         mtk_ddp_comp_unregister(drm_dev, &dpi->ddp_comp);
 643 }
 644
 645 static const struct component_ops mtk_dpi_component_ops = {
 646         .bind = mtk_dpi_bind,
 647         .unbind = mtk_dpi_unbind,
 648 };
 649
 650 static unsigned int mt8173_calculate_factor(int clock)
 651 {
 652         if (clock <= 27000)
 653                 return 3 << 4;
 654         else if (clock <= 84000)
 655                 return 3 << 3;
 656         else if (clock <= 167000)
 657                 return 3 << 2;
 658         else
 659                 return 3 << 1;
 660 }
 661
 662 static unsigned int mt2701_calculate_factor(int clock)
 663 {
 664         if (clock <= 64000)
 665                 return 4;
 666         else if (clock <= 128000)
 667                 return 2;
 668         else
 669                 return 1;
 670 }
 671
 672 static const struct mtk_dpi_conf mt8173_conf = {
 673         .cal_factor = mt8173_calculate_factor,
 674         .reg_h_fre_con = 0xe0,
 675 };
 676
 677 static const struct mtk_dpi_conf mt2701_conf = {
 678         .cal_factor = mt2701_calculate_factor,
 679         .reg_h_fre_con = 0xb0,
 680         .edge_sel_en = true,
 681 };
 682
 683 static int mtk_dpi_probe(struct platform_device *pdev)
 684 {
 685         struct device *dev = &pdev->dev;
 686         struct mtk_dpi *dpi;
 687         struct resource *mem;
 688         int comp_id;
 689         int ret;
 690
 691         dpi = devm_kzalloc(dev, sizeof(*dpi), GFP_KERNEL);
 692         if (!dpi)
 693                 return -ENOMEM;
 694
 695         dpi->dev = dev;
 696         dpi->conf = (struct mtk_dpi_conf *)of_device_get_match_data(dev);
 697
 698         mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 699         dpi->regs = devm_ioremap_resource(dev, mem);
 700         if (IS_ERR(dpi->regs)) {
 701                 ret = PTR_ERR(dpi->regs);
 702                 dev_err(dev, "Failed to ioremap mem resource: %d\n", ret);
 703                 return ret;
 704         }
 705
 706         dpi->engine_clk = devm_clk_get(dev, "engine");
 707         if (IS_ERR(dpi->engine_clk)) {
 708                 ret = PTR_ERR(dpi->engine_clk);
 709                 dev_err(dev, "Failed to get engine clock: %d\n", ret);
 710                 return ret;
 711         }
 712
 713         dpi->pixel_clk = devm_clk_get(dev, "pixel");
 714         if (IS_ERR(dpi->pixel_clk)) {
 715                 ret = PTR_ERR(dpi->pixel_clk);
 716                 dev_err(dev, "Failed to get pixel clock: %d\n", ret);
 717                 return ret;
 718         }
 719
 720         dpi->tvd_clk = devm_clk_get(dev, "pll");
 721         if (IS_ERR(dpi->tvd_clk)) {
 722                 ret = PTR_ERR(dpi->tvd_clk);
 723                 dev_err(dev, "Failed to get tvdpll clock: %d\n", ret);
 724                 return ret;
 725         }
 726
 727         dpi->irq = platform_get_irq(pdev, 0);
 728         if (dpi->irq <= 0) {
 729                 dev_err(dev, "Failed to get irq: %d\n", dpi->irq);
 730                 return -EINVAL;
 731         }
 732
 733         ret = drm_of_find_panel_or_bridge(dev->of_node, 0, 0,
 734                                           NULL, &dpi->bridge);
 735         if (ret)
 736                 return ret;
 737
 738         dev_info(dev, "Found bridge node: %pOF\n", dpi->bridge->of_node);
 739
 740         comp_id = mtk_ddp_comp_get_id(dev->of_node, MTK_DPI);
 741         if (comp_id < 0) {
 742                 dev_err(dev, "Failed to identify by alias: %d\n", comp_id);
 743                 return comp_id;
 744         }
 745
 746         ret = mtk_ddp_comp_init(dev, dev->of_node, &dpi->ddp_comp, comp_id,
 747                                 &mtk_dpi_funcs);
 748         if (ret) {
 749                 dev_err(dev, "Failed to initialize component: %d\n", ret);
 750                 return ret;
 751         }
 752
 753         platform_set_drvdata(pdev, dpi);
 754
 755         ret = component_add(dev, &mtk_dpi_component_ops);
 756         if (ret) {
 757                 dev_err(dev, "Failed to add component: %d\n", ret);
 758                 return ret;
 759         }
 760
 761         return 0;
 762 }
 763
 764 static int mtk_dpi_remove(struct platform_device *pdev)
 765 {
 766         component_del(&pdev->dev, &mtk_dpi_component_ops);
 767
 768         return 0;
 769 }
 770
 771 static const struct of_device_id mtk_dpi_of_ids[] = {
 772         { .compatible = "mediatek,mt2701-dpi",
 773           .data = &mt2701_conf,
 774         },
 775         { .compatible = "mediatek,mt8173-dpi",
 776           .data = &mt8173_conf,
 777         },
 778         { },
 779 };
 780
 781 struct platform_driver mtk_dpi_driver = {
 782         .probe = mtk_dpi_probe,
 783         .remove = mtk_dpi_remove,
 784         .driver = {
 785                 .name = "mediatek-dpi",
 786                 .of_match_table = mtk_dpi_of_ids,
 787         },
 788 };