1 /* 2 * Copyright (c) 2015 MediaTek Inc. 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 * 8 * This program is distributed in the hope that it will be useful, 9 * but WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 11 * GNU General Public License for more details. 12 */ 13 14 #include <drm/drmP.h> 15 #include <drm/drm_atomic_helper.h> 16 #include <drm/drm_crtc_helper.h> 17 #include <drm/drm_mipi_dsi.h> 18 #include <drm/drm_panel.h> 19 #include <linux/clk.h> 20 #include <linux/component.h> 21 #include <linux/of.h> 22 #include <linux/of_platform.h> 23 #include <linux/of_graph.h> 24 #include <linux/phy/phy.h> 25 #include <linux/platform_device.h> 26 #include <video/videomode.h> 27 28 #include "mtk_drm_ddp_comp.h" 29 30 #define DSI_VIDEO_FIFO_DEPTH (1920 / 4) 31 #define DSI_HOST_FIFO_DEPTH 64 32 33 #define DSI_START 0x00 34 35 #define DSI_CON_CTRL 0x10 36 #define DSI_RESET BIT(0) 37 #define DSI_EN BIT(1) 38 39 #define DSI_MODE_CTRL 0x14 40 #define MODE (3) 41 #define CMD_MODE 0 42 #define SYNC_PULSE_MODE 1 43 #define SYNC_EVENT_MODE 2 44 #define BURST_MODE 3 45 #define FRM_MODE BIT(16) 46 #define MIX_MODE BIT(17) 47 48 #define DSI_TXRX_CTRL 0x18 49 #define VC_NUM (2 << 0) 50 #define LANE_NUM (0xf << 2) 51 #define DIS_EOT BIT(6) 52 #define NULL_EN BIT(7) 53 #define TE_FREERUN BIT(8) 54 #define EXT_TE_EN BIT(9) 55 #define EXT_TE_EDGE BIT(10) 56 #define MAX_RTN_SIZE (0xf << 12) 57 #define HSTX_CKLP_EN BIT(16) 58 59 #define DSI_PSCTRL 0x1c 60 #define DSI_PS_WC 0x3fff 61 #define DSI_PS_SEL (3 << 16) 62 #define PACKED_PS_16BIT_RGB565 (0 << 16) 63 #define LOOSELY_PS_18BIT_RGB666 (1 << 16) 64 #define PACKED_PS_18BIT_RGB666 (2 << 16) 65 #define PACKED_PS_24BIT_RGB888 (3 << 16) 66 67 #define DSI_VSA_NL 0x20 68 #define DSI_VBP_NL 0x24 69 #define DSI_VFP_NL 0x28 70 #define DSI_VACT_NL 0x2C 71 #define DSI_HSA_WC 0x50 72 #define DSI_HBP_WC 0x54 73 #define DSI_HFP_WC 0x58 74 75 #define DSI_HSTX_CKL_WC 0x64 76 77 #define DSI_PHY_LCCON 0x104 78 #define LC_HS_TX_EN BIT(0) 79 #define LC_ULPM_EN BIT(1) 80 #define LC_WAKEUP_EN BIT(2) 81 82 #define DSI_PHY_LD0CON 0x108 83 #define LD0_HS_TX_EN BIT(0) 84 #define LD0_ULPM_EN BIT(1) 85 #define LD0_WAKEUP_EN BIT(2) 86 87 #define DSI_PHY_TIMECON0 0x110 88 #define LPX (0xff << 0) 89 #define HS_PRPR (0xff << 8) 90 #define HS_ZERO (0xff << 16) 91 #define HS_TRAIL (0xff << 24) 92 93 #define DSI_PHY_TIMECON1 0x114 94 #define TA_GO (0xff << 0) 95 #define TA_SURE (0xff << 8) 96 #define TA_GET (0xff << 16) 97 #define DA_HS_EXIT (0xff << 24) 98 99 #define DSI_PHY_TIMECON2 0x118 100 #define CONT_DET (0xff << 0) 101 #define CLK_ZERO (0xff << 16) 102 #define CLK_TRAIL (0xff << 24) 103 104 #define DSI_PHY_TIMECON3 0x11c 105 #define CLK_HS_PRPR (0xff << 0) 106 #define CLK_HS_POST (0xff << 8) 107 #define CLK_HS_EXIT (0xff << 16) 108 109 #define NS_TO_CYCLE(n, c) ((n) / (c) + (((n) % (c)) ? 1 : 0)) 110 111 struct phy; 112 113 struct mtk_dsi { 114 struct mtk_ddp_comp ddp_comp; 115 struct device *dev; 116 struct mipi_dsi_host host; 117 struct drm_encoder encoder; 118 struct drm_connector conn; 119 struct drm_panel *panel; 120 struct drm_bridge *bridge; 121 struct phy *phy; 122 123 void __iomem *regs; 124 125 struct clk *engine_clk; 126 struct clk *digital_clk; 127 struct clk *hs_clk; 128 129 u32 data_rate; 130 131 unsigned long mode_flags; 132 enum mipi_dsi_pixel_format format; 133 unsigned int lanes; 134 struct videomode vm; 135 int refcount; 136 bool enabled; 137 }; 138 139 static inline struct mtk_dsi *encoder_to_dsi(struct drm_encoder *e) 140 { 141 return container_of(e, struct mtk_dsi, encoder); 142 } 143 144 static inline struct mtk_dsi *connector_to_dsi(struct drm_connector *c) 145 { 146 return container_of(c, struct mtk_dsi, conn); 147 } 148 149 static inline struct mtk_dsi *host_to_dsi(struct mipi_dsi_host *h) 150 { 151 return container_of(h, struct mtk_dsi, host); 152 } 153 154 static void mtk_dsi_mask(struct mtk_dsi *dsi, u32 offset, u32 mask, u32 data) 155 { 156 u32 temp = readl(dsi->regs + offset); 157 158 writel((temp & ~mask) | (data & mask), dsi->regs + offset); 159 } 160 161 static void dsi_phy_timconfig(struct mtk_dsi *dsi) 162 { 163 u32 timcon0, timcon1, timcon2, timcon3; 164 unsigned int ui, cycle_time; 165 unsigned int lpx; 166 167 ui = 1000 / dsi->data_rate + 0x01; 168 cycle_time = 8000 / dsi->data_rate + 0x01; 169 lpx = 5; 170 171 timcon0 = (8 << 24) | (0xa << 16) | (0x6 << 8) | lpx; 172 timcon1 = (7 << 24) | (5 * lpx << 16) | ((3 * lpx) / 2) << 8 | 173 (4 * lpx); 174 timcon2 = ((NS_TO_CYCLE(0x64, cycle_time) + 0xa) << 24) | 175 (NS_TO_CYCLE(0x150, cycle_time) << 16); 176 timcon3 = (2 * lpx) << 16 | NS_TO_CYCLE(80 + 52 * ui, cycle_time) << 8 | 177 NS_TO_CYCLE(0x40, cycle_time); 178 179 writel(timcon0, dsi->regs + DSI_PHY_TIMECON0); 180 writel(timcon1, dsi->regs + DSI_PHY_TIMECON1); 181 writel(timcon2, dsi->regs + DSI_PHY_TIMECON2); 182 writel(timcon3, dsi->regs + DSI_PHY_TIMECON3); 183 } 184 185 static void mtk_dsi_enable(struct mtk_dsi *dsi) 186 { 187 mtk_dsi_mask(dsi, DSI_CON_CTRL, DSI_EN, DSI_EN); 188 } 189 190 static void mtk_dsi_disable(struct mtk_dsi *dsi) 191 { 192 mtk_dsi_mask(dsi, DSI_CON_CTRL, DSI_EN, 0); 193 } 194 195 static void mtk_dsi_reset(struct mtk_dsi *dsi) 196 { 197 mtk_dsi_mask(dsi, DSI_CON_CTRL, DSI_RESET, DSI_RESET); 198 mtk_dsi_mask(dsi, DSI_CON_CTRL, DSI_RESET, 0); 199 } 200 201 static int mtk_dsi_poweron(struct mtk_dsi *dsi) 202 { 203 struct device *dev = dsi->dev; 204 int ret; 205 206 if (++dsi->refcount != 1) 207 return 0; 208 209 /** 210 * data_rate = (pixel_clock / 1000) * pixel_dipth * mipi_ratio; 211 * pixel_clock unit is Khz, data_rata unit is MHz, so need divide 1000. 212 * mipi_ratio is mipi clk coefficient for balance the pixel clk in mipi. 213 * we set mipi_ratio is 1.05. 214 */ 215 dsi->data_rate = dsi->vm.pixelclock * 3 * 21 / (1 * 1000 * 10); 216 217 ret = clk_set_rate(dsi->hs_clk, dsi->data_rate * 1000000); 218 if (ret < 0) { 219 dev_err(dev, "Failed to set data rate: %d\n", ret); 220 goto err_refcount; 221 } 222 223 phy_power_on(dsi->phy); 224 225 ret = clk_prepare_enable(dsi->engine_clk); 226 if (ret < 0) { 227 dev_err(dev, "Failed to enable engine clock: %d\n", ret); 228 goto err_phy_power_off; 229 } 230 231 ret = clk_prepare_enable(dsi->digital_clk); 232 if (ret < 0) { 233 dev_err(dev, "Failed to enable digital clock: %d\n", ret); 234 goto err_disable_engine_clk; 235 } 236 237 mtk_dsi_enable(dsi); 238 mtk_dsi_reset(dsi); 239 dsi_phy_timconfig(dsi); 240 241 return 0; 242 243 err_disable_engine_clk: 244 clk_disable_unprepare(dsi->engine_clk); 245 err_phy_power_off: 246 phy_power_off(dsi->phy); 247 err_refcount: 248 dsi->refcount--; 249 return ret; 250 } 251 252 static void dsi_clk_ulp_mode_enter(struct mtk_dsi *dsi) 253 { 254 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_HS_TX_EN, 0); 255 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_ULPM_EN, 0); 256 } 257 258 static void dsi_clk_ulp_mode_leave(struct mtk_dsi *dsi) 259 { 260 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_ULPM_EN, 0); 261 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_WAKEUP_EN, LC_WAKEUP_EN); 262 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_WAKEUP_EN, 0); 263 } 264 265 static void dsi_lane0_ulp_mode_enter(struct mtk_dsi *dsi) 266 { 267 mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_HS_TX_EN, 0); 268 mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_ULPM_EN, 0); 269 } 270 271 static void dsi_lane0_ulp_mode_leave(struct mtk_dsi *dsi) 272 { 273 mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_ULPM_EN, 0); 274 mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_WAKEUP_EN, LD0_WAKEUP_EN); 275 mtk_dsi_mask(dsi, DSI_PHY_LD0CON, LD0_WAKEUP_EN, 0); 276 } 277 278 static bool dsi_clk_hs_state(struct mtk_dsi *dsi) 279 { 280 u32 tmp_reg1; 281 282 tmp_reg1 = readl(dsi->regs + DSI_PHY_LCCON); 283 return ((tmp_reg1 & LC_HS_TX_EN) == 1) ? true : false; 284 } 285 286 static void dsi_clk_hs_mode(struct mtk_dsi *dsi, bool enter) 287 { 288 if (enter && !dsi_clk_hs_state(dsi)) 289 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_HS_TX_EN, LC_HS_TX_EN); 290 else if (!enter && dsi_clk_hs_state(dsi)) 291 mtk_dsi_mask(dsi, DSI_PHY_LCCON, LC_HS_TX_EN, 0); 292 } 293 294 static void dsi_set_mode(struct mtk_dsi *dsi) 295 { 296 u32 vid_mode = CMD_MODE; 297 298 if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO) { 299 vid_mode = SYNC_PULSE_MODE; 300 301 if ((dsi->mode_flags & MIPI_DSI_MODE_VIDEO_BURST) && 302 !(dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE)) 303 vid_mode = BURST_MODE; 304 } 305 306 writel(vid_mode, dsi->regs + DSI_MODE_CTRL); 307 } 308 309 static void dsi_ps_control_vact(struct mtk_dsi *dsi) 310 { 311 struct videomode *vm = &dsi->vm; 312 u32 dsi_buf_bpp, ps_wc; 313 u32 ps_bpp_mode; 314 315 if (dsi->format == MIPI_DSI_FMT_RGB565) 316 dsi_buf_bpp = 2; 317 else 318 dsi_buf_bpp = 3; 319 320 ps_wc = vm->hactive * dsi_buf_bpp; 321 ps_bpp_mode = ps_wc; 322 323 switch (dsi->format) { 324 case MIPI_DSI_FMT_RGB888: 325 ps_bpp_mode |= PACKED_PS_24BIT_RGB888; 326 break; 327 case MIPI_DSI_FMT_RGB666: 328 ps_bpp_mode |= PACKED_PS_18BIT_RGB666; 329 break; 330 case MIPI_DSI_FMT_RGB666_PACKED: 331 ps_bpp_mode |= LOOSELY_PS_18BIT_RGB666; 332 break; 333 case MIPI_DSI_FMT_RGB565: 334 ps_bpp_mode |= PACKED_PS_16BIT_RGB565; 335 break; 336 } 337 338 writel(vm->vactive, dsi->regs + DSI_VACT_NL); 339 writel(ps_bpp_mode, dsi->regs + DSI_PSCTRL); 340 writel(ps_wc, dsi->regs + DSI_HSTX_CKL_WC); 341 } 342 343 static void dsi_rxtx_control(struct mtk_dsi *dsi) 344 { 345 u32 tmp_reg; 346 347 switch (dsi->lanes) { 348 case 1: 349 tmp_reg = 1 << 2; 350 break; 351 case 2: 352 tmp_reg = 3 << 2; 353 break; 354 case 3: 355 tmp_reg = 7 << 2; 356 break; 357 case 4: 358 tmp_reg = 0xf << 2; 359 break; 360 default: 361 tmp_reg = 0xf << 2; 362 break; 363 } 364 365 writel(tmp_reg, dsi->regs + DSI_TXRX_CTRL); 366 } 367 368 static void dsi_ps_control(struct mtk_dsi *dsi) 369 { 370 unsigned int dsi_tmp_buf_bpp; 371 u32 tmp_reg; 372 373 switch (dsi->format) { 374 case MIPI_DSI_FMT_RGB888: 375 tmp_reg = PACKED_PS_24BIT_RGB888; 376 dsi_tmp_buf_bpp = 3; 377 break; 378 case MIPI_DSI_FMT_RGB666: 379 tmp_reg = LOOSELY_PS_18BIT_RGB666; 380 dsi_tmp_buf_bpp = 3; 381 break; 382 case MIPI_DSI_FMT_RGB666_PACKED: 383 tmp_reg = PACKED_PS_18BIT_RGB666; 384 dsi_tmp_buf_bpp = 3; 385 break; 386 case MIPI_DSI_FMT_RGB565: 387 tmp_reg = PACKED_PS_16BIT_RGB565; 388 dsi_tmp_buf_bpp = 2; 389 break; 390 default: 391 tmp_reg = PACKED_PS_24BIT_RGB888; 392 dsi_tmp_buf_bpp = 3; 393 break; 394 } 395 396 tmp_reg += dsi->vm.hactive * dsi_tmp_buf_bpp & DSI_PS_WC; 397 writel(tmp_reg, dsi->regs + DSI_PSCTRL); 398 } 399 400 static void dsi_config_vdo_timing(struct mtk_dsi *dsi) 401 { 402 unsigned int horizontal_sync_active_byte; 403 unsigned int horizontal_backporch_byte; 404 unsigned int horizontal_frontporch_byte; 405 unsigned int dsi_tmp_buf_bpp; 406 407 struct videomode *vm = &dsi->vm; 408 409 if (dsi->format == MIPI_DSI_FMT_RGB565) 410 dsi_tmp_buf_bpp = 2; 411 else 412 dsi_tmp_buf_bpp = 3; 413 414 writel(vm->vsync_len, dsi->regs + DSI_VSA_NL); 415 writel(vm->vback_porch, dsi->regs + DSI_VBP_NL); 416 writel(vm->vfront_porch, dsi->regs + DSI_VFP_NL); 417 writel(vm->vactive, dsi->regs + DSI_VACT_NL); 418 419 horizontal_sync_active_byte = (vm->hsync_len * dsi_tmp_buf_bpp - 10); 420 421 if (dsi->mode_flags & MIPI_DSI_MODE_VIDEO_SYNC_PULSE) 422 horizontal_backporch_byte = 423 (vm->hback_porch * dsi_tmp_buf_bpp - 10); 424 else 425 horizontal_backporch_byte = ((vm->hback_porch + vm->hsync_len) * 426 dsi_tmp_buf_bpp - 10); 427 428 horizontal_frontporch_byte = (vm->hfront_porch * dsi_tmp_buf_bpp - 12); 429 430 writel(horizontal_sync_active_byte, dsi->regs + DSI_HSA_WC); 431 writel(horizontal_backporch_byte, dsi->regs + DSI_HBP_WC); 432 writel(horizontal_frontporch_byte, dsi->regs + DSI_HFP_WC); 433 434 dsi_ps_control(dsi); 435 } 436 437 static void mtk_dsi_start(struct mtk_dsi *dsi) 438 { 439 writel(0, dsi->regs + DSI_START); 440 writel(1, dsi->regs + DSI_START); 441 } 442 443 static void mtk_dsi_poweroff(struct mtk_dsi *dsi) 444 { 445 if (WARN_ON(dsi->refcount == 0)) 446 return; 447 448 if (--dsi->refcount != 0) 449 return; 450 451 dsi_lane0_ulp_mode_enter(dsi); 452 dsi_clk_ulp_mode_enter(dsi); 453 454 mtk_dsi_disable(dsi); 455 456 clk_disable_unprepare(dsi->engine_clk); 457 clk_disable_unprepare(dsi->digital_clk); 458 459 phy_power_off(dsi->phy); 460 } 461 462 static void mtk_output_dsi_enable(struct mtk_dsi *dsi) 463 { 464 int ret; 465 466 if (dsi->enabled) 467 return; 468 469 if (dsi->panel) { 470 if (drm_panel_prepare(dsi->panel)) { 471 DRM_ERROR("failed to setup the panel\n"); 472 return; 473 } 474 } 475 476 ret = mtk_dsi_poweron(dsi); 477 if (ret < 0) { 478 DRM_ERROR("failed to power on dsi\n"); 479 return; 480 } 481 482 dsi_rxtx_control(dsi); 483 484 dsi_clk_ulp_mode_leave(dsi); 485 dsi_lane0_ulp_mode_leave(dsi); 486 dsi_clk_hs_mode(dsi, 0); 487 dsi_set_mode(dsi); 488 489 dsi_ps_control_vact(dsi); 490 dsi_config_vdo_timing(dsi); 491 492 dsi_set_mode(dsi); 493 dsi_clk_hs_mode(dsi, 1); 494 495 mtk_dsi_start(dsi); 496 497 dsi->enabled = true; 498 } 499 500 static void mtk_output_dsi_disable(struct mtk_dsi *dsi) 501 { 502 if (!dsi->enabled) 503 return; 504 505 if (dsi->panel) { 506 if (drm_panel_disable(dsi->panel)) { 507 DRM_ERROR("failed to disable the panel\n"); 508 return; 509 } 510 } 511 512 mtk_dsi_poweroff(dsi); 513 514 dsi->enabled = false; 515 } 516 517 static void mtk_dsi_encoder_destroy(struct drm_encoder *encoder) 518 { 519 drm_encoder_cleanup(encoder); 520 } 521 522 static const struct drm_encoder_funcs mtk_dsi_encoder_funcs = { 523 .destroy = mtk_dsi_encoder_destroy, 524 }; 525 526 static bool mtk_dsi_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_dsi_encoder_mode_set(struct drm_encoder *encoder, 534 struct drm_display_mode *mode, 535 struct drm_display_mode *adjusted) 536 { 537 struct mtk_dsi *dsi = encoder_to_dsi(encoder); 538 539 dsi->vm.pixelclock = adjusted->clock; 540 dsi->vm.hactive = adjusted->hdisplay; 541 dsi->vm.hback_porch = adjusted->htotal - adjusted->hsync_end; 542 dsi->vm.hfront_porch = adjusted->hsync_start - adjusted->hdisplay; 543 dsi->vm.hsync_len = adjusted->hsync_end - adjusted->hsync_start; 544 545 dsi->vm.vactive = adjusted->vdisplay; 546 dsi->vm.vback_porch = adjusted->vtotal - adjusted->vsync_end; 547 dsi->vm.vfront_porch = adjusted->vsync_start - adjusted->vdisplay; 548 dsi->vm.vsync_len = adjusted->vsync_end - adjusted->vsync_start; 549 } 550 551 static void mtk_dsi_encoder_disable(struct drm_encoder *encoder) 552 { 553 struct mtk_dsi *dsi = encoder_to_dsi(encoder); 554 555 mtk_output_dsi_disable(dsi); 556 } 557 558 static void mtk_dsi_encoder_enable(struct drm_encoder *encoder) 559 { 560 struct mtk_dsi *dsi = encoder_to_dsi(encoder); 561 562 mtk_output_dsi_enable(dsi); 563 } 564 565 static enum drm_connector_status mtk_dsi_connector_detect( 566 struct drm_connector *connector, bool force) 567 { 568 return connector_status_connected; 569 } 570 571 static int mtk_dsi_connector_get_modes(struct drm_connector *connector) 572 { 573 struct mtk_dsi *dsi = connector_to_dsi(connector); 574 575 return drm_panel_get_modes(dsi->panel); 576 } 577 578 static struct drm_encoder *mtk_dsi_connector_best_encoder( 579 struct drm_connector *connector) 580 { 581 struct mtk_dsi *dsi = connector_to_dsi(connector); 582 583 return &dsi->encoder; 584 } 585 586 static const struct drm_encoder_helper_funcs mtk_dsi_encoder_helper_funcs = { 587 .mode_fixup = mtk_dsi_encoder_mode_fixup, 588 .mode_set = mtk_dsi_encoder_mode_set, 589 .disable = mtk_dsi_encoder_disable, 590 .enable = mtk_dsi_encoder_enable, 591 }; 592 593 static const struct drm_connector_funcs mtk_dsi_connector_funcs = { 594 .dpms = drm_atomic_helper_connector_dpms, 595 .detect = mtk_dsi_connector_detect, 596 .fill_modes = drm_helper_probe_single_connector_modes, 597 .destroy = drm_connector_cleanup, 598 .reset = drm_atomic_helper_connector_reset, 599 .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, 600 .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, 601 }; 602 603 static const struct drm_connector_helper_funcs 604 mtk_dsi_connector_helper_funcs = { 605 .get_modes = mtk_dsi_connector_get_modes, 606 .best_encoder = mtk_dsi_connector_best_encoder, 607 }; 608 609 static int mtk_drm_attach_bridge(struct drm_bridge *bridge, 610 struct drm_encoder *encoder) 611 { 612 int ret; 613 614 if (!bridge) 615 return -ENOENT; 616 617 encoder->bridge = bridge; 618 bridge->encoder = encoder; 619 ret = drm_bridge_attach(encoder->dev, bridge); 620 if (ret) { 621 DRM_ERROR("Failed to attach bridge to drm\n"); 622 encoder->bridge = NULL; 623 bridge->encoder = NULL; 624 } 625 626 return ret; 627 } 628 629 static int mtk_dsi_create_connector(struct drm_device *drm, struct mtk_dsi *dsi) 630 { 631 int ret; 632 633 ret = drm_connector_init(drm, &dsi->conn, &mtk_dsi_connector_funcs, 634 DRM_MODE_CONNECTOR_DSI); 635 if (ret) { 636 DRM_ERROR("Failed to connector init to drm\n"); 637 return ret; 638 } 639 640 drm_connector_helper_add(&dsi->conn, &mtk_dsi_connector_helper_funcs); 641 642 dsi->conn.dpms = DRM_MODE_DPMS_OFF; 643 drm_mode_connector_attach_encoder(&dsi->conn, &dsi->encoder); 644 645 if (dsi->panel) { 646 ret = drm_panel_attach(dsi->panel, &dsi->conn); 647 if (ret) { 648 DRM_ERROR("Failed to attach panel to drm\n"); 649 goto err_connector_cleanup; 650 } 651 } 652 653 return 0; 654 655 err_connector_cleanup: 656 drm_connector_cleanup(&dsi->conn); 657 return ret; 658 } 659 660 static int mtk_dsi_create_conn_enc(struct drm_device *drm, struct mtk_dsi *dsi) 661 { 662 int ret; 663 664 ret = drm_encoder_init(drm, &dsi->encoder, &mtk_dsi_encoder_funcs, 665 DRM_MODE_ENCODER_DSI, NULL); 666 if (ret) { 667 DRM_ERROR("Failed to encoder init to drm\n"); 668 return ret; 669 } 670 drm_encoder_helper_add(&dsi->encoder, &mtk_dsi_encoder_helper_funcs); 671 672 /* 673 * Currently display data paths are statically assigned to a crtc each. 674 * crtc 0 is OVL0 -> COLOR0 -> AAL -> OD -> RDMA0 -> UFOE -> DSI0 675 */ 676 dsi->encoder.possible_crtcs = 1; 677 678 /* If there's a bridge, attach to it and let it create the connector */ 679 ret = mtk_drm_attach_bridge(dsi->bridge, &dsi->encoder); 680 if (ret) { 681 /* Otherwise create our own connector and attach to a panel */ 682 ret = mtk_dsi_create_connector(drm, dsi); 683 if (ret) 684 goto err_encoder_cleanup; 685 } 686 687 return 0; 688 689 err_encoder_cleanup: 690 drm_encoder_cleanup(&dsi->encoder); 691 return ret; 692 } 693 694 static void mtk_dsi_destroy_conn_enc(struct mtk_dsi *dsi) 695 { 696 drm_encoder_cleanup(&dsi->encoder); 697 /* Skip connector cleanup if creation was delegated to the bridge */ 698 if (dsi->conn.dev) { 699 drm_connector_unregister(&dsi->conn); 700 drm_connector_cleanup(&dsi->conn); 701 } 702 } 703 704 static void mtk_dsi_ddp_start(struct mtk_ddp_comp *comp) 705 { 706 struct mtk_dsi *dsi = container_of(comp, struct mtk_dsi, ddp_comp); 707 708 mtk_dsi_poweron(dsi); 709 } 710 711 static void mtk_dsi_ddp_stop(struct mtk_ddp_comp *comp) 712 { 713 struct mtk_dsi *dsi = container_of(comp, struct mtk_dsi, ddp_comp); 714 715 mtk_dsi_poweroff(dsi); 716 } 717 718 static const struct mtk_ddp_comp_funcs mtk_dsi_funcs = { 719 .start = mtk_dsi_ddp_start, 720 .stop = mtk_dsi_ddp_stop, 721 }; 722 723 static int mtk_dsi_host_attach(struct mipi_dsi_host *host, 724 struct mipi_dsi_device *device) 725 { 726 struct mtk_dsi *dsi = host_to_dsi(host); 727 728 dsi->lanes = device->lanes; 729 dsi->format = device->format; 730 dsi->mode_flags = device->mode_flags; 731 732 if (dsi->conn.dev) 733 drm_helper_hpd_irq_event(dsi->conn.dev); 734 735 return 0; 736 } 737 738 static int mtk_dsi_host_detach(struct mipi_dsi_host *host, 739 struct mipi_dsi_device *device) 740 { 741 struct mtk_dsi *dsi = host_to_dsi(host); 742 743 if (dsi->conn.dev) 744 drm_helper_hpd_irq_event(dsi->conn.dev); 745 746 return 0; 747 } 748 749 static const struct mipi_dsi_host_ops mtk_dsi_ops = { 750 .attach = mtk_dsi_host_attach, 751 .detach = mtk_dsi_host_detach, 752 }; 753 754 static int mtk_dsi_bind(struct device *dev, struct device *master, void *data) 755 { 756 int ret; 757 struct drm_device *drm = data; 758 struct mtk_dsi *dsi = dev_get_drvdata(dev); 759 760 ret = mtk_ddp_comp_register(drm, &dsi->ddp_comp); 761 if (ret < 0) { 762 dev_err(dev, "Failed to register component %s: %d\n", 763 dev->of_node->full_name, ret); 764 return ret; 765 } 766 767 ret = mipi_dsi_host_register(&dsi->host); 768 if (ret < 0) { 769 dev_err(dev, "failed to register DSI host: %d\n", ret); 770 goto err_ddp_comp_unregister; 771 } 772 773 ret = mtk_dsi_create_conn_enc(drm, dsi); 774 if (ret) { 775 DRM_ERROR("Encoder create failed with %d\n", ret); 776 goto err_unregister; 777 } 778 779 return 0; 780 781 err_unregister: 782 mipi_dsi_host_unregister(&dsi->host); 783 err_ddp_comp_unregister: 784 mtk_ddp_comp_unregister(drm, &dsi->ddp_comp); 785 return ret; 786 } 787 788 static void mtk_dsi_unbind(struct device *dev, struct device *master, 789 void *data) 790 { 791 struct drm_device *drm = data; 792 struct mtk_dsi *dsi = dev_get_drvdata(dev); 793 794 mtk_dsi_destroy_conn_enc(dsi); 795 mipi_dsi_host_unregister(&dsi->host); 796 mtk_ddp_comp_unregister(drm, &dsi->ddp_comp); 797 } 798 799 static const struct component_ops mtk_dsi_component_ops = { 800 .bind = mtk_dsi_bind, 801 .unbind = mtk_dsi_unbind, 802 }; 803 804 static int mtk_dsi_probe(struct platform_device *pdev) 805 { 806 struct mtk_dsi *dsi; 807 struct device *dev = &pdev->dev; 808 struct device_node *remote_node, *endpoint; 809 struct resource *regs; 810 int comp_id; 811 int ret; 812 813 dsi = devm_kzalloc(dev, sizeof(*dsi), GFP_KERNEL); 814 if (!dsi) 815 return -ENOMEM; 816 817 dsi->host.ops = &mtk_dsi_ops; 818 dsi->host.dev = dev; 819 820 endpoint = of_graph_get_next_endpoint(dev->of_node, NULL); 821 if (endpoint) { 822 remote_node = of_graph_get_remote_port_parent(endpoint); 823 if (!remote_node) { 824 dev_err(dev, "No panel connected\n"); 825 return -ENODEV; 826 } 827 828 dsi->bridge = of_drm_find_bridge(remote_node); 829 dsi->panel = of_drm_find_panel(remote_node); 830 of_node_put(remote_node); 831 if (!dsi->bridge && !dsi->panel) { 832 dev_info(dev, "Waiting for bridge or panel driver\n"); 833 return -EPROBE_DEFER; 834 } 835 } 836 837 dsi->engine_clk = devm_clk_get(dev, "engine"); 838 if (IS_ERR(dsi->engine_clk)) { 839 ret = PTR_ERR(dsi->engine_clk); 840 dev_err(dev, "Failed to get engine clock: %d\n", ret); 841 return ret; 842 } 843 844 dsi->digital_clk = devm_clk_get(dev, "digital"); 845 if (IS_ERR(dsi->digital_clk)) { 846 ret = PTR_ERR(dsi->digital_clk); 847 dev_err(dev, "Failed to get digital clock: %d\n", ret); 848 return ret; 849 } 850 851 dsi->hs_clk = devm_clk_get(dev, "hs"); 852 if (IS_ERR(dsi->hs_clk)) { 853 ret = PTR_ERR(dsi->hs_clk); 854 dev_err(dev, "Failed to get hs clock: %d\n", ret); 855 return ret; 856 } 857 858 regs = platform_get_resource(pdev, IORESOURCE_MEM, 0); 859 dsi->regs = devm_ioremap_resource(dev, regs); 860 if (IS_ERR(dsi->regs)) { 861 ret = PTR_ERR(dsi->regs); 862 dev_err(dev, "Failed to ioremap memory: %d\n", ret); 863 return ret; 864 } 865 866 dsi->phy = devm_phy_get(dev, "dphy"); 867 if (IS_ERR(dsi->phy)) { 868 ret = PTR_ERR(dsi->phy); 869 dev_err(dev, "Failed to get MIPI-DPHY: %d\n", ret); 870 return ret; 871 } 872 873 comp_id = mtk_ddp_comp_get_id(dev->of_node, MTK_DSI); 874 if (comp_id < 0) { 875 dev_err(dev, "Failed to identify by alias: %d\n", comp_id); 876 return comp_id; 877 } 878 879 ret = mtk_ddp_comp_init(dev, dev->of_node, &dsi->ddp_comp, comp_id, 880 &mtk_dsi_funcs); 881 if (ret) { 882 dev_err(dev, "Failed to initialize component: %d\n", ret); 883 return ret; 884 } 885 886 platform_set_drvdata(pdev, dsi); 887 888 return component_add(&pdev->dev, &mtk_dsi_component_ops); 889 } 890 891 static int mtk_dsi_remove(struct platform_device *pdev) 892 { 893 struct mtk_dsi *dsi = platform_get_drvdata(pdev); 894 895 mtk_output_dsi_disable(dsi); 896 component_del(&pdev->dev, &mtk_dsi_component_ops); 897 898 return 0; 899 } 900 901 static const struct of_device_id mtk_dsi_of_match[] = { 902 { .compatible = "mediatek,mt8173-dsi" }, 903 { }, 904 }; 905 906 struct platform_driver mtk_dsi_driver = { 907 .probe = mtk_dsi_probe, 908 .remove = mtk_dsi_remove, 909 .driver = { 910 .name = "mtk-dsi", 911 .of_match_table = mtk_dsi_of_match, 912 }, 913 }; 914