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_crtc_helper.h> 17 #include <linux/kernel.h> 18 #include <linux/component.h> 19 #include <linux/platform_device.h> 20 #include <linux/of.h> 21 #include <linux/of_graph.h> 22 #include <linux/interrupt.h> 23 #include <linux/types.h> 24 #include <linux/clk.h> 25 26 #include "mtk_dpi_regs.h" 27 #include "mtk_drm_ddp_comp.h" 28 29 enum mtk_dpi_out_bit_num { 30 MTK_DPI_OUT_BIT_NUM_8BITS, 31 MTK_DPI_OUT_BIT_NUM_10BITS, 32 MTK_DPI_OUT_BIT_NUM_12BITS, 33 MTK_DPI_OUT_BIT_NUM_16BITS 34 }; 35 36 enum mtk_dpi_out_yc_map { 37 MTK_DPI_OUT_YC_MAP_RGB, 38 MTK_DPI_OUT_YC_MAP_CYCY, 39 MTK_DPI_OUT_YC_MAP_YCYC, 40 MTK_DPI_OUT_YC_MAP_CY, 41 MTK_DPI_OUT_YC_MAP_YC 42 }; 43 44 enum mtk_dpi_out_channel_swap { 45 MTK_DPI_OUT_CHANNEL_SWAP_RGB, 46 MTK_DPI_OUT_CHANNEL_SWAP_GBR, 47 MTK_DPI_OUT_CHANNEL_SWAP_BRG, 48 MTK_DPI_OUT_CHANNEL_SWAP_RBG, 49 MTK_DPI_OUT_CHANNEL_SWAP_GRB, 50 MTK_DPI_OUT_CHANNEL_SWAP_BGR 51 }; 52 53 enum mtk_dpi_out_color_format { 54 MTK_DPI_COLOR_FORMAT_RGB, 55 MTK_DPI_COLOR_FORMAT_RGB_FULL, 56 MTK_DPI_COLOR_FORMAT_YCBCR_444, 57 MTK_DPI_COLOR_FORMAT_YCBCR_422, 58 MTK_DPI_COLOR_FORMAT_XV_YCC, 59 MTK_DPI_COLOR_FORMAT_YCBCR_444_FULL, 60 MTK_DPI_COLOR_FORMAT_YCBCR_422_FULL 61 }; 62 63 struct mtk_dpi { 64 struct mtk_ddp_comp ddp_comp; 65 struct drm_encoder encoder; 66 struct drm_bridge *bridge; 67 void __iomem *regs; 68 struct device *dev; 69 struct clk *engine_clk; 70 struct clk *pixel_clk; 71 struct clk *tvd_clk; 72 int irq; 73 struct drm_display_mode mode; 74 enum mtk_dpi_out_color_format color_format; 75 enum mtk_dpi_out_yc_map yc_map; 76 enum mtk_dpi_out_bit_num bit_num; 77 enum mtk_dpi_out_channel_swap channel_swap; 78 bool power_sta; 79 u8 power_ctl; 80 }; 81 82 static inline struct mtk_dpi *mtk_dpi_from_encoder(struct drm_encoder *e) 83 { 84 return container_of(e, struct mtk_dpi, encoder); 85 } 86 87 enum mtk_dpi_polarity { 88 MTK_DPI_POLARITY_RISING, 89 MTK_DPI_POLARITY_FALLING, 90 }; 91 92 enum mtk_dpi_power_ctl { 93 DPI_POWER_START = BIT(0), 94 DPI_POWER_ENABLE = BIT(1), 95 }; 96 97 struct mtk_dpi_polarities { 98 enum mtk_dpi_polarity de_pol; 99 enum mtk_dpi_polarity ck_pol; 100 enum mtk_dpi_polarity hsync_pol; 101 enum mtk_dpi_polarity vsync_pol; 102 }; 103 104 struct mtk_dpi_sync_param { 105 u32 sync_width; 106 u32 front_porch; 107 u32 back_porch; 108 bool shift_half_line; 109 }; 110 111 struct mtk_dpi_yc_limit { 112 u16 y_top; 113 u16 y_bottom; 114 u16 c_top; 115 u16 c_bottom; 116 }; 117 118 static void mtk_dpi_mask(struct mtk_dpi *dpi, u32 offset, u32 val, u32 mask) 119 { 120 u32 tmp = readl(dpi->regs + offset) & ~mask; 121 122 tmp |= (val & mask); 123 writel(tmp, dpi->regs + offset); 124 } 125 126 static void mtk_dpi_sw_reset(struct mtk_dpi *dpi, bool reset) 127 { 128 mtk_dpi_mask(dpi, DPI_RET, reset ? RST : 0, RST); 129 } 130 131 static void mtk_dpi_enable(struct mtk_dpi *dpi) 132 { 133 mtk_dpi_mask(dpi, DPI_EN, EN, EN); 134 } 135 136 static void mtk_dpi_disable(struct mtk_dpi *dpi) 137 { 138 mtk_dpi_mask(dpi, DPI_EN, 0, EN); 139 } 140 141 static void mtk_dpi_config_hsync(struct mtk_dpi *dpi, 142 struct mtk_dpi_sync_param *sync) 143 { 144 mtk_dpi_mask(dpi, DPI_TGEN_HWIDTH, 145 sync->sync_width << HPW, HPW_MASK); 146 mtk_dpi_mask(dpi, DPI_TGEN_HPORCH, 147 sync->back_porch << HBP, HBP_MASK); 148 mtk_dpi_mask(dpi, DPI_TGEN_HPORCH, sync->front_porch << HFP, 149 HFP_MASK); 150 } 151 152 static void mtk_dpi_config_vsync(struct mtk_dpi *dpi, 153 struct mtk_dpi_sync_param *sync, 154 u32 width_addr, u32 porch_addr) 155 { 156 mtk_dpi_mask(dpi, width_addr, 157 sync->sync_width << VSYNC_WIDTH_SHIFT, 158 VSYNC_WIDTH_MASK); 159 mtk_dpi_mask(dpi, width_addr, 160 sync->shift_half_line << VSYNC_HALF_LINE_SHIFT, 161 VSYNC_HALF_LINE_MASK); 162 mtk_dpi_mask(dpi, porch_addr, 163 sync->back_porch << VSYNC_BACK_PORCH_SHIFT, 164 VSYNC_BACK_PORCH_MASK); 165 mtk_dpi_mask(dpi, porch_addr, 166 sync->front_porch << VSYNC_FRONT_PORCH_SHIFT, 167 VSYNC_FRONT_PORCH_MASK); 168 } 169 170 static void mtk_dpi_config_vsync_lodd(struct mtk_dpi *dpi, 171 struct mtk_dpi_sync_param *sync) 172 { 173 mtk_dpi_config_vsync(dpi, sync, DPI_TGEN_VWIDTH, DPI_TGEN_VPORCH); 174 } 175 176 static void mtk_dpi_config_vsync_leven(struct mtk_dpi *dpi, 177 struct mtk_dpi_sync_param *sync) 178 { 179 mtk_dpi_config_vsync(dpi, sync, DPI_TGEN_VWIDTH_LEVEN, 180 DPI_TGEN_VPORCH_LEVEN); 181 } 182 183 static void mtk_dpi_config_vsync_rodd(struct mtk_dpi *dpi, 184 struct mtk_dpi_sync_param *sync) 185 { 186 mtk_dpi_config_vsync(dpi, sync, DPI_TGEN_VWIDTH_RODD, 187 DPI_TGEN_VPORCH_RODD); 188 } 189 190 static void mtk_dpi_config_vsync_reven(struct mtk_dpi *dpi, 191 struct mtk_dpi_sync_param *sync) 192 { 193 mtk_dpi_config_vsync(dpi, sync, DPI_TGEN_VWIDTH_REVEN, 194 DPI_TGEN_VPORCH_REVEN); 195 } 196 197 static void mtk_dpi_config_pol(struct mtk_dpi *dpi, 198 struct mtk_dpi_polarities *dpi_pol) 199 { 200 unsigned int pol; 201 202 pol = (dpi_pol->ck_pol == MTK_DPI_POLARITY_RISING ? 0 : CK_POL) | 203 (dpi_pol->de_pol == MTK_DPI_POLARITY_RISING ? 0 : DE_POL) | 204 (dpi_pol->hsync_pol == MTK_DPI_POLARITY_RISING ? 0 : HSYNC_POL) | 205 (dpi_pol->vsync_pol == MTK_DPI_POLARITY_RISING ? 0 : VSYNC_POL); 206 mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, pol, 207 CK_POL | DE_POL | HSYNC_POL | VSYNC_POL); 208 } 209 210 static void mtk_dpi_config_3d(struct mtk_dpi *dpi, bool en_3d) 211 { 212 mtk_dpi_mask(dpi, DPI_CON, en_3d ? TDFP_EN : 0, TDFP_EN); 213 } 214 215 static void mtk_dpi_config_interface(struct mtk_dpi *dpi, bool inter) 216 { 217 mtk_dpi_mask(dpi, DPI_CON, inter ? INTL_EN : 0, INTL_EN); 218 } 219 220 static void mtk_dpi_config_fb_size(struct mtk_dpi *dpi, u32 width, u32 height) 221 { 222 mtk_dpi_mask(dpi, DPI_SIZE, width << HSIZE, HSIZE_MASK); 223 mtk_dpi_mask(dpi, DPI_SIZE, height << VSIZE, VSIZE_MASK); 224 } 225 226 static void mtk_dpi_config_channel_limit(struct mtk_dpi *dpi, 227 struct mtk_dpi_yc_limit *limit) 228 { 229 mtk_dpi_mask(dpi, DPI_Y_LIMIT, limit->y_bottom << Y_LIMINT_BOT, 230 Y_LIMINT_BOT_MASK); 231 mtk_dpi_mask(dpi, DPI_Y_LIMIT, limit->y_top << Y_LIMINT_TOP, 232 Y_LIMINT_TOP_MASK); 233 mtk_dpi_mask(dpi, DPI_C_LIMIT, limit->c_bottom << C_LIMIT_BOT, 234 C_LIMIT_BOT_MASK); 235 mtk_dpi_mask(dpi, DPI_C_LIMIT, limit->c_top << C_LIMIT_TOP, 236 C_LIMIT_TOP_MASK); 237 } 238 239 static void mtk_dpi_config_bit_num(struct mtk_dpi *dpi, 240 enum mtk_dpi_out_bit_num num) 241 { 242 u32 val; 243 244 switch (num) { 245 case MTK_DPI_OUT_BIT_NUM_8BITS: 246 val = OUT_BIT_8; 247 break; 248 case MTK_DPI_OUT_BIT_NUM_10BITS: 249 val = OUT_BIT_10; 250 break; 251 case MTK_DPI_OUT_BIT_NUM_12BITS: 252 val = OUT_BIT_12; 253 break; 254 case MTK_DPI_OUT_BIT_NUM_16BITS: 255 val = OUT_BIT_16; 256 break; 257 default: 258 val = OUT_BIT_8; 259 break; 260 } 261 mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, val << OUT_BIT, 262 OUT_BIT_MASK); 263 } 264 265 static void mtk_dpi_config_yc_map(struct mtk_dpi *dpi, 266 enum mtk_dpi_out_yc_map map) 267 { 268 u32 val; 269 270 switch (map) { 271 case MTK_DPI_OUT_YC_MAP_RGB: 272 val = YC_MAP_RGB; 273 break; 274 case MTK_DPI_OUT_YC_MAP_CYCY: 275 val = YC_MAP_CYCY; 276 break; 277 case MTK_DPI_OUT_YC_MAP_YCYC: 278 val = YC_MAP_YCYC; 279 break; 280 case MTK_DPI_OUT_YC_MAP_CY: 281 val = YC_MAP_CY; 282 break; 283 case MTK_DPI_OUT_YC_MAP_YC: 284 val = YC_MAP_YC; 285 break; 286 default: 287 val = YC_MAP_RGB; 288 break; 289 } 290 291 mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, val << YC_MAP, YC_MAP_MASK); 292 } 293 294 static void mtk_dpi_config_channel_swap(struct mtk_dpi *dpi, 295 enum mtk_dpi_out_channel_swap swap) 296 { 297 u32 val; 298 299 switch (swap) { 300 case MTK_DPI_OUT_CHANNEL_SWAP_RGB: 301 val = SWAP_RGB; 302 break; 303 case MTK_DPI_OUT_CHANNEL_SWAP_GBR: 304 val = SWAP_GBR; 305 break; 306 case MTK_DPI_OUT_CHANNEL_SWAP_BRG: 307 val = SWAP_BRG; 308 break; 309 case MTK_DPI_OUT_CHANNEL_SWAP_RBG: 310 val = SWAP_RBG; 311 break; 312 case MTK_DPI_OUT_CHANNEL_SWAP_GRB: 313 val = SWAP_GRB; 314 break; 315 case MTK_DPI_OUT_CHANNEL_SWAP_BGR: 316 val = SWAP_BGR; 317 break; 318 default: 319 val = SWAP_RGB; 320 break; 321 } 322 323 mtk_dpi_mask(dpi, DPI_OUTPUT_SETTING, val << CH_SWAP, CH_SWAP_MASK); 324 } 325 326 static void mtk_dpi_config_yuv422_enable(struct mtk_dpi *dpi, bool enable) 327 { 328 mtk_dpi_mask(dpi, DPI_CON, enable ? YUV422_EN : 0, YUV422_EN); 329 } 330 331 static void mtk_dpi_config_csc_enable(struct mtk_dpi *dpi, bool enable) 332 { 333 mtk_dpi_mask(dpi, DPI_CON, enable ? CSC_ENABLE : 0, CSC_ENABLE); 334 } 335 336 static void mtk_dpi_config_swap_input(struct mtk_dpi *dpi, bool enable) 337 { 338 mtk_dpi_mask(dpi, DPI_CON, enable ? IN_RB_SWAP : 0, IN_RB_SWAP); 339 } 340 341 static void mtk_dpi_config_2n_h_fre(struct mtk_dpi *dpi) 342 { 343 mtk_dpi_mask(dpi, DPI_H_FRE_CON, H_FRE_2N, H_FRE_2N); 344 } 345 346 static void mtk_dpi_config_color_format(struct mtk_dpi *dpi, 347 enum mtk_dpi_out_color_format format) 348 { 349 if ((format == MTK_DPI_COLOR_FORMAT_YCBCR_444) || 350 (format == MTK_DPI_COLOR_FORMAT_YCBCR_444_FULL)) { 351 mtk_dpi_config_yuv422_enable(dpi, false); 352 mtk_dpi_config_csc_enable(dpi, true); 353 mtk_dpi_config_swap_input(dpi, false); 354 mtk_dpi_config_channel_swap(dpi, MTK_DPI_OUT_CHANNEL_SWAP_BGR); 355 } else if ((format == MTK_DPI_COLOR_FORMAT_YCBCR_422) || 356 (format == MTK_DPI_COLOR_FORMAT_YCBCR_422_FULL)) { 357 mtk_dpi_config_yuv422_enable(dpi, true); 358 mtk_dpi_config_csc_enable(dpi, true); 359 mtk_dpi_config_swap_input(dpi, true); 360 mtk_dpi_config_channel_swap(dpi, MTK_DPI_OUT_CHANNEL_SWAP_RGB); 361 } else { 362 mtk_dpi_config_yuv422_enable(dpi, false); 363 mtk_dpi_config_csc_enable(dpi, false); 364 mtk_dpi_config_swap_input(dpi, false); 365 mtk_dpi_config_channel_swap(dpi, MTK_DPI_OUT_CHANNEL_SWAP_RGB); 366 } 367 } 368 369 static void mtk_dpi_power_off(struct mtk_dpi *dpi, enum mtk_dpi_power_ctl pctl) 370 { 371 dpi->power_ctl &= ~pctl; 372 373 if ((dpi->power_ctl & DPI_POWER_START) || 374 (dpi->power_ctl & DPI_POWER_ENABLE)) 375 return; 376 377 if (!dpi->power_sta) 378 return; 379 380 mtk_dpi_disable(dpi); 381 clk_disable_unprepare(dpi->pixel_clk); 382 clk_disable_unprepare(dpi->engine_clk); 383 dpi->power_sta = false; 384 } 385 386 static int mtk_dpi_power_on(struct mtk_dpi *dpi, enum mtk_dpi_power_ctl pctl) 387 { 388 int ret; 389 390 dpi->power_ctl |= pctl; 391 392 if (!(dpi->power_ctl & DPI_POWER_START) && 393 !(dpi->power_ctl & DPI_POWER_ENABLE)) 394 return 0; 395 396 if (dpi->power_sta) 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_eng; 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 dpi->power_sta = true; 413 return 0; 414 415 err_pixel: 416 clk_disable_unprepare(dpi->engine_clk); 417 err_eng: 418 dpi->power_ctl &= ~pctl; 419 return ret; 420 } 421 422 static int mtk_dpi_set_display_mode(struct mtk_dpi *dpi, 423 struct drm_display_mode *mode) 424 { 425 struct mtk_dpi_yc_limit limit; 426 struct mtk_dpi_polarities dpi_pol; 427 struct mtk_dpi_sync_param hsync; 428 struct mtk_dpi_sync_param vsync_lodd = { 0 }; 429 struct mtk_dpi_sync_param vsync_leven = { 0 }; 430 struct mtk_dpi_sync_param vsync_rodd = { 0 }; 431 struct mtk_dpi_sync_param vsync_reven = { 0 }; 432 unsigned long pix_rate; 433 unsigned long pll_rate; 434 unsigned int factor; 435 436 /* let pll_rate can fix the valid range of tvdpll (1G~2GHz) */ 437 pix_rate = 1000UL * mode->clock; 438 if (mode->clock <= 27000) 439 factor = 16 * 3; 440 else if (mode->clock <= 84000) 441 factor = 8 * 3; 442 else if (mode->clock <= 167000) 443 factor = 4 * 3; 444 else 445 factor = 2 * 3; 446 pll_rate = pix_rate * factor; 447 448 dev_dbg(dpi->dev, "Want PLL %lu Hz, pixel clock %lu Hz\n", 449 pll_rate, pix_rate); 450 451 clk_set_rate(dpi->tvd_clk, pll_rate); 452 pll_rate = clk_get_rate(dpi->tvd_clk); 453 454 pix_rate = pll_rate / factor; 455 clk_set_rate(dpi->pixel_clk, pix_rate); 456 pix_rate = clk_get_rate(dpi->pixel_clk); 457 458 dev_dbg(dpi->dev, "Got PLL %lu Hz, pixel clock %lu Hz\n", 459 pll_rate, pix_rate); 460 461 limit.c_bottom = 0x0010; 462 limit.c_top = 0x0FE0; 463 limit.y_bottom = 0x0010; 464 limit.y_top = 0x0FE0; 465 466 dpi_pol.ck_pol = MTK_DPI_POLARITY_FALLING; 467 dpi_pol.de_pol = MTK_DPI_POLARITY_RISING; 468 dpi_pol.hsync_pol = mode->flags & DRM_MODE_FLAG_PHSYNC ? 469 MTK_DPI_POLARITY_FALLING : MTK_DPI_POLARITY_RISING; 470 dpi_pol.vsync_pol = mode->flags & DRM_MODE_FLAG_PVSYNC ? 471 MTK_DPI_POLARITY_FALLING : MTK_DPI_POLARITY_RISING; 472 473 hsync.sync_width = mode->hsync_end - mode->hsync_start; 474 hsync.back_porch = mode->htotal - mode->hsync_end; 475 hsync.front_porch = mode->hsync_start - mode->hdisplay; 476 hsync.shift_half_line = false; 477 478 vsync_lodd.sync_width = mode->vsync_end - mode->vsync_start; 479 vsync_lodd.back_porch = mode->vtotal - mode->vsync_end; 480 vsync_lodd.front_porch = mode->vsync_start - mode->vdisplay; 481 vsync_lodd.shift_half_line = false; 482 483 if (mode->flags & DRM_MODE_FLAG_INTERLACE && 484 mode->flags & DRM_MODE_FLAG_3D_MASK) { 485 vsync_leven = vsync_lodd; 486 vsync_rodd = vsync_lodd; 487 vsync_reven = vsync_lodd; 488 vsync_leven.shift_half_line = true; 489 vsync_reven.shift_half_line = true; 490 } else if (mode->flags & DRM_MODE_FLAG_INTERLACE && 491 !(mode->flags & DRM_MODE_FLAG_3D_MASK)) { 492 vsync_leven = vsync_lodd; 493 vsync_leven.shift_half_line = true; 494 } else if (!(mode->flags & DRM_MODE_FLAG_INTERLACE) && 495 mode->flags & DRM_MODE_FLAG_3D_MASK) { 496 vsync_rodd = vsync_lodd; 497 } 498 mtk_dpi_sw_reset(dpi, true); 499 mtk_dpi_config_pol(dpi, &dpi_pol); 500 501 mtk_dpi_config_hsync(dpi, &hsync); 502 mtk_dpi_config_vsync_lodd(dpi, &vsync_lodd); 503 mtk_dpi_config_vsync_rodd(dpi, &vsync_rodd); 504 mtk_dpi_config_vsync_leven(dpi, &vsync_leven); 505 mtk_dpi_config_vsync_reven(dpi, &vsync_reven); 506 507 mtk_dpi_config_3d(dpi, !!(mode->flags & DRM_MODE_FLAG_3D_MASK)); 508 mtk_dpi_config_interface(dpi, !!(mode->flags & 509 DRM_MODE_FLAG_INTERLACE)); 510 if (mode->flags & DRM_MODE_FLAG_INTERLACE) 511 mtk_dpi_config_fb_size(dpi, mode->hdisplay, mode->vdisplay / 2); 512 else 513 mtk_dpi_config_fb_size(dpi, mode->hdisplay, mode->vdisplay); 514 515 mtk_dpi_config_channel_limit(dpi, &limit); 516 mtk_dpi_config_bit_num(dpi, dpi->bit_num); 517 mtk_dpi_config_channel_swap(dpi, dpi->channel_swap); 518 mtk_dpi_config_yc_map(dpi, dpi->yc_map); 519 mtk_dpi_config_color_format(dpi, dpi->color_format); 520 mtk_dpi_config_2n_h_fre(dpi); 521 mtk_dpi_sw_reset(dpi, false); 522 523 return 0; 524 } 525 526 static void mtk_dpi_encoder_destroy(struct drm_encoder *encoder) 527 { 528 drm_encoder_cleanup(encoder); 529 } 530 531 static const struct drm_encoder_funcs mtk_dpi_encoder_funcs = { 532 .destroy = mtk_dpi_encoder_destroy, 533 }; 534 535 static bool mtk_dpi_encoder_mode_fixup(struct drm_encoder *encoder, 536 const struct drm_display_mode *mode, 537 struct drm_display_mode *adjusted_mode) 538 { 539 return true; 540 } 541 542 static void mtk_dpi_encoder_mode_set(struct drm_encoder *encoder, 543 struct drm_display_mode *mode, 544 struct drm_display_mode *adjusted_mode) 545 { 546 struct mtk_dpi *dpi = mtk_dpi_from_encoder(encoder); 547 548 drm_mode_copy(&dpi->mode, adjusted_mode); 549 } 550 551 static void mtk_dpi_encoder_disable(struct drm_encoder *encoder) 552 { 553 struct mtk_dpi *dpi = mtk_dpi_from_encoder(encoder); 554 555 mtk_dpi_power_off(dpi, DPI_POWER_ENABLE); 556 } 557 558 static void mtk_dpi_encoder_enable(struct drm_encoder *encoder) 559 { 560 struct mtk_dpi *dpi = mtk_dpi_from_encoder(encoder); 561 562 mtk_dpi_power_on(dpi, DPI_POWER_ENABLE); 563 mtk_dpi_set_display_mode(dpi, &dpi->mode); 564 } 565 566 static int mtk_dpi_atomic_check(struct drm_encoder *encoder, 567 struct drm_crtc_state *crtc_state, 568 struct drm_connector_state *conn_state) 569 { 570 return 0; 571 } 572 573 static const struct drm_encoder_helper_funcs mtk_dpi_encoder_helper_funcs = { 574 .mode_fixup = mtk_dpi_encoder_mode_fixup, 575 .mode_set = mtk_dpi_encoder_mode_set, 576 .disable = mtk_dpi_encoder_disable, 577 .enable = mtk_dpi_encoder_enable, 578 .atomic_check = mtk_dpi_atomic_check, 579 }; 580 581 static void mtk_dpi_start(struct mtk_ddp_comp *comp) 582 { 583 struct mtk_dpi *dpi = container_of(comp, struct mtk_dpi, ddp_comp); 584 585 mtk_dpi_power_on(dpi, DPI_POWER_START); 586 } 587 588 static void mtk_dpi_stop(struct mtk_ddp_comp *comp) 589 { 590 struct mtk_dpi *dpi = container_of(comp, struct mtk_dpi, ddp_comp); 591 592 mtk_dpi_power_off(dpi, DPI_POWER_START); 593 } 594 595 static const struct mtk_ddp_comp_funcs mtk_dpi_funcs = { 596 .start = mtk_dpi_start, 597 .stop = mtk_dpi_stop, 598 }; 599 600 static int mtk_dpi_bind(struct device *dev, struct device *master, void *data) 601 { 602 struct mtk_dpi *dpi = dev_get_drvdata(dev); 603 struct drm_device *drm_dev = data; 604 int ret; 605 606 ret = mtk_ddp_comp_register(drm_dev, &dpi->ddp_comp); 607 if (ret < 0) { 608 dev_err(dev, "Failed to register component %s: %d\n", 609 dev->of_node->full_name, ret); 610 return ret; 611 } 612 613 ret = drm_encoder_init(drm_dev, &dpi->encoder, &mtk_dpi_encoder_funcs, 614 DRM_MODE_ENCODER_TMDS, NULL); 615 if (ret) { 616 dev_err(dev, "Failed to initialize decoder: %d\n", ret); 617 goto err_unregister; 618 } 619 drm_encoder_helper_add(&dpi->encoder, &mtk_dpi_encoder_helper_funcs); 620 621 /* Currently DPI0 is fixed to be driven by OVL1 */ 622 dpi->encoder.possible_crtcs = BIT(1); 623 624 ret = drm_bridge_attach(&dpi->encoder, dpi->bridge, NULL); 625 if (ret) { 626 dev_err(dev, "Failed to attach bridge: %d\n", ret); 627 goto err_cleanup; 628 } 629 630 dpi->bit_num = MTK_DPI_OUT_BIT_NUM_8BITS; 631 dpi->channel_swap = MTK_DPI_OUT_CHANNEL_SWAP_RGB; 632 dpi->yc_map = MTK_DPI_OUT_YC_MAP_RGB; 633 dpi->color_format = MTK_DPI_COLOR_FORMAT_RGB; 634 635 return 0; 636 637 err_cleanup: 638 drm_encoder_cleanup(&dpi->encoder); 639 err_unregister: 640 mtk_ddp_comp_unregister(drm_dev, &dpi->ddp_comp); 641 return ret; 642 } 643 644 static void mtk_dpi_unbind(struct device *dev, struct device *master, 645 void *data) 646 { 647 struct mtk_dpi *dpi = dev_get_drvdata(dev); 648 struct drm_device *drm_dev = data; 649 650 drm_encoder_cleanup(&dpi->encoder); 651 mtk_ddp_comp_unregister(drm_dev, &dpi->ddp_comp); 652 } 653 654 static const struct component_ops mtk_dpi_component_ops = { 655 .bind = mtk_dpi_bind, 656 .unbind = mtk_dpi_unbind, 657 }; 658 659 static int mtk_dpi_probe(struct platform_device *pdev) 660 { 661 struct device *dev = &pdev->dev; 662 struct mtk_dpi *dpi; 663 struct resource *mem; 664 struct device_node *bridge_node; 665 int comp_id; 666 int ret; 667 668 dpi = devm_kzalloc(dev, sizeof(*dpi), GFP_KERNEL); 669 if (!dpi) 670 return -ENOMEM; 671 672 dpi->dev = dev; 673 674 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0); 675 dpi->regs = devm_ioremap_resource(dev, mem); 676 if (IS_ERR(dpi->regs)) { 677 ret = PTR_ERR(dpi->regs); 678 dev_err(dev, "Failed to ioremap mem resource: %d\n", ret); 679 return ret; 680 } 681 682 dpi->engine_clk = devm_clk_get(dev, "engine"); 683 if (IS_ERR(dpi->engine_clk)) { 684 ret = PTR_ERR(dpi->engine_clk); 685 dev_err(dev, "Failed to get engine clock: %d\n", ret); 686 return ret; 687 } 688 689 dpi->pixel_clk = devm_clk_get(dev, "pixel"); 690 if (IS_ERR(dpi->pixel_clk)) { 691 ret = PTR_ERR(dpi->pixel_clk); 692 dev_err(dev, "Failed to get pixel clock: %d\n", ret); 693 return ret; 694 } 695 696 dpi->tvd_clk = devm_clk_get(dev, "pll"); 697 if (IS_ERR(dpi->tvd_clk)) { 698 ret = PTR_ERR(dpi->tvd_clk); 699 dev_err(dev, "Failed to get tvdpll clock: %d\n", ret); 700 return ret; 701 } 702 703 dpi->irq = platform_get_irq(pdev, 0); 704 if (dpi->irq <= 0) { 705 dev_err(dev, "Failed to get irq: %d\n", dpi->irq); 706 return -EINVAL; 707 } 708 709 bridge_node = of_graph_get_remote_node(dev->of_node, 0, 0); 710 if (!bridge_node) 711 return -ENODEV; 712 713 dev_info(dev, "Found bridge node: %s\n", bridge_node->full_name); 714 715 dpi->bridge = of_drm_find_bridge(bridge_node); 716 of_node_put(bridge_node); 717 if (!dpi->bridge) 718 return -EPROBE_DEFER; 719 720 comp_id = mtk_ddp_comp_get_id(dev->of_node, MTK_DPI); 721 if (comp_id < 0) { 722 dev_err(dev, "Failed to identify by alias: %d\n", comp_id); 723 return comp_id; 724 } 725 726 ret = mtk_ddp_comp_init(dev, dev->of_node, &dpi->ddp_comp, comp_id, 727 &mtk_dpi_funcs); 728 if (ret) { 729 dev_err(dev, "Failed to initialize component: %d\n", ret); 730 return ret; 731 } 732 733 platform_set_drvdata(pdev, dpi); 734 735 ret = component_add(dev, &mtk_dpi_component_ops); 736 if (ret) { 737 dev_err(dev, "Failed to add component: %d\n", ret); 738 return ret; 739 } 740 741 return 0; 742 } 743 744 static int mtk_dpi_remove(struct platform_device *pdev) 745 { 746 component_del(&pdev->dev, &mtk_dpi_component_ops); 747 748 return 0; 749 } 750 751 static const struct of_device_id mtk_dpi_of_ids[] = { 752 { .compatible = "mediatek,mt8173-dpi", }, 753 {} 754 }; 755 756 struct platform_driver mtk_dpi_driver = { 757 .probe = mtk_dpi_probe, 758 .remove = mtk_dpi_remove, 759 .driver = { 760 .name = "mediatek-dpi", 761 .of_match_table = mtk_dpi_of_ids, 762 }, 763 }; 764