1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2009 Nokia Corporation 4 * Author: Tomi Valkeinen <tomi.valkeinen@ti.com> 5 * 6 * Some code and ideas taken from drivers/video/omap/ driver 7 * by Imre Deak. 8 */ 9 10 #define DSS_SUBSYS_NAME "DSS" 11 12 #include <linux/debugfs.h> 13 #include <linux/dma-mapping.h> 14 #include <linux/kernel.h> 15 #include <linux/module.h> 16 #include <linux/io.h> 17 #include <linux/export.h> 18 #include <linux/err.h> 19 #include <linux/delay.h> 20 #include <linux/seq_file.h> 21 #include <linux/clk.h> 22 #include <linux/pinctrl/consumer.h> 23 #include <linux/platform_device.h> 24 #include <linux/pm_runtime.h> 25 #include <linux/gfp.h> 26 #include <linux/sizes.h> 27 #include <linux/mfd/syscon.h> 28 #include <linux/regmap.h> 29 #include <linux/of.h> 30 #include <linux/of_device.h> 31 #include <linux/of_graph.h> 32 #include <linux/regulator/consumer.h> 33 #include <linux/suspend.h> 34 #include <linux/component.h> 35 #include <linux/sys_soc.h> 36 37 #include "omapdss.h" 38 #include "dss.h" 39 40 struct dss_reg { 41 u16 idx; 42 }; 43 44 #define DSS_REG(idx) ((const struct dss_reg) { idx }) 45 46 #define DSS_REVISION DSS_REG(0x0000) 47 #define DSS_SYSCONFIG DSS_REG(0x0010) 48 #define DSS_SYSSTATUS DSS_REG(0x0014) 49 #define DSS_CONTROL DSS_REG(0x0040) 50 #define DSS_SDI_CONTROL DSS_REG(0x0044) 51 #define DSS_PLL_CONTROL DSS_REG(0x0048) 52 #define DSS_SDI_STATUS DSS_REG(0x005C) 53 54 #define REG_GET(dss, idx, start, end) \ 55 FLD_GET(dss_read_reg(dss, idx), start, end) 56 57 #define REG_FLD_MOD(dss, idx, val, start, end) \ 58 dss_write_reg(dss, idx, \ 59 FLD_MOD(dss_read_reg(dss, idx), val, start, end)) 60 61 struct dss_ops { 62 int (*dpi_select_source)(struct dss_device *dss, int port, 63 enum omap_channel channel); 64 int (*select_lcd_source)(struct dss_device *dss, 65 enum omap_channel channel, 66 enum dss_clk_source clk_src); 67 }; 68 69 struct dss_features { 70 enum dss_model model; 71 u8 fck_div_max; 72 unsigned int fck_freq_max; 73 u8 dss_fck_multiplier; 74 const char *parent_clk_name; 75 const enum omap_display_type *ports; 76 int num_ports; 77 const enum omap_dss_output_id *outputs; 78 const struct dss_ops *ops; 79 struct dss_reg_field dispc_clk_switch; 80 bool has_lcd_clk_src; 81 }; 82 83 static const char * const dss_generic_clk_source_names[] = { 84 [DSS_CLK_SRC_FCK] = "FCK", 85 [DSS_CLK_SRC_PLL1_1] = "PLL1:1", 86 [DSS_CLK_SRC_PLL1_2] = "PLL1:2", 87 [DSS_CLK_SRC_PLL1_3] = "PLL1:3", 88 [DSS_CLK_SRC_PLL2_1] = "PLL2:1", 89 [DSS_CLK_SRC_PLL2_2] = "PLL2:2", 90 [DSS_CLK_SRC_PLL2_3] = "PLL2:3", 91 [DSS_CLK_SRC_HDMI_PLL] = "HDMI PLL", 92 }; 93 94 static inline void dss_write_reg(struct dss_device *dss, 95 const struct dss_reg idx, u32 val) 96 { 97 __raw_writel(val, dss->base + idx.idx); 98 } 99 100 static inline u32 dss_read_reg(struct dss_device *dss, const struct dss_reg idx) 101 { 102 return __raw_readl(dss->base + idx.idx); 103 } 104 105 #define SR(dss, reg) \ 106 dss->ctx[(DSS_##reg).idx / sizeof(u32)] = dss_read_reg(dss, DSS_##reg) 107 #define RR(dss, reg) \ 108 dss_write_reg(dss, DSS_##reg, dss->ctx[(DSS_##reg).idx / sizeof(u32)]) 109 110 static void dss_save_context(struct dss_device *dss) 111 { 112 DSSDBG("dss_save_context\n"); 113 114 SR(dss, CONTROL); 115 116 if (dss->feat->outputs[OMAP_DSS_CHANNEL_LCD] & OMAP_DSS_OUTPUT_SDI) { 117 SR(dss, SDI_CONTROL); 118 SR(dss, PLL_CONTROL); 119 } 120 121 dss->ctx_valid = true; 122 123 DSSDBG("context saved\n"); 124 } 125 126 static void dss_restore_context(struct dss_device *dss) 127 { 128 DSSDBG("dss_restore_context\n"); 129 130 if (!dss->ctx_valid) 131 return; 132 133 RR(dss, CONTROL); 134 135 if (dss->feat->outputs[OMAP_DSS_CHANNEL_LCD] & OMAP_DSS_OUTPUT_SDI) { 136 RR(dss, SDI_CONTROL); 137 RR(dss, PLL_CONTROL); 138 } 139 140 DSSDBG("context restored\n"); 141 } 142 143 #undef SR 144 #undef RR 145 146 void dss_ctrl_pll_enable(struct dss_pll *pll, bool enable) 147 { 148 unsigned int shift; 149 unsigned int val; 150 151 if (!pll->dss->syscon_pll_ctrl) 152 return; 153 154 val = !enable; 155 156 switch (pll->id) { 157 case DSS_PLL_VIDEO1: 158 shift = 0; 159 break; 160 case DSS_PLL_VIDEO2: 161 shift = 1; 162 break; 163 case DSS_PLL_HDMI: 164 shift = 2; 165 break; 166 default: 167 DSSERR("illegal DSS PLL ID %d\n", pll->id); 168 return; 169 } 170 171 regmap_update_bits(pll->dss->syscon_pll_ctrl, 172 pll->dss->syscon_pll_ctrl_offset, 173 1 << shift, val << shift); 174 } 175 176 static int dss_ctrl_pll_set_control_mux(struct dss_device *dss, 177 enum dss_clk_source clk_src, 178 enum omap_channel channel) 179 { 180 unsigned int shift, val; 181 182 if (!dss->syscon_pll_ctrl) 183 return -EINVAL; 184 185 switch (channel) { 186 case OMAP_DSS_CHANNEL_LCD: 187 shift = 3; 188 189 switch (clk_src) { 190 case DSS_CLK_SRC_PLL1_1: 191 val = 0; break; 192 case DSS_CLK_SRC_HDMI_PLL: 193 val = 1; break; 194 default: 195 DSSERR("error in PLL mux config for LCD\n"); 196 return -EINVAL; 197 } 198 199 break; 200 case OMAP_DSS_CHANNEL_LCD2: 201 shift = 5; 202 203 switch (clk_src) { 204 case DSS_CLK_SRC_PLL1_3: 205 val = 0; break; 206 case DSS_CLK_SRC_PLL2_3: 207 val = 1; break; 208 case DSS_CLK_SRC_HDMI_PLL: 209 val = 2; break; 210 default: 211 DSSERR("error in PLL mux config for LCD2\n"); 212 return -EINVAL; 213 } 214 215 break; 216 case OMAP_DSS_CHANNEL_LCD3: 217 shift = 7; 218 219 switch (clk_src) { 220 case DSS_CLK_SRC_PLL2_1: 221 val = 0; break; 222 case DSS_CLK_SRC_PLL1_3: 223 val = 1; break; 224 case DSS_CLK_SRC_HDMI_PLL: 225 val = 2; break; 226 default: 227 DSSERR("error in PLL mux config for LCD3\n"); 228 return -EINVAL; 229 } 230 231 break; 232 default: 233 DSSERR("error in PLL mux config\n"); 234 return -EINVAL; 235 } 236 237 regmap_update_bits(dss->syscon_pll_ctrl, dss->syscon_pll_ctrl_offset, 238 0x3 << shift, val << shift); 239 240 return 0; 241 } 242 243 void dss_sdi_init(struct dss_device *dss, int datapairs) 244 { 245 u32 l; 246 247 BUG_ON(datapairs > 3 || datapairs < 1); 248 249 l = dss_read_reg(dss, DSS_SDI_CONTROL); 250 l = FLD_MOD(l, 0xf, 19, 15); /* SDI_PDIV */ 251 l = FLD_MOD(l, datapairs-1, 3, 2); /* SDI_PRSEL */ 252 l = FLD_MOD(l, 2, 1, 0); /* SDI_BWSEL */ 253 dss_write_reg(dss, DSS_SDI_CONTROL, l); 254 255 l = dss_read_reg(dss, DSS_PLL_CONTROL); 256 l = FLD_MOD(l, 0x7, 25, 22); /* SDI_PLL_FREQSEL */ 257 l = FLD_MOD(l, 0xb, 16, 11); /* SDI_PLL_REGN */ 258 l = FLD_MOD(l, 0xb4, 10, 1); /* SDI_PLL_REGM */ 259 dss_write_reg(dss, DSS_PLL_CONTROL, l); 260 } 261 262 int dss_sdi_enable(struct dss_device *dss) 263 { 264 unsigned long timeout; 265 266 dispc_pck_free_enable(dss->dispc, 1); 267 268 /* Reset SDI PLL */ 269 REG_FLD_MOD(dss, DSS_PLL_CONTROL, 1, 18, 18); /* SDI_PLL_SYSRESET */ 270 udelay(1); /* wait 2x PCLK */ 271 272 /* Lock SDI PLL */ 273 REG_FLD_MOD(dss, DSS_PLL_CONTROL, 1, 28, 28); /* SDI_PLL_GOBIT */ 274 275 /* Waiting for PLL lock request to complete */ 276 timeout = jiffies + msecs_to_jiffies(500); 277 while (dss_read_reg(dss, DSS_SDI_STATUS) & (1 << 6)) { 278 if (time_after_eq(jiffies, timeout)) { 279 DSSERR("PLL lock request timed out\n"); 280 goto err1; 281 } 282 } 283 284 /* Clearing PLL_GO bit */ 285 REG_FLD_MOD(dss, DSS_PLL_CONTROL, 0, 28, 28); 286 287 /* Waiting for PLL to lock */ 288 timeout = jiffies + msecs_to_jiffies(500); 289 while (!(dss_read_reg(dss, DSS_SDI_STATUS) & (1 << 5))) { 290 if (time_after_eq(jiffies, timeout)) { 291 DSSERR("PLL lock timed out\n"); 292 goto err1; 293 } 294 } 295 296 dispc_lcd_enable_signal(dss->dispc, 1); 297 298 /* Waiting for SDI reset to complete */ 299 timeout = jiffies + msecs_to_jiffies(500); 300 while (!(dss_read_reg(dss, DSS_SDI_STATUS) & (1 << 2))) { 301 if (time_after_eq(jiffies, timeout)) { 302 DSSERR("SDI reset timed out\n"); 303 goto err2; 304 } 305 } 306 307 return 0; 308 309 err2: 310 dispc_lcd_enable_signal(dss->dispc, 0); 311 err1: 312 /* Reset SDI PLL */ 313 REG_FLD_MOD(dss, DSS_PLL_CONTROL, 0, 18, 18); /* SDI_PLL_SYSRESET */ 314 315 dispc_pck_free_enable(dss->dispc, 0); 316 317 return -ETIMEDOUT; 318 } 319 320 void dss_sdi_disable(struct dss_device *dss) 321 { 322 dispc_lcd_enable_signal(dss->dispc, 0); 323 324 dispc_pck_free_enable(dss->dispc, 0); 325 326 /* Reset SDI PLL */ 327 REG_FLD_MOD(dss, DSS_PLL_CONTROL, 0, 18, 18); /* SDI_PLL_SYSRESET */ 328 } 329 330 const char *dss_get_clk_source_name(enum dss_clk_source clk_src) 331 { 332 return dss_generic_clk_source_names[clk_src]; 333 } 334 335 static void dss_dump_clocks(struct dss_device *dss, struct seq_file *s) 336 { 337 const char *fclk_name; 338 unsigned long fclk_rate; 339 340 if (dss_runtime_get(dss)) 341 return; 342 343 seq_printf(s, "- DSS -\n"); 344 345 fclk_name = dss_get_clk_source_name(DSS_CLK_SRC_FCK); 346 fclk_rate = clk_get_rate(dss->dss_clk); 347 348 seq_printf(s, "%s = %lu\n", 349 fclk_name, 350 fclk_rate); 351 352 dss_runtime_put(dss); 353 } 354 355 static int dss_dump_regs(struct seq_file *s, void *p) 356 { 357 struct dss_device *dss = s->private; 358 359 #define DUMPREG(dss, r) seq_printf(s, "%-35s %08x\n", #r, dss_read_reg(dss, r)) 360 361 if (dss_runtime_get(dss)) 362 return 0; 363 364 DUMPREG(dss, DSS_REVISION); 365 DUMPREG(dss, DSS_SYSCONFIG); 366 DUMPREG(dss, DSS_SYSSTATUS); 367 DUMPREG(dss, DSS_CONTROL); 368 369 if (dss->feat->outputs[OMAP_DSS_CHANNEL_LCD] & OMAP_DSS_OUTPUT_SDI) { 370 DUMPREG(dss, DSS_SDI_CONTROL); 371 DUMPREG(dss, DSS_PLL_CONTROL); 372 DUMPREG(dss, DSS_SDI_STATUS); 373 } 374 375 dss_runtime_put(dss); 376 #undef DUMPREG 377 return 0; 378 } 379 380 static int dss_debug_dump_clocks(struct seq_file *s, void *p) 381 { 382 struct dss_device *dss = s->private; 383 384 dss_dump_clocks(dss, s); 385 dispc_dump_clocks(dss->dispc, s); 386 return 0; 387 } 388 389 static int dss_get_channel_index(enum omap_channel channel) 390 { 391 switch (channel) { 392 case OMAP_DSS_CHANNEL_LCD: 393 return 0; 394 case OMAP_DSS_CHANNEL_LCD2: 395 return 1; 396 case OMAP_DSS_CHANNEL_LCD3: 397 return 2; 398 default: 399 WARN_ON(1); 400 return 0; 401 } 402 } 403 404 static void dss_select_dispc_clk_source(struct dss_device *dss, 405 enum dss_clk_source clk_src) 406 { 407 int b; 408 409 /* 410 * We always use PRCM clock as the DISPC func clock, except on DSS3, 411 * where we don't have separate DISPC and LCD clock sources. 412 */ 413 if (WARN_ON(dss->feat->has_lcd_clk_src && clk_src != DSS_CLK_SRC_FCK)) 414 return; 415 416 switch (clk_src) { 417 case DSS_CLK_SRC_FCK: 418 b = 0; 419 break; 420 case DSS_CLK_SRC_PLL1_1: 421 b = 1; 422 break; 423 case DSS_CLK_SRC_PLL2_1: 424 b = 2; 425 break; 426 default: 427 BUG(); 428 return; 429 } 430 431 REG_FLD_MOD(dss, DSS_CONTROL, b, /* DISPC_CLK_SWITCH */ 432 dss->feat->dispc_clk_switch.start, 433 dss->feat->dispc_clk_switch.end); 434 435 dss->dispc_clk_source = clk_src; 436 } 437 438 void dss_select_dsi_clk_source(struct dss_device *dss, int dsi_module, 439 enum dss_clk_source clk_src) 440 { 441 int b, pos; 442 443 switch (clk_src) { 444 case DSS_CLK_SRC_FCK: 445 b = 0; 446 break; 447 case DSS_CLK_SRC_PLL1_2: 448 BUG_ON(dsi_module != 0); 449 b = 1; 450 break; 451 case DSS_CLK_SRC_PLL2_2: 452 BUG_ON(dsi_module != 1); 453 b = 1; 454 break; 455 default: 456 BUG(); 457 return; 458 } 459 460 pos = dsi_module == 0 ? 1 : 10; 461 REG_FLD_MOD(dss, DSS_CONTROL, b, pos, pos); /* DSIx_CLK_SWITCH */ 462 463 dss->dsi_clk_source[dsi_module] = clk_src; 464 } 465 466 static int dss_lcd_clk_mux_dra7(struct dss_device *dss, 467 enum omap_channel channel, 468 enum dss_clk_source clk_src) 469 { 470 const u8 ctrl_bits[] = { 471 [OMAP_DSS_CHANNEL_LCD] = 0, 472 [OMAP_DSS_CHANNEL_LCD2] = 12, 473 [OMAP_DSS_CHANNEL_LCD3] = 19, 474 }; 475 476 u8 ctrl_bit = ctrl_bits[channel]; 477 int r; 478 479 if (clk_src == DSS_CLK_SRC_FCK) { 480 /* LCDx_CLK_SWITCH */ 481 REG_FLD_MOD(dss, DSS_CONTROL, 0, ctrl_bit, ctrl_bit); 482 return -EINVAL; 483 } 484 485 r = dss_ctrl_pll_set_control_mux(dss, clk_src, channel); 486 if (r) 487 return r; 488 489 REG_FLD_MOD(dss, DSS_CONTROL, 1, ctrl_bit, ctrl_bit); 490 491 return 0; 492 } 493 494 static int dss_lcd_clk_mux_omap5(struct dss_device *dss, 495 enum omap_channel channel, 496 enum dss_clk_source clk_src) 497 { 498 const u8 ctrl_bits[] = { 499 [OMAP_DSS_CHANNEL_LCD] = 0, 500 [OMAP_DSS_CHANNEL_LCD2] = 12, 501 [OMAP_DSS_CHANNEL_LCD3] = 19, 502 }; 503 const enum dss_clk_source allowed_plls[] = { 504 [OMAP_DSS_CHANNEL_LCD] = DSS_CLK_SRC_PLL1_1, 505 [OMAP_DSS_CHANNEL_LCD2] = DSS_CLK_SRC_FCK, 506 [OMAP_DSS_CHANNEL_LCD3] = DSS_CLK_SRC_PLL2_1, 507 }; 508 509 u8 ctrl_bit = ctrl_bits[channel]; 510 511 if (clk_src == DSS_CLK_SRC_FCK) { 512 /* LCDx_CLK_SWITCH */ 513 REG_FLD_MOD(dss, DSS_CONTROL, 0, ctrl_bit, ctrl_bit); 514 return -EINVAL; 515 } 516 517 if (WARN_ON(allowed_plls[channel] != clk_src)) 518 return -EINVAL; 519 520 REG_FLD_MOD(dss, DSS_CONTROL, 1, ctrl_bit, ctrl_bit); 521 522 return 0; 523 } 524 525 static int dss_lcd_clk_mux_omap4(struct dss_device *dss, 526 enum omap_channel channel, 527 enum dss_clk_source clk_src) 528 { 529 const u8 ctrl_bits[] = { 530 [OMAP_DSS_CHANNEL_LCD] = 0, 531 [OMAP_DSS_CHANNEL_LCD2] = 12, 532 }; 533 const enum dss_clk_source allowed_plls[] = { 534 [OMAP_DSS_CHANNEL_LCD] = DSS_CLK_SRC_PLL1_1, 535 [OMAP_DSS_CHANNEL_LCD2] = DSS_CLK_SRC_PLL2_1, 536 }; 537 538 u8 ctrl_bit = ctrl_bits[channel]; 539 540 if (clk_src == DSS_CLK_SRC_FCK) { 541 /* LCDx_CLK_SWITCH */ 542 REG_FLD_MOD(dss, DSS_CONTROL, 0, ctrl_bit, ctrl_bit); 543 return 0; 544 } 545 546 if (WARN_ON(allowed_plls[channel] != clk_src)) 547 return -EINVAL; 548 549 REG_FLD_MOD(dss, DSS_CONTROL, 1, ctrl_bit, ctrl_bit); 550 551 return 0; 552 } 553 554 void dss_select_lcd_clk_source(struct dss_device *dss, 555 enum omap_channel channel, 556 enum dss_clk_source clk_src) 557 { 558 int idx = dss_get_channel_index(channel); 559 int r; 560 561 if (!dss->feat->has_lcd_clk_src) { 562 dss_select_dispc_clk_source(dss, clk_src); 563 dss->lcd_clk_source[idx] = clk_src; 564 return; 565 } 566 567 r = dss->feat->ops->select_lcd_source(dss, channel, clk_src); 568 if (r) 569 return; 570 571 dss->lcd_clk_source[idx] = clk_src; 572 } 573 574 enum dss_clk_source dss_get_dispc_clk_source(struct dss_device *dss) 575 { 576 return dss->dispc_clk_source; 577 } 578 579 enum dss_clk_source dss_get_dsi_clk_source(struct dss_device *dss, 580 int dsi_module) 581 { 582 return dss->dsi_clk_source[dsi_module]; 583 } 584 585 enum dss_clk_source dss_get_lcd_clk_source(struct dss_device *dss, 586 enum omap_channel channel) 587 { 588 if (dss->feat->has_lcd_clk_src) { 589 int idx = dss_get_channel_index(channel); 590 return dss->lcd_clk_source[idx]; 591 } else { 592 /* LCD_CLK source is the same as DISPC_FCLK source for 593 * OMAP2 and OMAP3 */ 594 return dss->dispc_clk_source; 595 } 596 } 597 598 bool dss_div_calc(struct dss_device *dss, unsigned long pck, 599 unsigned long fck_min, dss_div_calc_func func, void *data) 600 { 601 int fckd, fckd_start, fckd_stop; 602 unsigned long fck; 603 unsigned long fck_hw_max; 604 unsigned long fckd_hw_max; 605 unsigned long prate; 606 unsigned int m; 607 608 fck_hw_max = dss->feat->fck_freq_max; 609 610 if (dss->parent_clk == NULL) { 611 unsigned int pckd; 612 613 pckd = fck_hw_max / pck; 614 615 fck = pck * pckd; 616 617 fck = clk_round_rate(dss->dss_clk, fck); 618 619 return func(fck, data); 620 } 621 622 fckd_hw_max = dss->feat->fck_div_max; 623 624 m = dss->feat->dss_fck_multiplier; 625 prate = clk_get_rate(dss->parent_clk); 626 627 fck_min = fck_min ? fck_min : 1; 628 629 fckd_start = min(prate * m / fck_min, fckd_hw_max); 630 fckd_stop = max(DIV_ROUND_UP(prate * m, fck_hw_max), 1ul); 631 632 for (fckd = fckd_start; fckd >= fckd_stop; --fckd) { 633 fck = DIV_ROUND_UP(prate, fckd) * m; 634 635 if (func(fck, data)) 636 return true; 637 } 638 639 return false; 640 } 641 642 int dss_set_fck_rate(struct dss_device *dss, unsigned long rate) 643 { 644 int r; 645 646 DSSDBG("set fck to %lu\n", rate); 647 648 r = clk_set_rate(dss->dss_clk, rate); 649 if (r) 650 return r; 651 652 dss->dss_clk_rate = clk_get_rate(dss->dss_clk); 653 654 WARN_ONCE(dss->dss_clk_rate != rate, "clk rate mismatch: %lu != %lu", 655 dss->dss_clk_rate, rate); 656 657 return 0; 658 } 659 660 unsigned long dss_get_dispc_clk_rate(struct dss_device *dss) 661 { 662 return dss->dss_clk_rate; 663 } 664 665 unsigned long dss_get_max_fck_rate(struct dss_device *dss) 666 { 667 return dss->feat->fck_freq_max; 668 } 669 670 static int dss_setup_default_clock(struct dss_device *dss) 671 { 672 unsigned long max_dss_fck, prate; 673 unsigned long fck; 674 unsigned int fck_div; 675 int r; 676 677 max_dss_fck = dss->feat->fck_freq_max; 678 679 if (dss->parent_clk == NULL) { 680 fck = clk_round_rate(dss->dss_clk, max_dss_fck); 681 } else { 682 prate = clk_get_rate(dss->parent_clk); 683 684 fck_div = DIV_ROUND_UP(prate * dss->feat->dss_fck_multiplier, 685 max_dss_fck); 686 fck = DIV_ROUND_UP(prate, fck_div) 687 * dss->feat->dss_fck_multiplier; 688 } 689 690 r = dss_set_fck_rate(dss, fck); 691 if (r) 692 return r; 693 694 return 0; 695 } 696 697 void dss_set_venc_output(struct dss_device *dss, enum omap_dss_venc_type type) 698 { 699 int l = 0; 700 701 if (type == OMAP_DSS_VENC_TYPE_COMPOSITE) 702 l = 0; 703 else if (type == OMAP_DSS_VENC_TYPE_SVIDEO) 704 l = 1; 705 else 706 BUG(); 707 708 /* venc out selection. 0 = comp, 1 = svideo */ 709 REG_FLD_MOD(dss, DSS_CONTROL, l, 6, 6); 710 } 711 712 void dss_set_dac_pwrdn_bgz(struct dss_device *dss, bool enable) 713 { 714 /* DAC Power-Down Control */ 715 REG_FLD_MOD(dss, DSS_CONTROL, enable, 5, 5); 716 } 717 718 void dss_select_hdmi_venc_clk_source(struct dss_device *dss, 719 enum dss_hdmi_venc_clk_source_select src) 720 { 721 enum omap_dss_output_id outputs; 722 723 outputs = dss->feat->outputs[OMAP_DSS_CHANNEL_DIGIT]; 724 725 /* Complain about invalid selections */ 726 WARN_ON((src == DSS_VENC_TV_CLK) && !(outputs & OMAP_DSS_OUTPUT_VENC)); 727 WARN_ON((src == DSS_HDMI_M_PCLK) && !(outputs & OMAP_DSS_OUTPUT_HDMI)); 728 729 /* Select only if we have options */ 730 if ((outputs & OMAP_DSS_OUTPUT_VENC) && 731 (outputs & OMAP_DSS_OUTPUT_HDMI)) 732 /* VENC_HDMI_SWITCH */ 733 REG_FLD_MOD(dss, DSS_CONTROL, src, 15, 15); 734 } 735 736 static int dss_dpi_select_source_omap2_omap3(struct dss_device *dss, int port, 737 enum omap_channel channel) 738 { 739 if (channel != OMAP_DSS_CHANNEL_LCD) 740 return -EINVAL; 741 742 return 0; 743 } 744 745 static int dss_dpi_select_source_omap4(struct dss_device *dss, int port, 746 enum omap_channel channel) 747 { 748 int val; 749 750 switch (channel) { 751 case OMAP_DSS_CHANNEL_LCD2: 752 val = 0; 753 break; 754 case OMAP_DSS_CHANNEL_DIGIT: 755 val = 1; 756 break; 757 default: 758 return -EINVAL; 759 } 760 761 REG_FLD_MOD(dss, DSS_CONTROL, val, 17, 17); 762 763 return 0; 764 } 765 766 static int dss_dpi_select_source_omap5(struct dss_device *dss, int port, 767 enum omap_channel channel) 768 { 769 int val; 770 771 switch (channel) { 772 case OMAP_DSS_CHANNEL_LCD: 773 val = 1; 774 break; 775 case OMAP_DSS_CHANNEL_LCD2: 776 val = 2; 777 break; 778 case OMAP_DSS_CHANNEL_LCD3: 779 val = 3; 780 break; 781 case OMAP_DSS_CHANNEL_DIGIT: 782 val = 0; 783 break; 784 default: 785 return -EINVAL; 786 } 787 788 REG_FLD_MOD(dss, DSS_CONTROL, val, 17, 16); 789 790 return 0; 791 } 792 793 static int dss_dpi_select_source_dra7xx(struct dss_device *dss, int port, 794 enum omap_channel channel) 795 { 796 switch (port) { 797 case 0: 798 return dss_dpi_select_source_omap5(dss, port, channel); 799 case 1: 800 if (channel != OMAP_DSS_CHANNEL_LCD2) 801 return -EINVAL; 802 break; 803 case 2: 804 if (channel != OMAP_DSS_CHANNEL_LCD3) 805 return -EINVAL; 806 break; 807 default: 808 return -EINVAL; 809 } 810 811 return 0; 812 } 813 814 int dss_dpi_select_source(struct dss_device *dss, int port, 815 enum omap_channel channel) 816 { 817 return dss->feat->ops->dpi_select_source(dss, port, channel); 818 } 819 820 static int dss_get_clocks(struct dss_device *dss) 821 { 822 struct clk *clk; 823 824 clk = devm_clk_get(&dss->pdev->dev, "fck"); 825 if (IS_ERR(clk)) { 826 DSSERR("can't get clock fck\n"); 827 return PTR_ERR(clk); 828 } 829 830 dss->dss_clk = clk; 831 832 if (dss->feat->parent_clk_name) { 833 clk = clk_get(NULL, dss->feat->parent_clk_name); 834 if (IS_ERR(clk)) { 835 DSSERR("Failed to get %s\n", 836 dss->feat->parent_clk_name); 837 return PTR_ERR(clk); 838 } 839 } else { 840 clk = NULL; 841 } 842 843 dss->parent_clk = clk; 844 845 return 0; 846 } 847 848 static void dss_put_clocks(struct dss_device *dss) 849 { 850 if (dss->parent_clk) 851 clk_put(dss->parent_clk); 852 } 853 854 int dss_runtime_get(struct dss_device *dss) 855 { 856 int r; 857 858 DSSDBG("dss_runtime_get\n"); 859 860 r = pm_runtime_get_sync(&dss->pdev->dev); 861 if (WARN_ON(r < 0)) { 862 pm_runtime_put_noidle(&dss->pdev->dev); 863 return r; 864 } 865 return 0; 866 } 867 868 void dss_runtime_put(struct dss_device *dss) 869 { 870 int r; 871 872 DSSDBG("dss_runtime_put\n"); 873 874 r = pm_runtime_put_sync(&dss->pdev->dev); 875 WARN_ON(r < 0 && r != -ENOSYS && r != -EBUSY); 876 } 877 878 struct dss_device *dss_get_device(struct device *dev) 879 { 880 return dev_get_drvdata(dev); 881 } 882 883 /* DEBUGFS */ 884 #if defined(CONFIG_OMAP2_DSS_DEBUGFS) 885 static int dss_initialize_debugfs(struct dss_device *dss) 886 { 887 struct dentry *dir; 888 889 dir = debugfs_create_dir("omapdss", NULL); 890 if (IS_ERR(dir)) 891 return PTR_ERR(dir); 892 893 dss->debugfs.root = dir; 894 895 return 0; 896 } 897 898 static void dss_uninitialize_debugfs(struct dss_device *dss) 899 { 900 debugfs_remove_recursive(dss->debugfs.root); 901 } 902 903 struct dss_debugfs_entry { 904 struct dentry *dentry; 905 int (*show_fn)(struct seq_file *s, void *data); 906 void *data; 907 }; 908 909 static int dss_debug_open(struct inode *inode, struct file *file) 910 { 911 struct dss_debugfs_entry *entry = inode->i_private; 912 913 return single_open(file, entry->show_fn, entry->data); 914 } 915 916 static const struct file_operations dss_debug_fops = { 917 .open = dss_debug_open, 918 .read = seq_read, 919 .llseek = seq_lseek, 920 .release = single_release, 921 }; 922 923 struct dss_debugfs_entry * 924 dss_debugfs_create_file(struct dss_device *dss, const char *name, 925 int (*show_fn)(struct seq_file *s, void *data), 926 void *data) 927 { 928 struct dss_debugfs_entry *entry; 929 930 entry = kzalloc(sizeof(*entry), GFP_KERNEL); 931 if (!entry) 932 return ERR_PTR(-ENOMEM); 933 934 entry->show_fn = show_fn; 935 entry->data = data; 936 entry->dentry = debugfs_create_file(name, 0444, dss->debugfs.root, 937 entry, &dss_debug_fops); 938 939 return entry; 940 } 941 942 void dss_debugfs_remove_file(struct dss_debugfs_entry *entry) 943 { 944 if (IS_ERR_OR_NULL(entry)) 945 return; 946 947 debugfs_remove(entry->dentry); 948 kfree(entry); 949 } 950 951 #else /* CONFIG_OMAP2_DSS_DEBUGFS */ 952 static inline int dss_initialize_debugfs(struct dss_device *dss) 953 { 954 return 0; 955 } 956 static inline void dss_uninitialize_debugfs(struct dss_device *dss) 957 { 958 } 959 #endif /* CONFIG_OMAP2_DSS_DEBUGFS */ 960 961 static const struct dss_ops dss_ops_omap2_omap3 = { 962 .dpi_select_source = &dss_dpi_select_source_omap2_omap3, 963 }; 964 965 static const struct dss_ops dss_ops_omap4 = { 966 .dpi_select_source = &dss_dpi_select_source_omap4, 967 .select_lcd_source = &dss_lcd_clk_mux_omap4, 968 }; 969 970 static const struct dss_ops dss_ops_omap5 = { 971 .dpi_select_source = &dss_dpi_select_source_omap5, 972 .select_lcd_source = &dss_lcd_clk_mux_omap5, 973 }; 974 975 static const struct dss_ops dss_ops_dra7 = { 976 .dpi_select_source = &dss_dpi_select_source_dra7xx, 977 .select_lcd_source = &dss_lcd_clk_mux_dra7, 978 }; 979 980 static const enum omap_display_type omap2plus_ports[] = { 981 OMAP_DISPLAY_TYPE_DPI, 982 }; 983 984 static const enum omap_display_type omap34xx_ports[] = { 985 OMAP_DISPLAY_TYPE_DPI, 986 OMAP_DISPLAY_TYPE_SDI, 987 }; 988 989 static const enum omap_display_type dra7xx_ports[] = { 990 OMAP_DISPLAY_TYPE_DPI, 991 OMAP_DISPLAY_TYPE_DPI, 992 OMAP_DISPLAY_TYPE_DPI, 993 }; 994 995 static const enum omap_dss_output_id omap2_dss_supported_outputs[] = { 996 /* OMAP_DSS_CHANNEL_LCD */ 997 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI, 998 999 /* OMAP_DSS_CHANNEL_DIGIT */ 1000 OMAP_DSS_OUTPUT_VENC, 1001 }; 1002 1003 static const enum omap_dss_output_id omap3430_dss_supported_outputs[] = { 1004 /* OMAP_DSS_CHANNEL_LCD */ 1005 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI | 1006 OMAP_DSS_OUTPUT_SDI | OMAP_DSS_OUTPUT_DSI1, 1007 1008 /* OMAP_DSS_CHANNEL_DIGIT */ 1009 OMAP_DSS_OUTPUT_VENC, 1010 }; 1011 1012 static const enum omap_dss_output_id omap3630_dss_supported_outputs[] = { 1013 /* OMAP_DSS_CHANNEL_LCD */ 1014 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI | 1015 OMAP_DSS_OUTPUT_DSI1, 1016 1017 /* OMAP_DSS_CHANNEL_DIGIT */ 1018 OMAP_DSS_OUTPUT_VENC, 1019 }; 1020 1021 static const enum omap_dss_output_id am43xx_dss_supported_outputs[] = { 1022 /* OMAP_DSS_CHANNEL_LCD */ 1023 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI, 1024 }; 1025 1026 static const enum omap_dss_output_id omap4_dss_supported_outputs[] = { 1027 /* OMAP_DSS_CHANNEL_LCD */ 1028 OMAP_DSS_OUTPUT_DBI | OMAP_DSS_OUTPUT_DSI1, 1029 1030 /* OMAP_DSS_CHANNEL_DIGIT */ 1031 OMAP_DSS_OUTPUT_VENC | OMAP_DSS_OUTPUT_HDMI, 1032 1033 /* OMAP_DSS_CHANNEL_LCD2 */ 1034 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI | 1035 OMAP_DSS_OUTPUT_DSI2, 1036 }; 1037 1038 static const enum omap_dss_output_id omap5_dss_supported_outputs[] = { 1039 /* OMAP_DSS_CHANNEL_LCD */ 1040 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI | 1041 OMAP_DSS_OUTPUT_DSI1 | OMAP_DSS_OUTPUT_DSI2, 1042 1043 /* OMAP_DSS_CHANNEL_DIGIT */ 1044 OMAP_DSS_OUTPUT_HDMI, 1045 1046 /* OMAP_DSS_CHANNEL_LCD2 */ 1047 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI | 1048 OMAP_DSS_OUTPUT_DSI1, 1049 1050 /* OMAP_DSS_CHANNEL_LCD3 */ 1051 OMAP_DSS_OUTPUT_DPI | OMAP_DSS_OUTPUT_DBI | 1052 OMAP_DSS_OUTPUT_DSI2, 1053 }; 1054 1055 static const struct dss_features omap24xx_dss_feats = { 1056 .model = DSS_MODEL_OMAP2, 1057 /* 1058 * fck div max is really 16, but the divider range has gaps. The range 1059 * from 1 to 6 has no gaps, so let's use that as a max. 1060 */ 1061 .fck_div_max = 6, 1062 .fck_freq_max = 133000000, 1063 .dss_fck_multiplier = 2, 1064 .parent_clk_name = "core_ck", 1065 .ports = omap2plus_ports, 1066 .num_ports = ARRAY_SIZE(omap2plus_ports), 1067 .outputs = omap2_dss_supported_outputs, 1068 .ops = &dss_ops_omap2_omap3, 1069 .dispc_clk_switch = { 0, 0 }, 1070 .has_lcd_clk_src = false, 1071 }; 1072 1073 static const struct dss_features omap34xx_dss_feats = { 1074 .model = DSS_MODEL_OMAP3, 1075 .fck_div_max = 16, 1076 .fck_freq_max = 173000000, 1077 .dss_fck_multiplier = 2, 1078 .parent_clk_name = "dpll4_ck", 1079 .ports = omap34xx_ports, 1080 .outputs = omap3430_dss_supported_outputs, 1081 .num_ports = ARRAY_SIZE(omap34xx_ports), 1082 .ops = &dss_ops_omap2_omap3, 1083 .dispc_clk_switch = { 0, 0 }, 1084 .has_lcd_clk_src = false, 1085 }; 1086 1087 static const struct dss_features omap3630_dss_feats = { 1088 .model = DSS_MODEL_OMAP3, 1089 .fck_div_max = 31, 1090 .fck_freq_max = 173000000, 1091 .dss_fck_multiplier = 1, 1092 .parent_clk_name = "dpll4_ck", 1093 .ports = omap2plus_ports, 1094 .num_ports = ARRAY_SIZE(omap2plus_ports), 1095 .outputs = omap3630_dss_supported_outputs, 1096 .ops = &dss_ops_omap2_omap3, 1097 .dispc_clk_switch = { 0, 0 }, 1098 .has_lcd_clk_src = false, 1099 }; 1100 1101 static const struct dss_features omap44xx_dss_feats = { 1102 .model = DSS_MODEL_OMAP4, 1103 .fck_div_max = 32, 1104 .fck_freq_max = 186000000, 1105 .dss_fck_multiplier = 1, 1106 .parent_clk_name = "dpll_per_x2_ck", 1107 .ports = omap2plus_ports, 1108 .num_ports = ARRAY_SIZE(omap2plus_ports), 1109 .outputs = omap4_dss_supported_outputs, 1110 .ops = &dss_ops_omap4, 1111 .dispc_clk_switch = { 9, 8 }, 1112 .has_lcd_clk_src = true, 1113 }; 1114 1115 static const struct dss_features omap54xx_dss_feats = { 1116 .model = DSS_MODEL_OMAP5, 1117 .fck_div_max = 64, 1118 .fck_freq_max = 209250000, 1119 .dss_fck_multiplier = 1, 1120 .parent_clk_name = "dpll_per_x2_ck", 1121 .ports = omap2plus_ports, 1122 .num_ports = ARRAY_SIZE(omap2plus_ports), 1123 .outputs = omap5_dss_supported_outputs, 1124 .ops = &dss_ops_omap5, 1125 .dispc_clk_switch = { 9, 7 }, 1126 .has_lcd_clk_src = true, 1127 }; 1128 1129 static const struct dss_features am43xx_dss_feats = { 1130 .model = DSS_MODEL_OMAP3, 1131 .fck_div_max = 0, 1132 .fck_freq_max = 200000000, 1133 .dss_fck_multiplier = 0, 1134 .parent_clk_name = NULL, 1135 .ports = omap2plus_ports, 1136 .num_ports = ARRAY_SIZE(omap2plus_ports), 1137 .outputs = am43xx_dss_supported_outputs, 1138 .ops = &dss_ops_omap2_omap3, 1139 .dispc_clk_switch = { 0, 0 }, 1140 .has_lcd_clk_src = true, 1141 }; 1142 1143 static const struct dss_features dra7xx_dss_feats = { 1144 .model = DSS_MODEL_DRA7, 1145 .fck_div_max = 64, 1146 .fck_freq_max = 209250000, 1147 .dss_fck_multiplier = 1, 1148 .parent_clk_name = "dpll_per_x2_ck", 1149 .ports = dra7xx_ports, 1150 .num_ports = ARRAY_SIZE(dra7xx_ports), 1151 .outputs = omap5_dss_supported_outputs, 1152 .ops = &dss_ops_dra7, 1153 .dispc_clk_switch = { 9, 7 }, 1154 .has_lcd_clk_src = true, 1155 }; 1156 1157 static void __dss_uninit_ports(struct dss_device *dss, unsigned int num_ports) 1158 { 1159 struct platform_device *pdev = dss->pdev; 1160 struct device_node *parent = pdev->dev.of_node; 1161 struct device_node *port; 1162 unsigned int i; 1163 1164 for (i = 0; i < num_ports; i++) { 1165 port = of_graph_get_port_by_id(parent, i); 1166 if (!port) 1167 continue; 1168 1169 switch (dss->feat->ports[i]) { 1170 case OMAP_DISPLAY_TYPE_DPI: 1171 dpi_uninit_port(port); 1172 break; 1173 case OMAP_DISPLAY_TYPE_SDI: 1174 sdi_uninit_port(port); 1175 break; 1176 default: 1177 break; 1178 } 1179 of_node_put(port); 1180 } 1181 } 1182 1183 static int dss_init_ports(struct dss_device *dss) 1184 { 1185 struct platform_device *pdev = dss->pdev; 1186 struct device_node *parent = pdev->dev.of_node; 1187 struct device_node *port; 1188 unsigned int i; 1189 int r; 1190 1191 for (i = 0; i < dss->feat->num_ports; i++) { 1192 port = of_graph_get_port_by_id(parent, i); 1193 if (!port) 1194 continue; 1195 1196 switch (dss->feat->ports[i]) { 1197 case OMAP_DISPLAY_TYPE_DPI: 1198 r = dpi_init_port(dss, pdev, port, dss->feat->model); 1199 if (r) 1200 goto error; 1201 break; 1202 1203 case OMAP_DISPLAY_TYPE_SDI: 1204 r = sdi_init_port(dss, pdev, port); 1205 if (r) 1206 goto error; 1207 break; 1208 1209 default: 1210 break; 1211 } 1212 of_node_put(port); 1213 } 1214 1215 return 0; 1216 1217 error: 1218 of_node_put(port); 1219 __dss_uninit_ports(dss, i); 1220 return r; 1221 } 1222 1223 static void dss_uninit_ports(struct dss_device *dss) 1224 { 1225 __dss_uninit_ports(dss, dss->feat->num_ports); 1226 } 1227 1228 static int dss_video_pll_probe(struct dss_device *dss) 1229 { 1230 struct platform_device *pdev = dss->pdev; 1231 struct device_node *np = pdev->dev.of_node; 1232 struct regulator *pll_regulator; 1233 int r; 1234 1235 if (!np) 1236 return 0; 1237 1238 if (of_property_read_bool(np, "syscon-pll-ctrl")) { 1239 dss->syscon_pll_ctrl = syscon_regmap_lookup_by_phandle(np, 1240 "syscon-pll-ctrl"); 1241 if (IS_ERR(dss->syscon_pll_ctrl)) { 1242 dev_err(&pdev->dev, 1243 "failed to get syscon-pll-ctrl regmap\n"); 1244 return PTR_ERR(dss->syscon_pll_ctrl); 1245 } 1246 1247 if (of_property_read_u32_index(np, "syscon-pll-ctrl", 1, 1248 &dss->syscon_pll_ctrl_offset)) { 1249 dev_err(&pdev->dev, 1250 "failed to get syscon-pll-ctrl offset\n"); 1251 return -EINVAL; 1252 } 1253 } 1254 1255 pll_regulator = devm_regulator_get(&pdev->dev, "vdda_video"); 1256 if (IS_ERR(pll_regulator)) { 1257 r = PTR_ERR(pll_regulator); 1258 1259 switch (r) { 1260 case -ENOENT: 1261 pll_regulator = NULL; 1262 break; 1263 1264 case -EPROBE_DEFER: 1265 return -EPROBE_DEFER; 1266 1267 default: 1268 DSSERR("can't get DPLL VDDA regulator\n"); 1269 return r; 1270 } 1271 } 1272 1273 if (of_property_match_string(np, "reg-names", "pll1") >= 0) { 1274 dss->video1_pll = dss_video_pll_init(dss, pdev, 0, 1275 pll_regulator); 1276 if (IS_ERR(dss->video1_pll)) 1277 return PTR_ERR(dss->video1_pll); 1278 } 1279 1280 if (of_property_match_string(np, "reg-names", "pll2") >= 0) { 1281 dss->video2_pll = dss_video_pll_init(dss, pdev, 1, 1282 pll_regulator); 1283 if (IS_ERR(dss->video2_pll)) { 1284 dss_video_pll_uninit(dss->video1_pll); 1285 return PTR_ERR(dss->video2_pll); 1286 } 1287 } 1288 1289 return 0; 1290 } 1291 1292 /* DSS HW IP initialisation */ 1293 static const struct of_device_id dss_of_match[] = { 1294 { .compatible = "ti,omap2-dss", .data = &omap24xx_dss_feats }, 1295 { .compatible = "ti,omap3-dss", .data = &omap3630_dss_feats }, 1296 { .compatible = "ti,omap4-dss", .data = &omap44xx_dss_feats }, 1297 { .compatible = "ti,omap5-dss", .data = &omap54xx_dss_feats }, 1298 { .compatible = "ti,dra7-dss", .data = &dra7xx_dss_feats }, 1299 {}, 1300 }; 1301 MODULE_DEVICE_TABLE(of, dss_of_match); 1302 1303 static const struct soc_device_attribute dss_soc_devices[] = { 1304 { .machine = "OMAP3430/3530", .data = &omap34xx_dss_feats }, 1305 { .machine = "AM35??", .data = &omap34xx_dss_feats }, 1306 { .family = "AM43xx", .data = &am43xx_dss_feats }, 1307 { /* sentinel */ } 1308 }; 1309 1310 static int dss_bind(struct device *dev) 1311 { 1312 struct dss_device *dss = dev_get_drvdata(dev); 1313 struct platform_device *drm_pdev; 1314 struct dss_pdata pdata; 1315 int r; 1316 1317 r = component_bind_all(dev, NULL); 1318 if (r) 1319 return r; 1320 1321 pm_set_vt_switch(0); 1322 1323 pdata.dss = dss; 1324 drm_pdev = platform_device_register_data(NULL, "omapdrm", 0, 1325 &pdata, sizeof(pdata)); 1326 if (IS_ERR(drm_pdev)) { 1327 component_unbind_all(dev, NULL); 1328 return PTR_ERR(drm_pdev); 1329 } 1330 1331 dss->drm_pdev = drm_pdev; 1332 1333 return 0; 1334 } 1335 1336 static void dss_unbind(struct device *dev) 1337 { 1338 struct dss_device *dss = dev_get_drvdata(dev); 1339 1340 platform_device_unregister(dss->drm_pdev); 1341 1342 component_unbind_all(dev, NULL); 1343 } 1344 1345 static const struct component_master_ops dss_component_ops = { 1346 .bind = dss_bind, 1347 .unbind = dss_unbind, 1348 }; 1349 1350 struct dss_component_match_data { 1351 struct device *dev; 1352 struct component_match **match; 1353 }; 1354 1355 static int dss_add_child_component(struct device *dev, void *data) 1356 { 1357 struct dss_component_match_data *cmatch = data; 1358 struct component_match **match = cmatch->match; 1359 1360 /* 1361 * HACK 1362 * We don't have a working driver for rfbi, so skip it here always. 1363 * Otherwise dss will never get probed successfully, as it will wait 1364 * for rfbi to get probed. 1365 */ 1366 if (strstr(dev_name(dev), "rfbi")) 1367 return 0; 1368 1369 /* 1370 * Handle possible interconnect target modules defined within the DSS. 1371 * The DSS components can be children of an interconnect target module 1372 * after the device tree has been updated for the module data. 1373 * See also omapdss_boot_init() for compatible fixup. 1374 */ 1375 if (strstr(dev_name(dev), "target-module")) 1376 return device_for_each_child(dev, cmatch, 1377 dss_add_child_component); 1378 1379 component_match_add(cmatch->dev, match, component_compare_dev, dev); 1380 1381 return 0; 1382 } 1383 1384 static int dss_probe_hardware(struct dss_device *dss) 1385 { 1386 u32 rev; 1387 int r; 1388 1389 r = dss_runtime_get(dss); 1390 if (r) 1391 return r; 1392 1393 dss->dss_clk_rate = clk_get_rate(dss->dss_clk); 1394 1395 /* Select DPLL */ 1396 REG_FLD_MOD(dss, DSS_CONTROL, 0, 0, 0); 1397 1398 dss_select_dispc_clk_source(dss, DSS_CLK_SRC_FCK); 1399 1400 #ifdef CONFIG_OMAP2_DSS_VENC 1401 REG_FLD_MOD(dss, DSS_CONTROL, 1, 4, 4); /* venc dac demen */ 1402 REG_FLD_MOD(dss, DSS_CONTROL, 1, 3, 3); /* venc clock 4x enable */ 1403 REG_FLD_MOD(dss, DSS_CONTROL, 0, 2, 2); /* venc clock mode = normal */ 1404 #endif 1405 dss->dsi_clk_source[0] = DSS_CLK_SRC_FCK; 1406 dss->dsi_clk_source[1] = DSS_CLK_SRC_FCK; 1407 dss->dispc_clk_source = DSS_CLK_SRC_FCK; 1408 dss->lcd_clk_source[0] = DSS_CLK_SRC_FCK; 1409 dss->lcd_clk_source[1] = DSS_CLK_SRC_FCK; 1410 1411 rev = dss_read_reg(dss, DSS_REVISION); 1412 pr_info("OMAP DSS rev %d.%d\n", FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0)); 1413 1414 dss_runtime_put(dss); 1415 1416 return 0; 1417 } 1418 1419 static int dss_probe(struct platform_device *pdev) 1420 { 1421 const struct soc_device_attribute *soc; 1422 struct dss_component_match_data cmatch; 1423 struct component_match *match = NULL; 1424 struct dss_device *dss; 1425 int r; 1426 1427 dss = kzalloc(sizeof(*dss), GFP_KERNEL); 1428 if (!dss) 1429 return -ENOMEM; 1430 1431 dss->pdev = pdev; 1432 platform_set_drvdata(pdev, dss); 1433 1434 r = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32)); 1435 if (r) { 1436 dev_err(&pdev->dev, "Failed to set the DMA mask\n"); 1437 goto err_free_dss; 1438 } 1439 1440 /* 1441 * The various OMAP3-based SoCs can't be told apart using the compatible 1442 * string, use SoC device matching. 1443 */ 1444 soc = soc_device_match(dss_soc_devices); 1445 if (soc) 1446 dss->feat = soc->data; 1447 else 1448 dss->feat = of_match_device(dss_of_match, &pdev->dev)->data; 1449 1450 /* Map I/O registers, get and setup clocks. */ 1451 dss->base = devm_platform_ioremap_resource(pdev, 0); 1452 if (IS_ERR(dss->base)) { 1453 r = PTR_ERR(dss->base); 1454 goto err_free_dss; 1455 } 1456 1457 r = dss_get_clocks(dss); 1458 if (r) 1459 goto err_free_dss; 1460 1461 r = dss_setup_default_clock(dss); 1462 if (r) 1463 goto err_put_clocks; 1464 1465 /* Setup the video PLLs and the DPI and SDI ports. */ 1466 r = dss_video_pll_probe(dss); 1467 if (r) 1468 goto err_put_clocks; 1469 1470 r = dss_init_ports(dss); 1471 if (r) 1472 goto err_uninit_plls; 1473 1474 /* Enable runtime PM and probe the hardware. */ 1475 pm_runtime_enable(&pdev->dev); 1476 1477 r = dss_probe_hardware(dss); 1478 if (r) 1479 goto err_pm_runtime_disable; 1480 1481 /* Initialize debugfs. */ 1482 r = dss_initialize_debugfs(dss); 1483 if (r) 1484 goto err_pm_runtime_disable; 1485 1486 dss->debugfs.clk = dss_debugfs_create_file(dss, "clk", 1487 dss_debug_dump_clocks, dss); 1488 dss->debugfs.dss = dss_debugfs_create_file(dss, "dss", dss_dump_regs, 1489 dss); 1490 1491 /* Add all the child devices as components. */ 1492 r = of_platform_populate(pdev->dev.of_node, NULL, NULL, &pdev->dev); 1493 if (r) 1494 goto err_uninit_debugfs; 1495 1496 omapdss_gather_components(&pdev->dev); 1497 1498 cmatch.dev = &pdev->dev; 1499 cmatch.match = &match; 1500 device_for_each_child(&pdev->dev, &cmatch, dss_add_child_component); 1501 1502 r = component_master_add_with_match(&pdev->dev, &dss_component_ops, match); 1503 if (r) 1504 goto err_of_depopulate; 1505 1506 return 0; 1507 1508 err_of_depopulate: 1509 of_platform_depopulate(&pdev->dev); 1510 1511 err_uninit_debugfs: 1512 dss_debugfs_remove_file(dss->debugfs.clk); 1513 dss_debugfs_remove_file(dss->debugfs.dss); 1514 dss_uninitialize_debugfs(dss); 1515 1516 err_pm_runtime_disable: 1517 pm_runtime_disable(&pdev->dev); 1518 dss_uninit_ports(dss); 1519 1520 err_uninit_plls: 1521 if (dss->video1_pll) 1522 dss_video_pll_uninit(dss->video1_pll); 1523 if (dss->video2_pll) 1524 dss_video_pll_uninit(dss->video2_pll); 1525 1526 err_put_clocks: 1527 dss_put_clocks(dss); 1528 1529 err_free_dss: 1530 kfree(dss); 1531 1532 return r; 1533 } 1534 1535 static int dss_remove(struct platform_device *pdev) 1536 { 1537 struct dss_device *dss = platform_get_drvdata(pdev); 1538 1539 of_platform_depopulate(&pdev->dev); 1540 1541 component_master_del(&pdev->dev, &dss_component_ops); 1542 1543 dss_debugfs_remove_file(dss->debugfs.clk); 1544 dss_debugfs_remove_file(dss->debugfs.dss); 1545 dss_uninitialize_debugfs(dss); 1546 1547 pm_runtime_disable(&pdev->dev); 1548 1549 dss_uninit_ports(dss); 1550 1551 if (dss->video1_pll) 1552 dss_video_pll_uninit(dss->video1_pll); 1553 1554 if (dss->video2_pll) 1555 dss_video_pll_uninit(dss->video2_pll); 1556 1557 dss_put_clocks(dss); 1558 1559 kfree(dss); 1560 1561 return 0; 1562 } 1563 1564 static void dss_shutdown(struct platform_device *pdev) 1565 { 1566 DSSDBG("shutdown\n"); 1567 } 1568 1569 static __maybe_unused int dss_runtime_suspend(struct device *dev) 1570 { 1571 struct dss_device *dss = dev_get_drvdata(dev); 1572 1573 dss_save_context(dss); 1574 dss_set_min_bus_tput(dev, 0); 1575 1576 pinctrl_pm_select_sleep_state(dev); 1577 1578 return 0; 1579 } 1580 1581 static __maybe_unused int dss_runtime_resume(struct device *dev) 1582 { 1583 struct dss_device *dss = dev_get_drvdata(dev); 1584 int r; 1585 1586 pinctrl_pm_select_default_state(dev); 1587 1588 /* 1589 * Set an arbitrarily high tput request to ensure OPP100. 1590 * What we should really do is to make a request to stay in OPP100, 1591 * without any tput requirements, but that is not currently possible 1592 * via the PM layer. 1593 */ 1594 1595 r = dss_set_min_bus_tput(dev, 1000000000); 1596 if (r) 1597 return r; 1598 1599 dss_restore_context(dss); 1600 return 0; 1601 } 1602 1603 static const struct dev_pm_ops dss_pm_ops = { 1604 SET_RUNTIME_PM_OPS(dss_runtime_suspend, dss_runtime_resume, NULL) 1605 SET_LATE_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume) 1606 }; 1607 1608 struct platform_driver omap_dsshw_driver = { 1609 .probe = dss_probe, 1610 .remove = dss_remove, 1611 .shutdown = dss_shutdown, 1612 .driver = { 1613 .name = "omapdss_dss", 1614 .pm = &dss_pm_ops, 1615 .of_match_table = dss_of_match, 1616 .suppress_bind_attrs = true, 1617 }, 1618 }; 1619 1620 /* INIT */ 1621 static struct platform_driver * const omap_dss_drivers[] = { 1622 &omap_dsshw_driver, 1623 &omap_dispchw_driver, 1624 #ifdef CONFIG_OMAP2_DSS_DSI 1625 &omap_dsihw_driver, 1626 #endif 1627 #ifdef CONFIG_OMAP2_DSS_VENC 1628 &omap_venchw_driver, 1629 #endif 1630 #ifdef CONFIG_OMAP4_DSS_HDMI 1631 &omapdss_hdmi4hw_driver, 1632 #endif 1633 #ifdef CONFIG_OMAP5_DSS_HDMI 1634 &omapdss_hdmi5hw_driver, 1635 #endif 1636 }; 1637 1638 int __init omap_dss_init(void) 1639 { 1640 return platform_register_drivers(omap_dss_drivers, 1641 ARRAY_SIZE(omap_dss_drivers)); 1642 } 1643 1644 void omap_dss_exit(void) 1645 { 1646 platform_unregister_drivers(omap_dss_drivers, 1647 ARRAY_SIZE(omap_dss_drivers)); 1648 } 1649