1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * linux/drivers/video/omap2/dss/dss.c 4 * 5 * Copyright (C) 2009 Nokia Corporation 6 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com> 7 * 8 * Some code and ideas taken from drivers/video/omap/ driver 9 * by Imre Deak. 10 */ 11 12 #define DSS_SUBSYS_NAME "DSS" 13 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/platform_device.h> 23 #include <linux/pm_runtime.h> 24 #include <linux/gfp.h> 25 #include <linux/sizes.h> 26 #include <linux/mfd/syscon.h> 27 #include <linux/regmap.h> 28 #include <linux/of.h> 29 #include <linux/regulator/consumer.h> 30 #include <linux/suspend.h> 31 #include <linux/component.h> 32 #include <linux/pinctrl/consumer.h> 33 34 #include <video/omapfb_dss.h> 35 36 #include "dss.h" 37 #include "dss_features.h" 38 39 #define DSS_SZ_REGS SZ_512 40 41 struct dss_reg { 42 u16 idx; 43 }; 44 45 #define DSS_REG(idx) ((const struct dss_reg) { idx }) 46 47 #define DSS_REVISION DSS_REG(0x0000) 48 #define DSS_SYSCONFIG DSS_REG(0x0010) 49 #define DSS_SYSSTATUS DSS_REG(0x0014) 50 #define DSS_CONTROL DSS_REG(0x0040) 51 #define DSS_SDI_CONTROL DSS_REG(0x0044) 52 #define DSS_PLL_CONTROL DSS_REG(0x0048) 53 #define DSS_SDI_STATUS DSS_REG(0x005C) 54 55 #define REG_GET(idx, start, end) \ 56 FLD_GET(dss_read_reg(idx), start, end) 57 58 #define REG_FLD_MOD(idx, val, start, end) \ 59 dss_write_reg(idx, FLD_MOD(dss_read_reg(idx), val, start, end)) 60 61 struct dss_features { 62 u8 fck_div_max; 63 u8 dss_fck_multiplier; 64 const char *parent_clk_name; 65 const enum omap_display_type *ports; 66 int num_ports; 67 int (*dpi_select_source)(int port, enum omap_channel channel); 68 }; 69 70 static struct { 71 struct platform_device *pdev; 72 void __iomem *base; 73 struct regmap *syscon_pll_ctrl; 74 u32 syscon_pll_ctrl_offset; 75 76 struct clk *parent_clk; 77 struct clk *dss_clk; 78 unsigned long dss_clk_rate; 79 80 unsigned long cache_req_pck; 81 unsigned long cache_prate; 82 struct dispc_clock_info cache_dispc_cinfo; 83 84 enum omap_dss_clk_source dsi_clk_source[MAX_NUM_DSI]; 85 enum omap_dss_clk_source dispc_clk_source; 86 enum omap_dss_clk_source lcd_clk_source[MAX_DSS_LCD_MANAGERS]; 87 88 bool ctx_valid; 89 u32 ctx[DSS_SZ_REGS / sizeof(u32)]; 90 91 const struct dss_features *feat; 92 93 struct dss_pll *video1_pll; 94 struct dss_pll *video2_pll; 95 } dss; 96 97 static const char * const dss_generic_clk_source_names[] = { 98 [OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC] = "DSI_PLL_HSDIV_DISPC", 99 [OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DSI] = "DSI_PLL_HSDIV_DSI", 100 [OMAP_DSS_CLK_SRC_FCK] = "DSS_FCK", 101 [OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DISPC] = "DSI_PLL2_HSDIV_DISPC", 102 [OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DSI] = "DSI_PLL2_HSDIV_DSI", 103 }; 104 105 static bool dss_initialized; 106 107 bool omapdss_is_initialized(void) 108 { 109 return dss_initialized; 110 } 111 EXPORT_SYMBOL(omapdss_is_initialized); 112 113 static inline void dss_write_reg(const struct dss_reg idx, u32 val) 114 { 115 __raw_writel(val, dss.base + idx.idx); 116 } 117 118 static inline u32 dss_read_reg(const struct dss_reg idx) 119 { 120 return __raw_readl(dss.base + idx.idx); 121 } 122 123 #define SR(reg) \ 124 dss.ctx[(DSS_##reg).idx / sizeof(u32)] = dss_read_reg(DSS_##reg) 125 #define RR(reg) \ 126 dss_write_reg(DSS_##reg, dss.ctx[(DSS_##reg).idx / sizeof(u32)]) 127 128 static void dss_save_context(void) 129 { 130 DSSDBG("dss_save_context\n"); 131 132 SR(CONTROL); 133 134 if (dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_LCD) & 135 OMAP_DISPLAY_TYPE_SDI) { 136 SR(SDI_CONTROL); 137 SR(PLL_CONTROL); 138 } 139 140 dss.ctx_valid = true; 141 142 DSSDBG("context saved\n"); 143 } 144 145 static void dss_restore_context(void) 146 { 147 DSSDBG("dss_restore_context\n"); 148 149 if (!dss.ctx_valid) 150 return; 151 152 RR(CONTROL); 153 154 if (dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_LCD) & 155 OMAP_DISPLAY_TYPE_SDI) { 156 RR(SDI_CONTROL); 157 RR(PLL_CONTROL); 158 } 159 160 DSSDBG("context restored\n"); 161 } 162 163 #undef SR 164 #undef RR 165 166 void dss_ctrl_pll_enable(enum dss_pll_id pll_id, bool enable) 167 { 168 unsigned shift; 169 unsigned val; 170 171 if (!dss.syscon_pll_ctrl) 172 return; 173 174 val = !enable; 175 176 switch (pll_id) { 177 case DSS_PLL_VIDEO1: 178 shift = 0; 179 break; 180 case DSS_PLL_VIDEO2: 181 shift = 1; 182 break; 183 case DSS_PLL_HDMI: 184 shift = 2; 185 break; 186 default: 187 DSSERR("illegal DSS PLL ID %d\n", pll_id); 188 return; 189 } 190 191 regmap_update_bits(dss.syscon_pll_ctrl, dss.syscon_pll_ctrl_offset, 192 1 << shift, val << shift); 193 } 194 195 void dss_ctrl_pll_set_control_mux(enum dss_pll_id pll_id, 196 enum omap_channel channel) 197 { 198 unsigned shift, val; 199 200 if (!dss.syscon_pll_ctrl) 201 return; 202 203 switch (channel) { 204 case OMAP_DSS_CHANNEL_LCD: 205 shift = 3; 206 207 switch (pll_id) { 208 case DSS_PLL_VIDEO1: 209 val = 0; break; 210 case DSS_PLL_HDMI: 211 val = 1; break; 212 default: 213 DSSERR("error in PLL mux config for LCD\n"); 214 return; 215 } 216 217 break; 218 case OMAP_DSS_CHANNEL_LCD2: 219 shift = 5; 220 221 switch (pll_id) { 222 case DSS_PLL_VIDEO1: 223 val = 0; break; 224 case DSS_PLL_VIDEO2: 225 val = 1; break; 226 case DSS_PLL_HDMI: 227 val = 2; break; 228 default: 229 DSSERR("error in PLL mux config for LCD2\n"); 230 return; 231 } 232 233 break; 234 case OMAP_DSS_CHANNEL_LCD3: 235 shift = 7; 236 237 switch (pll_id) { 238 case DSS_PLL_VIDEO1: 239 val = 1; break; 240 case DSS_PLL_VIDEO2: 241 val = 0; break; 242 case DSS_PLL_HDMI: 243 val = 2; break; 244 default: 245 DSSERR("error in PLL mux config for LCD3\n"); 246 return; 247 } 248 249 break; 250 default: 251 DSSERR("error in PLL mux config\n"); 252 return; 253 } 254 255 regmap_update_bits(dss.syscon_pll_ctrl, dss.syscon_pll_ctrl_offset, 256 0x3 << shift, val << shift); 257 } 258 259 void dss_sdi_init(int datapairs) 260 { 261 u32 l; 262 263 BUG_ON(datapairs > 3 || datapairs < 1); 264 265 l = dss_read_reg(DSS_SDI_CONTROL); 266 l = FLD_MOD(l, 0xf, 19, 15); /* SDI_PDIV */ 267 l = FLD_MOD(l, datapairs-1, 3, 2); /* SDI_PRSEL */ 268 l = FLD_MOD(l, 2, 1, 0); /* SDI_BWSEL */ 269 dss_write_reg(DSS_SDI_CONTROL, l); 270 271 l = dss_read_reg(DSS_PLL_CONTROL); 272 l = FLD_MOD(l, 0x7, 25, 22); /* SDI_PLL_FREQSEL */ 273 l = FLD_MOD(l, 0xb, 16, 11); /* SDI_PLL_REGN */ 274 l = FLD_MOD(l, 0xb4, 10, 1); /* SDI_PLL_REGM */ 275 dss_write_reg(DSS_PLL_CONTROL, l); 276 } 277 278 int dss_sdi_enable(void) 279 { 280 unsigned long timeout; 281 282 dispc_pck_free_enable(1); 283 284 /* Reset SDI PLL */ 285 REG_FLD_MOD(DSS_PLL_CONTROL, 1, 18, 18); /* SDI_PLL_SYSRESET */ 286 udelay(1); /* wait 2x PCLK */ 287 288 /* Lock SDI PLL */ 289 REG_FLD_MOD(DSS_PLL_CONTROL, 1, 28, 28); /* SDI_PLL_GOBIT */ 290 291 /* Waiting for PLL lock request to complete */ 292 timeout = jiffies + msecs_to_jiffies(500); 293 while (dss_read_reg(DSS_SDI_STATUS) & (1 << 6)) { 294 if (time_after_eq(jiffies, timeout)) { 295 DSSERR("PLL lock request timed out\n"); 296 goto err1; 297 } 298 } 299 300 /* Clearing PLL_GO bit */ 301 REG_FLD_MOD(DSS_PLL_CONTROL, 0, 28, 28); 302 303 /* Waiting for PLL to lock */ 304 timeout = jiffies + msecs_to_jiffies(500); 305 while (!(dss_read_reg(DSS_SDI_STATUS) & (1 << 5))) { 306 if (time_after_eq(jiffies, timeout)) { 307 DSSERR("PLL lock timed out\n"); 308 goto err1; 309 } 310 } 311 312 dispc_lcd_enable_signal(1); 313 314 /* Waiting for SDI reset to complete */ 315 timeout = jiffies + msecs_to_jiffies(500); 316 while (!(dss_read_reg(DSS_SDI_STATUS) & (1 << 2))) { 317 if (time_after_eq(jiffies, timeout)) { 318 DSSERR("SDI reset timed out\n"); 319 goto err2; 320 } 321 } 322 323 return 0; 324 325 err2: 326 dispc_lcd_enable_signal(0); 327 err1: 328 /* Reset SDI PLL */ 329 REG_FLD_MOD(DSS_PLL_CONTROL, 0, 18, 18); /* SDI_PLL_SYSRESET */ 330 331 dispc_pck_free_enable(0); 332 333 return -ETIMEDOUT; 334 } 335 336 void dss_sdi_disable(void) 337 { 338 dispc_lcd_enable_signal(0); 339 340 dispc_pck_free_enable(0); 341 342 /* Reset SDI PLL */ 343 REG_FLD_MOD(DSS_PLL_CONTROL, 0, 18, 18); /* SDI_PLL_SYSRESET */ 344 } 345 346 const char *dss_get_generic_clk_source_name(enum omap_dss_clk_source clk_src) 347 { 348 return dss_generic_clk_source_names[clk_src]; 349 } 350 351 void dss_dump_clocks(struct seq_file *s) 352 { 353 const char *fclk_name, *fclk_real_name; 354 unsigned long fclk_rate; 355 356 if (dss_runtime_get()) 357 return; 358 359 seq_printf(s, "- DSS -\n"); 360 361 fclk_name = dss_get_generic_clk_source_name(OMAP_DSS_CLK_SRC_FCK); 362 fclk_real_name = dss_feat_get_clk_source_name(OMAP_DSS_CLK_SRC_FCK); 363 fclk_rate = clk_get_rate(dss.dss_clk); 364 365 seq_printf(s, "%s (%s) = %lu\n", 366 fclk_name, fclk_real_name, 367 fclk_rate); 368 369 dss_runtime_put(); 370 } 371 372 static void dss_dump_regs(struct seq_file *s) 373 { 374 #define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, dss_read_reg(r)) 375 376 if (dss_runtime_get()) 377 return; 378 379 DUMPREG(DSS_REVISION); 380 DUMPREG(DSS_SYSCONFIG); 381 DUMPREG(DSS_SYSSTATUS); 382 DUMPREG(DSS_CONTROL); 383 384 if (dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_LCD) & 385 OMAP_DISPLAY_TYPE_SDI) { 386 DUMPREG(DSS_SDI_CONTROL); 387 DUMPREG(DSS_PLL_CONTROL); 388 DUMPREG(DSS_SDI_STATUS); 389 } 390 391 dss_runtime_put(); 392 #undef DUMPREG 393 } 394 395 static void dss_select_dispc_clk_source(enum omap_dss_clk_source clk_src) 396 { 397 int b; 398 u8 start, end; 399 400 switch (clk_src) { 401 case OMAP_DSS_CLK_SRC_FCK: 402 b = 0; 403 break; 404 case OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC: 405 b = 1; 406 break; 407 case OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DISPC: 408 b = 2; 409 break; 410 default: 411 BUG(); 412 return; 413 } 414 415 dss_feat_get_reg_field(FEAT_REG_DISPC_CLK_SWITCH, &start, &end); 416 417 REG_FLD_MOD(DSS_CONTROL, b, start, end); /* DISPC_CLK_SWITCH */ 418 419 dss.dispc_clk_source = clk_src; 420 } 421 422 void dss_select_dsi_clk_source(int dsi_module, 423 enum omap_dss_clk_source clk_src) 424 { 425 int b, pos; 426 427 switch (clk_src) { 428 case OMAP_DSS_CLK_SRC_FCK: 429 b = 0; 430 break; 431 case OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DSI: 432 BUG_ON(dsi_module != 0); 433 b = 1; 434 break; 435 case OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DSI: 436 BUG_ON(dsi_module != 1); 437 b = 1; 438 break; 439 default: 440 BUG(); 441 return; 442 } 443 444 pos = dsi_module == 0 ? 1 : 10; 445 REG_FLD_MOD(DSS_CONTROL, b, pos, pos); /* DSIx_CLK_SWITCH */ 446 447 dss.dsi_clk_source[dsi_module] = clk_src; 448 } 449 450 void dss_select_lcd_clk_source(enum omap_channel channel, 451 enum omap_dss_clk_source clk_src) 452 { 453 int b, ix, pos; 454 455 if (!dss_has_feature(FEAT_LCD_CLK_SRC)) { 456 dss_select_dispc_clk_source(clk_src); 457 return; 458 } 459 460 switch (clk_src) { 461 case OMAP_DSS_CLK_SRC_FCK: 462 b = 0; 463 break; 464 case OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC: 465 BUG_ON(channel != OMAP_DSS_CHANNEL_LCD); 466 b = 1; 467 break; 468 case OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DISPC: 469 BUG_ON(channel != OMAP_DSS_CHANNEL_LCD2 && 470 channel != OMAP_DSS_CHANNEL_LCD3); 471 b = 1; 472 break; 473 default: 474 BUG(); 475 return; 476 } 477 478 pos = channel == OMAP_DSS_CHANNEL_LCD ? 0 : 479 (channel == OMAP_DSS_CHANNEL_LCD2 ? 12 : 19); 480 REG_FLD_MOD(DSS_CONTROL, b, pos, pos); /* LCDx_CLK_SWITCH */ 481 482 ix = channel == OMAP_DSS_CHANNEL_LCD ? 0 : 483 (channel == OMAP_DSS_CHANNEL_LCD2 ? 1 : 2); 484 dss.lcd_clk_source[ix] = clk_src; 485 } 486 487 enum omap_dss_clk_source dss_get_dispc_clk_source(void) 488 { 489 return dss.dispc_clk_source; 490 } 491 492 enum omap_dss_clk_source dss_get_dsi_clk_source(int dsi_module) 493 { 494 return dss.dsi_clk_source[dsi_module]; 495 } 496 497 enum omap_dss_clk_source dss_get_lcd_clk_source(enum omap_channel channel) 498 { 499 if (dss_has_feature(FEAT_LCD_CLK_SRC)) { 500 int ix = channel == OMAP_DSS_CHANNEL_LCD ? 0 : 501 (channel == OMAP_DSS_CHANNEL_LCD2 ? 1 : 2); 502 return dss.lcd_clk_source[ix]; 503 } else { 504 /* LCD_CLK source is the same as DISPC_FCLK source for 505 * OMAP2 and OMAP3 */ 506 return dss.dispc_clk_source; 507 } 508 } 509 510 bool dss_div_calc(unsigned long pck, unsigned long fck_min, 511 dss_div_calc_func func, void *data) 512 { 513 int fckd, fckd_start, fckd_stop; 514 unsigned long fck; 515 unsigned long fck_hw_max; 516 unsigned long fckd_hw_max; 517 unsigned long prate; 518 unsigned m; 519 520 fck_hw_max = dss_feat_get_param_max(FEAT_PARAM_DSS_FCK); 521 522 if (dss.parent_clk == NULL) { 523 unsigned pckd; 524 525 pckd = fck_hw_max / pck; 526 527 fck = pck * pckd; 528 529 fck = clk_round_rate(dss.dss_clk, fck); 530 531 return func(fck, data); 532 } 533 534 fckd_hw_max = dss.feat->fck_div_max; 535 536 m = dss.feat->dss_fck_multiplier; 537 prate = clk_get_rate(dss.parent_clk); 538 539 fck_min = fck_min ? fck_min : 1; 540 541 fckd_start = min(prate * m / fck_min, fckd_hw_max); 542 fckd_stop = max(DIV_ROUND_UP(prate * m, fck_hw_max), 1ul); 543 544 for (fckd = fckd_start; fckd >= fckd_stop; --fckd) { 545 fck = DIV_ROUND_UP(prate, fckd) * m; 546 547 if (func(fck, data)) 548 return true; 549 } 550 551 return false; 552 } 553 554 int dss_set_fck_rate(unsigned long rate) 555 { 556 int r; 557 558 DSSDBG("set fck to %lu\n", rate); 559 560 r = clk_set_rate(dss.dss_clk, rate); 561 if (r) 562 return r; 563 564 dss.dss_clk_rate = clk_get_rate(dss.dss_clk); 565 566 WARN_ONCE(dss.dss_clk_rate != rate, 567 "clk rate mismatch: %lu != %lu", dss.dss_clk_rate, 568 rate); 569 570 return 0; 571 } 572 573 unsigned long dss_get_dispc_clk_rate(void) 574 { 575 return dss.dss_clk_rate; 576 } 577 578 static int dss_setup_default_clock(void) 579 { 580 unsigned long max_dss_fck, prate; 581 unsigned long fck; 582 unsigned fck_div; 583 int r; 584 585 max_dss_fck = dss_feat_get_param_max(FEAT_PARAM_DSS_FCK); 586 587 if (dss.parent_clk == NULL) { 588 fck = clk_round_rate(dss.dss_clk, max_dss_fck); 589 } else { 590 prate = clk_get_rate(dss.parent_clk); 591 592 fck_div = DIV_ROUND_UP(prate * dss.feat->dss_fck_multiplier, 593 max_dss_fck); 594 fck = DIV_ROUND_UP(prate, fck_div) * dss.feat->dss_fck_multiplier; 595 } 596 597 r = dss_set_fck_rate(fck); 598 if (r) 599 return r; 600 601 return 0; 602 } 603 604 void dss_set_venc_output(enum omap_dss_venc_type type) 605 { 606 int l = 0; 607 608 if (type == OMAP_DSS_VENC_TYPE_COMPOSITE) 609 l = 0; 610 else if (type == OMAP_DSS_VENC_TYPE_SVIDEO) 611 l = 1; 612 else 613 BUG(); 614 615 /* venc out selection. 0 = comp, 1 = svideo */ 616 REG_FLD_MOD(DSS_CONTROL, l, 6, 6); 617 } 618 619 void dss_set_dac_pwrdn_bgz(bool enable) 620 { 621 REG_FLD_MOD(DSS_CONTROL, enable, 5, 5); /* DAC Power-Down Control */ 622 } 623 624 void dss_select_hdmi_venc_clk_source(enum dss_hdmi_venc_clk_source_select src) 625 { 626 enum omap_display_type dp; 627 dp = dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_DIGIT); 628 629 /* Complain about invalid selections */ 630 WARN_ON((src == DSS_VENC_TV_CLK) && !(dp & OMAP_DISPLAY_TYPE_VENC)); 631 WARN_ON((src == DSS_HDMI_M_PCLK) && !(dp & OMAP_DISPLAY_TYPE_HDMI)); 632 633 /* Select only if we have options */ 634 if ((dp & OMAP_DISPLAY_TYPE_VENC) && (dp & OMAP_DISPLAY_TYPE_HDMI)) 635 REG_FLD_MOD(DSS_CONTROL, src, 15, 15); /* VENC_HDMI_SWITCH */ 636 } 637 638 enum dss_hdmi_venc_clk_source_select dss_get_hdmi_venc_clk_source(void) 639 { 640 enum omap_display_type displays; 641 642 displays = dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_DIGIT); 643 if ((displays & OMAP_DISPLAY_TYPE_HDMI) == 0) 644 return DSS_VENC_TV_CLK; 645 646 if ((displays & OMAP_DISPLAY_TYPE_VENC) == 0) 647 return DSS_HDMI_M_PCLK; 648 649 return REG_GET(DSS_CONTROL, 15, 15); 650 } 651 652 static int dss_dpi_select_source_omap2_omap3(int port, enum omap_channel channel) 653 { 654 if (channel != OMAP_DSS_CHANNEL_LCD) 655 return -EINVAL; 656 657 return 0; 658 } 659 660 static int dss_dpi_select_source_omap4(int port, enum omap_channel channel) 661 { 662 int val; 663 664 switch (channel) { 665 case OMAP_DSS_CHANNEL_LCD2: 666 val = 0; 667 break; 668 case OMAP_DSS_CHANNEL_DIGIT: 669 val = 1; 670 break; 671 default: 672 return -EINVAL; 673 } 674 675 REG_FLD_MOD(DSS_CONTROL, val, 17, 17); 676 677 return 0; 678 } 679 680 static int dss_dpi_select_source_omap5(int port, enum omap_channel channel) 681 { 682 int val; 683 684 switch (channel) { 685 case OMAP_DSS_CHANNEL_LCD: 686 val = 1; 687 break; 688 case OMAP_DSS_CHANNEL_LCD2: 689 val = 2; 690 break; 691 case OMAP_DSS_CHANNEL_LCD3: 692 val = 3; 693 break; 694 case OMAP_DSS_CHANNEL_DIGIT: 695 val = 0; 696 break; 697 default: 698 return -EINVAL; 699 } 700 701 REG_FLD_MOD(DSS_CONTROL, val, 17, 16); 702 703 return 0; 704 } 705 706 static int dss_dpi_select_source_dra7xx(int port, enum omap_channel channel) 707 { 708 switch (port) { 709 case 0: 710 return dss_dpi_select_source_omap5(port, channel); 711 case 1: 712 if (channel != OMAP_DSS_CHANNEL_LCD2) 713 return -EINVAL; 714 break; 715 case 2: 716 if (channel != OMAP_DSS_CHANNEL_LCD3) 717 return -EINVAL; 718 break; 719 default: 720 return -EINVAL; 721 } 722 723 return 0; 724 } 725 726 int dss_dpi_select_source(int port, enum omap_channel channel) 727 { 728 return dss.feat->dpi_select_source(port, channel); 729 } 730 731 static int dss_get_clocks(void) 732 { 733 struct clk *clk; 734 735 clk = devm_clk_get(&dss.pdev->dev, "fck"); 736 if (IS_ERR(clk)) { 737 DSSERR("can't get clock fck\n"); 738 return PTR_ERR(clk); 739 } 740 741 dss.dss_clk = clk; 742 743 if (dss.feat->parent_clk_name) { 744 clk = clk_get(NULL, dss.feat->parent_clk_name); 745 if (IS_ERR(clk)) { 746 DSSERR("Failed to get %s\n", dss.feat->parent_clk_name); 747 return PTR_ERR(clk); 748 } 749 } else { 750 clk = NULL; 751 } 752 753 dss.parent_clk = clk; 754 755 return 0; 756 } 757 758 static void dss_put_clocks(void) 759 { 760 if (dss.parent_clk) 761 clk_put(dss.parent_clk); 762 } 763 764 int dss_runtime_get(void) 765 { 766 int r; 767 768 DSSDBG("dss_runtime_get\n"); 769 770 r = pm_runtime_resume_and_get(&dss.pdev->dev); 771 if (WARN_ON(r < 0)) 772 return r; 773 return 0; 774 } 775 776 void dss_runtime_put(void) 777 { 778 int r; 779 780 DSSDBG("dss_runtime_put\n"); 781 782 r = pm_runtime_put_sync(&dss.pdev->dev); 783 WARN_ON(r < 0 && r != -ENOSYS && r != -EBUSY); 784 } 785 786 /* DEBUGFS */ 787 #if defined(CONFIG_FB_OMAP2_DSS_DEBUGFS) 788 void dss_debug_dump_clocks(struct seq_file *s) 789 { 790 dss_dump_clocks(s); 791 dispc_dump_clocks(s); 792 #ifdef CONFIG_FB_OMAP2_DSS_DSI 793 dsi_dump_clocks(s); 794 #endif 795 } 796 #endif 797 798 799 static const enum omap_display_type omap2plus_ports[] = { 800 OMAP_DISPLAY_TYPE_DPI, 801 }; 802 803 static const enum omap_display_type omap34xx_ports[] = { 804 OMAP_DISPLAY_TYPE_DPI, 805 OMAP_DISPLAY_TYPE_SDI, 806 }; 807 808 static const enum omap_display_type dra7xx_ports[] = { 809 OMAP_DISPLAY_TYPE_DPI, 810 OMAP_DISPLAY_TYPE_DPI, 811 OMAP_DISPLAY_TYPE_DPI, 812 }; 813 814 static const struct dss_features omap24xx_dss_feats = { 815 /* 816 * fck div max is really 16, but the divider range has gaps. The range 817 * from 1 to 6 has no gaps, so let's use that as a max. 818 */ 819 .fck_div_max = 6, 820 .dss_fck_multiplier = 2, 821 .parent_clk_name = "core_ck", 822 .dpi_select_source = &dss_dpi_select_source_omap2_omap3, 823 .ports = omap2plus_ports, 824 .num_ports = ARRAY_SIZE(omap2plus_ports), 825 }; 826 827 static const struct dss_features omap34xx_dss_feats = { 828 .fck_div_max = 16, 829 .dss_fck_multiplier = 2, 830 .parent_clk_name = "dpll4_ck", 831 .dpi_select_source = &dss_dpi_select_source_omap2_omap3, 832 .ports = omap34xx_ports, 833 .num_ports = ARRAY_SIZE(omap34xx_ports), 834 }; 835 836 static const struct dss_features omap3630_dss_feats = { 837 .fck_div_max = 31, 838 .dss_fck_multiplier = 1, 839 .parent_clk_name = "dpll4_ck", 840 .dpi_select_source = &dss_dpi_select_source_omap2_omap3, 841 .ports = omap2plus_ports, 842 .num_ports = ARRAY_SIZE(omap2plus_ports), 843 }; 844 845 static const struct dss_features omap44xx_dss_feats = { 846 .fck_div_max = 32, 847 .dss_fck_multiplier = 1, 848 .parent_clk_name = "dpll_per_x2_ck", 849 .dpi_select_source = &dss_dpi_select_source_omap4, 850 .ports = omap2plus_ports, 851 .num_ports = ARRAY_SIZE(omap2plus_ports), 852 }; 853 854 static const struct dss_features omap54xx_dss_feats = { 855 .fck_div_max = 64, 856 .dss_fck_multiplier = 1, 857 .parent_clk_name = "dpll_per_x2_ck", 858 .dpi_select_source = &dss_dpi_select_source_omap5, 859 .ports = omap2plus_ports, 860 .num_ports = ARRAY_SIZE(omap2plus_ports), 861 }; 862 863 static const struct dss_features am43xx_dss_feats = { 864 .fck_div_max = 0, 865 .dss_fck_multiplier = 0, 866 .parent_clk_name = NULL, 867 .dpi_select_source = &dss_dpi_select_source_omap2_omap3, 868 .ports = omap2plus_ports, 869 .num_ports = ARRAY_SIZE(omap2plus_ports), 870 }; 871 872 static const struct dss_features dra7xx_dss_feats = { 873 .fck_div_max = 64, 874 .dss_fck_multiplier = 1, 875 .parent_clk_name = "dpll_per_x2_ck", 876 .dpi_select_source = &dss_dpi_select_source_dra7xx, 877 .ports = dra7xx_ports, 878 .num_ports = ARRAY_SIZE(dra7xx_ports), 879 }; 880 881 static const struct dss_features *dss_get_features(void) 882 { 883 switch (omapdss_get_version()) { 884 case OMAPDSS_VER_OMAP24xx: 885 return &omap24xx_dss_feats; 886 887 case OMAPDSS_VER_OMAP34xx_ES1: 888 case OMAPDSS_VER_OMAP34xx_ES3: 889 case OMAPDSS_VER_AM35xx: 890 return &omap34xx_dss_feats; 891 892 case OMAPDSS_VER_OMAP3630: 893 return &omap3630_dss_feats; 894 895 case OMAPDSS_VER_OMAP4430_ES1: 896 case OMAPDSS_VER_OMAP4430_ES2: 897 case OMAPDSS_VER_OMAP4: 898 return &omap44xx_dss_feats; 899 900 case OMAPDSS_VER_OMAP5: 901 return &omap54xx_dss_feats; 902 903 case OMAPDSS_VER_AM43xx: 904 return &am43xx_dss_feats; 905 906 case OMAPDSS_VER_DRA7xx: 907 return &dra7xx_dss_feats; 908 909 default: 910 return NULL; 911 } 912 } 913 914 static void dss_uninit_ports(struct platform_device *pdev); 915 916 static int dss_init_ports(struct platform_device *pdev) 917 { 918 struct device_node *parent = pdev->dev.of_node; 919 struct device_node *port; 920 int r, ret = 0; 921 922 if (parent == NULL) 923 return 0; 924 925 port = omapdss_of_get_next_port(parent, NULL); 926 if (!port) 927 return 0; 928 929 if (dss.feat->num_ports == 0) 930 return 0; 931 932 do { 933 enum omap_display_type port_type; 934 u32 reg; 935 936 r = of_property_read_u32(port, "reg", ®); 937 if (r) 938 reg = 0; 939 940 if (reg >= dss.feat->num_ports) 941 continue; 942 943 port_type = dss.feat->ports[reg]; 944 945 switch (port_type) { 946 case OMAP_DISPLAY_TYPE_DPI: 947 ret = dpi_init_port(pdev, port); 948 break; 949 case OMAP_DISPLAY_TYPE_SDI: 950 ret = sdi_init_port(pdev, port); 951 break; 952 default: 953 break; 954 } 955 } while (!ret && 956 (port = omapdss_of_get_next_port(parent, port)) != NULL); 957 958 if (ret) 959 dss_uninit_ports(pdev); 960 961 return ret; 962 } 963 964 static void dss_uninit_ports(struct platform_device *pdev) 965 { 966 struct device_node *parent = pdev->dev.of_node; 967 struct device_node *port; 968 969 if (parent == NULL) 970 return; 971 972 port = omapdss_of_get_next_port(parent, NULL); 973 if (!port) 974 return; 975 976 if (dss.feat->num_ports == 0) 977 return; 978 979 do { 980 enum omap_display_type port_type; 981 u32 reg; 982 int r; 983 984 r = of_property_read_u32(port, "reg", ®); 985 if (r) 986 reg = 0; 987 988 if (reg >= dss.feat->num_ports) 989 continue; 990 991 port_type = dss.feat->ports[reg]; 992 993 switch (port_type) { 994 case OMAP_DISPLAY_TYPE_DPI: 995 dpi_uninit_port(port); 996 break; 997 case OMAP_DISPLAY_TYPE_SDI: 998 sdi_uninit_port(port); 999 break; 1000 default: 1001 break; 1002 } 1003 } while ((port = omapdss_of_get_next_port(parent, port)) != NULL); 1004 } 1005 1006 static int dss_video_pll_probe(struct platform_device *pdev) 1007 { 1008 struct device_node *np = pdev->dev.of_node; 1009 struct regulator *pll_regulator; 1010 int r; 1011 1012 if (!np) 1013 return 0; 1014 1015 if (of_property_read_bool(np, "syscon-pll-ctrl")) { 1016 dss.syscon_pll_ctrl = syscon_regmap_lookup_by_phandle(np, 1017 "syscon-pll-ctrl"); 1018 if (IS_ERR(dss.syscon_pll_ctrl)) { 1019 dev_err(&pdev->dev, 1020 "failed to get syscon-pll-ctrl regmap\n"); 1021 return PTR_ERR(dss.syscon_pll_ctrl); 1022 } 1023 1024 if (of_property_read_u32_index(np, "syscon-pll-ctrl", 1, 1025 &dss.syscon_pll_ctrl_offset)) { 1026 dev_err(&pdev->dev, 1027 "failed to get syscon-pll-ctrl offset\n"); 1028 return -EINVAL; 1029 } 1030 } 1031 1032 pll_regulator = devm_regulator_get(&pdev->dev, "vdda_video"); 1033 if (IS_ERR(pll_regulator)) { 1034 r = PTR_ERR(pll_regulator); 1035 1036 switch (r) { 1037 case -ENOENT: 1038 pll_regulator = NULL; 1039 break; 1040 1041 case -EPROBE_DEFER: 1042 return -EPROBE_DEFER; 1043 1044 default: 1045 DSSERR("can't get DPLL VDDA regulator\n"); 1046 return r; 1047 } 1048 } 1049 1050 if (of_property_match_string(np, "reg-names", "pll1") >= 0) { 1051 dss.video1_pll = dss_video_pll_init(pdev, 0, pll_regulator); 1052 if (IS_ERR(dss.video1_pll)) 1053 return PTR_ERR(dss.video1_pll); 1054 } 1055 1056 if (of_property_match_string(np, "reg-names", "pll2") >= 0) { 1057 dss.video2_pll = dss_video_pll_init(pdev, 1, pll_regulator); 1058 if (IS_ERR(dss.video2_pll)) { 1059 dss_video_pll_uninit(dss.video1_pll); 1060 return PTR_ERR(dss.video2_pll); 1061 } 1062 } 1063 1064 return 0; 1065 } 1066 1067 /* DSS HW IP initialisation */ 1068 static int dss_bind(struct device *dev) 1069 { 1070 struct platform_device *pdev = to_platform_device(dev); 1071 struct resource *dss_mem; 1072 u32 rev; 1073 int r; 1074 1075 dss.pdev = pdev; 1076 1077 dss.feat = dss_get_features(); 1078 if (!dss.feat) 1079 return -ENODEV; 1080 1081 dss_mem = platform_get_resource(dss.pdev, IORESOURCE_MEM, 0); 1082 if (!dss_mem) { 1083 DSSERR("can't get IORESOURCE_MEM DSS\n"); 1084 return -EINVAL; 1085 } 1086 1087 dss.base = devm_ioremap(&pdev->dev, dss_mem->start, 1088 resource_size(dss_mem)); 1089 if (!dss.base) { 1090 DSSERR("can't ioremap DSS\n"); 1091 return -ENOMEM; 1092 } 1093 1094 r = dss_get_clocks(); 1095 if (r) 1096 return r; 1097 1098 r = dss_setup_default_clock(); 1099 if (r) 1100 goto err_setup_clocks; 1101 1102 r = dss_video_pll_probe(pdev); 1103 if (r) 1104 goto err_pll_init; 1105 1106 r = dss_init_ports(pdev); 1107 if (r) 1108 goto err_init_ports; 1109 1110 pm_runtime_enable(&pdev->dev); 1111 1112 r = dss_runtime_get(); 1113 if (r) 1114 goto err_runtime_get; 1115 1116 dss.dss_clk_rate = clk_get_rate(dss.dss_clk); 1117 1118 /* Select DPLL */ 1119 REG_FLD_MOD(DSS_CONTROL, 0, 0, 0); 1120 1121 dss_select_dispc_clk_source(OMAP_DSS_CLK_SRC_FCK); 1122 1123 #ifdef CONFIG_FB_OMAP2_DSS_VENC 1124 REG_FLD_MOD(DSS_CONTROL, 1, 4, 4); /* venc dac demen */ 1125 REG_FLD_MOD(DSS_CONTROL, 1, 3, 3); /* venc clock 4x enable */ 1126 REG_FLD_MOD(DSS_CONTROL, 0, 2, 2); /* venc clock mode = normal */ 1127 #endif 1128 dss.dsi_clk_source[0] = OMAP_DSS_CLK_SRC_FCK; 1129 dss.dsi_clk_source[1] = OMAP_DSS_CLK_SRC_FCK; 1130 dss.dispc_clk_source = OMAP_DSS_CLK_SRC_FCK; 1131 dss.lcd_clk_source[0] = OMAP_DSS_CLK_SRC_FCK; 1132 dss.lcd_clk_source[1] = OMAP_DSS_CLK_SRC_FCK; 1133 1134 rev = dss_read_reg(DSS_REVISION); 1135 printk(KERN_INFO "OMAP DSS rev %d.%d\n", 1136 FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0)); 1137 1138 dss_runtime_put(); 1139 1140 r = component_bind_all(&pdev->dev, NULL); 1141 if (r) 1142 goto err_component; 1143 1144 dss_debugfs_create_file("dss", dss_dump_regs); 1145 1146 pm_set_vt_switch(0); 1147 1148 dss_initialized = true; 1149 1150 return 0; 1151 1152 err_component: 1153 err_runtime_get: 1154 pm_runtime_disable(&pdev->dev); 1155 dss_uninit_ports(pdev); 1156 err_init_ports: 1157 if (dss.video1_pll) 1158 dss_video_pll_uninit(dss.video1_pll); 1159 1160 if (dss.video2_pll) 1161 dss_video_pll_uninit(dss.video2_pll); 1162 err_pll_init: 1163 err_setup_clocks: 1164 dss_put_clocks(); 1165 return r; 1166 } 1167 1168 static void dss_unbind(struct device *dev) 1169 { 1170 struct platform_device *pdev = to_platform_device(dev); 1171 1172 dss_initialized = false; 1173 1174 component_unbind_all(&pdev->dev, NULL); 1175 1176 if (dss.video1_pll) 1177 dss_video_pll_uninit(dss.video1_pll); 1178 1179 if (dss.video2_pll) 1180 dss_video_pll_uninit(dss.video2_pll); 1181 1182 dss_uninit_ports(pdev); 1183 1184 pm_runtime_disable(&pdev->dev); 1185 1186 dss_put_clocks(); 1187 } 1188 1189 static const struct component_master_ops dss_component_ops = { 1190 .bind = dss_bind, 1191 .unbind = dss_unbind, 1192 }; 1193 1194 static int dss_add_child_component(struct device *dev, void *data) 1195 { 1196 struct component_match **match = data; 1197 1198 /* 1199 * HACK 1200 * We don't have a working driver for rfbi, so skip it here always. 1201 * Otherwise dss will never get probed successfully, as it will wait 1202 * for rfbi to get probed. 1203 */ 1204 if (strstr(dev_name(dev), "rfbi")) 1205 return 0; 1206 1207 component_match_add(dev->parent, match, component_compare_dev, dev); 1208 1209 return 0; 1210 } 1211 1212 static int dss_probe(struct platform_device *pdev) 1213 { 1214 struct component_match *match = NULL; 1215 int r; 1216 1217 /* add all the child devices as components */ 1218 device_for_each_child(&pdev->dev, &match, dss_add_child_component); 1219 1220 r = component_master_add_with_match(&pdev->dev, &dss_component_ops, match); 1221 if (r) 1222 return r; 1223 1224 return 0; 1225 } 1226 1227 static int dss_remove(struct platform_device *pdev) 1228 { 1229 component_master_del(&pdev->dev, &dss_component_ops); 1230 return 0; 1231 } 1232 1233 static int dss_runtime_suspend(struct device *dev) 1234 { 1235 dss_save_context(); 1236 dss_set_min_bus_tput(dev, 0); 1237 1238 pinctrl_pm_select_sleep_state(dev); 1239 1240 return 0; 1241 } 1242 1243 static int dss_runtime_resume(struct device *dev) 1244 { 1245 int r; 1246 1247 pinctrl_pm_select_default_state(dev); 1248 1249 /* 1250 * Set an arbitrarily high tput request to ensure OPP100. 1251 * What we should really do is to make a request to stay in OPP100, 1252 * without any tput requirements, but that is not currently possible 1253 * via the PM layer. 1254 */ 1255 1256 r = dss_set_min_bus_tput(dev, 1000000000); 1257 if (r) 1258 return r; 1259 1260 dss_restore_context(); 1261 return 0; 1262 } 1263 1264 static const struct dev_pm_ops dss_pm_ops = { 1265 .runtime_suspend = dss_runtime_suspend, 1266 .runtime_resume = dss_runtime_resume, 1267 }; 1268 1269 static const struct of_device_id dss_of_match[] = { 1270 { .compatible = "ti,omap2-dss", }, 1271 { .compatible = "ti,omap3-dss", }, 1272 { .compatible = "ti,omap4-dss", }, 1273 { .compatible = "ti,omap5-dss", }, 1274 { .compatible = "ti,dra7-dss", }, 1275 {}, 1276 }; 1277 1278 MODULE_DEVICE_TABLE(of, dss_of_match); 1279 1280 static struct platform_driver omap_dsshw_driver = { 1281 .probe = dss_probe, 1282 .remove = dss_remove, 1283 .driver = { 1284 .name = "omapdss_dss", 1285 .pm = &dss_pm_ops, 1286 .of_match_table = dss_of_match, 1287 .suppress_bind_attrs = true, 1288 }, 1289 }; 1290 1291 int __init dss_init_platform_driver(void) 1292 { 1293 return platform_driver_register(&omap_dsshw_driver); 1294 } 1295 1296 void dss_uninit_platform_driver(void) 1297 { 1298 platform_driver_unregister(&omap_dsshw_driver); 1299 } 1300