1 /* 2 * linux/drivers/video/omap2/dss/dss.c 3 * 4 * Copyright (C) 2009 Nokia Corporation 5 * Author: Tomi Valkeinen <tomi.valkeinen@nokia.com> 6 * 7 * Some code and ideas taken from drivers/video/omap/ driver 8 * by Imre Deak. 9 * 10 * This program is free software; you can redistribute it and/or modify it 11 * under the terms of the GNU General Public License version 2 as published by 12 * the Free Software Foundation. 13 * 14 * This program is distributed in the hope that it will be useful, but WITHOUT 15 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 16 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 17 * more details. 18 * 19 * You should have received a copy of the GNU General Public License along with 20 * this program. If not, see <http://www.gnu.org/licenses/>. 21 */ 22 23 #define DSS_SUBSYS_NAME "DSS" 24 25 #include <linux/kernel.h> 26 #include <linux/module.h> 27 #include <linux/io.h> 28 #include <linux/export.h> 29 #include <linux/err.h> 30 #include <linux/delay.h> 31 #include <linux/seq_file.h> 32 #include <linux/clk.h> 33 #include <linux/platform_device.h> 34 #include <linux/pm_runtime.h> 35 #include <linux/gfp.h> 36 #include <linux/sizes.h> 37 #include <linux/mfd/syscon.h> 38 #include <linux/regmap.h> 39 #include <linux/of.h> 40 #include <linux/regulator/consumer.h> 41 #include <linux/suspend.h> 42 #include <linux/component.h> 43 #include <linux/pinctrl/consumer.h> 44 45 #include <video/omapfb_dss.h> 46 47 #include "dss.h" 48 #include "dss_features.h" 49 50 #define DSS_SZ_REGS SZ_512 51 52 struct dss_reg { 53 u16 idx; 54 }; 55 56 #define DSS_REG(idx) ((const struct dss_reg) { idx }) 57 58 #define DSS_REVISION DSS_REG(0x0000) 59 #define DSS_SYSCONFIG DSS_REG(0x0010) 60 #define DSS_SYSSTATUS DSS_REG(0x0014) 61 #define DSS_CONTROL DSS_REG(0x0040) 62 #define DSS_SDI_CONTROL DSS_REG(0x0044) 63 #define DSS_PLL_CONTROL DSS_REG(0x0048) 64 #define DSS_SDI_STATUS DSS_REG(0x005C) 65 66 #define REG_GET(idx, start, end) \ 67 FLD_GET(dss_read_reg(idx), start, end) 68 69 #define REG_FLD_MOD(idx, val, start, end) \ 70 dss_write_reg(idx, FLD_MOD(dss_read_reg(idx), val, start, end)) 71 72 struct dss_features { 73 u8 fck_div_max; 74 u8 dss_fck_multiplier; 75 const char *parent_clk_name; 76 const enum omap_display_type *ports; 77 int num_ports; 78 int (*dpi_select_source)(int port, enum omap_channel channel); 79 }; 80 81 static struct { 82 struct platform_device *pdev; 83 void __iomem *base; 84 struct regmap *syscon_pll_ctrl; 85 u32 syscon_pll_ctrl_offset; 86 87 struct clk *parent_clk; 88 struct clk *dss_clk; 89 unsigned long dss_clk_rate; 90 91 unsigned long cache_req_pck; 92 unsigned long cache_prate; 93 struct dispc_clock_info cache_dispc_cinfo; 94 95 enum omap_dss_clk_source dsi_clk_source[MAX_NUM_DSI]; 96 enum omap_dss_clk_source dispc_clk_source; 97 enum omap_dss_clk_source lcd_clk_source[MAX_DSS_LCD_MANAGERS]; 98 99 bool ctx_valid; 100 u32 ctx[DSS_SZ_REGS / sizeof(u32)]; 101 102 const struct dss_features *feat; 103 104 struct dss_pll *video1_pll; 105 struct dss_pll *video2_pll; 106 } dss; 107 108 static const char * const dss_generic_clk_source_names[] = { 109 [OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC] = "DSI_PLL_HSDIV_DISPC", 110 [OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DSI] = "DSI_PLL_HSDIV_DSI", 111 [OMAP_DSS_CLK_SRC_FCK] = "DSS_FCK", 112 [OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DISPC] = "DSI_PLL2_HSDIV_DISPC", 113 [OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DSI] = "DSI_PLL2_HSDIV_DSI", 114 }; 115 116 static bool dss_initialized; 117 118 bool omapdss_is_initialized(void) 119 { 120 return dss_initialized; 121 } 122 EXPORT_SYMBOL(omapdss_is_initialized); 123 124 static inline void dss_write_reg(const struct dss_reg idx, u32 val) 125 { 126 __raw_writel(val, dss.base + idx.idx); 127 } 128 129 static inline u32 dss_read_reg(const struct dss_reg idx) 130 { 131 return __raw_readl(dss.base + idx.idx); 132 } 133 134 #define SR(reg) \ 135 dss.ctx[(DSS_##reg).idx / sizeof(u32)] = dss_read_reg(DSS_##reg) 136 #define RR(reg) \ 137 dss_write_reg(DSS_##reg, dss.ctx[(DSS_##reg).idx / sizeof(u32)]) 138 139 static void dss_save_context(void) 140 { 141 DSSDBG("dss_save_context\n"); 142 143 SR(CONTROL); 144 145 if (dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_LCD) & 146 OMAP_DISPLAY_TYPE_SDI) { 147 SR(SDI_CONTROL); 148 SR(PLL_CONTROL); 149 } 150 151 dss.ctx_valid = true; 152 153 DSSDBG("context saved\n"); 154 } 155 156 static void dss_restore_context(void) 157 { 158 DSSDBG("dss_restore_context\n"); 159 160 if (!dss.ctx_valid) 161 return; 162 163 RR(CONTROL); 164 165 if (dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_LCD) & 166 OMAP_DISPLAY_TYPE_SDI) { 167 RR(SDI_CONTROL); 168 RR(PLL_CONTROL); 169 } 170 171 DSSDBG("context restored\n"); 172 } 173 174 #undef SR 175 #undef RR 176 177 void dss_ctrl_pll_enable(enum dss_pll_id pll_id, bool enable) 178 { 179 unsigned shift; 180 unsigned val; 181 182 if (!dss.syscon_pll_ctrl) 183 return; 184 185 val = !enable; 186 187 switch (pll_id) { 188 case DSS_PLL_VIDEO1: 189 shift = 0; 190 break; 191 case DSS_PLL_VIDEO2: 192 shift = 1; 193 break; 194 case DSS_PLL_HDMI: 195 shift = 2; 196 break; 197 default: 198 DSSERR("illegal DSS PLL ID %d\n", pll_id); 199 return; 200 } 201 202 regmap_update_bits(dss.syscon_pll_ctrl, dss.syscon_pll_ctrl_offset, 203 1 << shift, val << shift); 204 } 205 206 void dss_ctrl_pll_set_control_mux(enum dss_pll_id pll_id, 207 enum omap_channel channel) 208 { 209 unsigned shift, val; 210 211 if (!dss.syscon_pll_ctrl) 212 return; 213 214 switch (channel) { 215 case OMAP_DSS_CHANNEL_LCD: 216 shift = 3; 217 218 switch (pll_id) { 219 case DSS_PLL_VIDEO1: 220 val = 0; break; 221 case DSS_PLL_HDMI: 222 val = 1; break; 223 default: 224 DSSERR("error in PLL mux config for LCD\n"); 225 return; 226 } 227 228 break; 229 case OMAP_DSS_CHANNEL_LCD2: 230 shift = 5; 231 232 switch (pll_id) { 233 case DSS_PLL_VIDEO1: 234 val = 0; break; 235 case DSS_PLL_VIDEO2: 236 val = 1; break; 237 case DSS_PLL_HDMI: 238 val = 2; break; 239 default: 240 DSSERR("error in PLL mux config for LCD2\n"); 241 return; 242 } 243 244 break; 245 case OMAP_DSS_CHANNEL_LCD3: 246 shift = 7; 247 248 switch (pll_id) { 249 case DSS_PLL_VIDEO1: 250 val = 1; break; 251 case DSS_PLL_VIDEO2: 252 val = 0; break; 253 case DSS_PLL_HDMI: 254 val = 2; break; 255 default: 256 DSSERR("error in PLL mux config for LCD3\n"); 257 return; 258 } 259 260 break; 261 default: 262 DSSERR("error in PLL mux config\n"); 263 return; 264 } 265 266 regmap_update_bits(dss.syscon_pll_ctrl, dss.syscon_pll_ctrl_offset, 267 0x3 << shift, val << shift); 268 } 269 270 void dss_sdi_init(int datapairs) 271 { 272 u32 l; 273 274 BUG_ON(datapairs > 3 || datapairs < 1); 275 276 l = dss_read_reg(DSS_SDI_CONTROL); 277 l = FLD_MOD(l, 0xf, 19, 15); /* SDI_PDIV */ 278 l = FLD_MOD(l, datapairs-1, 3, 2); /* SDI_PRSEL */ 279 l = FLD_MOD(l, 2, 1, 0); /* SDI_BWSEL */ 280 dss_write_reg(DSS_SDI_CONTROL, l); 281 282 l = dss_read_reg(DSS_PLL_CONTROL); 283 l = FLD_MOD(l, 0x7, 25, 22); /* SDI_PLL_FREQSEL */ 284 l = FLD_MOD(l, 0xb, 16, 11); /* SDI_PLL_REGN */ 285 l = FLD_MOD(l, 0xb4, 10, 1); /* SDI_PLL_REGM */ 286 dss_write_reg(DSS_PLL_CONTROL, l); 287 } 288 289 int dss_sdi_enable(void) 290 { 291 unsigned long timeout; 292 293 dispc_pck_free_enable(1); 294 295 /* Reset SDI PLL */ 296 REG_FLD_MOD(DSS_PLL_CONTROL, 1, 18, 18); /* SDI_PLL_SYSRESET */ 297 udelay(1); /* wait 2x PCLK */ 298 299 /* Lock SDI PLL */ 300 REG_FLD_MOD(DSS_PLL_CONTROL, 1, 28, 28); /* SDI_PLL_GOBIT */ 301 302 /* Waiting for PLL lock request to complete */ 303 timeout = jiffies + msecs_to_jiffies(500); 304 while (dss_read_reg(DSS_SDI_STATUS) & (1 << 6)) { 305 if (time_after_eq(jiffies, timeout)) { 306 DSSERR("PLL lock request timed out\n"); 307 goto err1; 308 } 309 } 310 311 /* Clearing PLL_GO bit */ 312 REG_FLD_MOD(DSS_PLL_CONTROL, 0, 28, 28); 313 314 /* Waiting for PLL to lock */ 315 timeout = jiffies + msecs_to_jiffies(500); 316 while (!(dss_read_reg(DSS_SDI_STATUS) & (1 << 5))) { 317 if (time_after_eq(jiffies, timeout)) { 318 DSSERR("PLL lock timed out\n"); 319 goto err1; 320 } 321 } 322 323 dispc_lcd_enable_signal(1); 324 325 /* Waiting for SDI reset to complete */ 326 timeout = jiffies + msecs_to_jiffies(500); 327 while (!(dss_read_reg(DSS_SDI_STATUS) & (1 << 2))) { 328 if (time_after_eq(jiffies, timeout)) { 329 DSSERR("SDI reset timed out\n"); 330 goto err2; 331 } 332 } 333 334 return 0; 335 336 err2: 337 dispc_lcd_enable_signal(0); 338 err1: 339 /* Reset SDI PLL */ 340 REG_FLD_MOD(DSS_PLL_CONTROL, 0, 18, 18); /* SDI_PLL_SYSRESET */ 341 342 dispc_pck_free_enable(0); 343 344 return -ETIMEDOUT; 345 } 346 347 void dss_sdi_disable(void) 348 { 349 dispc_lcd_enable_signal(0); 350 351 dispc_pck_free_enable(0); 352 353 /* Reset SDI PLL */ 354 REG_FLD_MOD(DSS_PLL_CONTROL, 0, 18, 18); /* SDI_PLL_SYSRESET */ 355 } 356 357 const char *dss_get_generic_clk_source_name(enum omap_dss_clk_source clk_src) 358 { 359 return dss_generic_clk_source_names[clk_src]; 360 } 361 362 void dss_dump_clocks(struct seq_file *s) 363 { 364 const char *fclk_name, *fclk_real_name; 365 unsigned long fclk_rate; 366 367 if (dss_runtime_get()) 368 return; 369 370 seq_printf(s, "- DSS -\n"); 371 372 fclk_name = dss_get_generic_clk_source_name(OMAP_DSS_CLK_SRC_FCK); 373 fclk_real_name = dss_feat_get_clk_source_name(OMAP_DSS_CLK_SRC_FCK); 374 fclk_rate = clk_get_rate(dss.dss_clk); 375 376 seq_printf(s, "%s (%s) = %lu\n", 377 fclk_name, fclk_real_name, 378 fclk_rate); 379 380 dss_runtime_put(); 381 } 382 383 static void dss_dump_regs(struct seq_file *s) 384 { 385 #define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, dss_read_reg(r)) 386 387 if (dss_runtime_get()) 388 return; 389 390 DUMPREG(DSS_REVISION); 391 DUMPREG(DSS_SYSCONFIG); 392 DUMPREG(DSS_SYSSTATUS); 393 DUMPREG(DSS_CONTROL); 394 395 if (dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_LCD) & 396 OMAP_DISPLAY_TYPE_SDI) { 397 DUMPREG(DSS_SDI_CONTROL); 398 DUMPREG(DSS_PLL_CONTROL); 399 DUMPREG(DSS_SDI_STATUS); 400 } 401 402 dss_runtime_put(); 403 #undef DUMPREG 404 } 405 406 static void dss_select_dispc_clk_source(enum omap_dss_clk_source clk_src) 407 { 408 int b; 409 u8 start, end; 410 411 switch (clk_src) { 412 case OMAP_DSS_CLK_SRC_FCK: 413 b = 0; 414 break; 415 case OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC: 416 b = 1; 417 break; 418 case OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DISPC: 419 b = 2; 420 break; 421 default: 422 BUG(); 423 return; 424 } 425 426 dss_feat_get_reg_field(FEAT_REG_DISPC_CLK_SWITCH, &start, &end); 427 428 REG_FLD_MOD(DSS_CONTROL, b, start, end); /* DISPC_CLK_SWITCH */ 429 430 dss.dispc_clk_source = clk_src; 431 } 432 433 void dss_select_dsi_clk_source(int dsi_module, 434 enum omap_dss_clk_source clk_src) 435 { 436 int b, pos; 437 438 switch (clk_src) { 439 case OMAP_DSS_CLK_SRC_FCK: 440 b = 0; 441 break; 442 case OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DSI: 443 BUG_ON(dsi_module != 0); 444 b = 1; 445 break; 446 case OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DSI: 447 BUG_ON(dsi_module != 1); 448 b = 1; 449 break; 450 default: 451 BUG(); 452 return; 453 } 454 455 pos = dsi_module == 0 ? 1 : 10; 456 REG_FLD_MOD(DSS_CONTROL, b, pos, pos); /* DSIx_CLK_SWITCH */ 457 458 dss.dsi_clk_source[dsi_module] = clk_src; 459 } 460 461 void dss_select_lcd_clk_source(enum omap_channel channel, 462 enum omap_dss_clk_source clk_src) 463 { 464 int b, ix, pos; 465 466 if (!dss_has_feature(FEAT_LCD_CLK_SRC)) { 467 dss_select_dispc_clk_source(clk_src); 468 return; 469 } 470 471 switch (clk_src) { 472 case OMAP_DSS_CLK_SRC_FCK: 473 b = 0; 474 break; 475 case OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC: 476 BUG_ON(channel != OMAP_DSS_CHANNEL_LCD); 477 b = 1; 478 break; 479 case OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DISPC: 480 BUG_ON(channel != OMAP_DSS_CHANNEL_LCD2 && 481 channel != OMAP_DSS_CHANNEL_LCD3); 482 b = 1; 483 break; 484 default: 485 BUG(); 486 return; 487 } 488 489 pos = channel == OMAP_DSS_CHANNEL_LCD ? 0 : 490 (channel == OMAP_DSS_CHANNEL_LCD2 ? 12 : 19); 491 REG_FLD_MOD(DSS_CONTROL, b, pos, pos); /* LCDx_CLK_SWITCH */ 492 493 ix = channel == OMAP_DSS_CHANNEL_LCD ? 0 : 494 (channel == OMAP_DSS_CHANNEL_LCD2 ? 1 : 2); 495 dss.lcd_clk_source[ix] = clk_src; 496 } 497 498 enum omap_dss_clk_source dss_get_dispc_clk_source(void) 499 { 500 return dss.dispc_clk_source; 501 } 502 503 enum omap_dss_clk_source dss_get_dsi_clk_source(int dsi_module) 504 { 505 return dss.dsi_clk_source[dsi_module]; 506 } 507 508 enum omap_dss_clk_source dss_get_lcd_clk_source(enum omap_channel channel) 509 { 510 if (dss_has_feature(FEAT_LCD_CLK_SRC)) { 511 int ix = channel == OMAP_DSS_CHANNEL_LCD ? 0 : 512 (channel == OMAP_DSS_CHANNEL_LCD2 ? 1 : 2); 513 return dss.lcd_clk_source[ix]; 514 } else { 515 /* LCD_CLK source is the same as DISPC_FCLK source for 516 * OMAP2 and OMAP3 */ 517 return dss.dispc_clk_source; 518 } 519 } 520 521 bool dss_div_calc(unsigned long pck, unsigned long fck_min, 522 dss_div_calc_func func, void *data) 523 { 524 int fckd, fckd_start, fckd_stop; 525 unsigned long fck; 526 unsigned long fck_hw_max; 527 unsigned long fckd_hw_max; 528 unsigned long prate; 529 unsigned m; 530 531 fck_hw_max = dss_feat_get_param_max(FEAT_PARAM_DSS_FCK); 532 533 if (dss.parent_clk == NULL) { 534 unsigned pckd; 535 536 pckd = fck_hw_max / pck; 537 538 fck = pck * pckd; 539 540 fck = clk_round_rate(dss.dss_clk, fck); 541 542 return func(fck, data); 543 } 544 545 fckd_hw_max = dss.feat->fck_div_max; 546 547 m = dss.feat->dss_fck_multiplier; 548 prate = clk_get_rate(dss.parent_clk); 549 550 fck_min = fck_min ? fck_min : 1; 551 552 fckd_start = min(prate * m / fck_min, fckd_hw_max); 553 fckd_stop = max(DIV_ROUND_UP(prate * m, fck_hw_max), 1ul); 554 555 for (fckd = fckd_start; fckd >= fckd_stop; --fckd) { 556 fck = DIV_ROUND_UP(prate, fckd) * m; 557 558 if (func(fck, data)) 559 return true; 560 } 561 562 return false; 563 } 564 565 int dss_set_fck_rate(unsigned long rate) 566 { 567 int r; 568 569 DSSDBG("set fck to %lu\n", rate); 570 571 r = clk_set_rate(dss.dss_clk, rate); 572 if (r) 573 return r; 574 575 dss.dss_clk_rate = clk_get_rate(dss.dss_clk); 576 577 WARN_ONCE(dss.dss_clk_rate != rate, 578 "clk rate mismatch: %lu != %lu", dss.dss_clk_rate, 579 rate); 580 581 return 0; 582 } 583 584 unsigned long dss_get_dispc_clk_rate(void) 585 { 586 return dss.dss_clk_rate; 587 } 588 589 static int dss_setup_default_clock(void) 590 { 591 unsigned long max_dss_fck, prate; 592 unsigned long fck; 593 unsigned fck_div; 594 int r; 595 596 max_dss_fck = dss_feat_get_param_max(FEAT_PARAM_DSS_FCK); 597 598 if (dss.parent_clk == NULL) { 599 fck = clk_round_rate(dss.dss_clk, max_dss_fck); 600 } else { 601 prate = clk_get_rate(dss.parent_clk); 602 603 fck_div = DIV_ROUND_UP(prate * dss.feat->dss_fck_multiplier, 604 max_dss_fck); 605 fck = DIV_ROUND_UP(prate, fck_div) * dss.feat->dss_fck_multiplier; 606 } 607 608 r = dss_set_fck_rate(fck); 609 if (r) 610 return r; 611 612 return 0; 613 } 614 615 void dss_set_venc_output(enum omap_dss_venc_type type) 616 { 617 int l = 0; 618 619 if (type == OMAP_DSS_VENC_TYPE_COMPOSITE) 620 l = 0; 621 else if (type == OMAP_DSS_VENC_TYPE_SVIDEO) 622 l = 1; 623 else 624 BUG(); 625 626 /* venc out selection. 0 = comp, 1 = svideo */ 627 REG_FLD_MOD(DSS_CONTROL, l, 6, 6); 628 } 629 630 void dss_set_dac_pwrdn_bgz(bool enable) 631 { 632 REG_FLD_MOD(DSS_CONTROL, enable, 5, 5); /* DAC Power-Down Control */ 633 } 634 635 void dss_select_hdmi_venc_clk_source(enum dss_hdmi_venc_clk_source_select src) 636 { 637 enum omap_display_type dp; 638 dp = dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_DIGIT); 639 640 /* Complain about invalid selections */ 641 WARN_ON((src == DSS_VENC_TV_CLK) && !(dp & OMAP_DISPLAY_TYPE_VENC)); 642 WARN_ON((src == DSS_HDMI_M_PCLK) && !(dp & OMAP_DISPLAY_TYPE_HDMI)); 643 644 /* Select only if we have options */ 645 if ((dp & OMAP_DISPLAY_TYPE_VENC) && (dp & OMAP_DISPLAY_TYPE_HDMI)) 646 REG_FLD_MOD(DSS_CONTROL, src, 15, 15); /* VENC_HDMI_SWITCH */ 647 } 648 649 enum dss_hdmi_venc_clk_source_select dss_get_hdmi_venc_clk_source(void) 650 { 651 enum omap_display_type displays; 652 653 displays = dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_DIGIT); 654 if ((displays & OMAP_DISPLAY_TYPE_HDMI) == 0) 655 return DSS_VENC_TV_CLK; 656 657 if ((displays & OMAP_DISPLAY_TYPE_VENC) == 0) 658 return DSS_HDMI_M_PCLK; 659 660 return REG_GET(DSS_CONTROL, 15, 15); 661 } 662 663 static int dss_dpi_select_source_omap2_omap3(int port, enum omap_channel channel) 664 { 665 if (channel != OMAP_DSS_CHANNEL_LCD) 666 return -EINVAL; 667 668 return 0; 669 } 670 671 static int dss_dpi_select_source_omap4(int port, enum omap_channel channel) 672 { 673 int val; 674 675 switch (channel) { 676 case OMAP_DSS_CHANNEL_LCD2: 677 val = 0; 678 break; 679 case OMAP_DSS_CHANNEL_DIGIT: 680 val = 1; 681 break; 682 default: 683 return -EINVAL; 684 } 685 686 REG_FLD_MOD(DSS_CONTROL, val, 17, 17); 687 688 return 0; 689 } 690 691 static int dss_dpi_select_source_omap5(int port, enum omap_channel channel) 692 { 693 int val; 694 695 switch (channel) { 696 case OMAP_DSS_CHANNEL_LCD: 697 val = 1; 698 break; 699 case OMAP_DSS_CHANNEL_LCD2: 700 val = 2; 701 break; 702 case OMAP_DSS_CHANNEL_LCD3: 703 val = 3; 704 break; 705 case OMAP_DSS_CHANNEL_DIGIT: 706 val = 0; 707 break; 708 default: 709 return -EINVAL; 710 } 711 712 REG_FLD_MOD(DSS_CONTROL, val, 17, 16); 713 714 return 0; 715 } 716 717 static int dss_dpi_select_source_dra7xx(int port, enum omap_channel channel) 718 { 719 switch (port) { 720 case 0: 721 return dss_dpi_select_source_omap5(port, channel); 722 case 1: 723 if (channel != OMAP_DSS_CHANNEL_LCD2) 724 return -EINVAL; 725 break; 726 case 2: 727 if (channel != OMAP_DSS_CHANNEL_LCD3) 728 return -EINVAL; 729 break; 730 default: 731 return -EINVAL; 732 } 733 734 return 0; 735 } 736 737 int dss_dpi_select_source(int port, enum omap_channel channel) 738 { 739 return dss.feat->dpi_select_source(port, channel); 740 } 741 742 static int dss_get_clocks(void) 743 { 744 struct clk *clk; 745 746 clk = devm_clk_get(&dss.pdev->dev, "fck"); 747 if (IS_ERR(clk)) { 748 DSSERR("can't get clock fck\n"); 749 return PTR_ERR(clk); 750 } 751 752 dss.dss_clk = clk; 753 754 if (dss.feat->parent_clk_name) { 755 clk = clk_get(NULL, dss.feat->parent_clk_name); 756 if (IS_ERR(clk)) { 757 DSSERR("Failed to get %s\n", dss.feat->parent_clk_name); 758 return PTR_ERR(clk); 759 } 760 } else { 761 clk = NULL; 762 } 763 764 dss.parent_clk = clk; 765 766 return 0; 767 } 768 769 static void dss_put_clocks(void) 770 { 771 if (dss.parent_clk) 772 clk_put(dss.parent_clk); 773 } 774 775 int dss_runtime_get(void) 776 { 777 int r; 778 779 DSSDBG("dss_runtime_get\n"); 780 781 r = pm_runtime_get_sync(&dss.pdev->dev); 782 WARN_ON(r < 0); 783 return r < 0 ? r : 0; 784 } 785 786 void dss_runtime_put(void) 787 { 788 int r; 789 790 DSSDBG("dss_runtime_put\n"); 791 792 r = pm_runtime_put_sync(&dss.pdev->dev); 793 WARN_ON(r < 0 && r != -ENOSYS && r != -EBUSY); 794 } 795 796 /* DEBUGFS */ 797 #if defined(CONFIG_FB_OMAP2_DSS_DEBUGFS) 798 void dss_debug_dump_clocks(struct seq_file *s) 799 { 800 dss_dump_clocks(s); 801 dispc_dump_clocks(s); 802 #ifdef CONFIG_FB_OMAP2_DSS_DSI 803 dsi_dump_clocks(s); 804 #endif 805 } 806 #endif 807 808 809 static const enum omap_display_type omap2plus_ports[] = { 810 OMAP_DISPLAY_TYPE_DPI, 811 }; 812 813 static const enum omap_display_type omap34xx_ports[] = { 814 OMAP_DISPLAY_TYPE_DPI, 815 OMAP_DISPLAY_TYPE_SDI, 816 }; 817 818 static const enum omap_display_type dra7xx_ports[] = { 819 OMAP_DISPLAY_TYPE_DPI, 820 OMAP_DISPLAY_TYPE_DPI, 821 OMAP_DISPLAY_TYPE_DPI, 822 }; 823 824 static const struct dss_features omap24xx_dss_feats = { 825 /* 826 * fck div max is really 16, but the divider range has gaps. The range 827 * from 1 to 6 has no gaps, so let's use that as a max. 828 */ 829 .fck_div_max = 6, 830 .dss_fck_multiplier = 2, 831 .parent_clk_name = "core_ck", 832 .dpi_select_source = &dss_dpi_select_source_omap2_omap3, 833 .ports = omap2plus_ports, 834 .num_ports = ARRAY_SIZE(omap2plus_ports), 835 }; 836 837 static const struct dss_features omap34xx_dss_feats = { 838 .fck_div_max = 16, 839 .dss_fck_multiplier = 2, 840 .parent_clk_name = "dpll4_ck", 841 .dpi_select_source = &dss_dpi_select_source_omap2_omap3, 842 .ports = omap34xx_ports, 843 .num_ports = ARRAY_SIZE(omap34xx_ports), 844 }; 845 846 static const struct dss_features omap3630_dss_feats = { 847 .fck_div_max = 32, 848 .dss_fck_multiplier = 1, 849 .parent_clk_name = "dpll4_ck", 850 .dpi_select_source = &dss_dpi_select_source_omap2_omap3, 851 .ports = omap2plus_ports, 852 .num_ports = ARRAY_SIZE(omap2plus_ports), 853 }; 854 855 static const struct dss_features omap44xx_dss_feats = { 856 .fck_div_max = 32, 857 .dss_fck_multiplier = 1, 858 .parent_clk_name = "dpll_per_x2_ck", 859 .dpi_select_source = &dss_dpi_select_source_omap4, 860 .ports = omap2plus_ports, 861 .num_ports = ARRAY_SIZE(omap2plus_ports), 862 }; 863 864 static const struct dss_features omap54xx_dss_feats = { 865 .fck_div_max = 64, 866 .dss_fck_multiplier = 1, 867 .parent_clk_name = "dpll_per_x2_ck", 868 .dpi_select_source = &dss_dpi_select_source_omap5, 869 .ports = omap2plus_ports, 870 .num_ports = ARRAY_SIZE(omap2plus_ports), 871 }; 872 873 static const struct dss_features am43xx_dss_feats = { 874 .fck_div_max = 0, 875 .dss_fck_multiplier = 0, 876 .parent_clk_name = NULL, 877 .dpi_select_source = &dss_dpi_select_source_omap2_omap3, 878 .ports = omap2plus_ports, 879 .num_ports = ARRAY_SIZE(omap2plus_ports), 880 }; 881 882 static const struct dss_features dra7xx_dss_feats = { 883 .fck_div_max = 64, 884 .dss_fck_multiplier = 1, 885 .parent_clk_name = "dpll_per_x2_ck", 886 .dpi_select_source = &dss_dpi_select_source_dra7xx, 887 .ports = dra7xx_ports, 888 .num_ports = ARRAY_SIZE(dra7xx_ports), 889 }; 890 891 static const struct dss_features *dss_get_features(void) 892 { 893 switch (omapdss_get_version()) { 894 case OMAPDSS_VER_OMAP24xx: 895 return &omap24xx_dss_feats; 896 897 case OMAPDSS_VER_OMAP34xx_ES1: 898 case OMAPDSS_VER_OMAP34xx_ES3: 899 case OMAPDSS_VER_AM35xx: 900 return &omap34xx_dss_feats; 901 902 case OMAPDSS_VER_OMAP3630: 903 return &omap3630_dss_feats; 904 905 case OMAPDSS_VER_OMAP4430_ES1: 906 case OMAPDSS_VER_OMAP4430_ES2: 907 case OMAPDSS_VER_OMAP4: 908 return &omap44xx_dss_feats; 909 910 case OMAPDSS_VER_OMAP5: 911 return &omap54xx_dss_feats; 912 913 case OMAPDSS_VER_AM43xx: 914 return &am43xx_dss_feats; 915 916 case OMAPDSS_VER_DRA7xx: 917 return &dra7xx_dss_feats; 918 919 default: 920 return NULL; 921 } 922 } 923 924 static void dss_uninit_ports(struct platform_device *pdev); 925 926 static int dss_init_ports(struct platform_device *pdev) 927 { 928 struct device_node *parent = pdev->dev.of_node; 929 struct device_node *port; 930 int r, ret = 0; 931 932 if (parent == NULL) 933 return 0; 934 935 port = omapdss_of_get_next_port(parent, NULL); 936 if (!port) 937 return 0; 938 939 if (dss.feat->num_ports == 0) 940 return 0; 941 942 do { 943 enum omap_display_type port_type; 944 u32 reg; 945 946 r = of_property_read_u32(port, "reg", ®); 947 if (r) 948 reg = 0; 949 950 if (reg >= dss.feat->num_ports) 951 continue; 952 953 port_type = dss.feat->ports[reg]; 954 955 switch (port_type) { 956 case OMAP_DISPLAY_TYPE_DPI: 957 ret = dpi_init_port(pdev, port); 958 break; 959 case OMAP_DISPLAY_TYPE_SDI: 960 ret = sdi_init_port(pdev, port); 961 break; 962 default: 963 break; 964 } 965 } while (!ret && 966 (port = omapdss_of_get_next_port(parent, port)) != NULL); 967 968 if (ret) 969 dss_uninit_ports(pdev); 970 971 return ret; 972 } 973 974 static void dss_uninit_ports(struct platform_device *pdev) 975 { 976 struct device_node *parent = pdev->dev.of_node; 977 struct device_node *port; 978 979 if (parent == NULL) 980 return; 981 982 port = omapdss_of_get_next_port(parent, NULL); 983 if (!port) 984 return; 985 986 if (dss.feat->num_ports == 0) 987 return; 988 989 do { 990 enum omap_display_type port_type; 991 u32 reg; 992 int r; 993 994 r = of_property_read_u32(port, "reg", ®); 995 if (r) 996 reg = 0; 997 998 if (reg >= dss.feat->num_ports) 999 continue; 1000 1001 port_type = dss.feat->ports[reg]; 1002 1003 switch (port_type) { 1004 case OMAP_DISPLAY_TYPE_DPI: 1005 dpi_uninit_port(port); 1006 break; 1007 case OMAP_DISPLAY_TYPE_SDI: 1008 sdi_uninit_port(port); 1009 break; 1010 default: 1011 break; 1012 } 1013 } while ((port = omapdss_of_get_next_port(parent, port)) != NULL); 1014 } 1015 1016 static int dss_video_pll_probe(struct platform_device *pdev) 1017 { 1018 struct device_node *np = pdev->dev.of_node; 1019 struct regulator *pll_regulator; 1020 int r; 1021 1022 if (!np) 1023 return 0; 1024 1025 if (of_property_read_bool(np, "syscon-pll-ctrl")) { 1026 dss.syscon_pll_ctrl = syscon_regmap_lookup_by_phandle(np, 1027 "syscon-pll-ctrl"); 1028 if (IS_ERR(dss.syscon_pll_ctrl)) { 1029 dev_err(&pdev->dev, 1030 "failed to get syscon-pll-ctrl regmap\n"); 1031 return PTR_ERR(dss.syscon_pll_ctrl); 1032 } 1033 1034 if (of_property_read_u32_index(np, "syscon-pll-ctrl", 1, 1035 &dss.syscon_pll_ctrl_offset)) { 1036 dev_err(&pdev->dev, 1037 "failed to get syscon-pll-ctrl offset\n"); 1038 return -EINVAL; 1039 } 1040 } 1041 1042 pll_regulator = devm_regulator_get(&pdev->dev, "vdda_video"); 1043 if (IS_ERR(pll_regulator)) { 1044 r = PTR_ERR(pll_regulator); 1045 1046 switch (r) { 1047 case -ENOENT: 1048 pll_regulator = NULL; 1049 break; 1050 1051 case -EPROBE_DEFER: 1052 return -EPROBE_DEFER; 1053 1054 default: 1055 DSSERR("can't get DPLL VDDA regulator\n"); 1056 return r; 1057 } 1058 } 1059 1060 if (of_property_match_string(np, "reg-names", "pll1") >= 0) { 1061 dss.video1_pll = dss_video_pll_init(pdev, 0, pll_regulator); 1062 if (IS_ERR(dss.video1_pll)) 1063 return PTR_ERR(dss.video1_pll); 1064 } 1065 1066 if (of_property_match_string(np, "reg-names", "pll2") >= 0) { 1067 dss.video2_pll = dss_video_pll_init(pdev, 1, pll_regulator); 1068 if (IS_ERR(dss.video2_pll)) { 1069 dss_video_pll_uninit(dss.video1_pll); 1070 return PTR_ERR(dss.video2_pll); 1071 } 1072 } 1073 1074 return 0; 1075 } 1076 1077 /* DSS HW IP initialisation */ 1078 static int dss_bind(struct device *dev) 1079 { 1080 struct platform_device *pdev = to_platform_device(dev); 1081 struct resource *dss_mem; 1082 u32 rev; 1083 int r; 1084 1085 dss.pdev = pdev; 1086 1087 dss.feat = dss_get_features(); 1088 if (!dss.feat) 1089 return -ENODEV; 1090 1091 dss_mem = platform_get_resource(dss.pdev, IORESOURCE_MEM, 0); 1092 if (!dss_mem) { 1093 DSSERR("can't get IORESOURCE_MEM DSS\n"); 1094 return -EINVAL; 1095 } 1096 1097 dss.base = devm_ioremap(&pdev->dev, dss_mem->start, 1098 resource_size(dss_mem)); 1099 if (!dss.base) { 1100 DSSERR("can't ioremap DSS\n"); 1101 return -ENOMEM; 1102 } 1103 1104 r = dss_get_clocks(); 1105 if (r) 1106 return r; 1107 1108 r = dss_setup_default_clock(); 1109 if (r) 1110 goto err_setup_clocks; 1111 1112 r = dss_video_pll_probe(pdev); 1113 if (r) 1114 goto err_pll_init; 1115 1116 r = dss_init_ports(pdev); 1117 if (r) 1118 goto err_init_ports; 1119 1120 pm_runtime_enable(&pdev->dev); 1121 1122 r = dss_runtime_get(); 1123 if (r) 1124 goto err_runtime_get; 1125 1126 dss.dss_clk_rate = clk_get_rate(dss.dss_clk); 1127 1128 /* Select DPLL */ 1129 REG_FLD_MOD(DSS_CONTROL, 0, 0, 0); 1130 1131 dss_select_dispc_clk_source(OMAP_DSS_CLK_SRC_FCK); 1132 1133 #ifdef CONFIG_FB_OMAP2_DSS_VENC 1134 REG_FLD_MOD(DSS_CONTROL, 1, 4, 4); /* venc dac demen */ 1135 REG_FLD_MOD(DSS_CONTROL, 1, 3, 3); /* venc clock 4x enable */ 1136 REG_FLD_MOD(DSS_CONTROL, 0, 2, 2); /* venc clock mode = normal */ 1137 #endif 1138 dss.dsi_clk_source[0] = OMAP_DSS_CLK_SRC_FCK; 1139 dss.dsi_clk_source[1] = OMAP_DSS_CLK_SRC_FCK; 1140 dss.dispc_clk_source = OMAP_DSS_CLK_SRC_FCK; 1141 dss.lcd_clk_source[0] = OMAP_DSS_CLK_SRC_FCK; 1142 dss.lcd_clk_source[1] = OMAP_DSS_CLK_SRC_FCK; 1143 1144 rev = dss_read_reg(DSS_REVISION); 1145 printk(KERN_INFO "OMAP DSS rev %d.%d\n", 1146 FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0)); 1147 1148 dss_runtime_put(); 1149 1150 r = component_bind_all(&pdev->dev, NULL); 1151 if (r) 1152 goto err_component; 1153 1154 dss_debugfs_create_file("dss", dss_dump_regs); 1155 1156 pm_set_vt_switch(0); 1157 1158 dss_initialized = true; 1159 1160 return 0; 1161 1162 err_component: 1163 err_runtime_get: 1164 pm_runtime_disable(&pdev->dev); 1165 dss_uninit_ports(pdev); 1166 err_init_ports: 1167 if (dss.video1_pll) 1168 dss_video_pll_uninit(dss.video1_pll); 1169 1170 if (dss.video2_pll) 1171 dss_video_pll_uninit(dss.video2_pll); 1172 err_pll_init: 1173 err_setup_clocks: 1174 dss_put_clocks(); 1175 return r; 1176 } 1177 1178 static void dss_unbind(struct device *dev) 1179 { 1180 struct platform_device *pdev = to_platform_device(dev); 1181 1182 dss_initialized = false; 1183 1184 component_unbind_all(&pdev->dev, NULL); 1185 1186 if (dss.video1_pll) 1187 dss_video_pll_uninit(dss.video1_pll); 1188 1189 if (dss.video2_pll) 1190 dss_video_pll_uninit(dss.video2_pll); 1191 1192 dss_uninit_ports(pdev); 1193 1194 pm_runtime_disable(&pdev->dev); 1195 1196 dss_put_clocks(); 1197 } 1198 1199 static const struct component_master_ops dss_component_ops = { 1200 .bind = dss_bind, 1201 .unbind = dss_unbind, 1202 }; 1203 1204 static int dss_component_compare(struct device *dev, void *data) 1205 { 1206 struct device *child = data; 1207 return dev == child; 1208 } 1209 1210 static int dss_add_child_component(struct device *dev, void *data) 1211 { 1212 struct component_match **match = data; 1213 1214 /* 1215 * HACK 1216 * We don't have a working driver for rfbi, so skip it here always. 1217 * Otherwise dss will never get probed successfully, as it will wait 1218 * for rfbi to get probed. 1219 */ 1220 if (strstr(dev_name(dev), "rfbi")) 1221 return 0; 1222 1223 component_match_add(dev->parent, match, dss_component_compare, dev); 1224 1225 return 0; 1226 } 1227 1228 static int dss_probe(struct platform_device *pdev) 1229 { 1230 struct component_match *match = NULL; 1231 int r; 1232 1233 /* add all the child devices as components */ 1234 device_for_each_child(&pdev->dev, &match, dss_add_child_component); 1235 1236 r = component_master_add_with_match(&pdev->dev, &dss_component_ops, match); 1237 if (r) 1238 return r; 1239 1240 return 0; 1241 } 1242 1243 static int dss_remove(struct platform_device *pdev) 1244 { 1245 component_master_del(&pdev->dev, &dss_component_ops); 1246 return 0; 1247 } 1248 1249 static int dss_runtime_suspend(struct device *dev) 1250 { 1251 dss_save_context(); 1252 dss_set_min_bus_tput(dev, 0); 1253 1254 pinctrl_pm_select_sleep_state(dev); 1255 1256 return 0; 1257 } 1258 1259 static int dss_runtime_resume(struct device *dev) 1260 { 1261 int r; 1262 1263 pinctrl_pm_select_default_state(dev); 1264 1265 /* 1266 * Set an arbitrarily high tput request to ensure OPP100. 1267 * What we should really do is to make a request to stay in OPP100, 1268 * without any tput requirements, but that is not currently possible 1269 * via the PM layer. 1270 */ 1271 1272 r = dss_set_min_bus_tput(dev, 1000000000); 1273 if (r) 1274 return r; 1275 1276 dss_restore_context(); 1277 return 0; 1278 } 1279 1280 static const struct dev_pm_ops dss_pm_ops = { 1281 .runtime_suspend = dss_runtime_suspend, 1282 .runtime_resume = dss_runtime_resume, 1283 }; 1284 1285 static const struct of_device_id dss_of_match[] = { 1286 { .compatible = "ti,omap2-dss", }, 1287 { .compatible = "ti,omap3-dss", }, 1288 { .compatible = "ti,omap4-dss", }, 1289 { .compatible = "ti,omap5-dss", }, 1290 { .compatible = "ti,dra7-dss", }, 1291 {}, 1292 }; 1293 1294 MODULE_DEVICE_TABLE(of, dss_of_match); 1295 1296 static struct platform_driver omap_dsshw_driver = { 1297 .probe = dss_probe, 1298 .remove = dss_remove, 1299 .driver = { 1300 .name = "omapdss_dss", 1301 .pm = &dss_pm_ops, 1302 .of_match_table = dss_of_match, 1303 .suppress_bind_attrs = true, 1304 }, 1305 }; 1306 1307 int __init dss_init_platform_driver(void) 1308 { 1309 return platform_driver_register(&omap_dsshw_driver); 1310 } 1311 1312 void dss_uninit_platform_driver(void) 1313 { 1314 platform_driver_unregister(&omap_dsshw_driver); 1315 } 1316