kernel/drivers/video/fbdev/omap2/dss/dss.c

   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
  44 #include <video/omapdss.h>
  45
  46 #include "dss.h"
  47 #include "dss_features.h"
  48
  49 #define DSS_SZ_REGS                     SZ_512
  50
  51 struct dss_reg {
  52         u16 idx;
  53 };
  54
  55 #define DSS_REG(idx)                    ((const struct dss_reg) { idx })
  56
  57 #define DSS_REVISION                    DSS_REG(0x0000)
  58 #define DSS_SYSCONFIG                   DSS_REG(0x0010)
  59 #define DSS_SYSSTATUS                   DSS_REG(0x0014)
  60 #define DSS_CONTROL                     DSS_REG(0x0040)
  61 #define DSS_SDI_CONTROL                 DSS_REG(0x0044)
  62 #define DSS_PLL_CONTROL                 DSS_REG(0x0048)
  63 #define DSS_SDI_STATUS                  DSS_REG(0x005C)
  64
  65 #define REG_GET(idx, start, end) \
  66         FLD_GET(dss_read_reg(idx), start, end)
  67
  68 #define REG_FLD_MOD(idx, val, start, end) \
  69         dss_write_reg(idx, FLD_MOD(dss_read_reg(idx), val, start, end))
  70
  71 struct dss_features {
  72         u8 fck_div_max;
  73         u8 dss_fck_multiplier;
  74         const char *parent_clk_name;
  75         const enum omap_display_type *ports;
  76         int num_ports;
  77         int (*dpi_select_source)(int port, enum omap_channel channel);
  78 };
  79
  80 static struct {
  81         struct platform_device *pdev;
  82         void __iomem    *base;
  83         struct regmap   *syscon_pll_ctrl;
  84         u32             syscon_pll_ctrl_offset;
  85
  86         struct clk      *parent_clk;
  87         struct clk      *dss_clk;
  88         unsigned long   dss_clk_rate;
  89
  90         unsigned long   cache_req_pck;
  91         unsigned long   cache_prate;
  92         struct dispc_clock_info cache_dispc_cinfo;
  93
  94         enum omap_dss_clk_source dsi_clk_source[MAX_NUM_DSI];
  95         enum omap_dss_clk_source dispc_clk_source;
  96         enum omap_dss_clk_source lcd_clk_source[MAX_DSS_LCD_MANAGERS];
  97
  98         bool            ctx_valid;
  99         u32             ctx[DSS_SZ_REGS / sizeof(u32)];
 100
 101         const struct dss_features *feat;
 102
 103         struct dss_pll  *video1_pll;
 104         struct dss_pll  *video2_pll;
 105 } dss;
 106
 107 static const char * const dss_generic_clk_source_names[] = {
 108         [OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC]  = "DSI_PLL_HSDIV_DISPC",
 109         [OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DSI]    = "DSI_PLL_HSDIV_DSI",
 110         [OMAP_DSS_CLK_SRC_FCK]                  = "DSS_FCK",
 111         [OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DISPC] = "DSI_PLL2_HSDIV_DISPC",
 112         [OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DSI]   = "DSI_PLL2_HSDIV_DSI",
 113 };
 114
 115 static bool dss_initialized;
 116
 117 bool omapdss_is_initialized(void)
 118 {
 119         return dss_initialized;
 120 }
 121 EXPORT_SYMBOL(omapdss_is_initialized);
 122
 123 static inline void dss_write_reg(const struct dss_reg idx, u32 val)
 124 {
 125         __raw_writel(val, dss.base + idx.idx);
 126 }
 127
 128 static inline u32 dss_read_reg(const struct dss_reg idx)
 129 {
 130         return __raw_readl(dss.base + idx.idx);
 131 }
 132
 133 #define SR(reg) \
 134         dss.ctx[(DSS_##reg).idx / sizeof(u32)] = dss_read_reg(DSS_##reg)
 135 #define RR(reg) \
 136         dss_write_reg(DSS_##reg, dss.ctx[(DSS_##reg).idx / sizeof(u32)])
 137
 138 static void dss_save_context(void)
 139 {
 140         DSSDBG("dss_save_context\n");
 141
 142         SR(CONTROL);
 143
 144         if (dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_LCD) &
 145                         OMAP_DISPLAY_TYPE_SDI) {
 146                 SR(SDI_CONTROL);
 147                 SR(PLL_CONTROL);
 148         }
 149
 150         dss.ctx_valid = true;
 151
 152         DSSDBG("context saved\n");
 153 }
 154
 155 static void dss_restore_context(void)
 156 {
 157         DSSDBG("dss_restore_context\n");
 158
 159         if (!dss.ctx_valid)
 160                 return;
 161
 162         RR(CONTROL);
 163
 164         if (dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_LCD) &
 165                         OMAP_DISPLAY_TYPE_SDI) {
 166                 RR(SDI_CONTROL);
 167                 RR(PLL_CONTROL);
 168         }
 169
 170         DSSDBG("context restored\n");
 171 }
 172
 173 #undef SR
 174 #undef RR
 175
 176 void dss_ctrl_pll_enable(enum dss_pll_id pll_id, bool enable)
 177 {
 178         unsigned shift;
 179         unsigned val;
 180
 181         if (!dss.syscon_pll_ctrl)
 182                 return;
 183
 184         val = !enable;
 185
 186         switch (pll_id) {
 187         case DSS_PLL_VIDEO1:
 188                 shift = 0;
 189                 break;
 190         case DSS_PLL_VIDEO2:
 191                 shift = 1;
 192                 break;
 193         case DSS_PLL_HDMI:
 194                 shift = 2;
 195                 break;
 196         default:
 197                 DSSERR("illegal DSS PLL ID %d\n", pll_id);
 198                 return;
 199         }
 200
 201         regmap_update_bits(dss.syscon_pll_ctrl, dss.syscon_pll_ctrl_offset,
 202                 1 << shift, val << shift);
 203 }
 204
 205 void dss_ctrl_pll_set_control_mux(enum dss_pll_id pll_id,
 206         enum omap_channel channel)
 207 {
 208         unsigned shift, val;
 209
 210         if (!dss.syscon_pll_ctrl)
 211                 return;
 212
 213         switch (channel) {
 214         case OMAP_DSS_CHANNEL_LCD:
 215                 shift = 3;
 216
 217                 switch (pll_id) {
 218                 case DSS_PLL_VIDEO1:
 219                         val = 0; break;
 220                 case DSS_PLL_HDMI:
 221                         val = 1; break;
 222                 default:
 223                         DSSERR("error in PLL mux config for LCD\n");
 224                         return;
 225                 }
 226
 227                 break;
 228         case OMAP_DSS_CHANNEL_LCD2:
 229                 shift = 5;
 230
 231                 switch (pll_id) {
 232                 case DSS_PLL_VIDEO1:
 233                         val = 0; break;
 234                 case DSS_PLL_VIDEO2:
 235                         val = 1; break;
 236                 case DSS_PLL_HDMI:
 237                         val = 2; break;
 238                 default:
 239                         DSSERR("error in PLL mux config for LCD2\n");
 240                         return;
 241                 }
 242
 243                 break;
 244         case OMAP_DSS_CHANNEL_LCD3:
 245                 shift = 7;
 246
 247                 switch (pll_id) {
 248                 case DSS_PLL_VIDEO1:
 249                         val = 1; break;
 250                 case DSS_PLL_VIDEO2:
 251                         val = 0; break;
 252                 case DSS_PLL_HDMI:
 253                         val = 2; break;
 254                 default:
 255                         DSSERR("error in PLL mux config for LCD3\n");
 256                         return;
 257                 }
 258
 259                 break;
 260         default:
 261                 DSSERR("error in PLL mux config\n");
 262                 return;
 263         }
 264
 265         regmap_update_bits(dss.syscon_pll_ctrl, dss.syscon_pll_ctrl_offset,
 266                 0x3 << shift, val << shift);
 267 }
 268
 269 void dss_sdi_init(int datapairs)
 270 {
 271         u32 l;
 272
 273         BUG_ON(datapairs > 3 || datapairs < 1);
 274
 275         l = dss_read_reg(DSS_SDI_CONTROL);
 276         l = FLD_MOD(l, 0xf, 19, 15);            /* SDI_PDIV */
 277         l = FLD_MOD(l, datapairs-1, 3, 2);      /* SDI_PRSEL */
 278         l = FLD_MOD(l, 2, 1, 0);                /* SDI_BWSEL */
 279         dss_write_reg(DSS_SDI_CONTROL, l);
 280
 281         l = dss_read_reg(DSS_PLL_CONTROL);
 282         l = FLD_MOD(l, 0x7, 25, 22);    /* SDI_PLL_FREQSEL */
 283         l = FLD_MOD(l, 0xb, 16, 11);    /* SDI_PLL_REGN */
 284         l = FLD_MOD(l, 0xb4, 10, 1);    /* SDI_PLL_REGM */
 285         dss_write_reg(DSS_PLL_CONTROL, l);
 286 }
 287
 288 int dss_sdi_enable(void)
 289 {
 290         unsigned long timeout;
 291
 292         dispc_pck_free_enable(1);
 293
 294         /* Reset SDI PLL */
 295         REG_FLD_MOD(DSS_PLL_CONTROL, 1, 18, 18); /* SDI_PLL_SYSRESET */
 296         udelay(1);      /* wait 2x PCLK */
 297
 298         /* Lock SDI PLL */
 299         REG_FLD_MOD(DSS_PLL_CONTROL, 1, 28, 28); /* SDI_PLL_GOBIT */
 300
 301         /* Waiting for PLL lock request to complete */
 302         timeout = jiffies + msecs_to_jiffies(500);
 303         while (dss_read_reg(DSS_SDI_STATUS) & (1 << 6)) {
 304                 if (time_after_eq(jiffies, timeout)) {
 305                         DSSERR("PLL lock request timed out\n");
 306                         goto err1;
 307                 }
 308         }
 309
 310         /* Clearing PLL_GO bit */
 311         REG_FLD_MOD(DSS_PLL_CONTROL, 0, 28, 28);
 312
 313         /* Waiting for PLL to lock */
 314         timeout = jiffies + msecs_to_jiffies(500);
 315         while (!(dss_read_reg(DSS_SDI_STATUS) & (1 << 5))) {
 316                 if (time_after_eq(jiffies, timeout)) {
 317                         DSSERR("PLL lock timed out\n");
 318                         goto err1;
 319                 }
 320         }
 321
 322         dispc_lcd_enable_signal(1);
 323
 324         /* Waiting for SDI reset to complete */
 325         timeout = jiffies + msecs_to_jiffies(500);
 326         while (!(dss_read_reg(DSS_SDI_STATUS) & (1 << 2))) {
 327                 if (time_after_eq(jiffies, timeout)) {
 328                         DSSERR("SDI reset timed out\n");
 329                         goto err2;
 330                 }
 331         }
 332
 333         return 0;
 334
 335  err2:
 336         dispc_lcd_enable_signal(0);
 337  err1:
 338         /* Reset SDI PLL */
 339         REG_FLD_MOD(DSS_PLL_CONTROL, 0, 18, 18); /* SDI_PLL_SYSRESET */
 340
 341         dispc_pck_free_enable(0);
 342
 343         return -ETIMEDOUT;
 344 }
 345
 346 void dss_sdi_disable(void)
 347 {
 348         dispc_lcd_enable_signal(0);
 349
 350         dispc_pck_free_enable(0);
 351
 352         /* Reset SDI PLL */
 353         REG_FLD_MOD(DSS_PLL_CONTROL, 0, 18, 18); /* SDI_PLL_SYSRESET */
 354 }
 355
 356 const char *dss_get_generic_clk_source_name(enum omap_dss_clk_source clk_src)
 357 {
 358         return dss_generic_clk_source_names[clk_src];
 359 }
 360
 361 void dss_dump_clocks(struct seq_file *s)
 362 {
 363         const char *fclk_name, *fclk_real_name;
 364         unsigned long fclk_rate;
 365
 366         if (dss_runtime_get())
 367                 return;
 368
 369         seq_printf(s, "- DSS -\n");
 370
 371         fclk_name = dss_get_generic_clk_source_name(OMAP_DSS_CLK_SRC_FCK);
 372         fclk_real_name = dss_feat_get_clk_source_name(OMAP_DSS_CLK_SRC_FCK);
 373         fclk_rate = clk_get_rate(dss.dss_clk);
 374
 375         seq_printf(s, "%s (%s) = %lu\n",
 376                         fclk_name, fclk_real_name,
 377                         fclk_rate);
 378
 379         dss_runtime_put();
 380 }
 381
 382 static void dss_dump_regs(struct seq_file *s)
 383 {
 384 #define DUMPREG(r) seq_printf(s, "%-35s %08x\n", #r, dss_read_reg(r))
 385
 386         if (dss_runtime_get())
 387                 return;
 388
 389         DUMPREG(DSS_REVISION);
 390         DUMPREG(DSS_SYSCONFIG);
 391         DUMPREG(DSS_SYSSTATUS);
 392         DUMPREG(DSS_CONTROL);
 393
 394         if (dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_LCD) &
 395                         OMAP_DISPLAY_TYPE_SDI) {
 396                 DUMPREG(DSS_SDI_CONTROL);
 397                 DUMPREG(DSS_PLL_CONTROL);
 398                 DUMPREG(DSS_SDI_STATUS);
 399         }
 400
 401         dss_runtime_put();
 402 #undef DUMPREG
 403 }
 404
 405 static void dss_select_dispc_clk_source(enum omap_dss_clk_source clk_src)
 406 {
 407         int b;
 408         u8 start, end;
 409
 410         switch (clk_src) {
 411         case OMAP_DSS_CLK_SRC_FCK:
 412                 b = 0;
 413                 break;
 414         case OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC:
 415                 b = 1;
 416                 break;
 417         case OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DISPC:
 418                 b = 2;
 419                 break;
 420         default:
 421                 BUG();
 422                 return;
 423         }
 424
 425         dss_feat_get_reg_field(FEAT_REG_DISPC_CLK_SWITCH, &start, &end);
 426
 427         REG_FLD_MOD(DSS_CONTROL, b, start, end);        /* DISPC_CLK_SWITCH */
 428
 429         dss.dispc_clk_source = clk_src;
 430 }
 431
 432 void dss_select_dsi_clk_source(int dsi_module,
 433                 enum omap_dss_clk_source clk_src)
 434 {
 435         int b, pos;
 436
 437         switch (clk_src) {
 438         case OMAP_DSS_CLK_SRC_FCK:
 439                 b = 0;
 440                 break;
 441         case OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DSI:
 442                 BUG_ON(dsi_module != 0);
 443                 b = 1;
 444                 break;
 445         case OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DSI:
 446                 BUG_ON(dsi_module != 1);
 447                 b = 1;
 448                 break;
 449         default:
 450                 BUG();
 451                 return;
 452         }
 453
 454         pos = dsi_module == 0 ? 1 : 10;
 455         REG_FLD_MOD(DSS_CONTROL, b, pos, pos);  /* DSIx_CLK_SWITCH */
 456
 457         dss.dsi_clk_source[dsi_module] = clk_src;
 458 }
 459
 460 void dss_select_lcd_clk_source(enum omap_channel channel,
 461                 enum omap_dss_clk_source clk_src)
 462 {
 463         int b, ix, pos;
 464
 465         if (!dss_has_feature(FEAT_LCD_CLK_SRC)) {
 466                 dss_select_dispc_clk_source(clk_src);
 467                 return;
 468         }
 469
 470         switch (clk_src) {
 471         case OMAP_DSS_CLK_SRC_FCK:
 472                 b = 0;
 473                 break;
 474         case OMAP_DSS_CLK_SRC_DSI_PLL_HSDIV_DISPC:
 475                 BUG_ON(channel != OMAP_DSS_CHANNEL_LCD);
 476                 b = 1;
 477                 break;
 478         case OMAP_DSS_CLK_SRC_DSI2_PLL_HSDIV_DISPC:
 479                 BUG_ON(channel != OMAP_DSS_CHANNEL_LCD2 &&
 480                        channel != OMAP_DSS_CHANNEL_LCD3);
 481                 b = 1;
 482                 break;
 483         default:
 484                 BUG();
 485                 return;
 486         }
 487
 488         pos = channel == OMAP_DSS_CHANNEL_LCD ? 0 :
 489              (channel == OMAP_DSS_CHANNEL_LCD2 ? 12 : 19);
 490         REG_FLD_MOD(DSS_CONTROL, b, pos, pos);  /* LCDx_CLK_SWITCH */
 491
 492         ix = channel == OMAP_DSS_CHANNEL_LCD ? 0 :
 493             (channel == OMAP_DSS_CHANNEL_LCD2 ? 1 : 2);
 494         dss.lcd_clk_source[ix] = clk_src;
 495 }
 496
 497 enum omap_dss_clk_source dss_get_dispc_clk_source(void)
 498 {
 499         return dss.dispc_clk_source;
 500 }
 501
 502 enum omap_dss_clk_source dss_get_dsi_clk_source(int dsi_module)
 503 {
 504         return dss.dsi_clk_source[dsi_module];
 505 }
 506
 507 enum omap_dss_clk_source dss_get_lcd_clk_source(enum omap_channel channel)
 508 {
 509         if (dss_has_feature(FEAT_LCD_CLK_SRC)) {
 510                 int ix = channel == OMAP_DSS_CHANNEL_LCD ? 0 :
 511                         (channel == OMAP_DSS_CHANNEL_LCD2 ? 1 : 2);
 512                 return dss.lcd_clk_source[ix];
 513         } else {
 514                 /* LCD_CLK source is the same as DISPC_FCLK source for
 515                  * OMAP2 and OMAP3 */
 516                 return dss.dispc_clk_source;
 517         }
 518 }
 519
 520 bool dss_div_calc(unsigned long pck, unsigned long fck_min,
 521                 dss_div_calc_func func, void *data)
 522 {
 523         int fckd, fckd_start, fckd_stop;
 524         unsigned long fck;
 525         unsigned long fck_hw_max;
 526         unsigned long fckd_hw_max;
 527         unsigned long prate;
 528         unsigned m;
 529
 530         fck_hw_max = dss_feat_get_param_max(FEAT_PARAM_DSS_FCK);
 531
 532         if (dss.parent_clk == NULL) {
 533                 unsigned pckd;
 534
 535                 pckd = fck_hw_max / pck;
 536
 537                 fck = pck * pckd;
 538
 539                 fck = clk_round_rate(dss.dss_clk, fck);
 540
 541                 return func(fck, data);
 542         }
 543
 544         fckd_hw_max = dss.feat->fck_div_max;
 545
 546         m = dss.feat->dss_fck_multiplier;
 547         prate = clk_get_rate(dss.parent_clk);
 548
 549         fck_min = fck_min ? fck_min : 1;
 550
 551         fckd_start = min(prate * m / fck_min, fckd_hw_max);
 552         fckd_stop = max(DIV_ROUND_UP(prate * m, fck_hw_max), 1ul);
 553
 554         for (fckd = fckd_start; fckd >= fckd_stop; --fckd) {
 555                 fck = DIV_ROUND_UP(prate, fckd) * m;
 556
 557                 if (func(fck, data))
 558                         return true;
 559         }
 560
 561         return false;
 562 }
 563
 564 int dss_set_fck_rate(unsigned long rate)
 565 {
 566         int r;
 567
 568         DSSDBG("set fck to %lu\n", rate);
 569
 570         r = clk_set_rate(dss.dss_clk, rate);
 571         if (r)
 572                 return r;
 573
 574         dss.dss_clk_rate = clk_get_rate(dss.dss_clk);
 575
 576         WARN_ONCE(dss.dss_clk_rate != rate,
 577                         "clk rate mismatch: %lu != %lu", dss.dss_clk_rate,
 578                         rate);
 579
 580         return 0;
 581 }
 582
 583 unsigned long dss_get_dispc_clk_rate(void)
 584 {
 585         return dss.dss_clk_rate;
 586 }
 587
 588 static int dss_setup_default_clock(void)
 589 {
 590         unsigned long max_dss_fck, prate;
 591         unsigned long fck;
 592         unsigned fck_div;
 593         int r;
 594
 595         max_dss_fck = dss_feat_get_param_max(FEAT_PARAM_DSS_FCK);
 596
 597         if (dss.parent_clk == NULL) {
 598                 fck = clk_round_rate(dss.dss_clk, max_dss_fck);
 599         } else {
 600                 prate = clk_get_rate(dss.parent_clk);
 601
 602                 fck_div = DIV_ROUND_UP(prate * dss.feat->dss_fck_multiplier,
 603                                 max_dss_fck);
 604                 fck = DIV_ROUND_UP(prate, fck_div) * dss.feat->dss_fck_multiplier;
 605         }
 606
 607         r = dss_set_fck_rate(fck);
 608         if (r)
 609                 return r;
 610
 611         return 0;
 612 }
 613
 614 void dss_set_venc_output(enum omap_dss_venc_type type)
 615 {
 616         int l = 0;
 617
 618         if (type == OMAP_DSS_VENC_TYPE_COMPOSITE)
 619                 l = 0;
 620         else if (type == OMAP_DSS_VENC_TYPE_SVIDEO)
 621                 l = 1;
 622         else
 623                 BUG();
 624
 625         /* venc out selection. 0 = comp, 1 = svideo */
 626         REG_FLD_MOD(DSS_CONTROL, l, 6, 6);
 627 }
 628
 629 void dss_set_dac_pwrdn_bgz(bool enable)
 630 {
 631         REG_FLD_MOD(DSS_CONTROL, enable, 5, 5); /* DAC Power-Down Control */
 632 }
 633
 634 void dss_select_hdmi_venc_clk_source(enum dss_hdmi_venc_clk_source_select src)
 635 {
 636         enum omap_display_type dp;
 637         dp = dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_DIGIT);
 638
 639         /* Complain about invalid selections */
 640         WARN_ON((src == DSS_VENC_TV_CLK) && !(dp & OMAP_DISPLAY_TYPE_VENC));
 641         WARN_ON((src == DSS_HDMI_M_PCLK) && !(dp & OMAP_DISPLAY_TYPE_HDMI));
 642
 643         /* Select only if we have options */
 644         if ((dp & OMAP_DISPLAY_TYPE_VENC) && (dp & OMAP_DISPLAY_TYPE_HDMI))
 645                 REG_FLD_MOD(DSS_CONTROL, src, 15, 15);  /* VENC_HDMI_SWITCH */
 646 }
 647
 648 enum dss_hdmi_venc_clk_source_select dss_get_hdmi_venc_clk_source(void)
 649 {
 650         enum omap_display_type displays;
 651
 652         displays = dss_feat_get_supported_displays(OMAP_DSS_CHANNEL_DIGIT);
 653         if ((displays & OMAP_DISPLAY_TYPE_HDMI) == 0)
 654                 return DSS_VENC_TV_CLK;
 655
 656         if ((displays & OMAP_DISPLAY_TYPE_VENC) == 0)
 657                 return DSS_HDMI_M_PCLK;
 658
 659         return REG_GET(DSS_CONTROL, 15, 15);
 660 }
 661
 662 static int dss_dpi_select_source_omap2_omap3(int port, enum omap_channel channel)
 663 {
 664         if (channel != OMAP_DSS_CHANNEL_LCD)
 665                 return -EINVAL;
 666
 667         return 0;
 668 }
 669
 670 static int dss_dpi_select_source_omap4(int port, enum omap_channel channel)
 671 {
 672         int val;
 673
 674         switch (channel) {
 675         case OMAP_DSS_CHANNEL_LCD2:
 676                 val = 0;
 677                 break;
 678         case OMAP_DSS_CHANNEL_DIGIT:
 679                 val = 1;
 680                 break;
 681         default:
 682                 return -EINVAL;
 683         }
 684
 685         REG_FLD_MOD(DSS_CONTROL, val, 17, 17);
 686
 687         return 0;
 688 }
 689
 690 static int dss_dpi_select_source_omap5(int port, enum omap_channel channel)
 691 {
 692         int val;
 693
 694         switch (channel) {
 695         case OMAP_DSS_CHANNEL_LCD:
 696                 val = 1;
 697                 break;
 698         case OMAP_DSS_CHANNEL_LCD2:
 699                 val = 2;
 700                 break;
 701         case OMAP_DSS_CHANNEL_LCD3:
 702                 val = 3;
 703                 break;
 704         case OMAP_DSS_CHANNEL_DIGIT:
 705                 val = 0;
 706                 break;
 707         default:
 708                 return -EINVAL;
 709         }
 710
 711         REG_FLD_MOD(DSS_CONTROL, val, 17, 16);
 712
 713         return 0;
 714 }
 715
 716 static int dss_dpi_select_source_dra7xx(int port, enum omap_channel channel)
 717 {
 718         switch (port) {
 719         case 0:
 720                 return dss_dpi_select_source_omap5(port, channel);
 721         case 1:
 722                 if (channel != OMAP_DSS_CHANNEL_LCD2)
 723                         return -EINVAL;
 724                 break;
 725         case 2:
 726                 if (channel != OMAP_DSS_CHANNEL_LCD3)
 727                         return -EINVAL;
 728                 break;
 729         default:
 730                 return -EINVAL;
 731         }
 732
 733         return 0;
 734 }
 735
 736 int dss_dpi_select_source(int port, enum omap_channel channel)
 737 {
 738         return dss.feat->dpi_select_source(port, channel);
 739 }
 740
 741 static int dss_get_clocks(void)
 742 {
 743         struct clk *clk;
 744
 745         clk = devm_clk_get(&dss.pdev->dev, "fck");
 746         if (IS_ERR(clk)) {
 747                 DSSERR("can't get clock fck\n");
 748                 return PTR_ERR(clk);
 749         }
 750
 751         dss.dss_clk = clk;
 752
 753         if (dss.feat->parent_clk_name) {
 754                 clk = clk_get(NULL, dss.feat->parent_clk_name);
 755                 if (IS_ERR(clk)) {
 756                         DSSERR("Failed to get %s\n", dss.feat->parent_clk_name);
 757                         return PTR_ERR(clk);
 758                 }
 759         } else {
 760                 clk = NULL;
 761         }
 762
 763         dss.parent_clk = clk;
 764
 765         return 0;
 766 }
 767
 768 static void dss_put_clocks(void)
 769 {
 770         if (dss.parent_clk)
 771                 clk_put(dss.parent_clk);
 772 }
 773
 774 int dss_runtime_get(void)
 775 {
 776         int r;
 777
 778         DSSDBG("dss_runtime_get\n");
 779
 780         r = pm_runtime_get_sync(&dss.pdev->dev);
 781         WARN_ON(r < 0);
 782         return r < 0 ? r : 0;
 783 }
 784
 785 void dss_runtime_put(void)
 786 {
 787         int r;
 788
 789         DSSDBG("dss_runtime_put\n");
 790
 791         r = pm_runtime_put_sync(&dss.pdev->dev);
 792         WARN_ON(r < 0 && r != -ENOSYS && r != -EBUSY);
 793 }
 794
 795 /* DEBUGFS */
 796 #if defined(CONFIG_OMAP2_DSS_DEBUGFS)
 797 void dss_debug_dump_clocks(struct seq_file *s)
 798 {
 799         dss_dump_clocks(s);
 800         dispc_dump_clocks(s);
 801 #ifdef CONFIG_OMAP2_DSS_DSI
 802         dsi_dump_clocks(s);
 803 #endif
 804 }
 805 #endif
 806
 807
 808 static const enum omap_display_type omap2plus_ports[] = {
 809         OMAP_DISPLAY_TYPE_DPI,
 810 };
 811
 812 static const enum omap_display_type omap34xx_ports[] = {
 813         OMAP_DISPLAY_TYPE_DPI,
 814         OMAP_DISPLAY_TYPE_SDI,
 815 };
 816
 817 static const enum omap_display_type dra7xx_ports[] = {
 818         OMAP_DISPLAY_TYPE_DPI,
 819         OMAP_DISPLAY_TYPE_DPI,
 820         OMAP_DISPLAY_TYPE_DPI,
 821 };
 822
 823 static const struct dss_features omap24xx_dss_feats = {
 824         /*
 825          * fck div max is really 16, but the divider range has gaps. The range
 826          * from 1 to 6 has no gaps, so let's use that as a max.
 827          */
 828         .fck_div_max            =       6,
 829         .dss_fck_multiplier     =       2,
 830         .parent_clk_name        =       "core_ck",
 831         .dpi_select_source      =       &dss_dpi_select_source_omap2_omap3,
 832         .ports                  =       omap2plus_ports,
 833         .num_ports              =       ARRAY_SIZE(omap2plus_ports),
 834 };
 835
 836 static const struct dss_features omap34xx_dss_feats = {
 837         .fck_div_max            =       16,
 838         .dss_fck_multiplier     =       2,
 839         .parent_clk_name        =       "dpll4_ck",
 840         .dpi_select_source      =       &dss_dpi_select_source_omap2_omap3,
 841         .ports                  =       omap34xx_ports,
 842         .num_ports              =       ARRAY_SIZE(omap34xx_ports),
 843 };
 844
 845 static const struct dss_features omap3630_dss_feats = {
 846         .fck_div_max            =       32,
 847         .dss_fck_multiplier     =       1,
 848         .parent_clk_name        =       "dpll4_ck",
 849         .dpi_select_source      =       &dss_dpi_select_source_omap2_omap3,
 850         .ports                  =       omap2plus_ports,
 851         .num_ports              =       ARRAY_SIZE(omap2plus_ports),
 852 };
 853
 854 static const struct dss_features omap44xx_dss_feats = {
 855         .fck_div_max            =       32,
 856         .dss_fck_multiplier     =       1,
 857         .parent_clk_name        =       "dpll_per_x2_ck",
 858         .dpi_select_source      =       &dss_dpi_select_source_omap4,
 859         .ports                  =       omap2plus_ports,
 860         .num_ports              =       ARRAY_SIZE(omap2plus_ports),
 861 };
 862
 863 static const struct dss_features omap54xx_dss_feats = {
 864         .fck_div_max            =       64,
 865         .dss_fck_multiplier     =       1,
 866         .parent_clk_name        =       "dpll_per_x2_ck",
 867         .dpi_select_source      =       &dss_dpi_select_source_omap5,
 868         .ports                  =       omap2plus_ports,
 869         .num_ports              =       ARRAY_SIZE(omap2plus_ports),
 870 };
 871
 872 static const struct dss_features am43xx_dss_feats = {
 873         .fck_div_max            =       0,
 874         .dss_fck_multiplier     =       0,
 875         .parent_clk_name        =       NULL,
 876         .dpi_select_source      =       &dss_dpi_select_source_omap2_omap3,
 877         .ports                  =       omap2plus_ports,
 878         .num_ports              =       ARRAY_SIZE(omap2plus_ports),
 879 };
 880
 881 static const struct dss_features dra7xx_dss_feats = {
 882         .fck_div_max            =       64,
 883         .dss_fck_multiplier     =       1,
 884         .parent_clk_name        =       "dpll_per_x2_ck",
 885         .dpi_select_source      =       &dss_dpi_select_source_dra7xx,
 886         .ports                  =       dra7xx_ports,
 887         .num_ports              =       ARRAY_SIZE(dra7xx_ports),
 888 };
 889
 890 static int dss_init_features(struct platform_device *pdev)
 891 {
 892         const struct dss_features *src;
 893         struct dss_features *dst;
 894
 895         dst = devm_kzalloc(&pdev->dev, sizeof(*dst), GFP_KERNEL);
 896         if (!dst) {
 897                 dev_err(&pdev->dev, "Failed to allocate local DSS Features\n");
 898                 return -ENOMEM;
 899         }
 900
 901         switch (omapdss_get_version()) {
 902         case OMAPDSS_VER_OMAP24xx:
 903                 src = &omap24xx_dss_feats;
 904                 break;
 905
 906         case OMAPDSS_VER_OMAP34xx_ES1:
 907         case OMAPDSS_VER_OMAP34xx_ES3:
 908         case OMAPDSS_VER_AM35xx:
 909                 src = &omap34xx_dss_feats;
 910                 break;
 911
 912         case OMAPDSS_VER_OMAP3630:
 913                 src = &omap3630_dss_feats;
 914                 break;
 915
 916         case OMAPDSS_VER_OMAP4430_ES1:
 917         case OMAPDSS_VER_OMAP4430_ES2:
 918         case OMAPDSS_VER_OMAP4:
 919                 src = &omap44xx_dss_feats;
 920                 break;
 921
 922         case OMAPDSS_VER_OMAP5:
 923                 src = &omap54xx_dss_feats;
 924                 break;
 925
 926         case OMAPDSS_VER_AM43xx:
 927                 src = &am43xx_dss_feats;
 928                 break;
 929
 930         case OMAPDSS_VER_DRA7xx:
 931                 src = &dra7xx_dss_feats;
 932                 break;
 933
 934         default:
 935                 return -ENODEV;
 936         }
 937
 938         memcpy(dst, src, sizeof(*dst));
 939         dss.feat = dst;
 940
 941         return 0;
 942 }
 943
 944 static int dss_init_ports(struct platform_device *pdev)
 945 {
 946         struct device_node *parent = pdev->dev.of_node;
 947         struct device_node *port;
 948         int r;
 949
 950         if (parent == NULL)
 951                 return 0;
 952
 953         port = omapdss_of_get_next_port(parent, NULL);
 954         if (!port)
 955                 return 0;
 956
 957         if (dss.feat->num_ports == 0)
 958                 return 0;
 959
 960         do {
 961                 enum omap_display_type port_type;
 962                 u32 reg;
 963
 964                 r = of_property_read_u32(port, "reg", &reg);
 965                 if (r)
 966                         reg = 0;
 967
 968                 if (reg >= dss.feat->num_ports)
 969                         continue;
 970
 971                 port_type = dss.feat->ports[reg];
 972
 973                 switch (port_type) {
 974                 case OMAP_DISPLAY_TYPE_DPI:
 975                         dpi_init_port(pdev, port);
 976                         break;
 977                 case OMAP_DISPLAY_TYPE_SDI:
 978                         sdi_init_port(pdev, port);
 979                         break;
 980                 default:
 981                         break;
 982                 }
 983         } while ((port = omapdss_of_get_next_port(parent, port)) != NULL);
 984
 985         return 0;
 986 }
 987
 988 static void dss_uninit_ports(struct platform_device *pdev)
 989 {
 990         struct device_node *parent = pdev->dev.of_node;
 991         struct device_node *port;
 992
 993         if (parent == NULL)
 994                 return;
 995
 996         port = omapdss_of_get_next_port(parent, NULL);
 997         if (!port)
 998                 return;
 999
1000         if (dss.feat->num_ports == 0)
1001                 return;
1002
1003         do {
1004                 enum omap_display_type port_type;
1005                 u32 reg;
1006                 int r;
1007
1008                 r = of_property_read_u32(port, "reg", &reg);
1009                 if (r)
1010                         reg = 0;
1011
1012                 if (reg >= dss.feat->num_ports)
1013                         continue;
1014
1015                 port_type = dss.feat->ports[reg];
1016
1017                 switch (port_type) {
1018                 case OMAP_DISPLAY_TYPE_DPI:
1019                         dpi_uninit_port(port);
1020                         break;
1021                 case OMAP_DISPLAY_TYPE_SDI:
1022                         sdi_uninit_port(port);
1023                         break;
1024                 default:
1025                         break;
1026                 }
1027         } while ((port = omapdss_of_get_next_port(parent, port)) != NULL);
1028 }
1029
1030 static int dss_video_pll_probe(struct platform_device *pdev)
1031 {
1032         struct device_node *np = pdev->dev.of_node;
1033         struct regulator *pll_regulator;
1034         int r;
1035
1036         if (!np)
1037                 return 0;
1038
1039         if (of_property_read_bool(np, "syscon-pll-ctrl")) {
1040                 dss.syscon_pll_ctrl = syscon_regmap_lookup_by_phandle(np,
1041                         "syscon-pll-ctrl");
1042                 if (IS_ERR(dss.syscon_pll_ctrl)) {
1043                         dev_err(&pdev->dev,
1044                                 "failed to get syscon-pll-ctrl regmap\n");
1045                         return PTR_ERR(dss.syscon_pll_ctrl);
1046                 }
1047
1048                 if (of_property_read_u32_index(np, "syscon-pll-ctrl", 1,
1049                                 &dss.syscon_pll_ctrl_offset)) {
1050                         dev_err(&pdev->dev,
1051                                 "failed to get syscon-pll-ctrl offset\n");
1052                         return -EINVAL;
1053                 }
1054         }
1055
1056         pll_regulator = devm_regulator_get(&pdev->dev, "vdda_video");
1057         if (IS_ERR(pll_regulator)) {
1058                 r = PTR_ERR(pll_regulator);
1059
1060                 switch (r) {
1061                 case -ENOENT:
1062                         pll_regulator = NULL;
1063                         break;
1064
1065                 case -EPROBE_DEFER:
1066                         return -EPROBE_DEFER;
1067
1068                 default:
1069                         DSSERR("can't get DPLL VDDA regulator\n");
1070                         return r;
1071                 }
1072         }
1073
1074         if (of_property_match_string(np, "reg-names", "pll1") >= 0) {
1075                 dss.video1_pll = dss_video_pll_init(pdev, 0, pll_regulator);
1076                 if (IS_ERR(dss.video1_pll))
1077                         return PTR_ERR(dss.video1_pll);
1078         }
1079
1080         if (of_property_match_string(np, "reg-names", "pll2") >= 0) {
1081                 dss.video2_pll = dss_video_pll_init(pdev, 1, pll_regulator);
1082                 if (IS_ERR(dss.video2_pll)) {
1083                         dss_video_pll_uninit(dss.video1_pll);
1084                         return PTR_ERR(dss.video2_pll);
1085                 }
1086         }
1087
1088         return 0;
1089 }
1090
1091 /* DSS HW IP initialisation */
1092 static int dss_bind(struct device *dev)
1093 {
1094         struct platform_device *pdev = to_platform_device(dev);
1095         struct resource *dss_mem;
1096         u32 rev;
1097         int r;
1098
1099         dss.pdev = pdev;
1100
1101         r = dss_init_features(dss.pdev);
1102         if (r)
1103                 return r;
1104
1105         dss_mem = platform_get_resource(dss.pdev, IORESOURCE_MEM, 0);
1106         if (!dss_mem) {
1107                 DSSERR("can't get IORESOURCE_MEM DSS\n");
1108                 return -EINVAL;
1109         }
1110
1111         dss.base = devm_ioremap(&pdev->dev, dss_mem->start,
1112                                 resource_size(dss_mem));
1113         if (!dss.base) {
1114                 DSSERR("can't ioremap DSS\n");
1115                 return -ENOMEM;
1116         }
1117
1118         r = dss_get_clocks();
1119         if (r)
1120                 return r;
1121
1122         r = dss_setup_default_clock();
1123         if (r)
1124                 goto err_setup_clocks;
1125
1126         r = dss_video_pll_probe(pdev);
1127         if (r)
1128                 goto err_pll_init;
1129
1130         r = dss_init_ports(pdev);
1131         if (r)
1132                 goto err_init_ports;
1133
1134         pm_runtime_enable(&pdev->dev);
1135
1136         r = dss_runtime_get();
1137         if (r)
1138                 goto err_runtime_get;
1139
1140         dss.dss_clk_rate = clk_get_rate(dss.dss_clk);
1141
1142         /* Select DPLL */
1143         REG_FLD_MOD(DSS_CONTROL, 0, 0, 0);
1144
1145         dss_select_dispc_clk_source(OMAP_DSS_CLK_SRC_FCK);
1146
1147 #ifdef CONFIG_OMAP2_DSS_VENC
1148         REG_FLD_MOD(DSS_CONTROL, 1, 4, 4);      /* venc dac demen */
1149         REG_FLD_MOD(DSS_CONTROL, 1, 3, 3);      /* venc clock 4x enable */
1150         REG_FLD_MOD(DSS_CONTROL, 0, 2, 2);      /* venc clock mode = normal */
1151 #endif
1152         dss.dsi_clk_source[0] = OMAP_DSS_CLK_SRC_FCK;
1153         dss.dsi_clk_source[1] = OMAP_DSS_CLK_SRC_FCK;
1154         dss.dispc_clk_source = OMAP_DSS_CLK_SRC_FCK;
1155         dss.lcd_clk_source[0] = OMAP_DSS_CLK_SRC_FCK;
1156         dss.lcd_clk_source[1] = OMAP_DSS_CLK_SRC_FCK;
1157
1158         rev = dss_read_reg(DSS_REVISION);
1159         printk(KERN_INFO "OMAP DSS rev %d.%d\n",
1160                         FLD_GET(rev, 7, 4), FLD_GET(rev, 3, 0));
1161
1162         dss_runtime_put();
1163
1164         r = component_bind_all(&pdev->dev, NULL);
1165         if (r)
1166                 goto err_component;
1167
1168         dss_debugfs_create_file("dss", dss_dump_regs);
1169
1170         pm_set_vt_switch(0);
1171
1172         dss_initialized = true;
1173
1174         return 0;
1175
1176 err_component:
1177 err_runtime_get:
1178         pm_runtime_disable(&pdev->dev);
1179         dss_uninit_ports(pdev);
1180 err_init_ports:
1181         if (dss.video1_pll)
1182                 dss_video_pll_uninit(dss.video1_pll);
1183
1184         if (dss.video2_pll)
1185                 dss_video_pll_uninit(dss.video2_pll);
1186 err_pll_init:
1187 err_setup_clocks:
1188         dss_put_clocks();
1189         return r;
1190 }
1191
1192 static void dss_unbind(struct device *dev)
1193 {
1194         struct platform_device *pdev = to_platform_device(dev);
1195
1196         dss_initialized = false;
1197
1198         component_unbind_all(&pdev->dev, NULL);
1199
1200         if (dss.video1_pll)
1201                 dss_video_pll_uninit(dss.video1_pll);
1202
1203         if (dss.video2_pll)
1204                 dss_video_pll_uninit(dss.video2_pll);
1205
1206         dss_uninit_ports(pdev);
1207
1208         pm_runtime_disable(&pdev->dev);
1209
1210         dss_put_clocks();
1211 }
1212
1213 static const struct component_master_ops dss_component_ops = {
1214         .bind = dss_bind,
1215         .unbind = dss_unbind,
1216 };
1217
1218 static int dss_component_compare(struct device *dev, void *data)
1219 {
1220         struct device *child = data;
1221         return dev == child;
1222 }
1223
1224 static int dss_add_child_component(struct device *dev, void *data)
1225 {
1226         struct component_match **match = data;
1227
1228         /*
1229          * HACK
1230          * We don't have a working driver for rfbi, so skip it here always.
1231          * Otherwise dss will never get probed successfully, as it will wait
1232          * for rfbi to get probed.
1233          */
1234         if (strstr(dev_name(dev), "rfbi"))
1235                 return 0;
1236
1237         component_match_add(dev->parent, match, dss_component_compare, dev);
1238
1239         return 0;
1240 }
1241
1242 static int dss_probe(struct platform_device *pdev)
1243 {
1244         struct component_match *match = NULL;
1245         int r;
1246
1247         /* add all the child devices as components */
1248         device_for_each_child(&pdev->dev, &match, dss_add_child_component);
1249
1250         r = component_master_add_with_match(&pdev->dev, &dss_component_ops, match);
1251         if (r)
1252                 return r;
1253
1254         return 0;
1255 }
1256
1257 static int dss_remove(struct platform_device *pdev)
1258 {
1259         component_master_del(&pdev->dev, &dss_component_ops);
1260         return 0;
1261 }
1262
1263 static int dss_runtime_suspend(struct device *dev)
1264 {
1265         dss_save_context();
1266         dss_set_min_bus_tput(dev, 0);
1267         return 0;
1268 }
1269
1270 static int dss_runtime_resume(struct device *dev)
1271 {
1272         int r;
1273         /*
1274          * Set an arbitrarily high tput request to ensure OPP100.
1275          * What we should really do is to make a request to stay in OPP100,
1276          * without any tput requirements, but that is not currently possible
1277          * via the PM layer.
1278          */
1279
1280         r = dss_set_min_bus_tput(dev, 1000000000);
1281         if (r)
1282                 return r;
1283
1284         dss_restore_context();
1285         return 0;
1286 }
1287
1288 static const struct dev_pm_ops dss_pm_ops = {
1289         .runtime_suspend = dss_runtime_suspend,
1290         .runtime_resume = dss_runtime_resume,
1291 };
1292
1293 static const struct of_device_id dss_of_match[] = {
1294         { .compatible = "ti,omap2-dss", },
1295         { .compatible = "ti,omap3-dss", },
1296         { .compatible = "ti,omap4-dss", },
1297         { .compatible = "ti,omap5-dss", },
1298         { .compatible = "ti,dra7-dss", },
1299         {},
1300 };
1301
1302 MODULE_DEVICE_TABLE(of, dss_of_match);
1303
1304 static struct platform_driver omap_dsshw_driver = {
1305         .probe          = dss_probe,
1306         .remove         = dss_remove,
1307         .driver         = {
1308                 .name   = "omapdss_dss",
1309                 .pm     = &dss_pm_ops,
1310                 .of_match_table = dss_of_match,
1311                 .suppress_bind_attrs = true,
1312         },
1313 };
1314
1315 int __init dss_init_platform_driver(void)
1316 {
1317         return platform_driver_register(&omap_dsshw_driver);
1318 }
1319
1320 void dss_uninit_platform_driver(void)
1321 {
1322         platform_driver_unregister(&omap_dsshw_driver);
1323 }