drivers/gpu/ipu-v3/ipu-di.c

   1 /*
   2  * Copyright (c) 2010 Sascha Hauer <s.hauer@pengutronix.de>
   3  * Copyright (C) 2005-2009 Freescale Semiconductor, Inc.
   4  *
   5  * This program is free software; you can redistribute it and/or modify it
   6  * under the terms of the GNU General Public License as published by the
   7  * Free Software Foundation; either version 2 of the License, or (at your
   8  * option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
  12  * or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13  * for more details.
  14  */
  15 #include <linux/export.h>
  16 #include <linux/module.h>
  17 #include <linux/types.h>
  18 #include <linux/errno.h>
  19 #include <linux/io.h>
  20 #include <linux/err.h>
  21 #include <linux/platform_device.h>
  22
  23 #include <video/imx-ipu-v3.h>
  24 #include "ipu-prv.h"
  25
  26 struct ipu_di {
  27         void __iomem *base;
  28         int id;
  29         u32 module;
  30         struct clk *clk_di;     /* display input clock */
  31         struct clk *clk_ipu;    /* IPU bus clock */
  32         struct clk *clk_di_pixel; /* resulting pixel clock */
  33         bool inuse;
  34         struct ipu_soc *ipu;
  35 };
  36
  37 static DEFINE_MUTEX(di_mutex);
  38
  39 struct di_sync_config {
  40         int run_count;
  41         int run_src;
  42         int offset_count;
  43         int offset_src;
  44         int repeat_count;
  45         int cnt_clr_src;
  46         int cnt_polarity_gen_en;
  47         int cnt_polarity_clr_src;
  48         int cnt_polarity_trigger_src;
  49         int cnt_up;
  50         int cnt_down;
  51 };
  52
  53 enum di_pins {
  54         DI_PIN11 = 0,
  55         DI_PIN12 = 1,
  56         DI_PIN13 = 2,
  57         DI_PIN14 = 3,
  58         DI_PIN15 = 4,
  59         DI_PIN16 = 5,
  60         DI_PIN17 = 6,
  61         DI_PIN_CS = 7,
  62
  63         DI_PIN_SER_CLK = 0,
  64         DI_PIN_SER_RS = 1,
  65 };
  66
  67 enum di_sync_wave {
  68         DI_SYNC_NONE = 0,
  69         DI_SYNC_CLK = 1,
  70         DI_SYNC_INT_HSYNC = 2,
  71         DI_SYNC_HSYNC = 3,
  72         DI_SYNC_VSYNC = 4,
  73         DI_SYNC_DE = 6,
  74 };
  75
  76 #define SYNC_WAVE 0
  77
  78 #define DI_GENERAL              0x0000
  79 #define DI_BS_CLKGEN0           0x0004
  80 #define DI_BS_CLKGEN1           0x0008
  81 #define DI_SW_GEN0(gen)         (0x000c + 4 * ((gen) - 1))
  82 #define DI_SW_GEN1(gen)         (0x0030 + 4 * ((gen) - 1))
  83 #define DI_STP_REP(gen)         (0x0148 + 4 * (((gen) - 1)/2))
  84 #define DI_SYNC_AS_GEN          0x0054
  85 #define DI_DW_GEN(gen)          (0x0058 + 4 * (gen))
  86 #define DI_DW_SET(gen, set)     (0x0088 + 4 * ((gen) + 0xc * (set)))
  87 #define DI_SER_CONF             0x015c
  88 #define DI_SSC                  0x0160
  89 #define DI_POL                  0x0164
  90 #define DI_AW0                  0x0168
  91 #define DI_AW1                  0x016c
  92 #define DI_SCR_CONF             0x0170
  93 #define DI_STAT                 0x0174
  94
  95 #define DI_SW_GEN0_RUN_COUNT(x)                 ((x) << 19)
  96 #define DI_SW_GEN0_RUN_SRC(x)                   ((x) << 16)
  97 #define DI_SW_GEN0_OFFSET_COUNT(x)              ((x) << 3)
  98 #define DI_SW_GEN0_OFFSET_SRC(x)                ((x) << 0)
  99
 100 #define DI_SW_GEN1_CNT_POL_GEN_EN(x)            ((x) << 29)
 101 #define DI_SW_GEN1_CNT_CLR_SRC(x)               ((x) << 25)
 102 #define DI_SW_GEN1_CNT_POL_TRIGGER_SRC(x)       ((x) << 12)
 103 #define DI_SW_GEN1_CNT_POL_CLR_SRC(x)           ((x) << 9)
 104 #define DI_SW_GEN1_CNT_DOWN(x)                  ((x) << 16)
 105 #define DI_SW_GEN1_CNT_UP(x)                    (x)
 106 #define DI_SW_GEN1_AUTO_RELOAD                  (0x10000000)
 107
 108 #define DI_DW_GEN_ACCESS_SIZE_OFFSET            24
 109 #define DI_DW_GEN_COMPONENT_SIZE_OFFSET         16
 110
 111 #define DI_GEN_POLARITY_1                       (1 << 0)
 112 #define DI_GEN_POLARITY_2                       (1 << 1)
 113 #define DI_GEN_POLARITY_3                       (1 << 2)
 114 #define DI_GEN_POLARITY_4                       (1 << 3)
 115 #define DI_GEN_POLARITY_5                       (1 << 4)
 116 #define DI_GEN_POLARITY_6                       (1 << 5)
 117 #define DI_GEN_POLARITY_7                       (1 << 6)
 118 #define DI_GEN_POLARITY_8                       (1 << 7)
 119 #define DI_GEN_POLARITY_DISP_CLK                (1 << 17)
 120 #define DI_GEN_DI_CLK_EXT                       (1 << 20)
 121 #define DI_GEN_DI_VSYNC_EXT                     (1 << 21)
 122
 123 #define DI_POL_DRDY_DATA_POLARITY               (1 << 7)
 124 #define DI_POL_DRDY_POLARITY_15                 (1 << 4)
 125
 126 #define DI_VSYNC_SEL_OFFSET                     13
 127
 128 static inline u32 ipu_di_read(struct ipu_di *di, unsigned offset)
 129 {
 130         return readl(di->base + offset);
 131 }
 132
 133 static inline void ipu_di_write(struct ipu_di *di, u32 value, unsigned offset)
 134 {
 135         writel(value, di->base + offset);
 136 }
 137
 138 static void ipu_di_data_wave_config(struct ipu_di *di,
 139                                      int wave_gen,
 140                                      int access_size, int component_size)
 141 {
 142         u32 reg;
 143         reg = (access_size << DI_DW_GEN_ACCESS_SIZE_OFFSET) |
 144             (component_size << DI_DW_GEN_COMPONENT_SIZE_OFFSET);
 145         ipu_di_write(di, reg, DI_DW_GEN(wave_gen));
 146 }
 147
 148 static void ipu_di_data_pin_config(struct ipu_di *di, int wave_gen, int di_pin,
 149                 int set, int up, int down)
 150 {
 151         u32 reg;
 152
 153         reg = ipu_di_read(di, DI_DW_GEN(wave_gen));
 154         reg &= ~(0x3 << (di_pin * 2));
 155         reg |= set << (di_pin * 2);
 156         ipu_di_write(di, reg, DI_DW_GEN(wave_gen));
 157
 158         ipu_di_write(di, (down << 16) | up, DI_DW_SET(wave_gen, set));
 159 }
 160
 161 static void ipu_di_sync_config(struct ipu_di *di, struct di_sync_config *config,
 162                 int start, int count)
 163 {
 164         u32 reg;
 165         int i;
 166
 167         for (i = 0; i < count; i++) {
 168                 struct di_sync_config *c = &config[i];
 169                 int wave_gen = start + i + 1;
 170
 171                 if ((c->run_count >= 0x1000) || (c->offset_count >= 0x1000) ||
 172                                 (c->repeat_count >= 0x1000) ||
 173                                 (c->cnt_up >= 0x400) ||
 174                                 (c->cnt_down >= 0x400)) {
 175                         dev_err(di->ipu->dev, "DI%d counters out of range.\n",
 176                                         di->id);
 177                         return;
 178                 }
 179
 180                 reg = DI_SW_GEN0_RUN_COUNT(c->run_count) |
 181                         DI_SW_GEN0_RUN_SRC(c->run_src) |
 182                         DI_SW_GEN0_OFFSET_COUNT(c->offset_count) |
 183                         DI_SW_GEN0_OFFSET_SRC(c->offset_src);
 184                 ipu_di_write(di, reg, DI_SW_GEN0(wave_gen));
 185
 186                 reg = DI_SW_GEN1_CNT_POL_GEN_EN(c->cnt_polarity_gen_en) |
 187                         DI_SW_GEN1_CNT_CLR_SRC(c->cnt_clr_src) |
 188                         DI_SW_GEN1_CNT_POL_TRIGGER_SRC(
 189                                         c->cnt_polarity_trigger_src) |
 190                         DI_SW_GEN1_CNT_POL_CLR_SRC(c->cnt_polarity_clr_src) |
 191                         DI_SW_GEN1_CNT_DOWN(c->cnt_down) |
 192                         DI_SW_GEN1_CNT_UP(c->cnt_up);
 193
 194                 /* Enable auto reload */
 195                 if (c->repeat_count == 0)
 196                         reg |= DI_SW_GEN1_AUTO_RELOAD;
 197
 198                 ipu_di_write(di, reg, DI_SW_GEN1(wave_gen));
 199
 200                 reg = ipu_di_read(di, DI_STP_REP(wave_gen));
 201                 reg &= ~(0xffff << (16 * ((wave_gen - 1) & 0x1)));
 202                 reg |= c->repeat_count << (16 * ((wave_gen - 1) & 0x1));
 203                 ipu_di_write(di, reg, DI_STP_REP(wave_gen));
 204         }
 205 }
 206
 207 static void ipu_di_sync_config_interlaced(struct ipu_di *di,
 208                 struct ipu_di_signal_cfg *sig)
 209 {
 210         u32 h_total = sig->mode.hactive + sig->mode.hsync_len +
 211                 sig->mode.hback_porch + sig->mode.hfront_porch;
 212         u32 v_total = sig->mode.vactive + sig->mode.vsync_len +
 213                 sig->mode.vback_porch + sig->mode.vfront_porch;
 214         u32 reg;
 215         struct di_sync_config cfg[] = {
 216                 {
 217                         .run_count = h_total / 2 - 1,
 218                         .run_src = DI_SYNC_CLK,
 219                 }, {
 220                         .run_count = h_total - 11,
 221                         .run_src = DI_SYNC_CLK,
 222                         .cnt_down = 4,
 223                 }, {
 224                         .run_count = v_total * 2 - 1,
 225                         .run_src = DI_SYNC_INT_HSYNC,
 226                         .offset_count = 1,
 227                         .offset_src = DI_SYNC_INT_HSYNC,
 228                         .cnt_down = 4,
 229                 }, {
 230                         .run_count = v_total / 2 - 1,
 231                         .run_src = DI_SYNC_HSYNC,
 232                         .offset_count = sig->mode.vback_porch,
 233                         .offset_src = DI_SYNC_HSYNC,
 234                         .repeat_count = 2,
 235                         .cnt_clr_src = DI_SYNC_VSYNC,
 236                 }, {
 237                         .run_src = DI_SYNC_HSYNC,
 238                         .repeat_count = sig->mode.vactive / 2,
 239                         .cnt_clr_src = 4,
 240                 }, {
 241                         .run_count = v_total - 1,
 242                         .run_src = DI_SYNC_HSYNC,
 243                 }, {
 244                         .run_count = v_total / 2 - 1,
 245                         .run_src = DI_SYNC_HSYNC,
 246                         .offset_count = 9,
 247                         .offset_src = DI_SYNC_HSYNC,
 248                         .repeat_count = 2,
 249                         .cnt_clr_src = DI_SYNC_VSYNC,
 250                 }, {
 251                         .run_src = DI_SYNC_CLK,
 252                         .offset_count = sig->mode.hback_porch,
 253                         .offset_src = DI_SYNC_CLK,
 254                         .repeat_count = sig->mode.hactive,
 255                         .cnt_clr_src = 5,
 256                 }, {
 257                         .run_count = v_total - 1,
 258                         .run_src = DI_SYNC_INT_HSYNC,
 259                         .offset_count = v_total / 2,
 260                         .offset_src = DI_SYNC_INT_HSYNC,
 261                         .cnt_clr_src = DI_SYNC_HSYNC,
 262                         .cnt_down = 4,
 263                 }
 264         };
 265
 266         ipu_di_sync_config(di, cfg, 0, ARRAY_SIZE(cfg));
 267
 268         /* set gentime select and tag sel */
 269         reg = ipu_di_read(di, DI_SW_GEN1(9));
 270         reg &= 0x1FFFFFFF;
 271         reg |= (3 - 1) << 29 | 0x00008000;
 272         ipu_di_write(di, reg, DI_SW_GEN1(9));
 273
 274         ipu_di_write(di, v_total / 2 - 1, DI_SCR_CONF);
 275 }
 276
 277 static void ipu_di_sync_config_noninterlaced(struct ipu_di *di,
 278                 struct ipu_di_signal_cfg *sig, int div)
 279 {
 280         u32 h_total = sig->mode.hactive + sig->mode.hsync_len +
 281                 sig->mode.hback_porch + sig->mode.hfront_porch;
 282         u32 v_total = sig->mode.vactive + sig->mode.vsync_len +
 283                 sig->mode.vback_porch + sig->mode.vfront_porch;
 284         struct di_sync_config cfg[] = {
 285                 {
 286                         /* 1: INT_HSYNC */
 287                         .run_count = h_total - 1,
 288                         .run_src = DI_SYNC_CLK,
 289                 } , {
 290                         /* PIN2: HSYNC */
 291                         .run_count = h_total - 1,
 292                         .run_src = DI_SYNC_CLK,
 293                         .offset_count = div * sig->v_to_h_sync,
 294                         .offset_src = DI_SYNC_CLK,
 295                         .cnt_polarity_gen_en = 1,
 296                         .cnt_polarity_trigger_src = DI_SYNC_CLK,
 297                         .cnt_down = sig->mode.hsync_len * 2,
 298                 } , {
 299                         /* PIN3: VSYNC */
 300                         .run_count = v_total - 1,
 301                         .run_src = DI_SYNC_INT_HSYNC,
 302                         .cnt_polarity_gen_en = 1,
 303                         .cnt_polarity_trigger_src = DI_SYNC_INT_HSYNC,
 304                         .cnt_down = sig->mode.vsync_len * 2,
 305                 } , {
 306                         /* 4: Line Active */
 307                         .run_src = DI_SYNC_HSYNC,
 308                         .offset_count = sig->mode.vsync_len +
 309                                         sig->mode.vback_porch,
 310                         .offset_src = DI_SYNC_HSYNC,
 311                         .repeat_count = sig->mode.vactive,
 312                         .cnt_clr_src = DI_SYNC_VSYNC,
 313                 } , {
 314                         /* 5: Pixel Active, referenced by DC */
 315                         .run_src = DI_SYNC_CLK,
 316                         .offset_count = sig->mode.hsync_len +
 317                                         sig->mode.hback_porch,
 318                         .offset_src = DI_SYNC_CLK,
 319                         .repeat_count = sig->mode.hactive,
 320                         .cnt_clr_src = 5, /* Line Active */
 321                 } , {
 322                         /* unused */
 323                 } , {
 324                         /* unused */
 325                 } , {
 326                         /* unused */
 327                 } , {
 328                         /* unused */
 329                 },
 330         };
 331         /* can't use #7 and #8 for line active and pixel active counters */
 332         struct di_sync_config cfg_vga[] = {
 333                 {
 334                         /* 1: INT_HSYNC */
 335                         .run_count = h_total - 1,
 336                         .run_src = DI_SYNC_CLK,
 337                 } , {
 338                         /* 2: VSYNC */
 339                         .run_count = v_total - 1,
 340                         .run_src = DI_SYNC_INT_HSYNC,
 341                 } , {
 342                         /* 3: Line Active */
 343                         .run_src = DI_SYNC_INT_HSYNC,
 344                         .offset_count = sig->mode.vsync_len +
 345                                         sig->mode.vback_porch,
 346                         .offset_src = DI_SYNC_INT_HSYNC,
 347                         .repeat_count = sig->mode.vactive,
 348                         .cnt_clr_src = 3 /* VSYNC */,
 349                 } , {
 350                         /* PIN4: HSYNC for VGA via TVEv2 on TQ MBa53 */
 351                         .run_count = h_total - 1,
 352                         .run_src = DI_SYNC_CLK,
 353                         .offset_count = div * sig->v_to_h_sync + 18, /* magic value from Freescale TVE driver */
 354                         .offset_src = DI_SYNC_CLK,
 355                         .cnt_polarity_gen_en = 1,
 356                         .cnt_polarity_trigger_src = DI_SYNC_CLK,
 357                         .cnt_down = sig->mode.hsync_len * 2,
 358                 } , {
 359                         /* 5: Pixel Active signal to DC */
 360                         .run_src = DI_SYNC_CLK,
 361                         .offset_count = sig->mode.hsync_len +
 362                                         sig->mode.hback_porch,
 363                         .offset_src = DI_SYNC_CLK,
 364                         .repeat_count = sig->mode.hactive,
 365                         .cnt_clr_src = 4, /* Line Active */
 366                 } , {
 367                         /* PIN6: VSYNC for VGA via TVEv2 on TQ MBa53 */
 368                         .run_count = v_total - 1,
 369                         .run_src = DI_SYNC_INT_HSYNC,
 370                         .offset_count = 1, /* magic value from Freescale TVE driver */
 371                         .offset_src = DI_SYNC_INT_HSYNC,
 372                         .cnt_polarity_gen_en = 1,
 373                         .cnt_polarity_trigger_src = DI_SYNC_INT_HSYNC,
 374                         .cnt_down = sig->mode.vsync_len * 2,
 375                 } , {
 376                         /* PIN4: HSYNC for VGA via TVEv2 on i.MX53-QSB */
 377                         .run_count = h_total - 1,
 378                         .run_src = DI_SYNC_CLK,
 379                         .offset_count = div * sig->v_to_h_sync + 18, /* magic value from Freescale TVE driver */
 380                         .offset_src = DI_SYNC_CLK,
 381                         .cnt_polarity_gen_en = 1,
 382                         .cnt_polarity_trigger_src = DI_SYNC_CLK,
 383                         .cnt_down = sig->mode.hsync_len * 2,
 384                 } , {
 385                         /* PIN6: VSYNC for VGA via TVEv2 on i.MX53-QSB */
 386                         .run_count = v_total - 1,
 387                         .run_src = DI_SYNC_INT_HSYNC,
 388                         .offset_count = 1, /* magic value from Freescale TVE driver */
 389                         .offset_src = DI_SYNC_INT_HSYNC,
 390                         .cnt_polarity_gen_en = 1,
 391                         .cnt_polarity_trigger_src = DI_SYNC_INT_HSYNC,
 392                         .cnt_down = sig->mode.vsync_len * 2,
 393                 } , {
 394                         /* unused */
 395                 },
 396         };
 397
 398         ipu_di_write(di, v_total - 1, DI_SCR_CONF);
 399         if (sig->hsync_pin == 2 && sig->vsync_pin == 3)
 400                 ipu_di_sync_config(di, cfg, 0, ARRAY_SIZE(cfg));
 401         else
 402                 ipu_di_sync_config(di, cfg_vga, 0, ARRAY_SIZE(cfg_vga));
 403 }
 404
 405 static void ipu_di_config_clock(struct ipu_di *di,
 406         const struct ipu_di_signal_cfg *sig)
 407 {
 408         struct clk *clk;
 409         unsigned clkgen0;
 410         uint32_t val;
 411
 412         if (sig->clkflags & IPU_DI_CLKMODE_EXT) {
 413                 /*
 414                  * CLKMODE_EXT means we must use the DI clock: this is
 415                  * needed for things like LVDS which needs to feed the
 416                  * DI and LDB with the same pixel clock.
 417                  */
 418                 clk = di->clk_di;
 419
 420                 if (sig->clkflags & IPU_DI_CLKMODE_SYNC) {
 421                         /*
 422                          * CLKMODE_SYNC means that we want the DI to be
 423                          * clocked at the same rate as the parent clock.
 424                          * This is needed (eg) for LDB which needs to be
 425                          * fed with the same pixel clock.  We assume that
 426                          * the LDB clock has already been set correctly.
 427                          */
 428                         clkgen0 = 1 << 4;
 429                 } else {
 430                         /*
 431                          * We can use the divider.  We should really have
 432                          * a flag here indicating whether the bridge can
 433                          * cope with a fractional divider or not.  For the
 434                          * time being, let's go for simplicitly and
 435                          * reliability.
 436                          */
 437                         unsigned long in_rate;
 438                         unsigned div;
 439
 440                         clk_set_rate(clk, sig->mode.pixelclock);
 441
 442                         in_rate = clk_get_rate(clk);
 443                         div = DIV_ROUND_CLOSEST(in_rate, sig->mode.pixelclock);
 444                         if (div == 0)
 445                                 div = 1;
 446
 447                         clkgen0 = div << 4;
 448                 }
 449         } else {
 450                 /*
 451                  * For other interfaces, we can arbitarily select between
 452                  * the DI specific clock and the internal IPU clock.  See
 453                  * DI_GENERAL bit 20.  We select the IPU clock if it can
 454                  * give us a clock rate within 1% of the requested frequency,
 455                  * otherwise we use the DI clock.
 456                  */
 457                 unsigned long rate, clkrate;
 458                 unsigned div, error;
 459
 460                 clkrate = clk_get_rate(di->clk_ipu);
 461                 div = DIV_ROUND_CLOSEST(clkrate, sig->mode.pixelclock);
 462                 if (div == 0)
 463                         div = 1;
 464                 rate = clkrate / div;
 465
 466                 error = rate / (sig->mode.pixelclock / 1000);
 467
 468                 dev_dbg(di->ipu->dev, "  IPU clock can give %lu with divider %u, error %d.%u%%\n",
 469                         rate, div, (signed)(error - 1000) / 10, error % 10);
 470
 471                 /* Allow a 1% error */
 472                 if (error < 1010 && error >= 990) {
 473                         clk = di->clk_ipu;
 474
 475                         clkgen0 = div << 4;
 476                 } else {
 477                         unsigned long in_rate;
 478                         unsigned div;
 479
 480                         clk = di->clk_di;
 481
 482                         clk_set_rate(clk, sig->mode.pixelclock);
 483
 484                         in_rate = clk_get_rate(clk);
 485                         div = DIV_ROUND_CLOSEST(in_rate, sig->mode.pixelclock);
 486                         if (div == 0)
 487                                 div = 1;
 488
 489                         clkgen0 = div << 4;
 490                 }
 491         }
 492
 493         di->clk_di_pixel = clk;
 494
 495         /* Set the divider */
 496         ipu_di_write(di, clkgen0, DI_BS_CLKGEN0);
 497
 498         /*
 499          * Set the high/low periods.  Bits 24:16 give us the falling edge,
 500          * and bits 8:0 give the rising edge.  LSB is fraction, and is
 501          * based on the divider above.  We want a 50% duty cycle, so set
 502          * the falling edge to be half the divider.
 503          */
 504         ipu_di_write(di, (clkgen0 >> 4) << 16, DI_BS_CLKGEN1);
 505
 506         /* Finally select the input clock */
 507         val = ipu_di_read(di, DI_GENERAL) & ~DI_GEN_DI_CLK_EXT;
 508         if (clk == di->clk_di)
 509                 val |= DI_GEN_DI_CLK_EXT;
 510         ipu_di_write(di, val, DI_GENERAL);
 511
 512         dev_dbg(di->ipu->dev, "Want %luHz IPU %luHz DI %luHz using %s, %luHz\n",
 513                 sig->mode.pixelclock,
 514                 clk_get_rate(di->clk_ipu),
 515                 clk_get_rate(di->clk_di),
 516                 clk == di->clk_di ? "DI" : "IPU",
 517                 clk_get_rate(di->clk_di_pixel) / (clkgen0 >> 4));
 518 }
 519
 520 /*
 521  * This function is called to adjust a video mode to IPU restrictions.
 522  * It is meant to be called from drm crtc mode_fixup() methods.
 523  */
 524 int ipu_di_adjust_videomode(struct ipu_di *di, struct videomode *mode)
 525 {
 526         u32 diff;
 527
 528         if (mode->vfront_porch >= 2)
 529                 return 0;
 530
 531         diff = 2 - mode->vfront_porch;
 532
 533         if (mode->vback_porch >= diff) {
 534                 mode->vfront_porch = 2;
 535                 mode->vback_porch -= diff;
 536         } else if (mode->vsync_len > diff) {
 537                 mode->vfront_porch = 2;
 538                 mode->vsync_len = mode->vsync_len - diff;
 539         } else {
 540                 dev_warn(di->ipu->dev, "failed to adjust videomode\n");
 541                 return -EINVAL;
 542         }
 543
 544         dev_warn(di->ipu->dev, "videomode adapted for IPU restrictions\n");
 545         return 0;
 546 }
 547 EXPORT_SYMBOL_GPL(ipu_di_adjust_videomode);
 548
 549 int ipu_di_init_sync_panel(struct ipu_di *di, struct ipu_di_signal_cfg *sig)
 550 {
 551         u32 reg;
 552         u32 di_gen, vsync_cnt;
 553         u32 div;
 554
 555         dev_dbg(di->ipu->dev, "disp %d: panel size = %d x %d\n",
 556                 di->id, sig->mode.hactive, sig->mode.vactive);
 557
 558         if ((sig->mode.vsync_len == 0) || (sig->mode.hsync_len == 0))
 559                 return -EINVAL;
 560
 561         dev_dbg(di->ipu->dev, "Clocks: IPU %luHz DI %luHz Needed %luHz\n",
 562                 clk_get_rate(di->clk_ipu),
 563                 clk_get_rate(di->clk_di),
 564                 sig->mode.pixelclock);
 565
 566         mutex_lock(&di_mutex);
 567
 568         ipu_di_config_clock(di, sig);
 569
 570         div = ipu_di_read(di, DI_BS_CLKGEN0) & 0xfff;
 571         div = div / 16;         /* Now divider is integer portion */
 572
 573         /* Setup pixel clock timing */
 574         /* Down time is half of period */
 575         ipu_di_write(di, (div << 16), DI_BS_CLKGEN1);
 576
 577         ipu_di_data_wave_config(di, SYNC_WAVE, div - 1, div - 1);
 578         ipu_di_data_pin_config(di, SYNC_WAVE, DI_PIN15, 3, 0, div * 2);
 579
 580         di_gen = ipu_di_read(di, DI_GENERAL) & DI_GEN_DI_CLK_EXT;
 581         di_gen |= DI_GEN_DI_VSYNC_EXT;
 582
 583         if (sig->mode.flags & DISPLAY_FLAGS_INTERLACED) {
 584                 ipu_di_sync_config_interlaced(di, sig);
 585
 586                 /* set y_sel = 1 */
 587                 di_gen |= 0x10000000;
 588                 di_gen |= DI_GEN_POLARITY_5;
 589                 di_gen |= DI_GEN_POLARITY_8;
 590
 591                 vsync_cnt = 7;
 592
 593                 if (sig->mode.flags & DISPLAY_FLAGS_HSYNC_HIGH)
 594                         di_gen |= DI_GEN_POLARITY_3;
 595                 if (sig->mode.flags & DISPLAY_FLAGS_VSYNC_HIGH)
 596                         di_gen |= DI_GEN_POLARITY_2;
 597         } else {
 598                 ipu_di_sync_config_noninterlaced(di, sig, div);
 599
 600                 vsync_cnt = 3;
 601                 if (di->id == 1)
 602                         /*
 603                          * TODO: change only for TVEv2, parallel display
 604                          * uses pin 2 / 3
 605                          */
 606                         if (!(sig->hsync_pin == 2 && sig->vsync_pin == 3))
 607                                 vsync_cnt = 6;
 608
 609                 if (sig->mode.flags & DISPLAY_FLAGS_HSYNC_HIGH) {
 610                         if (sig->hsync_pin == 2)
 611                                 di_gen |= DI_GEN_POLARITY_2;
 612                         else if (sig->hsync_pin == 4)
 613                                 di_gen |= DI_GEN_POLARITY_4;
 614                         else if (sig->hsync_pin == 7)
 615                                 di_gen |= DI_GEN_POLARITY_7;
 616                 }
 617                 if (sig->mode.flags & DISPLAY_FLAGS_VSYNC_HIGH) {
 618                         if (sig->vsync_pin == 3)
 619                                 di_gen |= DI_GEN_POLARITY_3;
 620                         else if (sig->vsync_pin == 6)
 621                                 di_gen |= DI_GEN_POLARITY_6;
 622                         else if (sig->vsync_pin == 8)
 623                                 di_gen |= DI_GEN_POLARITY_8;
 624                 }
 625         }
 626
 627         if (sig->clk_pol)
 628                 di_gen |= DI_GEN_POLARITY_DISP_CLK;
 629
 630         ipu_di_write(di, di_gen, DI_GENERAL);
 631
 632         ipu_di_write(di, (--vsync_cnt << DI_VSYNC_SEL_OFFSET) | 0x00000002,
 633                      DI_SYNC_AS_GEN);
 634
 635         reg = ipu_di_read(di, DI_POL);
 636         reg &= ~(DI_POL_DRDY_DATA_POLARITY | DI_POL_DRDY_POLARITY_15);
 637
 638         if (sig->enable_pol)
 639                 reg |= DI_POL_DRDY_POLARITY_15;
 640         if (sig->data_pol)
 641                 reg |= DI_POL_DRDY_DATA_POLARITY;
 642
 643         ipu_di_write(di, reg, DI_POL);
 644
 645         mutex_unlock(&di_mutex);
 646
 647         return 0;
 648 }
 649 EXPORT_SYMBOL_GPL(ipu_di_init_sync_panel);
 650
 651 int ipu_di_enable(struct ipu_di *di)
 652 {
 653         int ret;
 654
 655         WARN_ON(IS_ERR(di->clk_di_pixel));
 656
 657         ret = clk_prepare_enable(di->clk_di_pixel);
 658         if (ret)
 659                 return ret;
 660
 661         ipu_module_enable(di->ipu, di->module);
 662
 663         return 0;
 664 }
 665 EXPORT_SYMBOL_GPL(ipu_di_enable);
 666
 667 int ipu_di_disable(struct ipu_di *di)
 668 {
 669         WARN_ON(IS_ERR(di->clk_di_pixel));
 670
 671         ipu_module_disable(di->ipu, di->module);
 672
 673         clk_disable_unprepare(di->clk_di_pixel);
 674
 675         return 0;
 676 }
 677 EXPORT_SYMBOL_GPL(ipu_di_disable);
 678
 679 int ipu_di_get_num(struct ipu_di *di)
 680 {
 681         return di->id;
 682 }
 683 EXPORT_SYMBOL_GPL(ipu_di_get_num);
 684
 685 static DEFINE_MUTEX(ipu_di_lock);
 686
 687 struct ipu_di *ipu_di_get(struct ipu_soc *ipu, int disp)
 688 {
 689         struct ipu_di *di;
 690
 691         if (disp > 1)
 692                 return ERR_PTR(-EINVAL);
 693
 694         di = ipu->di_priv[disp];
 695
 696         mutex_lock(&ipu_di_lock);
 697
 698         if (di->inuse) {
 699                 di = ERR_PTR(-EBUSY);
 700                 goto out;
 701         }
 702
 703         di->inuse = true;
 704 out:
 705         mutex_unlock(&ipu_di_lock);
 706
 707         return di;
 708 }
 709 EXPORT_SYMBOL_GPL(ipu_di_get);
 710
 711 void ipu_di_put(struct ipu_di *di)
 712 {
 713         mutex_lock(&ipu_di_lock);
 714
 715         di->inuse = false;
 716
 717         mutex_unlock(&ipu_di_lock);
 718 }
 719 EXPORT_SYMBOL_GPL(ipu_di_put);
 720
 721 int ipu_di_init(struct ipu_soc *ipu, struct device *dev, int id,
 722                 unsigned long base,
 723                 u32 module, struct clk *clk_ipu)
 724 {
 725         struct ipu_di *di;
 726
 727         if (id > 1)
 728                 return -ENODEV;
 729
 730         di = devm_kzalloc(dev, sizeof(*di), GFP_KERNEL);
 731         if (!di)
 732                 return -ENOMEM;
 733
 734         ipu->di_priv[id] = di;
 735
 736         di->clk_di = devm_clk_get(dev, id ? "di1" : "di0");
 737         if (IS_ERR(di->clk_di))
 738                 return PTR_ERR(di->clk_di);
 739
 740         di->module = module;
 741         di->id = id;
 742         di->clk_ipu = clk_ipu;
 743         di->base = devm_ioremap(dev, base, PAGE_SIZE);
 744         if (!di->base)
 745                 return -ENOMEM;
 746
 747         ipu_di_write(di, 0x10, DI_BS_CLKGEN0);
 748
 749         dev_dbg(dev, "DI%d base: 0x%08lx remapped to %p\n",
 750                         id, base, di->base);
 751         di->inuse = false;
 752         di->ipu = ipu;
 753
 754         return 0;
 755 }
 756
 757 void ipu_di_exit(struct ipu_soc *ipu, int id)
 758 {
 759 }