drivers/video/mxc/ldb.c

   1 /*
   2  * Copyright (C) 2012-2013 Freescale Semiconductor, Inc. All Rights Reserved.
   3  */
   4
   5 /*
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15
  16  * You should have received a copy of the GNU General Public License along
  17  * with this program; if not, write to the Free Software Foundation, Inc.,
  18  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
  19  */
  20
  21 /*!
  22  * @file mxc_ldb.c
  23  *
  24  * @brief This file contains the LDB driver device interface and fops
  25  * functions.
  26  */
  27 #include <linux/types.h>
  28 #include <linux/init.h>
  29 #include <linux/module.h>
  30 #include <linux/platform_device.h>
  31 #include <linux/err.h>
  32 #include <linux/clk.h>
  33 #include <linux/console.h>
  34 #include <linux/io.h>
  35 #include <linux/ipu.h>
  36 #include <linux/mxcfb.h>
  37 #include <linux/regulator/consumer.h>
  38 #include <linux/spinlock.h>
  39 #include <linux/of_device.h>
  40 #include <linux/mod_devicetable.h>
  41 #include <video/of_display_timing.h>
  42 #include <video/of_videomode.h>
  43 #include <video/videomode.h>
  44
  45 #include "mxc_dispdrv.h"
  46
  47 #define DISPDRV_LDB     "ldb"
  48
  49 #define LDB_BGREF_RMODE_MASK            0x00008000
  50 #define LDB_BGREF_RMODE_INT             0x00008000
  51 #define LDB_BGREF_RMODE_EXT             0x0
  52
  53 #define LDB_DI1_VS_POL_MASK             0x00000400
  54 #define LDB_DI1_VS_POL_ACT_LOW          0x00000400
  55 #define LDB_DI1_VS_POL_ACT_HIGH         0x0
  56 #define LDB_DI0_VS_POL_MASK             0x00000200
  57 #define LDB_DI0_VS_POL_ACT_LOW          0x00000200
  58 #define LDB_DI0_VS_POL_ACT_HIGH         0x0
  59
  60 #define LDB_BIT_MAP_CH1_MASK            0x00000100
  61 #define LDB_BIT_MAP_CH1_JEIDA           0x00000100
  62 #define LDB_BIT_MAP_CH1_SPWG            0x0
  63 #define LDB_BIT_MAP_CH0_MASK            0x00000040
  64 #define LDB_BIT_MAP_CH0_JEIDA           0x00000040
  65 #define LDB_BIT_MAP_CH0_SPWG            0x0
  66
  67 #define LDB_DATA_WIDTH_CH1_MASK         0x00000080
  68 #define LDB_DATA_WIDTH_CH1_24           0x00000080
  69 #define LDB_DATA_WIDTH_CH1_18           0x0
  70 #define LDB_DATA_WIDTH_CH0_MASK         0x00000020
  71 #define LDB_DATA_WIDTH_CH0_24           0x00000020
  72 #define LDB_DATA_WIDTH_CH0_18           0x0
  73
  74 #define LDB_CH1_MODE_MASK               0x0000000C
  75 #define LDB_CH1_MODE_EN_TO_DI1          0x0000000C
  76 #define LDB_CH1_MODE_EN_TO_DI0          0x00000004
  77 #define LDB_CH1_MODE_DISABLE            0x0
  78 #define LDB_CH0_MODE_MASK               0x00000003
  79 #define LDB_CH0_MODE_EN_TO_DI1          0x00000003
  80 #define LDB_CH0_MODE_EN_TO_DI0          0x00000001
  81 #define LDB_CH0_MODE_DISABLE            0x0
  82
  83 #define LDB_SPLIT_MODE_EN               0x00000010
  84
  85 enum {
  86         IMX6_LDB,
  87 };
  88
  89 enum {
  90         LDB_IMX6 = 1,
  91 };
  92
  93 struct fsl_mxc_ldb_platform_data {
  94         int devtype;
  95         u32 ext_ref;
  96 #define LDB_SPL_DI0     1
  97 #define LDB_SPL_DI1     2
  98 #define LDB_DUL_DI0     3
  99 #define LDB_DUL_DI1     4
 100 #define LDB_SIN0        5
 101 #define LDB_SIN1        6
 102 #define LDB_SEP0        7
 103 #define LDB_SEP1        8
 104         int mode;
 105         int ipu_id;
 106         int disp_id;
 107
 108         /*only work for separate mode*/
 109         int sec_ipu_id;
 110         int sec_disp_id;
 111 };
 112
 113 struct ldb_data {
 114         struct platform_device *pdev;
 115         struct mxc_dispdrv_handle *disp_ldb;
 116         uint32_t *reg;
 117         uint32_t *control_reg;
 118         uint32_t *gpr3_reg;
 119         uint32_t control_reg_data;
 120         struct regulator *lvds_bg_reg;
 121         int mode;
 122         bool inited;
 123         struct ldb_setting {
 124                 struct clk *di_clk;
 125                 struct clk *ldb_di_clk;
 126                 struct clk *div_3_5_clk;
 127                 struct clk *div_7_clk;
 128                 struct clk *div_sel_clk;
 129                 bool active;
 130                 bool clk_en;
 131                 int ipu;
 132                 int di;
 133                 uint32_t ch_mask;
 134                 uint32_t ch_val;
 135         } setting[2];
 136         struct notifier_block nb;
 137 };
 138
 139 static int g_ldb_mode;
 140
 141 static struct fb_videomode ldb_modedb[] = {
 142         {
 143          "LDB-WXGA", 60, 1280, 800, 14065,
 144          40, 40,
 145          10, 3,
 146          80, 10,
 147          0,
 148          FB_VMODE_NONINTERLACED,
 149          FB_MODE_IS_DETAILED,},
 150         {
 151          "LDB-XGA", 60, 1024, 768, 15385,
 152          220, 40,
 153          21, 7,
 154          60, 10,
 155          0,
 156          FB_VMODE_NONINTERLACED,
 157          FB_MODE_IS_DETAILED,},
 158         {
 159          "LDB-1080P60", 60, 1920, 1080, 7692,
 160          100, 40,
 161          30, 3,
 162          10, 2,
 163          0,
 164          FB_VMODE_NONINTERLACED,
 165          FB_MODE_IS_DETAILED,},
 166 };
 167 static int ldb_modedb_sz = ARRAY_SIZE(ldb_modedb);
 168
 169 static inline int is_imx6_ldb(struct fsl_mxc_ldb_platform_data *plat_data)
 170 {
 171         return (plat_data->devtype == LDB_IMX6);
 172 }
 173
 174 static int bits_per_pixel(int pixel_fmt)
 175 {
 176         switch (pixel_fmt) {
 177         case IPU_PIX_FMT_BGR24:
 178         case IPU_PIX_FMT_RGB24:
 179                 return 24;
 180                 break;
 181         case IPU_PIX_FMT_BGR666:
 182         case IPU_PIX_FMT_RGB666:
 183         case IPU_PIX_FMT_LVDS666:
 184                 return 18;
 185                 break;
 186         default:
 187                 break;
 188         }
 189         return 0;
 190 }
 191
 192 static int valid_mode(int pixel_fmt)
 193 {
 194         return ((pixel_fmt == IPU_PIX_FMT_RGB24) ||
 195                 (pixel_fmt == IPU_PIX_FMT_BGR24) ||
 196                 (pixel_fmt == IPU_PIX_FMT_LVDS666) ||
 197                 (pixel_fmt == IPU_PIX_FMT_RGB666) ||
 198                 (pixel_fmt == IPU_PIX_FMT_BGR666));
 199 }
 200
 201 static int parse_ldb_mode(char *mode)
 202 {
 203         int ldb_mode;
 204
 205         if (!strcmp(mode, "spl0"))
 206                 ldb_mode = LDB_SPL_DI0;
 207         else if (!strcmp(mode, "spl1"))
 208                 ldb_mode = LDB_SPL_DI1;
 209         else if (!strcmp(mode, "dul0"))
 210                 ldb_mode = LDB_DUL_DI0;
 211         else if (!strcmp(mode, "dul1"))
 212                 ldb_mode = LDB_DUL_DI1;
 213         else if (!strcmp(mode, "sin0"))
 214                 ldb_mode = LDB_SIN0;
 215         else if (!strcmp(mode, "sin1"))
 216                 ldb_mode = LDB_SIN1;
 217         else if (!strcmp(mode, "sep0"))
 218                 ldb_mode = LDB_SEP0;
 219         else if (!strcmp(mode, "sep1"))
 220                 ldb_mode = LDB_SEP1;
 221         else
 222                 ldb_mode = -EINVAL;
 223
 224         return ldb_mode;
 225 }
 226
 227 #ifndef MODULE
 228 /*
 229  *    "ldb=spl0/1"       --      split mode on DI0/1
 230  *    "ldb=dul0/1"       --      dual mode on DI0/1
 231  *    "ldb=sin0/1"       --      single mode on LVDS0/1
 232  *    "ldb=sep0/1"       --      separate mode begin from LVDS0/1
 233  *
 234  *    there are two LVDS channels(LVDS0 and LVDS1) which can transfer video
 235  *    datas, there two channels can be used as split/dual/single/separate mode.
 236  *
 237  *    split mode means display data from DI0 or DI1 will send to both channels
 238  *    LVDS0+LVDS1.
 239  *    dual mode means display data from DI0 or DI1 will be duplicated on LVDS0
 240  *    and LVDS1, it said, LVDS0 and LVDS1 has the same content.
 241  *    single mode means only work for DI0/DI1->LVDS0 or DI0/DI1->LVDS1.
 242  *    separate mode means you can make DI0/DI1->LVDS0 and DI0/DI1->LVDS1 work
 243  *    at the same time.
 244  */
 245 static int __init ldb_setup(char *options)
 246 {
 247         g_ldb_mode = parse_ldb_mode(options);
 248         return (g_ldb_mode < 0) ? 0 : 1;
 249 }
 250 __setup("ldb=", ldb_setup);
 251 #endif
 252
 253 static int ldb_get_of_property(struct platform_device *pdev,
 254                                 struct fsl_mxc_ldb_platform_data *plat_data)
 255 {
 256         struct device_node *np = pdev->dev.of_node;
 257         int err;
 258         u32 ipu_id, disp_id;
 259         u32 sec_ipu_id, sec_disp_id;
 260         char *mode;
 261         u32 ext_ref;
 262
 263         err = of_property_read_string(np, "mode", (const char **)&mode);
 264         if (err) {
 265                 dev_err(&pdev->dev, "get of property mode fail\n");
 266                 return err;
 267         }
 268         err = of_property_read_u32(np, "ext_ref", &ext_ref);
 269         if (err) {
 270                 dev_err(&pdev->dev, "get of property ext_ref fail\n");
 271                 return err;
 272         }
 273         err = of_property_read_u32(np, "ipu_id", &ipu_id);
 274         if (err) {
 275                 dev_err(&pdev->dev, "get of property ipu_id fail\n");
 276                 return err;
 277         }
 278         err = of_property_read_u32(np, "disp_id", &disp_id);
 279         if (err) {
 280                 dev_err(&pdev->dev, "get of property disp_id fail\n");
 281                 return err;
 282         }
 283         err = of_property_read_u32(np, "sec_ipu_id", &sec_ipu_id);
 284         if (err) {
 285                 dev_err(&pdev->dev, "get of property sec_ipu_id fail\n");
 286                 return err;
 287         }
 288         err = of_property_read_u32(np, "sec_disp_id", &sec_disp_id);
 289         if (err) {
 290                 dev_err(&pdev->dev, "get of property sec_disp_id fail\n");
 291                 return err;
 292         }
 293
 294         plat_data->mode = parse_ldb_mode(mode);
 295         plat_data->ext_ref = ext_ref;
 296         plat_data->ipu_id = ipu_id;
 297         plat_data->disp_id = disp_id;
 298         plat_data->sec_ipu_id = sec_ipu_id;
 299         plat_data->sec_disp_id = sec_disp_id;
 300
 301         return err;
 302 }
 303
 304 static int find_ldb_setting(struct ldb_data *ldb, struct fb_info *fbi)
 305 {
 306         char *id_di[] = {
 307                  "DISP3 BG",
 308                  "DISP3 BG - DI1",
 309                 };
 310         char id[16];
 311         int i;
 312
 313         for (i = 0; i < ARRAY_SIZE(id_di); i++) {
 314                 if (ldb->setting[i].active) {
 315                         strlcpy(id, id_di[ldb->setting[i].di], sizeof(id));
 316                         id[4] += ldb->setting[i].ipu;
 317                         if (!strcmp(id, fbi->fix.id))
 318                                 return i;
 319                 }
 320         }
 321         return -EINVAL;
 322 }
 323
 324 static int ldb_disp_setup(struct mxc_dispdrv_handle *disp, struct fb_info *fbi)
 325 {
 326         uint32_t reg, val;
 327         uint32_t pixel_clk, rounded_pixel_clk;
 328         struct clk *ldb_clk_parent;
 329         struct ldb_data *ldb = mxc_dispdrv_getdata(disp);
 330         int setting_idx, di;
 331         int ret;
 332
 333         setting_idx = find_ldb_setting(ldb, fbi);
 334         if (setting_idx < 0)
 335                 return setting_idx;
 336
 337         di = ldb->setting[setting_idx].di;
 338
 339         /* restore channel mode setting */
 340         val = readl(ldb->control_reg);
 341         val |= ldb->setting[setting_idx].ch_val;
 342         writel(val, ldb->control_reg);
 343         dev_dbg(&ldb->pdev->dev, "LDB setup, control reg: 0x%08x\n",
 344                         readl(ldb->control_reg));
 345
 346         /* vsync setup */
 347         reg = readl(ldb->control_reg);
 348         if (fbi->var.sync & FB_SYNC_VERT_HIGH_ACT) {
 349                 if (di == 0)
 350                         reg = (reg & ~LDB_DI0_VS_POL_MASK)
 351                                 | LDB_DI0_VS_POL_ACT_HIGH;
 352                 else
 353                         reg = (reg & ~LDB_DI1_VS_POL_MASK)
 354                                 | LDB_DI1_VS_POL_ACT_HIGH;
 355         } else {
 356                 if (di == 0)
 357                         reg = (reg & ~LDB_DI0_VS_POL_MASK)
 358                                 | LDB_DI0_VS_POL_ACT_LOW;
 359                 else
 360                         reg = (reg & ~LDB_DI1_VS_POL_MASK)
 361                                 | LDB_DI1_VS_POL_ACT_LOW;
 362         }
 363         writel(reg, ldb->control_reg);
 364
 365         /* clk setup */
 366         if (ldb->setting[setting_idx].clk_en)
 367                  clk_disable_unprepare(ldb->setting[setting_idx].ldb_di_clk);
 368         pixel_clk = (PICOS2KHZ(fbi->var.pixclock)) * 1000UL;
 369         ldb_clk_parent = clk_get_parent(ldb->setting[setting_idx].ldb_di_clk);
 370         if (IS_ERR(ldb_clk_parent)) {
 371                 dev_err(&ldb->pdev->dev, "get ldb di parent clk fail\n");
 372                 return PTR_ERR(ldb_clk_parent);
 373         }
 374         if ((ldb->mode == LDB_SPL_DI0) || (ldb->mode == LDB_SPL_DI1))
 375                 ret = clk_set_rate(ldb_clk_parent, pixel_clk * 7 / 2);
 376         else
 377                 ret = clk_set_rate(ldb_clk_parent, pixel_clk * 7);
 378         if (ret < 0) {
 379                 dev_err(&ldb->pdev->dev, "set ldb parent clk fail:%d\n", ret);
 380                 return ret;
 381         }
 382         rounded_pixel_clk = clk_round_rate(ldb->setting[setting_idx].ldb_di_clk,
 383                                                 pixel_clk);
 384         dev_dbg(&ldb->pdev->dev, "pixel_clk:%d, rounded_pixel_clk:%d\n",
 385                         pixel_clk, rounded_pixel_clk);
 386         ret = clk_set_rate(ldb->setting[setting_idx].ldb_di_clk,
 387                                 rounded_pixel_clk);
 388         if (ret < 0) {
 389                 dev_err(&ldb->pdev->dev, "set ldb di clk fail:%d\n", ret);
 390                 return ret;
 391         }
 392         ret = clk_prepare_enable(ldb->setting[setting_idx].ldb_di_clk);
 393         if (ret < 0) {
 394                 dev_err(&ldb->pdev->dev, "enable ldb di clk fail:%d\n", ret);
 395                 return ret;
 396         }
 397
 398         if (!ldb->setting[setting_idx].clk_en)
 399                 ldb->setting[setting_idx].clk_en = true;
 400
 401         return 0;
 402 }
 403
 404 int ldb_fb_event(struct notifier_block *nb, unsigned long val, void *v)
 405 {
 406         struct ldb_data *ldb = container_of(nb, struct ldb_data, nb);
 407         struct fb_event *event = v;
 408         struct fb_info *fbi = event->info;
 409         int index;
 410         uint32_t data;
 411
 412         index = find_ldb_setting(ldb, fbi);
 413         if (index < 0)
 414                 return 0;
 415
 416         fbi->mode = (struct fb_videomode *)fb_match_mode(&fbi->var,
 417                         &fbi->modelist);
 418
 419         if (!fbi->mode) {
 420                 dev_warn(&ldb->pdev->dev,
 421                                 "LDB: can not find mode for xres=%d, yres=%d\n",
 422                                 fbi->var.xres, fbi->var.yres);
 423                 if (ldb->setting[index].clk_en) {
 424                         clk_disable(ldb->setting[index].ldb_di_clk);
 425                         ldb->setting[index].clk_en = false;
 426                         data = readl(ldb->control_reg);
 427                         data &= ~ldb->setting[index].ch_mask;
 428                         writel(data, ldb->control_reg);
 429                 }
 430                 return 0;
 431         }
 432
 433         switch (val) {
 434         case FB_EVENT_BLANK:
 435         {
 436                 if (*((int *)event->data) == FB_BLANK_UNBLANK) {
 437                         if (!ldb->setting[index].clk_en) {
 438                                 clk_enable(ldb->setting[index].ldb_di_clk);
 439                                 ldb->setting[index].clk_en = true;
 440                         }
 441                 } else {
 442                         if (ldb->setting[index].clk_en) {
 443                                 clk_disable(ldb->setting[index].ldb_di_clk);
 444                                 ldb->setting[index].clk_en = false;
 445                                 data = readl(ldb->control_reg);
 446                                 data &= ~ldb->setting[index].ch_mask;
 447                                 writel(data, ldb->control_reg);
 448                                 dev_dbg(&ldb->pdev->dev,
 449                                         "LDB blank, control reg: 0x%08x\n",
 450                                                 readl(ldb->control_reg));
 451                         }
 452                 }
 453                 break;
 454         }
 455         case FB_EVENT_SUSPEND:
 456                 if (ldb->setting[index].clk_en) {
 457                         clk_disable(ldb->setting[index].ldb_di_clk);
 458                         ldb->setting[index].clk_en = false;
 459                 }
 460                 break;
 461         default:
 462                 break;
 463         }
 464         return 0;
 465 }
 466
 467 #define LVDS_MUX_CTL_WIDTH      2
 468 #define LVDS_MUX_CTL_MASK       3
 469 #define LVDS0_MUX_CTL_OFFS      6
 470 #define LVDS1_MUX_CTL_OFFS      8
 471 #define LVDS0_MUX_CTL_MASK      (LVDS_MUX_CTL_MASK << 6)
 472 #define LVDS1_MUX_CTL_MASK      (LVDS_MUX_CTL_MASK << 8)
 473 #define ROUTE_IPU_DI(ipu, di)   (((ipu << 1) | di) & LVDS_MUX_CTL_MASK)
 474 static int ldb_ipu_ldb_route(int ipu, int di, struct ldb_data *ldb)
 475 {
 476         uint32_t reg;
 477         int channel;
 478         int shift;
 479         int mode = ldb->mode;
 480
 481         reg = readl(ldb->gpr3_reg);
 482         if (mode < LDB_SIN0) {
 483                 reg &= ~(LVDS0_MUX_CTL_MASK | LVDS1_MUX_CTL_MASK);
 484                 reg |= (ROUTE_IPU_DI(ipu, di) << LVDS0_MUX_CTL_OFFS) |
 485                         (ROUTE_IPU_DI(ipu, di) << LVDS1_MUX_CTL_OFFS);
 486                 dev_dbg(&ldb->pdev->dev,
 487                         "Dual/Split mode both channels route to IPU%d-DI%d\n",
 488                         ipu, di);
 489         } else if ((mode == LDB_SIN0) || (mode == LDB_SIN1)) {
 490                 reg &= ~(LVDS0_MUX_CTL_MASK | LVDS1_MUX_CTL_MASK);
 491                 channel = mode - LDB_SIN0;
 492                 shift = LVDS0_MUX_CTL_OFFS + channel * LVDS_MUX_CTL_WIDTH;
 493                 reg |= ROUTE_IPU_DI(ipu, di) << shift;
 494                 dev_dbg(&ldb->pdev->dev,
 495                         "Single mode channel %d route to IPU%d-DI%d\n",
 496                                 channel, ipu, di);
 497         } else {
 498                 static bool first = true;
 499
 500                 if (first) {
 501                         if (mode == LDB_SEP0) {
 502                                 reg &= ~LVDS0_MUX_CTL_MASK;
 503                                 channel = 0;
 504                         } else {
 505                                 reg &= ~LVDS1_MUX_CTL_MASK;
 506                                 channel = 1;
 507                         }
 508                         first = false;
 509                 } else {
 510                         if (mode == LDB_SEP0) {
 511                                 reg &= ~LVDS1_MUX_CTL_MASK;
 512                                 channel = 1;
 513                         } else {
 514                                 reg &= ~LVDS0_MUX_CTL_MASK;
 515                                 channel = 0;
 516                         }
 517                 }
 518
 519                 shift = LVDS0_MUX_CTL_OFFS + channel * LVDS_MUX_CTL_WIDTH;
 520                 reg |= ROUTE_IPU_DI(ipu, di) << shift;
 521
 522                 dev_dbg(&ldb->pdev->dev,
 523                         "Separate mode channel %d route to IPU%d-DI%d\n",
 524                         channel, ipu, di);
 525         }
 526         writel(reg, ldb->gpr3_reg);
 527
 528         return 0;
 529 }
 530
 531 static int ldb_disp_init(struct mxc_dispdrv_handle *disp,
 532         struct mxc_dispdrv_setting *setting)
 533 {
 534         int ret = 0, i, lvds_channel = 0;
 535         struct ldb_data *ldb = mxc_dispdrv_getdata(disp);
 536         struct fsl_mxc_ldb_platform_data *plat_data = ldb->pdev->dev.platform_data;
 537         struct resource *res;
 538         uint32_t reg, setting_idx;
 539         uint32_t ch_mask = 0, ch_val = 0;
 540         uint32_t ipu_id, disp_id;
 541         char di_clk[] = "ipu1_di0_sel";
 542         char ldb_clk[] = "ldb_di0";
 543         char div_3_5_clk[] = "di0_div_3_5";
 544         char div_7_clk[] = "di0_div_7";
 545         char div_sel_clk[] = "di0_div_sel";
 546
 547         /* if input format not valid, make RGB666 as default*/
 548         if (!valid_mode(setting->if_fmt)) {
 549                 dev_warn(&ldb->pdev->dev, "Input pixel format not valid"
 550                                         " use default RGB666\n");
 551                 setting->if_fmt = IPU_PIX_FMT_RGB666;
 552         }
 553
 554         if (!ldb->inited) {
 555                 setting_idx = 0;
 556                 res = platform_get_resource(ldb->pdev, IORESOURCE_MEM, 0);
 557                 if (!res) {
 558                         dev_err(&ldb->pdev->dev, "get iomem fail.\n");
 559                         return -ENOMEM;
 560                 }
 561
 562                 ldb->reg = devm_ioremap(&ldb->pdev->dev, res->start,
 563                                         resource_size(res));
 564                 ldb->control_reg = ldb->reg + 2;
 565                 ldb->gpr3_reg = ldb->reg + 3;
 566
 567                 /* ipu selected by platform data setting */
 568                 setting->dev_id = plat_data->ipu_id;
 569
 570                 reg = readl(ldb->control_reg);
 571
 572                 /* refrence resistor select */
 573                 reg &= ~LDB_BGREF_RMODE_MASK;
 574                 if (plat_data->ext_ref)
 575                         reg |= LDB_BGREF_RMODE_EXT;
 576                 else
 577                         reg |= LDB_BGREF_RMODE_INT;
 578
 579                 /* TODO: now only use SPWG data mapping for both channel */
 580                 reg &= ~(LDB_BIT_MAP_CH0_MASK | LDB_BIT_MAP_CH1_MASK);
 581                 reg |= LDB_BIT_MAP_CH0_SPWG | LDB_BIT_MAP_CH1_SPWG;
 582
 583                 /* channel mode setting */
 584                 reg &= ~(LDB_CH0_MODE_MASK | LDB_CH1_MODE_MASK);
 585                 reg &= ~(LDB_DATA_WIDTH_CH0_MASK | LDB_DATA_WIDTH_CH1_MASK);
 586
 587                 if (bits_per_pixel(setting->if_fmt) == 24)
 588                         reg |= LDB_DATA_WIDTH_CH0_24 | LDB_DATA_WIDTH_CH1_24;
 589                 else
 590                         reg |= LDB_DATA_WIDTH_CH0_18 | LDB_DATA_WIDTH_CH1_18;
 591
 592                 if (g_ldb_mode >= LDB_SPL_DI0)
 593                         ldb->mode = g_ldb_mode;
 594                 else
 595                         ldb->mode = plat_data->mode;
 596
 597                 if ((ldb->mode == LDB_SIN0) || (ldb->mode == LDB_SIN1)) {
 598                         ret = ldb->mode - LDB_SIN0;
 599                         if (plat_data->disp_id != ret) {
 600                                 dev_warn(&ldb->pdev->dev,
 601                                         "change IPU DI%d to IPU DI%d for LDB "
 602                                         "channel%d.\n",
 603                                         plat_data->disp_id, ret, ret);
 604                                 plat_data->disp_id = ret;
 605                         }
 606                 } else if (((ldb->mode == LDB_SEP0) || (ldb->mode == LDB_SEP1))
 607                                 && is_imx6_ldb(plat_data)) {
 608                         if (plat_data->disp_id == plat_data->sec_disp_id) {
 609                                 dev_err(&ldb->pdev->dev,
 610                                         "For LVDS separate mode,"
 611                                         "two DIs should be different!\n");
 612                                 return -EINVAL;
 613                         }
 614
 615                         if (((!plat_data->disp_id) && (ldb->mode == LDB_SEP1))
 616                                 || ((plat_data->disp_id) &&
 617                                         (ldb->mode == LDB_SEP0))) {
 618                                 dev_dbg(&ldb->pdev->dev,
 619                                         "LVDS separate mode:"
 620                                         "swap DI configuration!\n");
 621                                 ipu_id = plat_data->ipu_id;
 622                                 disp_id = plat_data->disp_id;
 623                                 plat_data->ipu_id = plat_data->sec_ipu_id;
 624                                 plat_data->disp_id = plat_data->sec_disp_id;
 625                                 plat_data->sec_ipu_id = ipu_id;
 626                                 plat_data->sec_disp_id = disp_id;
 627                         }
 628                 }
 629
 630                 if (ldb->mode == LDB_SPL_DI0) {
 631                         reg |= LDB_SPLIT_MODE_EN | LDB_CH0_MODE_EN_TO_DI0
 632                                 | LDB_CH1_MODE_EN_TO_DI0;
 633                         setting->disp_id = 0;
 634                 } else if (ldb->mode == LDB_SPL_DI1) {
 635                         reg |= LDB_SPLIT_MODE_EN | LDB_CH0_MODE_EN_TO_DI1
 636                                 | LDB_CH1_MODE_EN_TO_DI1;
 637                         setting->disp_id = 1;
 638                 } else if (ldb->mode == LDB_DUL_DI0) {
 639                         reg &= ~LDB_SPLIT_MODE_EN;
 640                         reg |= LDB_CH0_MODE_EN_TO_DI0 | LDB_CH1_MODE_EN_TO_DI0;
 641                         setting->disp_id = 0;
 642                 } else if (ldb->mode == LDB_DUL_DI1) {
 643                         reg &= ~LDB_SPLIT_MODE_EN;
 644                         reg |= LDB_CH0_MODE_EN_TO_DI1 | LDB_CH1_MODE_EN_TO_DI1;
 645                         setting->disp_id = 1;
 646                 } else if (ldb->mode == LDB_SIN0) {
 647                         reg &= ~LDB_SPLIT_MODE_EN;
 648                         setting->disp_id = plat_data->disp_id;
 649                         if (setting->disp_id == 0)
 650                                 reg |= LDB_CH0_MODE_EN_TO_DI0;
 651                         else
 652                                 reg |= LDB_CH0_MODE_EN_TO_DI1;
 653                         ch_mask = LDB_CH0_MODE_MASK;
 654                         ch_val = reg & LDB_CH0_MODE_MASK;
 655                 } else if (ldb->mode == LDB_SIN1) {
 656                         reg &= ~LDB_SPLIT_MODE_EN;
 657                         setting->disp_id = plat_data->disp_id;
 658                         if (setting->disp_id == 0)
 659                                 reg |= LDB_CH1_MODE_EN_TO_DI0;
 660                         else
 661                                 reg |= LDB_CH1_MODE_EN_TO_DI1;
 662                         ch_mask = LDB_CH1_MODE_MASK;
 663                         ch_val = reg & LDB_CH1_MODE_MASK;
 664                 } else { /* separate mode*/
 665                         setting->disp_id = plat_data->disp_id;
 666
 667                         /* first output is LVDS0 or LVDS1 */
 668                         if (ldb->mode == LDB_SEP0)
 669                                 lvds_channel = 0;
 670                         else
 671                                 lvds_channel = 1;
 672
 673                         reg &= ~LDB_SPLIT_MODE_EN;
 674
 675                         if ((lvds_channel == 0) && (setting->disp_id == 0))
 676                                 reg |= LDB_CH0_MODE_EN_TO_DI0;
 677                         else if ((lvds_channel == 0) && (setting->disp_id == 1))
 678                                 reg |= LDB_CH0_MODE_EN_TO_DI1;
 679                         else if ((lvds_channel == 1) && (setting->disp_id == 0))
 680                                 reg |= LDB_CH1_MODE_EN_TO_DI0;
 681                         else
 682                                 reg |= LDB_CH1_MODE_EN_TO_DI1;
 683                         ch_mask = lvds_channel ? LDB_CH1_MODE_MASK :
 684                                         LDB_CH0_MODE_MASK;
 685                         ch_val = reg & ch_mask;
 686
 687                         if (bits_per_pixel(setting->if_fmt) == 24) {
 688                                 if (lvds_channel == 0)
 689                                         reg &= ~LDB_DATA_WIDTH_CH1_24;
 690                                 else
 691                                         reg &= ~LDB_DATA_WIDTH_CH0_24;
 692                         } else {
 693                                 if (lvds_channel == 0)
 694                                         reg &= ~LDB_DATA_WIDTH_CH1_18;
 695                                 else
 696                                         reg &= ~LDB_DATA_WIDTH_CH0_18;
 697                         }
 698                 }
 699
 700                 writel(reg, ldb->control_reg);
 701                 if (ldb->mode <  LDB_SIN0) {
 702                         ch_mask = LDB_CH0_MODE_MASK | LDB_CH1_MODE_MASK;
 703                         ch_val = reg & (LDB_CH0_MODE_MASK | LDB_CH1_MODE_MASK);
 704                 }
 705         } else { /* second time for separate mode */
 706                 if ((ldb->mode == LDB_SPL_DI0) ||
 707                         (ldb->mode == LDB_SPL_DI1) ||
 708                         (ldb->mode == LDB_DUL_DI0) ||
 709                         (ldb->mode == LDB_DUL_DI1) ||
 710                         (ldb->mode == LDB_SIN0) ||
 711                         (ldb->mode == LDB_SIN1)) {
 712                         dev_err(&ldb->pdev->dev, "for second ldb disp"
 713                                         "ldb mode should in separate mode\n");
 714                         return -EINVAL;
 715                 }
 716
 717                 setting_idx = 1;
 718                 if (is_imx6_ldb(plat_data)) {
 719                         setting->dev_id = plat_data->sec_ipu_id;
 720                         setting->disp_id = plat_data->sec_disp_id;
 721                 } else {
 722                         setting->dev_id = plat_data->ipu_id;
 723                         setting->disp_id = !plat_data->disp_id;
 724                 }
 725                 if (setting->disp_id == ldb->setting[0].di) {
 726                         dev_err(&ldb->pdev->dev, "Err: for second ldb disp in"
 727                                 "separate mode, DI should be different!\n");
 728                         return -EINVAL;
 729                 }
 730
 731                 /* second output is LVDS0 or LVDS1 */
 732                 if (ldb->mode == LDB_SEP0)
 733                         lvds_channel = 1;
 734                 else
 735                         lvds_channel = 0;
 736
 737                 reg = readl(ldb->control_reg);
 738                 if ((lvds_channel == 0) && (setting->disp_id == 0))
 739                         reg |= LDB_CH0_MODE_EN_TO_DI0;
 740                 else if ((lvds_channel == 0) && (setting->disp_id == 1))
 741                         reg |= LDB_CH0_MODE_EN_TO_DI1;
 742                 else if ((lvds_channel == 1) && (setting->disp_id == 0))
 743                         reg |= LDB_CH1_MODE_EN_TO_DI0;
 744                 else
 745                         reg |= LDB_CH1_MODE_EN_TO_DI1;
 746                 ch_mask = lvds_channel ?  LDB_CH1_MODE_MASK :
 747                                 LDB_CH0_MODE_MASK;
 748                 ch_val = reg & ch_mask;
 749
 750                 if (bits_per_pixel(setting->if_fmt) == 24) {
 751                         if (lvds_channel == 0)
 752                                 reg |= LDB_DATA_WIDTH_CH0_24;
 753                         else
 754                                 reg |= LDB_DATA_WIDTH_CH1_24;
 755                 } else {
 756                         if (lvds_channel == 0)
 757                                 reg |= LDB_DATA_WIDTH_CH0_18;
 758                         else
 759                                 reg |= LDB_DATA_WIDTH_CH1_18;
 760                 }
 761                 writel(reg, ldb->control_reg);
 762         }
 763
 764         /* get clocks */
 765         if (is_imx6_ldb(plat_data) &&
 766                 ((ldb->mode == LDB_SEP0) || (ldb->mode == LDB_SEP1))) {
 767                 ldb_clk[6] += lvds_channel;
 768                 div_3_5_clk[2] += lvds_channel;
 769                 div_7_clk[2] += lvds_channel;
 770                 div_sel_clk[2] += lvds_channel;
 771         } else {
 772                 ldb_clk[6] += setting->disp_id;
 773                 div_3_5_clk[2] += setting->disp_id;
 774                 div_7_clk[2] += setting->disp_id;
 775                 div_sel_clk[2] += setting->disp_id;
 776         }
 777         ldb->setting[setting_idx].ldb_di_clk = clk_get(&ldb->pdev->dev,
 778                                                         ldb_clk);
 779         if (IS_ERR(ldb->setting[setting_idx].ldb_di_clk)) {
 780                 dev_err(&ldb->pdev->dev, "get ldb clk failed\n");
 781                 return PTR_ERR(ldb->setting[setting_idx].ldb_di_clk);
 782         }
 783
 784         ldb->setting[setting_idx].div_3_5_clk = clk_get(&ldb->pdev->dev,
 785                                                         div_3_5_clk);
 786         if (IS_ERR(ldb->setting[setting_idx].div_3_5_clk)) {
 787                 dev_err(&ldb->pdev->dev, "get div 3.5 clk failed\n");
 788                 return PTR_ERR(ldb->setting[setting_idx].div_3_5_clk);
 789         }
 790         ldb->setting[setting_idx].div_7_clk = clk_get(&ldb->pdev->dev,
 791                                                         div_7_clk);
 792         if (IS_ERR(ldb->setting[setting_idx].div_7_clk)) {
 793                 dev_err(&ldb->pdev->dev, "get div 7 clk failed\n");
 794                 return PTR_ERR(ldb->setting[setting_idx].div_7_clk);
 795         }
 796
 797         ldb->setting[setting_idx].div_sel_clk = clk_get(&ldb->pdev->dev,
 798                                                         div_sel_clk);
 799         if (IS_ERR(ldb->setting[setting_idx].div_sel_clk)) {
 800                 dev_err(&ldb->pdev->dev, "get div sel clk failed\n");
 801                 return PTR_ERR(ldb->setting[setting_idx].div_sel_clk);
 802         }
 803
 804         di_clk[3] += setting->dev_id;
 805         di_clk[7] += setting->disp_id;
 806         ldb->setting[setting_idx].di_clk = clk_get(&ldb->pdev->dev,
 807                                                         di_clk);
 808         if (IS_ERR(ldb->setting[setting_idx].di_clk)) {
 809                 dev_err(&ldb->pdev->dev, "get di clk failed\n");
 810                 return PTR_ERR(ldb->setting[setting_idx].di_clk);
 811         }
 812
 813         ldb->setting[setting_idx].ch_mask = ch_mask;
 814         ldb->setting[setting_idx].ch_val = ch_val;
 815
 816         if (is_imx6_ldb(plat_data))
 817                 ldb_ipu_ldb_route(setting->dev_id, setting->disp_id, ldb);
 818
 819         if (setting->fbmode) {
 820                 ldb_modedb[0] = *setting->fbmode;
 821                 ldb_modedb_sz = 1;
 822         }
 823
 824         /* must use spec video mode defined by driver */
 825         ret = fb_find_mode(&setting->fbi->var, setting->fbi, setting->dft_mode_str,
 826                                 ldb_modedb, ldb_modedb_sz, NULL, setting->default_bpp);
 827         if (ret != 1)
 828                 fb_videomode_to_var(&setting->fbi->var, &ldb_modedb[0]);
 829
 830         INIT_LIST_HEAD(&setting->fbi->modelist);
 831         for (i = 0; i < ldb_modedb_sz; i++) {
 832                 struct fb_videomode m;
 833                 fb_var_to_videomode(&m, &setting->fbi->var);
 834                 if (fb_mode_is_equal(&m, &ldb_modedb[i])) {
 835                         fb_add_videomode(&ldb_modedb[i],
 836                                         &setting->fbi->modelist);
 837                         break;
 838                 }
 839         }
 840
 841         ldb->setting[setting_idx].ipu = setting->dev_id;
 842         ldb->setting[setting_idx].di = setting->disp_id;
 843
 844         return ret;
 845 }
 846
 847 static int ldb_post_disp_init(struct mxc_dispdrv_handle *disp,
 848                                 int ipu_id, int disp_id)
 849 {
 850         struct ldb_data *ldb = mxc_dispdrv_getdata(disp);
 851         int setting_idx = ldb->inited ? 1 : 0;
 852         int ret = 0;
 853
 854         if (!ldb->inited) {
 855                 ldb->nb.notifier_call = ldb_fb_event;
 856                 fb_register_client(&ldb->nb);
 857         }
 858
 859         ret = clk_set_parent(ldb->setting[setting_idx].di_clk,
 860                         ldb->setting[setting_idx].ldb_di_clk);
 861         if (ret) {
 862                 dev_err(&ldb->pdev->dev, "fail to set ldb_di clk as"
 863                         "the parent of ipu_di clk\n");
 864                 return ret;
 865         }
 866
 867         if ((ldb->mode == LDB_SPL_DI0) || (ldb->mode == LDB_SPL_DI1)) {
 868                 ret = clk_set_parent(ldb->setting[setting_idx].div_sel_clk,
 869                                 ldb->setting[setting_idx].div_3_5_clk);
 870                 if (ret) {
 871                         dev_err(&ldb->pdev->dev, "fail to set div 3.5 clk as"
 872                                 "the parent of div sel clk\n");
 873                         return ret;
 874                 }
 875         } else {
 876                 ret = clk_set_parent(ldb->setting[setting_idx].div_sel_clk,
 877                                 ldb->setting[setting_idx].div_7_clk);
 878                 if (ret) {
 879                         dev_err(&ldb->pdev->dev, "fail to set div 7 clk as"
 880                                 "the parent of div sel clk\n");
 881                         return ret;
 882                 }
 883         }
 884
 885         /* save active ldb setting for fb notifier */
 886         ldb->setting[setting_idx].active = true;
 887
 888         ldb->inited = true;
 889         return ret;
 890 }
 891
 892 static void ldb_disp_deinit(struct mxc_dispdrv_handle *disp)
 893 {
 894         struct ldb_data *ldb = mxc_dispdrv_getdata(disp);
 895         int i;
 896
 897         writel(0, ldb->control_reg);
 898
 899         for (i = 0; i < 2; i++) {
 900                 clk_disable(ldb->setting[i].ldb_di_clk);
 901                 clk_put(ldb->setting[i].ldb_di_clk);
 902                 clk_put(ldb->setting[i].div_3_5_clk);
 903                 clk_put(ldb->setting[i].div_7_clk);
 904                 clk_put(ldb->setting[i].div_sel_clk);
 905         }
 906
 907         fb_unregister_client(&ldb->nb);
 908 }
 909
 910 static struct mxc_dispdrv_driver ldb_drv = {
 911         .name   = DISPDRV_LDB,
 912         .init   = ldb_disp_init,
 913         .post_init = ldb_post_disp_init,
 914         .deinit = ldb_disp_deinit,
 915         .setup = ldb_disp_setup,
 916 };
 917
 918 static int ldb_suspend(struct platform_device *pdev, pm_message_t state)
 919 {
 920         struct ldb_data *ldb = dev_get_drvdata(&pdev->dev);
 921         uint32_t        data;
 922
 923         if (!ldb->inited)
 924                 return 0;
 925         data = readl(ldb->control_reg);
 926         ldb->control_reg_data = data;
 927         data &= ~(LDB_CH0_MODE_MASK | LDB_CH1_MODE_MASK);
 928         writel(data, ldb->control_reg);
 929
 930         return 0;
 931 }
 932
 933 static int ldb_resume(struct platform_device *pdev)
 934 {
 935         struct ldb_data *ldb = dev_get_drvdata(&pdev->dev);
 936
 937         if (!ldb->inited)
 938                 return 0;
 939         writel(ldb->control_reg_data, ldb->control_reg);
 940
 941         return 0;
 942 }
 943
 944 static struct platform_device_id imx_ldb_devtype[] = {
 945         { "ldb-imx6", LDB_IMX6, },
 946         { /* sentinel */ }
 947 };
 948
 949 static const struct of_device_id imx_ldb_dt_ids[] = {
 950         { .compatible = "fsl,imx6q-ldb", .data = &imx_ldb_devtype[IMX6_LDB],},
 951         { /* sentinel */ }
 952 };
 953
 954 /*!
 955  * This function is called by the driver framework to initialize the LDB
 956  * device.
 957  *
 958  * @param       dev     The device structure for the LDB passed in by the
 959  *                      driver framework.
 960  *
 961  * @return      Returns 0 on success or negative error code on error
 962  */
 963 static int ldb_probe(struct platform_device *pdev)
 964 {
 965         int ret = 0;
 966         struct ldb_data *ldb;
 967         struct fsl_mxc_ldb_platform_data *plat_data;
 968         const struct of_device_id *of_id =
 969                         of_match_device(imx_ldb_dt_ids, &pdev->dev);
 970
 971         dev_dbg(&pdev->dev, "%s enter\n", __func__);
 972         ldb = devm_kzalloc(&pdev->dev, sizeof(struct ldb_data), GFP_KERNEL);
 973         if (!ldb)
 974                 return -ENOMEM;
 975
 976         plat_data = devm_kzalloc(&pdev->dev,
 977                                 sizeof(struct fsl_mxc_ldb_platform_data),
 978                                 GFP_KERNEL);
 979         if (!plat_data)
 980                 return -ENOMEM;
 981         pdev->dev.platform_data = plat_data;
 982         if (of_id)
 983                 pdev->id_entry = of_id->data;
 984         plat_data->devtype = pdev->id_entry->driver_data;
 985
 986         ret = ldb_get_of_property(pdev, plat_data);
 987         if (ret < 0) {
 988                 dev_err(&pdev->dev, "get ldb of property fail\n");
 989                 return ret;
 990         }
 991
 992         ldb->pdev = pdev;
 993         ldb->disp_ldb = mxc_dispdrv_register(&ldb_drv);
 994         mxc_dispdrv_setdata(ldb->disp_ldb, ldb);
 995
 996         dev_set_drvdata(&pdev->dev, ldb);
 997
 998         dev_dbg(&pdev->dev, "%s exit\n", __func__);
 999         return ret;
1000 }
1001
1002 static int ldb_remove(struct platform_device *pdev)
1003 {
1004         struct ldb_data *ldb = dev_get_drvdata(&pdev->dev);
1005
1006         if (!ldb->inited)
1007                 return 0;
1008         mxc_dispdrv_puthandle(ldb->disp_ldb);
1009         mxc_dispdrv_unregister(ldb->disp_ldb);
1010         return 0;
1011 }
1012
1013 static struct platform_driver mxcldb_driver = {
1014         .driver = {
1015                 .name = "mxc_ldb",
1016                 .of_match_table = imx_ldb_dt_ids,
1017         },
1018         .probe = ldb_probe,
1019         .remove = ldb_remove,
1020         .suspend = ldb_suspend,
1021         .resume = ldb_resume,
1022 };
1023
1024 static int __init ldb_init(void)
1025 {
1026         return platform_driver_register(&mxcldb_driver);
1027 }
1028
1029 static void __exit ldb_uninit(void)
1030 {
1031         platform_driver_unregister(&mxcldb_driver);
1032 }
1033
1034 module_init(ldb_init);
1035 module_exit(ldb_uninit);
1036
1037 MODULE_AUTHOR("Freescale Semiconductor, Inc.");
1038 MODULE_DESCRIPTION("MXC LDB driver");
1039 MODULE_LICENSE("GPL");