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  *    data. These two channels can be used as split/dual/single/separate mode.
 236  *
 237  *    split mode means display data from DI0 or DI1 will be sent to both channels
 238  *    LVDS0+LVDS1.
 239  *    dual mode means display data from DI0 or DI1 will be duplicated on LVDS0
 240  *    and LVDS1, i.e. 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 + 1, 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 + 1, 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 + 1, 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 use default RGB666\n");
 550                 setting->if_fmt = IPU_PIX_FMT_RGB666;
 551         }
 552
 553         if (!ldb->inited) {
 554                 setting_idx = 0;
 555                 res = platform_get_resource(ldb->pdev, IORESOURCE_MEM, 0);
 556                 if (!res) {
 557                         dev_err(&ldb->pdev->dev, "get iomem fail.\n");
 558                         return -ENOMEM;
 559                 }
 560
 561                 ldb->reg = devm_ioremap(&ldb->pdev->dev, res->start,
 562                                         resource_size(res));
 563                 ldb->control_reg = ldb->reg + 2;
 564                 ldb->gpr3_reg = ldb->reg + 3;
 565
 566                 /* ipu selected by platform data setting */
 567                 setting->dev_id = plat_data->ipu_id;
 568
 569                 reg = readl(ldb->control_reg);
 570
 571                 /* reference resistor select */
 572                 reg &= ~LDB_BGREF_RMODE_MASK;
 573                 if (plat_data->ext_ref)
 574                         reg |= LDB_BGREF_RMODE_EXT;
 575                 else
 576                         reg |= LDB_BGREF_RMODE_INT;
 577
 578                 /* TODO: now only use SPWG data mapping for both channel */
 579                 reg &= ~(LDB_BIT_MAP_CH0_MASK | LDB_BIT_MAP_CH1_MASK);
 580                 reg |= LDB_BIT_MAP_CH0_SPWG | LDB_BIT_MAP_CH1_SPWG;
 581
 582                 /* channel mode setting */
 583                 reg &= ~(LDB_CH0_MODE_MASK | LDB_CH1_MODE_MASK);
 584                 reg &= ~(LDB_DATA_WIDTH_CH0_MASK | LDB_DATA_WIDTH_CH1_MASK);
 585
 586                 if (bits_per_pixel(setting->if_fmt) == 24)
 587                         reg |= LDB_DATA_WIDTH_CH0_24 | LDB_DATA_WIDTH_CH1_24;
 588                 else
 589                         reg |= LDB_DATA_WIDTH_CH0_18 | LDB_DATA_WIDTH_CH1_18;
 590
 591                 if (g_ldb_mode >= LDB_SPL_DI0)
 592                         ldb->mode = g_ldb_mode;
 593                 else
 594                         ldb->mode = plat_data->mode;
 595
 596                 if ((ldb->mode == LDB_SIN0) || (ldb->mode == LDB_SIN1)) {
 597                         ret = ldb->mode - LDB_SIN0;
 598                         if (plat_data->disp_id != ret) {
 599                                 dev_warn(&ldb->pdev->dev,
 600                                         "change IPU DI%d to IPU DI%d for LDB channel%d.\n",
 601                                         plat_data->disp_id, ret, ret);
 602                                 plat_data->disp_id = ret;
 603                         }
 604                 } else if (((ldb->mode == LDB_SEP0) || (ldb->mode == LDB_SEP1))
 605                                 && is_imx6_ldb(plat_data)) {
 606                         if (plat_data->ipu_id == plat_data->sec_ipu_id &&
 607                                 plat_data->disp_id == plat_data->sec_disp_id) {
 608                                 dev_err(&ldb->pdev->dev,
 609                                         "For LVDS separate mode, two DIs should be different!\n");
 610                                 return -EINVAL;
 611                         }
 612
 613                         if ((!plat_data->disp_id && ldb->mode == LDB_SEP1) ||
 614                                 (plat_data->disp_id && ldb->mode == LDB_SEP0)) {
 615                                 dev_dbg(&ldb->pdev->dev,
 616                                         "LVDS separate mode: swap DI configuration!\n");
 617                                 ipu_id = plat_data->ipu_id;
 618                                 disp_id = plat_data->disp_id;
 619                                 plat_data->ipu_id = plat_data->sec_ipu_id;
 620                                 plat_data->disp_id = plat_data->sec_disp_id;
 621                                 plat_data->sec_ipu_id = ipu_id;
 622                                 plat_data->sec_disp_id = disp_id;
 623                         }
 624                 }
 625
 626                 if (ldb->mode == LDB_SPL_DI0) {
 627                         reg |= LDB_SPLIT_MODE_EN | LDB_CH0_MODE_EN_TO_DI0
 628                                 | LDB_CH1_MODE_EN_TO_DI0;
 629                         setting->disp_id = 0;
 630                 } else if (ldb->mode == LDB_SPL_DI1) {
 631                         reg |= LDB_SPLIT_MODE_EN | LDB_CH0_MODE_EN_TO_DI1
 632                                 | LDB_CH1_MODE_EN_TO_DI1;
 633                         setting->disp_id = 1;
 634                 } else if (ldb->mode == LDB_DUL_DI0) {
 635                         reg &= ~LDB_SPLIT_MODE_EN;
 636                         reg |= LDB_CH0_MODE_EN_TO_DI0 | LDB_CH1_MODE_EN_TO_DI0;
 637                         setting->disp_id = 0;
 638                 } else if (ldb->mode == LDB_DUL_DI1) {
 639                         reg &= ~LDB_SPLIT_MODE_EN;
 640                         reg |= LDB_CH0_MODE_EN_TO_DI1 | LDB_CH1_MODE_EN_TO_DI1;
 641                         setting->disp_id = 1;
 642                 } else if (ldb->mode == LDB_SIN0) {
 643                         reg &= ~LDB_SPLIT_MODE_EN;
 644                         setting->disp_id = plat_data->disp_id;
 645                         if (setting->disp_id == 0)
 646                                 reg |= LDB_CH0_MODE_EN_TO_DI0;
 647                         else
 648                                 reg |= LDB_CH0_MODE_EN_TO_DI1;
 649                         ch_mask = LDB_CH0_MODE_MASK;
 650                         ch_val = reg & LDB_CH0_MODE_MASK;
 651                 } else if (ldb->mode == LDB_SIN1) {
 652                         reg &= ~LDB_SPLIT_MODE_EN;
 653                         setting->disp_id = plat_data->disp_id;
 654                         if (setting->disp_id == 0)
 655                                 reg |= LDB_CH1_MODE_EN_TO_DI0;
 656                         else
 657                                 reg |= LDB_CH1_MODE_EN_TO_DI1;
 658                         ch_mask = LDB_CH1_MODE_MASK;
 659                         ch_val = reg & LDB_CH1_MODE_MASK;
 660                 } else { /* separate mode */
 661                         setting->disp_id = plat_data->disp_id;
 662
 663                         /* first output is LVDS0 or LVDS1 */
 664                         if (ldb->mode == LDB_SEP0)
 665                                 lvds_channel = 0;
 666                         else
 667                                 lvds_channel = 1;
 668
 669                         reg &= ~LDB_SPLIT_MODE_EN;
 670
 671                         if ((lvds_channel == 0) && (setting->disp_id == 0))
 672                                 reg |= LDB_CH0_MODE_EN_TO_DI0;
 673                         else if ((lvds_channel == 0) && (setting->disp_id == 1))
 674                                 reg |= LDB_CH0_MODE_EN_TO_DI1;
 675                         else if ((lvds_channel == 1) && (setting->disp_id == 0))
 676                                 reg |= LDB_CH1_MODE_EN_TO_DI0;
 677                         else
 678                                 reg |= LDB_CH1_MODE_EN_TO_DI1;
 679                         ch_mask = lvds_channel ? LDB_CH1_MODE_MASK :
 680                                         LDB_CH0_MODE_MASK;
 681                         ch_val = reg & ch_mask;
 682
 683                         if (bits_per_pixel(setting->if_fmt) == 24) {
 684                                 if (lvds_channel == 0)
 685                                         reg &= ~LDB_DATA_WIDTH_CH1_24;
 686                                 else
 687                                         reg &= ~LDB_DATA_WIDTH_CH0_24;
 688                         } else {
 689                                 if (lvds_channel == 0)
 690                                         reg &= ~LDB_DATA_WIDTH_CH1_18;
 691                                 else
 692                                         reg &= ~LDB_DATA_WIDTH_CH0_18;
 693                         }
 694                 }
 695
 696                 writel(reg, ldb->control_reg);
 697                 if (ldb->mode <  LDB_SIN0) {
 698                         ch_mask = LDB_CH0_MODE_MASK | LDB_CH1_MODE_MASK;
 699                         ch_val = reg & (LDB_CH0_MODE_MASK | LDB_CH1_MODE_MASK);
 700                 }
 701         } else { /* second time for separate mode */
 702                 if ((ldb->mode == LDB_SPL_DI0) ||
 703                         (ldb->mode == LDB_SPL_DI1) ||
 704                         (ldb->mode == LDB_DUL_DI0) ||
 705                         (ldb->mode == LDB_DUL_DI1) ||
 706                         (ldb->mode == LDB_SIN0) ||
 707                         (ldb->mode == LDB_SIN1)) {
 708                         dev_err(&ldb->pdev->dev, "for second ldb disp ldb mode should be in separate mode\n");
 709                         return -EINVAL;
 710                 }
 711
 712                 setting_idx = 1;
 713                 if (is_imx6_ldb(plat_data)) {
 714                         setting->dev_id = plat_data->sec_ipu_id;
 715                         setting->disp_id = plat_data->sec_disp_id;
 716                 } else {
 717                         setting->dev_id = plat_data->ipu_id;
 718                         setting->disp_id = !plat_data->disp_id;
 719                 }
 720                 if (setting->dev_id == ldb->setting[0].ipu &&
 721                         setting->disp_id == ldb->setting[0].di) {
 722                         dev_err(&ldb->pdev->dev, "Err: for second ldb disp in separate mode, DI should be different!\n");
 723                         return -EINVAL;
 724                 }
 725
 726                 /* second output is LVDS0 or LVDS1 */
 727                 if (ldb->mode == LDB_SEP0)
 728                         lvds_channel = 1;
 729                 else
 730                         lvds_channel = 0;
 731
 732                 reg = readl(ldb->control_reg);
 733                 if ((lvds_channel == 0) && (setting->disp_id == 0))
 734                         reg |= LDB_CH0_MODE_EN_TO_DI0;
 735                 else if ((lvds_channel == 0) && (setting->disp_id == 1))
 736                         reg |= LDB_CH0_MODE_EN_TO_DI1;
 737                 else if ((lvds_channel == 1) && (setting->disp_id == 0))
 738                         reg |= LDB_CH1_MODE_EN_TO_DI0;
 739                 else
 740                         reg |= LDB_CH1_MODE_EN_TO_DI1;
 741                 ch_mask = lvds_channel ?  LDB_CH1_MODE_MASK :
 742                                 LDB_CH0_MODE_MASK;
 743                 ch_val = reg & ch_mask;
 744
 745                 if (bits_per_pixel(setting->if_fmt) == 24) {
 746                         if (lvds_channel == 0)
 747                                 reg |= LDB_DATA_WIDTH_CH0_24;
 748                         else
 749                                 reg |= LDB_DATA_WIDTH_CH1_24;
 750                 } else {
 751                         if (lvds_channel == 0)
 752                                 reg |= LDB_DATA_WIDTH_CH0_18;
 753                         else
 754                                 reg |= LDB_DATA_WIDTH_CH1_18;
 755                 }
 756                 writel(reg, ldb->control_reg);
 757         }
 758
 759         /* get clocks */
 760         if (is_imx6_ldb(plat_data) &&
 761                 ((ldb->mode == LDB_SEP0) || (ldb->mode == LDB_SEP1))) {
 762                 ldb_clk[6] += lvds_channel;
 763                 div_3_5_clk[2] += lvds_channel;
 764                 div_7_clk[2] += lvds_channel;
 765                 div_sel_clk[2] += lvds_channel;
 766         } else {
 767                 ldb_clk[6] += setting->disp_id;
 768                 div_3_5_clk[2] += setting->disp_id;
 769                 div_7_clk[2] += setting->disp_id;
 770                 div_sel_clk[2] += setting->disp_id;
 771         }
 772         ldb->setting[setting_idx].ldb_di_clk = clk_get(&ldb->pdev->dev,
 773                                                         ldb_clk);
 774         if (IS_ERR(ldb->setting[setting_idx].ldb_di_clk)) {
 775                 dev_err(&ldb->pdev->dev, "Failed to get %s clk: %ld\n",
 776                         ldb_clk, PTR_ERR(ldb->setting[setting_idx].ldb_di_clk));
 777                 return PTR_ERR(ldb->setting[setting_idx].ldb_di_clk);
 778         }
 779
 780         ldb->setting[setting_idx].div_3_5_clk = clk_get(&ldb->pdev->dev,
 781                                                         div_3_5_clk);
 782         if (IS_ERR(ldb->setting[setting_idx].div_3_5_clk)) {
 783                 dev_err(&ldb->pdev->dev, "Failed to get %s clk: %ld\n",
 784                         div_3_5_clk, PTR_ERR(ldb->setting[setting_idx].div_3_5_clk));
 785                 return PTR_ERR(ldb->setting[setting_idx].div_3_5_clk);
 786         }
 787         ldb->setting[setting_idx].div_7_clk = clk_get(&ldb->pdev->dev,
 788                                                         div_7_clk);
 789         if (IS_ERR(ldb->setting[setting_idx].div_7_clk)) {
 790                 dev_err(&ldb->pdev->dev, "Failed to get %s clk: %ld\n",
 791                         div_7_clk, PTR_ERR(ldb->setting[setting_idx].div_7_clk));
 792                 return PTR_ERR(ldb->setting[setting_idx].div_7_clk);
 793         }
 794
 795         ldb->setting[setting_idx].div_sel_clk = clk_get(&ldb->pdev->dev,
 796                                                         div_sel_clk);
 797         if (IS_ERR(ldb->setting[setting_idx].div_sel_clk)) {
 798                 dev_err(&ldb->pdev->dev, "Failed to get %s clk: %ld\n",
 799                         div_sel_clk, PTR_ERR(ldb->setting[setting_idx].div_sel_clk));
 800                 return PTR_ERR(ldb->setting[setting_idx].div_sel_clk);
 801         }
 802
 803         di_clk[3] += setting->dev_id;
 804         di_clk[7] += setting->disp_id;
 805         ldb->setting[setting_idx].di_clk = clk_get(&ldb->pdev->dev,
 806                                                         di_clk);
 807         if (IS_ERR(ldb->setting[setting_idx].di_clk)) {
 808                 dev_err(&ldb->pdev->dev, "Failed to get %s clk: %ld\n",
 809                         di_clk, PTR_ERR(ldb->setting[setting_idx].di_clk));
 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 the parent of ipu_di clk\n");
 863                 return ret;
 864         }
 865
 866         if ((ldb->mode == LDB_SPL_DI0) || (ldb->mode == LDB_SPL_DI1)) {
 867                 ret = clk_set_parent(ldb->setting[setting_idx].div_sel_clk,
 868                                 ldb->setting[setting_idx].div_3_5_clk);
 869                 if (ret) {
 870                         dev_err(&ldb->pdev->dev, "fail to set div 3.5 clk as the parent of div sel clk\n");
 871                         return ret;
 872                 }
 873         } else {
 874                 ret = clk_set_parent(ldb->setting[setting_idx].div_sel_clk,
 875                                 ldb->setting[setting_idx].div_7_clk);
 876                 if (ret) {
 877                         dev_err(&ldb->pdev->dev, "fail to set div 7 clk as the parent of div sel clk\n");
 878                         return ret;
 879                 }
 880         }
 881
 882         /* save active ldb setting for fb notifier */
 883         ldb->setting[setting_idx].active = true;
 884
 885         ldb->inited = true;
 886         return ret;
 887 }
 888
 889 static void ldb_disp_deinit(struct mxc_dispdrv_handle *disp)
 890 {
 891         struct ldb_data *ldb = mxc_dispdrv_getdata(disp);
 892         int i;
 893
 894         writel(0, ldb->control_reg);
 895
 896         for (i = 0; i < 2; i++) {
 897                 clk_disable(ldb->setting[i].ldb_di_clk);
 898                 clk_put(ldb->setting[i].ldb_di_clk);
 899                 clk_put(ldb->setting[i].div_3_5_clk);
 900                 clk_put(ldb->setting[i].div_7_clk);
 901                 clk_put(ldb->setting[i].div_sel_clk);
 902         }
 903
 904         fb_unregister_client(&ldb->nb);
 905 }
 906
 907 static struct mxc_dispdrv_driver ldb_drv = {
 908         .name   = DISPDRV_LDB,
 909         .init   = ldb_disp_init,
 910         .post_init = ldb_post_disp_init,
 911         .deinit = ldb_disp_deinit,
 912         .setup = ldb_disp_setup,
 913 };
 914
 915 static int ldb_suspend(struct platform_device *pdev, pm_message_t state)
 916 {
 917         struct ldb_data *ldb = dev_get_drvdata(&pdev->dev);
 918         uint32_t        data;
 919
 920         if (!ldb->inited)
 921                 return 0;
 922         data = readl(ldb->control_reg);
 923         ldb->control_reg_data = data;
 924         data &= ~(LDB_CH0_MODE_MASK | LDB_CH1_MODE_MASK);
 925         writel(data, ldb->control_reg);
 926
 927         return 0;
 928 }
 929
 930 static int ldb_resume(struct platform_device *pdev)
 931 {
 932         struct ldb_data *ldb = dev_get_drvdata(&pdev->dev);
 933
 934         if (!ldb->inited)
 935                 return 0;
 936         writel(ldb->control_reg_data, ldb->control_reg);
 937
 938         return 0;
 939 }
 940
 941 static struct platform_device_id imx_ldb_devtype[] = {
 942         { "ldb-imx6", LDB_IMX6, },
 943         { /* sentinel */ }
 944 };
 945
 946 static const struct of_device_id imx_ldb_dt_ids[] = {
 947         { .compatible = "fsl,imx6q-ldb", .data = &imx_ldb_devtype[IMX6_LDB],},
 948         { /* sentinel */ }
 949 };
 950
 951 /*!
 952  * This function is called by the driver framework to initialize the LDB
 953  * device.
 954  *
 955  * @param       dev     The device structure for the LDB passed in by the
 956  *                      driver framework.
 957  *
 958  * @return      Returns 0 on success or negative error code on error
 959  */
 960 static int ldb_probe(struct platform_device *pdev)
 961 {
 962         int ret = 0;
 963         struct ldb_data *ldb;
 964         struct fsl_mxc_ldb_platform_data *plat_data;
 965         const struct of_device_id *of_id =
 966                         of_match_device(imx_ldb_dt_ids, &pdev->dev);
 967
 968         dev_dbg(&pdev->dev, "%s enter\n", __func__);
 969         ldb = devm_kzalloc(&pdev->dev, sizeof(struct ldb_data), GFP_KERNEL);
 970         if (!ldb)
 971                 return -ENOMEM;
 972
 973         plat_data = devm_kzalloc(&pdev->dev,
 974                                 sizeof(struct fsl_mxc_ldb_platform_data),
 975                                 GFP_KERNEL);
 976         if (!plat_data)
 977                 return -ENOMEM;
 978         pdev->dev.platform_data = plat_data;
 979         if (of_id)
 980                 pdev->id_entry = of_id->data;
 981         plat_data->devtype = pdev->id_entry->driver_data;
 982
 983         ret = ldb_get_of_property(pdev, plat_data);
 984         if (ret < 0) {
 985                 dev_err(&pdev->dev, "get ldb of property fail\n");
 986                 return ret;
 987         }
 988
 989         ldb->pdev = pdev;
 990         ldb->disp_ldb = mxc_dispdrv_register(&ldb_drv);
 991         mxc_dispdrv_setdata(ldb->disp_ldb, ldb);
 992
 993         dev_set_drvdata(&pdev->dev, ldb);
 994
 995         dev_dbg(&pdev->dev, "%s exit\n", __func__);
 996         return ret;
 997 }
 998
 999 static int ldb_remove(struct platform_device *pdev)
1000 {
1001         struct ldb_data *ldb = dev_get_drvdata(&pdev->dev);
1002
1003         if (!ldb->inited)
1004                 return 0;
1005         mxc_dispdrv_puthandle(ldb->disp_ldb);
1006         mxc_dispdrv_unregister(ldb->disp_ldb);
1007         return 0;
1008 }
1009
1010 static struct platform_driver mxcldb_driver = {
1011         .driver = {
1012                 .name = "mxc_ldb",
1013                 .of_match_table = imx_ldb_dt_ids,
1014         },
1015         .probe = ldb_probe,
1016         .remove = ldb_remove,
1017         .suspend = ldb_suspend,
1018         .resume = ldb_resume,
1019 };
1020
1021 static int __init ldb_init(void)
1022 {
1023         return platform_driver_register(&mxcldb_driver);
1024 }
1025
1026 static void __exit ldb_uninit(void)
1027 {
1028         platform_driver_unregister(&mxcldb_driver);
1029 }
1030
1031 module_init(ldb_init);
1032 module_exit(ldb_uninit);
1033
1034 MODULE_AUTHOR("Freescale Semiconductor, Inc.");
1035 MODULE_DESCRIPTION("MXC LDB driver");
1036 MODULE_LICENSE("GPL");