drivers/video/fsl-diu-fb.c

   1 /*
   2  * Copyright 2008 Freescale Semiconductor, Inc. All Rights Reserved.
   3  *
   4  *  Freescale DIU Frame Buffer device driver
   5  *
   6  *  Authors: Hongjun Chen <hong-jun.chen@freescale.com>
   7  *           Paul Widmer <paul.widmer@freescale.com>
   8  *           Srikanth Srinivasan <srikanth.srinivasan@freescale.com>
   9  *           York Sun <yorksun@freescale.com>
  10  *
  11  *   Based on imxfb.c Copyright (C) 2004 S.Hauer, Pengutronix
  12  *
  13  * This program is free software; you can redistribute  it and/or modify it
  14  * under  the terms of  the GNU General  Public License as published by the
  15  * Free Software Foundation;  either version 2 of the  License, or (at your
  16  * option) any later version.
  17  *
  18  */
  19
  20 #include <linux/module.h>
  21 #include <linux/kernel.h>
  22 #include <linux/errno.h>
  23 #include <linux/string.h>
  24 #include <linux/slab.h>
  25 #include <linux/fb.h>
  26 #include <linux/init.h>
  27 #include <linux/dma-mapping.h>
  28 #include <linux/platform_device.h>
  29 #include <linux/interrupt.h>
  30 #include <linux/clk.h>
  31 #include <linux/uaccess.h>
  32 #include <linux/vmalloc.h>
  33 #include <linux/spinlock.h>
  34
  35 #include <sysdev/fsl_soc.h>
  36 #include <linux/fsl-diu-fb.h>
  37 #include "edid.h"
  38
  39 #define FSL_AOI_NUM     6       /* 5 AOIs and one dummy AOI */
  40                                 /* 1 for plane 0, 2 for plane 1&2 each */
  41
  42 /* HW cursor parameters */
  43 #define MAX_CURS                32
  44
  45 /* INT_STATUS/INT_MASK field descriptions */
  46 #define INT_VSYNC       0x01    /* Vsync interrupt  */
  47 #define INT_VSYNC_WB    0x02    /* Vsync interrupt for write back operation */
  48 #define INT_UNDRUN      0x04    /* Under run exception interrupt */
  49 #define INT_PARERR      0x08    /* Display parameters error interrupt */
  50 #define INT_LS_BF_VS    0x10    /* Lines before vsync. interrupt */
  51
  52 struct diu_addr {
  53         void *vaddr;            /* Virtual address */
  54         dma_addr_t paddr;       /* Physical address */
  55         __u32 offset;
  56 };
  57
  58 /*
  59  * List of supported video modes
  60  *
  61  * The first entry is the default video mode.  The remain entries are in
  62  * order if increasing resolution and frequency.  The 320x240-60 mode is
  63  * the initial AOI for the second and third planes.
  64  */
  65 static struct fb_videomode __devinitdata fsl_diu_mode_db[] = {
  66         {
  67                 .refresh        = 60,
  68                 .xres           = 1024,
  69                 .yres           = 768,
  70                 .pixclock       = 15385,
  71                 .left_margin    = 160,
  72                 .right_margin   = 24,
  73                 .upper_margin   = 29,
  74                 .lower_margin   = 3,
  75                 .hsync_len      = 136,
  76                 .vsync_len      = 6,
  77                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  78                 .vmode          = FB_VMODE_NONINTERLACED
  79         },
  80         {
  81                 .refresh        = 60,
  82                 .xres           = 320,
  83                 .yres           = 240,
  84                 .pixclock       = 79440,
  85                 .left_margin    = 16,
  86                 .right_margin   = 16,
  87                 .upper_margin   = 16,
  88                 .lower_margin   = 5,
  89                 .hsync_len      = 48,
  90                 .vsync_len      = 1,
  91                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
  92                 .vmode          = FB_VMODE_NONINTERLACED
  93         },
  94         {
  95                 .refresh        = 60,
  96                 .xres           = 640,
  97                 .yres           = 480,
  98                 .pixclock       = 39722,
  99                 .left_margin    = 48,
 100                 .right_margin   = 16,
 101                 .upper_margin   = 33,
 102                 .lower_margin   = 10,
 103                 .hsync_len      = 96,
 104                 .vsync_len      = 2,
 105                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 106                 .vmode          = FB_VMODE_NONINTERLACED
 107         },
 108         {
 109                 .refresh        = 72,
 110                 .xres           = 640,
 111                 .yres           = 480,
 112                 .pixclock       = 32052,
 113                 .left_margin    = 128,
 114                 .right_margin   = 24,
 115                 .upper_margin   = 28,
 116                 .lower_margin   = 9,
 117                 .hsync_len      = 40,
 118                 .vsync_len      = 3,
 119                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 120                 .vmode          = FB_VMODE_NONINTERLACED
 121         },
 122         {
 123                 .refresh        = 75,
 124                 .xres           = 640,
 125                 .yres           = 480,
 126                 .pixclock       = 31747,
 127                 .left_margin    = 120,
 128                 .right_margin   = 16,
 129                 .upper_margin   = 16,
 130                 .lower_margin   = 1,
 131                 .hsync_len      = 64,
 132                 .vsync_len      = 3,
 133                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 134                 .vmode          = FB_VMODE_NONINTERLACED
 135         },
 136         {
 137                 .refresh        = 90,
 138                 .xres           = 640,
 139                 .yres           = 480,
 140                 .pixclock       = 25057,
 141                 .left_margin    = 120,
 142                 .right_margin   = 32,
 143                 .upper_margin   = 14,
 144                 .lower_margin   = 25,
 145                 .hsync_len      = 40,
 146                 .vsync_len      = 14,
 147                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 148                 .vmode          = FB_VMODE_NONINTERLACED
 149         },
 150         {
 151                 .refresh        = 100,
 152                 .xres           = 640,
 153                 .yres           = 480,
 154                 .pixclock       = 22272,
 155                 .left_margin    = 48,
 156                 .right_margin   = 32,
 157                 .upper_margin   = 17,
 158                 .lower_margin   = 22,
 159                 .hsync_len      = 128,
 160                 .vsync_len      = 12,
 161                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 162                 .vmode          = FB_VMODE_NONINTERLACED
 163         },
 164         {
 165                 .refresh        = 60,
 166                 .xres           = 800,
 167                 .yres           = 480,
 168                 .pixclock       = 33805,
 169                 .left_margin    = 96,
 170                 .right_margin   = 24,
 171                 .upper_margin   = 10,
 172                 .lower_margin   = 3,
 173                 .hsync_len      = 72,
 174                 .vsync_len      = 7,
 175                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 176                 .vmode          = FB_VMODE_NONINTERLACED
 177         },
 178         {
 179                 .refresh        = 60,
 180                 .xres           = 800,
 181                 .yres           = 600,
 182                 .pixclock       = 25000,
 183                 .left_margin    = 88,
 184                 .right_margin   = 40,
 185                 .upper_margin   = 23,
 186                 .lower_margin   = 1,
 187                 .hsync_len      = 128,
 188                 .vsync_len      = 4,
 189                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 190                 .vmode          = FB_VMODE_NONINTERLACED
 191         },
 192         {
 193                 .refresh        = 60,
 194                 .xres           = 854,
 195                 .yres           = 480,
 196                 .pixclock       = 31518,
 197                 .left_margin    = 104,
 198                 .right_margin   = 16,
 199                 .upper_margin   = 13,
 200                 .lower_margin   = 1,
 201                 .hsync_len      = 88,
 202                 .vsync_len      = 3,
 203                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 204                 .vmode          = FB_VMODE_NONINTERLACED
 205         },
 206         {
 207                 .refresh        = 70,
 208                 .xres           = 1024,
 209                 .yres           = 768,
 210                 .pixclock       = 16886,
 211                 .left_margin    = 3,
 212                 .right_margin   = 3,
 213                 .upper_margin   = 2,
 214                 .lower_margin   = 2,
 215                 .hsync_len      = 40,
 216                 .vsync_len      = 18,
 217                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 218                 .vmode          = FB_VMODE_NONINTERLACED
 219         },
 220         {
 221                 .refresh        = 75,
 222                 .xres           = 1024,
 223                 .yres           = 768,
 224                 .pixclock       = 15009,
 225                 .left_margin    = 3,
 226                 .right_margin   = 3,
 227                 .upper_margin   = 2,
 228                 .lower_margin   = 2,
 229                 .hsync_len      = 80,
 230                 .vsync_len      = 32,
 231                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 232                 .vmode          = FB_VMODE_NONINTERLACED
 233         },
 234         {
 235                 .refresh        = 60,
 236                 .xres           = 1280,
 237                 .yres           = 480,
 238                 .pixclock       = 18939,
 239                 .left_margin    = 353,
 240                 .right_margin   = 47,
 241                 .upper_margin   = 39,
 242                 .lower_margin   = 4,
 243                 .hsync_len      = 8,
 244                 .vsync_len      = 2,
 245                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 246                 .vmode          = FB_VMODE_NONINTERLACED
 247         },
 248         {
 249                 .refresh        = 60,
 250                 .xres           = 1280,
 251                 .yres           = 720,
 252                 .pixclock       = 13426,
 253                 .left_margin    = 192,
 254                 .right_margin   = 64,
 255                 .upper_margin   = 22,
 256                 .lower_margin   = 1,
 257                 .hsync_len      = 136,
 258                 .vsync_len      = 3,
 259                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 260                 .vmode          = FB_VMODE_NONINTERLACED
 261         },
 262         {
 263                 .refresh        = 60,
 264                 .xres           = 1280,
 265                 .yres           = 1024,
 266                 .pixclock       = 9375,
 267                 .left_margin    = 38,
 268                 .right_margin   = 128,
 269                 .upper_margin   = 2,
 270                 .lower_margin   = 7,
 271                 .hsync_len      = 216,
 272                 .vsync_len      = 37,
 273                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 274                 .vmode          = FB_VMODE_NONINTERLACED
 275         },
 276         {
 277                 .refresh        = 70,
 278                 .xres           = 1280,
 279                 .yres           = 1024,
 280                 .pixclock       = 9380,
 281                 .left_margin    = 6,
 282                 .right_margin   = 6,
 283                 .upper_margin   = 4,
 284                 .lower_margin   = 4,
 285                 .hsync_len      = 60,
 286                 .vsync_len      = 94,
 287                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 288                 .vmode          = FB_VMODE_NONINTERLACED
 289         },
 290         {
 291                 .refresh        = 75,
 292                 .xres           = 1280,
 293                 .yres           = 1024,
 294                 .pixclock       = 9380,
 295                 .left_margin    = 6,
 296                 .right_margin   = 6,
 297                 .upper_margin   = 4,
 298                 .lower_margin   = 4,
 299                 .hsync_len      = 60,
 300                 .vsync_len      = 15,
 301                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 302                 .vmode          = FB_VMODE_NONINTERLACED
 303         },
 304         {
 305                 .refresh        = 60,
 306                 .xres           = 1920,
 307                 .yres           = 1080,
 308                 .pixclock       = 5787,
 309                 .left_margin    = 328,
 310                 .right_margin   = 120,
 311                 .upper_margin   = 34,
 312                 .lower_margin   = 1,
 313                 .hsync_len      = 208,
 314                 .vsync_len      = 3,
 315                 .sync           = FB_SYNC_COMP_HIGH_ACT | FB_SYNC_VERT_HIGH_ACT,
 316                 .vmode          = FB_VMODE_NONINTERLACED
 317         },
 318 };
 319
 320 static char *fb_mode;
 321 static unsigned long default_bpp = 32;
 322 static enum fsl_diu_monitor_port monitor_port;
 323 static char *monitor_string;
 324
 325 #if defined(CONFIG_NOT_COHERENT_CACHE)
 326 static u8 *coherence_data;
 327 static size_t coherence_data_size;
 328 static unsigned int d_cache_line_size;
 329 #endif
 330
 331 static DEFINE_SPINLOCK(diu_lock);
 332
 333 struct fsl_diu_data {
 334         struct fb_info *fsl_diu_info[FSL_AOI_NUM - 1];
 335                                 /*FSL_AOI_NUM has one dummy AOI */
 336         struct device_attribute dev_attr;
 337         struct diu_ad *dummy_ad;
 338         void *dummy_aoi_virt;
 339         unsigned int irq;
 340         int fb_enabled;
 341         enum fsl_diu_monitor_port monitor_port;
 342         struct diu __iomem *diu_reg;
 343         spinlock_t reg_lock;
 344         struct diu_addr ad;
 345         struct diu_addr gamma;
 346         struct diu_addr pallete;
 347         struct diu_addr cursor;
 348 };
 349
 350 enum mfb_index {
 351         PLANE0 = 0,     /* Plane 0, only one AOI that fills the screen */
 352         PLANE1_AOI0,    /* Plane 1, first AOI */
 353         PLANE1_AOI1,    /* Plane 1, second AOI */
 354         PLANE2_AOI0,    /* Plane 2, first AOI */
 355         PLANE2_AOI1,    /* Plane 2, second AOI */
 356 };
 357
 358 struct mfb_info {
 359         enum mfb_index index;
 360         char *id;
 361         int registered;
 362         unsigned long pseudo_palette[16];
 363         struct diu_ad *ad;
 364         int cursor_reset;
 365         unsigned char g_alpha;
 366         unsigned int count;
 367         int x_aoi_d;            /* aoi display x offset to physical screen */
 368         int y_aoi_d;            /* aoi display y offset to physical screen */
 369         struct fsl_diu_data *parent;
 370         u8 *edid_data;
 371 };
 372
 373
 374 static struct mfb_info mfb_template[] = {
 375         {
 376                 .index = PLANE0,
 377                 .id = "Panel0",
 378                 .registered = 0,
 379                 .count = 0,
 380                 .x_aoi_d = 0,
 381                 .y_aoi_d = 0,
 382         },
 383         {
 384                 .index = PLANE1_AOI0,
 385                 .id = "Panel1 AOI0",
 386                 .registered = 0,
 387                 .g_alpha = 0xff,
 388                 .count = 0,
 389                 .x_aoi_d = 0,
 390                 .y_aoi_d = 0,
 391         },
 392         {
 393                 .index = PLANE1_AOI1,
 394                 .id = "Panel1 AOI1",
 395                 .registered = 0,
 396                 .g_alpha = 0xff,
 397                 .count = 0,
 398                 .x_aoi_d = 0,
 399                 .y_aoi_d = 480,
 400         },
 401         {
 402                 .index = PLANE2_AOI0,
 403                 .id = "Panel2 AOI0",
 404                 .registered = 0,
 405                 .g_alpha = 0xff,
 406                 .count = 0,
 407                 .x_aoi_d = 640,
 408                 .y_aoi_d = 0,
 409         },
 410         {
 411                 .index = PLANE2_AOI1,
 412                 .id = "Panel2 AOI1",
 413                 .registered = 0,
 414                 .g_alpha = 0xff,
 415                 .count = 0,
 416                 .x_aoi_d = 640,
 417                 .y_aoi_d = 480,
 418         },
 419 };
 420
 421 /**
 422  * fsl_diu_name_to_port - convert a port name to a monitor port enum
 423  *
 424  * Takes the name of a monitor port ("dvi", "lvds", or "dlvds") and returns
 425  * the enum fsl_diu_monitor_port that corresponds to that string.
 426  *
 427  * For compatibility with older versions, a number ("0", "1", or "2") is also
 428  * supported.
 429  *
 430  * If the string is unknown, DVI is assumed.
 431  *
 432  * If the particular port is not supported by the platform, another port
 433  * (platform-specific) is chosen instead.
 434  */
 435 static enum fsl_diu_monitor_port fsl_diu_name_to_port(const char *s)
 436 {
 437         enum fsl_diu_monitor_port port = FSL_DIU_PORT_DVI;
 438         unsigned long val;
 439
 440         if (s) {
 441                 if (!strict_strtoul(s, 10, &val) && (val <= 2))
 442                         port = (enum fsl_diu_monitor_port) val;
 443                 else if (strncmp(s, "lvds", 4) == 0)
 444                         port = FSL_DIU_PORT_LVDS;
 445                 else if (strncmp(s, "dlvds", 5) == 0)
 446                         port = FSL_DIU_PORT_DLVDS;
 447         }
 448
 449         return diu_ops.valid_monitor_port(port);
 450 }
 451
 452 /**
 453  * fsl_diu_alloc - allocate memory for the DIU
 454  * @size: number of bytes to allocate
 455  * @param: returned physical address of memory
 456  *
 457  * This function allocates a physically-contiguous block of memory.
 458  */
 459 static void *fsl_diu_alloc(size_t size, phys_addr_t *phys)
 460 {
 461         void *virt;
 462
 463         virt = alloc_pages_exact(size, GFP_DMA | __GFP_ZERO);
 464         if (virt)
 465                 *phys = virt_to_phys(virt);
 466
 467         return virt;
 468 }
 469
 470 /**
 471  * fsl_diu_free - release DIU memory
 472  * @virt: pointer returned by fsl_diu_alloc()
 473  * @size: number of bytes allocated by fsl_diu_alloc()
 474  *
 475  * This function releases memory allocated by fsl_diu_alloc().
 476  */
 477 static void fsl_diu_free(void *virt, size_t size)
 478 {
 479         if (virt && size)
 480                 free_pages_exact(virt, size);
 481 }
 482
 483 /*
 484  * Workaround for failed writing desc register of planes.
 485  * Needed with MPC5121 DIU rev 2.0 silicon.
 486  */
 487 void wr_reg_wa(u32 *reg, u32 val)
 488 {
 489         do {
 490                 out_be32(reg, val);
 491         } while (in_be32(reg) != val);
 492 }
 493
 494 static void fsl_diu_enable_panel(struct fb_info *info)
 495 {
 496         struct mfb_info *pmfbi, *cmfbi, *mfbi = info->par;
 497         struct diu_ad *ad = mfbi->ad;
 498         struct fsl_diu_data *machine_data = mfbi->parent;
 499         struct diu __iomem *hw = machine_data->diu_reg;
 500
 501         switch (mfbi->index) {
 502         case PLANE0:
 503                 if (hw->desc[0] != ad->paddr)
 504                         wr_reg_wa(&hw->desc[0], ad->paddr);
 505                 break;
 506         case PLANE1_AOI0:
 507                 cmfbi = machine_data->fsl_diu_info[2]->par;
 508                 if (hw->desc[1] != ad->paddr) { /* AOI0 closed */
 509                         if (cmfbi->count > 0)   /* AOI1 open */
 510                                 ad->next_ad =
 511                                         cpu_to_le32(cmfbi->ad->paddr);
 512                         else
 513                                 ad->next_ad = 0;
 514                         wr_reg_wa(&hw->desc[1], ad->paddr);
 515                 }
 516                 break;
 517         case PLANE2_AOI0:
 518                 cmfbi = machine_data->fsl_diu_info[4]->par;
 519                 if (hw->desc[2] != ad->paddr) { /* AOI0 closed */
 520                         if (cmfbi->count > 0)   /* AOI1 open */
 521                                 ad->next_ad =
 522                                         cpu_to_le32(cmfbi->ad->paddr);
 523                         else
 524                                 ad->next_ad = 0;
 525                         wr_reg_wa(&hw->desc[2], ad->paddr);
 526                 }
 527                 break;
 528         case PLANE1_AOI1:
 529                 pmfbi = machine_data->fsl_diu_info[1]->par;
 530                 ad->next_ad = 0;
 531                 if (hw->desc[1] == machine_data->dummy_ad->paddr)
 532                         wr_reg_wa(&hw->desc[1], ad->paddr);
 533                 else                                    /* AOI0 open */
 534                         pmfbi->ad->next_ad = cpu_to_le32(ad->paddr);
 535                 break;
 536         case PLANE2_AOI1:
 537                 pmfbi = machine_data->fsl_diu_info[3]->par;
 538                 ad->next_ad = 0;
 539                 if (hw->desc[2] == machine_data->dummy_ad->paddr)
 540                         wr_reg_wa(&hw->desc[2], ad->paddr);
 541                 else                            /* AOI0 was open */
 542                         pmfbi->ad->next_ad = cpu_to_le32(ad->paddr);
 543                 break;
 544         }
 545 }
 546
 547 static void fsl_diu_disable_panel(struct fb_info *info)
 548 {
 549         struct mfb_info *pmfbi, *cmfbi, *mfbi = info->par;
 550         struct diu_ad *ad = mfbi->ad;
 551         struct fsl_diu_data *machine_data = mfbi->parent;
 552         struct diu __iomem *hw = machine_data->diu_reg;
 553
 554         switch (mfbi->index) {
 555         case PLANE0:
 556                 if (hw->desc[0] != machine_data->dummy_ad->paddr)
 557                         wr_reg_wa(&hw->desc[0], machine_data->dummy_ad->paddr);
 558                 break;
 559         case PLANE1_AOI0:
 560                 cmfbi = machine_data->fsl_diu_info[2]->par;
 561                 if (cmfbi->count > 0)   /* AOI1 is open */
 562                         wr_reg_wa(&hw->desc[1], cmfbi->ad->paddr);
 563                                         /* move AOI1 to the first */
 564                 else                    /* AOI1 was closed */
 565                         wr_reg_wa(&hw->desc[1], machine_data->dummy_ad->paddr);
 566                                         /* close AOI 0 */
 567                 break;
 568         case PLANE2_AOI0:
 569                 cmfbi = machine_data->fsl_diu_info[4]->par;
 570                 if (cmfbi->count > 0)   /* AOI1 is open */
 571                         wr_reg_wa(&hw->desc[2], cmfbi->ad->paddr);
 572                                         /* move AOI1 to the first */
 573                 else                    /* AOI1 was closed */
 574                         wr_reg_wa(&hw->desc[2], machine_data->dummy_ad->paddr);
 575                                         /* close AOI 0 */
 576                 break;
 577         case PLANE1_AOI1:
 578                 pmfbi = machine_data->fsl_diu_info[1]->par;
 579                 if (hw->desc[1] != ad->paddr) {
 580                                 /* AOI1 is not the first in the chain */
 581                         if (pmfbi->count > 0)
 582                                         /* AOI0 is open, must be the first */
 583                                 pmfbi->ad->next_ad = 0;
 584                 } else                  /* AOI1 is the first in the chain */
 585                         wr_reg_wa(&hw->desc[1], machine_data->dummy_ad->paddr);
 586                                         /* close AOI 1 */
 587                 break;
 588         case PLANE2_AOI1:
 589                 pmfbi = machine_data->fsl_diu_info[3]->par;
 590                 if (hw->desc[2] != ad->paddr) {
 591                                 /* AOI1 is not the first in the chain */
 592                         if (pmfbi->count > 0)
 593                                 /* AOI0 is open, must be the first */
 594                                 pmfbi->ad->next_ad = 0;
 595                 } else          /* AOI1 is the first in the chain */
 596                         wr_reg_wa(&hw->desc[2], machine_data->dummy_ad->paddr);
 597                                 /* close AOI 1 */
 598                 break;
 599         }
 600 }
 601
 602 static void enable_lcdc(struct fb_info *info)
 603 {
 604         struct mfb_info *mfbi = info->par;
 605         struct fsl_diu_data *machine_data = mfbi->parent;
 606         struct diu __iomem *hw = machine_data->diu_reg;
 607
 608         if (!machine_data->fb_enabled) {
 609                 out_be32(&hw->diu_mode, MFB_MODE1);
 610                 machine_data->fb_enabled++;
 611         }
 612 }
 613
 614 static void disable_lcdc(struct fb_info *info)
 615 {
 616         struct mfb_info *mfbi = info->par;
 617         struct fsl_diu_data *machine_data = mfbi->parent;
 618         struct diu __iomem *hw = machine_data->diu_reg;
 619
 620         if (machine_data->fb_enabled) {
 621                 out_be32(&hw->diu_mode, 0);
 622                 machine_data->fb_enabled = 0;
 623         }
 624 }
 625
 626 static void adjust_aoi_size_position(struct fb_var_screeninfo *var,
 627                                 struct fb_info *info)
 628 {
 629         struct mfb_info *lower_aoi_mfbi, *upper_aoi_mfbi, *mfbi = info->par;
 630         struct fsl_diu_data *machine_data = mfbi->parent;
 631         int available_height, upper_aoi_bottom;
 632         enum mfb_index index = mfbi->index;
 633         int lower_aoi_is_open, upper_aoi_is_open;
 634         __u32 base_plane_width, base_plane_height, upper_aoi_height;
 635
 636         base_plane_width = machine_data->fsl_diu_info[0]->var.xres;
 637         base_plane_height = machine_data->fsl_diu_info[0]->var.yres;
 638
 639         if (mfbi->x_aoi_d < 0)
 640                 mfbi->x_aoi_d = 0;
 641         if (mfbi->y_aoi_d < 0)
 642                 mfbi->y_aoi_d = 0;
 643         switch (index) {
 644         case PLANE0:
 645                 if (mfbi->x_aoi_d != 0)
 646                         mfbi->x_aoi_d = 0;
 647                 if (mfbi->y_aoi_d != 0)
 648                         mfbi->y_aoi_d = 0;
 649                 break;
 650         case PLANE1_AOI0:
 651         case PLANE2_AOI0:
 652                 lower_aoi_mfbi = machine_data->fsl_diu_info[index+1]->par;
 653                 lower_aoi_is_open = lower_aoi_mfbi->count > 0 ? 1 : 0;
 654                 if (var->xres > base_plane_width)
 655                         var->xres = base_plane_width;
 656                 if ((mfbi->x_aoi_d + var->xres) > base_plane_width)
 657                         mfbi->x_aoi_d = base_plane_width - var->xres;
 658
 659                 if (lower_aoi_is_open)
 660                         available_height = lower_aoi_mfbi->y_aoi_d;
 661                 else
 662                         available_height = base_plane_height;
 663                 if (var->yres > available_height)
 664                         var->yres = available_height;
 665                 if ((mfbi->y_aoi_d + var->yres) > available_height)
 666                         mfbi->y_aoi_d = available_height - var->yres;
 667                 break;
 668         case PLANE1_AOI1:
 669         case PLANE2_AOI1:
 670                 upper_aoi_mfbi = machine_data->fsl_diu_info[index-1]->par;
 671                 upper_aoi_height =
 672                                 machine_data->fsl_diu_info[index-1]->var.yres;
 673                 upper_aoi_bottom = upper_aoi_mfbi->y_aoi_d + upper_aoi_height;
 674                 upper_aoi_is_open = upper_aoi_mfbi->count > 0 ? 1 : 0;
 675                 if (var->xres > base_plane_width)
 676                         var->xres = base_plane_width;
 677                 if ((mfbi->x_aoi_d + var->xres) > base_plane_width)
 678                         mfbi->x_aoi_d = base_plane_width - var->xres;
 679                 if (mfbi->y_aoi_d < 0)
 680                         mfbi->y_aoi_d = 0;
 681                 if (upper_aoi_is_open) {
 682                         if (mfbi->y_aoi_d < upper_aoi_bottom)
 683                                 mfbi->y_aoi_d = upper_aoi_bottom;
 684                         available_height = base_plane_height
 685                                                 - upper_aoi_bottom;
 686                 } else
 687                         available_height = base_plane_height;
 688                 if (var->yres > available_height)
 689                         var->yres = available_height;
 690                 if ((mfbi->y_aoi_d + var->yres) > base_plane_height)
 691                         mfbi->y_aoi_d = base_plane_height - var->yres;
 692                 break;
 693         }
 694 }
 695 /*
 696  * Checks to see if the hardware supports the state requested by var passed
 697  * in. This function does not alter the hardware state! If the var passed in
 698  * is slightly off by what the hardware can support then we alter the var
 699  * PASSED in to what we can do. If the hardware doesn't support mode change
 700  * a -EINVAL will be returned by the upper layers.
 701  */
 702 static int fsl_diu_check_var(struct fb_var_screeninfo *var,
 703                                 struct fb_info *info)
 704 {
 705         if (var->xres_virtual < var->xres)
 706                 var->xres_virtual = var->xres;
 707         if (var->yres_virtual < var->yres)
 708                 var->yres_virtual = var->yres;
 709
 710         if (var->xoffset < 0)
 711                 var->xoffset = 0;
 712
 713         if (var->yoffset < 0)
 714                 var->yoffset = 0;
 715
 716         if (var->xoffset + info->var.xres > info->var.xres_virtual)
 717                 var->xoffset = info->var.xres_virtual - info->var.xres;
 718
 719         if (var->yoffset + info->var.yres > info->var.yres_virtual)
 720                 var->yoffset = info->var.yres_virtual - info->var.yres;
 721
 722         if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) &&
 723             (var->bits_per_pixel != 16))
 724                 var->bits_per_pixel = default_bpp;
 725
 726         switch (var->bits_per_pixel) {
 727         case 16:
 728                 var->red.length = 5;
 729                 var->red.offset = 11;
 730                 var->red.msb_right = 0;
 731
 732                 var->green.length = 6;
 733                 var->green.offset = 5;
 734                 var->green.msb_right = 0;
 735
 736                 var->blue.length = 5;
 737                 var->blue.offset = 0;
 738                 var->blue.msb_right = 0;
 739
 740                 var->transp.length = 0;
 741                 var->transp.offset = 0;
 742                 var->transp.msb_right = 0;
 743                 break;
 744         case 24:
 745                 var->red.length = 8;
 746                 var->red.offset = 0;
 747                 var->red.msb_right = 0;
 748
 749                 var->green.length = 8;
 750                 var->green.offset = 8;
 751                 var->green.msb_right = 0;
 752
 753                 var->blue.length = 8;
 754                 var->blue.offset = 16;
 755                 var->blue.msb_right = 0;
 756
 757                 var->transp.length = 0;
 758                 var->transp.offset = 0;
 759                 var->transp.msb_right = 0;
 760                 break;
 761         case 32:
 762                 var->red.length = 8;
 763                 var->red.offset = 16;
 764                 var->red.msb_right = 0;
 765
 766                 var->green.length = 8;
 767                 var->green.offset = 8;
 768                 var->green.msb_right = 0;
 769
 770                 var->blue.length = 8;
 771                 var->blue.offset = 0;
 772                 var->blue.msb_right = 0;
 773
 774                 var->transp.length = 8;
 775                 var->transp.offset = 24;
 776                 var->transp.msb_right = 0;
 777
 778                 break;
 779         }
 780
 781         var->height = -1;
 782         var->width = -1;
 783         var->grayscale = 0;
 784
 785         /* Copy nonstd field to/from sync for fbset usage */
 786         var->sync |= var->nonstd;
 787         var->nonstd |= var->sync;
 788
 789         adjust_aoi_size_position(var, info);
 790         return 0;
 791 }
 792
 793 static void set_fix(struct fb_info *info)
 794 {
 795         struct fb_fix_screeninfo *fix = &info->fix;
 796         struct fb_var_screeninfo *var = &info->var;
 797         struct mfb_info *mfbi = info->par;
 798
 799         strncpy(fix->id, mfbi->id, sizeof(fix->id));
 800         fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
 801         fix->type = FB_TYPE_PACKED_PIXELS;
 802         fix->accel = FB_ACCEL_NONE;
 803         fix->visual = FB_VISUAL_TRUECOLOR;
 804         fix->xpanstep = 1;
 805         fix->ypanstep = 1;
 806 }
 807
 808 static void update_lcdc(struct fb_info *info)
 809 {
 810         struct fb_var_screeninfo *var = &info->var;
 811         struct mfb_info *mfbi = info->par;
 812         struct fsl_diu_data *machine_data = mfbi->parent;
 813         struct diu __iomem *hw;
 814         int i, j;
 815         char __iomem *cursor_base, *gamma_table_base;
 816
 817         u32 temp;
 818
 819         hw = machine_data->diu_reg;
 820
 821         diu_ops.set_monitor_port(machine_data->monitor_port);
 822         gamma_table_base = machine_data->gamma.vaddr;
 823         cursor_base = machine_data->cursor.vaddr;
 824         /* Prep for DIU init  - gamma table, cursor table */
 825
 826         for (i = 0; i <= 2; i++)
 827                 for (j = 0; j <= 255; j++)
 828                         *gamma_table_base++ = j;
 829
 830         diu_ops.set_gamma_table(machine_data->monitor_port,
 831                                 machine_data->gamma.vaddr);
 832
 833         disable_lcdc(info);
 834
 835         /* Program DIU registers */
 836
 837         out_be32(&hw->gamma, machine_data->gamma.paddr);
 838         out_be32(&hw->cursor, machine_data->cursor.paddr);
 839
 840         out_be32(&hw->bgnd, 0x007F7F7F);        /* BGND */
 841         out_be32(&hw->bgnd_wb, 0);              /* BGND_WB */
 842         out_be32(&hw->disp_size, (var->yres << 16 | var->xres));
 843                                                 /* DISP SIZE */
 844         out_be32(&hw->wb_size, 0); /* WB SIZE */
 845         out_be32(&hw->wb_mem_addr, 0); /* WB MEM ADDR */
 846
 847         /* Horizontal and vertical configuration register */
 848         temp = var->left_margin << 22 | /* BP_H */
 849                var->hsync_len << 11 |   /* PW_H */
 850                var->right_margin;       /* FP_H */
 851
 852         out_be32(&hw->hsyn_para, temp);
 853
 854         temp = var->upper_margin << 22 | /* BP_V */
 855                var->vsync_len << 11 |    /* PW_V  */
 856                var->lower_margin;        /* FP_V  */
 857
 858         out_be32(&hw->vsyn_para, temp);
 859
 860         diu_ops.set_pixel_clock(var->pixclock);
 861
 862         out_be32(&hw->syn_pol, 0);      /* SYNC SIGNALS POLARITY */
 863         out_be32(&hw->thresholds, 0x00037800); /* The Thresholds */
 864         out_be32(&hw->int_status, 0);   /* INTERRUPT STATUS */
 865         out_be32(&hw->plut, 0x01F5F666);
 866
 867         /* Enable the DIU */
 868         enable_lcdc(info);
 869 }
 870
 871 static int map_video_memory(struct fb_info *info)
 872 {
 873         phys_addr_t phys;
 874         u32 smem_len = info->fix.line_length * info->var.yres_virtual;
 875
 876         info->screen_base = fsl_diu_alloc(smem_len, &phys);
 877         if (info->screen_base == NULL) {
 878                 dev_err(info->dev, "unable to allocate fb memory\n");
 879                 return -ENOMEM;
 880         }
 881         mutex_lock(&info->mm_lock);
 882         info->fix.smem_start = (unsigned long) phys;
 883         info->fix.smem_len = smem_len;
 884         mutex_unlock(&info->mm_lock);
 885         info->screen_size = info->fix.smem_len;
 886
 887         return 0;
 888 }
 889
 890 static void unmap_video_memory(struct fb_info *info)
 891 {
 892         fsl_diu_free(info->screen_base, info->fix.smem_len);
 893         mutex_lock(&info->mm_lock);
 894         info->screen_base = NULL;
 895         info->fix.smem_start = 0;
 896         info->fix.smem_len = 0;
 897         mutex_unlock(&info->mm_lock);
 898 }
 899
 900 /*
 901  * Using the fb_var_screeninfo in fb_info we set the aoi of this
 902  * particular framebuffer. It is a light version of fsl_diu_set_par.
 903  */
 904 static int fsl_diu_set_aoi(struct fb_info *info)
 905 {
 906         struct fb_var_screeninfo *var = &info->var;
 907         struct mfb_info *mfbi = info->par;
 908         struct diu_ad *ad = mfbi->ad;
 909
 910         /* AOI should not be greater than display size */
 911         ad->offset_xyi = cpu_to_le32((var->yoffset << 16) | var->xoffset);
 912         ad->offset_xyd = cpu_to_le32((mfbi->y_aoi_d << 16) | mfbi->x_aoi_d);
 913         return 0;
 914 }
 915
 916 /*
 917  * Using the fb_var_screeninfo in fb_info we set the resolution of this
 918  * particular framebuffer. This function alters the fb_fix_screeninfo stored
 919  * in fb_info. It does not alter var in fb_info since we are using that
 920  * data. This means we depend on the data in var inside fb_info to be
 921  * supported by the hardware. fsl_diu_check_var is always called before
 922  * fsl_diu_set_par to ensure this.
 923  */
 924 static int fsl_diu_set_par(struct fb_info *info)
 925 {
 926         unsigned long len;
 927         struct fb_var_screeninfo *var = &info->var;
 928         struct mfb_info *mfbi = info->par;
 929         struct fsl_diu_data *machine_data = mfbi->parent;
 930         struct diu_ad *ad = mfbi->ad;
 931         struct diu __iomem *hw;
 932
 933         hw = machine_data->diu_reg;
 934
 935         set_fix(info);
 936         mfbi->cursor_reset = 1;
 937
 938         len = info->var.yres_virtual * info->fix.line_length;
 939         /* Alloc & dealloc each time resolution/bpp change */
 940         if (len != info->fix.smem_len) {
 941                 if (info->fix.smem_start)
 942                         unmap_video_memory(info);
 943
 944                 /* Memory allocation for framebuffer */
 945                 if (map_video_memory(info)) {
 946                         dev_err(info->dev, "unable to allocate fb memory 1\n");
 947                         return -ENOMEM;
 948                 }
 949         }
 950
 951         ad->pix_fmt = diu_ops.get_pixel_format(machine_data->monitor_port,
 952                                                var->bits_per_pixel);
 953         ad->addr    = cpu_to_le32(info->fix.smem_start);
 954         ad->src_size_g_alpha = cpu_to_le32((var->yres_virtual << 12) |
 955                                 var->xres_virtual) | mfbi->g_alpha;
 956         /* AOI should not be greater than display size */
 957         ad->aoi_size    = cpu_to_le32((var->yres << 16) | var->xres);
 958         ad->offset_xyi = cpu_to_le32((var->yoffset << 16) | var->xoffset);
 959         ad->offset_xyd = cpu_to_le32((mfbi->y_aoi_d << 16) | mfbi->x_aoi_d);
 960
 961         /* Disable chroma keying function */
 962         ad->ckmax_r = 0;
 963         ad->ckmax_g = 0;
 964         ad->ckmax_b = 0;
 965
 966         ad->ckmin_r = 255;
 967         ad->ckmin_g = 255;
 968         ad->ckmin_b = 255;
 969
 970         if (mfbi->index == PLANE0)
 971                 update_lcdc(info);
 972         return 0;
 973 }
 974
 975 static inline __u32 CNVT_TOHW(__u32 val, __u32 width)
 976 {
 977         return ((val << width) + 0x7FFF - val) >> 16;
 978 }
 979
 980 /*
 981  * Set a single color register. The values supplied have a 16 bit magnitude
 982  * which needs to be scaled in this function for the hardware. Things to take
 983  * into consideration are how many color registers, if any, are supported with
 984  * the current color visual. With truecolor mode no color palettes are
 985  * supported. Here a pseudo palette is created which we store the value in
 986  * pseudo_palette in struct fb_info. For pseudocolor mode we have a limited
 987  * color palette.
 988  */
 989 static int fsl_diu_setcolreg(unsigned int regno, unsigned int red,
 990                              unsigned int green, unsigned int blue,
 991                              unsigned int transp, struct fb_info *info)
 992 {
 993         int ret = 1;
 994
 995         /*
 996          * If greyscale is true, then we convert the RGB value
 997          * to greyscale no matter what visual we are using.
 998          */
 999         if (info->var.grayscale)
1000                 red = green = blue = (19595 * red + 38470 * green +
1001                                       7471 * blue) >> 16;
1002         switch (info->fix.visual) {
1003         case FB_VISUAL_TRUECOLOR:
1004                 /*
1005                  * 16-bit True Colour.  We encode the RGB value
1006                  * according to the RGB bitfield information.
1007                  */
1008                 if (regno < 16) {
1009                         u32 *pal = info->pseudo_palette;
1010                         u32 v;
1011
1012                         red = CNVT_TOHW(red, info->var.red.length);
1013                         green = CNVT_TOHW(green, info->var.green.length);
1014                         blue = CNVT_TOHW(blue, info->var.blue.length);
1015                         transp = CNVT_TOHW(transp, info->var.transp.length);
1016
1017                         v = (red << info->var.red.offset) |
1018                             (green << info->var.green.offset) |
1019                             (blue << info->var.blue.offset) |
1020                             (transp << info->var.transp.offset);
1021
1022                         pal[regno] = v;
1023                         ret = 0;
1024                 }
1025                 break;
1026         }
1027
1028         return ret;
1029 }
1030
1031 /*
1032  * Pan (or wrap, depending on the `vmode' field) the display using the
1033  * 'xoffset' and 'yoffset' fields of the 'var' structure. If the values
1034  * don't fit, return -EINVAL.
1035  */
1036 static int fsl_diu_pan_display(struct fb_var_screeninfo *var,
1037                              struct fb_info *info)
1038 {
1039         if ((info->var.xoffset == var->xoffset) &&
1040             (info->var.yoffset == var->yoffset))
1041                 return 0;       /* No change, do nothing */
1042
1043         if (var->xoffset < 0 || var->yoffset < 0
1044             || var->xoffset + info->var.xres > info->var.xres_virtual
1045             || var->yoffset + info->var.yres > info->var.yres_virtual)
1046                 return -EINVAL;
1047
1048         info->var.xoffset = var->xoffset;
1049         info->var.yoffset = var->yoffset;
1050
1051         if (var->vmode & FB_VMODE_YWRAP)
1052                 info->var.vmode |= FB_VMODE_YWRAP;
1053         else
1054                 info->var.vmode &= ~FB_VMODE_YWRAP;
1055
1056         fsl_diu_set_aoi(info);
1057
1058         return 0;
1059 }
1060
1061 static int fsl_diu_ioctl(struct fb_info *info, unsigned int cmd,
1062                        unsigned long arg)
1063 {
1064         struct mfb_info *mfbi = info->par;
1065         struct diu_ad *ad = mfbi->ad;
1066         struct mfb_chroma_key ck;
1067         unsigned char global_alpha;
1068         struct aoi_display_offset aoi_d;
1069         __u32 pix_fmt;
1070         void __user *buf = (void __user *)arg;
1071
1072         if (!arg)
1073                 return -EINVAL;
1074         switch (cmd) {
1075         case MFB_SET_PIXFMT_OLD:
1076                 dev_warn(info->dev,
1077                          "MFB_SET_PIXFMT value of 0x%08x is deprecated.\n",
1078                          MFB_SET_PIXFMT_OLD);
1079         case MFB_SET_PIXFMT:
1080                 if (copy_from_user(&pix_fmt, buf, sizeof(pix_fmt)))
1081                         return -EFAULT;
1082                 ad->pix_fmt = pix_fmt;
1083                 break;
1084         case MFB_GET_PIXFMT_OLD:
1085                 dev_warn(info->dev,
1086                          "MFB_GET_PIXFMT value of 0x%08x is deprecated.\n",
1087                          MFB_GET_PIXFMT_OLD);
1088         case MFB_GET_PIXFMT:
1089                 pix_fmt = ad->pix_fmt;
1090                 if (copy_to_user(buf, &pix_fmt, sizeof(pix_fmt)))
1091                         return -EFAULT;
1092                 break;
1093         case MFB_SET_AOID:
1094                 if (copy_from_user(&aoi_d, buf, sizeof(aoi_d)))
1095                         return -EFAULT;
1096                 mfbi->x_aoi_d = aoi_d.x_aoi_d;
1097                 mfbi->y_aoi_d = aoi_d.y_aoi_d;
1098                 fsl_diu_check_var(&info->var, info);
1099                 fsl_diu_set_aoi(info);
1100                 break;
1101         case MFB_GET_AOID:
1102                 aoi_d.x_aoi_d = mfbi->x_aoi_d;
1103                 aoi_d.y_aoi_d = mfbi->y_aoi_d;
1104                 if (copy_to_user(buf, &aoi_d, sizeof(aoi_d)))
1105                         return -EFAULT;
1106                 break;
1107         case MFB_GET_ALPHA:
1108                 global_alpha = mfbi->g_alpha;
1109                 if (copy_to_user(buf, &global_alpha, sizeof(global_alpha)))
1110                         return -EFAULT;
1111                 break;
1112         case MFB_SET_ALPHA:
1113                 /* set panel information */
1114                 if (copy_from_user(&global_alpha, buf, sizeof(global_alpha)))
1115                         return -EFAULT;
1116                 ad->src_size_g_alpha = (ad->src_size_g_alpha & (~0xff)) |
1117                                                         (global_alpha & 0xff);
1118                 mfbi->g_alpha = global_alpha;
1119                 break;
1120         case MFB_SET_CHROMA_KEY:
1121                 /* set panel winformation */
1122                 if (copy_from_user(&ck, buf, sizeof(ck)))
1123                         return -EFAULT;
1124
1125                 if (ck.enable &&
1126                    (ck.red_max < ck.red_min ||
1127                     ck.green_max < ck.green_min ||
1128                     ck.blue_max < ck.blue_min))
1129                         return -EINVAL;
1130
1131                 if (!ck.enable) {
1132                         ad->ckmax_r = 0;
1133                         ad->ckmax_g = 0;
1134                         ad->ckmax_b = 0;
1135                         ad->ckmin_r = 255;
1136                         ad->ckmin_g = 255;
1137                         ad->ckmin_b = 255;
1138                 } else {
1139                         ad->ckmax_r = ck.red_max;
1140                         ad->ckmax_g = ck.green_max;
1141                         ad->ckmax_b = ck.blue_max;
1142                         ad->ckmin_r = ck.red_min;
1143                         ad->ckmin_g = ck.green_min;
1144                         ad->ckmin_b = ck.blue_min;
1145                 }
1146                 break;
1147         default:
1148                 dev_err(info->dev, "unknown ioctl command (0x%08X)\n", cmd);
1149                 return -ENOIOCTLCMD;
1150         }
1151
1152         return 0;
1153 }
1154
1155 /* turn on fb if count == 1
1156  */
1157 static int fsl_diu_open(struct fb_info *info, int user)
1158 {
1159         struct mfb_info *mfbi = info->par;
1160         int res = 0;
1161
1162         /* free boot splash memory on first /dev/fb0 open */
1163         if ((mfbi->index == PLANE0) && diu_ops.release_bootmem)
1164                 diu_ops.release_bootmem();
1165
1166         spin_lock(&diu_lock);
1167         mfbi->count++;
1168         if (mfbi->count == 1) {
1169                 fsl_diu_check_var(&info->var, info);
1170                 res = fsl_diu_set_par(info);
1171                 if (res < 0)
1172                         mfbi->count--;
1173                 else
1174                         fsl_diu_enable_panel(info);
1175         }
1176
1177         spin_unlock(&diu_lock);
1178         return res;
1179 }
1180
1181 /* turn off fb if count == 0
1182  */
1183 static int fsl_diu_release(struct fb_info *info, int user)
1184 {
1185         struct mfb_info *mfbi = info->par;
1186         int res = 0;
1187
1188         spin_lock(&diu_lock);
1189         mfbi->count--;
1190         if (mfbi->count == 0)
1191                 fsl_diu_disable_panel(info);
1192
1193         spin_unlock(&diu_lock);
1194         return res;
1195 }
1196
1197 static struct fb_ops fsl_diu_ops = {
1198         .owner = THIS_MODULE,
1199         .fb_check_var = fsl_diu_check_var,
1200         .fb_set_par = fsl_diu_set_par,
1201         .fb_setcolreg = fsl_diu_setcolreg,
1202         .fb_pan_display = fsl_diu_pan_display,
1203         .fb_fillrect = cfb_fillrect,
1204         .fb_copyarea = cfb_copyarea,
1205         .fb_imageblit = cfb_imageblit,
1206         .fb_ioctl = fsl_diu_ioctl,
1207         .fb_open = fsl_diu_open,
1208         .fb_release = fsl_diu_release,
1209 };
1210
1211 static int init_fbinfo(struct fb_info *info)
1212 {
1213         struct mfb_info *mfbi = info->par;
1214
1215         info->device = NULL;
1216         info->var.activate = FB_ACTIVATE_NOW;
1217         info->fbops = &fsl_diu_ops;
1218         info->flags = FBINFO_FLAG_DEFAULT;
1219         info->pseudo_palette = &mfbi->pseudo_palette;
1220
1221         /* Allocate colormap */
1222         fb_alloc_cmap(&info->cmap, 16, 0);
1223         return 0;
1224 }
1225
1226 static int __devinit install_fb(struct fb_info *info)
1227 {
1228         int rc;
1229         struct mfb_info *mfbi = info->par;
1230         const char *aoi_mode, *init_aoi_mode = "320x240";
1231         struct fb_videomode *db = fsl_diu_mode_db;
1232         unsigned int dbsize = ARRAY_SIZE(fsl_diu_mode_db);
1233         int has_default_mode = 1;
1234
1235         if (init_fbinfo(info))
1236                 return -EINVAL;
1237
1238         if (mfbi->index == PLANE0) {
1239                 if (mfbi->edid_data) {
1240                         /* Now build modedb from EDID */
1241                         fb_edid_to_monspecs(mfbi->edid_data, &info->monspecs);
1242                         fb_videomode_to_modelist(info->monspecs.modedb,
1243                                                  info->monspecs.modedb_len,
1244                                                  &info->modelist);
1245                         db = info->monspecs.modedb;
1246                         dbsize = info->monspecs.modedb_len;
1247                 }
1248                 aoi_mode = fb_mode;
1249         } else {
1250                 aoi_mode = init_aoi_mode;
1251         }
1252         rc = fb_find_mode(&info->var, info, aoi_mode, db, dbsize, NULL,
1253                           default_bpp);
1254         if (!rc) {
1255                 /*
1256                  * For plane 0 we continue and look into
1257                  * driver's internal modedb.
1258                  */
1259                 if ((mfbi->index == PLANE0) && mfbi->edid_data)
1260                         has_default_mode = 0;
1261                 else
1262                         return -EINVAL;
1263         }
1264
1265         if (!has_default_mode) {
1266                 rc = fb_find_mode(&info->var, info, aoi_mode, fsl_diu_mode_db,
1267                         ARRAY_SIZE(fsl_diu_mode_db), NULL, default_bpp);
1268                 if (rc)
1269                         has_default_mode = 1;
1270         }
1271
1272         /* Still not found, use preferred mode from database if any */
1273         if (!has_default_mode && info->monspecs.modedb) {
1274                 struct fb_monspecs *specs = &info->monspecs;
1275                 struct fb_videomode *modedb = &specs->modedb[0];
1276
1277                 /*
1278                  * Get preferred timing. If not found,
1279                  * first mode in database will be used.
1280                  */
1281                 if (specs->misc & FB_MISC_1ST_DETAIL) {
1282                         int i;
1283
1284                         for (i = 0; i < specs->modedb_len; i++) {
1285                                 if (specs->modedb[i].flag & FB_MODE_IS_FIRST) {
1286                                         modedb = &specs->modedb[i];
1287                                         break;
1288                                 }
1289                         }
1290                 }
1291
1292                 info->var.bits_per_pixel = default_bpp;
1293                 fb_videomode_to_var(&info->var, modedb);
1294         }
1295
1296         if (fsl_diu_check_var(&info->var, info)) {
1297                 dev_err(info->dev, "fsl_diu_check_var failed\n");
1298                 unmap_video_memory(info);
1299                 fb_dealloc_cmap(&info->cmap);
1300                 return -EINVAL;
1301         }
1302
1303         if (register_framebuffer(info) < 0) {
1304                 dev_err(info->dev, "register_framebuffer failed\n");
1305                 unmap_video_memory(info);
1306                 fb_dealloc_cmap(&info->cmap);
1307                 return -EINVAL;
1308         }
1309
1310         mfbi->registered = 1;
1311         dev_info(info->dev, "%s registered successfully\n", mfbi->id);
1312
1313         return 0;
1314 }
1315
1316 static void uninstall_fb(struct fb_info *info)
1317 {
1318         struct mfb_info *mfbi = info->par;
1319
1320         if (!mfbi->registered)
1321                 return;
1322
1323         if (mfbi->index == PLANE0)
1324                 kfree(mfbi->edid_data);
1325
1326         unregister_framebuffer(info);
1327         unmap_video_memory(info);
1328         if (&info->cmap)
1329                 fb_dealloc_cmap(&info->cmap);
1330
1331         mfbi->registered = 0;
1332 }
1333
1334 static irqreturn_t fsl_diu_isr(int irq, void *dev_id)
1335 {
1336         struct diu __iomem *hw = dev_id;
1337         unsigned int status = in_be32(&hw->int_status);
1338
1339         if (status) {
1340                 /* This is the workaround for underrun */
1341                 if (status & INT_UNDRUN) {
1342                         out_be32(&hw->diu_mode, 0);
1343                         udelay(1);
1344                         out_be32(&hw->diu_mode, 1);
1345                 }
1346 #if defined(CONFIG_NOT_COHERENT_CACHE)
1347                 else if (status & INT_VSYNC) {
1348                         unsigned int i;
1349
1350                         for (i = 0; i < coherence_data_size;
1351                                 i += d_cache_line_size)
1352                                 __asm__ __volatile__ (
1353                                         "dcbz 0, %[input]"
1354                                 ::[input]"r"(&coherence_data[i]));
1355                 }
1356 #endif
1357                 return IRQ_HANDLED;
1358         }
1359         return IRQ_NONE;
1360 }
1361
1362 static int request_irq_local(struct fsl_diu_data *machine_data)
1363 {
1364         struct diu __iomem *hw = machine_data->diu_reg;
1365         u32 ints;
1366         int ret;
1367
1368         /* Read to clear the status */
1369         in_be32(&hw->int_status);
1370
1371         ret = request_irq(machine_data->irq, fsl_diu_isr, 0, "fsl-diu-fb", hw);
1372         if (!ret) {
1373                 ints = INT_PARERR | INT_LS_BF_VS;
1374 #if !defined(CONFIG_NOT_COHERENT_CACHE)
1375                 ints |= INT_VSYNC;
1376 #endif
1377
1378                 /* Read to clear the status */
1379                 in_be32(&hw->int_status);
1380                 out_be32(&hw->int_mask, ints);
1381         }
1382
1383         return ret;
1384 }
1385
1386 static void free_irq_local(struct fsl_diu_data *machine_data)
1387 {
1388         struct diu __iomem *hw = machine_data->diu_reg;
1389
1390         /* Disable all LCDC interrupt */
1391         out_be32(&hw->int_mask, 0x1f);
1392
1393         free_irq(machine_data->irq, NULL);
1394 }
1395
1396 #ifdef CONFIG_PM
1397 /*
1398  * Power management hooks. Note that we won't be called from IRQ context,
1399  * unlike the blank functions above, so we may sleep.
1400  */
1401 static int fsl_diu_suspend(struct platform_device *ofdev, pm_message_t state)
1402 {
1403         struct fsl_diu_data *machine_data;
1404
1405         machine_data = dev_get_drvdata(&ofdev->dev);
1406         disable_lcdc(machine_data->fsl_diu_info[0]);
1407
1408         return 0;
1409 }
1410
1411 static int fsl_diu_resume(struct platform_device *ofdev)
1412 {
1413         struct fsl_diu_data *machine_data;
1414
1415         machine_data = dev_get_drvdata(&ofdev->dev);
1416         enable_lcdc(machine_data->fsl_diu_info[0]);
1417
1418         return 0;
1419 }
1420
1421 #else
1422 #define fsl_diu_suspend NULL
1423 #define fsl_diu_resume NULL
1424 #endif                          /* CONFIG_PM */
1425
1426 /* Align to 64-bit(8-byte), 32-byte, etc. */
1427 static int allocate_buf(struct device *dev, struct diu_addr *buf, u32 size,
1428                         u32 bytes_align)
1429 {
1430         u32 offset;
1431         dma_addr_t mask;
1432
1433         buf->vaddr =
1434                 dma_alloc_coherent(dev, size + bytes_align, &buf->paddr,
1435                                    GFP_DMA | __GFP_ZERO);
1436         if (!buf->vaddr)
1437                 return -ENOMEM;
1438
1439         mask = bytes_align - 1;
1440         offset = buf->paddr & mask;
1441         if (offset) {
1442                 buf->offset = bytes_align - offset;
1443                 buf->paddr = buf->paddr + offset;
1444         } else
1445                 buf->offset = 0;
1446
1447         return 0;
1448 }
1449
1450 static void free_buf(struct device *dev, struct diu_addr *buf, u32 size,
1451                      u32 bytes_align)
1452 {
1453         dma_free_coherent(dev, size + bytes_align, buf->vaddr,
1454                           buf->paddr - buf->offset);
1455 }
1456
1457 static ssize_t store_monitor(struct device *device,
1458         struct device_attribute *attr, const char *buf, size_t count)
1459 {
1460         enum fsl_diu_monitor_port old_monitor_port;
1461         struct fsl_diu_data *machine_data =
1462                 container_of(attr, struct fsl_diu_data, dev_attr);
1463
1464         old_monitor_port = machine_data->monitor_port;
1465         machine_data->monitor_port = fsl_diu_name_to_port(buf);
1466
1467         if (old_monitor_port != machine_data->monitor_port) {
1468                 /* All AOIs need adjust pixel format
1469                  * fsl_diu_set_par only change the pixsel format here
1470                  * unlikely to fail. */
1471                 fsl_diu_set_par(machine_data->fsl_diu_info[0]);
1472                 fsl_diu_set_par(machine_data->fsl_diu_info[1]);
1473                 fsl_diu_set_par(machine_data->fsl_diu_info[2]);
1474                 fsl_diu_set_par(machine_data->fsl_diu_info[3]);
1475                 fsl_diu_set_par(machine_data->fsl_diu_info[4]);
1476         }
1477         return count;
1478 }
1479
1480 static ssize_t show_monitor(struct device *device,
1481         struct device_attribute *attr, char *buf)
1482 {
1483         struct fsl_diu_data *machine_data =
1484                 container_of(attr, struct fsl_diu_data, dev_attr);
1485
1486         switch (machine_data->monitor_port) {
1487         case FSL_DIU_PORT_DVI:
1488                 return sprintf(buf, "DVI\n");
1489         case FSL_DIU_PORT_LVDS:
1490                 return sprintf(buf, "Single-link LVDS\n");
1491         case FSL_DIU_PORT_DLVDS:
1492                 return sprintf(buf, "Dual-link LVDS\n");
1493         }
1494
1495         return 0;
1496 }
1497
1498 static int __devinit fsl_diu_probe(struct platform_device *pdev)
1499 {
1500         struct device_node *np = pdev->dev.of_node;
1501         struct mfb_info *mfbi;
1502         phys_addr_t dummy_ad_addr = 0;
1503         int ret, i, error = 0;
1504         struct fsl_diu_data *machine_data;
1505         int diu_mode;
1506
1507         machine_data = kzalloc(sizeof(struct fsl_diu_data), GFP_KERNEL);
1508         if (!machine_data)
1509                 return -ENOMEM;
1510
1511         spin_lock_init(&machine_data->reg_lock);
1512
1513         for (i = 0; i < ARRAY_SIZE(machine_data->fsl_diu_info); i++) {
1514                 machine_data->fsl_diu_info[i] =
1515                         framebuffer_alloc(sizeof(struct mfb_info), &pdev->dev);
1516                 if (!machine_data->fsl_diu_info[i]) {
1517                         dev_err(&pdev->dev, "cannot allocate memory\n");
1518                         ret = -ENOMEM;
1519                         goto error2;
1520                 }
1521                 mfbi = machine_data->fsl_diu_info[i]->par;
1522                 memcpy(mfbi, &mfb_template[i], sizeof(struct mfb_info));
1523                 mfbi->parent = machine_data;
1524
1525                 if (mfbi->index == PLANE0) {
1526                         const u8 *prop;
1527                         int len;
1528
1529                         /* Get EDID */
1530                         prop = of_get_property(np, "edid", &len);
1531                         if (prop && len == EDID_LENGTH)
1532                                 mfbi->edid_data = kmemdup(prop, EDID_LENGTH,
1533                                                           GFP_KERNEL);
1534                 }
1535         }
1536
1537         machine_data->diu_reg = of_iomap(np, 0);
1538         if (!machine_data->diu_reg) {
1539                 dev_err(&pdev->dev, "cannot map DIU registers\n");
1540                 ret = -EFAULT;
1541                 goto error2;
1542         }
1543
1544         diu_mode = in_be32(&machine_data->diu_reg->diu_mode);
1545         if (diu_mode == MFB_MODE0)
1546                 out_be32(&machine_data->diu_reg->diu_mode, 0); /* disable DIU */
1547
1548         /* Get the IRQ of the DIU */
1549         machine_data->irq = irq_of_parse_and_map(np, 0);
1550
1551         if (!machine_data->irq) {
1552                 dev_err(&pdev->dev, "could not get DIU IRQ\n");
1553                 ret = -EINVAL;
1554                 goto error;
1555         }
1556         machine_data->monitor_port = monitor_port;
1557
1558         /* Area descriptor memory pool aligns to 64-bit boundary */
1559         if (allocate_buf(&pdev->dev, &machine_data->ad,
1560                          sizeof(struct diu_ad) * FSL_AOI_NUM, 8))
1561                 return -ENOMEM;
1562
1563         /* Get memory for Gamma Table  - 32-byte aligned memory */
1564         if (allocate_buf(&pdev->dev, &machine_data->gamma, 768, 32)) {
1565                 ret = -ENOMEM;
1566                 goto error;
1567         }
1568
1569         /* For performance, cursor bitmap buffer aligns to 32-byte boundary */
1570         if (allocate_buf(&pdev->dev, &machine_data->cursor,
1571                          MAX_CURS * MAX_CURS * 2, 32)) {
1572                 ret = -ENOMEM;
1573                 goto error;
1574         }
1575
1576         i = ARRAY_SIZE(machine_data->fsl_diu_info);
1577         machine_data->dummy_ad = (struct diu_ad *)((u32)machine_data->ad.vaddr +
1578                         machine_data->ad.offset) + i;
1579         machine_data->dummy_ad->paddr = machine_data->ad.paddr +
1580                         i * sizeof(struct diu_ad);
1581         machine_data->dummy_aoi_virt = fsl_diu_alloc(64, &dummy_ad_addr);
1582         if (!machine_data->dummy_aoi_virt) {
1583                 ret = -ENOMEM;
1584                 goto error;
1585         }
1586         machine_data->dummy_ad->addr = cpu_to_le32(dummy_ad_addr);
1587         machine_data->dummy_ad->pix_fmt = 0x88882317;
1588         machine_data->dummy_ad->src_size_g_alpha = cpu_to_le32((4 << 12) | 4);
1589         machine_data->dummy_ad->aoi_size = cpu_to_le32((4 << 16) |  2);
1590         machine_data->dummy_ad->offset_xyi = 0;
1591         machine_data->dummy_ad->offset_xyd = 0;
1592         machine_data->dummy_ad->next_ad = 0;
1593
1594         /*
1595          * Let DIU display splash screen if it was pre-initialized
1596          * by the bootloader, set dummy area descriptor otherwise.
1597          */
1598         if (diu_mode == MFB_MODE0)
1599                 out_be32(&machine_data->diu_reg->desc[0],
1600                          machine_data->dummy_ad->paddr);
1601
1602         out_be32(&machine_data->diu_reg->desc[1], machine_data->dummy_ad->paddr);
1603         out_be32(&machine_data->diu_reg->desc[2], machine_data->dummy_ad->paddr);
1604
1605         for (i = 0; i < ARRAY_SIZE(machine_data->fsl_diu_info); i++) {
1606                 machine_data->fsl_diu_info[i]->fix.smem_start = 0;
1607                 mfbi = machine_data->fsl_diu_info[i]->par;
1608                 mfbi->ad = (struct diu_ad *)((u32)machine_data->ad.vaddr
1609                                         + machine_data->ad.offset) + i;
1610                 mfbi->ad->paddr =
1611                         machine_data->ad.paddr + i * sizeof(struct diu_ad);
1612                 ret = install_fb(machine_data->fsl_diu_info[i]);
1613                 if (ret) {
1614                         dev_err(&pdev->dev, "could not register fb %d\n", i);
1615                         goto error;
1616                 }
1617         }
1618
1619         if (request_irq_local(machine_data)) {
1620                 dev_err(&pdev->dev, "could not claim irq\n");
1621                 goto error;
1622         }
1623
1624         sysfs_attr_init(&machine_data->dev_attr.attr);
1625         machine_data->dev_attr.attr.name = "monitor";
1626         machine_data->dev_attr.attr.mode = S_IRUGO|S_IWUSR;
1627         machine_data->dev_attr.show = show_monitor;
1628         machine_data->dev_attr.store = store_monitor;
1629         error = device_create_file(machine_data->fsl_diu_info[0]->dev,
1630                                   &machine_data->dev_attr);
1631         if (error) {
1632                 dev_err(&pdev->dev, "could not create sysfs file %s\n",
1633                         machine_data->dev_attr.attr.name);
1634         }
1635
1636         dev_set_drvdata(&pdev->dev, machine_data);
1637         return 0;
1638
1639 error:
1640         for (i = 0; i < ARRAY_SIZE(machine_data->fsl_diu_info); i++)
1641                 uninstall_fb(machine_data->fsl_diu_info[i]);
1642
1643         if (machine_data->ad.vaddr)
1644                 free_buf(&pdev->dev, &machine_data->ad,
1645                          sizeof(struct diu_ad) * FSL_AOI_NUM, 8);
1646         if (machine_data->gamma.vaddr)
1647                 free_buf(&pdev->dev, &machine_data->gamma, 768, 32);
1648         if (machine_data->cursor.vaddr)
1649                 free_buf(&pdev->dev, &machine_data->cursor,
1650                          MAX_CURS * MAX_CURS * 2, 32);
1651         if (machine_data->dummy_aoi_virt)
1652                 fsl_diu_free(machine_data->dummy_aoi_virt, 64);
1653         iounmap(machine_data->diu_reg);
1654
1655 error2:
1656         for (i = 0; i < ARRAY_SIZE(machine_data->fsl_diu_info); i++)
1657                 if (machine_data->fsl_diu_info[i])
1658                         framebuffer_release(machine_data->fsl_diu_info[i]);
1659         kfree(machine_data);
1660
1661         return ret;
1662 }
1663
1664 static int fsl_diu_remove(struct platform_device *pdev)
1665 {
1666         struct fsl_diu_data *machine_data;
1667         int i;
1668
1669         machine_data = dev_get_drvdata(&pdev->dev);
1670         disable_lcdc(machine_data->fsl_diu_info[0]);
1671         free_irq_local(machine_data);
1672         for (i = 0; i < ARRAY_SIZE(machine_data->fsl_diu_info); i++)
1673                 uninstall_fb(machine_data->fsl_diu_info[i]);
1674         if (machine_data->ad.vaddr)
1675                 free_buf(&pdev->dev, &machine_data->ad,
1676                          sizeof(struct diu_ad) * FSL_AOI_NUM, 8);
1677         if (machine_data->gamma.vaddr)
1678                 free_buf(&pdev->dev, &machine_data->gamma, 768, 32);
1679         if (machine_data->cursor.vaddr)
1680                 free_buf(&pdev->dev, &machine_data->cursor,
1681                          MAX_CURS * MAX_CURS * 2, 32);
1682         if (machine_data->dummy_aoi_virt)
1683                 fsl_diu_free(machine_data->dummy_aoi_virt, 64);
1684         iounmap(machine_data->diu_reg);
1685         for (i = 0; i < ARRAY_SIZE(machine_data->fsl_diu_info); i++)
1686                 if (machine_data->fsl_diu_info[i])
1687                         framebuffer_release(machine_data->fsl_diu_info[i]);
1688         kfree(machine_data);
1689
1690         return 0;
1691 }
1692
1693 #ifndef MODULE
1694 static int __init fsl_diu_setup(char *options)
1695 {
1696         char *opt;
1697         unsigned long val;
1698
1699         if (!options || !*options)
1700                 return 0;
1701
1702         while ((opt = strsep(&options, ",")) != NULL) {
1703                 if (!*opt)
1704                         continue;
1705                 if (!strncmp(opt, "monitor=", 8)) {
1706                         monitor_port = fsl_diu_name_to_port(opt + 8);
1707                 } else if (!strncmp(opt, "bpp=", 4)) {
1708                         if (!strict_strtoul(opt + 4, 10, &val))
1709                                 default_bpp = val;
1710                 } else
1711                         fb_mode = opt;
1712         }
1713
1714         return 0;
1715 }
1716 #endif
1717
1718 static struct of_device_id fsl_diu_match[] = {
1719 #ifdef CONFIG_PPC_MPC512x
1720         {
1721                 .compatible = "fsl,mpc5121-diu",
1722         },
1723 #endif
1724         {
1725                 .compatible = "fsl,diu",
1726         },
1727         {}
1728 };
1729 MODULE_DEVICE_TABLE(of, fsl_diu_match);
1730
1731 static struct platform_driver fsl_diu_driver = {
1732         .driver = {
1733                 .name = "fsl-diu-fb",
1734                 .owner = THIS_MODULE,
1735                 .of_match_table = fsl_diu_match,
1736         },
1737         .probe          = fsl_diu_probe,
1738         .remove         = fsl_diu_remove,
1739         .suspend        = fsl_diu_suspend,
1740         .resume         = fsl_diu_resume,
1741 };
1742
1743 static int __init fsl_diu_init(void)
1744 {
1745 #ifdef CONFIG_NOT_COHERENT_CACHE
1746         struct device_node *np;
1747         const u32 *prop;
1748 #endif
1749         int ret;
1750 #ifndef MODULE
1751         char *option;
1752
1753         /*
1754          * For kernel boot options (in 'video=xxxfb:<options>' format)
1755          */
1756         if (fb_get_options("fslfb", &option))
1757                 return -ENODEV;
1758         fsl_diu_setup(option);
1759 #else
1760         monitor_port = fsl_diu_name_to_port(monitor_string);
1761 #endif
1762         pr_info("Freescale Display Interface Unit (DIU) framebuffer driver\n");
1763
1764 #ifdef CONFIG_NOT_COHERENT_CACHE
1765         np = of_find_node_by_type(NULL, "cpu");
1766         if (!np) {
1767                 pr_err("fsl-diu-fb: can't find 'cpu' device node\n");
1768                 return -ENODEV;
1769         }
1770
1771         prop = of_get_property(np, "d-cache-size", NULL);
1772         if (prop == NULL) {
1773                 pr_err("fsl-diu-fb: missing 'd-cache-size' property' "
1774                        "in 'cpu' node\n");
1775                 of_node_put(np);
1776                 return -ENODEV;
1777         }
1778
1779         /*
1780          * Freescale PLRU requires 13/8 times the cache size to do a proper
1781          * displacement flush
1782          */
1783         coherence_data_size = be32_to_cpup(prop) * 13;
1784         coherence_data_size /= 8;
1785
1786         prop = of_get_property(np, "d-cache-line-size", NULL);
1787         if (prop == NULL) {
1788                 pr_err("fsl-diu-fb: missing 'd-cache-line-size' property' "
1789                        "in 'cpu' node\n");
1790                 of_node_put(np);
1791                 return -ENODEV;
1792         }
1793         d_cache_line_size = be32_to_cpup(prop);
1794
1795         of_node_put(np);
1796         coherence_data = vmalloc(coherence_data_size);
1797         if (!coherence_data)
1798                 return -ENOMEM;
1799 #endif
1800
1801         ret = platform_driver_register(&fsl_diu_driver);
1802         if (ret) {
1803                 pr_err("fsl-diu-fb: failed to register platform driver\n");
1804 #if defined(CONFIG_NOT_COHERENT_CACHE)
1805                 vfree(coherence_data);
1806 #endif
1807         }
1808         return ret;
1809 }
1810
1811 static void __exit fsl_diu_exit(void)
1812 {
1813         platform_driver_unregister(&fsl_diu_driver);
1814 #if defined(CONFIG_NOT_COHERENT_CACHE)
1815         vfree(coherence_data);
1816 #endif
1817 }
1818
1819 module_init(fsl_diu_init);
1820 module_exit(fsl_diu_exit);
1821
1822 MODULE_AUTHOR("York Sun <yorksun@freescale.com>");
1823 MODULE_DESCRIPTION("Freescale DIU framebuffer driver");
1824 MODULE_LICENSE("GPL");
1825
1826 module_param_named(mode, fb_mode, charp, 0);
1827 MODULE_PARM_DESC(mode,
1828         "Specify resolution as \"<xres>x<yres>[-<bpp>][@<refresh>]\" ");
1829 module_param_named(bpp, default_bpp, ulong, 0);
1830 MODULE_PARM_DESC(bpp, "Specify bit-per-pixel if not specified in 'mode'");
1831 module_param_named(monitor, monitor_string, charp, 0);
1832 MODULE_PARM_DESC(monitor, "Specify the monitor port "
1833         "(\"dvi\", \"lvds\", or \"dlvds\") if supported by the platform");
1834