drivers/video/pxa_lcd.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * PXA LCD Controller
   4  *
   5  * (C) Copyright 2001-2002
   6  * Wolfgang Denk, DENX Software Engineering -- wd@denx.de
   7  */
   8
   9 /************************************************************************/
  10 /* ** HEADER FILES                                                      */
  11 /************************************************************************/
  12
  13 #include <common.h>
  14 #include <asm/arch/pxa-regs.h>
  15 #include <asm/io.h>
  16 #include <lcd.h>
  17 #include <linux/types.h>
  18 #include <stdarg.h>
  19 #include <stdio_dev.h>
  20
  21 /* #define DEBUG */
  22
  23 #ifdef CONFIG_LCD
  24
  25 /*----------------------------------------------------------------------*/
  26 /*
  27  * Define panel bpp, LCCR0, LCCR3 and panel_info video struct for
  28  * your display.
  29  */
  30
  31 #ifdef CONFIG_PXA_VGA
  32 /* LCD outputs connected to a video DAC  */
  33 # define LCD_BPP        LCD_COLOR8
  34
  35 /* you have to set lccr0 and lccr3 (including pcd) */
  36 # define REG_LCCR0      0x003008f8
  37 # define REG_LCCR3      0x0300FF01
  38
  39 /* 640x480x16 @ 61 Hz */
  40 vidinfo_t panel_info = {
  41         .vl_col         = 640,
  42         .vl_row         = 480,
  43         .vl_width       = 640,
  44         .vl_height      = 480,
  45         .vl_clkp        = CONFIG_SYS_HIGH,
  46         .vl_oep         = CONFIG_SYS_HIGH,
  47         .vl_hsp         = CONFIG_SYS_HIGH,
  48         .vl_vsp         = CONFIG_SYS_HIGH,
  49         .vl_dp          = CONFIG_SYS_HIGH,
  50         .vl_bpix        = LCD_BPP,
  51         .vl_lbw         = 0,
  52         .vl_splt        = 0,
  53         .vl_clor        = 0,
  54         .vl_tft         = 1,
  55         .vl_hpw         = 40,
  56         .vl_blw         = 56,
  57         .vl_elw         = 56,
  58         .vl_vpw         = 20,
  59         .vl_bfw         = 8,
  60         .vl_efw         = 8,
  61 };
  62 #endif /* CONFIG_PXA_VIDEO */
  63
  64 /*----------------------------------------------------------------------*/
  65 #ifdef CONFIG_SHARP_LM8V31
  66
  67 # define LCD_BPP        LCD_COLOR8
  68 # define LCD_INVERT_COLORS      /* Needed for colors to be correct, but why?    */
  69
  70 /* you have to set lccr0 and lccr3 (including pcd) */
  71 # define REG_LCCR0      0x0030087C
  72 # define REG_LCCR3      0x0340FF08
  73
  74 vidinfo_t panel_info = {
  75         .vl_col         = 640,
  76         .vl_row         = 480,
  77         .vl_width       = 157,
  78         .vl_height      = 118,
  79         .vl_clkp        = CONFIG_SYS_HIGH,
  80         .vl_oep         = CONFIG_SYS_HIGH,
  81         .vl_hsp         = CONFIG_SYS_HIGH,
  82         .vl_vsp         = CONFIG_SYS_HIGH,
  83         .vl_dp          = CONFIG_SYS_HIGH,
  84         .vl_bpix        = LCD_BPP,
  85         .vl_lbw         = 0,
  86         .vl_splt        = 1,
  87         .vl_clor        = 1,
  88         .vl_tft         = 0,
  89         .vl_hpw         = 1,
  90         .vl_blw         = 3,
  91         .vl_elw         = 3,
  92         .vl_vpw         = 1,
  93         .vl_bfw         = 0,
  94         .vl_efw         = 0,
  95 };
  96 #endif /* CONFIG_SHARP_LM8V31 */
  97 /*----------------------------------------------------------------------*/
  98 #ifdef CONFIG_VOIPAC_LCD
  99
 100 # define LCD_BPP        LCD_COLOR8
 101 # define LCD_INVERT_COLORS
 102
 103 /* you have to set lccr0 and lccr3 (including pcd) */
 104 # define REG_LCCR0      0x043008f8
 105 # define REG_LCCR3      0x0340FF08
 106
 107 vidinfo_t panel_info = {
 108         .vl_col         = 640,
 109         .vl_row         = 480,
 110         .vl_width       = 157,
 111         .vl_height      = 118,
 112         .vl_clkp        = CONFIG_SYS_HIGH,
 113         .vl_oep         = CONFIG_SYS_HIGH,
 114         .vl_hsp         = CONFIG_SYS_HIGH,
 115         .vl_vsp         = CONFIG_SYS_HIGH,
 116         .vl_dp          = CONFIG_SYS_HIGH,
 117         .vl_bpix        = LCD_BPP,
 118         .vl_lbw         = 0,
 119         .vl_splt        = 1,
 120         .vl_clor        = 1,
 121         .vl_tft         = 1,
 122         .vl_hpw         = 32,
 123         .vl_blw         = 144,
 124         .vl_elw         = 32,
 125         .vl_vpw         = 2,
 126         .vl_bfw         = 13,
 127         .vl_efw         = 30,
 128 };
 129 #endif /* CONFIG_VOIPAC_LCD */
 130
 131 /*----------------------------------------------------------------------*/
 132 #ifdef CONFIG_HITACHI_SX14
 133 /* Hitachi SX14Q004-ZZA color STN LCD */
 134 #define LCD_BPP         LCD_COLOR8
 135
 136 /* you have to set lccr0 and lccr3 (including pcd) */
 137 #define REG_LCCR0       0x00301079
 138 #define REG_LCCR3       0x0340FF20
 139
 140 vidinfo_t panel_info = {
 141         .vl_col         = 320,
 142         .vl_row         = 240,
 143         .vl_width       = 167,
 144         .vl_height      = 109,
 145         .vl_clkp        = CONFIG_SYS_HIGH,
 146         .vl_oep         = CONFIG_SYS_HIGH,
 147         .vl_hsp         = CONFIG_SYS_HIGH,
 148         .vl_vsp         = CONFIG_SYS_HIGH,
 149         .vl_dp          = CONFIG_SYS_HIGH,
 150         .vl_bpix        = LCD_BPP,
 151         .vl_lbw         = 1,
 152         .vl_splt        = 0,
 153         .vl_clor        = 1,
 154         .vl_tft         = 0,
 155         .vl_hpw         = 1,
 156         .vl_blw         = 1,
 157         .vl_elw         = 1,
 158         .vl_vpw         = 7,
 159         .vl_bfw         = 0,
 160         .vl_efw         = 0,
 161 };
 162 #endif /* CONFIG_HITACHI_SX14 */
 163
 164 /*----------------------------------------------------------------------*/
 165 #ifdef CONFIG_LMS283GF05
 166
 167 # define LCD_BPP        LCD_COLOR8
 168 /*# define LCD_INVERT_COLORS*/
 169
 170 /* you have to set lccr0 and lccr3 (including pcd) */
 171 # define REG_LCCR0      0x043008f8
 172 # define REG_LCCR3      0x03b00009
 173
 174 vidinfo_t panel_info = {
 175         .vl_col         = 240,
 176         .vl_row         = 320,
 177         .vl_rot         = 3,
 178         .vl_width       = 240,
 179         .vl_height      = 320,
 180         .vl_clkp        = CONFIG_SYS_HIGH,
 181         .vl_oep         = CONFIG_SYS_LOW,
 182         .vl_hsp         = CONFIG_SYS_LOW,
 183         .vl_vsp         = CONFIG_SYS_LOW,
 184         .vl_dp          = CONFIG_SYS_HIGH,
 185         .vl_bpix        = LCD_BPP,
 186         .vl_lbw         = 0,
 187         .vl_splt        = 1,
 188         .vl_clor        = 1,
 189         .vl_tft         = 1,
 190         .vl_hpw         = 4,
 191         .vl_blw         = 4,
 192         .vl_elw         = 8,
 193         .vl_vpw         = 4,
 194         .vl_bfw         = 4,
 195         .vl_efw         = 8,
 196 };
 197 #endif /* CONFIG_LMS283GF05 */
 198
 199 /*----------------------------------------------------------------------*/
 200
 201 #ifdef CONFIG_ACX517AKN
 202
 203 # define LCD_BPP        LCD_COLOR8
 204
 205 /* you have to set lccr0 and lccr3 (including pcd) */
 206 # define REG_LCCR0      0x003008f9
 207 # define REG_LCCR3      0x03700006
 208
 209 vidinfo_t panel_info = {
 210         .vl_col         = 320,
 211         .vl_row         = 320,
 212         .vl_width       = 320,
 213         .vl_height      = 320,
 214         .vl_clkp        = CONFIG_SYS_HIGH,
 215         .vl_oep         = CONFIG_SYS_LOW,
 216         .vl_hsp         = CONFIG_SYS_LOW,
 217         .vl_vsp         = CONFIG_SYS_LOW,
 218         .vl_dp          = CONFIG_SYS_HIGH,
 219         .vl_bpix        = LCD_BPP,
 220         .vl_lbw         = 0,
 221         .vl_splt        = 1,
 222         .vl_clor        = 1,
 223         .vl_tft         = 1,
 224         .vl_hpw         = 0x04,
 225         .vl_blw         = 0x1c,
 226         .vl_elw         = 0x08,
 227         .vl_vpw         = 0x01,
 228         .vl_bfw         = 0x07,
 229         .vl_efw         = 0x08,
 230 };
 231 #endif /* CONFIG_ACX517AKN */
 232
 233 #ifdef CONFIG_ACX544AKN
 234
 235 # define LCD_BPP        LCD_COLOR16
 236
 237 /* you have to set lccr0 and lccr3 (including pcd) */
 238 # define REG_LCCR0      0x003008f9
 239 # define REG_LCCR3      0x04700007 /* 16bpp */
 240
 241 vidinfo_t panel_info = {
 242         .vl_col         = 320,
 243         .vl_row         = 320,
 244         .vl_width       = 320,
 245         .vl_height      = 320,
 246         .vl_clkp        = CONFIG_SYS_LOW,
 247         .vl_oep         = CONFIG_SYS_LOW,
 248         .vl_hsp         = CONFIG_SYS_LOW,
 249         .vl_vsp         = CONFIG_SYS_LOW,
 250         .vl_dp          = CONFIG_SYS_LOW,
 251         .vl_bpix        = LCD_BPP,
 252         .vl_lbw         = 0,
 253         .vl_splt        = 0,
 254         .vl_clor        = 1,
 255         .vl_tft         = 1,
 256         .vl_hpw         = 0x05,
 257         .vl_blw         = 0x13,
 258         .vl_elw         = 0x08,
 259         .vl_vpw         = 0x02,
 260         .vl_bfw         = 0x07,
 261         .vl_efw         = 0x05,
 262 };
 263 #endif /* CONFIG_ACX544AKN */
 264
 265 /*----------------------------------------------------------------------*/
 266
 267 #ifdef CONFIG_LQ038J7DH53
 268
 269 # define LCD_BPP        LCD_COLOR8
 270
 271 /* you have to set lccr0 and lccr3 (including pcd) */
 272 # define REG_LCCR0      0x003008f9
 273 # define REG_LCCR3      0x03700004
 274
 275 vidinfo_t panel_info = {
 276         .vl_col         = 320,
 277         .vl_row         = 480,
 278         .vl_width       = 320,
 279         .vl_height      = 480,
 280         .vl_clkp        = CONFIG_SYS_HIGH,
 281         .vl_oep         = CONFIG_SYS_LOW,
 282         .vl_hsp         = CONFIG_SYS_LOW,
 283         .vl_vsp         = CONFIG_SYS_LOW,
 284         .vl_dp          = CONFIG_SYS_HIGH,
 285         .vl_bpix        = LCD_BPP,
 286         .vl_lbw         = 0,
 287         .vl_splt        = 1,
 288         .vl_clor        = 1,
 289         .vl_tft         = 1,
 290         .vl_hpw         = 0x04,
 291         .vl_blw         = 0x20,
 292         .vl_elw         = 0x01,
 293         .vl_vpw         = 0x01,
 294         .vl_bfw         = 0x04,
 295         .vl_efw         = 0x01,
 296 };
 297 #endif /* CONFIG_ACX517AKN */
 298
 299 /*----------------------------------------------------------------------*/
 300
 301 #ifdef CONFIG_LITTLETON_LCD
 302 # define LCD_BPP        LCD_COLOR8
 303
 304 /* you have to set lccr0 and lccr3 (including pcd) */
 305 # define REG_LCCR0      0x003008f8
 306 # define REG_LCCR3      0x0300FF04
 307
 308 vidinfo_t panel_info = {
 309         .vl_col         = 480,
 310         .vl_row         = 640,
 311         .vl_width       = 480,
 312         .vl_height      = 640,
 313         .vl_clkp        = CONFIG_SYS_HIGH,
 314         .vl_oep         = CONFIG_SYS_HIGH,
 315         .vl_hsp         = CONFIG_SYS_HIGH,
 316         .vl_vsp         = CONFIG_SYS_HIGH,
 317         .vl_dp          = CONFIG_SYS_HIGH,
 318         .vl_bpix        = LCD_BPP,
 319         .vl_lbw         = 0,
 320         .vl_splt        = 0,
 321         .vl_clor        = 0,
 322         .vl_tft         = 1,
 323         .vl_hpw         = 9,
 324         .vl_blw         = 8,
 325         .vl_elw         = 24,
 326         .vl_vpw         = 2,
 327         .vl_bfw         = 2,
 328         .vl_efw         = 4,
 329 };
 330 #endif /* CONFIG_LITTLETON_LCD */
 331
 332 /*----------------------------------------------------------------------*/
 333
 334 static int pxafb_init_mem (void *lcdbase, vidinfo_t *vid);
 335 static void pxafb_setup_gpio (vidinfo_t *vid);
 336 static void pxafb_enable_controller (vidinfo_t *vid);
 337 static int pxafb_init (vidinfo_t *vid);
 338
 339 /************************************************************************/
 340 /* ---------------  PXA chipset specific functions  ------------------- */
 341 /************************************************************************/
 342
 343 ushort *configuration_get_cmap(void)
 344 {
 345         struct pxafb_info *fbi = &panel_info.pxa;
 346         return (ushort *)fbi->palette;
 347 }
 348
 349 void lcd_ctrl_init (void *lcdbase)
 350 {
 351         pxafb_init_mem(lcdbase, &panel_info);
 352         pxafb_init(&panel_info);
 353         pxafb_setup_gpio(&panel_info);
 354         pxafb_enable_controller(&panel_info);
 355 }
 356
 357 /*----------------------------------------------------------------------*/
 358 #if LCD_BPP == LCD_COLOR8
 359 void
 360 lcd_setcolreg (ushort regno, ushort red, ushort green, ushort blue)
 361 {
 362         struct pxafb_info *fbi = &panel_info.pxa;
 363         unsigned short *palette = (unsigned short *)fbi->palette;
 364         u_int val;
 365
 366         if (regno < fbi->palette_size) {
 367                 val = ((red << 8) & 0xf800);
 368                 val |= ((green << 4) & 0x07e0);
 369                 val |= (blue & 0x001f);
 370
 371 #ifdef LCD_INVERT_COLORS
 372                 palette[regno] = ~val;
 373 #else
 374                 palette[regno] = val;
 375 #endif
 376         }
 377
 378         debug ("setcolreg: reg %2d @ %p: R=%02X G=%02X B=%02X => %04X\n",
 379                 regno, &palette[regno],
 380                 red, green, blue,
 381                 palette[regno]);
 382 }
 383 #endif /* LCD_COLOR8 */
 384
 385 /*----------------------------------------------------------------------*/
 386 __weak void lcd_enable(void)
 387 {
 388 }
 389
 390 /************************************************************************/
 391 /* ** PXA255 specific routines                                          */
 392 /************************************************************************/
 393
 394 /*
 395  * Calculate fb size for VIDEOLFB_ATAG. Size returned contains fb,
 396  * descriptors and palette areas.
 397  */
 398 ulong calc_fbsize (void)
 399 {
 400         ulong size;
 401         int line_length = (panel_info.vl_col * NBITS (panel_info.vl_bpix)) / 8;
 402
 403         size = line_length * panel_info.vl_row;
 404         size += PAGE_SIZE;
 405
 406         return size;
 407 }
 408
 409 static int pxafb_init_mem (void *lcdbase, vidinfo_t *vid)
 410 {
 411         u_long palette_mem_size;
 412         struct pxafb_info *fbi = &vid->pxa;
 413         int fb_size = vid->vl_row * (vid->vl_col * NBITS (vid->vl_bpix)) / 8;
 414
 415         fbi->screen = (u_long)lcdbase;
 416
 417         fbi->palette_size = NBITS(vid->vl_bpix) == 8 ? 256 : 16;
 418         palette_mem_size = fbi->palette_size * sizeof(u16);
 419
 420         debug("palette_mem_size = 0x%08lx\n", (u_long) palette_mem_size);
 421         /* locate palette and descs at end of page following fb */
 422         fbi->palette = (u_long)lcdbase + fb_size + PAGE_SIZE - palette_mem_size;
 423
 424         return 0;
 425 }
 426 #ifdef  CONFIG_CPU_MONAHANS
 427 static inline void pxafb_setup_gpio (vidinfo_t *vid) {}
 428 #else
 429 static void pxafb_setup_gpio (vidinfo_t *vid)
 430 {
 431         u_long lccr0;
 432
 433         /*
 434          * setup is based on type of panel supported
 435          */
 436
 437         lccr0 = vid->pxa.reg_lccr0;
 438
 439         /* 4 bit interface */
 440         if ((lccr0 & LCCR0_CMS) && (lccr0 & LCCR0_SDS) && !(lccr0 & LCCR0_DPD))
 441         {
 442                 debug("Setting GPIO for 4 bit data\n");
 443                 /* bits 58-61 */
 444                 writel(readl(GPDR1) | (0xf << 26), GPDR1);
 445                 writel((readl(GAFR1_U) & ~(0xff << 20)) | (0xaa << 20),
 446                         GAFR1_U);
 447
 448                 /* bits 74-77 */
 449                 writel(readl(GPDR2) | (0xf << 10), GPDR2);
 450                 writel((readl(GAFR2_L) & ~(0xff << 20)) | (0xaa << 20),
 451                         GAFR2_L);
 452         }
 453
 454         /* 8 bit interface */
 455         else if (((lccr0 & LCCR0_CMS) && ((lccr0 & LCCR0_SDS) || (lccr0 & LCCR0_DPD))) ||
 456                 (!(lccr0 & LCCR0_CMS) && !(lccr0 & LCCR0_PAS) && !(lccr0 & LCCR0_SDS)))
 457         {
 458                 debug("Setting GPIO for 8 bit data\n");
 459                 /* bits 58-65 */
 460                 writel(readl(GPDR1) | (0x3f << 26), GPDR1);
 461                 writel(readl(GPDR2) | (0x3), GPDR2);
 462
 463                 writel((readl(GAFR1_U) & ~(0xfff << 20)) | (0xaaa << 20),
 464                         GAFR1_U);
 465                 writel((readl(GAFR2_L) & ~0xf) | (0xa), GAFR2_L);
 466
 467                 /* bits 74-77 */
 468                 writel(readl(GPDR2) | (0xf << 10), GPDR2);
 469                 writel((readl(GAFR2_L) & ~(0xff << 20)) | (0xaa << 20),
 470                         GAFR2_L);
 471         }
 472
 473         /* 16 bit interface */
 474         else if (!(lccr0 & LCCR0_CMS) && ((lccr0 & LCCR0_SDS) || (lccr0 & LCCR0_PAS)))
 475         {
 476                 debug("Setting GPIO for 16 bit data\n");
 477                 /* bits 58-77 */
 478                 writel(readl(GPDR1) | (0x3f << 26), GPDR1);
 479                 writel(readl(GPDR2) | 0x00003fff, GPDR2);
 480
 481                 writel((readl(GAFR1_U) & ~(0xfff << 20)) | (0xaaa << 20),
 482                         GAFR1_U);
 483                 writel((readl(GAFR2_L) & 0xf0000000) | 0x0aaaaaaa, GAFR2_L);
 484         }
 485         else
 486         {
 487                 printf("pxafb_setup_gpio: unable to determine bits per pixel\n");
 488         }
 489 }
 490 #endif
 491
 492 static void pxafb_enable_controller (vidinfo_t *vid)
 493 {
 494         debug("Enabling LCD controller\n");
 495
 496         /* Sequence from 11.7.10 */
 497         writel(vid->pxa.reg_lccr3, LCCR3);
 498         writel(vid->pxa.reg_lccr2, LCCR2);
 499         writel(vid->pxa.reg_lccr1, LCCR1);
 500         writel(vid->pxa.reg_lccr0 & ~LCCR0_ENB, LCCR0);
 501         writel(vid->pxa.fdadr0, FDADR0);
 502         writel(vid->pxa.fdadr1, FDADR1);
 503         writel(readl(LCCR0) | LCCR0_ENB, LCCR0);
 504
 505 #ifdef  CONFIG_CPU_MONAHANS
 506         writel(readl(CKENA) | CKENA_1_LCD, CKENA);
 507 #else
 508         writel(readl(CKEN) | CKEN16_LCD, CKEN);
 509 #endif
 510
 511         debug("FDADR0 = 0x%08x\n", readl(FDADR0));
 512         debug("FDADR1 = 0x%08x\n", readl(FDADR1));
 513         debug("LCCR0 = 0x%08x\n", readl(LCCR0));
 514         debug("LCCR1 = 0x%08x\n", readl(LCCR1));
 515         debug("LCCR2 = 0x%08x\n", readl(LCCR2));
 516         debug("LCCR3 = 0x%08x\n", readl(LCCR3));
 517 }
 518
 519 static int pxafb_init (vidinfo_t *vid)
 520 {
 521         struct pxafb_info *fbi = &vid->pxa;
 522
 523         debug("Configuring PXA LCD\n");
 524
 525         fbi->reg_lccr0 = REG_LCCR0;
 526         fbi->reg_lccr3 = REG_LCCR3;
 527
 528         debug("vid: vl_col=%d hslen=%d lm=%d rm=%d\n",
 529                 vid->vl_col, vid->vl_hpw,
 530                 vid->vl_blw, vid->vl_elw);
 531         debug("vid: vl_row=%d vslen=%d um=%d bm=%d\n",
 532                 vid->vl_row, vid->vl_vpw,
 533                 vid->vl_bfw, vid->vl_efw);
 534
 535         fbi->reg_lccr1 =
 536                 LCCR1_DisWdth(vid->vl_col) +
 537                 LCCR1_HorSnchWdth(vid->vl_hpw) +
 538                 LCCR1_BegLnDel(vid->vl_blw) +
 539                 LCCR1_EndLnDel(vid->vl_elw);
 540
 541         fbi->reg_lccr2 =
 542                 LCCR2_DisHght(vid->vl_row) +
 543                 LCCR2_VrtSnchWdth(vid->vl_vpw) +
 544                 LCCR2_BegFrmDel(vid->vl_bfw) +
 545                 LCCR2_EndFrmDel(vid->vl_efw);
 546
 547         fbi->reg_lccr3 = REG_LCCR3 & ~(LCCR3_HSP | LCCR3_VSP);
 548         fbi->reg_lccr3 |= (vid->vl_hsp ? LCCR3_HorSnchL : LCCR3_HorSnchH)
 549                         | (vid->vl_vsp ? LCCR3_VrtSnchL : LCCR3_VrtSnchH);
 550
 551
 552         /* setup dma descriptors */
 553         fbi->dmadesc_fblow = (struct pxafb_dma_descriptor *)((unsigned int)fbi->palette - 3*16);
 554         fbi->dmadesc_fbhigh = (struct pxafb_dma_descriptor *)((unsigned int)fbi->palette - 2*16);
 555         fbi->dmadesc_palette = (struct pxafb_dma_descriptor *)((unsigned int)fbi->palette - 1*16);
 556
 557         #define BYTES_PER_PANEL ((fbi->reg_lccr0 & LCCR0_SDS) ? \
 558                 (vid->vl_col * vid->vl_row * NBITS(vid->vl_bpix) / 8 / 2) : \
 559                 (vid->vl_col * vid->vl_row * NBITS(vid->vl_bpix) / 8))
 560
 561         /* populate descriptors */
 562         fbi->dmadesc_fblow->fdadr = (u_long)fbi->dmadesc_fblow;
 563         fbi->dmadesc_fblow->fsadr = fbi->screen + BYTES_PER_PANEL;
 564         fbi->dmadesc_fblow->fidr  = 0;
 565         fbi->dmadesc_fblow->ldcmd = BYTES_PER_PANEL;
 566
 567         fbi->fdadr1 = (u_long)fbi->dmadesc_fblow; /* only used in dual-panel mode */
 568
 569         fbi->dmadesc_fbhigh->fsadr = fbi->screen;
 570         fbi->dmadesc_fbhigh->fidr = 0;
 571         fbi->dmadesc_fbhigh->ldcmd = BYTES_PER_PANEL;
 572
 573         fbi->dmadesc_palette->fsadr = fbi->palette;
 574         fbi->dmadesc_palette->fidr  = 0;
 575         fbi->dmadesc_palette->ldcmd = (fbi->palette_size * 2) | LDCMD_PAL;
 576
 577         if( NBITS(vid->vl_bpix) < 12)
 578         {
 579                 /* assume any mode with <12 bpp is palette driven */
 580                 fbi->dmadesc_palette->fdadr = (u_long)fbi->dmadesc_fbhigh;
 581                 fbi->dmadesc_fbhigh->fdadr = (u_long)fbi->dmadesc_palette;
 582                 /* flips back and forth between pal and fbhigh */
 583                 fbi->fdadr0 = (u_long)fbi->dmadesc_palette;
 584         }
 585         else
 586         {
 587                 /* palette shouldn't be loaded in true-color mode */
 588                 fbi->dmadesc_fbhigh->fdadr = (u_long)fbi->dmadesc_fbhigh;
 589                 fbi->fdadr0 = (u_long)fbi->dmadesc_fbhigh; /* no pal just fbhigh */
 590         }
 591
 592         debug("fbi->dmadesc_fblow = 0x%lx\n", (u_long)fbi->dmadesc_fblow);
 593         debug("fbi->dmadesc_fbhigh = 0x%lx\n", (u_long)fbi->dmadesc_fbhigh);
 594         debug("fbi->dmadesc_palette = 0x%lx\n", (u_long)fbi->dmadesc_palette);
 595
 596         debug("fbi->dmadesc_fblow->fdadr = 0x%lx\n", fbi->dmadesc_fblow->fdadr);
 597         debug("fbi->dmadesc_fbhigh->fdadr = 0x%lx\n", fbi->dmadesc_fbhigh->fdadr);
 598         debug("fbi->dmadesc_palette->fdadr = 0x%lx\n", fbi->dmadesc_palette->fdadr);
 599
 600         debug("fbi->dmadesc_fblow->fsadr = 0x%lx\n", fbi->dmadesc_fblow->fsadr);
 601         debug("fbi->dmadesc_fbhigh->fsadr = 0x%lx\n", fbi->dmadesc_fbhigh->fsadr);
 602         debug("fbi->dmadesc_palette->fsadr = 0x%lx\n", fbi->dmadesc_palette->fsadr);
 603
 604         debug("fbi->dmadesc_fblow->ldcmd = 0x%lx\n", fbi->dmadesc_fblow->ldcmd);
 605         debug("fbi->dmadesc_fbhigh->ldcmd = 0x%lx\n", fbi->dmadesc_fbhigh->ldcmd);
 606         debug("fbi->dmadesc_palette->ldcmd = 0x%lx\n", fbi->dmadesc_palette->ldcmd);
 607
 608         return 0;
 609 }
 610
 611 /************************************************************************/
 612 /************************************************************************/
 613
 614 #endif /* CONFIG_LCD */