drivers/video/via/lcd.c

   1 /*
   2  * Copyright 1998-2008 VIA Technologies, Inc. All Rights Reserved.
   3  * Copyright 2001-2008 S3 Graphics, Inc. All Rights Reserved.
   4
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU General Public
   7  * License as published by the Free Software Foundation;
   8  * either version 2, or (at your option) any later version.
   9
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTIES OR REPRESENTATIONS; without even
  12  * the implied warranty of MERCHANTABILITY or FITNESS FOR
  13  * A PARTICULAR PURPOSE.See the GNU General Public License
  14  * for more details.
  15
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc.,
  19  * 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  20  */
  21 #include <linux/via-core.h>
  22 #include <linux/via_i2c.h>
  23 #include "global.h"
  24
  25 #define viafb_compact_res(x, y) (((x)<<16)|(y))
  26
  27 /* CLE266 Software Power Sequence */
  28 /* {Mask}, {Data}, {Delay} */
  29 static const int PowerSequenceOn[3][3] = {
  30         {0x10, 0x08, 0x06}, {0x10, 0x08, 0x06}, {0x19, 0x1FE, 0x01}
  31 };
  32 static const int PowerSequenceOff[3][3] = {
  33         {0x06, 0x08, 0x10}, {0x00, 0x00, 0x00}, {0xD2, 0x19, 0x01}
  34 };
  35
  36 static struct _lcd_scaling_factor lcd_scaling_factor = {
  37         /* LCD Horizontal Scaling Factor Register */
  38         {LCD_HOR_SCALING_FACTOR_REG_NUM,
  39          {{CR9F, 0, 1}, {CR77, 0, 7}, {CR79, 4, 5} } },
  40         /* LCD Vertical Scaling Factor Register */
  41         {LCD_VER_SCALING_FACTOR_REG_NUM,
  42          {{CR79, 3, 3}, {CR78, 0, 7}, {CR79, 6, 7} } }
  43 };
  44 static struct _lcd_scaling_factor lcd_scaling_factor_CLE = {
  45         /* LCD Horizontal Scaling Factor Register */
  46         {LCD_HOR_SCALING_FACTOR_REG_NUM_CLE, {{CR77, 0, 7}, {CR79, 4, 5} } },
  47         /* LCD Vertical Scaling Factor Register */
  48         {LCD_VER_SCALING_FACTOR_REG_NUM_CLE, {{CR78, 0, 7}, {CR79, 6, 7} } }
  49 };
  50
  51 static bool lvds_identify_integratedlvds(void);
  52 static void __devinit fp_id_to_vindex(int panel_id);
  53 static int lvds_register_read(int index);
  54 static void load_lcd_scaling(int set_hres, int set_vres, int panel_hres,
  55                       int panel_vres);
  56 static void via_pitch_alignment_patch_lcd(
  57         struct lvds_setting_information *plvds_setting_info,
  58                                    struct lvds_chip_information
  59                                    *plvds_chip_info);
  60 static void lcd_patch_skew_dvp0(struct lvds_setting_information
  61                          *plvds_setting_info,
  62                          struct lvds_chip_information *plvds_chip_info);
  63 static void lcd_patch_skew_dvp1(struct lvds_setting_information
  64                          *plvds_setting_info,
  65                          struct lvds_chip_information *plvds_chip_info);
  66 static void lcd_patch_skew(struct lvds_setting_information
  67         *plvds_setting_info, struct lvds_chip_information *plvds_chip_info);
  68
  69 static void integrated_lvds_disable(struct lvds_setting_information
  70                              *plvds_setting_info,
  71                              struct lvds_chip_information *plvds_chip_info);
  72 static void integrated_lvds_enable(struct lvds_setting_information
  73                             *plvds_setting_info,
  74                             struct lvds_chip_information *plvds_chip_info);
  75 static void lcd_powersequence_off(void);
  76 static void lcd_powersequence_on(void);
  77 static void fill_lcd_format(void);
  78 static void check_diport_of_integrated_lvds(
  79         struct lvds_chip_information *plvds_chip_info,
  80                                      struct lvds_setting_information
  81                                      *plvds_setting_info);
  82 static struct display_timing lcd_centering_timging(struct display_timing
  83                                             mode_crt_reg,
  84                                            struct display_timing panel_crt_reg);
  85
  86 static inline bool check_lvds_chip(int device_id_subaddr, int device_id)
  87 {
  88         return lvds_register_read(device_id_subaddr) == device_id;
  89 }
  90
  91 void __devinit viafb_init_lcd_size(void)
  92 {
  93         DEBUG_MSG(KERN_INFO "viafb_init_lcd_size()\n");
  94
  95         fp_id_to_vindex(viafb_lcd_panel_id);
  96         viaparinfo->lvds_setting_info2->lcd_panel_hres =
  97                 viaparinfo->lvds_setting_info->lcd_panel_hres;
  98         viaparinfo->lvds_setting_info2->lcd_panel_vres =
  99                 viaparinfo->lvds_setting_info->lcd_panel_vres;
 100         viaparinfo->lvds_setting_info2->device_lcd_dualedge =
 101             viaparinfo->lvds_setting_info->device_lcd_dualedge;
 102         viaparinfo->lvds_setting_info2->LCDDithering =
 103                 viaparinfo->lvds_setting_info->LCDDithering;
 104 }
 105
 106 static bool lvds_identify_integratedlvds(void)
 107 {
 108         if (viafb_display_hardware_layout == HW_LAYOUT_LCD_EXTERNAL_LCD2) {
 109                 /* Two dual channel LCD (Internal LVDS + External LVDS): */
 110                 /* If we have an external LVDS, such as VT1636, we should
 111                    have its chip ID already. */
 112                 if (viaparinfo->chip_info->lvds_chip_info.lvds_chip_name) {
 113                         viaparinfo->chip_info->lvds_chip_info2.lvds_chip_name =
 114                             INTEGRATED_LVDS;
 115                         DEBUG_MSG(KERN_INFO "Support two dual channel LVDS! "
 116                                   "(Internal LVDS + External LVDS)\n");
 117                 } else {
 118                         viaparinfo->chip_info->lvds_chip_info.lvds_chip_name =
 119                             INTEGRATED_LVDS;
 120                         DEBUG_MSG(KERN_INFO "Not found external LVDS, "
 121                                   "so can't support two dual channel LVDS!\n");
 122                 }
 123         } else if (viafb_display_hardware_layout == HW_LAYOUT_LCD1_LCD2) {
 124                 /* Two single channel LCD (Internal LVDS + Internal LVDS): */
 125                 viaparinfo->chip_info->lvds_chip_info.lvds_chip_name =
 126                 INTEGRATED_LVDS;
 127                 viaparinfo->chip_info->lvds_chip_info2.lvds_chip_name =
 128                         INTEGRATED_LVDS;
 129                 DEBUG_MSG(KERN_INFO "Support two single channel LVDS! "
 130                           "(Internal LVDS + Internal LVDS)\n");
 131         } else if (viafb_display_hardware_layout != HW_LAYOUT_DVI_ONLY) {
 132                 /* If we have found external LVDS, just use it,
 133                    otherwise, we will use internal LVDS as default. */
 134                 if (!viaparinfo->chip_info->lvds_chip_info.lvds_chip_name) {
 135                         viaparinfo->chip_info->lvds_chip_info.lvds_chip_name =
 136                             INTEGRATED_LVDS;
 137                         DEBUG_MSG(KERN_INFO "Found Integrated LVDS!\n");
 138                 }
 139         } else {
 140                 viaparinfo->chip_info->lvds_chip_info.lvds_chip_name =
 141                         NON_LVDS_TRANSMITTER;
 142                 DEBUG_MSG(KERN_INFO "Do not support LVDS!\n");
 143                 return false;
 144         }
 145
 146         return true;
 147 }
 148
 149 bool __devinit viafb_lvds_trasmitter_identify(void)
 150 {
 151         if (viafb_lvds_identify_vt1636(VIA_PORT_31)) {
 152                 viaparinfo->chip_info->lvds_chip_info.i2c_port = VIA_PORT_31;
 153                 DEBUG_MSG(KERN_INFO
 154                           "Found VIA VT1636 LVDS on port i2c 0x31\n");
 155         } else {
 156                 if (viafb_lvds_identify_vt1636(VIA_PORT_2C)) {
 157                         viaparinfo->chip_info->lvds_chip_info.i2c_port =
 158                                 VIA_PORT_2C;
 159                         DEBUG_MSG(KERN_INFO
 160                                   "Found VIA VT1636 LVDS on port gpio 0x2c\n");
 161                 }
 162         }
 163
 164         if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CX700)
 165                 lvds_identify_integratedlvds();
 166
 167         if (viaparinfo->chip_info->lvds_chip_info.lvds_chip_name)
 168                 return true;
 169         /* Check for VT1631: */
 170         viaparinfo->chip_info->lvds_chip_info.lvds_chip_name = VT1631_LVDS;
 171         viaparinfo->chip_info->lvds_chip_info.lvds_chip_slave_addr =
 172                 VT1631_LVDS_I2C_ADDR;
 173
 174         if (check_lvds_chip(VT1631_DEVICE_ID_REG, VT1631_DEVICE_ID)) {
 175                 DEBUG_MSG(KERN_INFO "\n VT1631 LVDS ! \n");
 176                 DEBUG_MSG(KERN_INFO "\n %2d",
 177                           viaparinfo->chip_info->lvds_chip_info.lvds_chip_name);
 178                 DEBUG_MSG(KERN_INFO "\n %2d",
 179                           viaparinfo->chip_info->lvds_chip_info.lvds_chip_name);
 180                 return true;
 181         }
 182
 183         viaparinfo->chip_info->lvds_chip_info.lvds_chip_name =
 184                 NON_LVDS_TRANSMITTER;
 185         viaparinfo->chip_info->lvds_chip_info.lvds_chip_slave_addr =
 186                 VT1631_LVDS_I2C_ADDR;
 187         return false;
 188 }
 189
 190 static void __devinit fp_id_to_vindex(int panel_id)
 191 {
 192         DEBUG_MSG(KERN_INFO "fp_get_panel_id()\n");
 193
 194         if (panel_id > LCD_PANEL_ID_MAXIMUM)
 195                 viafb_lcd_panel_id = panel_id =
 196                 viafb_read_reg(VIACR, CR3F) & 0x0F;
 197
 198         switch (panel_id) {
 199         case 0x0:
 200                 viaparinfo->lvds_setting_info->lcd_panel_hres = 640;
 201                 viaparinfo->lvds_setting_info->lcd_panel_vres = 480;
 202                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
 203                 viaparinfo->lvds_setting_info->LCDDithering = 1;
 204                 break;
 205         case 0x1:
 206                 viaparinfo->lvds_setting_info->lcd_panel_hres = 800;
 207                 viaparinfo->lvds_setting_info->lcd_panel_vres = 600;
 208                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
 209                 viaparinfo->lvds_setting_info->LCDDithering = 1;
 210                 break;
 211         case 0x2:
 212                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1024;
 213                 viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
 214                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
 215                 viaparinfo->lvds_setting_info->LCDDithering = 1;
 216                 break;
 217         case 0x3:
 218                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1280;
 219                 viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
 220                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
 221                 viaparinfo->lvds_setting_info->LCDDithering = 1;
 222                 break;
 223         case 0x4:
 224                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1280;
 225                 viaparinfo->lvds_setting_info->lcd_panel_vres = 1024;
 226                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
 227                 viaparinfo->lvds_setting_info->LCDDithering = 1;
 228                 break;
 229         case 0x5:
 230                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1400;
 231                 viaparinfo->lvds_setting_info->lcd_panel_vres = 1050;
 232                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
 233                 viaparinfo->lvds_setting_info->LCDDithering = 1;
 234                 break;
 235         case 0x6:
 236                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1600;
 237                 viaparinfo->lvds_setting_info->lcd_panel_vres = 1200;
 238                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
 239                 viaparinfo->lvds_setting_info->LCDDithering = 1;
 240                 break;
 241         case 0x8:
 242                 viaparinfo->lvds_setting_info->lcd_panel_hres = 800;
 243                 viaparinfo->lvds_setting_info->lcd_panel_vres = 480;
 244                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
 245                 viaparinfo->lvds_setting_info->LCDDithering = 1;
 246                 break;
 247         case 0x9:
 248                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1024;
 249                 viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
 250                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
 251                 viaparinfo->lvds_setting_info->LCDDithering = 1;
 252                 break;
 253         case 0xA:
 254                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1024;
 255                 viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
 256                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
 257                 viaparinfo->lvds_setting_info->LCDDithering = 0;
 258                 break;
 259         case 0xB:
 260                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1024;
 261                 viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
 262                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
 263                 viaparinfo->lvds_setting_info->LCDDithering = 0;
 264                 break;
 265         case 0xC:
 266                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1280;
 267                 viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
 268                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
 269                 viaparinfo->lvds_setting_info->LCDDithering = 0;
 270                 break;
 271         case 0xD:
 272                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1280;
 273                 viaparinfo->lvds_setting_info->lcd_panel_vres = 1024;
 274                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
 275                 viaparinfo->lvds_setting_info->LCDDithering = 0;
 276                 break;
 277         case 0xE:
 278                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1400;
 279                 viaparinfo->lvds_setting_info->lcd_panel_vres = 1050;
 280                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
 281                 viaparinfo->lvds_setting_info->LCDDithering = 0;
 282                 break;
 283         case 0xF:
 284                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1600;
 285                 viaparinfo->lvds_setting_info->lcd_panel_vres = 1200;
 286                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
 287                 viaparinfo->lvds_setting_info->LCDDithering = 0;
 288                 break;
 289         case 0x10:
 290                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1366;
 291                 viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
 292                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
 293                 viaparinfo->lvds_setting_info->LCDDithering = 0;
 294                 break;
 295         case 0x11:
 296                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1024;
 297                 viaparinfo->lvds_setting_info->lcd_panel_vres = 600;
 298                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
 299                 viaparinfo->lvds_setting_info->LCDDithering = 1;
 300                 break;
 301         case 0x12:
 302                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1280;
 303                 viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
 304                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
 305                 viaparinfo->lvds_setting_info->LCDDithering = 1;
 306                 break;
 307         case 0x13:
 308                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1280;
 309                 viaparinfo->lvds_setting_info->lcd_panel_vres = 800;
 310                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
 311                 viaparinfo->lvds_setting_info->LCDDithering = 1;
 312                 break;
 313         case 0x14:
 314                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1360;
 315                 viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
 316                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
 317                 viaparinfo->lvds_setting_info->LCDDithering = 0;
 318                 break;
 319         case 0x15:
 320                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1280;
 321                 viaparinfo->lvds_setting_info->lcd_panel_vres = 768;
 322                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 1;
 323                 viaparinfo->lvds_setting_info->LCDDithering = 0;
 324                 break;
 325         case 0x16:
 326                 viaparinfo->lvds_setting_info->lcd_panel_hres = 480;
 327                 viaparinfo->lvds_setting_info->lcd_panel_vres = 640;
 328                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
 329                 viaparinfo->lvds_setting_info->LCDDithering = 1;
 330                 break;
 331         case 0x17:
 332                 /* OLPC XO-1.5 panel */
 333                 viaparinfo->lvds_setting_info->lcd_panel_hres = 1200;
 334                 viaparinfo->lvds_setting_info->lcd_panel_vres = 900;
 335                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
 336                 viaparinfo->lvds_setting_info->LCDDithering = 0;
 337                 break;
 338         default:
 339                 viaparinfo->lvds_setting_info->lcd_panel_hres = 800;
 340                 viaparinfo->lvds_setting_info->lcd_panel_vres = 600;
 341                 viaparinfo->lvds_setting_info->device_lcd_dualedge = 0;
 342                 viaparinfo->lvds_setting_info->LCDDithering = 1;
 343         }
 344 }
 345
 346 static int lvds_register_read(int index)
 347 {
 348         u8 data;
 349
 350         viafb_i2c_readbyte(VIA_PORT_2C,
 351                         (u8) viaparinfo->chip_info->lvds_chip_info.lvds_chip_slave_addr,
 352                         (u8) index, &data);
 353         return data;
 354 }
 355
 356 static void load_lcd_scaling(int set_hres, int set_vres, int panel_hres,
 357                       int panel_vres)
 358 {
 359         int reg_value = 0;
 360         int viafb_load_reg_num;
 361         struct io_register *reg = NULL;
 362
 363         DEBUG_MSG(KERN_INFO "load_lcd_scaling()!!\n");
 364
 365         /* LCD Scaling Enable */
 366         viafb_write_reg_mask(CR79, VIACR, 0x07, BIT0 + BIT1 + BIT2);
 367
 368         /* Check if expansion for horizontal */
 369         if (set_hres < panel_hres) {
 370                 /* Load Horizontal Scaling Factor */
 371                 switch (viaparinfo->chip_info->gfx_chip_name) {
 372                 case UNICHROME_CLE266:
 373                 case UNICHROME_K400:
 374                         reg_value =
 375                             CLE266_LCD_HOR_SCF_FORMULA(set_hres, panel_hres);
 376                         viafb_load_reg_num =
 377                             lcd_scaling_factor_CLE.lcd_hor_scaling_factor.
 378                             reg_num;
 379                         reg = lcd_scaling_factor_CLE.lcd_hor_scaling_factor.reg;
 380                         viafb_load_reg(reg_value,
 381                                 viafb_load_reg_num, reg, VIACR);
 382                         break;
 383                 case UNICHROME_K800:
 384                 case UNICHROME_PM800:
 385                 case UNICHROME_CN700:
 386                 case UNICHROME_CX700:
 387                 case UNICHROME_K8M890:
 388                 case UNICHROME_P4M890:
 389                 case UNICHROME_P4M900:
 390                 case UNICHROME_CN750:
 391                 case UNICHROME_VX800:
 392                 case UNICHROME_VX855:
 393                 case UNICHROME_VX900:
 394                         reg_value =
 395                             K800_LCD_HOR_SCF_FORMULA(set_hres, panel_hres);
 396                         /* Horizontal scaling enabled */
 397                         viafb_write_reg_mask(CRA2, VIACR, 0xC0, BIT7 + BIT6);
 398                         viafb_load_reg_num =
 399                             lcd_scaling_factor.lcd_hor_scaling_factor.reg_num;
 400                         reg = lcd_scaling_factor.lcd_hor_scaling_factor.reg;
 401                         viafb_load_reg(reg_value,
 402                                 viafb_load_reg_num, reg, VIACR);
 403                         break;
 404                 }
 405
 406                 DEBUG_MSG(KERN_INFO "Horizontal Scaling value = %d", reg_value);
 407         } else {
 408                 /* Horizontal scaling disabled */
 409                 viafb_write_reg_mask(CRA2, VIACR, 0x00, BIT7);
 410         }
 411
 412         /* Check if expansion for vertical */
 413         if (set_vres < panel_vres) {
 414                 /* Load Vertical Scaling Factor */
 415                 switch (viaparinfo->chip_info->gfx_chip_name) {
 416                 case UNICHROME_CLE266:
 417                 case UNICHROME_K400:
 418                         reg_value =
 419                             CLE266_LCD_VER_SCF_FORMULA(set_vres, panel_vres);
 420                         viafb_load_reg_num =
 421                             lcd_scaling_factor_CLE.lcd_ver_scaling_factor.
 422                             reg_num;
 423                         reg = lcd_scaling_factor_CLE.lcd_ver_scaling_factor.reg;
 424                         viafb_load_reg(reg_value,
 425                                 viafb_load_reg_num, reg, VIACR);
 426                         break;
 427                 case UNICHROME_K800:
 428                 case UNICHROME_PM800:
 429                 case UNICHROME_CN700:
 430                 case UNICHROME_CX700:
 431                 case UNICHROME_K8M890:
 432                 case UNICHROME_P4M890:
 433                 case UNICHROME_P4M900:
 434                 case UNICHROME_CN750:
 435                 case UNICHROME_VX800:
 436                 case UNICHROME_VX855:
 437                 case UNICHROME_VX900:
 438                         reg_value =
 439                             K800_LCD_VER_SCF_FORMULA(set_vres, panel_vres);
 440                         /* Vertical scaling enabled */
 441                         viafb_write_reg_mask(CRA2, VIACR, 0x08, BIT3);
 442                         viafb_load_reg_num =
 443                             lcd_scaling_factor.lcd_ver_scaling_factor.reg_num;
 444                         reg = lcd_scaling_factor.lcd_ver_scaling_factor.reg;
 445                         viafb_load_reg(reg_value,
 446                                 viafb_load_reg_num, reg, VIACR);
 447                         break;
 448                 }
 449
 450                 DEBUG_MSG(KERN_INFO "Vertical Scaling value = %d", reg_value);
 451         } else {
 452                 /* Vertical scaling disabled */
 453                 viafb_write_reg_mask(CRA2, VIACR, 0x00, BIT3);
 454         }
 455 }
 456
 457 static void via_pitch_alignment_patch_lcd(
 458         struct lvds_setting_information *plvds_setting_info,
 459                                    struct lvds_chip_information
 460                                    *plvds_chip_info)
 461 {
 462         unsigned char cr13, cr35, cr65, cr66, cr67;
 463         unsigned long dwScreenPitch = 0;
 464         unsigned long dwPitch;
 465
 466         dwPitch = plvds_setting_info->h_active * (plvds_setting_info->bpp >> 3);
 467         if (dwPitch & 0x1F) {
 468                 dwScreenPitch = ((dwPitch + 31) & ~31) >> 3;
 469                 if (plvds_setting_info->iga_path == IGA2) {
 470                         if (plvds_setting_info->bpp > 8) {
 471                                 cr66 = (unsigned char)(dwScreenPitch & 0xFF);
 472                                 viafb_write_reg(CR66, VIACR, cr66);
 473                                 cr67 = viafb_read_reg(VIACR, CR67) & 0xFC;
 474                                 cr67 |=
 475                                     (unsigned
 476                                      char)((dwScreenPitch & 0x300) >> 8);
 477                                 viafb_write_reg(CR67, VIACR, cr67);
 478                         }
 479
 480                         /* Fetch Count */
 481                         cr67 = viafb_read_reg(VIACR, CR67) & 0xF3;
 482                         cr67 |= (unsigned char)((dwScreenPitch & 0x600) >> 7);
 483                         viafb_write_reg(CR67, VIACR, cr67);
 484                         cr65 = (unsigned char)((dwScreenPitch >> 1) & 0xFF);
 485                         cr65 += 2;
 486                         viafb_write_reg(CR65, VIACR, cr65);
 487                 } else {
 488                         if (plvds_setting_info->bpp > 8) {
 489                                 cr13 = (unsigned char)(dwScreenPitch & 0xFF);
 490                                 viafb_write_reg(CR13, VIACR, cr13);
 491                                 cr35 = viafb_read_reg(VIACR, CR35) & 0x1F;
 492                                 cr35 |=
 493                                     (unsigned
 494                                      char)((dwScreenPitch & 0x700) >> 3);
 495                                 viafb_write_reg(CR35, VIACR, cr35);
 496                         }
 497                 }
 498         }
 499 }
 500 static void lcd_patch_skew_dvp0(struct lvds_setting_information
 501                          *plvds_setting_info,
 502                          struct lvds_chip_information *plvds_chip_info)
 503 {
 504         if (VT1636_LVDS == plvds_chip_info->lvds_chip_name) {
 505                 switch (viaparinfo->chip_info->gfx_chip_name) {
 506                 case UNICHROME_P4M900:
 507                         viafb_vt1636_patch_skew_on_vt3364(plvds_setting_info,
 508                                                     plvds_chip_info);
 509                         break;
 510                 case UNICHROME_P4M890:
 511                         viafb_vt1636_patch_skew_on_vt3327(plvds_setting_info,
 512                                                     plvds_chip_info);
 513                         break;
 514                 }
 515         }
 516 }
 517 static void lcd_patch_skew_dvp1(struct lvds_setting_information
 518                          *plvds_setting_info,
 519                          struct lvds_chip_information *plvds_chip_info)
 520 {
 521         if (VT1636_LVDS == plvds_chip_info->lvds_chip_name) {
 522                 switch (viaparinfo->chip_info->gfx_chip_name) {
 523                 case UNICHROME_CX700:
 524                         viafb_vt1636_patch_skew_on_vt3324(plvds_setting_info,
 525                                                     plvds_chip_info);
 526                         break;
 527                 }
 528         }
 529 }
 530 static void lcd_patch_skew(struct lvds_setting_information
 531         *plvds_setting_info, struct lvds_chip_information *plvds_chip_info)
 532 {
 533         DEBUG_MSG(KERN_INFO "lcd_patch_skew\n");
 534         switch (plvds_chip_info->output_interface) {
 535         case INTERFACE_DVP0:
 536                 lcd_patch_skew_dvp0(plvds_setting_info, plvds_chip_info);
 537                 break;
 538         case INTERFACE_DVP1:
 539                 lcd_patch_skew_dvp1(plvds_setting_info, plvds_chip_info);
 540                 break;
 541         case INTERFACE_DFP_LOW:
 542                 if (UNICHROME_P4M900 == viaparinfo->chip_info->gfx_chip_name) {
 543                         viafb_write_reg_mask(CR99, VIACR, 0x08,
 544                                        BIT0 + BIT1 + BIT2 + BIT3);
 545                 }
 546                 break;
 547         }
 548 }
 549
 550 /* LCD Set Mode */
 551 void viafb_lcd_set_mode(struct lvds_setting_information *plvds_setting_info,
 552         struct lvds_chip_information *plvds_chip_info)
 553 {
 554         int set_iga = plvds_setting_info->iga_path;
 555         int mode_bpp = plvds_setting_info->bpp;
 556         int set_hres = plvds_setting_info->h_active;
 557         int set_vres = plvds_setting_info->v_active;
 558         int panel_hres = plvds_setting_info->lcd_panel_hres;
 559         int panel_vres = plvds_setting_info->lcd_panel_vres;
 560         u32 clock;
 561         struct display_timing mode_crt_reg, panel_crt_reg, timing;
 562         struct crt_mode_table *mode_crt_table, *panel_crt_table;
 563
 564         DEBUG_MSG(KERN_INFO "viafb_lcd_set_mode!!\n");
 565         /* Get mode table */
 566         mode_crt_table = viafb_get_best_mode(set_hres, set_vres, 60);
 567         mode_crt_reg = mode_crt_table->crtc;
 568         /* Get panel table Pointer */
 569         panel_crt_table = viafb_get_best_mode(panel_hres, panel_vres, 60);
 570         panel_crt_reg = panel_crt_table->crtc;
 571         DEBUG_MSG(KERN_INFO "bellow viafb_lcd_set_mode!!\n");
 572         if (VT1636_LVDS == plvds_chip_info->lvds_chip_name)
 573                 viafb_init_lvds_vt1636(plvds_setting_info, plvds_chip_info);
 574         clock = panel_crt_reg.hor_total * panel_crt_reg.ver_total
 575                 * panel_crt_table->refresh_rate;
 576         plvds_setting_info->vclk = clock;
 577
 578         if (set_iga == IGA2 && (set_hres < panel_hres || set_vres < panel_vres)
 579                 && plvds_setting_info->display_method == LCD_EXPANDSION) {
 580                 timing = panel_crt_reg;
 581                 load_lcd_scaling(set_hres, set_vres, panel_hres, panel_vres);
 582         } else {
 583                 timing = lcd_centering_timging(mode_crt_reg, panel_crt_reg);
 584                 if (set_iga == IGA2)
 585                         /* disable scaling */
 586                         via_write_reg_mask(VIACR, 0x79, 0x00,
 587                                 BIT0 + BIT1 + BIT2);
 588         }
 589
 590         timing.hor_blank_end += timing.hor_blank_start;
 591         timing.hor_sync_end += timing.hor_sync_start;
 592         timing.ver_blank_end += timing.ver_blank_start;
 593         timing.ver_sync_end += timing.ver_sync_start;
 594         if (set_iga == IGA1)
 595                 via_set_primary_timing(&timing);
 596         else if (set_iga == IGA2)
 597                 via_set_secondary_timing(&timing);
 598
 599         /* Fetch count for IGA2 only */
 600         viafb_load_fetch_count_reg(set_hres, mode_bpp / 8, set_iga);
 601
 602         if ((viaparinfo->chip_info->gfx_chip_name != UNICHROME_CLE266)
 603                 && (viaparinfo->chip_info->gfx_chip_name != UNICHROME_K400))
 604                 viafb_load_FIFO_reg(set_iga, set_hres, set_vres);
 605
 606         fill_lcd_format();
 607         viafb_set_vclock(clock, set_iga);
 608         lcd_patch_skew(plvds_setting_info, plvds_chip_info);
 609
 610         /* If K8M800, enable LCD Prefetch Mode. */
 611         if ((viaparinfo->chip_info->gfx_chip_name == UNICHROME_K800)
 612             || (UNICHROME_K8M890 == viaparinfo->chip_info->gfx_chip_name))
 613                 viafb_write_reg_mask(CR6A, VIACR, 0x01, BIT0);
 614
 615         /* Patch for non 32bit alignment mode */
 616         via_pitch_alignment_patch_lcd(plvds_setting_info, plvds_chip_info);
 617 }
 618
 619 static void integrated_lvds_disable(struct lvds_setting_information
 620                              *plvds_setting_info,
 621                              struct lvds_chip_information *plvds_chip_info)
 622 {
 623         bool turn_off_first_powersequence = false;
 624         bool turn_off_second_powersequence = false;
 625         if (INTERFACE_LVDS0LVDS1 == plvds_chip_info->output_interface)
 626                 turn_off_first_powersequence = true;
 627         if (INTERFACE_LVDS0 == plvds_chip_info->output_interface)
 628                 turn_off_first_powersequence = true;
 629         if (INTERFACE_LVDS1 == plvds_chip_info->output_interface)
 630                 turn_off_second_powersequence = true;
 631         if (turn_off_second_powersequence) {
 632                 /* Use second power sequence control: */
 633
 634                 /* Turn off power sequence. */
 635                 viafb_write_reg_mask(CRD4, VIACR, 0, BIT1);
 636
 637                 /* Turn off back light. */
 638                 viafb_write_reg_mask(CRD3, VIACR, 0xC0, BIT6 + BIT7);
 639         }
 640         if (turn_off_first_powersequence) {
 641                 /* Use first power sequence control: */
 642
 643                 /* Turn off power sequence. */
 644                 viafb_write_reg_mask(CR6A, VIACR, 0, BIT3);
 645
 646                 /* Turn off back light. */
 647                 viafb_write_reg_mask(CR91, VIACR, 0xC0, BIT6 + BIT7);
 648         }
 649
 650         /* Power off LVDS channel. */
 651         switch (plvds_chip_info->output_interface) {
 652         case INTERFACE_LVDS0:
 653                 {
 654                         viafb_write_reg_mask(CRD2, VIACR, 0x80, BIT7);
 655                         break;
 656                 }
 657
 658         case INTERFACE_LVDS1:
 659                 {
 660                         viafb_write_reg_mask(CRD2, VIACR, 0x40, BIT6);
 661                         break;
 662                 }
 663
 664         case INTERFACE_LVDS0LVDS1:
 665                 {
 666                         viafb_write_reg_mask(CRD2, VIACR, 0xC0, BIT6 + BIT7);
 667                         break;
 668                 }
 669         }
 670 }
 671
 672 static void integrated_lvds_enable(struct lvds_setting_information
 673                             *plvds_setting_info,
 674                             struct lvds_chip_information *plvds_chip_info)
 675 {
 676         DEBUG_MSG(KERN_INFO "integrated_lvds_enable, out_interface:%d\n",
 677                   plvds_chip_info->output_interface);
 678         if (plvds_setting_info->lcd_mode == LCD_SPWG)
 679                 viafb_write_reg_mask(CRD2, VIACR, 0x00, BIT0 + BIT1);
 680         else
 681                 viafb_write_reg_mask(CRD2, VIACR, 0x03, BIT0 + BIT1);
 682
 683         switch (plvds_chip_info->output_interface) {
 684         case INTERFACE_LVDS0LVDS1:
 685         case INTERFACE_LVDS0:
 686                 /* Use first power sequence control: */
 687                 /* Use hardware control power sequence. */
 688                 viafb_write_reg_mask(CR91, VIACR, 0, BIT0);
 689                 /* Turn on back light. */
 690                 viafb_write_reg_mask(CR91, VIACR, 0, BIT6 + BIT7);
 691                 /* Turn on hardware power sequence. */
 692                 viafb_write_reg_mask(CR6A, VIACR, 0x08, BIT3);
 693                 break;
 694         case INTERFACE_LVDS1:
 695                 /* Use second power sequence control: */
 696                 /* Use hardware control power sequence. */
 697                 viafb_write_reg_mask(CRD3, VIACR, 0, BIT0);
 698                 /* Turn on back light. */
 699                 viafb_write_reg_mask(CRD3, VIACR, 0, BIT6 + BIT7);
 700                 /* Turn on hardware power sequence. */
 701                 viafb_write_reg_mask(CRD4, VIACR, 0x02, BIT1);
 702                 break;
 703         }
 704
 705         /* Power on LVDS channel. */
 706         switch (plvds_chip_info->output_interface) {
 707         case INTERFACE_LVDS0:
 708                 {
 709                         viafb_write_reg_mask(CRD2, VIACR, 0, BIT7);
 710                         break;
 711                 }
 712
 713         case INTERFACE_LVDS1:
 714                 {
 715                         viafb_write_reg_mask(CRD2, VIACR, 0, BIT6);
 716                         break;
 717                 }
 718
 719         case INTERFACE_LVDS0LVDS1:
 720                 {
 721                         viafb_write_reg_mask(CRD2, VIACR, 0, BIT6 + BIT7);
 722                         break;
 723                 }
 724         }
 725 }
 726
 727 void viafb_lcd_disable(void)
 728 {
 729
 730         if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266) {
 731                 lcd_powersequence_off();
 732                 /* DI1 pad off */
 733                 viafb_write_reg_mask(SR1E, VIASR, 0x00, 0x30);
 734         } else if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CX700) {
 735                 if (viafb_LCD2_ON
 736                     && (INTEGRATED_LVDS ==
 737                         viaparinfo->chip_info->lvds_chip_info2.lvds_chip_name))
 738                         integrated_lvds_disable(viaparinfo->lvds_setting_info,
 739                                 &viaparinfo->chip_info->lvds_chip_info2);
 740                 if (INTEGRATED_LVDS ==
 741                         viaparinfo->chip_info->lvds_chip_info.lvds_chip_name)
 742                         integrated_lvds_disable(viaparinfo->lvds_setting_info,
 743                                 &viaparinfo->chip_info->lvds_chip_info);
 744                 if (VT1636_LVDS == viaparinfo->chip_info->
 745                         lvds_chip_info.lvds_chip_name)
 746                         viafb_disable_lvds_vt1636(viaparinfo->lvds_setting_info,
 747                                 &viaparinfo->chip_info->lvds_chip_info);
 748         } else if (VT1636_LVDS ==
 749         viaparinfo->chip_info->lvds_chip_info.lvds_chip_name) {
 750                 viafb_disable_lvds_vt1636(viaparinfo->lvds_setting_info,
 751                                     &viaparinfo->chip_info->lvds_chip_info);
 752         } else {
 753                 /* Backlight off           */
 754                 viafb_write_reg_mask(SR3D, VIASR, 0x00, 0x20);
 755                 /* 24 bit DI data paht off */
 756                 viafb_write_reg_mask(CR91, VIACR, 0x80, 0x80);
 757         }
 758
 759         /* Disable expansion bit   */
 760         viafb_write_reg_mask(CR79, VIACR, 0x00, 0x01);
 761         /* Simultaneout disabled   */
 762         viafb_write_reg_mask(CR6B, VIACR, 0x00, 0x08);
 763 }
 764
 765 static void set_lcd_output_path(int set_iga, int output_interface)
 766 {
 767         switch (output_interface) {
 768         case INTERFACE_DFP:
 769                 if ((UNICHROME_K8M890 == viaparinfo->chip_info->gfx_chip_name)
 770                     || (UNICHROME_P4M890 ==
 771                     viaparinfo->chip_info->gfx_chip_name))
 772                         viafb_write_reg_mask(CR97, VIACR, 0x84,
 773                                        BIT7 + BIT2 + BIT1 + BIT0);
 774         case INTERFACE_DVP0:
 775         case INTERFACE_DVP1:
 776         case INTERFACE_DFP_HIGH:
 777         case INTERFACE_DFP_LOW:
 778                 if (set_iga == IGA2)
 779                         viafb_write_reg(CR91, VIACR, 0x00);
 780                 break;
 781         }
 782 }
 783
 784 void viafb_lcd_enable(void)
 785 {
 786         viafb_write_reg_mask(CR6B, VIACR, 0x00, BIT3);
 787         viafb_write_reg_mask(CR6A, VIACR, 0x08, BIT3);
 788         set_lcd_output_path(viaparinfo->lvds_setting_info->iga_path,
 789                 viaparinfo->chip_info->lvds_chip_info.output_interface);
 790         if (viafb_LCD2_ON)
 791                 set_lcd_output_path(viaparinfo->lvds_setting_info2->iga_path,
 792                         viaparinfo->chip_info->
 793                         lvds_chip_info2.output_interface);
 794
 795         if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CLE266) {
 796                 /* DI1 pad on */
 797                 viafb_write_reg_mask(SR1E, VIASR, 0x30, 0x30);
 798                 lcd_powersequence_on();
 799         } else if (viaparinfo->chip_info->gfx_chip_name == UNICHROME_CX700) {
 800                 if (viafb_LCD2_ON && (INTEGRATED_LVDS ==
 801                         viaparinfo->chip_info->lvds_chip_info2.lvds_chip_name))
 802                         integrated_lvds_enable(viaparinfo->lvds_setting_info2, \
 803                                 &viaparinfo->chip_info->lvds_chip_info2);
 804                 if (INTEGRATED_LVDS ==
 805                         viaparinfo->chip_info->lvds_chip_info.lvds_chip_name)
 806                         integrated_lvds_enable(viaparinfo->lvds_setting_info,
 807                                 &viaparinfo->chip_info->lvds_chip_info);
 808                 if (VT1636_LVDS == viaparinfo->chip_info->
 809                         lvds_chip_info.lvds_chip_name)
 810                         viafb_enable_lvds_vt1636(viaparinfo->
 811                         lvds_setting_info, &viaparinfo->chip_info->
 812                         lvds_chip_info);
 813         } else if (VT1636_LVDS ==
 814         viaparinfo->chip_info->lvds_chip_info.lvds_chip_name) {
 815                 viafb_enable_lvds_vt1636(viaparinfo->lvds_setting_info,
 816                                    &viaparinfo->chip_info->lvds_chip_info);
 817         } else {
 818                 /* Backlight on            */
 819                 viafb_write_reg_mask(SR3D, VIASR, 0x20, 0x20);
 820                 /* 24 bit DI data paht on  */
 821                 viafb_write_reg_mask(CR91, VIACR, 0x00, 0x80);
 822                 /* LCD enabled             */
 823                 viafb_write_reg_mask(CR6A, VIACR, 0x48, 0x48);
 824         }
 825 }
 826
 827 static void lcd_powersequence_off(void)
 828 {
 829         int i, mask, data;
 830
 831         /* Software control power sequence */
 832         viafb_write_reg_mask(CR91, VIACR, 0x11, 0x11);
 833
 834         for (i = 0; i < 3; i++) {
 835                 mask = PowerSequenceOff[0][i];
 836                 data = PowerSequenceOff[1][i] & mask;
 837                 viafb_write_reg_mask(CR91, VIACR, (u8) data, (u8) mask);
 838                 udelay(PowerSequenceOff[2][i]);
 839         }
 840
 841         /* Disable LCD */
 842         viafb_write_reg_mask(CR6A, VIACR, 0x00, 0x08);
 843 }
 844
 845 static void lcd_powersequence_on(void)
 846 {
 847         int i, mask, data;
 848
 849         /* Software control power sequence */
 850         viafb_write_reg_mask(CR91, VIACR, 0x11, 0x11);
 851
 852         /* Enable LCD */
 853         viafb_write_reg_mask(CR6A, VIACR, 0x08, 0x08);
 854
 855         for (i = 0; i < 3; i++) {
 856                 mask = PowerSequenceOn[0][i];
 857                 data = PowerSequenceOn[1][i] & mask;
 858                 viafb_write_reg_mask(CR91, VIACR, (u8) data, (u8) mask);
 859                 udelay(PowerSequenceOn[2][i]);
 860         }
 861
 862         udelay(1);
 863 }
 864
 865 static void fill_lcd_format(void)
 866 {
 867         u8 bdithering = 0, bdual = 0;
 868
 869         if (viaparinfo->lvds_setting_info->device_lcd_dualedge)
 870                 bdual = BIT4;
 871         if (viaparinfo->lvds_setting_info->LCDDithering)
 872                 bdithering = BIT0;
 873         /* Dual & Dithering */
 874         viafb_write_reg_mask(CR88, VIACR, (bdithering | bdual), BIT4 + BIT0);
 875 }
 876
 877 static void check_diport_of_integrated_lvds(
 878         struct lvds_chip_information *plvds_chip_info,
 879                                      struct lvds_setting_information
 880                                      *plvds_setting_info)
 881 {
 882         /* Determine LCD DI Port by hardware layout. */
 883         switch (viafb_display_hardware_layout) {
 884         case HW_LAYOUT_LCD_ONLY:
 885                 {
 886                         if (plvds_setting_info->device_lcd_dualedge) {
 887                                 plvds_chip_info->output_interface =
 888                                     INTERFACE_LVDS0LVDS1;
 889                         } else {
 890                                 plvds_chip_info->output_interface =
 891                                     INTERFACE_LVDS0;
 892                         }
 893
 894                         break;
 895                 }
 896
 897         case HW_LAYOUT_DVI_ONLY:
 898                 {
 899                         plvds_chip_info->output_interface = INTERFACE_NONE;
 900                         break;
 901                 }
 902
 903         case HW_LAYOUT_LCD1_LCD2:
 904         case HW_LAYOUT_LCD_EXTERNAL_LCD2:
 905                 {
 906                         plvds_chip_info->output_interface =
 907                             INTERFACE_LVDS0LVDS1;
 908                         break;
 909                 }
 910
 911         case HW_LAYOUT_LCD_DVI:
 912                 {
 913                         plvds_chip_info->output_interface = INTERFACE_LVDS1;
 914                         break;
 915                 }
 916
 917         default:
 918                 {
 919                         plvds_chip_info->output_interface = INTERFACE_LVDS1;
 920                         break;
 921                 }
 922         }
 923
 924         DEBUG_MSG(KERN_INFO
 925                   "Display Hardware Layout: 0x%x, LCD DI Port: 0x%x\n",
 926                   viafb_display_hardware_layout,
 927                   plvds_chip_info->output_interface);
 928 }
 929
 930 void __devinit viafb_init_lvds_output_interface(struct lvds_chip_information
 931                                 *plvds_chip_info,
 932                                 struct lvds_setting_information
 933                                 *plvds_setting_info)
 934 {
 935         if (INTERFACE_NONE != plvds_chip_info->output_interface) {
 936                 /*Do nothing, lcd port is specified by module parameter */
 937                 return;
 938         }
 939
 940         switch (plvds_chip_info->lvds_chip_name) {
 941
 942         case VT1636_LVDS:
 943                 switch (viaparinfo->chip_info->gfx_chip_name) {
 944                 case UNICHROME_CX700:
 945                         plvds_chip_info->output_interface = INTERFACE_DVP1;
 946                         break;
 947                 case UNICHROME_CN700:
 948                         plvds_chip_info->output_interface = INTERFACE_DFP_LOW;
 949                         break;
 950                 default:
 951                         plvds_chip_info->output_interface = INTERFACE_DVP0;
 952                         break;
 953                 }
 954                 break;
 955
 956         case INTEGRATED_LVDS:
 957                 check_diport_of_integrated_lvds(plvds_chip_info,
 958                                                 plvds_setting_info);
 959                 break;
 960
 961         default:
 962                 switch (viaparinfo->chip_info->gfx_chip_name) {
 963                 case UNICHROME_K8M890:
 964                 case UNICHROME_P4M900:
 965                 case UNICHROME_P4M890:
 966                         plvds_chip_info->output_interface = INTERFACE_DFP_LOW;
 967                         break;
 968                 default:
 969                         plvds_chip_info->output_interface = INTERFACE_DFP;
 970                         break;
 971                 }
 972                 break;
 973         }
 974 }
 975
 976 static struct display_timing lcd_centering_timging(struct display_timing
 977                                             mode_crt_reg,
 978                                             struct display_timing panel_crt_reg)
 979 {
 980         struct display_timing crt_reg;
 981
 982         crt_reg.hor_total = panel_crt_reg.hor_total;
 983         crt_reg.hor_addr = mode_crt_reg.hor_addr;
 984         crt_reg.hor_blank_start =
 985             (panel_crt_reg.hor_addr - mode_crt_reg.hor_addr) / 2 +
 986             crt_reg.hor_addr;
 987         crt_reg.hor_blank_end = panel_crt_reg.hor_blank_end;
 988         crt_reg.hor_sync_start =
 989             (panel_crt_reg.hor_sync_start -
 990              panel_crt_reg.hor_blank_start) + crt_reg.hor_blank_start;
 991         crt_reg.hor_sync_end = panel_crt_reg.hor_sync_end;
 992
 993         crt_reg.ver_total = panel_crt_reg.ver_total;
 994         crt_reg.ver_addr = mode_crt_reg.ver_addr;
 995         crt_reg.ver_blank_start =
 996             (panel_crt_reg.ver_addr - mode_crt_reg.ver_addr) / 2 +
 997             crt_reg.ver_addr;
 998         crt_reg.ver_blank_end = panel_crt_reg.ver_blank_end;
 999         crt_reg.ver_sync_start =
1000             (panel_crt_reg.ver_sync_start -
1001              panel_crt_reg.ver_blank_start) + crt_reg.ver_blank_start;
1002         crt_reg.ver_sync_end = panel_crt_reg.ver_sync_end;
1003
1004         return crt_reg;
1005 }
1006
1007 bool viafb_lcd_get_mobile_state(bool *mobile)
1008 {
1009         unsigned char __iomem *romptr, *tableptr, *biosptr;
1010         u8 core_base;
1011         /* Rom address */
1012         const u32 romaddr = 0x000C0000;
1013         u16 start_pattern;
1014
1015         biosptr = ioremap(romaddr, 0x10000);
1016         start_pattern = readw(biosptr);
1017
1018         /* Compare pattern */
1019         if (start_pattern == 0xAA55) {
1020                 /* Get the start of Table */
1021                 /* 0x1B means BIOS offset position */
1022                 romptr = biosptr + 0x1B;
1023                 tableptr = biosptr + readw(romptr);
1024
1025                 /* Get the start of biosver structure */
1026                 /* 18 means BIOS version position. */
1027                 romptr = tableptr + 18;
1028                 romptr = biosptr + readw(romptr);
1029
1030                 /* The offset should be 44, but the
1031                    actual image is less three char. */
1032                 /* pRom += 44; */
1033                 romptr += 41;
1034
1035                 core_base = readb(romptr);
1036
1037                 if (core_base & 0x8)
1038                         *mobile = false;
1039                 else
1040                         *mobile = true;
1041                 /* release memory */
1042                 iounmap(biosptr);
1043
1044                 return true;
1045         } else {
1046                 iounmap(biosptr);
1047                 return false;
1048         }
1049 }