drivers/gpu/drm/i915/i915_suspend.c

   1 /*
   2  *
   3  * Copyright 2008 (c) Intel Corporation
   4  *   Jesse Barnes <jbarnes@virtuousgeek.org>
   5  *
   6  * Permission is hereby granted, free of charge, to any person obtaining a
   7  * copy of this software and associated documentation files (the
   8  * "Software"), to deal in the Software without restriction, including
   9  * without limitation the rights to use, copy, modify, merge, publish,
  10  * distribute, sub license, and/or sell copies of the Software, and to
  11  * permit persons to whom the Software is furnished to do so, subject to
  12  * the following conditions:
  13  *
  14  * The above copyright notice and this permission notice (including the
  15  * next paragraph) shall be included in all copies or substantial portions
  16  * of the Software.
  17  *
  18  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  19  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  21  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  22  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  23  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  24  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  25  */
  26
  27 #include "drmP.h"
  28 #include "drm.h"
  29 #include "i915_drm.h"
  30 #include "intel_drv.h"
  31
  32 static bool i915_pipe_enabled(struct drm_device *dev, enum pipe pipe)
  33 {
  34         struct drm_i915_private *dev_priv = dev->dev_private;
  35         u32     dpll_reg;
  36
  37         if (HAS_PCH_SPLIT(dev)) {
  38                 dpll_reg = (pipe == PIPE_A) ? PCH_DPLL_A: PCH_DPLL_B;
  39         } else {
  40                 dpll_reg = (pipe == PIPE_A) ? DPLL_A: DPLL_B;
  41         }
  42
  43         return (I915_READ(dpll_reg) & DPLL_VCO_ENABLE);
  44 }
  45
  46 static void i915_save_palette(struct drm_device *dev, enum pipe pipe)
  47 {
  48         struct drm_i915_private *dev_priv = dev->dev_private;
  49         unsigned long reg = (pipe == PIPE_A ? PALETTE_A : PALETTE_B);
  50         u32 *array;
  51         int i;
  52
  53         if (!i915_pipe_enabled(dev, pipe))
  54                 return;
  55
  56         if (HAS_PCH_SPLIT(dev))
  57                 reg = (pipe == PIPE_A) ? LGC_PALETTE_A : LGC_PALETTE_B;
  58
  59         if (pipe == PIPE_A)
  60                 array = dev_priv->save_palette_a;
  61         else
  62                 array = dev_priv->save_palette_b;
  63
  64         for(i = 0; i < 256; i++)
  65                 array[i] = I915_READ(reg + (i << 2));
  66 }
  67
  68 static void i915_restore_palette(struct drm_device *dev, enum pipe pipe)
  69 {
  70         struct drm_i915_private *dev_priv = dev->dev_private;
  71         unsigned long reg = (pipe == PIPE_A ? PALETTE_A : PALETTE_B);
  72         u32 *array;
  73         int i;
  74
  75         if (!i915_pipe_enabled(dev, pipe))
  76                 return;
  77
  78         if (HAS_PCH_SPLIT(dev))
  79                 reg = (pipe == PIPE_A) ? LGC_PALETTE_A : LGC_PALETTE_B;
  80
  81         if (pipe == PIPE_A)
  82                 array = dev_priv->save_palette_a;
  83         else
  84                 array = dev_priv->save_palette_b;
  85
  86         for(i = 0; i < 256; i++)
  87                 I915_WRITE(reg + (i << 2), array[i]);
  88 }
  89
  90 static u8 i915_read_indexed(struct drm_device *dev, u16 index_port, u16 data_port, u8 reg)
  91 {
  92         struct drm_i915_private *dev_priv = dev->dev_private;
  93
  94         I915_WRITE8(index_port, reg);
  95         return I915_READ8(data_port);
  96 }
  97
  98 static u8 i915_read_ar(struct drm_device *dev, u16 st01, u8 reg, u16 palette_enable)
  99 {
 100         struct drm_i915_private *dev_priv = dev->dev_private;
 101
 102         I915_READ8(st01);
 103         I915_WRITE8(VGA_AR_INDEX, palette_enable | reg);
 104         return I915_READ8(VGA_AR_DATA_READ);
 105 }
 106
 107 static void i915_write_ar(struct drm_device *dev, u16 st01, u8 reg, u8 val, u16 palette_enable)
 108 {
 109         struct drm_i915_private *dev_priv = dev->dev_private;
 110
 111         I915_READ8(st01);
 112         I915_WRITE8(VGA_AR_INDEX, palette_enable | reg);
 113         I915_WRITE8(VGA_AR_DATA_WRITE, val);
 114 }
 115
 116 static void i915_write_indexed(struct drm_device *dev, u16 index_port, u16 data_port, u8 reg, u8 val)
 117 {
 118         struct drm_i915_private *dev_priv = dev->dev_private;
 119
 120         I915_WRITE8(index_port, reg);
 121         I915_WRITE8(data_port, val);
 122 }
 123
 124 static void i915_save_vga(struct drm_device *dev)
 125 {
 126         struct drm_i915_private *dev_priv = dev->dev_private;
 127         int i;
 128         u16 cr_index, cr_data, st01;
 129
 130         /* VGA color palette registers */
 131         dev_priv->saveDACMASK = I915_READ8(VGA_DACMASK);
 132
 133         /* MSR bits */
 134         dev_priv->saveMSR = I915_READ8(VGA_MSR_READ);
 135         if (dev_priv->saveMSR & VGA_MSR_CGA_MODE) {
 136                 cr_index = VGA_CR_INDEX_CGA;
 137                 cr_data = VGA_CR_DATA_CGA;
 138                 st01 = VGA_ST01_CGA;
 139         } else {
 140                 cr_index = VGA_CR_INDEX_MDA;
 141                 cr_data = VGA_CR_DATA_MDA;
 142                 st01 = VGA_ST01_MDA;
 143         }
 144
 145         /* CRT controller regs */
 146         i915_write_indexed(dev, cr_index, cr_data, 0x11,
 147                            i915_read_indexed(dev, cr_index, cr_data, 0x11) &
 148                            (~0x80));
 149         for (i = 0; i <= 0x24; i++)
 150                 dev_priv->saveCR[i] =
 151                         i915_read_indexed(dev, cr_index, cr_data, i);
 152         /* Make sure we don't turn off CR group 0 writes */
 153         dev_priv->saveCR[0x11] &= ~0x80;
 154
 155         /* Attribute controller registers */
 156         I915_READ8(st01);
 157         dev_priv->saveAR_INDEX = I915_READ8(VGA_AR_INDEX);
 158         for (i = 0; i <= 0x14; i++)
 159                 dev_priv->saveAR[i] = i915_read_ar(dev, st01, i, 0);
 160         I915_READ8(st01);
 161         I915_WRITE8(VGA_AR_INDEX, dev_priv->saveAR_INDEX);
 162         I915_READ8(st01);
 163
 164         /* Graphics controller registers */
 165         for (i = 0; i < 9; i++)
 166                 dev_priv->saveGR[i] =
 167                         i915_read_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, i);
 168
 169         dev_priv->saveGR[0x10] =
 170                 i915_read_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x10);
 171         dev_priv->saveGR[0x11] =
 172                 i915_read_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x11);
 173         dev_priv->saveGR[0x18] =
 174                 i915_read_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x18);
 175
 176         /* Sequencer registers */
 177         for (i = 0; i < 8; i++)
 178                 dev_priv->saveSR[i] =
 179                         i915_read_indexed(dev, VGA_SR_INDEX, VGA_SR_DATA, i);
 180 }
 181
 182 static void i915_restore_vga(struct drm_device *dev)
 183 {
 184         struct drm_i915_private *dev_priv = dev->dev_private;
 185         int i;
 186         u16 cr_index, cr_data, st01;
 187
 188         /* MSR bits */
 189         I915_WRITE8(VGA_MSR_WRITE, dev_priv->saveMSR);
 190         if (dev_priv->saveMSR & VGA_MSR_CGA_MODE) {
 191                 cr_index = VGA_CR_INDEX_CGA;
 192                 cr_data = VGA_CR_DATA_CGA;
 193                 st01 = VGA_ST01_CGA;
 194         } else {
 195                 cr_index = VGA_CR_INDEX_MDA;
 196                 cr_data = VGA_CR_DATA_MDA;
 197                 st01 = VGA_ST01_MDA;
 198         }
 199
 200         /* Sequencer registers, don't write SR07 */
 201         for (i = 0; i < 7; i++)
 202                 i915_write_indexed(dev, VGA_SR_INDEX, VGA_SR_DATA, i,
 203                                    dev_priv->saveSR[i]);
 204
 205         /* CRT controller regs */
 206         /* Enable CR group 0 writes */
 207         i915_write_indexed(dev, cr_index, cr_data, 0x11, dev_priv->saveCR[0x11]);
 208         for (i = 0; i <= 0x24; i++)
 209                 i915_write_indexed(dev, cr_index, cr_data, i, dev_priv->saveCR[i]);
 210
 211         /* Graphics controller regs */
 212         for (i = 0; i < 9; i++)
 213                 i915_write_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, i,
 214                                    dev_priv->saveGR[i]);
 215
 216         i915_write_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x10,
 217                            dev_priv->saveGR[0x10]);
 218         i915_write_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x11,
 219                            dev_priv->saveGR[0x11]);
 220         i915_write_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x18,
 221                            dev_priv->saveGR[0x18]);
 222
 223         /* Attribute controller registers */
 224         I915_READ8(st01); /* switch back to index mode */
 225         for (i = 0; i <= 0x14; i++)
 226                 i915_write_ar(dev, st01, i, dev_priv->saveAR[i], 0);
 227         I915_READ8(st01); /* switch back to index mode */
 228         I915_WRITE8(VGA_AR_INDEX, dev_priv->saveAR_INDEX | 0x20);
 229         I915_READ8(st01);
 230
 231         /* VGA color palette registers */
 232         I915_WRITE8(VGA_DACMASK, dev_priv->saveDACMASK);
 233 }
 234
 235 static void i915_save_modeset_reg(struct drm_device *dev)
 236 {
 237         struct drm_i915_private *dev_priv = dev->dev_private;
 238         int i;
 239
 240         if (drm_core_check_feature(dev, DRIVER_MODESET))
 241                 return;
 242
 243         /* Cursor state */
 244         dev_priv->saveCURACNTR = I915_READ(CURACNTR);
 245         dev_priv->saveCURAPOS = I915_READ(CURAPOS);
 246         dev_priv->saveCURABASE = I915_READ(CURABASE);
 247         dev_priv->saveCURBCNTR = I915_READ(CURBCNTR);
 248         dev_priv->saveCURBPOS = I915_READ(CURBPOS);
 249         dev_priv->saveCURBBASE = I915_READ(CURBBASE);
 250         if (IS_GEN2(dev))
 251                 dev_priv->saveCURSIZE = I915_READ(CURSIZE);
 252
 253         if (HAS_PCH_SPLIT(dev)) {
 254                 dev_priv->savePCH_DREF_CONTROL = I915_READ(PCH_DREF_CONTROL);
 255                 dev_priv->saveDISP_ARB_CTL = I915_READ(DISP_ARB_CTL);
 256         }
 257
 258         /* Pipe & plane A info */
 259         dev_priv->savePIPEACONF = I915_READ(PIPEACONF);
 260         dev_priv->savePIPEASRC = I915_READ(PIPEASRC);
 261         if (HAS_PCH_SPLIT(dev)) {
 262                 dev_priv->saveFPA0 = I915_READ(PCH_FPA0);
 263                 dev_priv->saveFPA1 = I915_READ(PCH_FPA1);
 264                 dev_priv->saveDPLL_A = I915_READ(PCH_DPLL_A);
 265         } else {
 266                 dev_priv->saveFPA0 = I915_READ(FPA0);
 267                 dev_priv->saveFPA1 = I915_READ(FPA1);
 268                 dev_priv->saveDPLL_A = I915_READ(DPLL_A);
 269         }
 270         if (INTEL_INFO(dev)->gen >= 4 && !HAS_PCH_SPLIT(dev))
 271                 dev_priv->saveDPLL_A_MD = I915_READ(DPLL_A_MD);
 272         dev_priv->saveHTOTAL_A = I915_READ(HTOTAL_A);
 273         dev_priv->saveHBLANK_A = I915_READ(HBLANK_A);
 274         dev_priv->saveHSYNC_A = I915_READ(HSYNC_A);
 275         dev_priv->saveVTOTAL_A = I915_READ(VTOTAL_A);
 276         dev_priv->saveVBLANK_A = I915_READ(VBLANK_A);
 277         dev_priv->saveVSYNC_A = I915_READ(VSYNC_A);
 278         if (!HAS_PCH_SPLIT(dev))
 279                 dev_priv->saveBCLRPAT_A = I915_READ(BCLRPAT_A);
 280
 281         if (HAS_PCH_SPLIT(dev)) {
 282                 dev_priv->savePIPEA_DATA_M1 = I915_READ(PIPEA_DATA_M1);
 283                 dev_priv->savePIPEA_DATA_N1 = I915_READ(PIPEA_DATA_N1);
 284                 dev_priv->savePIPEA_LINK_M1 = I915_READ(PIPEA_LINK_M1);
 285                 dev_priv->savePIPEA_LINK_N1 = I915_READ(PIPEA_LINK_N1);
 286
 287                 dev_priv->saveFDI_TXA_CTL = I915_READ(FDI_TXA_CTL);
 288                 dev_priv->saveFDI_RXA_CTL = I915_READ(FDI_RXA_CTL);
 289
 290                 dev_priv->savePFA_CTL_1 = I915_READ(PFA_CTL_1);
 291                 dev_priv->savePFA_WIN_SZ = I915_READ(PFA_WIN_SZ);
 292                 dev_priv->savePFA_WIN_POS = I915_READ(PFA_WIN_POS);
 293
 294                 dev_priv->saveTRANSACONF = I915_READ(TRANSACONF);
 295                 dev_priv->saveTRANS_HTOTAL_A = I915_READ(TRANS_HTOTAL_A);
 296                 dev_priv->saveTRANS_HBLANK_A = I915_READ(TRANS_HBLANK_A);
 297                 dev_priv->saveTRANS_HSYNC_A = I915_READ(TRANS_HSYNC_A);
 298                 dev_priv->saveTRANS_VTOTAL_A = I915_READ(TRANS_VTOTAL_A);
 299                 dev_priv->saveTRANS_VBLANK_A = I915_READ(TRANS_VBLANK_A);
 300                 dev_priv->saveTRANS_VSYNC_A = I915_READ(TRANS_VSYNC_A);
 301         }
 302
 303         dev_priv->saveDSPACNTR = I915_READ(DSPACNTR);
 304         dev_priv->saveDSPASTRIDE = I915_READ(DSPASTRIDE);
 305         dev_priv->saveDSPASIZE = I915_READ(DSPASIZE);
 306         dev_priv->saveDSPAPOS = I915_READ(DSPAPOS);
 307         dev_priv->saveDSPAADDR = I915_READ(DSPAADDR);
 308         if (INTEL_INFO(dev)->gen >= 4) {
 309                 dev_priv->saveDSPASURF = I915_READ(DSPASURF);
 310                 dev_priv->saveDSPATILEOFF = I915_READ(DSPATILEOFF);
 311         }
 312         i915_save_palette(dev, PIPE_A);
 313         dev_priv->savePIPEASTAT = I915_READ(PIPEASTAT);
 314
 315         /* Pipe & plane B info */
 316         dev_priv->savePIPEBCONF = I915_READ(PIPEBCONF);
 317         dev_priv->savePIPEBSRC = I915_READ(PIPEBSRC);
 318         if (HAS_PCH_SPLIT(dev)) {
 319                 dev_priv->saveFPB0 = I915_READ(PCH_FPB0);
 320                 dev_priv->saveFPB1 = I915_READ(PCH_FPB1);
 321                 dev_priv->saveDPLL_B = I915_READ(PCH_DPLL_B);
 322         } else {
 323                 dev_priv->saveFPB0 = I915_READ(FPB0);
 324                 dev_priv->saveFPB1 = I915_READ(FPB1);
 325                 dev_priv->saveDPLL_B = I915_READ(DPLL_B);
 326         }
 327         if (INTEL_INFO(dev)->gen >= 4 && !HAS_PCH_SPLIT(dev))
 328                 dev_priv->saveDPLL_B_MD = I915_READ(DPLL_B_MD);
 329         dev_priv->saveHTOTAL_B = I915_READ(HTOTAL_B);
 330         dev_priv->saveHBLANK_B = I915_READ(HBLANK_B);
 331         dev_priv->saveHSYNC_B = I915_READ(HSYNC_B);
 332         dev_priv->saveVTOTAL_B = I915_READ(VTOTAL_B);
 333         dev_priv->saveVBLANK_B = I915_READ(VBLANK_B);
 334         dev_priv->saveVSYNC_B = I915_READ(VSYNC_B);
 335         if (!HAS_PCH_SPLIT(dev))
 336                 dev_priv->saveBCLRPAT_B = I915_READ(BCLRPAT_B);
 337
 338         if (HAS_PCH_SPLIT(dev)) {
 339                 dev_priv->savePIPEB_DATA_M1 = I915_READ(PIPEB_DATA_M1);
 340                 dev_priv->savePIPEB_DATA_N1 = I915_READ(PIPEB_DATA_N1);
 341                 dev_priv->savePIPEB_LINK_M1 = I915_READ(PIPEB_LINK_M1);
 342                 dev_priv->savePIPEB_LINK_N1 = I915_READ(PIPEB_LINK_N1);
 343
 344                 dev_priv->saveFDI_TXB_CTL = I915_READ(FDI_TXB_CTL);
 345                 dev_priv->saveFDI_RXB_CTL = I915_READ(FDI_RXB_CTL);
 346
 347                 dev_priv->savePFB_CTL_1 = I915_READ(PFB_CTL_1);
 348                 dev_priv->savePFB_WIN_SZ = I915_READ(PFB_WIN_SZ);
 349                 dev_priv->savePFB_WIN_POS = I915_READ(PFB_WIN_POS);
 350
 351                 dev_priv->saveTRANSBCONF = I915_READ(TRANSBCONF);
 352                 dev_priv->saveTRANS_HTOTAL_B = I915_READ(TRANS_HTOTAL_B);
 353                 dev_priv->saveTRANS_HBLANK_B = I915_READ(TRANS_HBLANK_B);
 354                 dev_priv->saveTRANS_HSYNC_B = I915_READ(TRANS_HSYNC_B);
 355                 dev_priv->saveTRANS_VTOTAL_B = I915_READ(TRANS_VTOTAL_B);
 356                 dev_priv->saveTRANS_VBLANK_B = I915_READ(TRANS_VBLANK_B);
 357                 dev_priv->saveTRANS_VSYNC_B = I915_READ(TRANS_VSYNC_B);
 358         }
 359
 360         dev_priv->saveDSPBCNTR = I915_READ(DSPBCNTR);
 361         dev_priv->saveDSPBSTRIDE = I915_READ(DSPBSTRIDE);
 362         dev_priv->saveDSPBSIZE = I915_READ(DSPBSIZE);
 363         dev_priv->saveDSPBPOS = I915_READ(DSPBPOS);
 364         dev_priv->saveDSPBADDR = I915_READ(DSPBADDR);
 365         if (INTEL_INFO(dev)->gen >= 4) {
 366                 dev_priv->saveDSPBSURF = I915_READ(DSPBSURF);
 367                 dev_priv->saveDSPBTILEOFF = I915_READ(DSPBTILEOFF);
 368         }
 369         i915_save_palette(dev, PIPE_B);
 370         dev_priv->savePIPEBSTAT = I915_READ(PIPEBSTAT);
 371
 372         /* Fences */
 373         switch (INTEL_INFO(dev)->gen) {
 374         case 6:
 375                 for (i = 0; i < 16; i++)
 376                         dev_priv->saveFENCE[i] = I915_READ64(FENCE_REG_SANDYBRIDGE_0 + (i * 8));
 377                 break;
 378         case 5:
 379         case 4:
 380                 for (i = 0; i < 16; i++)
 381                         dev_priv->saveFENCE[i] = I915_READ64(FENCE_REG_965_0 + (i * 8));
 382                 break;
 383         case 3:
 384                 if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))
 385                         for (i = 0; i < 8; i++)
 386                                 dev_priv->saveFENCE[i+8] = I915_READ(FENCE_REG_945_8 + (i * 4));
 387         case 2:
 388                 for (i = 0; i < 8; i++)
 389                         dev_priv->saveFENCE[i] = I915_READ(FENCE_REG_830_0 + (i * 4));
 390                 break;
 391         }
 392
 393         return;
 394 }
 395
 396 static void i915_restore_modeset_reg(struct drm_device *dev)
 397 {
 398         struct drm_i915_private *dev_priv = dev->dev_private;
 399         int dpll_a_reg, fpa0_reg, fpa1_reg;
 400         int dpll_b_reg, fpb0_reg, fpb1_reg;
 401         int i;
 402
 403         if (drm_core_check_feature(dev, DRIVER_MODESET))
 404                 return;
 405
 406         /* Fences */
 407         switch (INTEL_INFO(dev)->gen) {
 408         case 6:
 409                 for (i = 0; i < 16; i++)
 410                         I915_WRITE64(FENCE_REG_SANDYBRIDGE_0 + (i * 8), dev_priv->saveFENCE[i]);
 411                 break;
 412         case 5:
 413         case 4:
 414                 for (i = 0; i < 16; i++)
 415                         I915_WRITE64(FENCE_REG_965_0 + (i * 8), dev_priv->saveFENCE[i]);
 416                 break;
 417         case 3:
 418         case 2:
 419                 if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))
 420                         for (i = 0; i < 8; i++)
 421                                 I915_WRITE(FENCE_REG_945_8 + (i * 4), dev_priv->saveFENCE[i+8]);
 422                 for (i = 0; i < 8; i++)
 423                         I915_WRITE(FENCE_REG_830_0 + (i * 4), dev_priv->saveFENCE[i]);
 424                 break;
 425         }
 426
 427
 428         if (HAS_PCH_SPLIT(dev)) {
 429                 dpll_a_reg = PCH_DPLL_A;
 430                 dpll_b_reg = PCH_DPLL_B;
 431                 fpa0_reg = PCH_FPA0;
 432                 fpb0_reg = PCH_FPB0;
 433                 fpa1_reg = PCH_FPA1;
 434                 fpb1_reg = PCH_FPB1;
 435         } else {
 436                 dpll_a_reg = DPLL_A;
 437                 dpll_b_reg = DPLL_B;
 438                 fpa0_reg = FPA0;
 439                 fpb0_reg = FPB0;
 440                 fpa1_reg = FPA1;
 441                 fpb1_reg = FPB1;
 442         }
 443
 444         if (HAS_PCH_SPLIT(dev)) {
 445                 I915_WRITE(PCH_DREF_CONTROL, dev_priv->savePCH_DREF_CONTROL);
 446                 I915_WRITE(DISP_ARB_CTL, dev_priv->saveDISP_ARB_CTL);
 447         }
 448
 449         /* Pipe & plane A info */
 450         /* Prime the clock */
 451         if (dev_priv->saveDPLL_A & DPLL_VCO_ENABLE) {
 452                 I915_WRITE(dpll_a_reg, dev_priv->saveDPLL_A &
 453                            ~DPLL_VCO_ENABLE);
 454                 POSTING_READ(dpll_a_reg);
 455                 udelay(150);
 456         }
 457         I915_WRITE(fpa0_reg, dev_priv->saveFPA0);
 458         I915_WRITE(fpa1_reg, dev_priv->saveFPA1);
 459         /* Actually enable it */
 460         I915_WRITE(dpll_a_reg, dev_priv->saveDPLL_A);
 461         POSTING_READ(dpll_a_reg);
 462         udelay(150);
 463         if (INTEL_INFO(dev)->gen >= 4 && !HAS_PCH_SPLIT(dev)) {
 464                 I915_WRITE(DPLL_A_MD, dev_priv->saveDPLL_A_MD);
 465                 POSTING_READ(DPLL_A_MD);
 466         }
 467         udelay(150);
 468
 469         /* Restore mode */
 470         I915_WRITE(HTOTAL_A, dev_priv->saveHTOTAL_A);
 471         I915_WRITE(HBLANK_A, dev_priv->saveHBLANK_A);
 472         I915_WRITE(HSYNC_A, dev_priv->saveHSYNC_A);
 473         I915_WRITE(VTOTAL_A, dev_priv->saveVTOTAL_A);
 474         I915_WRITE(VBLANK_A, dev_priv->saveVBLANK_A);
 475         I915_WRITE(VSYNC_A, dev_priv->saveVSYNC_A);
 476         if (!HAS_PCH_SPLIT(dev))
 477                 I915_WRITE(BCLRPAT_A, dev_priv->saveBCLRPAT_A);
 478
 479         if (HAS_PCH_SPLIT(dev)) {
 480                 I915_WRITE(PIPEA_DATA_M1, dev_priv->savePIPEA_DATA_M1);
 481                 I915_WRITE(PIPEA_DATA_N1, dev_priv->savePIPEA_DATA_N1);
 482                 I915_WRITE(PIPEA_LINK_M1, dev_priv->savePIPEA_LINK_M1);
 483                 I915_WRITE(PIPEA_LINK_N1, dev_priv->savePIPEA_LINK_N1);
 484
 485                 I915_WRITE(FDI_RXA_CTL, dev_priv->saveFDI_RXA_CTL);
 486                 I915_WRITE(FDI_TXA_CTL, dev_priv->saveFDI_TXA_CTL);
 487
 488                 I915_WRITE(PFA_CTL_1, dev_priv->savePFA_CTL_1);
 489                 I915_WRITE(PFA_WIN_SZ, dev_priv->savePFA_WIN_SZ);
 490                 I915_WRITE(PFA_WIN_POS, dev_priv->savePFA_WIN_POS);
 491
 492                 I915_WRITE(TRANSACONF, dev_priv->saveTRANSACONF);
 493                 I915_WRITE(TRANS_HTOTAL_A, dev_priv->saveTRANS_HTOTAL_A);
 494                 I915_WRITE(TRANS_HBLANK_A, dev_priv->saveTRANS_HBLANK_A);
 495                 I915_WRITE(TRANS_HSYNC_A, dev_priv->saveTRANS_HSYNC_A);
 496                 I915_WRITE(TRANS_VTOTAL_A, dev_priv->saveTRANS_VTOTAL_A);
 497                 I915_WRITE(TRANS_VBLANK_A, dev_priv->saveTRANS_VBLANK_A);
 498                 I915_WRITE(TRANS_VSYNC_A, dev_priv->saveTRANS_VSYNC_A);
 499         }
 500
 501         /* Restore plane info */
 502         I915_WRITE(DSPASIZE, dev_priv->saveDSPASIZE);
 503         I915_WRITE(DSPAPOS, dev_priv->saveDSPAPOS);
 504         I915_WRITE(PIPEASRC, dev_priv->savePIPEASRC);
 505         I915_WRITE(DSPAADDR, dev_priv->saveDSPAADDR);
 506         I915_WRITE(DSPASTRIDE, dev_priv->saveDSPASTRIDE);
 507         if (INTEL_INFO(dev)->gen >= 4) {
 508                 I915_WRITE(DSPASURF, dev_priv->saveDSPASURF);
 509                 I915_WRITE(DSPATILEOFF, dev_priv->saveDSPATILEOFF);
 510         }
 511
 512         I915_WRITE(PIPEACONF, dev_priv->savePIPEACONF);
 513
 514         i915_restore_palette(dev, PIPE_A);
 515         /* Enable the plane */
 516         I915_WRITE(DSPACNTR, dev_priv->saveDSPACNTR);
 517         I915_WRITE(DSPAADDR, I915_READ(DSPAADDR));
 518
 519         /* Pipe & plane B info */
 520         if (dev_priv->saveDPLL_B & DPLL_VCO_ENABLE) {
 521                 I915_WRITE(dpll_b_reg, dev_priv->saveDPLL_B &
 522                            ~DPLL_VCO_ENABLE);
 523                 POSTING_READ(dpll_b_reg);
 524                 udelay(150);
 525         }
 526         I915_WRITE(fpb0_reg, dev_priv->saveFPB0);
 527         I915_WRITE(fpb1_reg, dev_priv->saveFPB1);
 528         /* Actually enable it */
 529         I915_WRITE(dpll_b_reg, dev_priv->saveDPLL_B);
 530         POSTING_READ(dpll_b_reg);
 531         udelay(150);
 532         if (INTEL_INFO(dev)->gen >= 4 && !HAS_PCH_SPLIT(dev)) {
 533                 I915_WRITE(DPLL_B_MD, dev_priv->saveDPLL_B_MD);
 534                 POSTING_READ(DPLL_B_MD);
 535         }
 536         udelay(150);
 537
 538         /* Restore mode */
 539         I915_WRITE(HTOTAL_B, dev_priv->saveHTOTAL_B);
 540         I915_WRITE(HBLANK_B, dev_priv->saveHBLANK_B);
 541         I915_WRITE(HSYNC_B, dev_priv->saveHSYNC_B);
 542         I915_WRITE(VTOTAL_B, dev_priv->saveVTOTAL_B);
 543         I915_WRITE(VBLANK_B, dev_priv->saveVBLANK_B);
 544         I915_WRITE(VSYNC_B, dev_priv->saveVSYNC_B);
 545         if (!HAS_PCH_SPLIT(dev))
 546                 I915_WRITE(BCLRPAT_B, dev_priv->saveBCLRPAT_B);
 547
 548         if (HAS_PCH_SPLIT(dev)) {
 549                 I915_WRITE(PIPEB_DATA_M1, dev_priv->savePIPEB_DATA_M1);
 550                 I915_WRITE(PIPEB_DATA_N1, dev_priv->savePIPEB_DATA_N1);
 551                 I915_WRITE(PIPEB_LINK_M1, dev_priv->savePIPEB_LINK_M1);
 552                 I915_WRITE(PIPEB_LINK_N1, dev_priv->savePIPEB_LINK_N1);
 553
 554                 I915_WRITE(FDI_RXB_CTL, dev_priv->saveFDI_RXB_CTL);
 555                 I915_WRITE(FDI_TXB_CTL, dev_priv->saveFDI_TXB_CTL);
 556
 557                 I915_WRITE(PFB_CTL_1, dev_priv->savePFB_CTL_1);
 558                 I915_WRITE(PFB_WIN_SZ, dev_priv->savePFB_WIN_SZ);
 559                 I915_WRITE(PFB_WIN_POS, dev_priv->savePFB_WIN_POS);
 560
 561                 I915_WRITE(TRANSBCONF, dev_priv->saveTRANSBCONF);
 562                 I915_WRITE(TRANS_HTOTAL_B, dev_priv->saveTRANS_HTOTAL_B);
 563                 I915_WRITE(TRANS_HBLANK_B, dev_priv->saveTRANS_HBLANK_B);
 564                 I915_WRITE(TRANS_HSYNC_B, dev_priv->saveTRANS_HSYNC_B);
 565                 I915_WRITE(TRANS_VTOTAL_B, dev_priv->saveTRANS_VTOTAL_B);
 566                 I915_WRITE(TRANS_VBLANK_B, dev_priv->saveTRANS_VBLANK_B);
 567                 I915_WRITE(TRANS_VSYNC_B, dev_priv->saveTRANS_VSYNC_B);
 568         }
 569
 570         /* Restore plane info */
 571         I915_WRITE(DSPBSIZE, dev_priv->saveDSPBSIZE);
 572         I915_WRITE(DSPBPOS, dev_priv->saveDSPBPOS);
 573         I915_WRITE(PIPEBSRC, dev_priv->savePIPEBSRC);
 574         I915_WRITE(DSPBADDR, dev_priv->saveDSPBADDR);
 575         I915_WRITE(DSPBSTRIDE, dev_priv->saveDSPBSTRIDE);
 576         if (INTEL_INFO(dev)->gen >= 4) {
 577                 I915_WRITE(DSPBSURF, dev_priv->saveDSPBSURF);
 578                 I915_WRITE(DSPBTILEOFF, dev_priv->saveDSPBTILEOFF);
 579         }
 580
 581         I915_WRITE(PIPEBCONF, dev_priv->savePIPEBCONF);
 582
 583         i915_restore_palette(dev, PIPE_B);
 584         /* Enable the plane */
 585         I915_WRITE(DSPBCNTR, dev_priv->saveDSPBCNTR);
 586         I915_WRITE(DSPBADDR, I915_READ(DSPBADDR));
 587
 588         /* Cursor state */
 589         I915_WRITE(CURAPOS, dev_priv->saveCURAPOS);
 590         I915_WRITE(CURACNTR, dev_priv->saveCURACNTR);
 591         I915_WRITE(CURABASE, dev_priv->saveCURABASE);
 592         I915_WRITE(CURBPOS, dev_priv->saveCURBPOS);
 593         I915_WRITE(CURBCNTR, dev_priv->saveCURBCNTR);
 594         I915_WRITE(CURBBASE, dev_priv->saveCURBBASE);
 595         if (IS_GEN2(dev))
 596                 I915_WRITE(CURSIZE, dev_priv->saveCURSIZE);
 597
 598         return;
 599 }
 600
 601 void i915_save_display(struct drm_device *dev)
 602 {
 603         struct drm_i915_private *dev_priv = dev->dev_private;
 604
 605         /* Display arbitration control */
 606         dev_priv->saveDSPARB = I915_READ(DSPARB);
 607
 608         /* This is only meaningful in non-KMS mode */
 609         /* Don't save them in KMS mode */
 610         i915_save_modeset_reg(dev);
 611
 612         /* CRT state */
 613         if (HAS_PCH_SPLIT(dev)) {
 614                 dev_priv->saveADPA = I915_READ(PCH_ADPA);
 615         } else {
 616                 dev_priv->saveADPA = I915_READ(ADPA);
 617         }
 618
 619         /* LVDS state */
 620         if (HAS_PCH_SPLIT(dev)) {
 621                 dev_priv->savePP_CONTROL = I915_READ(PCH_PP_CONTROL);
 622                 dev_priv->saveBLC_PWM_CTL = I915_READ(BLC_PWM_PCH_CTL1);
 623                 dev_priv->saveBLC_PWM_CTL2 = I915_READ(BLC_PWM_PCH_CTL2);
 624                 dev_priv->saveBLC_CPU_PWM_CTL = I915_READ(BLC_PWM_CPU_CTL);
 625                 dev_priv->saveBLC_CPU_PWM_CTL2 = I915_READ(BLC_PWM_CPU_CTL2);
 626                 dev_priv->saveLVDS = I915_READ(PCH_LVDS);
 627         } else {
 628                 dev_priv->savePP_CONTROL = I915_READ(PP_CONTROL);
 629                 dev_priv->savePFIT_PGM_RATIOS = I915_READ(PFIT_PGM_RATIOS);
 630                 dev_priv->saveBLC_PWM_CTL = I915_READ(BLC_PWM_CTL);
 631                 dev_priv->saveBLC_HIST_CTL = I915_READ(BLC_HIST_CTL);
 632                 if (INTEL_INFO(dev)->gen >= 4)
 633                         dev_priv->saveBLC_PWM_CTL2 = I915_READ(BLC_PWM_CTL2);
 634                 if (IS_MOBILE(dev) && !IS_I830(dev))
 635                         dev_priv->saveLVDS = I915_READ(LVDS);
 636         }
 637
 638         if (!IS_I830(dev) && !IS_845G(dev) && !HAS_PCH_SPLIT(dev))
 639                 dev_priv->savePFIT_CONTROL = I915_READ(PFIT_CONTROL);
 640
 641         if (HAS_PCH_SPLIT(dev)) {
 642                 dev_priv->savePP_ON_DELAYS = I915_READ(PCH_PP_ON_DELAYS);
 643                 dev_priv->savePP_OFF_DELAYS = I915_READ(PCH_PP_OFF_DELAYS);
 644                 dev_priv->savePP_DIVISOR = I915_READ(PCH_PP_DIVISOR);
 645         } else {
 646                 dev_priv->savePP_ON_DELAYS = I915_READ(PP_ON_DELAYS);
 647                 dev_priv->savePP_OFF_DELAYS = I915_READ(PP_OFF_DELAYS);
 648                 dev_priv->savePP_DIVISOR = I915_READ(PP_DIVISOR);
 649         }
 650
 651         /* Display Port state */
 652         if (SUPPORTS_INTEGRATED_DP(dev)) {
 653                 dev_priv->saveDP_B = I915_READ(DP_B);
 654                 dev_priv->saveDP_C = I915_READ(DP_C);
 655                 dev_priv->saveDP_D = I915_READ(DP_D);
 656                 dev_priv->savePIPEA_GMCH_DATA_M = I915_READ(PIPEA_GMCH_DATA_M);
 657                 dev_priv->savePIPEB_GMCH_DATA_M = I915_READ(PIPEB_GMCH_DATA_M);
 658                 dev_priv->savePIPEA_GMCH_DATA_N = I915_READ(PIPEA_GMCH_DATA_N);
 659                 dev_priv->savePIPEB_GMCH_DATA_N = I915_READ(PIPEB_GMCH_DATA_N);
 660                 dev_priv->savePIPEA_DP_LINK_M = I915_READ(PIPEA_DP_LINK_M);
 661                 dev_priv->savePIPEB_DP_LINK_M = I915_READ(PIPEB_DP_LINK_M);
 662                 dev_priv->savePIPEA_DP_LINK_N = I915_READ(PIPEA_DP_LINK_N);
 663                 dev_priv->savePIPEB_DP_LINK_N = I915_READ(PIPEB_DP_LINK_N);
 664         }
 665         /* FIXME: save TV & SDVO state */
 666
 667         /* Only save FBC state on the platform that supports FBC */
 668         if (I915_HAS_FBC(dev)) {
 669                 if (HAS_PCH_SPLIT(dev)) {
 670                         dev_priv->saveDPFC_CB_BASE = I915_READ(ILK_DPFC_CB_BASE);
 671                 } else if (IS_GM45(dev)) {
 672                         dev_priv->saveDPFC_CB_BASE = I915_READ(DPFC_CB_BASE);
 673                 } else {
 674                         dev_priv->saveFBC_CFB_BASE = I915_READ(FBC_CFB_BASE);
 675                         dev_priv->saveFBC_LL_BASE = I915_READ(FBC_LL_BASE);
 676                         dev_priv->saveFBC_CONTROL2 = I915_READ(FBC_CONTROL2);
 677                         dev_priv->saveFBC_CONTROL = I915_READ(FBC_CONTROL);
 678                 }
 679         }
 680
 681         /* VGA state */
 682         dev_priv->saveVGA0 = I915_READ(VGA0);
 683         dev_priv->saveVGA1 = I915_READ(VGA1);
 684         dev_priv->saveVGA_PD = I915_READ(VGA_PD);
 685         if (HAS_PCH_SPLIT(dev))
 686                 dev_priv->saveVGACNTRL = I915_READ(CPU_VGACNTRL);
 687         else
 688                 dev_priv->saveVGACNTRL = I915_READ(VGACNTRL);
 689
 690         i915_save_vga(dev);
 691 }
 692
 693 void i915_restore_display(struct drm_device *dev)
 694 {
 695         struct drm_i915_private *dev_priv = dev->dev_private;
 696
 697         /* Display arbitration */
 698         I915_WRITE(DSPARB, dev_priv->saveDSPARB);
 699
 700         /* Display port ratios (must be done before clock is set) */
 701         if (SUPPORTS_INTEGRATED_DP(dev)) {
 702                 I915_WRITE(PIPEA_GMCH_DATA_M, dev_priv->savePIPEA_GMCH_DATA_M);
 703                 I915_WRITE(PIPEB_GMCH_DATA_M, dev_priv->savePIPEB_GMCH_DATA_M);
 704                 I915_WRITE(PIPEA_GMCH_DATA_N, dev_priv->savePIPEA_GMCH_DATA_N);
 705                 I915_WRITE(PIPEB_GMCH_DATA_N, dev_priv->savePIPEB_GMCH_DATA_N);
 706                 I915_WRITE(PIPEA_DP_LINK_M, dev_priv->savePIPEA_DP_LINK_M);
 707                 I915_WRITE(PIPEB_DP_LINK_M, dev_priv->savePIPEB_DP_LINK_M);
 708                 I915_WRITE(PIPEA_DP_LINK_N, dev_priv->savePIPEA_DP_LINK_N);
 709                 I915_WRITE(PIPEB_DP_LINK_N, dev_priv->savePIPEB_DP_LINK_N);
 710         }
 711
 712         /* This is only meaningful in non-KMS mode */
 713         /* Don't restore them in KMS mode */
 714         i915_restore_modeset_reg(dev);
 715
 716         /* CRT state */
 717         if (HAS_PCH_SPLIT(dev))
 718                 I915_WRITE(PCH_ADPA, dev_priv->saveADPA);
 719         else
 720                 I915_WRITE(ADPA, dev_priv->saveADPA);
 721
 722         /* LVDS state */
 723         if (INTEL_INFO(dev)->gen >= 4 && !HAS_PCH_SPLIT(dev))
 724                 I915_WRITE(BLC_PWM_CTL2, dev_priv->saveBLC_PWM_CTL2);
 725
 726         if (HAS_PCH_SPLIT(dev)) {
 727                 I915_WRITE(PCH_LVDS, dev_priv->saveLVDS);
 728         } else if (IS_MOBILE(dev) && !IS_I830(dev))
 729                 I915_WRITE(LVDS, dev_priv->saveLVDS);
 730
 731         if (!IS_I830(dev) && !IS_845G(dev) && !HAS_PCH_SPLIT(dev))
 732                 I915_WRITE(PFIT_CONTROL, dev_priv->savePFIT_CONTROL);
 733
 734         if (HAS_PCH_SPLIT(dev)) {
 735                 I915_WRITE(BLC_PWM_PCH_CTL1, dev_priv->saveBLC_PWM_CTL);
 736                 I915_WRITE(BLC_PWM_PCH_CTL2, dev_priv->saveBLC_PWM_CTL2);
 737                 I915_WRITE(BLC_PWM_CPU_CTL, dev_priv->saveBLC_CPU_PWM_CTL);
 738                 I915_WRITE(BLC_PWM_CPU_CTL2, dev_priv->saveBLC_CPU_PWM_CTL2);
 739                 I915_WRITE(PCH_PP_ON_DELAYS, dev_priv->savePP_ON_DELAYS);
 740                 I915_WRITE(PCH_PP_OFF_DELAYS, dev_priv->savePP_OFF_DELAYS);
 741                 I915_WRITE(PCH_PP_DIVISOR, dev_priv->savePP_DIVISOR);
 742                 I915_WRITE(PCH_PP_CONTROL, dev_priv->savePP_CONTROL);
 743                 I915_WRITE(RSTDBYCTL,
 744                            dev_priv->saveMCHBAR_RENDER_STANDBY);
 745         } else {
 746                 I915_WRITE(PFIT_PGM_RATIOS, dev_priv->savePFIT_PGM_RATIOS);
 747                 I915_WRITE(BLC_PWM_CTL, dev_priv->saveBLC_PWM_CTL);
 748                 I915_WRITE(BLC_HIST_CTL, dev_priv->saveBLC_HIST_CTL);
 749                 I915_WRITE(PP_ON_DELAYS, dev_priv->savePP_ON_DELAYS);
 750                 I915_WRITE(PP_OFF_DELAYS, dev_priv->savePP_OFF_DELAYS);
 751                 I915_WRITE(PP_DIVISOR, dev_priv->savePP_DIVISOR);
 752                 I915_WRITE(PP_CONTROL, dev_priv->savePP_CONTROL);
 753         }
 754
 755         /* Display Port state */
 756         if (SUPPORTS_INTEGRATED_DP(dev)) {
 757                 I915_WRITE(DP_B, dev_priv->saveDP_B);
 758                 I915_WRITE(DP_C, dev_priv->saveDP_C);
 759                 I915_WRITE(DP_D, dev_priv->saveDP_D);
 760         }
 761         /* FIXME: restore TV & SDVO state */
 762
 763         /* only restore FBC info on the platform that supports FBC*/
 764         if (I915_HAS_FBC(dev)) {
 765                 if (HAS_PCH_SPLIT(dev)) {
 766                         ironlake_disable_fbc(dev);
 767                         I915_WRITE(ILK_DPFC_CB_BASE, dev_priv->saveDPFC_CB_BASE);
 768                 } else if (IS_GM45(dev)) {
 769                         g4x_disable_fbc(dev);
 770                         I915_WRITE(DPFC_CB_BASE, dev_priv->saveDPFC_CB_BASE);
 771                 } else {
 772                         i8xx_disable_fbc(dev);
 773                         I915_WRITE(FBC_CFB_BASE, dev_priv->saveFBC_CFB_BASE);
 774                         I915_WRITE(FBC_LL_BASE, dev_priv->saveFBC_LL_BASE);
 775                         I915_WRITE(FBC_CONTROL2, dev_priv->saveFBC_CONTROL2);
 776                         I915_WRITE(FBC_CONTROL, dev_priv->saveFBC_CONTROL);
 777                 }
 778         }
 779         /* VGA state */
 780         if (HAS_PCH_SPLIT(dev))
 781                 I915_WRITE(CPU_VGACNTRL, dev_priv->saveVGACNTRL);
 782         else
 783                 I915_WRITE(VGACNTRL, dev_priv->saveVGACNTRL);
 784         I915_WRITE(VGA0, dev_priv->saveVGA0);
 785         I915_WRITE(VGA1, dev_priv->saveVGA1);
 786         I915_WRITE(VGA_PD, dev_priv->saveVGA_PD);
 787         POSTING_READ(VGA_PD);
 788         udelay(150);
 789
 790         i915_restore_vga(dev);
 791 }
 792
 793 int i915_save_state(struct drm_device *dev)
 794 {
 795         struct drm_i915_private *dev_priv = dev->dev_private;
 796         int i;
 797
 798         pci_read_config_byte(dev->pdev, LBB, &dev_priv->saveLBB);
 799
 800         /* Hardware status page */
 801         dev_priv->saveHWS = I915_READ(HWS_PGA);
 802
 803         i915_save_display(dev);
 804
 805         /* Interrupt state */
 806         if (HAS_PCH_SPLIT(dev)) {
 807                 dev_priv->saveDEIER = I915_READ(DEIER);
 808                 dev_priv->saveDEIMR = I915_READ(DEIMR);
 809                 dev_priv->saveGTIER = I915_READ(GTIER);
 810                 dev_priv->saveGTIMR = I915_READ(GTIMR);
 811                 dev_priv->saveFDI_RXA_IMR = I915_READ(FDI_RXA_IMR);
 812                 dev_priv->saveFDI_RXB_IMR = I915_READ(FDI_RXB_IMR);
 813                 dev_priv->saveMCHBAR_RENDER_STANDBY =
 814                         I915_READ(RSTDBYCTL);
 815         } else {
 816                 dev_priv->saveIER = I915_READ(IER);
 817                 dev_priv->saveIMR = I915_READ(IMR);
 818         }
 819
 820         if (IS_IRONLAKE_M(dev))
 821                 ironlake_disable_drps(dev);
 822         if (IS_GEN6(dev))
 823                 gen6_disable_rps(dev);
 824
 825         /* Cache mode state */
 826         dev_priv->saveCACHE_MODE_0 = I915_READ(CACHE_MODE_0);
 827
 828         /* Memory Arbitration state */
 829         dev_priv->saveMI_ARB_STATE = I915_READ(MI_ARB_STATE);
 830
 831         /* Scratch space */
 832         for (i = 0; i < 16; i++) {
 833                 dev_priv->saveSWF0[i] = I915_READ(SWF00 + (i << 2));
 834                 dev_priv->saveSWF1[i] = I915_READ(SWF10 + (i << 2));
 835         }
 836         for (i = 0; i < 3; i++)
 837                 dev_priv->saveSWF2[i] = I915_READ(SWF30 + (i << 2));
 838
 839         return 0;
 840 }
 841
 842 int i915_restore_state(struct drm_device *dev)
 843 {
 844         struct drm_i915_private *dev_priv = dev->dev_private;
 845         int i;
 846
 847         pci_write_config_byte(dev->pdev, LBB, dev_priv->saveLBB);
 848
 849         /* Hardware status page */
 850         I915_WRITE(HWS_PGA, dev_priv->saveHWS);
 851
 852         i915_restore_display(dev);
 853
 854         /* Interrupt state */
 855         if (HAS_PCH_SPLIT(dev)) {
 856                 I915_WRITE(DEIER, dev_priv->saveDEIER);
 857                 I915_WRITE(DEIMR, dev_priv->saveDEIMR);
 858                 I915_WRITE(GTIER, dev_priv->saveGTIER);
 859                 I915_WRITE(GTIMR, dev_priv->saveGTIMR);
 860                 I915_WRITE(FDI_RXA_IMR, dev_priv->saveFDI_RXA_IMR);
 861                 I915_WRITE(FDI_RXB_IMR, dev_priv->saveFDI_RXB_IMR);
 862         } else {
 863                 I915_WRITE (IER, dev_priv->saveIER);
 864                 I915_WRITE (IMR,  dev_priv->saveIMR);
 865         }
 866
 867         /* Clock gating state */
 868         intel_enable_clock_gating(dev);
 869
 870         if (IS_IRONLAKE_M(dev)) {
 871                 ironlake_enable_drps(dev);
 872                 intel_init_emon(dev);
 873         }
 874
 875         if (IS_GEN6(dev))
 876                 gen6_enable_rps(dev_priv);
 877
 878         /* Cache mode state */
 879         I915_WRITE (CACHE_MODE_0, dev_priv->saveCACHE_MODE_0 | 0xffff0000);
 880
 881         /* Memory arbitration state */
 882         I915_WRITE (MI_ARB_STATE, dev_priv->saveMI_ARB_STATE | 0xffff0000);
 883
 884         for (i = 0; i < 16; i++) {
 885                 I915_WRITE(SWF00 + (i << 2), dev_priv->saveSWF0[i]);
 886                 I915_WRITE(SWF10 + (i << 2), dev_priv->saveSWF1[i]);
 887         }
 888         for (i = 0; i < 3; i++)
 889                 I915_WRITE(SWF30 + (i << 2), dev_priv->saveSWF2[i]);
 890
 891         intel_i2c_reset(dev);
 892
 893         return 0;
 894 }