sys/dev/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  * $FreeBSD: src/sys/dev/drm2/i915/i915_suspend.c,v 1.1 2012/05/22 11:07:44 kib Exp $
  27  */
  28
  29 #include <drm/drmP.h>
  30 #include <drm/i915_drm.h>
  31 #include "intel_drv.h"
  32
  33 static bool i915_pipe_enabled(struct drm_device *dev, enum i915_pipe pipe)
  34 {
  35         struct drm_i915_private *dev_priv = dev->dev_private;
  36         u32     dpll_reg;
  37
  38         /* On IVB, 3rd pipe shares PLL with another one */
  39         if (pipe > 1)
  40                 return false;
  41
  42         if (HAS_PCH_SPLIT(dev))
  43                 dpll_reg = PCH_DPLL(pipe);
  44         else
  45                 dpll_reg = (pipe == PIPE_A) ? _DPLL_A : _DPLL_B;
  46
  47         return (I915_READ(dpll_reg) & DPLL_VCO_ENABLE);
  48 }
  49
  50 static void i915_save_palette(struct drm_device *dev, enum i915_pipe pipe)
  51 {
  52         struct drm_i915_private *dev_priv = dev->dev_private;
  53         unsigned long reg = (pipe == PIPE_A ? _PALETTE_A : _PALETTE_B);
  54         u32 *array;
  55         int i;
  56
  57         if (!i915_pipe_enabled(dev, pipe))
  58                 return;
  59
  60         if (HAS_PCH_SPLIT(dev))
  61                 reg = (pipe == PIPE_A) ? _LGC_PALETTE_A : _LGC_PALETTE_B;
  62
  63         if (pipe == PIPE_A)
  64                 array = dev_priv->save_palette_a;
  65         else
  66                 array = dev_priv->save_palette_b;
  67
  68         for (i = 0; i < 256; i++)
  69                 array[i] = I915_READ(reg + (i << 2));
  70 }
  71
  72 static void i915_restore_palette(struct drm_device *dev, enum i915_pipe pipe)
  73 {
  74         struct drm_i915_private *dev_priv = dev->dev_private;
  75         unsigned long reg = (pipe == PIPE_A ? _PALETTE_A : _PALETTE_B);
  76         u32 *array;
  77         int i;
  78
  79         if (!i915_pipe_enabled(dev, pipe))
  80                 return;
  81
  82         if (HAS_PCH_SPLIT(dev))
  83                 reg = (pipe == PIPE_A) ? _LGC_PALETTE_A : _LGC_PALETTE_B;
  84
  85         if (pipe == PIPE_A)
  86                 array = dev_priv->save_palette_a;
  87         else
  88                 array = dev_priv->save_palette_b;
  89
  90         for (i = 0; i < 256; i++)
  91                 I915_WRITE(reg + (i << 2), array[i]);
  92 }
  93
  94 static u8 i915_read_indexed(struct drm_device *dev, u16 index_port, u16 data_port, u8 reg)
  95 {
  96         struct drm_i915_private *dev_priv = dev->dev_private;
  97
  98         I915_WRITE8(index_port, reg);
  99         return I915_READ8(data_port);
 100 }
 101
 102 static u8 i915_read_ar(struct drm_device *dev, u16 st01, u8 reg, u16 palette_enable)
 103 {
 104         struct drm_i915_private *dev_priv = dev->dev_private;
 105
 106         I915_READ8(st01);
 107         I915_WRITE8(VGA_AR_INDEX, palette_enable | reg);
 108         return I915_READ8(VGA_AR_DATA_READ);
 109 }
 110
 111 static void i915_write_ar(struct drm_device *dev, u16 st01, u8 reg, u8 val, u16 palette_enable)
 112 {
 113         struct drm_i915_private *dev_priv = dev->dev_private;
 114
 115         I915_READ8(st01);
 116         I915_WRITE8(VGA_AR_INDEX, palette_enable | reg);
 117         I915_WRITE8(VGA_AR_DATA_WRITE, val);
 118 }
 119
 120 static void i915_write_indexed(struct drm_device *dev, u16 index_port, u16 data_port, u8 reg, u8 val)
 121 {
 122         struct drm_i915_private *dev_priv = dev->dev_private;
 123
 124         I915_WRITE8(index_port, reg);
 125         I915_WRITE8(data_port, val);
 126 }
 127
 128 static void i915_save_vga(struct drm_device *dev)
 129 {
 130         struct drm_i915_private *dev_priv = dev->dev_private;
 131         int i;
 132         u16 cr_index, cr_data, st01;
 133
 134         /* VGA color palette registers */
 135         dev_priv->saveDACMASK = I915_READ8(VGA_DACMASK);
 136
 137         /* MSR bits */
 138         dev_priv->saveMSR = I915_READ8(VGA_MSR_READ);
 139         if (dev_priv->saveMSR & VGA_MSR_CGA_MODE) {
 140                 cr_index = VGA_CR_INDEX_CGA;
 141                 cr_data = VGA_CR_DATA_CGA;
 142                 st01 = VGA_ST01_CGA;
 143         } else {
 144                 cr_index = VGA_CR_INDEX_MDA;
 145                 cr_data = VGA_CR_DATA_MDA;
 146                 st01 = VGA_ST01_MDA;
 147         }
 148
 149         /* CRT controller regs */
 150         i915_write_indexed(dev, cr_index, cr_data, 0x11,
 151                            i915_read_indexed(dev, cr_index, cr_data, 0x11) &
 152                            (~0x80));
 153         for (i = 0; i <= 0x24; i++)
 154                 dev_priv->saveCR[i] =
 155                         i915_read_indexed(dev, cr_index, cr_data, i);
 156         /* Make sure we don't turn off CR group 0 writes */
 157         dev_priv->saveCR[0x11] &= ~0x80;
 158
 159         /* Attribute controller registers */
 160         I915_READ8(st01);
 161         dev_priv->saveAR_INDEX = I915_READ8(VGA_AR_INDEX);
 162         for (i = 0; i <= 0x14; i++)
 163                 dev_priv->saveAR[i] = i915_read_ar(dev, st01, i, 0);
 164         I915_READ8(st01);
 165         I915_WRITE8(VGA_AR_INDEX, dev_priv->saveAR_INDEX);
 166         I915_READ8(st01);
 167
 168         /* Graphics controller registers */
 169         for (i = 0; i < 9; i++)
 170                 dev_priv->saveGR[i] =
 171                         i915_read_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, i);
 172
 173         dev_priv->saveGR[0x10] =
 174                 i915_read_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x10);
 175         dev_priv->saveGR[0x11] =
 176                 i915_read_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x11);
 177         dev_priv->saveGR[0x18] =
 178                 i915_read_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x18);
 179
 180         /* Sequencer registers */
 181         for (i = 0; i < 8; i++)
 182                 dev_priv->saveSR[i] =
 183                         i915_read_indexed(dev, VGA_SR_INDEX, VGA_SR_DATA, i);
 184 }
 185
 186 static void i915_restore_vga(struct drm_device *dev)
 187 {
 188         struct drm_i915_private *dev_priv = dev->dev_private;
 189         int i;
 190         u16 cr_index, cr_data, st01;
 191
 192         /* MSR bits */
 193         I915_WRITE8(VGA_MSR_WRITE, dev_priv->saveMSR);
 194         if (dev_priv->saveMSR & VGA_MSR_CGA_MODE) {
 195                 cr_index = VGA_CR_INDEX_CGA;
 196                 cr_data = VGA_CR_DATA_CGA;
 197                 st01 = VGA_ST01_CGA;
 198         } else {
 199                 cr_index = VGA_CR_INDEX_MDA;
 200                 cr_data = VGA_CR_DATA_MDA;
 201                 st01 = VGA_ST01_MDA;
 202         }
 203
 204         /* Sequencer registers, don't write SR07 */
 205         for (i = 0; i < 7; i++)
 206                 i915_write_indexed(dev, VGA_SR_INDEX, VGA_SR_DATA, i,
 207                                    dev_priv->saveSR[i]);
 208
 209         /* CRT controller regs */
 210         /* Enable CR group 0 writes */
 211         i915_write_indexed(dev, cr_index, cr_data, 0x11, dev_priv->saveCR[0x11]);
 212         for (i = 0; i <= 0x24; i++)
 213                 i915_write_indexed(dev, cr_index, cr_data, i, dev_priv->saveCR[i]);
 214
 215         /* Graphics controller regs */
 216         for (i = 0; i < 9; i++)
 217                 i915_write_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, i,
 218                                    dev_priv->saveGR[i]);
 219
 220         i915_write_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x10,
 221                            dev_priv->saveGR[0x10]);
 222         i915_write_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x11,
 223                            dev_priv->saveGR[0x11]);
 224         i915_write_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x18,
 225                            dev_priv->saveGR[0x18]);
 226
 227         /* Attribute controller registers */
 228         I915_READ8(st01); /* switch back to index mode */
 229         for (i = 0; i <= 0x14; i++)
 230                 i915_write_ar(dev, st01, i, dev_priv->saveAR[i], 0);
 231         I915_READ8(st01); /* switch back to index mode */
 232         I915_WRITE8(VGA_AR_INDEX, dev_priv->saveAR_INDEX | 0x20);
 233         I915_READ8(st01);
 234
 235         /* VGA color palette registers */
 236         I915_WRITE8(VGA_DACMASK, dev_priv->saveDACMASK);
 237 }
 238
 239 static void i915_save_modeset_reg(struct drm_device *dev)
 240 {
 241         struct drm_i915_private *dev_priv = dev->dev_private;
 242         int i;
 243
 244         if (drm_core_check_feature(dev, DRIVER_MODESET))
 245                 return;
 246
 247         /* Cursor state */
 248         dev_priv->saveCURACNTR = I915_READ(_CURACNTR);
 249         dev_priv->saveCURAPOS = I915_READ(_CURAPOS);
 250         dev_priv->saveCURABASE = I915_READ(_CURABASE);
 251         dev_priv->saveCURBCNTR = I915_READ(_CURBCNTR);
 252         dev_priv->saveCURBPOS = I915_READ(_CURBPOS);
 253         dev_priv->saveCURBBASE = I915_READ(_CURBBASE);
 254         if (IS_GEN2(dev))
 255                 dev_priv->saveCURSIZE = I915_READ(CURSIZE);
 256
 257         if (HAS_PCH_SPLIT(dev)) {
 258                 dev_priv->savePCH_DREF_CONTROL = I915_READ(PCH_DREF_CONTROL);
 259                 dev_priv->saveDISP_ARB_CTL = I915_READ(DISP_ARB_CTL);
 260         }
 261
 262         /* Pipe & plane A info */
 263         dev_priv->savePIPEACONF = I915_READ(_PIPEACONF);
 264         dev_priv->savePIPEASRC = I915_READ(_PIPEASRC);
 265         if (HAS_PCH_SPLIT(dev)) {
 266                 dev_priv->saveFPA0 = I915_READ(_PCH_FPA0);
 267                 dev_priv->saveFPA1 = I915_READ(_PCH_FPA1);
 268                 dev_priv->saveDPLL_A = I915_READ(_PCH_DPLL_A);
 269         } else {
 270                 dev_priv->saveFPA0 = I915_READ(_FPA0);
 271                 dev_priv->saveFPA1 = I915_READ(_FPA1);
 272                 dev_priv->saveDPLL_A = I915_READ(_DPLL_A);
 273         }
 274         if (INTEL_INFO(dev)->gen >= 4 && !HAS_PCH_SPLIT(dev))
 275                 dev_priv->saveDPLL_A_MD = I915_READ(_DPLL_A_MD);
 276         dev_priv->saveHTOTAL_A = I915_READ(_HTOTAL_A);
 277         dev_priv->saveHBLANK_A = I915_READ(_HBLANK_A);
 278         dev_priv->saveHSYNC_A = I915_READ(_HSYNC_A);
 279         dev_priv->saveVTOTAL_A = I915_READ(_VTOTAL_A);
 280         dev_priv->saveVBLANK_A = I915_READ(_VBLANK_A);
 281         dev_priv->saveVSYNC_A = I915_READ(_VSYNC_A);
 282         if (!HAS_PCH_SPLIT(dev))
 283                 dev_priv->saveBCLRPAT_A = I915_READ(_BCLRPAT_A);
 284
 285         if (HAS_PCH_SPLIT(dev)) {
 286                 dev_priv->savePIPEA_DATA_M1 = I915_READ(_PIPEA_DATA_M1);
 287                 dev_priv->savePIPEA_DATA_N1 = I915_READ(_PIPEA_DATA_N1);
 288                 dev_priv->savePIPEA_LINK_M1 = I915_READ(_PIPEA_LINK_M1);
 289                 dev_priv->savePIPEA_LINK_N1 = I915_READ(_PIPEA_LINK_N1);
 290
 291                 dev_priv->saveFDI_TXA_CTL = I915_READ(_FDI_TXA_CTL);
 292                 dev_priv->saveFDI_RXA_CTL = I915_READ(_FDI_RXA_CTL);
 293
 294                 dev_priv->savePFA_CTL_1 = I915_READ(_PFA_CTL_1);
 295                 dev_priv->savePFA_WIN_SZ = I915_READ(_PFA_WIN_SZ);
 296                 dev_priv->savePFA_WIN_POS = I915_READ(_PFA_WIN_POS);
 297
 298                 dev_priv->saveTRANSACONF = I915_READ(_TRANSACONF);
 299                 dev_priv->saveTRANS_HTOTAL_A = I915_READ(_TRANS_HTOTAL_A);
 300                 dev_priv->saveTRANS_HBLANK_A = I915_READ(_TRANS_HBLANK_A);
 301                 dev_priv->saveTRANS_HSYNC_A = I915_READ(_TRANS_HSYNC_A);
 302                 dev_priv->saveTRANS_VTOTAL_A = I915_READ(_TRANS_VTOTAL_A);
 303                 dev_priv->saveTRANS_VBLANK_A = I915_READ(_TRANS_VBLANK_A);
 304                 dev_priv->saveTRANS_VSYNC_A = I915_READ(_TRANS_VSYNC_A);
 305         }
 306
 307         dev_priv->saveDSPACNTR = I915_READ(_DSPACNTR);
 308         dev_priv->saveDSPASTRIDE = I915_READ(_DSPASTRIDE);
 309         dev_priv->saveDSPASIZE = I915_READ(_DSPASIZE);
 310         dev_priv->saveDSPAPOS = I915_READ(_DSPAPOS);
 311         dev_priv->saveDSPAADDR = I915_READ(_DSPAADDR);
 312         if (INTEL_INFO(dev)->gen >= 4) {
 313                 dev_priv->saveDSPASURF = I915_READ(_DSPASURF);
 314                 dev_priv->saveDSPATILEOFF = I915_READ(_DSPATILEOFF);
 315         }
 316         i915_save_palette(dev, PIPE_A);
 317         dev_priv->savePIPEASTAT = I915_READ(_PIPEASTAT);
 318
 319         /* Pipe & plane B info */
 320         dev_priv->savePIPEBCONF = I915_READ(_PIPEBCONF);
 321         dev_priv->savePIPEBSRC = I915_READ(_PIPEBSRC);
 322         if (HAS_PCH_SPLIT(dev)) {
 323                 dev_priv->saveFPB0 = I915_READ(_PCH_FPB0);
 324                 dev_priv->saveFPB1 = I915_READ(_PCH_FPB1);
 325                 dev_priv->saveDPLL_B = I915_READ(_PCH_DPLL_B);
 326         } else {
 327                 dev_priv->saveFPB0 = I915_READ(_FPB0);
 328                 dev_priv->saveFPB1 = I915_READ(_FPB1);
 329                 dev_priv->saveDPLL_B = I915_READ(_DPLL_B);
 330         }
 331         if (INTEL_INFO(dev)->gen >= 4 && !HAS_PCH_SPLIT(dev))
 332                 dev_priv->saveDPLL_B_MD = I915_READ(_DPLL_B_MD);
 333         dev_priv->saveHTOTAL_B = I915_READ(_HTOTAL_B);
 334         dev_priv->saveHBLANK_B = I915_READ(_HBLANK_B);
 335         dev_priv->saveHSYNC_B = I915_READ(_HSYNC_B);
 336         dev_priv->saveVTOTAL_B = I915_READ(_VTOTAL_B);
 337         dev_priv->saveVBLANK_B = I915_READ(_VBLANK_B);
 338         dev_priv->saveVSYNC_B = I915_READ(_VSYNC_B);
 339         if (!HAS_PCH_SPLIT(dev))
 340                 dev_priv->saveBCLRPAT_B = I915_READ(_BCLRPAT_B);
 341
 342         if (HAS_PCH_SPLIT(dev)) {
 343                 dev_priv->savePIPEB_DATA_M1 = I915_READ(_PIPEB_DATA_M1);
 344                 dev_priv->savePIPEB_DATA_N1 = I915_READ(_PIPEB_DATA_N1);
 345                 dev_priv->savePIPEB_LINK_M1 = I915_READ(_PIPEB_LINK_M1);
 346                 dev_priv->savePIPEB_LINK_N1 = I915_READ(_PIPEB_LINK_N1);
 347
 348                 dev_priv->saveFDI_TXB_CTL = I915_READ(_FDI_TXB_CTL);
 349                 dev_priv->saveFDI_RXB_CTL = I915_READ(_FDI_RXB_CTL);
 350
 351                 dev_priv->savePFB_CTL_1 = I915_READ(_PFB_CTL_1);
 352                 dev_priv->savePFB_WIN_SZ = I915_READ(_PFB_WIN_SZ);
 353                 dev_priv->savePFB_WIN_POS = I915_READ(_PFB_WIN_POS);
 354
 355                 dev_priv->saveTRANSBCONF = I915_READ(_TRANSBCONF);
 356                 dev_priv->saveTRANS_HTOTAL_B = I915_READ(_TRANS_HTOTAL_B);
 357                 dev_priv->saveTRANS_HBLANK_B = I915_READ(_TRANS_HBLANK_B);
 358                 dev_priv->saveTRANS_HSYNC_B = I915_READ(_TRANS_HSYNC_B);
 359                 dev_priv->saveTRANS_VTOTAL_B = I915_READ(_TRANS_VTOTAL_B);
 360                 dev_priv->saveTRANS_VBLANK_B = I915_READ(_TRANS_VBLANK_B);
 361                 dev_priv->saveTRANS_VSYNC_B = I915_READ(_TRANS_VSYNC_B);
 362         }
 363
 364         dev_priv->saveDSPBCNTR = I915_READ(_DSPBCNTR);
 365         dev_priv->saveDSPBSTRIDE = I915_READ(_DSPBSTRIDE);
 366         dev_priv->saveDSPBSIZE = I915_READ(_DSPBSIZE);
 367         dev_priv->saveDSPBPOS = I915_READ(_DSPBPOS);
 368         dev_priv->saveDSPBADDR = I915_READ(_DSPBADDR);
 369         if (INTEL_INFO(dev)->gen >= 4) {
 370                 dev_priv->saveDSPBSURF = I915_READ(_DSPBSURF);
 371                 dev_priv->saveDSPBTILEOFF = I915_READ(_DSPBTILEOFF);
 372         }
 373         i915_save_palette(dev, PIPE_B);
 374         dev_priv->savePIPEBSTAT = I915_READ(_PIPEBSTAT);
 375
 376         /* Fences */
 377         switch (INTEL_INFO(dev)->gen) {
 378         case 7:
 379         case 6:
 380                 for (i = 0; i < 16; i++)
 381                         dev_priv->saveFENCE[i] = I915_READ64(FENCE_REG_SANDYBRIDGE_0 + (i * 8));
 382                 break;
 383         case 5:
 384         case 4:
 385                 for (i = 0; i < 16; i++)
 386                         dev_priv->saveFENCE[i] = I915_READ64(FENCE_REG_965_0 + (i * 8));
 387                 break;
 388         case 3:
 389                 if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))
 390                         for (i = 0; i < 8; i++)
 391                                 dev_priv->saveFENCE[i+8] = I915_READ(FENCE_REG_945_8 + (i * 4));
 392         case 2:
 393                 for (i = 0; i < 8; i++)
 394                         dev_priv->saveFENCE[i] = I915_READ(FENCE_REG_830_0 + (i * 4));
 395                 break;
 396         }
 397
 398         return;
 399 }
 400
 401 static void i915_restore_modeset_reg(struct drm_device *dev)
 402 {
 403         struct drm_i915_private *dev_priv = dev->dev_private;
 404         int dpll_a_reg, fpa0_reg, fpa1_reg;
 405         int dpll_b_reg, fpb0_reg, fpb1_reg;
 406         int i;
 407
 408         if (drm_core_check_feature(dev, DRIVER_MODESET))
 409                 return;
 410
 411         /* Fences */
 412         switch (INTEL_INFO(dev)->gen) {
 413         case 7:
 414         case 6:
 415                 for (i = 0; i < 16; i++)
 416                         I915_WRITE64(FENCE_REG_SANDYBRIDGE_0 + (i * 8), dev_priv->saveFENCE[i]);
 417                 break;
 418         case 5:
 419         case 4:
 420                 for (i = 0; i < 16; i++)
 421                         I915_WRITE64(FENCE_REG_965_0 + (i * 8), dev_priv->saveFENCE[i]);
 422                 break;
 423         case 3:
 424         case 2:
 425                 if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))
 426                         for (i = 0; i < 8; i++)
 427                                 I915_WRITE(FENCE_REG_945_8 + (i * 4), dev_priv->saveFENCE[i+8]);
 428                 for (i = 0; i < 8; i++)
 429                         I915_WRITE(FENCE_REG_830_0 + (i * 4), dev_priv->saveFENCE[i]);
 430                 break;
 431         }
 432
 433
 434         if (HAS_PCH_SPLIT(dev)) {
 435                 dpll_a_reg = _PCH_DPLL_A;
 436                 dpll_b_reg = _PCH_DPLL_B;
 437                 fpa0_reg = _PCH_FPA0;
 438                 fpb0_reg = _PCH_FPB0;
 439                 fpa1_reg = _PCH_FPA1;
 440                 fpb1_reg = _PCH_FPB1;
 441         } else {
 442                 dpll_a_reg = _DPLL_A;
 443                 dpll_b_reg = _DPLL_B;
 444                 fpa0_reg = _FPA0;
 445                 fpb0_reg = _FPB0;
 446                 fpa1_reg = _FPA1;
 447                 fpb1_reg = _FPB1;
 448         }
 449
 450         if (HAS_PCH_SPLIT(dev)) {
 451                 I915_WRITE(PCH_DREF_CONTROL, dev_priv->savePCH_DREF_CONTROL);
 452                 I915_WRITE(DISP_ARB_CTL, dev_priv->saveDISP_ARB_CTL);
 453         }
 454
 455         /* Pipe & plane A info */
 456         /* Prime the clock */
 457         if (dev_priv->saveDPLL_A & DPLL_VCO_ENABLE) {
 458                 I915_WRITE(dpll_a_reg, dev_priv->saveDPLL_A &
 459                            ~DPLL_VCO_ENABLE);
 460                 POSTING_READ(dpll_a_reg);
 461                 DRM_UDELAY(150);
 462         }
 463         I915_WRITE(fpa0_reg, dev_priv->saveFPA0);
 464         I915_WRITE(fpa1_reg, dev_priv->saveFPA1);
 465         /* Actually enable it */
 466         I915_WRITE(dpll_a_reg, dev_priv->saveDPLL_A);
 467         POSTING_READ(dpll_a_reg);
 468         DRM_UDELAY(150);
 469         if (INTEL_INFO(dev)->gen >= 4 && !HAS_PCH_SPLIT(dev)) {
 470                 I915_WRITE(_DPLL_A_MD, dev_priv->saveDPLL_A_MD);
 471                 POSTING_READ(_DPLL_A_MD);
 472         }
 473         DRM_UDELAY(150);
 474
 475         /* Restore mode */
 476         I915_WRITE(_HTOTAL_A, dev_priv->saveHTOTAL_A);
 477         I915_WRITE(_HBLANK_A, dev_priv->saveHBLANK_A);
 478         I915_WRITE(_HSYNC_A, dev_priv->saveHSYNC_A);
 479         I915_WRITE(_VTOTAL_A, dev_priv->saveVTOTAL_A);
 480         I915_WRITE(_VBLANK_A, dev_priv->saveVBLANK_A);
 481         I915_WRITE(_VSYNC_A, dev_priv->saveVSYNC_A);
 482         if (!HAS_PCH_SPLIT(dev))
 483                 I915_WRITE(_BCLRPAT_A, dev_priv->saveBCLRPAT_A);
 484
 485         if (HAS_PCH_SPLIT(dev)) {
 486                 I915_WRITE(_PIPEA_DATA_M1, dev_priv->savePIPEA_DATA_M1);
 487                 I915_WRITE(_PIPEA_DATA_N1, dev_priv->savePIPEA_DATA_N1);
 488                 I915_WRITE(_PIPEA_LINK_M1, dev_priv->savePIPEA_LINK_M1);
 489                 I915_WRITE(_PIPEA_LINK_N1, dev_priv->savePIPEA_LINK_N1);
 490
 491                 I915_WRITE(_FDI_RXA_CTL, dev_priv->saveFDI_RXA_CTL);
 492                 I915_WRITE(_FDI_TXA_CTL, dev_priv->saveFDI_TXA_CTL);
 493
 494                 I915_WRITE(_PFA_CTL_1, dev_priv->savePFA_CTL_1);
 495                 I915_WRITE(_PFA_WIN_SZ, dev_priv->savePFA_WIN_SZ);
 496                 I915_WRITE(_PFA_WIN_POS, dev_priv->savePFA_WIN_POS);
 497
 498                 I915_WRITE(_TRANSACONF, dev_priv->saveTRANSACONF);
 499                 I915_WRITE(_TRANS_HTOTAL_A, dev_priv->saveTRANS_HTOTAL_A);
 500                 I915_WRITE(_TRANS_HBLANK_A, dev_priv->saveTRANS_HBLANK_A);
 501                 I915_WRITE(_TRANS_HSYNC_A, dev_priv->saveTRANS_HSYNC_A);
 502                 I915_WRITE(_TRANS_VTOTAL_A, dev_priv->saveTRANS_VTOTAL_A);
 503                 I915_WRITE(_TRANS_VBLANK_A, dev_priv->saveTRANS_VBLANK_A);
 504                 I915_WRITE(_TRANS_VSYNC_A, dev_priv->saveTRANS_VSYNC_A);
 505         }
 506
 507         /* Restore plane info */
 508         I915_WRITE(_DSPASIZE, dev_priv->saveDSPASIZE);
 509         I915_WRITE(_DSPAPOS, dev_priv->saveDSPAPOS);
 510         I915_WRITE(_PIPEASRC, dev_priv->savePIPEASRC);
 511         I915_WRITE(_DSPAADDR, dev_priv->saveDSPAADDR);
 512         I915_WRITE(_DSPASTRIDE, dev_priv->saveDSPASTRIDE);
 513         if (INTEL_INFO(dev)->gen >= 4) {
 514                 I915_WRITE(_DSPASURF, dev_priv->saveDSPASURF);
 515                 I915_WRITE(_DSPATILEOFF, dev_priv->saveDSPATILEOFF);
 516         }
 517
 518         I915_WRITE(_PIPEACONF, dev_priv->savePIPEACONF);
 519
 520         i915_restore_palette(dev, PIPE_A);
 521         /* Enable the plane */
 522         I915_WRITE(_DSPACNTR, dev_priv->saveDSPACNTR);
 523         I915_WRITE(_DSPAADDR, I915_READ(_DSPAADDR));
 524
 525         /* Pipe & plane B info */
 526         if (dev_priv->saveDPLL_B & DPLL_VCO_ENABLE) {
 527                 I915_WRITE(dpll_b_reg, dev_priv->saveDPLL_B &
 528                            ~DPLL_VCO_ENABLE);
 529                 POSTING_READ(dpll_b_reg);
 530                 DRM_UDELAY(150);
 531         }
 532         I915_WRITE(fpb0_reg, dev_priv->saveFPB0);
 533         I915_WRITE(fpb1_reg, dev_priv->saveFPB1);
 534         /* Actually enable it */
 535         I915_WRITE(dpll_b_reg, dev_priv->saveDPLL_B);
 536         POSTING_READ(dpll_b_reg);
 537         DRM_UDELAY(150);
 538         if (INTEL_INFO(dev)->gen >= 4 && !HAS_PCH_SPLIT(dev)) {
 539                 I915_WRITE(_DPLL_B_MD, dev_priv->saveDPLL_B_MD);
 540                 POSTING_READ(_DPLL_B_MD);
 541         }
 542         DRM_UDELAY(150);
 543
 544         /* Restore mode */
 545         I915_WRITE(_HTOTAL_B, dev_priv->saveHTOTAL_B);
 546         I915_WRITE(_HBLANK_B, dev_priv->saveHBLANK_B);
 547         I915_WRITE(_HSYNC_B, dev_priv->saveHSYNC_B);
 548         I915_WRITE(_VTOTAL_B, dev_priv->saveVTOTAL_B);
 549         I915_WRITE(_VBLANK_B, dev_priv->saveVBLANK_B);
 550         I915_WRITE(_VSYNC_B, dev_priv->saveVSYNC_B);
 551         if (!HAS_PCH_SPLIT(dev))
 552                 I915_WRITE(_BCLRPAT_B, dev_priv->saveBCLRPAT_B);
 553
 554         if (HAS_PCH_SPLIT(dev)) {
 555                 I915_WRITE(_PIPEB_DATA_M1, dev_priv->savePIPEB_DATA_M1);
 556                 I915_WRITE(_PIPEB_DATA_N1, dev_priv->savePIPEB_DATA_N1);
 557                 I915_WRITE(_PIPEB_LINK_M1, dev_priv->savePIPEB_LINK_M1);
 558                 I915_WRITE(_PIPEB_LINK_N1, dev_priv->savePIPEB_LINK_N1);
 559
 560                 I915_WRITE(_FDI_RXB_CTL, dev_priv->saveFDI_RXB_CTL);
 561                 I915_WRITE(_FDI_TXB_CTL, dev_priv->saveFDI_TXB_CTL);
 562
 563                 I915_WRITE(_PFB_CTL_1, dev_priv->savePFB_CTL_1);
 564                 I915_WRITE(_PFB_WIN_SZ, dev_priv->savePFB_WIN_SZ);
 565                 I915_WRITE(_PFB_WIN_POS, dev_priv->savePFB_WIN_POS);
 566
 567                 I915_WRITE(_TRANSBCONF, dev_priv->saveTRANSBCONF);
 568                 I915_WRITE(_TRANS_HTOTAL_B, dev_priv->saveTRANS_HTOTAL_B);
 569                 I915_WRITE(_TRANS_HBLANK_B, dev_priv->saveTRANS_HBLANK_B);
 570                 I915_WRITE(_TRANS_HSYNC_B, dev_priv->saveTRANS_HSYNC_B);
 571                 I915_WRITE(_TRANS_VTOTAL_B, dev_priv->saveTRANS_VTOTAL_B);
 572                 I915_WRITE(_TRANS_VBLANK_B, dev_priv->saveTRANS_VBLANK_B);
 573                 I915_WRITE(_TRANS_VSYNC_B, dev_priv->saveTRANS_VSYNC_B);
 574         }
 575
 576         /* Restore plane info */
 577         I915_WRITE(_DSPBSIZE, dev_priv->saveDSPBSIZE);
 578         I915_WRITE(_DSPBPOS, dev_priv->saveDSPBPOS);
 579         I915_WRITE(_PIPEBSRC, dev_priv->savePIPEBSRC);
 580         I915_WRITE(_DSPBADDR, dev_priv->saveDSPBADDR);
 581         I915_WRITE(_DSPBSTRIDE, dev_priv->saveDSPBSTRIDE);
 582         if (INTEL_INFO(dev)->gen >= 4) {
 583                 I915_WRITE(_DSPBSURF, dev_priv->saveDSPBSURF);
 584                 I915_WRITE(_DSPBTILEOFF, dev_priv->saveDSPBTILEOFF);
 585         }
 586
 587         I915_WRITE(_PIPEBCONF, dev_priv->savePIPEBCONF);
 588
 589         i915_restore_palette(dev, PIPE_B);
 590         /* Enable the plane */
 591         I915_WRITE(_DSPBCNTR, dev_priv->saveDSPBCNTR);
 592         I915_WRITE(_DSPBADDR, I915_READ(_DSPBADDR));
 593
 594         /* Cursor state */
 595         I915_WRITE(_CURAPOS, dev_priv->saveCURAPOS);
 596         I915_WRITE(_CURACNTR, dev_priv->saveCURACNTR);
 597         I915_WRITE(_CURABASE, dev_priv->saveCURABASE);
 598         I915_WRITE(_CURBPOS, dev_priv->saveCURBPOS);
 599         I915_WRITE(_CURBCNTR, dev_priv->saveCURBCNTR);
 600         I915_WRITE(_CURBBASE, dev_priv->saveCURBBASE);
 601         if (IS_GEN2(dev))
 602                 I915_WRITE(CURSIZE, dev_priv->saveCURSIZE);
 603
 604         return;
 605 }
 606
 607 static void i915_save_display(struct drm_device *dev)
 608 {
 609         struct drm_i915_private *dev_priv = dev->dev_private;
 610
 611         /* Display arbitration control */
 612         dev_priv->saveDSPARB = I915_READ(DSPARB);
 613
 614         /* This is only meaningful in non-KMS mode */
 615         /* Don't save them in KMS mode */
 616         i915_save_modeset_reg(dev);
 617
 618         /* CRT state */
 619         if (HAS_PCH_SPLIT(dev)) {
 620                 dev_priv->saveADPA = I915_READ(PCH_ADPA);
 621         } else {
 622                 dev_priv->saveADPA = I915_READ(ADPA);
 623         }
 624
 625         /* LVDS state */
 626         if (HAS_PCH_SPLIT(dev)) {
 627                 dev_priv->savePP_CONTROL = I915_READ(PCH_PP_CONTROL);
 628                 dev_priv->saveBLC_PWM_CTL = I915_READ(BLC_PWM_PCH_CTL1);
 629                 dev_priv->saveBLC_PWM_CTL2 = I915_READ(BLC_PWM_PCH_CTL2);
 630                 dev_priv->saveBLC_CPU_PWM_CTL = I915_READ(BLC_PWM_CPU_CTL);
 631                 dev_priv->saveBLC_CPU_PWM_CTL2 = I915_READ(BLC_PWM_CPU_CTL2);
 632                 dev_priv->saveLVDS = I915_READ(PCH_LVDS);
 633         } else {
 634                 dev_priv->savePP_CONTROL = I915_READ(PP_CONTROL);
 635                 dev_priv->savePFIT_PGM_RATIOS = I915_READ(PFIT_PGM_RATIOS);
 636                 dev_priv->saveBLC_PWM_CTL = I915_READ(BLC_PWM_CTL);
 637                 dev_priv->saveBLC_HIST_CTL = I915_READ(BLC_HIST_CTL);
 638                 if (INTEL_INFO(dev)->gen >= 4)
 639                         dev_priv->saveBLC_PWM_CTL2 = I915_READ(BLC_PWM_CTL2);
 640                 if (IS_MOBILE(dev) && !IS_I830(dev))
 641                         dev_priv->saveLVDS = I915_READ(LVDS);
 642         }
 643
 644         if (!IS_I830(dev) && !IS_845G(dev) && !HAS_PCH_SPLIT(dev))
 645                 dev_priv->savePFIT_CONTROL = I915_READ(PFIT_CONTROL);
 646
 647         if (HAS_PCH_SPLIT(dev)) {
 648                 dev_priv->savePP_ON_DELAYS = I915_READ(PCH_PP_ON_DELAYS);
 649                 dev_priv->savePP_OFF_DELAYS = I915_READ(PCH_PP_OFF_DELAYS);
 650                 dev_priv->savePP_DIVISOR = I915_READ(PCH_PP_DIVISOR);
 651         } else {
 652                 dev_priv->savePP_ON_DELAYS = I915_READ(PP_ON_DELAYS);
 653                 dev_priv->savePP_OFF_DELAYS = I915_READ(PP_OFF_DELAYS);
 654                 dev_priv->savePP_DIVISOR = I915_READ(PP_DIVISOR);
 655         }
 656
 657         /* Display Port state */
 658         if (SUPPORTS_INTEGRATED_DP(dev)) {
 659                 dev_priv->saveDP_B = I915_READ(DP_B);
 660                 dev_priv->saveDP_C = I915_READ(DP_C);
 661                 dev_priv->saveDP_D = I915_READ(DP_D);
 662                 dev_priv->savePIPEA_GMCH_DATA_M = I915_READ(_PIPEA_GMCH_DATA_M);
 663                 dev_priv->savePIPEB_GMCH_DATA_M = I915_READ(_PIPEB_GMCH_DATA_M);
 664                 dev_priv->savePIPEA_GMCH_DATA_N = I915_READ(_PIPEA_GMCH_DATA_N);
 665                 dev_priv->savePIPEB_GMCH_DATA_N = I915_READ(_PIPEB_GMCH_DATA_N);
 666                 dev_priv->savePIPEA_DP_LINK_M = I915_READ(_PIPEA_DP_LINK_M);
 667                 dev_priv->savePIPEB_DP_LINK_M = I915_READ(_PIPEB_DP_LINK_M);
 668                 dev_priv->savePIPEA_DP_LINK_N = I915_READ(_PIPEA_DP_LINK_N);
 669                 dev_priv->savePIPEB_DP_LINK_N = I915_READ(_PIPEB_DP_LINK_N);
 670         }
 671         /* FIXME: save TV & SDVO state */
 672
 673         /* Only save FBC state on the platform that supports FBC */
 674         if (I915_HAS_FBC(dev)) {
 675                 if (HAS_PCH_SPLIT(dev)) {
 676                         dev_priv->saveDPFC_CB_BASE = I915_READ(ILK_DPFC_CB_BASE);
 677                 } else if (IS_GM45(dev)) {
 678                         dev_priv->saveDPFC_CB_BASE = I915_READ(DPFC_CB_BASE);
 679                 } else {
 680                         dev_priv->saveFBC_CFB_BASE = I915_READ(FBC_CFB_BASE);
 681                         dev_priv->saveFBC_LL_BASE = I915_READ(FBC_LL_BASE);
 682                         dev_priv->saveFBC_CONTROL2 = I915_READ(FBC_CONTROL2);
 683                         dev_priv->saveFBC_CONTROL = I915_READ(FBC_CONTROL);
 684                 }
 685         }
 686
 687         /* VGA state */
 688         dev_priv->saveVGA0 = I915_READ(VGA0);
 689         dev_priv->saveVGA1 = I915_READ(VGA1);
 690         dev_priv->saveVGA_PD = I915_READ(VGA_PD);
 691         if (HAS_PCH_SPLIT(dev))
 692                 dev_priv->saveVGACNTRL = I915_READ(CPU_VGACNTRL);
 693         else
 694                 dev_priv->saveVGACNTRL = I915_READ(VGACNTRL);
 695
 696         i915_save_vga(dev);
 697 }
 698
 699 static void i915_restore_display(struct drm_device *dev)
 700 {
 701         struct drm_i915_private *dev_priv = dev->dev_private;
 702
 703         /* Display arbitration */
 704         I915_WRITE(DSPARB, dev_priv->saveDSPARB);
 705
 706         /* Display port ratios (must be done before clock is set) */
 707         if (SUPPORTS_INTEGRATED_DP(dev)) {
 708                 I915_WRITE(_PIPEA_GMCH_DATA_M, dev_priv->savePIPEA_GMCH_DATA_M);
 709                 I915_WRITE(_PIPEB_GMCH_DATA_M, dev_priv->savePIPEB_GMCH_DATA_M);
 710                 I915_WRITE(_PIPEA_GMCH_DATA_N, dev_priv->savePIPEA_GMCH_DATA_N);
 711                 I915_WRITE(_PIPEB_GMCH_DATA_N, dev_priv->savePIPEB_GMCH_DATA_N);
 712                 I915_WRITE(_PIPEA_DP_LINK_M, dev_priv->savePIPEA_DP_LINK_M);
 713                 I915_WRITE(_PIPEB_DP_LINK_M, dev_priv->savePIPEB_DP_LINK_M);
 714                 I915_WRITE(_PIPEA_DP_LINK_N, dev_priv->savePIPEA_DP_LINK_N);
 715                 I915_WRITE(_PIPEB_DP_LINK_N, dev_priv->savePIPEB_DP_LINK_N);
 716         }
 717
 718         /* This is only meaningful in non-KMS mode */
 719         /* Don't restore them in KMS mode */
 720         i915_restore_modeset_reg(dev);
 721
 722         /* CRT state */
 723         if (HAS_PCH_SPLIT(dev))
 724                 I915_WRITE(PCH_ADPA, dev_priv->saveADPA);
 725         else
 726                 I915_WRITE(ADPA, dev_priv->saveADPA);
 727
 728         /* LVDS state */
 729         if (INTEL_INFO(dev)->gen >= 4 && !HAS_PCH_SPLIT(dev))
 730                 I915_WRITE(BLC_PWM_CTL2, dev_priv->saveBLC_PWM_CTL2);
 731
 732         if (HAS_PCH_SPLIT(dev)) {
 733                 I915_WRITE(PCH_LVDS, dev_priv->saveLVDS);
 734         } else if (IS_MOBILE(dev) && !IS_I830(dev))
 735                 I915_WRITE(LVDS, dev_priv->saveLVDS);
 736
 737         if (!IS_I830(dev) && !IS_845G(dev) && !HAS_PCH_SPLIT(dev))
 738                 I915_WRITE(PFIT_CONTROL, dev_priv->savePFIT_CONTROL);
 739
 740         if (HAS_PCH_SPLIT(dev)) {
 741                 I915_WRITE(BLC_PWM_PCH_CTL1, dev_priv->saveBLC_PWM_CTL);
 742                 I915_WRITE(BLC_PWM_PCH_CTL2, dev_priv->saveBLC_PWM_CTL2);
 743                 I915_WRITE(BLC_PWM_CPU_CTL, dev_priv->saveBLC_CPU_PWM_CTL);
 744                 I915_WRITE(BLC_PWM_CPU_CTL2, dev_priv->saveBLC_CPU_PWM_CTL2);
 745                 I915_WRITE(PCH_PP_ON_DELAYS, dev_priv->savePP_ON_DELAYS);
 746                 I915_WRITE(PCH_PP_OFF_DELAYS, dev_priv->savePP_OFF_DELAYS);
 747                 I915_WRITE(PCH_PP_DIVISOR, dev_priv->savePP_DIVISOR);
 748                 I915_WRITE(PCH_PP_CONTROL, dev_priv->savePP_CONTROL);
 749                 I915_WRITE(RSTDBYCTL,
 750                            dev_priv->saveMCHBAR_RENDER_STANDBY);
 751         } else {
 752                 I915_WRITE(PFIT_PGM_RATIOS, dev_priv->savePFIT_PGM_RATIOS);
 753                 I915_WRITE(BLC_PWM_CTL, dev_priv->saveBLC_PWM_CTL);
 754                 I915_WRITE(BLC_HIST_CTL, dev_priv->saveBLC_HIST_CTL);
 755                 I915_WRITE(PP_ON_DELAYS, dev_priv->savePP_ON_DELAYS);
 756                 I915_WRITE(PP_OFF_DELAYS, dev_priv->savePP_OFF_DELAYS);
 757                 I915_WRITE(PP_DIVISOR, dev_priv->savePP_DIVISOR);
 758                 I915_WRITE(PP_CONTROL, dev_priv->savePP_CONTROL);
 759         }
 760
 761         /* Display Port state */
 762         if (SUPPORTS_INTEGRATED_DP(dev)) {
 763                 I915_WRITE(DP_B, dev_priv->saveDP_B);
 764                 I915_WRITE(DP_C, dev_priv->saveDP_C);
 765                 I915_WRITE(DP_D, dev_priv->saveDP_D);
 766         }
 767         /* FIXME: restore TV & SDVO state */
 768
 769         /* only restore FBC info on the platform that supports FBC*/
 770         intel_disable_fbc(dev);
 771         if (I915_HAS_FBC(dev)) {
 772                 if (HAS_PCH_SPLIT(dev)) {
 773                         I915_WRITE(ILK_DPFC_CB_BASE, dev_priv->saveDPFC_CB_BASE);
 774                 } else if (IS_GM45(dev)) {
 775                         I915_WRITE(DPFC_CB_BASE, dev_priv->saveDPFC_CB_BASE);
 776                 } else {
 777                         I915_WRITE(FBC_CFB_BASE, dev_priv->saveFBC_CFB_BASE);
 778                         I915_WRITE(FBC_LL_BASE, dev_priv->saveFBC_LL_BASE);
 779                         I915_WRITE(FBC_CONTROL2, dev_priv->saveFBC_CONTROL2);
 780                         I915_WRITE(FBC_CONTROL, dev_priv->saveFBC_CONTROL);
 781                 }
 782         }
 783         /* VGA state */
 784         if (HAS_PCH_SPLIT(dev))
 785                 I915_WRITE(CPU_VGACNTRL, dev_priv->saveVGACNTRL);
 786         else
 787                 I915_WRITE(VGACNTRL, dev_priv->saveVGACNTRL);
 788
 789         I915_WRITE(VGA0, dev_priv->saveVGA0);
 790         I915_WRITE(VGA1, dev_priv->saveVGA1);
 791         I915_WRITE(VGA_PD, dev_priv->saveVGA_PD);
 792         POSTING_READ(VGA_PD);
 793         DRM_UDELAY(150);
 794
 795         i915_restore_vga(dev);
 796 }
 797
 798 int i915_save_state(struct drm_device *dev)
 799 {
 800         struct drm_i915_private *dev_priv = dev->dev_private;
 801         int i;
 802
 803         dev_priv->saveLBB = pci_read_config(dev->device, LBB, 1);
 804
 805         /* Hardware status page */
 806         dev_priv->saveHWS = I915_READ(HWS_PGA);
 807
 808         i915_save_display(dev);
 809
 810         /* Interrupt state */
 811         if (HAS_PCH_SPLIT(dev)) {
 812                 dev_priv->saveDEIER = I915_READ(DEIER);
 813                 dev_priv->saveDEIMR = I915_READ(DEIMR);
 814                 dev_priv->saveGTIER = I915_READ(GTIER);
 815                 dev_priv->saveGTIMR = I915_READ(GTIMR);
 816                 dev_priv->saveFDI_RXA_IMR = I915_READ(_FDI_RXA_IMR);
 817                 dev_priv->saveFDI_RXB_IMR = I915_READ(_FDI_RXB_IMR);
 818                 dev_priv->saveMCHBAR_RENDER_STANDBY =
 819                         I915_READ(RSTDBYCTL);
 820                 dev_priv->savePCH_PORT_HOTPLUG = I915_READ(PCH_PORT_HOTPLUG);
 821         } else {
 822                 dev_priv->saveIER = I915_READ(IER);
 823                 dev_priv->saveIMR = I915_READ(IMR);
 824         }
 825
 826         if (IS_IRONLAKE_M(dev))
 827                 ironlake_disable_drps(dev);
 828         if (INTEL_INFO(dev)->gen >= 6)
 829                 gen6_disable_rps(dev);
 830
 831         /* Cache mode state */
 832         dev_priv->saveCACHE_MODE_0 = I915_READ(CACHE_MODE_0);
 833
 834         /* Memory Arbitration state */
 835         dev_priv->saveMI_ARB_STATE = I915_READ(MI_ARB_STATE);
 836
 837         /* Scratch space */
 838         for (i = 0; i < 16; i++) {
 839                 dev_priv->saveSWF0[i] = I915_READ(SWF00 + (i << 2));
 840                 dev_priv->saveSWF1[i] = I915_READ(SWF10 + (i << 2));
 841         }
 842         for (i = 0; i < 3; i++)
 843                 dev_priv->saveSWF2[i] = I915_READ(SWF30 + (i << 2));
 844
 845         return 0;
 846 }
 847
 848 int i915_restore_state(struct drm_device *dev)
 849 {
 850         struct drm_i915_private *dev_priv = dev->dev_private;
 851         int i;
 852
 853         pci_write_config(dev->device, LBB, dev_priv->saveLBB, 1);
 854
 855
 856         /* Hardware status page */
 857         I915_WRITE(HWS_PGA, dev_priv->saveHWS);
 858
 859         i915_restore_display(dev);
 860
 861         /* Interrupt state */
 862         if (HAS_PCH_SPLIT(dev)) {
 863                 I915_WRITE(DEIER, dev_priv->saveDEIER);
 864                 I915_WRITE(DEIMR, dev_priv->saveDEIMR);
 865                 I915_WRITE(GTIER, dev_priv->saveGTIER);
 866                 I915_WRITE(GTIMR, dev_priv->saveGTIMR);
 867                 I915_WRITE(_FDI_RXA_IMR, dev_priv->saveFDI_RXA_IMR);
 868                 I915_WRITE(_FDI_RXB_IMR, dev_priv->saveFDI_RXB_IMR);
 869                 I915_WRITE(PCH_PORT_HOTPLUG, dev_priv->savePCH_PORT_HOTPLUG);
 870         } else {
 871                 I915_WRITE(IER, dev_priv->saveIER);
 872                 I915_WRITE(IMR, dev_priv->saveIMR);
 873         }
 874         DRM_UNLOCK(dev);
 875
 876         if (drm_core_check_feature(dev, DRIVER_MODESET))
 877                 intel_init_clock_gating(dev);
 878
 879         if (IS_IRONLAKE_M(dev)) {
 880                 ironlake_enable_drps(dev);
 881                 intel_init_emon(dev);
 882         }
 883
 884         if (INTEL_INFO(dev)->gen >= 6) {
 885                 gen6_enable_rps(dev_priv);
 886                 gen6_update_ring_freq(dev_priv);
 887         }
 888
 889         DRM_LOCK(dev);
 890
 891         /* Cache mode state */
 892         I915_WRITE(CACHE_MODE_0, dev_priv->saveCACHE_MODE_0 | 0xffff0000);
 893
 894         /* Memory arbitration state */
 895         I915_WRITE(MI_ARB_STATE, dev_priv->saveMI_ARB_STATE | 0xffff0000);
 896
 897         for (i = 0; i < 16; i++) {
 898                 I915_WRITE(SWF00 + (i << 2), dev_priv->saveSWF0[i]);
 899                 I915_WRITE(SWF10 + (i << 2), dev_priv->saveSWF1[i]);
 900         }
 901         for (i = 0; i < 3; i++)
 902                 I915_WRITE(SWF30 + (i << 2), dev_priv->saveSWF2[i]);
 903
 904         intel_iic_reset(dev);
 905
 906         return 0;
 907 }