drivers/gpu/drm/i915/i915_ums.c

   1 /*
   2  *
   3  * Copyright 2008 (c) Intel Corporation
   4  *   Jesse Barnes <jbarnes@virtuousgeek.org>
   5  * Copyright 2013 (c) Intel Corporation
   6  *   Daniel Vetter <daniel.vetter@ffwll.ch>
   7  *
   8  * Permission is hereby granted, free of charge, to any person obtaining a
   9  * copy of this software and associated documentation files (the
  10  * "Software"), to deal in the Software without restriction, including
  11  * without limitation the rights to use, copy, modify, merge, publish,
  12  * distribute, sub license, and/or sell copies of the Software, and to
  13  * permit persons to whom the Software is furnished to do so, subject to
  14  * the following conditions:
  15  *
  16  * The above copyright notice and this permission notice (including the
  17  * next paragraph) shall be included in all copies or substantial portions
  18  * of the Software.
  19  *
  20  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  21  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
  23  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
  24  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
  25  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
  26  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
  27  */
  28
  29 #include <drm/drmP.h>
  30 #include <drm/i915_drm.h>
  31 #include "intel_drv.h"
  32 #include "i915_reg.h"
  33
  34 static bool i915_pipe_enabled(struct drm_device *dev, enum pipe pipe)
  35 {
  36         struct drm_i915_private *dev_priv = dev->dev_private;
  37         u32     dpll_reg;
  38
  39         /* On IVB, 3rd pipe shares PLL with another one */
  40         if (pipe > 1)
  41                 return false;
  42
  43         if (HAS_PCH_SPLIT(dev))
  44                 dpll_reg = PCH_DPLL(pipe);
  45         else
  46                 dpll_reg = (pipe == PIPE_A) ? _DPLL_A : _DPLL_B;
  47
  48         return (I915_READ(dpll_reg) & DPLL_VCO_ENABLE);
  49 }
  50
  51 static void i915_save_palette(struct drm_device *dev, enum pipe pipe)
  52 {
  53         struct drm_i915_private *dev_priv = dev->dev_private;
  54         unsigned long reg = (pipe == PIPE_A ? _PALETTE_A : _PALETTE_B);
  55         u32 *array;
  56         int i;
  57
  58         if (!i915_pipe_enabled(dev, pipe))
  59                 return;
  60
  61         if (HAS_PCH_SPLIT(dev))
  62                 reg = (pipe == PIPE_A) ? _LGC_PALETTE_A : _LGC_PALETTE_B;
  63
  64         if (pipe == PIPE_A)
  65                 array = dev_priv->regfile.save_palette_a;
  66         else
  67                 array = dev_priv->regfile.save_palette_b;
  68
  69         for (i = 0; i < 256; i++)
  70                 array[i] = I915_READ(reg + (i << 2));
  71 }
  72
  73 static void i915_restore_palette(struct drm_device *dev, enum pipe pipe)
  74 {
  75         struct drm_i915_private *dev_priv = dev->dev_private;
  76         unsigned long reg = (pipe == PIPE_A ? _PALETTE_A : _PALETTE_B);
  77         u32 *array;
  78         int i;
  79
  80         if (!i915_pipe_enabled(dev, pipe))
  81                 return;
  82
  83         if (HAS_PCH_SPLIT(dev))
  84                 reg = (pipe == PIPE_A) ? _LGC_PALETTE_A : _LGC_PALETTE_B;
  85
  86         if (pipe == PIPE_A)
  87                 array = dev_priv->regfile.save_palette_a;
  88         else
  89                 array = dev_priv->regfile.save_palette_b;
  90
  91         for (i = 0; i < 256; i++)
  92                 I915_WRITE(reg + (i << 2), array[i]);
  93 }
  94
  95 void i915_save_display_reg(struct drm_device *dev)
  96 {
  97         struct drm_i915_private *dev_priv = dev->dev_private;
  98         int i;
  99
 100         /* Cursor state */
 101         dev_priv->regfile.saveCURACNTR = I915_READ(_CURACNTR);
 102         dev_priv->regfile.saveCURAPOS = I915_READ(_CURAPOS);
 103         dev_priv->regfile.saveCURABASE = I915_READ(_CURABASE);
 104         dev_priv->regfile.saveCURBCNTR = I915_READ(_CURBCNTR);
 105         dev_priv->regfile.saveCURBPOS = I915_READ(_CURBPOS);
 106         dev_priv->regfile.saveCURBBASE = I915_READ(_CURBBASE);
 107         if (IS_GEN2(dev))
 108                 dev_priv->regfile.saveCURSIZE = I915_READ(CURSIZE);
 109
 110         if (HAS_PCH_SPLIT(dev)) {
 111                 dev_priv->regfile.savePCH_DREF_CONTROL = I915_READ(PCH_DREF_CONTROL);
 112                 dev_priv->regfile.saveDISP_ARB_CTL = I915_READ(DISP_ARB_CTL);
 113         }
 114
 115         /* Pipe & plane A info */
 116         dev_priv->regfile.savePIPEACONF = I915_READ(_PIPEACONF);
 117         dev_priv->regfile.savePIPEASRC = I915_READ(_PIPEASRC);
 118         if (HAS_PCH_SPLIT(dev)) {
 119                 dev_priv->regfile.saveFPA0 = I915_READ(_PCH_FPA0);
 120                 dev_priv->regfile.saveFPA1 = I915_READ(_PCH_FPA1);
 121                 dev_priv->regfile.saveDPLL_A = I915_READ(_PCH_DPLL_A);
 122         } else {
 123                 dev_priv->regfile.saveFPA0 = I915_READ(_FPA0);
 124                 dev_priv->regfile.saveFPA1 = I915_READ(_FPA1);
 125                 dev_priv->regfile.saveDPLL_A = I915_READ(_DPLL_A);
 126         }
 127         if (INTEL_INFO(dev)->gen >= 4 && !HAS_PCH_SPLIT(dev))
 128                 dev_priv->regfile.saveDPLL_A_MD = I915_READ(_DPLL_A_MD);
 129         dev_priv->regfile.saveHTOTAL_A = I915_READ(_HTOTAL_A);
 130         dev_priv->regfile.saveHBLANK_A = I915_READ(_HBLANK_A);
 131         dev_priv->regfile.saveHSYNC_A = I915_READ(_HSYNC_A);
 132         dev_priv->regfile.saveVTOTAL_A = I915_READ(_VTOTAL_A);
 133         dev_priv->regfile.saveVBLANK_A = I915_READ(_VBLANK_A);
 134         dev_priv->regfile.saveVSYNC_A = I915_READ(_VSYNC_A);
 135         if (!HAS_PCH_SPLIT(dev))
 136                 dev_priv->regfile.saveBCLRPAT_A = I915_READ(_BCLRPAT_A);
 137
 138         if (HAS_PCH_SPLIT(dev)) {
 139                 dev_priv->regfile.savePIPEA_DATA_M1 = I915_READ(_PIPEA_DATA_M1);
 140                 dev_priv->regfile.savePIPEA_DATA_N1 = I915_READ(_PIPEA_DATA_N1);
 141                 dev_priv->regfile.savePIPEA_LINK_M1 = I915_READ(_PIPEA_LINK_M1);
 142                 dev_priv->regfile.savePIPEA_LINK_N1 = I915_READ(_PIPEA_LINK_N1);
 143
 144                 dev_priv->regfile.saveFDI_TXA_CTL = I915_READ(_FDI_TXA_CTL);
 145                 dev_priv->regfile.saveFDI_RXA_CTL = I915_READ(_FDI_RXA_CTL);
 146
 147                 dev_priv->regfile.savePFA_CTL_1 = I915_READ(_PFA_CTL_1);
 148                 dev_priv->regfile.savePFA_WIN_SZ = I915_READ(_PFA_WIN_SZ);
 149                 dev_priv->regfile.savePFA_WIN_POS = I915_READ(_PFA_WIN_POS);
 150
 151                 dev_priv->regfile.saveTRANSACONF = I915_READ(_PCH_TRANSACONF);
 152                 dev_priv->regfile.saveTRANS_HTOTAL_A = I915_READ(_PCH_TRANS_HTOTAL_A);
 153                 dev_priv->regfile.saveTRANS_HBLANK_A = I915_READ(_PCH_TRANS_HBLANK_A);
 154                 dev_priv->regfile.saveTRANS_HSYNC_A = I915_READ(_PCH_TRANS_HSYNC_A);
 155                 dev_priv->regfile.saveTRANS_VTOTAL_A = I915_READ(_PCH_TRANS_VTOTAL_A);
 156                 dev_priv->regfile.saveTRANS_VBLANK_A = I915_READ(_PCH_TRANS_VBLANK_A);
 157                 dev_priv->regfile.saveTRANS_VSYNC_A = I915_READ(_PCH_TRANS_VSYNC_A);
 158         }
 159
 160         dev_priv->regfile.saveDSPACNTR = I915_READ(_DSPACNTR);
 161         dev_priv->regfile.saveDSPASTRIDE = I915_READ(_DSPASTRIDE);
 162         dev_priv->regfile.saveDSPASIZE = I915_READ(_DSPASIZE);
 163         dev_priv->regfile.saveDSPAPOS = I915_READ(_DSPAPOS);
 164         dev_priv->regfile.saveDSPAADDR = I915_READ(_DSPAADDR);
 165         if (INTEL_INFO(dev)->gen >= 4) {
 166                 dev_priv->regfile.saveDSPASURF = I915_READ(_DSPASURF);
 167                 dev_priv->regfile.saveDSPATILEOFF = I915_READ(_DSPATILEOFF);
 168         }
 169         i915_save_palette(dev, PIPE_A);
 170         dev_priv->regfile.savePIPEASTAT = I915_READ(_PIPEASTAT);
 171
 172         /* Pipe & plane B info */
 173         dev_priv->regfile.savePIPEBCONF = I915_READ(_PIPEBCONF);
 174         dev_priv->regfile.savePIPEBSRC = I915_READ(_PIPEBSRC);
 175         if (HAS_PCH_SPLIT(dev)) {
 176                 dev_priv->regfile.saveFPB0 = I915_READ(_PCH_FPB0);
 177                 dev_priv->regfile.saveFPB1 = I915_READ(_PCH_FPB1);
 178                 dev_priv->regfile.saveDPLL_B = I915_READ(_PCH_DPLL_B);
 179         } else {
 180                 dev_priv->regfile.saveFPB0 = I915_READ(_FPB0);
 181                 dev_priv->regfile.saveFPB1 = I915_READ(_FPB1);
 182                 dev_priv->regfile.saveDPLL_B = I915_READ(_DPLL_B);
 183         }
 184         if (INTEL_INFO(dev)->gen >= 4 && !HAS_PCH_SPLIT(dev))
 185                 dev_priv->regfile.saveDPLL_B_MD = I915_READ(_DPLL_B_MD);
 186         dev_priv->regfile.saveHTOTAL_B = I915_READ(_HTOTAL_B);
 187         dev_priv->regfile.saveHBLANK_B = I915_READ(_HBLANK_B);
 188         dev_priv->regfile.saveHSYNC_B = I915_READ(_HSYNC_B);
 189         dev_priv->regfile.saveVTOTAL_B = I915_READ(_VTOTAL_B);
 190         dev_priv->regfile.saveVBLANK_B = I915_READ(_VBLANK_B);
 191         dev_priv->regfile.saveVSYNC_B = I915_READ(_VSYNC_B);
 192         if (!HAS_PCH_SPLIT(dev))
 193                 dev_priv->regfile.saveBCLRPAT_B = I915_READ(_BCLRPAT_B);
 194
 195         if (HAS_PCH_SPLIT(dev)) {
 196                 dev_priv->regfile.savePIPEB_DATA_M1 = I915_READ(_PIPEB_DATA_M1);
 197                 dev_priv->regfile.savePIPEB_DATA_N1 = I915_READ(_PIPEB_DATA_N1);
 198                 dev_priv->regfile.savePIPEB_LINK_M1 = I915_READ(_PIPEB_LINK_M1);
 199                 dev_priv->regfile.savePIPEB_LINK_N1 = I915_READ(_PIPEB_LINK_N1);
 200
 201                 dev_priv->regfile.saveFDI_TXB_CTL = I915_READ(_FDI_TXB_CTL);
 202                 dev_priv->regfile.saveFDI_RXB_CTL = I915_READ(_FDI_RXB_CTL);
 203
 204                 dev_priv->regfile.savePFB_CTL_1 = I915_READ(_PFB_CTL_1);
 205                 dev_priv->regfile.savePFB_WIN_SZ = I915_READ(_PFB_WIN_SZ);
 206                 dev_priv->regfile.savePFB_WIN_POS = I915_READ(_PFB_WIN_POS);
 207
 208                 dev_priv->regfile.saveTRANSBCONF = I915_READ(_PCH_TRANSBCONF);
 209                 dev_priv->regfile.saveTRANS_HTOTAL_B = I915_READ(_PCH_TRANS_HTOTAL_B);
 210                 dev_priv->regfile.saveTRANS_HBLANK_B = I915_READ(_PCH_TRANS_HBLANK_B);
 211                 dev_priv->regfile.saveTRANS_HSYNC_B = I915_READ(_PCH_TRANS_HSYNC_B);
 212                 dev_priv->regfile.saveTRANS_VTOTAL_B = I915_READ(_PCH_TRANS_VTOTAL_B);
 213                 dev_priv->regfile.saveTRANS_VBLANK_B = I915_READ(_PCH_TRANS_VBLANK_B);
 214                 dev_priv->regfile.saveTRANS_VSYNC_B = I915_READ(_PCH_TRANS_VSYNC_B);
 215         }
 216
 217         dev_priv->regfile.saveDSPBCNTR = I915_READ(_DSPBCNTR);
 218         dev_priv->regfile.saveDSPBSTRIDE = I915_READ(_DSPBSTRIDE);
 219         dev_priv->regfile.saveDSPBSIZE = I915_READ(_DSPBSIZE);
 220         dev_priv->regfile.saveDSPBPOS = I915_READ(_DSPBPOS);
 221         dev_priv->regfile.saveDSPBADDR = I915_READ(_DSPBADDR);
 222         if (INTEL_INFO(dev)->gen >= 4) {
 223                 dev_priv->regfile.saveDSPBSURF = I915_READ(_DSPBSURF);
 224                 dev_priv->regfile.saveDSPBTILEOFF = I915_READ(_DSPBTILEOFF);
 225         }
 226         i915_save_palette(dev, PIPE_B);
 227         dev_priv->regfile.savePIPEBSTAT = I915_READ(_PIPEBSTAT);
 228
 229         /* Fences */
 230         switch (INTEL_INFO(dev)->gen) {
 231         case 7:
 232         case 6:
 233                 for (i = 0; i < 16; i++)
 234                         dev_priv->regfile.saveFENCE[i] = I915_READ64(FENCE_REG_SANDYBRIDGE_0 + (i * 8));
 235                 break;
 236         case 5:
 237         case 4:
 238                 for (i = 0; i < 16; i++)
 239                         dev_priv->regfile.saveFENCE[i] = I915_READ64(FENCE_REG_965_0 + (i * 8));
 240                 break;
 241         case 3:
 242                 if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))
 243                         for (i = 0; i < 8; i++)
 244                                 dev_priv->regfile.saveFENCE[i+8] = I915_READ(FENCE_REG_945_8 + (i * 4));
 245         case 2:
 246                 for (i = 0; i < 8; i++)
 247                         dev_priv->regfile.saveFENCE[i] = I915_READ(FENCE_REG_830_0 + (i * 4));
 248                 break;
 249         }
 250
 251         /* CRT state */
 252         if (HAS_PCH_SPLIT(dev))
 253                 dev_priv->regfile.saveADPA = I915_READ(PCH_ADPA);
 254         else
 255                 dev_priv->regfile.saveADPA = I915_READ(ADPA);
 256
 257         /* Display Port state */
 258         if (SUPPORTS_INTEGRATED_DP(dev)) {
 259                 dev_priv->regfile.saveDP_B = I915_READ(DP_B);
 260                 dev_priv->regfile.saveDP_C = I915_READ(DP_C);
 261                 dev_priv->regfile.saveDP_D = I915_READ(DP_D);
 262                 dev_priv->regfile.savePIPEA_GMCH_DATA_M = I915_READ(_PIPEA_DATA_M_G4X);
 263                 dev_priv->regfile.savePIPEB_GMCH_DATA_M = I915_READ(_PIPEB_DATA_M_G4X);
 264                 dev_priv->regfile.savePIPEA_GMCH_DATA_N = I915_READ(_PIPEA_DATA_N_G4X);
 265                 dev_priv->regfile.savePIPEB_GMCH_DATA_N = I915_READ(_PIPEB_DATA_N_G4X);
 266                 dev_priv->regfile.savePIPEA_DP_LINK_M = I915_READ(_PIPEA_LINK_M_G4X);
 267                 dev_priv->regfile.savePIPEB_DP_LINK_M = I915_READ(_PIPEB_LINK_M_G4X);
 268                 dev_priv->regfile.savePIPEA_DP_LINK_N = I915_READ(_PIPEA_LINK_N_G4X);
 269                 dev_priv->regfile.savePIPEB_DP_LINK_N = I915_READ(_PIPEB_LINK_N_G4X);
 270         }
 271         /* FIXME: regfile.save TV & SDVO state */
 272
 273         /* Backlight */
 274         if (HAS_PCH_SPLIT(dev)) {
 275                 dev_priv->regfile.saveBLC_PWM_CTL = I915_READ(BLC_PWM_PCH_CTL1);
 276                 dev_priv->regfile.saveBLC_PWM_CTL2 = I915_READ(BLC_PWM_PCH_CTL2);
 277                 dev_priv->regfile.saveBLC_CPU_PWM_CTL = I915_READ(BLC_PWM_CPU_CTL);
 278                 dev_priv->regfile.saveBLC_CPU_PWM_CTL2 = I915_READ(BLC_PWM_CPU_CTL2);
 279         } else {
 280                 dev_priv->regfile.saveBLC_PWM_CTL = I915_READ(BLC_PWM_CTL);
 281                 if (INTEL_INFO(dev)->gen >= 4)
 282                         dev_priv->regfile.saveBLC_PWM_CTL2 = I915_READ(BLC_PWM_CTL2);
 283         }
 284
 285         return;
 286 }
 287
 288 void i915_restore_display_reg(struct drm_device *dev)
 289 {
 290         struct drm_i915_private *dev_priv = dev->dev_private;
 291         int dpll_a_reg, fpa0_reg, fpa1_reg;
 292         int dpll_b_reg, fpb0_reg, fpb1_reg;
 293         int i;
 294
 295         /* Backlight */
 296         if (HAS_PCH_SPLIT(dev)) {
 297                 I915_WRITE(BLC_PWM_PCH_CTL1, dev_priv->regfile.saveBLC_PWM_CTL);
 298                 I915_WRITE(BLC_PWM_PCH_CTL2, dev_priv->regfile.saveBLC_PWM_CTL2);
 299                 /* NOTE: BLC_PWM_CPU_CTL must be written after BLC_PWM_CPU_CTL2;
 300                  * otherwise we get blank eDP screen after S3 on some machines
 301                  */
 302                 I915_WRITE(BLC_PWM_CPU_CTL2, dev_priv->regfile.saveBLC_CPU_PWM_CTL2);
 303                 I915_WRITE(BLC_PWM_CPU_CTL, dev_priv->regfile.saveBLC_CPU_PWM_CTL);
 304         } else {
 305                 if (INTEL_INFO(dev)->gen >= 4)
 306                         I915_WRITE(BLC_PWM_CTL2, dev_priv->regfile.saveBLC_PWM_CTL2);
 307                 I915_WRITE(BLC_PWM_CTL, dev_priv->regfile.saveBLC_PWM_CTL);
 308         }
 309
 310         /* Display port ratios (must be done before clock is set) */
 311         if (SUPPORTS_INTEGRATED_DP(dev)) {
 312                 I915_WRITE(_PIPEA_DATA_M_G4X, dev_priv->regfile.savePIPEA_GMCH_DATA_M);
 313                 I915_WRITE(_PIPEB_DATA_M_G4X, dev_priv->regfile.savePIPEB_GMCH_DATA_M);
 314                 I915_WRITE(_PIPEA_DATA_N_G4X, dev_priv->regfile.savePIPEA_GMCH_DATA_N);
 315                 I915_WRITE(_PIPEB_DATA_N_G4X, dev_priv->regfile.savePIPEB_GMCH_DATA_N);
 316                 I915_WRITE(_PIPEA_LINK_M_G4X, dev_priv->regfile.savePIPEA_DP_LINK_M);
 317                 I915_WRITE(_PIPEB_LINK_M_G4X, dev_priv->regfile.savePIPEB_DP_LINK_M);
 318                 I915_WRITE(_PIPEA_LINK_N_G4X, dev_priv->regfile.savePIPEA_DP_LINK_N);
 319                 I915_WRITE(_PIPEB_LINK_N_G4X, dev_priv->regfile.savePIPEB_DP_LINK_N);
 320         }
 321
 322         /* Fences */
 323         switch (INTEL_INFO(dev)->gen) {
 324         case 7:
 325         case 6:
 326                 for (i = 0; i < 16; i++)
 327                         I915_WRITE64(FENCE_REG_SANDYBRIDGE_0 + (i * 8), dev_priv->regfile.saveFENCE[i]);
 328                 break;
 329         case 5:
 330         case 4:
 331                 for (i = 0; i < 16; i++)
 332                         I915_WRITE64(FENCE_REG_965_0 + (i * 8), dev_priv->regfile.saveFENCE[i]);
 333                 break;
 334         case 3:
 335         case 2:
 336                 if (IS_I945G(dev) || IS_I945GM(dev) || IS_G33(dev))
 337                         for (i = 0; i < 8; i++)
 338                                 I915_WRITE(FENCE_REG_945_8 + (i * 4), dev_priv->regfile.saveFENCE[i+8]);
 339                 for (i = 0; i < 8; i++)
 340                         I915_WRITE(FENCE_REG_830_0 + (i * 4), dev_priv->regfile.saveFENCE[i]);
 341                 break;
 342         }
 343
 344
 345         if (HAS_PCH_SPLIT(dev)) {
 346                 dpll_a_reg = _PCH_DPLL_A;
 347                 dpll_b_reg = _PCH_DPLL_B;
 348                 fpa0_reg = _PCH_FPA0;
 349                 fpb0_reg = _PCH_FPB0;
 350                 fpa1_reg = _PCH_FPA1;
 351                 fpb1_reg = _PCH_FPB1;
 352         } else {
 353                 dpll_a_reg = _DPLL_A;
 354                 dpll_b_reg = _DPLL_B;
 355                 fpa0_reg = _FPA0;
 356                 fpb0_reg = _FPB0;
 357                 fpa1_reg = _FPA1;
 358                 fpb1_reg = _FPB1;
 359         }
 360
 361         if (HAS_PCH_SPLIT(dev)) {
 362                 I915_WRITE(PCH_DREF_CONTROL, dev_priv->regfile.savePCH_DREF_CONTROL);
 363                 I915_WRITE(DISP_ARB_CTL, dev_priv->regfile.saveDISP_ARB_CTL);
 364         }
 365
 366         /* Pipe & plane A info */
 367         /* Prime the clock */
 368         if (dev_priv->regfile.saveDPLL_A & DPLL_VCO_ENABLE) {
 369                 I915_WRITE(dpll_a_reg, dev_priv->regfile.saveDPLL_A &
 370                            ~DPLL_VCO_ENABLE);
 371                 POSTING_READ(dpll_a_reg);
 372                 udelay(150);
 373         }
 374         I915_WRITE(fpa0_reg, dev_priv->regfile.saveFPA0);
 375         I915_WRITE(fpa1_reg, dev_priv->regfile.saveFPA1);
 376         /* Actually enable it */
 377         I915_WRITE(dpll_a_reg, dev_priv->regfile.saveDPLL_A);
 378         POSTING_READ(dpll_a_reg);
 379         udelay(150);
 380         if (INTEL_INFO(dev)->gen >= 4 && !HAS_PCH_SPLIT(dev)) {
 381                 I915_WRITE(_DPLL_A_MD, dev_priv->regfile.saveDPLL_A_MD);
 382                 POSTING_READ(_DPLL_A_MD);
 383         }
 384         udelay(150);
 385
 386         /* Restore mode */
 387         I915_WRITE(_HTOTAL_A, dev_priv->regfile.saveHTOTAL_A);
 388         I915_WRITE(_HBLANK_A, dev_priv->regfile.saveHBLANK_A);
 389         I915_WRITE(_HSYNC_A, dev_priv->regfile.saveHSYNC_A);
 390         I915_WRITE(_VTOTAL_A, dev_priv->regfile.saveVTOTAL_A);
 391         I915_WRITE(_VBLANK_A, dev_priv->regfile.saveVBLANK_A);
 392         I915_WRITE(_VSYNC_A, dev_priv->regfile.saveVSYNC_A);
 393         if (!HAS_PCH_SPLIT(dev))
 394                 I915_WRITE(_BCLRPAT_A, dev_priv->regfile.saveBCLRPAT_A);
 395
 396         if (HAS_PCH_SPLIT(dev)) {
 397                 I915_WRITE(_PIPEA_DATA_M1, dev_priv->regfile.savePIPEA_DATA_M1);
 398                 I915_WRITE(_PIPEA_DATA_N1, dev_priv->regfile.savePIPEA_DATA_N1);
 399                 I915_WRITE(_PIPEA_LINK_M1, dev_priv->regfile.savePIPEA_LINK_M1);
 400                 I915_WRITE(_PIPEA_LINK_N1, dev_priv->regfile.savePIPEA_LINK_N1);
 401
 402                 I915_WRITE(_FDI_RXA_CTL, dev_priv->regfile.saveFDI_RXA_CTL);
 403                 I915_WRITE(_FDI_TXA_CTL, dev_priv->regfile.saveFDI_TXA_CTL);
 404
 405                 I915_WRITE(_PFA_CTL_1, dev_priv->regfile.savePFA_CTL_1);
 406                 I915_WRITE(_PFA_WIN_SZ, dev_priv->regfile.savePFA_WIN_SZ);
 407                 I915_WRITE(_PFA_WIN_POS, dev_priv->regfile.savePFA_WIN_POS);
 408
 409                 I915_WRITE(_PCH_TRANSACONF, dev_priv->regfile.saveTRANSACONF);
 410                 I915_WRITE(_PCH_TRANS_HTOTAL_A, dev_priv->regfile.saveTRANS_HTOTAL_A);
 411                 I915_WRITE(_PCH_TRANS_HBLANK_A, dev_priv->regfile.saveTRANS_HBLANK_A);
 412                 I915_WRITE(_PCH_TRANS_HSYNC_A, dev_priv->regfile.saveTRANS_HSYNC_A);
 413                 I915_WRITE(_PCH_TRANS_VTOTAL_A, dev_priv->regfile.saveTRANS_VTOTAL_A);
 414                 I915_WRITE(_PCH_TRANS_VBLANK_A, dev_priv->regfile.saveTRANS_VBLANK_A);
 415                 I915_WRITE(_PCH_TRANS_VSYNC_A, dev_priv->regfile.saveTRANS_VSYNC_A);
 416         }
 417
 418         /* Restore plane info */
 419         I915_WRITE(_DSPASIZE, dev_priv->regfile.saveDSPASIZE);
 420         I915_WRITE(_DSPAPOS, dev_priv->regfile.saveDSPAPOS);
 421         I915_WRITE(_PIPEASRC, dev_priv->regfile.savePIPEASRC);
 422         I915_WRITE(_DSPAADDR, dev_priv->regfile.saveDSPAADDR);
 423         I915_WRITE(_DSPASTRIDE, dev_priv->regfile.saveDSPASTRIDE);
 424         if (INTEL_INFO(dev)->gen >= 4) {
 425                 I915_WRITE(_DSPASURF, dev_priv->regfile.saveDSPASURF);
 426                 I915_WRITE(_DSPATILEOFF, dev_priv->regfile.saveDSPATILEOFF);
 427         }
 428
 429         I915_WRITE(_PIPEACONF, dev_priv->regfile.savePIPEACONF);
 430
 431         i915_restore_palette(dev, PIPE_A);
 432         /* Enable the plane */
 433         I915_WRITE(_DSPACNTR, dev_priv->regfile.saveDSPACNTR);
 434         I915_WRITE(_DSPAADDR, I915_READ(_DSPAADDR));
 435
 436         /* Pipe & plane B info */
 437         if (dev_priv->regfile.saveDPLL_B & DPLL_VCO_ENABLE) {
 438                 I915_WRITE(dpll_b_reg, dev_priv->regfile.saveDPLL_B &
 439                            ~DPLL_VCO_ENABLE);
 440                 POSTING_READ(dpll_b_reg);
 441                 udelay(150);
 442         }
 443         I915_WRITE(fpb0_reg, dev_priv->regfile.saveFPB0);
 444         I915_WRITE(fpb1_reg, dev_priv->regfile.saveFPB1);
 445         /* Actually enable it */
 446         I915_WRITE(dpll_b_reg, dev_priv->regfile.saveDPLL_B);
 447         POSTING_READ(dpll_b_reg);
 448         udelay(150);
 449         if (INTEL_INFO(dev)->gen >= 4 && !HAS_PCH_SPLIT(dev)) {
 450                 I915_WRITE(_DPLL_B_MD, dev_priv->regfile.saveDPLL_B_MD);
 451                 POSTING_READ(_DPLL_B_MD);
 452         }
 453         udelay(150);
 454
 455         /* Restore mode */
 456         I915_WRITE(_HTOTAL_B, dev_priv->regfile.saveHTOTAL_B);
 457         I915_WRITE(_HBLANK_B, dev_priv->regfile.saveHBLANK_B);
 458         I915_WRITE(_HSYNC_B, dev_priv->regfile.saveHSYNC_B);
 459         I915_WRITE(_VTOTAL_B, dev_priv->regfile.saveVTOTAL_B);
 460         I915_WRITE(_VBLANK_B, dev_priv->regfile.saveVBLANK_B);
 461         I915_WRITE(_VSYNC_B, dev_priv->regfile.saveVSYNC_B);
 462         if (!HAS_PCH_SPLIT(dev))
 463                 I915_WRITE(_BCLRPAT_B, dev_priv->regfile.saveBCLRPAT_B);
 464
 465         if (HAS_PCH_SPLIT(dev)) {
 466                 I915_WRITE(_PIPEB_DATA_M1, dev_priv->regfile.savePIPEB_DATA_M1);
 467                 I915_WRITE(_PIPEB_DATA_N1, dev_priv->regfile.savePIPEB_DATA_N1);
 468                 I915_WRITE(_PIPEB_LINK_M1, dev_priv->regfile.savePIPEB_LINK_M1);
 469                 I915_WRITE(_PIPEB_LINK_N1, dev_priv->regfile.savePIPEB_LINK_N1);
 470
 471                 I915_WRITE(_FDI_RXB_CTL, dev_priv->regfile.saveFDI_RXB_CTL);
 472                 I915_WRITE(_FDI_TXB_CTL, dev_priv->regfile.saveFDI_TXB_CTL);
 473
 474                 I915_WRITE(_PFB_CTL_1, dev_priv->regfile.savePFB_CTL_1);
 475                 I915_WRITE(_PFB_WIN_SZ, dev_priv->regfile.savePFB_WIN_SZ);
 476                 I915_WRITE(_PFB_WIN_POS, dev_priv->regfile.savePFB_WIN_POS);
 477
 478                 I915_WRITE(_PCH_TRANSBCONF, dev_priv->regfile.saveTRANSBCONF);
 479                 I915_WRITE(_PCH_TRANS_HTOTAL_B, dev_priv->regfile.saveTRANS_HTOTAL_B);
 480                 I915_WRITE(_PCH_TRANS_HBLANK_B, dev_priv->regfile.saveTRANS_HBLANK_B);
 481                 I915_WRITE(_PCH_TRANS_HSYNC_B, dev_priv->regfile.saveTRANS_HSYNC_B);
 482                 I915_WRITE(_PCH_TRANS_VTOTAL_B, dev_priv->regfile.saveTRANS_VTOTAL_B);
 483                 I915_WRITE(_PCH_TRANS_VBLANK_B, dev_priv->regfile.saveTRANS_VBLANK_B);
 484                 I915_WRITE(_PCH_TRANS_VSYNC_B, dev_priv->regfile.saveTRANS_VSYNC_B);
 485         }
 486
 487         /* Restore plane info */
 488         I915_WRITE(_DSPBSIZE, dev_priv->regfile.saveDSPBSIZE);
 489         I915_WRITE(_DSPBPOS, dev_priv->regfile.saveDSPBPOS);
 490         I915_WRITE(_PIPEBSRC, dev_priv->regfile.savePIPEBSRC);
 491         I915_WRITE(_DSPBADDR, dev_priv->regfile.saveDSPBADDR);
 492         I915_WRITE(_DSPBSTRIDE, dev_priv->regfile.saveDSPBSTRIDE);
 493         if (INTEL_INFO(dev)->gen >= 4) {
 494                 I915_WRITE(_DSPBSURF, dev_priv->regfile.saveDSPBSURF);
 495                 I915_WRITE(_DSPBTILEOFF, dev_priv->regfile.saveDSPBTILEOFF);
 496         }
 497
 498         I915_WRITE(_PIPEBCONF, dev_priv->regfile.savePIPEBCONF);
 499
 500         i915_restore_palette(dev, PIPE_B);
 501         /* Enable the plane */
 502         I915_WRITE(_DSPBCNTR, dev_priv->regfile.saveDSPBCNTR);
 503         I915_WRITE(_DSPBADDR, I915_READ(_DSPBADDR));
 504
 505         /* Cursor state */
 506         I915_WRITE(_CURAPOS, dev_priv->regfile.saveCURAPOS);
 507         I915_WRITE(_CURACNTR, dev_priv->regfile.saveCURACNTR);
 508         I915_WRITE(_CURABASE, dev_priv->regfile.saveCURABASE);
 509         I915_WRITE(_CURBPOS, dev_priv->regfile.saveCURBPOS);
 510         I915_WRITE(_CURBCNTR, dev_priv->regfile.saveCURBCNTR);
 511         I915_WRITE(_CURBBASE, dev_priv->regfile.saveCURBBASE);
 512         if (IS_GEN2(dev))
 513                 I915_WRITE(CURSIZE, dev_priv->regfile.saveCURSIZE);
 514
 515         /* CRT state */
 516         if (HAS_PCH_SPLIT(dev))
 517                 I915_WRITE(PCH_ADPA, dev_priv->regfile.saveADPA);
 518         else
 519                 I915_WRITE(ADPA, dev_priv->regfile.saveADPA);
 520
 521         /* Display Port state */
 522         if (SUPPORTS_INTEGRATED_DP(dev)) {
 523                 I915_WRITE(DP_B, dev_priv->regfile.saveDP_B);
 524                 I915_WRITE(DP_C, dev_priv->regfile.saveDP_C);
 525                 I915_WRITE(DP_D, dev_priv->regfile.saveDP_D);
 526         }
 527         /* FIXME: restore TV & SDVO state */
 528
 529         return;
 530 }