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 "i915_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
  36         if (pipe == PIPE_A)
  37                 return (I915_READ(DPLL_A) & DPLL_VCO_ENABLE);
  38         else
  39                 return (I915_READ(DPLL_B) & DPLL_VCO_ENABLE);
  40 }
  41
  42 static void i915_save_palette(struct drm_device *dev, enum pipe pipe)
  43 {
  44         struct drm_i915_private *dev_priv = dev->dev_private;
  45         unsigned long reg = (pipe == PIPE_A ? PALETTE_A : PALETTE_B);
  46         u32 *array;
  47         int i;
  48
  49         if (!i915_pipe_enabled(dev, pipe))
  50                 return;
  51
  52         if (pipe == PIPE_A)
  53                 array = dev_priv->save_palette_a;
  54         else
  55                 array = dev_priv->save_palette_b;
  56
  57         for(i = 0; i < 256; i++)
  58                 array[i] = I915_READ(reg + (i << 2));
  59 }
  60
  61 static void i915_restore_palette(struct drm_device *dev, enum pipe pipe)
  62 {
  63         struct drm_i915_private *dev_priv = dev->dev_private;
  64         unsigned long reg = (pipe == PIPE_A ? PALETTE_A : PALETTE_B);
  65         u32 *array;
  66         int i;
  67
  68         if (!i915_pipe_enabled(dev, pipe))
  69                 return;
  70
  71         if (pipe == PIPE_A)
  72                 array = dev_priv->save_palette_a;
  73         else
  74                 array = dev_priv->save_palette_b;
  75
  76         for(i = 0; i < 256; i++)
  77                 I915_WRITE(reg + (i << 2), array[i]);
  78 }
  79
  80 static u8 i915_read_indexed(struct drm_device *dev, u16 index_port, u16 data_port, u8 reg)
  81 {
  82         struct drm_i915_private *dev_priv = dev->dev_private;
  83
  84         I915_WRITE8(index_port, reg);
  85         return I915_READ8(data_port);
  86 }
  87
  88 static u8 i915_read_ar(struct drm_device *dev, u16 st01, u8 reg, u16 palette_enable)
  89 {
  90         struct drm_i915_private *dev_priv = dev->dev_private;
  91
  92         I915_READ8(st01);
  93         I915_WRITE8(VGA_AR_INDEX, palette_enable | reg);
  94         return I915_READ8(VGA_AR_DATA_READ);
  95 }
  96
  97 static void i915_write_ar(struct drm_device *dev, u16 st01, u8 reg, u8 val, u16 palette_enable)
  98 {
  99         struct drm_i915_private *dev_priv = dev->dev_private;
 100
 101         I915_READ8(st01);
 102         I915_WRITE8(VGA_AR_INDEX, palette_enable | reg);
 103         I915_WRITE8(VGA_AR_DATA_WRITE, val);
 104 }
 105
 106 static void i915_write_indexed(struct drm_device *dev, u16 index_port, u16 data_port, u8 reg, u8 val)
 107 {
 108         struct drm_i915_private *dev_priv = dev->dev_private;
 109
 110         I915_WRITE8(index_port, reg);
 111         I915_WRITE8(data_port, val);
 112 }
 113
 114 static void i915_save_vga(struct drm_device *dev)
 115 {
 116         struct drm_i915_private *dev_priv = dev->dev_private;
 117         int i;
 118         u16 cr_index, cr_data, st01;
 119
 120         /* VGA color palette registers */
 121         dev_priv->saveDACMASK = I915_READ8(VGA_DACMASK);
 122         /* DACCRX automatically increments during read */
 123         I915_WRITE8(VGA_DACRX, 0);
 124         /* Read 3 bytes of color data from each index */
 125         for (i = 0; i < 256 * 3; i++)
 126                 dev_priv->saveDACDATA[i] = I915_READ8(VGA_DACDATA);
 127
 128         /* MSR bits */
 129         dev_priv->saveMSR = I915_READ8(VGA_MSR_READ);
 130         if (dev_priv->saveMSR & VGA_MSR_CGA_MODE) {
 131                 cr_index = VGA_CR_INDEX_CGA;
 132                 cr_data = VGA_CR_DATA_CGA;
 133                 st01 = VGA_ST01_CGA;
 134         } else {
 135                 cr_index = VGA_CR_INDEX_MDA;
 136                 cr_data = VGA_CR_DATA_MDA;
 137                 st01 = VGA_ST01_MDA;
 138         }
 139
 140         /* CRT controller regs */
 141         i915_write_indexed(dev, cr_index, cr_data, 0x11,
 142                            i915_read_indexed(dev, cr_index, cr_data, 0x11) &
 143                            (~0x80));
 144         for (i = 0; i <= 0x24; i++)
 145                 dev_priv->saveCR[i] =
 146                         i915_read_indexed(dev, cr_index, cr_data, i);
 147         /* Make sure we don't turn off CR group 0 writes */
 148         dev_priv->saveCR[0x11] &= ~0x80;
 149
 150         /* Attribute controller registers */
 151         I915_READ8(st01);
 152         dev_priv->saveAR_INDEX = I915_READ8(VGA_AR_INDEX);
 153         for (i = 0; i <= 0x14; i++)
 154                 dev_priv->saveAR[i] = i915_read_ar(dev, st01, i, 0);
 155         I915_READ8(st01);
 156         I915_WRITE8(VGA_AR_INDEX, dev_priv->saveAR_INDEX);
 157         I915_READ8(st01);
 158
 159         /* Graphics controller registers */
 160         for (i = 0; i < 9; i++)
 161                 dev_priv->saveGR[i] =
 162                         i915_read_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, i);
 163
 164         dev_priv->saveGR[0x10] =
 165                 i915_read_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x10);
 166         dev_priv->saveGR[0x11] =
 167                 i915_read_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x11);
 168         dev_priv->saveGR[0x18] =
 169                 i915_read_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x18);
 170
 171         /* Sequencer registers */
 172         for (i = 0; i < 8; i++)
 173                 dev_priv->saveSR[i] =
 174                         i915_read_indexed(dev, VGA_SR_INDEX, VGA_SR_DATA, i);
 175 }
 176
 177 static void i915_restore_vga(struct drm_device *dev)
 178 {
 179         struct drm_i915_private *dev_priv = dev->dev_private;
 180         int i;
 181         u16 cr_index, cr_data, st01;
 182
 183         /* MSR bits */
 184         I915_WRITE8(VGA_MSR_WRITE, dev_priv->saveMSR);
 185         if (dev_priv->saveMSR & VGA_MSR_CGA_MODE) {
 186                 cr_index = VGA_CR_INDEX_CGA;
 187                 cr_data = VGA_CR_DATA_CGA;
 188                 st01 = VGA_ST01_CGA;
 189         } else {
 190                 cr_index = VGA_CR_INDEX_MDA;
 191                 cr_data = VGA_CR_DATA_MDA;
 192                 st01 = VGA_ST01_MDA;
 193         }
 194
 195         /* Sequencer registers, don't write SR07 */
 196         for (i = 0; i < 7; i++)
 197                 i915_write_indexed(dev, VGA_SR_INDEX, VGA_SR_DATA, i,
 198                                    dev_priv->saveSR[i]);
 199
 200         /* CRT controller regs */
 201         /* Enable CR group 0 writes */
 202         i915_write_indexed(dev, cr_index, cr_data, 0x11, dev_priv->saveCR[0x11]);
 203         for (i = 0; i <= 0x24; i++)
 204                 i915_write_indexed(dev, cr_index, cr_data, i, dev_priv->saveCR[i]);
 205
 206         /* Graphics controller regs */
 207         for (i = 0; i < 9; i++)
 208                 i915_write_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, i,
 209                                    dev_priv->saveGR[i]);
 210
 211         i915_write_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x10,
 212                            dev_priv->saveGR[0x10]);
 213         i915_write_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x11,
 214                            dev_priv->saveGR[0x11]);
 215         i915_write_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x18,
 216                            dev_priv->saveGR[0x18]);
 217
 218         /* Attribute controller registers */
 219         I915_READ8(st01); /* switch back to index mode */
 220         for (i = 0; i <= 0x14; i++)
 221                 i915_write_ar(dev, st01, i, dev_priv->saveAR[i], 0);
 222         I915_READ8(st01); /* switch back to index mode */
 223         I915_WRITE8(VGA_AR_INDEX, dev_priv->saveAR_INDEX | 0x20);
 224         I915_READ8(st01);
 225
 226         /* VGA color palette registers */
 227         I915_WRITE8(VGA_DACMASK, dev_priv->saveDACMASK);
 228         /* DACCRX automatically increments during read */
 229         I915_WRITE8(VGA_DACWX, 0);
 230         /* Read 3 bytes of color data from each index */
 231         for (i = 0; i < 256 * 3; i++)
 232                 I915_WRITE8(VGA_DACDATA, dev_priv->saveDACDATA[i]);
 233
 234 }
 235
 236 int i915_save_state(struct drm_device *dev)
 237 {
 238         struct drm_i915_private *dev_priv = dev->dev_private;
 239         int i;
 240
 241         pci_read_config_byte(dev->pdev, LBB, &dev_priv->saveLBB);
 242
 243         /* Render Standby */
 244         if (IS_I965G(dev) && IS_MOBILE(dev))
 245                 dev_priv->saveRENDERSTANDBY = I915_READ(MCHBAR_RENDER_STANDBY);
 246
 247         /* Hardware status page */
 248         dev_priv->saveHWS = I915_READ(HWS_PGA);
 249
 250         /* Display arbitration control */
 251         dev_priv->saveDSPARB = I915_READ(DSPARB);
 252
 253         /* Pipe & plane A info */
 254         dev_priv->savePIPEACONF = I915_READ(PIPEACONF);
 255         dev_priv->savePIPEASRC = I915_READ(PIPEASRC);
 256         dev_priv->saveFPA0 = I915_READ(FPA0);
 257         dev_priv->saveFPA1 = I915_READ(FPA1);
 258         dev_priv->saveDPLL_A = I915_READ(DPLL_A);
 259         if (IS_I965G(dev))
 260                 dev_priv->saveDPLL_A_MD = I915_READ(DPLL_A_MD);
 261         dev_priv->saveHTOTAL_A = I915_READ(HTOTAL_A);
 262         dev_priv->saveHBLANK_A = I915_READ(HBLANK_A);
 263         dev_priv->saveHSYNC_A = I915_READ(HSYNC_A);
 264         dev_priv->saveVTOTAL_A = I915_READ(VTOTAL_A);
 265         dev_priv->saveVBLANK_A = I915_READ(VBLANK_A);
 266         dev_priv->saveVSYNC_A = I915_READ(VSYNC_A);
 267         dev_priv->saveBCLRPAT_A = I915_READ(BCLRPAT_A);
 268
 269         dev_priv->saveDSPACNTR = I915_READ(DSPACNTR);
 270         dev_priv->saveDSPASTRIDE = I915_READ(DSPASTRIDE);
 271         dev_priv->saveDSPASIZE = I915_READ(DSPASIZE);
 272         dev_priv->saveDSPAPOS = I915_READ(DSPAPOS);
 273         dev_priv->saveDSPAADDR = I915_READ(DSPAADDR);
 274         if (IS_I965G(dev)) {
 275                 dev_priv->saveDSPASURF = I915_READ(DSPASURF);
 276                 dev_priv->saveDSPATILEOFF = I915_READ(DSPATILEOFF);
 277         }
 278         i915_save_palette(dev, PIPE_A);
 279         dev_priv->savePIPEASTAT = I915_READ(PIPEASTAT);
 280
 281         /* Pipe & plane B info */
 282         dev_priv->savePIPEBCONF = I915_READ(PIPEBCONF);
 283         dev_priv->savePIPEBSRC = I915_READ(PIPEBSRC);
 284         dev_priv->saveFPB0 = I915_READ(FPB0);
 285         dev_priv->saveFPB1 = I915_READ(FPB1);
 286         dev_priv->saveDPLL_B = I915_READ(DPLL_B);
 287         if (IS_I965G(dev))
 288                 dev_priv->saveDPLL_B_MD = I915_READ(DPLL_B_MD);
 289         dev_priv->saveHTOTAL_B = I915_READ(HTOTAL_B);
 290         dev_priv->saveHBLANK_B = I915_READ(HBLANK_B);
 291         dev_priv->saveHSYNC_B = I915_READ(HSYNC_B);
 292         dev_priv->saveVTOTAL_B = I915_READ(VTOTAL_B);
 293         dev_priv->saveVBLANK_B = I915_READ(VBLANK_B);
 294         dev_priv->saveVSYNC_B = I915_READ(VSYNC_B);
 295         dev_priv->saveBCLRPAT_A = I915_READ(BCLRPAT_A);
 296
 297         dev_priv->saveDSPBCNTR = I915_READ(DSPBCNTR);
 298         dev_priv->saveDSPBSTRIDE = I915_READ(DSPBSTRIDE);
 299         dev_priv->saveDSPBSIZE = I915_READ(DSPBSIZE);
 300         dev_priv->saveDSPBPOS = I915_READ(DSPBPOS);
 301         dev_priv->saveDSPBADDR = I915_READ(DSPBADDR);
 302         if (IS_I965GM(dev) || IS_GM45(dev)) {
 303                 dev_priv->saveDSPBSURF = I915_READ(DSPBSURF);
 304                 dev_priv->saveDSPBTILEOFF = I915_READ(DSPBTILEOFF);
 305         }
 306         i915_save_palette(dev, PIPE_B);
 307         dev_priv->savePIPEBSTAT = I915_READ(PIPEBSTAT);
 308
 309         /* CRT state */
 310         dev_priv->saveADPA = I915_READ(ADPA);
 311
 312         /* LVDS state */
 313         dev_priv->savePP_CONTROL = I915_READ(PP_CONTROL);
 314         dev_priv->savePFIT_PGM_RATIOS = I915_READ(PFIT_PGM_RATIOS);
 315         dev_priv->saveBLC_PWM_CTL = I915_READ(BLC_PWM_CTL);
 316         if (IS_I965G(dev))
 317                 dev_priv->saveBLC_PWM_CTL2 = I915_READ(BLC_PWM_CTL2);
 318         if (IS_MOBILE(dev) && !IS_I830(dev))
 319                 dev_priv->saveLVDS = I915_READ(LVDS);
 320         if (!IS_I830(dev) && !IS_845G(dev))
 321                 dev_priv->savePFIT_CONTROL = I915_READ(PFIT_CONTROL);
 322         dev_priv->savePP_ON_DELAYS = I915_READ(PP_ON_DELAYS);
 323         dev_priv->savePP_OFF_DELAYS = I915_READ(PP_OFF_DELAYS);
 324         dev_priv->savePP_DIVISOR = I915_READ(PP_DIVISOR);
 325
 326         /* FIXME: save TV & SDVO state */
 327
 328         /* FBC state */
 329         dev_priv->saveFBC_CFB_BASE = I915_READ(FBC_CFB_BASE);
 330         dev_priv->saveFBC_LL_BASE = I915_READ(FBC_LL_BASE);
 331         dev_priv->saveFBC_CONTROL2 = I915_READ(FBC_CONTROL2);
 332         dev_priv->saveFBC_CONTROL = I915_READ(FBC_CONTROL);
 333
 334         /* Interrupt state */
 335         dev_priv->saveIIR = I915_READ(IIR);
 336         dev_priv->saveIER = I915_READ(IER);
 337         dev_priv->saveIMR = I915_READ(IMR);
 338
 339         /* VGA state */
 340         dev_priv->saveVGA0 = I915_READ(VGA0);
 341         dev_priv->saveVGA1 = I915_READ(VGA1);
 342         dev_priv->saveVGA_PD = I915_READ(VGA_PD);
 343         dev_priv->saveVGACNTRL = I915_READ(VGACNTRL);
 344
 345         /* Clock gating state */
 346         dev_priv->saveD_STATE = I915_READ(D_STATE);
 347         dev_priv->saveCG_2D_DIS = I915_READ(CG_2D_DIS);
 348
 349         /* Cache mode state */
 350         dev_priv->saveCACHE_MODE_0 = I915_READ(CACHE_MODE_0);
 351
 352         /* Memory Arbitration state */
 353         dev_priv->saveMI_ARB_STATE = I915_READ(MI_ARB_STATE);
 354
 355         /* Scratch space */
 356         for (i = 0; i < 16; i++) {
 357                 dev_priv->saveSWF0[i] = I915_READ(SWF00 + (i << 2));
 358                 dev_priv->saveSWF1[i] = I915_READ(SWF10 + (i << 2));
 359         }
 360         for (i = 0; i < 3; i++)
 361                 dev_priv->saveSWF2[i] = I915_READ(SWF30 + (i << 2));
 362
 363         i915_save_vga(dev);
 364
 365         return 0;
 366 }
 367
 368 int i915_restore_state(struct drm_device *dev)
 369 {
 370         struct drm_i915_private *dev_priv = dev->dev_private;
 371         int i;
 372
 373         pci_write_config_byte(dev->pdev, LBB, dev_priv->saveLBB);
 374
 375         /* Render Standby */
 376         if (IS_I965G(dev) && IS_MOBILE(dev))
 377                 I915_WRITE(MCHBAR_RENDER_STANDBY, dev_priv->saveRENDERSTANDBY);
 378
 379         /* Hardware status page */
 380         I915_WRITE(HWS_PGA, dev_priv->saveHWS);
 381
 382         /* Display arbitration */
 383         I915_WRITE(DSPARB, dev_priv->saveDSPARB);
 384
 385         /* Pipe & plane A info */
 386         /* Prime the clock */
 387         if (dev_priv->saveDPLL_A & DPLL_VCO_ENABLE) {
 388                 I915_WRITE(DPLL_A, dev_priv->saveDPLL_A &
 389                            ~DPLL_VCO_ENABLE);
 390                 DRM_UDELAY(150);
 391         }
 392         I915_WRITE(FPA0, dev_priv->saveFPA0);
 393         I915_WRITE(FPA1, dev_priv->saveFPA1);
 394         /* Actually enable it */
 395         I915_WRITE(DPLL_A, dev_priv->saveDPLL_A);
 396         DRM_UDELAY(150);
 397         if (IS_I965G(dev))
 398                 I915_WRITE(DPLL_A_MD, dev_priv->saveDPLL_A_MD);
 399         DRM_UDELAY(150);
 400
 401         /* Restore mode */
 402         I915_WRITE(HTOTAL_A, dev_priv->saveHTOTAL_A);
 403         I915_WRITE(HBLANK_A, dev_priv->saveHBLANK_A);
 404         I915_WRITE(HSYNC_A, dev_priv->saveHSYNC_A);
 405         I915_WRITE(VTOTAL_A, dev_priv->saveVTOTAL_A);
 406         I915_WRITE(VBLANK_A, dev_priv->saveVBLANK_A);
 407         I915_WRITE(VSYNC_A, dev_priv->saveVSYNC_A);
 408         I915_WRITE(BCLRPAT_A, dev_priv->saveBCLRPAT_A);
 409
 410         /* Restore plane info */
 411         I915_WRITE(DSPASIZE, dev_priv->saveDSPASIZE);
 412         I915_WRITE(DSPAPOS, dev_priv->saveDSPAPOS);
 413         I915_WRITE(PIPEASRC, dev_priv->savePIPEASRC);
 414         I915_WRITE(DSPAADDR, dev_priv->saveDSPAADDR);
 415         I915_WRITE(DSPASTRIDE, dev_priv->saveDSPASTRIDE);
 416         if (IS_I965G(dev)) {
 417                 I915_WRITE(DSPASURF, dev_priv->saveDSPASURF);
 418                 I915_WRITE(DSPATILEOFF, dev_priv->saveDSPATILEOFF);
 419         }
 420
 421         I915_WRITE(PIPEACONF, dev_priv->savePIPEACONF);
 422
 423         i915_restore_palette(dev, PIPE_A);
 424         /* Enable the plane */
 425         I915_WRITE(DSPACNTR, dev_priv->saveDSPACNTR);
 426         I915_WRITE(DSPAADDR, I915_READ(DSPAADDR));
 427
 428         /* Pipe & plane B info */
 429         if (dev_priv->saveDPLL_B & DPLL_VCO_ENABLE) {
 430                 I915_WRITE(DPLL_B, dev_priv->saveDPLL_B &
 431                            ~DPLL_VCO_ENABLE);
 432                 DRM_UDELAY(150);
 433         }
 434         I915_WRITE(FPB0, dev_priv->saveFPB0);
 435         I915_WRITE(FPB1, dev_priv->saveFPB1);
 436         /* Actually enable it */
 437         I915_WRITE(DPLL_B, dev_priv->saveDPLL_B);
 438         DRM_UDELAY(150);
 439         if (IS_I965G(dev))
 440                 I915_WRITE(DPLL_B_MD, dev_priv->saveDPLL_B_MD);
 441         DRM_UDELAY(150);
 442
 443         /* Restore mode */
 444         I915_WRITE(HTOTAL_B, dev_priv->saveHTOTAL_B);
 445         I915_WRITE(HBLANK_B, dev_priv->saveHBLANK_B);
 446         I915_WRITE(HSYNC_B, dev_priv->saveHSYNC_B);
 447         I915_WRITE(VTOTAL_B, dev_priv->saveVTOTAL_B);
 448         I915_WRITE(VBLANK_B, dev_priv->saveVBLANK_B);
 449         I915_WRITE(VSYNC_B, dev_priv->saveVSYNC_B);
 450         I915_WRITE(BCLRPAT_B, dev_priv->saveBCLRPAT_B);
 451
 452         /* Restore plane info */
 453         I915_WRITE(DSPBSIZE, dev_priv->saveDSPBSIZE);
 454         I915_WRITE(DSPBPOS, dev_priv->saveDSPBPOS);
 455         I915_WRITE(PIPEBSRC, dev_priv->savePIPEBSRC);
 456         I915_WRITE(DSPBADDR, dev_priv->saveDSPBADDR);
 457         I915_WRITE(DSPBSTRIDE, dev_priv->saveDSPBSTRIDE);
 458         if (IS_I965G(dev)) {
 459                 I915_WRITE(DSPBSURF, dev_priv->saveDSPBSURF);
 460                 I915_WRITE(DSPBTILEOFF, dev_priv->saveDSPBTILEOFF);
 461         }
 462
 463         I915_WRITE(PIPEBCONF, dev_priv->savePIPEBCONF);
 464
 465         i915_restore_palette(dev, PIPE_B);
 466         /* Enable the plane */
 467         I915_WRITE(DSPBCNTR, dev_priv->saveDSPBCNTR);
 468         I915_WRITE(DSPBADDR, I915_READ(DSPBADDR));
 469
 470         /* CRT state */
 471         I915_WRITE(ADPA, dev_priv->saveADPA);
 472
 473         /* LVDS state */
 474         if (IS_I965G(dev))
 475                 I915_WRITE(BLC_PWM_CTL2, dev_priv->saveBLC_PWM_CTL2);
 476         if (IS_MOBILE(dev) && !IS_I830(dev))
 477                 I915_WRITE(LVDS, dev_priv->saveLVDS);
 478         if (!IS_I830(dev) && !IS_845G(dev))
 479                 I915_WRITE(PFIT_CONTROL, dev_priv->savePFIT_CONTROL);
 480
 481         I915_WRITE(PFIT_PGM_RATIOS, dev_priv->savePFIT_PGM_RATIOS);
 482         I915_WRITE(BLC_PWM_CTL, dev_priv->saveBLC_PWM_CTL);
 483         I915_WRITE(PP_ON_DELAYS, dev_priv->savePP_ON_DELAYS);
 484         I915_WRITE(PP_OFF_DELAYS, dev_priv->savePP_OFF_DELAYS);
 485         I915_WRITE(PP_DIVISOR, dev_priv->savePP_DIVISOR);
 486         I915_WRITE(PP_CONTROL, dev_priv->savePP_CONTROL);
 487
 488         /* FIXME: restore TV & SDVO state */
 489
 490         /* FBC info */
 491         I915_WRITE(FBC_CFB_BASE, dev_priv->saveFBC_CFB_BASE);
 492         I915_WRITE(FBC_LL_BASE, dev_priv->saveFBC_LL_BASE);
 493         I915_WRITE(FBC_CONTROL2, dev_priv->saveFBC_CONTROL2);
 494         I915_WRITE(FBC_CONTROL, dev_priv->saveFBC_CONTROL);
 495
 496         /* VGA state */
 497         I915_WRITE(VGACNTRL, dev_priv->saveVGACNTRL);
 498         I915_WRITE(VGA0, dev_priv->saveVGA0);
 499         I915_WRITE(VGA1, dev_priv->saveVGA1);
 500         I915_WRITE(VGA_PD, dev_priv->saveVGA_PD);
 501         DRM_UDELAY(150);
 502
 503         /* Clock gating state */
 504         I915_WRITE (D_STATE, dev_priv->saveD_STATE);
 505         I915_WRITE (CG_2D_DIS, dev_priv->saveCG_2D_DIS);
 506
 507         /* Cache mode state */
 508         I915_WRITE (CACHE_MODE_0, dev_priv->saveCACHE_MODE_0 | 0xffff0000);
 509
 510         /* Memory arbitration state */
 511         I915_WRITE (MI_ARB_STATE, dev_priv->saveMI_ARB_STATE | 0xffff0000);
 512
 513         for (i = 0; i < 16; i++) {
 514                 I915_WRITE(SWF00 + (i << 2), dev_priv->saveSWF0[i]);
 515                 I915_WRITE(SWF10 + (i << 2), dev_priv->saveSWF1[i+7]);
 516         }
 517         for (i = 0; i < 3; i++)
 518                 I915_WRITE(SWF30 + (i << 2), dev_priv->saveSWF2[i]);
 519
 520         i915_restore_vga(dev);
 521
 522         return 0;
 523 }
 524