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 <drm/drmP.h>
  28 #include <drm/i915_drm.h>
  29 #include "intel_drv.h"
  30 #include "i915_reg.h"
  31
  32 static u8 i915_read_indexed(struct drm_device *dev, u16 index_port, u16 data_port, u8 reg)
  33 {
  34         struct drm_i915_private *dev_priv = dev->dev_private;
  35
  36         I915_WRITE8(index_port, reg);
  37         return I915_READ8(data_port);
  38 }
  39
  40 static u8 i915_read_ar(struct drm_device *dev, u16 st01, u8 reg, u16 palette_enable)
  41 {
  42         struct drm_i915_private *dev_priv = dev->dev_private;
  43
  44         I915_READ8(st01);
  45         I915_WRITE8(VGA_AR_INDEX, palette_enable | reg);
  46         return I915_READ8(VGA_AR_DATA_READ);
  47 }
  48
  49 static void i915_write_ar(struct drm_device *dev, u16 st01, u8 reg, u8 val, u16 palette_enable)
  50 {
  51         struct drm_i915_private *dev_priv = dev->dev_private;
  52
  53         I915_READ8(st01);
  54         I915_WRITE8(VGA_AR_INDEX, palette_enable | reg);
  55         I915_WRITE8(VGA_AR_DATA_WRITE, val);
  56 }
  57
  58 static void i915_write_indexed(struct drm_device *dev, u16 index_port, u16 data_port, u8 reg, u8 val)
  59 {
  60         struct drm_i915_private *dev_priv = dev->dev_private;
  61
  62         I915_WRITE8(index_port, reg);
  63         I915_WRITE8(data_port, val);
  64 }
  65
  66 static void i915_save_vga(struct drm_device *dev)
  67 {
  68         struct drm_i915_private *dev_priv = dev->dev_private;
  69         int i;
  70         u16 cr_index, cr_data, st01;
  71
  72         /* VGA state */
  73         dev_priv->regfile.saveVGA0 = I915_READ(VGA0);
  74         dev_priv->regfile.saveVGA1 = I915_READ(VGA1);
  75         dev_priv->regfile.saveVGA_PD = I915_READ(VGA_PD);
  76         dev_priv->regfile.saveVGACNTRL = I915_READ(i915_vgacntrl_reg(dev));
  77
  78         /* VGA color palette registers */
  79         dev_priv->regfile.saveDACMASK = I915_READ8(VGA_DACMASK);
  80
  81         /* MSR bits */
  82         dev_priv->regfile.saveMSR = I915_READ8(VGA_MSR_READ);
  83         if (dev_priv->regfile.saveMSR & VGA_MSR_CGA_MODE) {
  84                 cr_index = VGA_CR_INDEX_CGA;
  85                 cr_data = VGA_CR_DATA_CGA;
  86                 st01 = VGA_ST01_CGA;
  87         } else {
  88                 cr_index = VGA_CR_INDEX_MDA;
  89                 cr_data = VGA_CR_DATA_MDA;
  90                 st01 = VGA_ST01_MDA;
  91         }
  92
  93         /* CRT controller regs */
  94         i915_write_indexed(dev, cr_index, cr_data, 0x11,
  95                            i915_read_indexed(dev, cr_index, cr_data, 0x11) &
  96                            (~0x80));
  97         for (i = 0; i <= 0x24; i++)
  98                 dev_priv->regfile.saveCR[i] =
  99                         i915_read_indexed(dev, cr_index, cr_data, i);
 100         /* Make sure we don't turn off CR group 0 writes */
 101         dev_priv->regfile.saveCR[0x11] &= ~0x80;
 102
 103         /* Attribute controller registers */
 104         I915_READ8(st01);
 105         dev_priv->regfile.saveAR_INDEX = I915_READ8(VGA_AR_INDEX);
 106         for (i = 0; i <= 0x14; i++)
 107                 dev_priv->regfile.saveAR[i] = i915_read_ar(dev, st01, i, 0);
 108         I915_READ8(st01);
 109         I915_WRITE8(VGA_AR_INDEX, dev_priv->regfile.saveAR_INDEX);
 110         I915_READ8(st01);
 111
 112         /* Graphics controller registers */
 113         for (i = 0; i < 9; i++)
 114                 dev_priv->regfile.saveGR[i] =
 115                         i915_read_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, i);
 116
 117         dev_priv->regfile.saveGR[0x10] =
 118                 i915_read_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x10);
 119         dev_priv->regfile.saveGR[0x11] =
 120                 i915_read_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x11);
 121         dev_priv->regfile.saveGR[0x18] =
 122                 i915_read_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x18);
 123
 124         /* Sequencer registers */
 125         for (i = 0; i < 8; i++)
 126                 dev_priv->regfile.saveSR[i] =
 127                         i915_read_indexed(dev, VGA_SR_INDEX, VGA_SR_DATA, i);
 128 }
 129
 130 static void i915_restore_vga(struct drm_device *dev)
 131 {
 132         struct drm_i915_private *dev_priv = dev->dev_private;
 133         int i;
 134         u16 cr_index, cr_data, st01;
 135
 136         /* VGA state */
 137         I915_WRITE(i915_vgacntrl_reg(dev), dev_priv->regfile.saveVGACNTRL);
 138
 139         I915_WRITE(VGA0, dev_priv->regfile.saveVGA0);
 140         I915_WRITE(VGA1, dev_priv->regfile.saveVGA1);
 141         I915_WRITE(VGA_PD, dev_priv->regfile.saveVGA_PD);
 142         POSTING_READ(VGA_PD);
 143         udelay(150);
 144
 145         /* MSR bits */
 146         I915_WRITE8(VGA_MSR_WRITE, dev_priv->regfile.saveMSR);
 147         if (dev_priv->regfile.saveMSR & VGA_MSR_CGA_MODE) {
 148                 cr_index = VGA_CR_INDEX_CGA;
 149                 cr_data = VGA_CR_DATA_CGA;
 150                 st01 = VGA_ST01_CGA;
 151         } else {
 152                 cr_index = VGA_CR_INDEX_MDA;
 153                 cr_data = VGA_CR_DATA_MDA;
 154                 st01 = VGA_ST01_MDA;
 155         }
 156
 157         /* Sequencer registers, don't write SR07 */
 158         for (i = 0; i < 7; i++)
 159                 i915_write_indexed(dev, VGA_SR_INDEX, VGA_SR_DATA, i,
 160                                    dev_priv->regfile.saveSR[i]);
 161
 162         /* CRT controller regs */
 163         /* Enable CR group 0 writes */
 164         i915_write_indexed(dev, cr_index, cr_data, 0x11, dev_priv->regfile.saveCR[0x11]);
 165         for (i = 0; i <= 0x24; i++)
 166                 i915_write_indexed(dev, cr_index, cr_data, i, dev_priv->regfile.saveCR[i]);
 167
 168         /* Graphics controller regs */
 169         for (i = 0; i < 9; i++)
 170                 i915_write_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, i,
 171                                    dev_priv->regfile.saveGR[i]);
 172
 173         i915_write_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x10,
 174                            dev_priv->regfile.saveGR[0x10]);
 175         i915_write_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x11,
 176                            dev_priv->regfile.saveGR[0x11]);
 177         i915_write_indexed(dev, VGA_GR_INDEX, VGA_GR_DATA, 0x18,
 178                            dev_priv->regfile.saveGR[0x18]);
 179
 180         /* Attribute controller registers */
 181         I915_READ8(st01); /* switch back to index mode */
 182         for (i = 0; i <= 0x14; i++)
 183                 i915_write_ar(dev, st01, i, dev_priv->regfile.saveAR[i], 0);
 184         I915_READ8(st01); /* switch back to index mode */
 185         I915_WRITE8(VGA_AR_INDEX, dev_priv->regfile.saveAR_INDEX | 0x20);
 186         I915_READ8(st01);
 187
 188         /* VGA color palette registers */
 189         I915_WRITE8(VGA_DACMASK, dev_priv->regfile.saveDACMASK);
 190 }
 191
 192 static void i915_save_display(struct drm_device *dev)
 193 {
 194         struct drm_i915_private *dev_priv = dev->dev_private;
 195
 196         /* Display arbitration control */
 197         if (INTEL_INFO(dev)->gen <= 4)
 198                 dev_priv->regfile.saveDSPARB = I915_READ(DSPARB);
 199
 200         /* This is only meaningful in non-KMS mode */
 201         /* Don't regfile.save them in KMS mode */
 202         if (!drm_core_check_feature(dev, DRIVER_MODESET))
 203                 i915_save_display_reg(dev);
 204
 205         /* LVDS state */
 206         if (HAS_PCH_SPLIT(dev)) {
 207                 dev_priv->regfile.savePP_CONTROL = I915_READ(PCH_PP_CONTROL);
 208                 if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev))
 209                         dev_priv->regfile.saveLVDS = I915_READ(PCH_LVDS);
 210         } else if (IS_VALLEYVIEW(dev)) {
 211                 dev_priv->regfile.savePP_CONTROL = I915_READ(PP_CONTROL);
 212                 dev_priv->regfile.savePFIT_PGM_RATIOS = I915_READ(PFIT_PGM_RATIOS);
 213
 214                 dev_priv->regfile.saveBLC_HIST_CTL =
 215                         I915_READ(VLV_BLC_HIST_CTL(PIPE_A));
 216                 dev_priv->regfile.saveBLC_HIST_CTL_B =
 217                         I915_READ(VLV_BLC_HIST_CTL(PIPE_B));
 218         } else {
 219                 dev_priv->regfile.savePP_CONTROL = I915_READ(PP_CONTROL);
 220                 dev_priv->regfile.savePFIT_PGM_RATIOS = I915_READ(PFIT_PGM_RATIOS);
 221                 dev_priv->regfile.saveBLC_HIST_CTL = I915_READ(BLC_HIST_CTL);
 222                 if (IS_MOBILE(dev) && !IS_I830(dev))
 223                         dev_priv->regfile.saveLVDS = I915_READ(LVDS);
 224         }
 225
 226         if (!IS_I830(dev) && !IS_845G(dev) && !HAS_PCH_SPLIT(dev))
 227                 dev_priv->regfile.savePFIT_CONTROL = I915_READ(PFIT_CONTROL);
 228
 229         if (HAS_PCH_SPLIT(dev)) {
 230                 dev_priv->regfile.savePP_ON_DELAYS = I915_READ(PCH_PP_ON_DELAYS);
 231                 dev_priv->regfile.savePP_OFF_DELAYS = I915_READ(PCH_PP_OFF_DELAYS);
 232                 dev_priv->regfile.savePP_DIVISOR = I915_READ(PCH_PP_DIVISOR);
 233         } else {
 234                 dev_priv->regfile.savePP_ON_DELAYS = I915_READ(PP_ON_DELAYS);
 235                 dev_priv->regfile.savePP_OFF_DELAYS = I915_READ(PP_OFF_DELAYS);
 236                 dev_priv->regfile.savePP_DIVISOR = I915_READ(PP_DIVISOR);
 237         }
 238
 239         /* save FBC interval */
 240         if (HAS_FBC(dev) && INTEL_INFO(dev)->gen <= 4 && !IS_G4X(dev))
 241                 dev_priv->regfile.saveFBC_CONTROL = I915_READ(FBC_CONTROL);
 242
 243         if (!drm_core_check_feature(dev, DRIVER_MODESET))
 244                 i915_save_vga(dev);
 245 }
 246
 247 static void i915_restore_display(struct drm_device *dev)
 248 {
 249         struct drm_i915_private *dev_priv = dev->dev_private;
 250         u32 mask = 0xffffffff;
 251
 252         /* Display arbitration */
 253         if (INTEL_INFO(dev)->gen <= 4)
 254                 I915_WRITE(DSPARB, dev_priv->regfile.saveDSPARB);
 255
 256         if (!drm_core_check_feature(dev, DRIVER_MODESET))
 257                 i915_restore_display_reg(dev);
 258
 259         if (drm_core_check_feature(dev, DRIVER_MODESET))
 260                 mask = ~LVDS_PORT_EN;
 261
 262         if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev))
 263                 I915_WRITE(PCH_LVDS, dev_priv->regfile.saveLVDS & mask);
 264         else if (INTEL_INFO(dev)->gen <= 4 && IS_MOBILE(dev) && !IS_I830(dev))
 265                 I915_WRITE(LVDS, dev_priv->regfile.saveLVDS & mask);
 266
 267         if (!IS_I830(dev) && !IS_845G(dev) && !HAS_PCH_SPLIT(dev))
 268                 I915_WRITE(PFIT_CONTROL, dev_priv->regfile.savePFIT_CONTROL);
 269
 270         if (HAS_PCH_SPLIT(dev)) {
 271                 I915_WRITE(PCH_PP_ON_DELAYS, dev_priv->regfile.savePP_ON_DELAYS);
 272                 I915_WRITE(PCH_PP_OFF_DELAYS, dev_priv->regfile.savePP_OFF_DELAYS);
 273                 I915_WRITE(PCH_PP_DIVISOR, dev_priv->regfile.savePP_DIVISOR);
 274                 I915_WRITE(PCH_PP_CONTROL, dev_priv->regfile.savePP_CONTROL);
 275                 I915_WRITE(RSTDBYCTL,
 276                            dev_priv->regfile.saveMCHBAR_RENDER_STANDBY);
 277         } else if (IS_VALLEYVIEW(dev)) {
 278                 I915_WRITE(VLV_BLC_HIST_CTL(PIPE_A),
 279                            dev_priv->regfile.saveBLC_HIST_CTL);
 280                 I915_WRITE(VLV_BLC_HIST_CTL(PIPE_B),
 281                            dev_priv->regfile.saveBLC_HIST_CTL);
 282         } else {
 283                 I915_WRITE(PFIT_PGM_RATIOS, dev_priv->regfile.savePFIT_PGM_RATIOS);
 284                 I915_WRITE(BLC_HIST_CTL, dev_priv->regfile.saveBLC_HIST_CTL);
 285                 I915_WRITE(PP_ON_DELAYS, dev_priv->regfile.savePP_ON_DELAYS);
 286                 I915_WRITE(PP_OFF_DELAYS, dev_priv->regfile.savePP_OFF_DELAYS);
 287                 I915_WRITE(PP_DIVISOR, dev_priv->regfile.savePP_DIVISOR);
 288                 I915_WRITE(PP_CONTROL, dev_priv->regfile.savePP_CONTROL);
 289         }
 290
 291         /* only restore FBC info on the platform that supports FBC*/
 292         intel_disable_fbc(dev);
 293
 294         /* restore FBC interval */
 295         if (HAS_FBC(dev) && INTEL_INFO(dev)->gen <= 4 && !IS_G4X(dev))
 296                 I915_WRITE(FBC_CONTROL, dev_priv->regfile.saveFBC_CONTROL);
 297
 298         if (!drm_core_check_feature(dev, DRIVER_MODESET))
 299                 i915_restore_vga(dev);
 300         else
 301                 i915_redisable_vga(dev);
 302 }
 303
 304 int i915_save_state(struct drm_device *dev)
 305 {
 306         struct drm_i915_private *dev_priv = dev->dev_private;
 307         int i;
 308
 309         mutex_lock(&dev->struct_mutex);
 310
 311         i915_save_display(dev);
 312
 313         if (!drm_core_check_feature(dev, DRIVER_MODESET)) {
 314                 /* Interrupt state */
 315                 if (HAS_PCH_SPLIT(dev)) {
 316                         dev_priv->regfile.saveDEIER = I915_READ(DEIER);
 317                         dev_priv->regfile.saveDEIMR = I915_READ(DEIMR);
 318                         dev_priv->regfile.saveGTIER = I915_READ(GTIER);
 319                         dev_priv->regfile.saveGTIMR = I915_READ(GTIMR);
 320                         dev_priv->regfile.saveFDI_RXA_IMR = I915_READ(_FDI_RXA_IMR);
 321                         dev_priv->regfile.saveFDI_RXB_IMR = I915_READ(_FDI_RXB_IMR);
 322                         dev_priv->regfile.saveMCHBAR_RENDER_STANDBY =
 323                                 I915_READ(RSTDBYCTL);
 324                         dev_priv->regfile.savePCH_PORT_HOTPLUG = I915_READ(PCH_PORT_HOTPLUG);
 325                 } else {
 326                         dev_priv->regfile.saveIER = I915_READ(IER);
 327                         dev_priv->regfile.saveIMR = I915_READ(IMR);
 328                 }
 329         }
 330
 331         intel_disable_gt_powersave(dev);
 332
 333         /* Cache mode state */
 334         if (INTEL_INFO(dev)->gen < 7)
 335                 dev_priv->regfile.saveCACHE_MODE_0 = I915_READ(CACHE_MODE_0);
 336
 337         /* Memory Arbitration state */
 338         dev_priv->regfile.saveMI_ARB_STATE = I915_READ(MI_ARB_STATE);
 339
 340         /* Scratch space */
 341         for (i = 0; i < 16; i++) {
 342                 dev_priv->regfile.saveSWF0[i] = I915_READ(SWF00 + (i << 2));
 343                 dev_priv->regfile.saveSWF1[i] = I915_READ(SWF10 + (i << 2));
 344         }
 345         for (i = 0; i < 3; i++)
 346                 dev_priv->regfile.saveSWF2[i] = I915_READ(SWF30 + (i << 2));
 347
 348         mutex_unlock(&dev->struct_mutex);
 349
 350         return 0;
 351 }
 352
 353 int i915_restore_state(struct drm_device *dev)
 354 {
 355         struct drm_i915_private *dev_priv = dev->dev_private;
 356         int i;
 357
 358         mutex_lock(&dev->struct_mutex);
 359
 360         i915_gem_restore_fences(dev);
 361         i915_restore_display(dev);
 362
 363         if (!drm_core_check_feature(dev, DRIVER_MODESET)) {
 364                 /* Interrupt state */
 365                 if (HAS_PCH_SPLIT(dev)) {
 366                         I915_WRITE(DEIER, dev_priv->regfile.saveDEIER);
 367                         I915_WRITE(DEIMR, dev_priv->regfile.saveDEIMR);
 368                         I915_WRITE(GTIER, dev_priv->regfile.saveGTIER);
 369                         I915_WRITE(GTIMR, dev_priv->regfile.saveGTIMR);
 370                         I915_WRITE(_FDI_RXA_IMR, dev_priv->regfile.saveFDI_RXA_IMR);
 371                         I915_WRITE(_FDI_RXB_IMR, dev_priv->regfile.saveFDI_RXB_IMR);
 372                         I915_WRITE(PCH_PORT_HOTPLUG, dev_priv->regfile.savePCH_PORT_HOTPLUG);
 373                 } else {
 374                         I915_WRITE(IER, dev_priv->regfile.saveIER);
 375                         I915_WRITE(IMR, dev_priv->regfile.saveIMR);
 376                 }
 377         }
 378
 379         /* Cache mode state */
 380         if (INTEL_INFO(dev)->gen < 7)
 381                 I915_WRITE(CACHE_MODE_0, dev_priv->regfile.saveCACHE_MODE_0 |
 382                            0xffff0000);
 383
 384         /* Memory arbitration state */
 385         I915_WRITE(MI_ARB_STATE, dev_priv->regfile.saveMI_ARB_STATE | 0xffff0000);
 386
 387         for (i = 0; i < 16; i++) {
 388                 I915_WRITE(SWF00 + (i << 2), dev_priv->regfile.saveSWF0[i]);
 389                 I915_WRITE(SWF10 + (i << 2), dev_priv->regfile.saveSWF1[i]);
 390         }
 391         for (i = 0; i < 3; i++)
 392                 I915_WRITE(SWF30 + (i << 2), dev_priv->regfile.saveSWF2[i]);
 393
 394         mutex_unlock(&dev->struct_mutex);
 395
 396         intel_i2c_reset(dev);
 397
 398         return 0;
 399 }