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 unsigned long flags; 196 197 /* Display arbitration control */ 198 if (INTEL_INFO(dev)->gen <= 4) 199 dev_priv->regfile.saveDSPARB = I915_READ(DSPARB); 200 201 /* This is only meaningful in non-KMS mode */ 202 /* Don't regfile.save them in KMS mode */ 203 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 204 i915_save_display_reg(dev); 205 206 spin_lock_irqsave(&dev_priv->backlight.lock, flags); 207 208 /* LVDS state */ 209 if (HAS_PCH_SPLIT(dev)) { 210 dev_priv->regfile.savePP_CONTROL = I915_READ(PCH_PP_CONTROL); 211 dev_priv->regfile.saveBLC_PWM_CTL = I915_READ(BLC_PWM_PCH_CTL1); 212 dev_priv->regfile.saveBLC_PWM_CTL2 = I915_READ(BLC_PWM_PCH_CTL2); 213 dev_priv->regfile.saveBLC_CPU_PWM_CTL = I915_READ(BLC_PWM_CPU_CTL); 214 dev_priv->regfile.saveBLC_CPU_PWM_CTL2 = I915_READ(BLC_PWM_CPU_CTL2); 215 if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev)) 216 dev_priv->regfile.saveLVDS = I915_READ(PCH_LVDS); 217 } else { 218 dev_priv->regfile.savePP_CONTROL = I915_READ(PP_CONTROL); 219 dev_priv->regfile.savePFIT_PGM_RATIOS = I915_READ(PFIT_PGM_RATIOS); 220 dev_priv->regfile.saveBLC_PWM_CTL = I915_READ(BLC_PWM_CTL); 221 dev_priv->regfile.saveBLC_HIST_CTL = I915_READ(BLC_HIST_CTL); 222 if (INTEL_INFO(dev)->gen >= 4) 223 dev_priv->regfile.saveBLC_PWM_CTL2 = I915_READ(BLC_PWM_CTL2); 224 if (IS_MOBILE(dev) && !IS_I830(dev)) 225 dev_priv->regfile.saveLVDS = I915_READ(LVDS); 226 } 227 228 spin_unlock_irqrestore(&dev_priv->backlight.lock, flags); 229 230 if (!IS_I830(dev) && !IS_845G(dev) && !HAS_PCH_SPLIT(dev)) 231 dev_priv->regfile.savePFIT_CONTROL = I915_READ(PFIT_CONTROL); 232 233 if (HAS_PCH_SPLIT(dev)) { 234 dev_priv->regfile.savePP_ON_DELAYS = I915_READ(PCH_PP_ON_DELAYS); 235 dev_priv->regfile.savePP_OFF_DELAYS = I915_READ(PCH_PP_OFF_DELAYS); 236 dev_priv->regfile.savePP_DIVISOR = I915_READ(PCH_PP_DIVISOR); 237 } else { 238 dev_priv->regfile.savePP_ON_DELAYS = I915_READ(PP_ON_DELAYS); 239 dev_priv->regfile.savePP_OFF_DELAYS = I915_READ(PP_OFF_DELAYS); 240 dev_priv->regfile.savePP_DIVISOR = I915_READ(PP_DIVISOR); 241 } 242 243 /* Only regfile.save FBC state on the platform that supports FBC */ 244 if (I915_HAS_FBC(dev)) { 245 if (HAS_PCH_SPLIT(dev)) { 246 dev_priv->regfile.saveDPFC_CB_BASE = I915_READ(ILK_DPFC_CB_BASE); 247 } else if (IS_GM45(dev)) { 248 dev_priv->regfile.saveDPFC_CB_BASE = I915_READ(DPFC_CB_BASE); 249 } else { 250 dev_priv->regfile.saveFBC_CFB_BASE = I915_READ(FBC_CFB_BASE); 251 dev_priv->regfile.saveFBC_LL_BASE = I915_READ(FBC_LL_BASE); 252 dev_priv->regfile.saveFBC_CONTROL2 = I915_READ(FBC_CONTROL2); 253 dev_priv->regfile.saveFBC_CONTROL = I915_READ(FBC_CONTROL); 254 } 255 } 256 257 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 258 i915_save_vga(dev); 259 } 260 261 static void i915_restore_display(struct drm_device *dev) 262 { 263 struct drm_i915_private *dev_priv = dev->dev_private; 264 u32 mask = 0xffffffff; 265 unsigned long flags; 266 267 /* Display arbitration */ 268 if (INTEL_INFO(dev)->gen <= 4) 269 I915_WRITE(DSPARB, dev_priv->regfile.saveDSPARB); 270 271 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 272 i915_restore_display_reg(dev); 273 274 spin_lock_irqsave(&dev_priv->backlight.lock, flags); 275 276 /* LVDS state */ 277 if (INTEL_INFO(dev)->gen >= 4 && !HAS_PCH_SPLIT(dev)) 278 I915_WRITE(BLC_PWM_CTL2, dev_priv->regfile.saveBLC_PWM_CTL2); 279 280 if (drm_core_check_feature(dev, DRIVER_MODESET)) 281 mask = ~LVDS_PORT_EN; 282 283 if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev)) 284 I915_WRITE(PCH_LVDS, dev_priv->regfile.saveLVDS & mask); 285 else if (INTEL_INFO(dev)->gen <= 4 && IS_MOBILE(dev) && !IS_I830(dev)) 286 I915_WRITE(LVDS, dev_priv->regfile.saveLVDS & mask); 287 288 if (!IS_I830(dev) && !IS_845G(dev) && !HAS_PCH_SPLIT(dev)) 289 I915_WRITE(PFIT_CONTROL, dev_priv->regfile.savePFIT_CONTROL); 290 291 if (HAS_PCH_SPLIT(dev)) { 292 I915_WRITE(BLC_PWM_PCH_CTL1, dev_priv->regfile.saveBLC_PWM_CTL); 293 I915_WRITE(BLC_PWM_PCH_CTL2, dev_priv->regfile.saveBLC_PWM_CTL2); 294 /* NOTE: BLC_PWM_CPU_CTL must be written after BLC_PWM_CPU_CTL2; 295 * otherwise we get blank eDP screen after S3 on some machines 296 */ 297 I915_WRITE(BLC_PWM_CPU_CTL2, dev_priv->regfile.saveBLC_CPU_PWM_CTL2); 298 I915_WRITE(BLC_PWM_CPU_CTL, dev_priv->regfile.saveBLC_CPU_PWM_CTL); 299 I915_WRITE(PCH_PP_ON_DELAYS, dev_priv->regfile.savePP_ON_DELAYS); 300 I915_WRITE(PCH_PP_OFF_DELAYS, dev_priv->regfile.savePP_OFF_DELAYS); 301 I915_WRITE(PCH_PP_DIVISOR, dev_priv->regfile.savePP_DIVISOR); 302 I915_WRITE(PCH_PP_CONTROL, dev_priv->regfile.savePP_CONTROL); 303 I915_WRITE(RSTDBYCTL, 304 dev_priv->regfile.saveMCHBAR_RENDER_STANDBY); 305 } else { 306 I915_WRITE(PFIT_PGM_RATIOS, dev_priv->regfile.savePFIT_PGM_RATIOS); 307 I915_WRITE(BLC_PWM_CTL, dev_priv->regfile.saveBLC_PWM_CTL); 308 I915_WRITE(BLC_HIST_CTL, dev_priv->regfile.saveBLC_HIST_CTL); 309 I915_WRITE(PP_ON_DELAYS, dev_priv->regfile.savePP_ON_DELAYS); 310 I915_WRITE(PP_OFF_DELAYS, dev_priv->regfile.savePP_OFF_DELAYS); 311 I915_WRITE(PP_DIVISOR, dev_priv->regfile.savePP_DIVISOR); 312 I915_WRITE(PP_CONTROL, dev_priv->regfile.savePP_CONTROL); 313 } 314 315 spin_unlock_irqrestore(&dev_priv->backlight.lock, flags); 316 317 /* only restore FBC info on the platform that supports FBC*/ 318 intel_disable_fbc(dev); 319 if (I915_HAS_FBC(dev)) { 320 if (HAS_PCH_SPLIT(dev)) { 321 I915_WRITE(ILK_DPFC_CB_BASE, dev_priv->regfile.saveDPFC_CB_BASE); 322 } else if (IS_GM45(dev)) { 323 I915_WRITE(DPFC_CB_BASE, dev_priv->regfile.saveDPFC_CB_BASE); 324 } else { 325 I915_WRITE(FBC_CFB_BASE, dev_priv->regfile.saveFBC_CFB_BASE); 326 I915_WRITE(FBC_LL_BASE, dev_priv->regfile.saveFBC_LL_BASE); 327 I915_WRITE(FBC_CONTROL2, dev_priv->regfile.saveFBC_CONTROL2); 328 I915_WRITE(FBC_CONTROL, dev_priv->regfile.saveFBC_CONTROL); 329 } 330 } 331 332 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 333 i915_restore_vga(dev); 334 else 335 i915_redisable_vga(dev); 336 } 337 338 int i915_save_state(struct drm_device *dev) 339 { 340 struct drm_i915_private *dev_priv = dev->dev_private; 341 int i; 342 343 pci_read_config_byte(dev->pdev, LBB, &dev_priv->regfile.saveLBB); 344 345 mutex_lock(&dev->struct_mutex); 346 347 i915_save_display(dev); 348 349 if (!drm_core_check_feature(dev, DRIVER_MODESET)) { 350 /* Interrupt state */ 351 if (HAS_PCH_SPLIT(dev)) { 352 dev_priv->regfile.saveDEIER = I915_READ(DEIER); 353 dev_priv->regfile.saveDEIMR = I915_READ(DEIMR); 354 dev_priv->regfile.saveGTIER = I915_READ(GTIER); 355 dev_priv->regfile.saveGTIMR = I915_READ(GTIMR); 356 dev_priv->regfile.saveFDI_RXA_IMR = I915_READ(_FDI_RXA_IMR); 357 dev_priv->regfile.saveFDI_RXB_IMR = I915_READ(_FDI_RXB_IMR); 358 dev_priv->regfile.saveMCHBAR_RENDER_STANDBY = 359 I915_READ(RSTDBYCTL); 360 dev_priv->regfile.savePCH_PORT_HOTPLUG = I915_READ(PCH_PORT_HOTPLUG); 361 } else { 362 dev_priv->regfile.saveIER = I915_READ(IER); 363 dev_priv->regfile.saveIMR = I915_READ(IMR); 364 } 365 } 366 367 intel_disable_gt_powersave(dev); 368 369 /* Cache mode state */ 370 dev_priv->regfile.saveCACHE_MODE_0 = I915_READ(CACHE_MODE_0); 371 372 /* Memory Arbitration state */ 373 dev_priv->regfile.saveMI_ARB_STATE = I915_READ(MI_ARB_STATE); 374 375 /* Scratch space */ 376 for (i = 0; i < 16; i++) { 377 dev_priv->regfile.saveSWF0[i] = I915_READ(SWF00 + (i << 2)); 378 dev_priv->regfile.saveSWF1[i] = I915_READ(SWF10 + (i << 2)); 379 } 380 for (i = 0; i < 3; i++) 381 dev_priv->regfile.saveSWF2[i] = I915_READ(SWF30 + (i << 2)); 382 383 mutex_unlock(&dev->struct_mutex); 384 385 return 0; 386 } 387 388 int i915_restore_state(struct drm_device *dev) 389 { 390 struct drm_i915_private *dev_priv = dev->dev_private; 391 int i; 392 393 pci_write_config_byte(dev->pdev, LBB, dev_priv->regfile.saveLBB); 394 395 mutex_lock(&dev->struct_mutex); 396 397 i915_gem_restore_fences(dev); 398 i915_restore_display(dev); 399 400 if (!drm_core_check_feature(dev, DRIVER_MODESET)) { 401 /* Interrupt state */ 402 if (HAS_PCH_SPLIT(dev)) { 403 I915_WRITE(DEIER, dev_priv->regfile.saveDEIER); 404 I915_WRITE(DEIMR, dev_priv->regfile.saveDEIMR); 405 I915_WRITE(GTIER, dev_priv->regfile.saveGTIER); 406 I915_WRITE(GTIMR, dev_priv->regfile.saveGTIMR); 407 I915_WRITE(_FDI_RXA_IMR, dev_priv->regfile.saveFDI_RXA_IMR); 408 I915_WRITE(_FDI_RXB_IMR, dev_priv->regfile.saveFDI_RXB_IMR); 409 I915_WRITE(PCH_PORT_HOTPLUG, dev_priv->regfile.savePCH_PORT_HOTPLUG); 410 } else { 411 I915_WRITE(IER, dev_priv->regfile.saveIER); 412 I915_WRITE(IMR, dev_priv->regfile.saveIMR); 413 } 414 } 415 416 /* Cache mode state */ 417 I915_WRITE(CACHE_MODE_0, dev_priv->regfile.saveCACHE_MODE_0 | 0xffff0000); 418 419 /* Memory arbitration state */ 420 I915_WRITE(MI_ARB_STATE, dev_priv->regfile.saveMI_ARB_STATE | 0xffff0000); 421 422 for (i = 0; i < 16; i++) { 423 I915_WRITE(SWF00 + (i << 2), dev_priv->regfile.saveSWF0[i]); 424 I915_WRITE(SWF10 + (i << 2), dev_priv->regfile.saveSWF1[i]); 425 } 426 for (i = 0; i < 3; i++) 427 I915_WRITE(SWF30 + (i << 2), dev_priv->regfile.saveSWF2[i]); 428 429 mutex_unlock(&dev->struct_mutex); 430 431 intel_i2c_reset(dev); 432 433 return 0; 434 } 435