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 32static 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 40static 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 49static 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 58static 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 66static 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 130static 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 192static 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 247static 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 304int 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 /* Cache mode state */ 332 if (INTEL_INFO(dev)->gen < 7) 333 dev_priv->regfile.saveCACHE_MODE_0 = I915_READ(CACHE_MODE_0); 334 335 /* Memory Arbitration state */ 336 dev_priv->regfile.saveMI_ARB_STATE = I915_READ(MI_ARB_STATE); 337 338 /* Scratch space */ 339 for (i = 0; i < 16; i++) { 340 dev_priv->regfile.saveSWF0[i] = I915_READ(SWF00 + (i << 2)); 341 dev_priv->regfile.saveSWF1[i] = I915_READ(SWF10 + (i << 2)); 342 } 343 for (i = 0; i < 3; i++) 344 dev_priv->regfile.saveSWF2[i] = I915_READ(SWF30 + (i << 2)); 345 346 mutex_unlock(&dev->struct_mutex); 347 348 return 0; 349} 350 351int i915_restore_state(struct drm_device *dev) 352{ 353 struct drm_i915_private *dev_priv = dev->dev_private; 354 int i; 355 356 mutex_lock(&dev->struct_mutex); 357 358 i915_gem_restore_fences(dev); 359 i915_restore_display(dev); 360 361 if (!drm_core_check_feature(dev, DRIVER_MODESET)) { 362 /* Interrupt state */ 363 if (HAS_PCH_SPLIT(dev)) { 364 I915_WRITE(DEIER, dev_priv->regfile.saveDEIER); 365 I915_WRITE(DEIMR, dev_priv->regfile.saveDEIMR); 366 I915_WRITE(GTIER, dev_priv->regfile.saveGTIER); 367 I915_WRITE(GTIMR, dev_priv->regfile.saveGTIMR); 368 I915_WRITE(_FDI_RXA_IMR, dev_priv->regfile.saveFDI_RXA_IMR); 369 I915_WRITE(_FDI_RXB_IMR, dev_priv->regfile.saveFDI_RXB_IMR); 370 I915_WRITE(PCH_PORT_HOTPLUG, dev_priv->regfile.savePCH_PORT_HOTPLUG); 371 } else { 372 I915_WRITE(IER, dev_priv->regfile.saveIER); 373 I915_WRITE(IMR, dev_priv->regfile.saveIMR); 374 } 375 } 376 377 /* Cache mode state */ 378 if (INTEL_INFO(dev)->gen < 7) 379 I915_WRITE(CACHE_MODE_0, dev_priv->regfile.saveCACHE_MODE_0 | 380 0xffff0000); 381 382 /* Memory arbitration state */ 383 I915_WRITE(MI_ARB_STATE, dev_priv->regfile.saveMI_ARB_STATE | 0xffff0000); 384 385 for (i = 0; i < 16; i++) { 386 I915_WRITE(SWF00 + (i << 2), dev_priv->regfile.saveSWF0[i]); 387 I915_WRITE(SWF10 + (i << 2), dev_priv->regfile.saveSWF1[i]); 388 } 389 for (i = 0; i < 3; i++) 390 I915_WRITE(SWF30 + (i << 2), dev_priv->regfile.saveSWF2[i]); 391 392 mutex_unlock(&dev->struct_mutex); 393 394 intel_i2c_reset(dev); 395 396 return 0; 397} 398