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_IBX(dev) || HAS_PCH_CPT(dev)) 207 dev_priv->regfile.saveLVDS = I915_READ(PCH_LVDS); 208 else if (INTEL_INFO(dev)->gen <= 4 && IS_MOBILE(dev) && !IS_I830(dev)) 209 dev_priv->regfile.saveLVDS = I915_READ(LVDS); 210 211 /* Panel power sequencer */ 212 if (HAS_PCH_SPLIT(dev)) { 213 dev_priv->regfile.savePP_CONTROL = I915_READ(PCH_PP_CONTROL); 214 dev_priv->regfile.savePP_ON_DELAYS = I915_READ(PCH_PP_ON_DELAYS); 215 dev_priv->regfile.savePP_OFF_DELAYS = I915_READ(PCH_PP_OFF_DELAYS); 216 dev_priv->regfile.savePP_DIVISOR = I915_READ(PCH_PP_DIVISOR); 217 } else if (!IS_VALLEYVIEW(dev)) { 218 dev_priv->regfile.savePP_CONTROL = I915_READ(PP_CONTROL); 219 dev_priv->regfile.savePP_ON_DELAYS = I915_READ(PP_ON_DELAYS); 220 dev_priv->regfile.savePP_OFF_DELAYS = I915_READ(PP_OFF_DELAYS); 221 dev_priv->regfile.savePP_DIVISOR = I915_READ(PP_DIVISOR); 222 } 223 224 /* save FBC interval */ 225 if (HAS_FBC(dev) && INTEL_INFO(dev)->gen <= 4 && !IS_G4X(dev)) 226 dev_priv->regfile.saveFBC_CONTROL = I915_READ(FBC_CONTROL); 227 228 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 229 i915_save_vga(dev); 230 } 231 232 static void i915_restore_display(struct drm_device *dev) 233 { 234 struct drm_i915_private *dev_priv = dev->dev_private; 235 u32 mask = 0xffffffff; 236 237 /* Display arbitration */ 238 if (INTEL_INFO(dev)->gen <= 4) 239 I915_WRITE(DSPARB, dev_priv->regfile.saveDSPARB); 240 241 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 242 i915_restore_display_reg(dev); 243 244 if (drm_core_check_feature(dev, DRIVER_MODESET)) 245 mask = ~LVDS_PORT_EN; 246 247 /* LVDS state */ 248 if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev)) 249 I915_WRITE(PCH_LVDS, dev_priv->regfile.saveLVDS & mask); 250 else if (INTEL_INFO(dev)->gen <= 4 && IS_MOBILE(dev) && !IS_I830(dev)) 251 I915_WRITE(LVDS, dev_priv->regfile.saveLVDS & mask); 252 253 /* Panel power sequencer */ 254 if (HAS_PCH_SPLIT(dev)) { 255 I915_WRITE(PCH_PP_ON_DELAYS, dev_priv->regfile.savePP_ON_DELAYS); 256 I915_WRITE(PCH_PP_OFF_DELAYS, dev_priv->regfile.savePP_OFF_DELAYS); 257 I915_WRITE(PCH_PP_DIVISOR, dev_priv->regfile.savePP_DIVISOR); 258 I915_WRITE(PCH_PP_CONTROL, dev_priv->regfile.savePP_CONTROL); 259 } else if (!IS_VALLEYVIEW(dev)) { 260 I915_WRITE(PP_ON_DELAYS, dev_priv->regfile.savePP_ON_DELAYS); 261 I915_WRITE(PP_OFF_DELAYS, dev_priv->regfile.savePP_OFF_DELAYS); 262 I915_WRITE(PP_DIVISOR, dev_priv->regfile.savePP_DIVISOR); 263 I915_WRITE(PP_CONTROL, dev_priv->regfile.savePP_CONTROL); 264 } 265 266 /* only restore FBC info on the platform that supports FBC*/ 267 intel_fbc_disable(dev); 268 269 /* restore FBC interval */ 270 if (HAS_FBC(dev) && INTEL_INFO(dev)->gen <= 4 && !IS_G4X(dev)) 271 I915_WRITE(FBC_CONTROL, dev_priv->regfile.saveFBC_CONTROL); 272 273 if (!drm_core_check_feature(dev, DRIVER_MODESET)) 274 i915_restore_vga(dev); 275 else 276 i915_redisable_vga(dev); 277 } 278 279 int i915_save_state(struct drm_device *dev) 280 { 281 struct drm_i915_private *dev_priv = dev->dev_private; 282 int i; 283 284 mutex_lock(&dev->struct_mutex); 285 286 i915_save_display(dev); 287 288 if (!drm_core_check_feature(dev, DRIVER_MODESET)) { 289 /* Interrupt state */ 290 if (HAS_PCH_SPLIT(dev)) { 291 dev_priv->regfile.saveDEIER = I915_READ(DEIER); 292 dev_priv->regfile.saveDEIMR = I915_READ(DEIMR); 293 dev_priv->regfile.saveGTIER = I915_READ(GTIER); 294 dev_priv->regfile.saveGTIMR = I915_READ(GTIMR); 295 dev_priv->regfile.saveFDI_RXA_IMR = I915_READ(_FDI_RXA_IMR); 296 dev_priv->regfile.saveFDI_RXB_IMR = I915_READ(_FDI_RXB_IMR); 297 dev_priv->regfile.saveMCHBAR_RENDER_STANDBY = 298 I915_READ(RSTDBYCTL); 299 dev_priv->regfile.savePCH_PORT_HOTPLUG = I915_READ(PCH_PORT_HOTPLUG); 300 } else { 301 dev_priv->regfile.saveIER = I915_READ(IER); 302 dev_priv->regfile.saveIMR = I915_READ(IMR); 303 } 304 } 305 306 if (IS_GEN4(dev)) 307 pci_read_config_word(dev->pdev, GCDGMBUS, 308 &dev_priv->regfile.saveGCDGMBUS); 309 310 /* Cache mode state */ 311 if (INTEL_INFO(dev)->gen < 7) 312 dev_priv->regfile.saveCACHE_MODE_0 = I915_READ(CACHE_MODE_0); 313 314 /* Memory Arbitration state */ 315 dev_priv->regfile.saveMI_ARB_STATE = I915_READ(MI_ARB_STATE); 316 317 /* Scratch space */ 318 for (i = 0; i < 16; i++) { 319 dev_priv->regfile.saveSWF0[i] = I915_READ(SWF00 + (i << 2)); 320 dev_priv->regfile.saveSWF1[i] = I915_READ(SWF10 + (i << 2)); 321 } 322 for (i = 0; i < 3; i++) 323 dev_priv->regfile.saveSWF2[i] = I915_READ(SWF30 + (i << 2)); 324 325 mutex_unlock(&dev->struct_mutex); 326 327 return 0; 328 } 329 330 int i915_restore_state(struct drm_device *dev) 331 { 332 struct drm_i915_private *dev_priv = dev->dev_private; 333 int i; 334 335 mutex_lock(&dev->struct_mutex); 336 337 i915_gem_restore_fences(dev); 338 339 if (IS_GEN4(dev)) 340 pci_write_config_word(dev->pdev, GCDGMBUS, 341 dev_priv->regfile.saveGCDGMBUS); 342 i915_restore_display(dev); 343 344 if (!drm_core_check_feature(dev, DRIVER_MODESET)) { 345 /* Interrupt state */ 346 if (HAS_PCH_SPLIT(dev)) { 347 I915_WRITE(DEIER, dev_priv->regfile.saveDEIER); 348 I915_WRITE(DEIMR, dev_priv->regfile.saveDEIMR); 349 I915_WRITE(GTIER, dev_priv->regfile.saveGTIER); 350 I915_WRITE(GTIMR, dev_priv->regfile.saveGTIMR); 351 I915_WRITE(_FDI_RXA_IMR, dev_priv->regfile.saveFDI_RXA_IMR); 352 I915_WRITE(_FDI_RXB_IMR, dev_priv->regfile.saveFDI_RXB_IMR); 353 I915_WRITE(PCH_PORT_HOTPLUG, dev_priv->regfile.savePCH_PORT_HOTPLUG); 354 I915_WRITE(RSTDBYCTL, 355 dev_priv->regfile.saveMCHBAR_RENDER_STANDBY); 356 } else { 357 I915_WRITE(IER, dev_priv->regfile.saveIER); 358 I915_WRITE(IMR, dev_priv->regfile.saveIMR); 359 } 360 } 361 362 /* Cache mode state */ 363 if (INTEL_INFO(dev)->gen < 7) 364 I915_WRITE(CACHE_MODE_0, dev_priv->regfile.saveCACHE_MODE_0 | 365 0xffff0000); 366 367 /* Memory arbitration state */ 368 I915_WRITE(MI_ARB_STATE, dev_priv->regfile.saveMI_ARB_STATE | 0xffff0000); 369 370 for (i = 0; i < 16; i++) { 371 I915_WRITE(SWF00 + (i << 2), dev_priv->regfile.saveSWF0[i]); 372 I915_WRITE(SWF10 + (i << 2), dev_priv->regfile.saveSWF1[i]); 373 } 374 for (i = 0; i < 3; i++) 375 I915_WRITE(SWF30 + (i << 2), dev_priv->regfile.saveSWF2[i]); 376 377 mutex_unlock(&dev->struct_mutex); 378 379 intel_i2c_reset(dev); 380 381 return 0; 382 } 383