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 void i915_save_display(struct drm_device *dev) 33 { 34 struct drm_i915_private *dev_priv = dev->dev_private; 35 36 /* Display arbitration control */ 37 if (INTEL_INFO(dev)->gen <= 4) 38 dev_priv->regfile.saveDSPARB = I915_READ(DSPARB); 39 40 /* LVDS state */ 41 if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev)) 42 dev_priv->regfile.saveLVDS = I915_READ(PCH_LVDS); 43 else if (INTEL_INFO(dev)->gen <= 4 && IS_MOBILE(dev) && !IS_I830(dev)) 44 dev_priv->regfile.saveLVDS = I915_READ(LVDS); 45 46 /* Panel power sequencer */ 47 if (HAS_PCH_SPLIT(dev)) { 48 dev_priv->regfile.savePP_CONTROL = I915_READ(PCH_PP_CONTROL); 49 dev_priv->regfile.savePP_ON_DELAYS = I915_READ(PCH_PP_ON_DELAYS); 50 dev_priv->regfile.savePP_OFF_DELAYS = I915_READ(PCH_PP_OFF_DELAYS); 51 dev_priv->regfile.savePP_DIVISOR = I915_READ(PCH_PP_DIVISOR); 52 } else if (INTEL_INFO(dev)->gen <= 4) { 53 dev_priv->regfile.savePP_CONTROL = I915_READ(PP_CONTROL); 54 dev_priv->regfile.savePP_ON_DELAYS = I915_READ(PP_ON_DELAYS); 55 dev_priv->regfile.savePP_OFF_DELAYS = I915_READ(PP_OFF_DELAYS); 56 dev_priv->regfile.savePP_DIVISOR = I915_READ(PP_DIVISOR); 57 } 58 59 /* save FBC interval */ 60 if (HAS_FBC(dev) && INTEL_INFO(dev)->gen <= 4 && !IS_G4X(dev)) 61 dev_priv->regfile.saveFBC_CONTROL = I915_READ(FBC_CONTROL); 62 } 63 64 static void i915_restore_display(struct drm_device *dev) 65 { 66 struct drm_i915_private *dev_priv = dev->dev_private; 67 u32 mask = 0xffffffff; 68 69 /* Display arbitration */ 70 if (INTEL_INFO(dev)->gen <= 4) 71 I915_WRITE(DSPARB, dev_priv->regfile.saveDSPARB); 72 73 mask = ~LVDS_PORT_EN; 74 75 /* LVDS state */ 76 if (HAS_PCH_IBX(dev) || HAS_PCH_CPT(dev)) 77 I915_WRITE(PCH_LVDS, dev_priv->regfile.saveLVDS & mask); 78 else if (INTEL_INFO(dev)->gen <= 4 && IS_MOBILE(dev) && !IS_I830(dev)) 79 I915_WRITE(LVDS, dev_priv->regfile.saveLVDS & mask); 80 81 /* Panel power sequencer */ 82 if (HAS_PCH_SPLIT(dev)) { 83 I915_WRITE(PCH_PP_ON_DELAYS, dev_priv->regfile.savePP_ON_DELAYS); 84 I915_WRITE(PCH_PP_OFF_DELAYS, dev_priv->regfile.savePP_OFF_DELAYS); 85 I915_WRITE(PCH_PP_DIVISOR, dev_priv->regfile.savePP_DIVISOR); 86 I915_WRITE(PCH_PP_CONTROL, dev_priv->regfile.savePP_CONTROL); 87 } else if (INTEL_INFO(dev)->gen <= 4) { 88 I915_WRITE(PP_ON_DELAYS, dev_priv->regfile.savePP_ON_DELAYS); 89 I915_WRITE(PP_OFF_DELAYS, dev_priv->regfile.savePP_OFF_DELAYS); 90 I915_WRITE(PP_DIVISOR, dev_priv->regfile.savePP_DIVISOR); 91 I915_WRITE(PP_CONTROL, dev_priv->regfile.savePP_CONTROL); 92 } 93 94 /* only restore FBC info on the platform that supports FBC*/ 95 intel_fbc_global_disable(dev_priv); 96 97 /* restore FBC interval */ 98 if (HAS_FBC(dev) && INTEL_INFO(dev)->gen <= 4 && !IS_G4X(dev)) 99 I915_WRITE(FBC_CONTROL, dev_priv->regfile.saveFBC_CONTROL); 100 101 i915_redisable_vga(dev); 102 } 103 104 int i915_save_state(struct drm_device *dev) 105 { 106 struct drm_i915_private *dev_priv = dev->dev_private; 107 int i; 108 109 mutex_lock(&dev->struct_mutex); 110 111 i915_save_display(dev); 112 113 if (IS_GEN4(dev)) 114 pci_read_config_word(dev->pdev, GCDGMBUS, 115 &dev_priv->regfile.saveGCDGMBUS); 116 117 /* Cache mode state */ 118 if (INTEL_INFO(dev)->gen < 7) 119 dev_priv->regfile.saveCACHE_MODE_0 = I915_READ(CACHE_MODE_0); 120 121 /* Memory Arbitration state */ 122 dev_priv->regfile.saveMI_ARB_STATE = I915_READ(MI_ARB_STATE); 123 124 /* Scratch space */ 125 if (IS_GEN2(dev_priv) && IS_MOBILE(dev_priv)) { 126 for (i = 0; i < 7; i++) { 127 dev_priv->regfile.saveSWF0[i] = I915_READ(SWF0(i)); 128 dev_priv->regfile.saveSWF1[i] = I915_READ(SWF1(i)); 129 } 130 for (i = 0; i < 3; i++) 131 dev_priv->regfile.saveSWF3[i] = I915_READ(SWF3(i)); 132 } else if (IS_GEN2(dev_priv)) { 133 for (i = 0; i < 7; i++) 134 dev_priv->regfile.saveSWF1[i] = I915_READ(SWF1(i)); 135 } else if (HAS_GMCH_DISPLAY(dev_priv)) { 136 for (i = 0; i < 16; i++) { 137 dev_priv->regfile.saveSWF0[i] = I915_READ(SWF0(i)); 138 dev_priv->regfile.saveSWF1[i] = I915_READ(SWF1(i)); 139 } 140 for (i = 0; i < 3; i++) 141 dev_priv->regfile.saveSWF3[i] = I915_READ(SWF3(i)); 142 } 143 144 mutex_unlock(&dev->struct_mutex); 145 146 return 0; 147 } 148 149 int i915_restore_state(struct drm_device *dev) 150 { 151 struct drm_i915_private *dev_priv = dev->dev_private; 152 int i; 153 154 mutex_lock(&dev->struct_mutex); 155 156 i915_gem_restore_fences(dev); 157 158 if (IS_GEN4(dev)) 159 pci_write_config_word(dev->pdev, GCDGMBUS, 160 dev_priv->regfile.saveGCDGMBUS); 161 i915_restore_display(dev); 162 163 /* Cache mode state */ 164 if (INTEL_INFO(dev)->gen < 7) 165 I915_WRITE(CACHE_MODE_0, dev_priv->regfile.saveCACHE_MODE_0 | 166 0xffff0000); 167 168 /* Memory arbitration state */ 169 I915_WRITE(MI_ARB_STATE, dev_priv->regfile.saveMI_ARB_STATE | 0xffff0000); 170 171 /* Scratch space */ 172 if (IS_GEN2(dev_priv) && IS_MOBILE(dev_priv)) { 173 for (i = 0; i < 7; i++) { 174 I915_WRITE(SWF0(i), dev_priv->regfile.saveSWF0[i]); 175 I915_WRITE(SWF1(i), dev_priv->regfile.saveSWF1[i]); 176 } 177 for (i = 0; i < 3; i++) 178 I915_WRITE(SWF3(i), dev_priv->regfile.saveSWF3[i]); 179 } else if (IS_GEN2(dev_priv)) { 180 for (i = 0; i < 7; i++) 181 I915_WRITE(SWF1(i), dev_priv->regfile.saveSWF1[i]); 182 } else if (HAS_GMCH_DISPLAY(dev_priv)) { 183 for (i = 0; i < 16; i++) { 184 I915_WRITE(SWF0(i), dev_priv->regfile.saveSWF0[i]); 185 I915_WRITE(SWF1(i), dev_priv->regfile.saveSWF1[i]); 186 } 187 for (i = 0; i < 3; i++) 188 I915_WRITE(SWF3(i), dev_priv->regfile.saveSWF3[i]); 189 } 190 191 mutex_unlock(&dev->struct_mutex); 192 193 intel_i2c_reset(dev); 194 195 return 0; 196 } 197