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 "display/intel_de.h" 28 #include "display/intel_gmbus.h" 29 #include "display/intel_vga.h" 30 31 #include "i915_drv.h" 32 #include "i915_reg.h" 33 #include "i915_suspend.h" 34 #include "intel_pci_config.h" 35 36 static void intel_save_swf(struct drm_i915_private *dev_priv) 37 { 38 int i; 39 40 /* Scratch space */ 41 if (GRAPHICS_VER(dev_priv) == 2 && IS_MOBILE(dev_priv)) { 42 for (i = 0; i < 7; i++) { 43 dev_priv->regfile.saveSWF0[i] = intel_de_read(dev_priv, 44 SWF0(dev_priv, i)); 45 dev_priv->regfile.saveSWF1[i] = intel_de_read(dev_priv, 46 SWF1(dev_priv, i)); 47 } 48 for (i = 0; i < 3; i++) 49 dev_priv->regfile.saveSWF3[i] = intel_de_read(dev_priv, 50 SWF3(dev_priv, i)); 51 } else if (GRAPHICS_VER(dev_priv) == 2) { 52 for (i = 0; i < 7; i++) 53 dev_priv->regfile.saveSWF1[i] = intel_de_read(dev_priv, 54 SWF1(dev_priv, i)); 55 } else if (HAS_GMCH(dev_priv)) { 56 for (i = 0; i < 16; i++) { 57 dev_priv->regfile.saveSWF0[i] = intel_de_read(dev_priv, 58 SWF0(dev_priv, i)); 59 dev_priv->regfile.saveSWF1[i] = intel_de_read(dev_priv, 60 SWF1(dev_priv, i)); 61 } 62 for (i = 0; i < 3; i++) 63 dev_priv->regfile.saveSWF3[i] = intel_de_read(dev_priv, 64 SWF3(dev_priv, i)); 65 } 66 } 67 68 static void intel_restore_swf(struct drm_i915_private *dev_priv) 69 { 70 int i; 71 72 /* Scratch space */ 73 if (GRAPHICS_VER(dev_priv) == 2 && IS_MOBILE(dev_priv)) { 74 for (i = 0; i < 7; i++) { 75 intel_de_write(dev_priv, SWF0(dev_priv, i), 76 dev_priv->regfile.saveSWF0[i]); 77 intel_de_write(dev_priv, SWF1(dev_priv, i), 78 dev_priv->regfile.saveSWF1[i]); 79 } 80 for (i = 0; i < 3; i++) 81 intel_de_write(dev_priv, SWF3(dev_priv, i), 82 dev_priv->regfile.saveSWF3[i]); 83 } else if (GRAPHICS_VER(dev_priv) == 2) { 84 for (i = 0; i < 7; i++) 85 intel_de_write(dev_priv, SWF1(dev_priv, i), 86 dev_priv->regfile.saveSWF1[i]); 87 } else if (HAS_GMCH(dev_priv)) { 88 for (i = 0; i < 16; i++) { 89 intel_de_write(dev_priv, SWF0(dev_priv, i), 90 dev_priv->regfile.saveSWF0[i]); 91 intel_de_write(dev_priv, SWF1(dev_priv, i), 92 dev_priv->regfile.saveSWF1[i]); 93 } 94 for (i = 0; i < 3; i++) 95 intel_de_write(dev_priv, SWF3(dev_priv, i), 96 dev_priv->regfile.saveSWF3[i]); 97 } 98 } 99 100 void i915_save_display(struct drm_i915_private *dev_priv) 101 { 102 struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev); 103 104 if (!HAS_DISPLAY(dev_priv)) 105 return; 106 107 /* Display arbitration control */ 108 if (GRAPHICS_VER(dev_priv) <= 4) 109 dev_priv->regfile.saveDSPARB = intel_de_read(dev_priv, 110 DSPARB(dev_priv)); 111 112 if (GRAPHICS_VER(dev_priv) == 4) 113 pci_read_config_word(pdev, GCDGMBUS, 114 &dev_priv->regfile.saveGCDGMBUS); 115 116 intel_save_swf(dev_priv); 117 } 118 119 void i915_restore_display(struct drm_i915_private *dev_priv) 120 { 121 struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev); 122 123 if (!HAS_DISPLAY(dev_priv)) 124 return; 125 126 intel_restore_swf(dev_priv); 127 128 if (GRAPHICS_VER(dev_priv) == 4) 129 pci_write_config_word(pdev, GCDGMBUS, 130 dev_priv->regfile.saveGCDGMBUS); 131 132 /* Display arbitration */ 133 if (GRAPHICS_VER(dev_priv) <= 4) 134 intel_de_write(dev_priv, DSPARB(dev_priv), 135 dev_priv->regfile.saveDSPARB); 136 137 intel_vga_redisable(dev_priv); 138 139 intel_gmbus_reset(dev_priv); 140 } 141