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, SWF0(i)); 44 dev_priv->regfile.saveSWF1[i] = intel_de_read(dev_priv, SWF1(i)); 45 } 46 for (i = 0; i < 3; i++) 47 dev_priv->regfile.saveSWF3[i] = intel_de_read(dev_priv, SWF3(i)); 48 } else if (GRAPHICS_VER(dev_priv) == 2) { 49 for (i = 0; i < 7; i++) 50 dev_priv->regfile.saveSWF1[i] = intel_de_read(dev_priv, SWF1(i)); 51 } else if (HAS_GMCH(dev_priv)) { 52 for (i = 0; i < 16; i++) { 53 dev_priv->regfile.saveSWF0[i] = intel_de_read(dev_priv, SWF0(i)); 54 dev_priv->regfile.saveSWF1[i] = intel_de_read(dev_priv, SWF1(i)); 55 } 56 for (i = 0; i < 3; i++) 57 dev_priv->regfile.saveSWF3[i] = intel_de_read(dev_priv, SWF3(i)); 58 } 59 } 60 61 static void intel_restore_swf(struct drm_i915_private *dev_priv) 62 { 63 int i; 64 65 /* Scratch space */ 66 if (GRAPHICS_VER(dev_priv) == 2 && IS_MOBILE(dev_priv)) { 67 for (i = 0; i < 7; i++) { 68 intel_de_write(dev_priv, SWF0(i), dev_priv->regfile.saveSWF0[i]); 69 intel_de_write(dev_priv, SWF1(i), dev_priv->regfile.saveSWF1[i]); 70 } 71 for (i = 0; i < 3; i++) 72 intel_de_write(dev_priv, SWF3(i), dev_priv->regfile.saveSWF3[i]); 73 } else if (GRAPHICS_VER(dev_priv) == 2) { 74 for (i = 0; i < 7; i++) 75 intel_de_write(dev_priv, SWF1(i), dev_priv->regfile.saveSWF1[i]); 76 } else if (HAS_GMCH(dev_priv)) { 77 for (i = 0; i < 16; i++) { 78 intel_de_write(dev_priv, SWF0(i), dev_priv->regfile.saveSWF0[i]); 79 intel_de_write(dev_priv, SWF1(i), dev_priv->regfile.saveSWF1[i]); 80 } 81 for (i = 0; i < 3; i++) 82 intel_de_write(dev_priv, SWF3(i), dev_priv->regfile.saveSWF3[i]); 83 } 84 } 85 86 void i915_save_display(struct drm_i915_private *dev_priv) 87 { 88 struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev); 89 90 if (!HAS_DISPLAY(dev_priv)) 91 return; 92 93 /* Display arbitration control */ 94 if (GRAPHICS_VER(dev_priv) <= 4) 95 dev_priv->regfile.saveDSPARB = intel_de_read(dev_priv, DSPARB); 96 97 if (GRAPHICS_VER(dev_priv) == 4) 98 pci_read_config_word(pdev, GCDGMBUS, 99 &dev_priv->regfile.saveGCDGMBUS); 100 101 intel_save_swf(dev_priv); 102 } 103 104 void i915_restore_display(struct drm_i915_private *dev_priv) 105 { 106 struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev); 107 108 if (!HAS_DISPLAY(dev_priv)) 109 return; 110 111 intel_restore_swf(dev_priv); 112 113 if (GRAPHICS_VER(dev_priv) == 4) 114 pci_write_config_word(pdev, GCDGMBUS, 115 dev_priv->regfile.saveGCDGMBUS); 116 117 /* Display arbitration */ 118 if (GRAPHICS_VER(dev_priv) <= 4) 119 intel_de_write(dev_priv, DSPARB, dev_priv->regfile.saveDSPARB); 120 121 intel_vga_redisable(dev_priv); 122 123 intel_gmbus_reset(dev_priv); 124 } 125