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