drivers/gpu/drm/i915/i915_suspend.c

   1 /*
   2  *
   3  * Copyright 2008 (c) Intel Corporation
   4  *   Jesse Barnes <[email protected]>
   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 intel_display *display = &dev_priv->display;
 122         struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev);
 123
 124         if (!HAS_DISPLAY(dev_priv))
 125                 return;
 126
 127         intel_restore_swf(dev_priv);
 128
 129         if (GRAPHICS_VER(dev_priv) == 4)
 130                 pci_write_config_word(pdev, GCDGMBUS,
 131                                       dev_priv->regfile.saveGCDGMBUS);
 132
 133         /* Display arbitration */
 134         if (GRAPHICS_VER(dev_priv) <= 4)
 135                 intel_de_write(dev_priv, DSPARB(dev_priv),
 136                                dev_priv->regfile.saveDSPARB);
 137
 138         intel_vga_redisable(display);
 139
 140         intel_gmbus_reset(display);
 141 }