drivers/gpu/drm/i915/i915_suspend.c

   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 }