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 <drm/drmP.h>
  28 #include <drm/i915_drm.h>
  29 #include "intel_drv.h"
  30 #include "i915_reg.h"
  31
  32 static void i915_save_display(struct drm_device *dev)
  33 {
  34         struct drm_i915_private *dev_priv = to_i915(dev);
  35
  36         /* Display arbitration control */
  37         if (INTEL_INFO(dev)->gen <= 4)
  38                 dev_priv->regfile.saveDSPARB = I915_READ(DSPARB);
  39
  40         /* save FBC interval */
  41         if (HAS_FBC(dev) && INTEL_INFO(dev)->gen <= 4 && !IS_G4X(dev))
  42                 dev_priv->regfile.saveFBC_CONTROL = I915_READ(FBC_CONTROL);
  43 }
  44
  45 static void i915_restore_display(struct drm_device *dev)
  46 {
  47         struct drm_i915_private *dev_priv = to_i915(dev);
  48
  49         /* Display arbitration */
  50         if (INTEL_INFO(dev)->gen <= 4)
  51                 I915_WRITE(DSPARB, dev_priv->regfile.saveDSPARB);
  52
  53         /* only restore FBC info on the platform that supports FBC*/
  54         intel_fbc_global_disable(dev_priv);
  55
  56         /* restore FBC interval */
  57         if (HAS_FBC(dev) && INTEL_INFO(dev)->gen <= 4 && !IS_G4X(dev))
  58                 I915_WRITE(FBC_CONTROL, dev_priv->regfile.saveFBC_CONTROL);
  59
  60         i915_redisable_vga(dev);
  61 }
  62
  63 int i915_save_state(struct drm_device *dev)
  64 {
  65         struct drm_i915_private *dev_priv = to_i915(dev);
  66         struct pci_dev *pdev = dev_priv->drm.pdev;
  67         int i;
  68
  69         mutex_lock(&dev->struct_mutex);
  70
  71         i915_save_display(dev);
  72
  73         if (IS_GEN4(dev))
  74                 pci_read_config_word(pdev, GCDGMBUS,
  75                                      &dev_priv->regfile.saveGCDGMBUS);
  76
  77         /* Cache mode state */
  78         if (INTEL_INFO(dev)->gen < 7)
  79                 dev_priv->regfile.saveCACHE_MODE_0 = I915_READ(CACHE_MODE_0);
  80
  81         /* Memory Arbitration state */
  82         dev_priv->regfile.saveMI_ARB_STATE = I915_READ(MI_ARB_STATE);
  83
  84         /* Scratch space */
  85         if (IS_GEN2(dev_priv) && IS_MOBILE(dev_priv)) {
  86                 for (i = 0; i < 7; i++) {
  87                         dev_priv->regfile.saveSWF0[i] = I915_READ(SWF0(i));
  88                         dev_priv->regfile.saveSWF1[i] = I915_READ(SWF1(i));
  89                 }
  90                 for (i = 0; i < 3; i++)
  91                         dev_priv->regfile.saveSWF3[i] = I915_READ(SWF3(i));
  92         } else if (IS_GEN2(dev_priv)) {
  93                 for (i = 0; i < 7; i++)
  94                         dev_priv->regfile.saveSWF1[i] = I915_READ(SWF1(i));
  95         } else if (HAS_GMCH_DISPLAY(dev_priv)) {
  96                 for (i = 0; i < 16; i++) {
  97                         dev_priv->regfile.saveSWF0[i] = I915_READ(SWF0(i));
  98                         dev_priv->regfile.saveSWF1[i] = I915_READ(SWF1(i));
  99                 }
 100                 for (i = 0; i < 3; i++)
 101                         dev_priv->regfile.saveSWF3[i] = I915_READ(SWF3(i));
 102         }
 103
 104         mutex_unlock(&dev->struct_mutex);
 105
 106         return 0;
 107 }
 108
 109 int i915_restore_state(struct drm_device *dev)
 110 {
 111         struct drm_i915_private *dev_priv = to_i915(dev);
 112         struct pci_dev *pdev = dev_priv->drm.pdev;
 113         int i;
 114
 115         mutex_lock(&dev->struct_mutex);
 116
 117         i915_gem_restore_fences(dev);
 118
 119         if (IS_GEN4(dev))
 120                 pci_write_config_word(pdev, GCDGMBUS,
 121                                       dev_priv->regfile.saveGCDGMBUS);
 122         i915_restore_display(dev);
 123
 124         /* Cache mode state */
 125         if (INTEL_INFO(dev)->gen < 7)
 126                 I915_WRITE(CACHE_MODE_0, dev_priv->regfile.saveCACHE_MODE_0 |
 127                            0xffff0000);
 128
 129         /* Memory arbitration state */
 130         I915_WRITE(MI_ARB_STATE, dev_priv->regfile.saveMI_ARB_STATE | 0xffff0000);
 131
 132         /* Scratch space */
 133         if (IS_GEN2(dev_priv) && IS_MOBILE(dev_priv)) {
 134                 for (i = 0; i < 7; i++) {
 135                         I915_WRITE(SWF0(i), dev_priv->regfile.saveSWF0[i]);
 136                         I915_WRITE(SWF1(i), dev_priv->regfile.saveSWF1[i]);
 137                 }
 138                 for (i = 0; i < 3; i++)
 139                         I915_WRITE(SWF3(i), dev_priv->regfile.saveSWF3[i]);
 140         } else if (IS_GEN2(dev_priv)) {
 141                 for (i = 0; i < 7; i++)
 142                         I915_WRITE(SWF1(i), dev_priv->regfile.saveSWF1[i]);
 143         } else if (HAS_GMCH_DISPLAY(dev_priv)) {
 144                 for (i = 0; i < 16; i++) {
 145                         I915_WRITE(SWF0(i), dev_priv->regfile.saveSWF0[i]);
 146                         I915_WRITE(SWF1(i), dev_priv->regfile.saveSWF1[i]);
 147                 }
 148                 for (i = 0; i < 3; i++)
 149                         I915_WRITE(SWF3(i), dev_priv->regfile.saveSWF3[i]);
 150         }
 151
 152         mutex_unlock(&dev->struct_mutex);
 153
 154         intel_i2c_reset(dev);
 155
 156         return 0;
 157 }