drm/i915/i915_suspend.c

0001 /*
0002  *
0003  * Copyright 2008 (c) Intel Corporation
0004  *   Jesse Barnes <jbarnes@virtuousgeek.org>
0005  *
0006  * Permission is hereby granted, free of charge, to any person obtaining a
0007  * copy of this software and associated documentation files (the
0008  * "Software"), to deal in the Software without restriction, including
0009  * without limitation the rights to use, copy, modify, merge, publish,
0010  * distribute, sub license, and/or sell copies of the Software, and to
0011  * permit persons to whom the Software is furnished to do so, subject to
0012  * the following conditions:
0013  *
0014  * The above copyright notice and this permission notice (including the
0015  * next paragraph) shall be included in all copies or substantial portions
0016  * of the Software.
0017  *
0018  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
0019  * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
0020  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
0021  * IN NO EVENT SHALL TUNGSTEN GRAPHICS AND/OR ITS SUPPLIERS BE LIABLE FOR
0022  * ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
0023  * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
0024  * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
0025  */
0026
0027 #include "display/intel_de.h"
0028 #include "display/intel_gmbus.h"
0029 #include "display/intel_vga.h"
0030
0031 #include "i915_drv.h"
0032 #include "i915_reg.h"
0033 #include "i915_suspend.h"
0034 #include "intel_pci_config.h"
0035
0036 static void intel_save_swf(struct drm_i915_private *dev_priv)
0037 {
0038     int i;
0039
0040     /* Scratch space */
0041     if (GRAPHICS_VER(dev_priv) == 2 && IS_MOBILE(dev_priv)) {
0042         for (i = 0; i < 7; i++) {
0043             dev_priv->regfile.saveSWF0[i] = intel_de_read(dev_priv, SWF0(i));
0044             dev_priv->regfile.saveSWF1[i] = intel_de_read(dev_priv, SWF1(i));
0045         }
0046         for (i = 0; i < 3; i++)
0047             dev_priv->regfile.saveSWF3[i] = intel_de_read(dev_priv, SWF3(i));
0048     } else if (GRAPHICS_VER(dev_priv) == 2) {
0049         for (i = 0; i < 7; i++)
0050             dev_priv->regfile.saveSWF1[i] = intel_de_read(dev_priv, SWF1(i));
0051     } else if (HAS_GMCH(dev_priv)) {
0052         for (i = 0; i < 16; i++) {
0053             dev_priv->regfile.saveSWF0[i] = intel_de_read(dev_priv, SWF0(i));
0054             dev_priv->regfile.saveSWF1[i] = intel_de_read(dev_priv, SWF1(i));
0055         }
0056         for (i = 0; i < 3; i++)
0057             dev_priv->regfile.saveSWF3[i] = intel_de_read(dev_priv, SWF3(i));
0058     }
0059 }
0060
0061 static void intel_restore_swf(struct drm_i915_private *dev_priv)
0062 {
0063     int i;
0064
0065     /* Scratch space */
0066     if (GRAPHICS_VER(dev_priv) == 2 && IS_MOBILE(dev_priv)) {
0067         for (i = 0; i < 7; i++) {
0068             intel_de_write(dev_priv, SWF0(i), dev_priv->regfile.saveSWF0[i]);
0069             intel_de_write(dev_priv, SWF1(i), dev_priv->regfile.saveSWF1[i]);
0070         }
0071         for (i = 0; i < 3; i++)
0072             intel_de_write(dev_priv, SWF3(i), dev_priv->regfile.saveSWF3[i]);
0073     } else if (GRAPHICS_VER(dev_priv) == 2) {
0074         for (i = 0; i < 7; i++)
0075             intel_de_write(dev_priv, SWF1(i), dev_priv->regfile.saveSWF1[i]);
0076     } else if (HAS_GMCH(dev_priv)) {
0077         for (i = 0; i < 16; i++) {
0078             intel_de_write(dev_priv, SWF0(i), dev_priv->regfile.saveSWF0[i]);
0079             intel_de_write(dev_priv, SWF1(i), dev_priv->regfile.saveSWF1[i]);
0080         }
0081         for (i = 0; i < 3; i++)
0082             intel_de_write(dev_priv, SWF3(i), dev_priv->regfile.saveSWF3[i]);
0083     }
0084 }
0085
0086 void i915_save_display(struct drm_i915_private *dev_priv)
0087 {
0088     struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev);
0089
0090     if (!HAS_DISPLAY(dev_priv))
0091         return;
0092
0093     /* Display arbitration control */
0094     if (GRAPHICS_VER(dev_priv) <= 4)
0095         dev_priv->regfile.saveDSPARB = intel_de_read(dev_priv, DSPARB);
0096
0097     if (GRAPHICS_VER(dev_priv) == 4)
0098         pci_read_config_word(pdev, GCDGMBUS,
0099                      &dev_priv->regfile.saveGCDGMBUS);
0100
0101     intel_save_swf(dev_priv);
0102 }
0103
0104 void i915_restore_display(struct drm_i915_private *dev_priv)
0105 {
0106     struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev);
0107
0108     if (!HAS_DISPLAY(dev_priv))
0109         return;
0110
0111     intel_restore_swf(dev_priv);
0112
0113     if (GRAPHICS_VER(dev_priv) == 4)
0114         pci_write_config_word(pdev, GCDGMBUS,
0115                       dev_priv->regfile.saveGCDGMBUS);
0116
0117     /* Display arbitration */
0118     if (GRAPHICS_VER(dev_priv) <= 4)
0119         intel_de_write(dev_priv, DSPARB, dev_priv->regfile.saveDSPARB);
0120
0121     intel_vga_redisable(dev_priv);
0122
0123     intel_gmbus_reset(dev_priv);
0124 }