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_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
intel_save_swf(struct drm_i915_private * dev_priv)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
intel_restore_swf(struct drm_i915_private * dev_priv)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
i915_save_display(struct drm_i915_private * dev_priv)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
i915_restore_display(struct drm_i915_private * dev_priv)119 void i915_restore_display(struct drm_i915_private *dev_priv)
120 {
121 struct pci_dev *pdev = to_pci_dev(dev_priv->drm.dev);
122
123 if (!HAS_DISPLAY(dev_priv))
124 return;
125
126 intel_restore_swf(dev_priv);
127
128 if (GRAPHICS_VER(dev_priv) == 4)
129 pci_write_config_word(pdev, GCDGMBUS,
130 dev_priv->regfile.saveGCDGMBUS);
131
132 /* Display arbitration */
133 if (GRAPHICS_VER(dev_priv) <= 4)
134 intel_de_write(dev_priv, DSPARB(dev_priv),
135 dev_priv->regfile.saveDSPARB);
136
137 intel_vga_redisable(dev_priv);
138
139 intel_gmbus_reset(dev_priv);
140 }
141