3 * Copyright 2008 (c) Intel Corporation
4 * Jesse Barnes <jbarnes@virtuousgeek.org>
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:
14 * The above copyright notice and this permission notice (including the
15 * next paragraph) shall be included in all copies or substantial portions
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.
27 #include <drm/i915_drm.h>
29 #include "display/intel_fbc.h"
30 #include "display/intel_gmbus.h"
34 #include "i915_suspend.h"
36 static void i915_save_display(struct drm_i915_private *dev_priv)
38 /* Display arbitration control */
39 if (INTEL_GEN(dev_priv) <= 4)
40 dev_priv->regfile.saveDSPARB = I915_READ(DSPARB);
42 /* save FBC interval */
43 if (HAS_FBC(dev_priv) && INTEL_GEN(dev_priv) <= 4 && !IS_G4X(dev_priv))
44 dev_priv->regfile.saveFBC_CONTROL = I915_READ(FBC_CONTROL);
47 static void i915_restore_display(struct drm_i915_private *dev_priv)
49 /* Display arbitration */
50 if (INTEL_GEN(dev_priv) <= 4)
51 I915_WRITE(DSPARB, dev_priv->regfile.saveDSPARB);
53 /* only restore FBC info on the platform that supports FBC*/
54 intel_fbc_global_disable(dev_priv);
56 /* restore FBC interval */
57 if (HAS_FBC(dev_priv) && INTEL_GEN(dev_priv) <= 4 && !IS_G4X(dev_priv))
58 I915_WRITE(FBC_CONTROL, dev_priv->regfile.saveFBC_CONTROL);
60 i915_redisable_vga(dev_priv);
63 int i915_save_state(struct drm_i915_private *dev_priv)
65 struct pci_dev *pdev = dev_priv->drm.pdev;
68 mutex_lock(&dev_priv->drm.struct_mutex);
70 i915_save_display(dev_priv);
72 if (IS_GEN(dev_priv, 4))
73 pci_read_config_word(pdev, GCDGMBUS,
74 &dev_priv->regfile.saveGCDGMBUS);
76 /* Cache mode state */
77 if (INTEL_GEN(dev_priv) < 7)
78 dev_priv->regfile.saveCACHE_MODE_0 = I915_READ(CACHE_MODE_0);
80 /* Memory Arbitration state */
81 dev_priv->regfile.saveMI_ARB_STATE = I915_READ(MI_ARB_STATE);
84 if (IS_GEN(dev_priv, 2) && IS_MOBILE(dev_priv)) {
85 for (i = 0; i < 7; i++) {
86 dev_priv->regfile.saveSWF0[i] = I915_READ(SWF0(i));
87 dev_priv->regfile.saveSWF1[i] = I915_READ(SWF1(i));
89 for (i = 0; i < 3; i++)
90 dev_priv->regfile.saveSWF3[i] = I915_READ(SWF3(i));
91 } else if (IS_GEN(dev_priv, 2)) {
92 for (i = 0; i < 7; i++)
93 dev_priv->regfile.saveSWF1[i] = I915_READ(SWF1(i));
94 } else if (HAS_GMCH(dev_priv)) {
95 for (i = 0; i < 16; i++) {
96 dev_priv->regfile.saveSWF0[i] = I915_READ(SWF0(i));
97 dev_priv->regfile.saveSWF1[i] = I915_READ(SWF1(i));
99 for (i = 0; i < 3; i++)
100 dev_priv->regfile.saveSWF3[i] = I915_READ(SWF3(i));
103 mutex_unlock(&dev_priv->drm.struct_mutex);
108 int i915_restore_state(struct drm_i915_private *dev_priv)
110 struct pci_dev *pdev = dev_priv->drm.pdev;
113 mutex_lock(&dev_priv->drm.struct_mutex);
115 if (IS_GEN(dev_priv, 4))
116 pci_write_config_word(pdev, GCDGMBUS,
117 dev_priv->regfile.saveGCDGMBUS);
118 i915_restore_display(dev_priv);
120 /* Cache mode state */
121 if (INTEL_GEN(dev_priv) < 7)
122 I915_WRITE(CACHE_MODE_0, dev_priv->regfile.saveCACHE_MODE_0 |
125 /* Memory arbitration state */
126 I915_WRITE(MI_ARB_STATE, dev_priv->regfile.saveMI_ARB_STATE | 0xffff0000);
129 if (IS_GEN(dev_priv, 2) && IS_MOBILE(dev_priv)) {
130 for (i = 0; i < 7; i++) {
131 I915_WRITE(SWF0(i), dev_priv->regfile.saveSWF0[i]);
132 I915_WRITE(SWF1(i), dev_priv->regfile.saveSWF1[i]);
134 for (i = 0; i < 3; i++)
135 I915_WRITE(SWF3(i), dev_priv->regfile.saveSWF3[i]);
136 } else if (IS_GEN(dev_priv, 2)) {
137 for (i = 0; i < 7; i++)
138 I915_WRITE(SWF1(i), dev_priv->regfile.saveSWF1[i]);
139 } else if (HAS_GMCH(dev_priv)) {
140 for (i = 0; i < 16; i++) {
141 I915_WRITE(SWF0(i), dev_priv->regfile.saveSWF0[i]);
142 I915_WRITE(SWF1(i), dev_priv->regfile.saveSWF1[i]);
144 for (i = 0; i < 3; i++)
145 I915_WRITE(SWF3(i), dev_priv->regfile.saveSWF3[i]);
148 mutex_unlock(&dev_priv->drm.struct_mutex);
150 intel_gmbus_reset(dev_priv);