tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright 2012 Red Hat Inc.
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the
6 * "Software"), to deal in the Software without restriction, including
7 * without limitation the rights to use, copy, modify, merge, publish,
8 * distribute, sub license, and/or sell copies of the Software, and to
9 * permit persons to whom the Software is furnished to do so, subject to
10 * the following conditions:
11 *
12 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
13 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
14 * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
15 * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
16 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
17 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
18 * USE OR OTHER DEALINGS IN THE SOFTWARE.
19 *
20 * The above copyright notice and this permission notice (including the
21 * next paragraph) shall be included in all copies or substantial portions
22 * of the Software.
23 *
24 */
25/*
26 * Authors: Dave Airlie <airlied@redhat.com>
27 */
28
29#include <linux/module.h>
30#include <linux/pci.h>
31
32#include <drm/drm_aperture.h>
33#include <drm/drm_atomic_helper.h>
34#include <drm/drm_drv.h>
35#include <drm/drm_fbdev_generic.h>
36#include <drm/drm_gem_shmem_helper.h>
37#include <drm/drm_module.h>
38#include <drm/drm_probe_helper.h>
39
40#include "ast_drv.h"
41
42static int ast_modeset = -1;
43
44MODULE_PARM_DESC(modeset, "Disable/Enable modesetting");
45module_param_named(modeset, ast_modeset, int, 0400);
46
47/*
48 * DRM driver
49 */
50
51DEFINE_DRM_GEM_FOPS(ast_fops);
52
53static const struct drm_driver ast_driver = {
54 .driver_features = DRIVER_ATOMIC |
55 DRIVER_GEM |
56 DRIVER_MODESET,
57
58 .fops = &ast_fops,
59 .name = DRIVER_NAME,
60 .desc = DRIVER_DESC,
61 .date = DRIVER_DATE,
62 .major = DRIVER_MAJOR,
63 .minor = DRIVER_MINOR,
64 .patchlevel = DRIVER_PATCHLEVEL,
65
66 DRM_GEM_SHMEM_DRIVER_OPS
67};
68
69/*
70 * PCI driver
71 */
72
73#define PCI_VENDOR_ASPEED 0x1a03
74
75#define AST_VGA_DEVICE(id, info) { \
76 .class = PCI_BASE_CLASS_DISPLAY << 16, \
77 .class_mask = 0xff0000, \
78 .vendor = PCI_VENDOR_ASPEED, \
79 .device = id, \
80 .subvendor = PCI_ANY_ID, \
81 .subdevice = PCI_ANY_ID, \
82 .driver_data = (unsigned long) info }
83
84static const struct pci_device_id ast_pciidlist[] = {
85 AST_VGA_DEVICE(PCI_CHIP_AST2000, NULL),
86 AST_VGA_DEVICE(PCI_CHIP_AST2100, NULL),
87 {0, 0, 0},
88};
89
90MODULE_DEVICE_TABLE(pci, ast_pciidlist);
91
92static int ast_pci_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
93{
94 struct ast_device *ast;
95 struct drm_device *dev;
96 int ret;
97
98 ret = drm_aperture_remove_conflicting_pci_framebuffers(pdev, &ast_driver);
99 if (ret)
100 return ret;
101
102 ret = pcim_enable_device(pdev);
103 if (ret)
104 return ret;
105
106 ast = ast_device_create(&ast_driver, pdev, ent->driver_data);
107 if (IS_ERR(ast))
108 return PTR_ERR(ast);
109 dev = &ast->base;
110
111 ret = drm_dev_register(dev, ent->driver_data);
112 if (ret)
113 return ret;
114
115 drm_fbdev_generic_setup(dev, 32);
116
117 return 0;
118}
119
120static void ast_pci_remove(struct pci_dev *pdev)
121{
122 struct drm_device *dev = pci_get_drvdata(pdev);
123
124 drm_dev_unregister(dev);
125 drm_atomic_helper_shutdown(dev);
126}
127
128static int ast_drm_freeze(struct drm_device *dev)
129{
130 int error;
131
132 error = drm_mode_config_helper_suspend(dev);
133 if (error)
134 return error;
135 pci_save_state(to_pci_dev(dev->dev));
136 return 0;
137}
138
139static int ast_drm_thaw(struct drm_device *dev)
140{
141 ast_post_gpu(dev);
142
143 return drm_mode_config_helper_resume(dev);
144}
145
146static int ast_drm_resume(struct drm_device *dev)
147{
148 if (pci_enable_device(to_pci_dev(dev->dev)))
149 return -EIO;
150
151 return ast_drm_thaw(dev);
152}
153
154static int ast_pm_suspend(struct device *dev)
155{
156 struct pci_dev *pdev = to_pci_dev(dev);
157 struct drm_device *ddev = pci_get_drvdata(pdev);
158 int error;
159
160 error = ast_drm_freeze(ddev);
161 if (error)
162 return error;
163
164 pci_disable_device(pdev);
165 pci_set_power_state(pdev, PCI_D3hot);
166 return 0;
167}
168
169static int ast_pm_resume(struct device *dev)
170{
171 struct pci_dev *pdev = to_pci_dev(dev);
172 struct drm_device *ddev = pci_get_drvdata(pdev);
173 return ast_drm_resume(ddev);
174}
175
176static int ast_pm_freeze(struct device *dev)
177{
178 struct pci_dev *pdev = to_pci_dev(dev);
179 struct drm_device *ddev = pci_get_drvdata(pdev);
180 return ast_drm_freeze(ddev);
181}
182
183static int ast_pm_thaw(struct device *dev)
184{
185 struct pci_dev *pdev = to_pci_dev(dev);
186 struct drm_device *ddev = pci_get_drvdata(pdev);
187 return ast_drm_thaw(ddev);
188}
189
190static int ast_pm_poweroff(struct device *dev)
191{
192 struct pci_dev *pdev = to_pci_dev(dev);
193 struct drm_device *ddev = pci_get_drvdata(pdev);
194
195 return ast_drm_freeze(ddev);
196}
197
198static const struct dev_pm_ops ast_pm_ops = {
199 .suspend = ast_pm_suspend,
200 .resume = ast_pm_resume,
201 .freeze = ast_pm_freeze,
202 .thaw = ast_pm_thaw,
203 .poweroff = ast_pm_poweroff,
204 .restore = ast_pm_resume,
205};
206
207static struct pci_driver ast_pci_driver = {
208 .name = DRIVER_NAME,
209 .id_table = ast_pciidlist,
210 .probe = ast_pci_probe,
211 .remove = ast_pci_remove,
212 .driver.pm = &ast_pm_ops,
213};
214
215drm_module_pci_driver_if_modeset(ast_pci_driver, ast_modeset);
216
217MODULE_AUTHOR(DRIVER_AUTHOR);
218MODULE_DESCRIPTION(DRIVER_DESC);
219MODULE_LICENSE("GPL and additional rights");