[S390] Remove error checking from copy_oldmem_page()
[linux/fpc-iii.git] / drivers / gpu / drm / exynos / exynos_drm_drv.c
blob83810cbe3c1770aeea62814dfdd98c2e1b33df2e
1 /*
2 * Copyright (c) 2011 Samsung Electronics Co., Ltd.
3 * Authors:
4 * Inki Dae <inki.dae@samsung.com>
5 * Joonyoung Shim <jy0922.shim@samsung.com>
6 * Seung-Woo Kim <sw0312.kim@samsung.com>
8 * Permission is hereby granted, free of charge, to any person obtaining a
9 * copy of this software and associated documentation files (the "Software"),
10 * to deal in the Software without restriction, including without limitation
11 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
12 * and/or sell copies of the Software, and to permit persons to whom the
13 * Software is furnished to do so, subject to the following conditions:
15 * The above copyright notice and this permission notice (including the next
16 * paragraph) shall be included in all copies or substantial portions of the
17 * Software.
19 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
20 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
21 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
22 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
23 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
24 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
25 * OTHER DEALINGS IN THE SOFTWARE.
28 #include "drmP.h"
29 #include "drm.h"
31 #include <drm/exynos_drm.h>
33 #include "exynos_drm_drv.h"
34 #include "exynos_drm_crtc.h"
35 #include "exynos_drm_fbdev.h"
36 #include "exynos_drm_fb.h"
37 #include "exynos_drm_gem.h"
39 #define DRIVER_NAME "exynos-drm"
40 #define DRIVER_DESC "Samsung SoC DRM"
41 #define DRIVER_DATE "20110530"
42 #define DRIVER_MAJOR 1
43 #define DRIVER_MINOR 0
45 static int exynos_drm_load(struct drm_device *dev, unsigned long flags)
47 struct exynos_drm_private *private;
48 int ret;
49 int nr;
51 DRM_DEBUG_DRIVER("%s\n", __FILE__);
53 private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
54 if (!private) {
55 DRM_ERROR("failed to allocate private\n");
56 return -ENOMEM;
59 INIT_LIST_HEAD(&private->pageflip_event_list);
60 dev->dev_private = (void *)private;
62 drm_mode_config_init(dev);
64 exynos_drm_mode_config_init(dev);
67 * EXYNOS4 is enough to have two CRTCs and each crtc would be used
68 * without dependency of hardware.
70 for (nr = 0; nr < MAX_CRTC; nr++) {
71 ret = exynos_drm_crtc_create(dev, nr);
72 if (ret)
73 goto err_crtc;
76 ret = drm_vblank_init(dev, MAX_CRTC);
77 if (ret)
78 goto err_crtc;
81 * probe sub drivers such as display controller and hdmi driver,
82 * that were registered at probe() of platform driver
83 * to the sub driver and create encoder and connector for them.
85 ret = exynos_drm_device_register(dev);
86 if (ret)
87 goto err_vblank;
90 * create and configure fb helper and also exynos specific
91 * fbdev object.
93 ret = exynos_drm_fbdev_init(dev);
94 if (ret) {
95 DRM_ERROR("failed to initialize drm fbdev\n");
96 goto err_drm_device;
99 return 0;
101 err_drm_device:
102 exynos_drm_device_unregister(dev);
103 err_vblank:
104 drm_vblank_cleanup(dev);
105 err_crtc:
106 drm_mode_config_cleanup(dev);
107 kfree(private);
109 return ret;
112 static int exynos_drm_unload(struct drm_device *dev)
114 DRM_DEBUG_DRIVER("%s\n", __FILE__);
116 exynos_drm_fbdev_fini(dev);
117 exynos_drm_device_unregister(dev);
118 drm_vblank_cleanup(dev);
119 drm_mode_config_cleanup(dev);
120 kfree(dev->dev_private);
122 dev->dev_private = NULL;
124 return 0;
127 static void exynos_drm_preclose(struct drm_device *dev,
128 struct drm_file *file_priv)
130 struct exynos_drm_private *dev_priv = dev->dev_private;
133 * drm framework frees all events at release time,
134 * so private event list should be cleared.
136 if (!list_empty(&dev_priv->pageflip_event_list))
137 INIT_LIST_HEAD(&dev_priv->pageflip_event_list);
140 static void exynos_drm_lastclose(struct drm_device *dev)
142 DRM_DEBUG_DRIVER("%s\n", __FILE__);
144 exynos_drm_fbdev_restore_mode(dev);
147 static struct vm_operations_struct exynos_drm_gem_vm_ops = {
148 .fault = exynos_drm_gem_fault,
149 .open = drm_gem_vm_open,
150 .close = drm_gem_vm_close,
153 static struct drm_ioctl_desc exynos_ioctls[] = {
154 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
155 DRM_UNLOCKED | DRM_AUTH),
156 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP_OFFSET,
157 exynos_drm_gem_map_offset_ioctl, DRM_UNLOCKED |
158 DRM_AUTH),
159 DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MMAP,
160 exynos_drm_gem_mmap_ioctl, DRM_UNLOCKED | DRM_AUTH),
163 static struct drm_driver exynos_drm_driver = {
164 .driver_features = DRIVER_HAVE_IRQ | DRIVER_BUS_PLATFORM |
165 DRIVER_MODESET | DRIVER_GEM,
166 .load = exynos_drm_load,
167 .unload = exynos_drm_unload,
168 .preclose = exynos_drm_preclose,
169 .lastclose = exynos_drm_lastclose,
170 .get_vblank_counter = drm_vblank_count,
171 .enable_vblank = exynos_drm_crtc_enable_vblank,
172 .disable_vblank = exynos_drm_crtc_disable_vblank,
173 .gem_init_object = exynos_drm_gem_init_object,
174 .gem_free_object = exynos_drm_gem_free_object,
175 .gem_vm_ops = &exynos_drm_gem_vm_ops,
176 .dumb_create = exynos_drm_gem_dumb_create,
177 .dumb_map_offset = exynos_drm_gem_dumb_map_offset,
178 .dumb_destroy = exynos_drm_gem_dumb_destroy,
179 .ioctls = exynos_ioctls,
180 .fops = {
181 .owner = THIS_MODULE,
182 .open = drm_open,
183 .mmap = exynos_drm_gem_mmap,
184 .poll = drm_poll,
185 .read = drm_read,
186 .unlocked_ioctl = drm_ioctl,
187 .release = drm_release,
189 .name = DRIVER_NAME,
190 .desc = DRIVER_DESC,
191 .date = DRIVER_DATE,
192 .major = DRIVER_MAJOR,
193 .minor = DRIVER_MINOR,
196 static int exynos_drm_platform_probe(struct platform_device *pdev)
198 DRM_DEBUG_DRIVER("%s\n", __FILE__);
200 exynos_drm_driver.num_ioctls = DRM_ARRAY_SIZE(exynos_ioctls);
202 return drm_platform_init(&exynos_drm_driver, pdev);
205 static int exynos_drm_platform_remove(struct platform_device *pdev)
207 DRM_DEBUG_DRIVER("%s\n", __FILE__);
209 drm_platform_exit(&exynos_drm_driver, pdev);
211 return 0;
214 static struct platform_driver exynos_drm_platform_driver = {
215 .probe = exynos_drm_platform_probe,
216 .remove = __devexit_p(exynos_drm_platform_remove),
217 .driver = {
218 .owner = THIS_MODULE,
219 .name = DRIVER_NAME,
223 static int __init exynos_drm_init(void)
225 DRM_DEBUG_DRIVER("%s\n", __FILE__);
227 return platform_driver_register(&exynos_drm_platform_driver);
230 static void __exit exynos_drm_exit(void)
232 DRM_DEBUG_DRIVER("%s\n", __FILE__);
234 platform_driver_unregister(&exynos_drm_platform_driver);
237 module_init(exynos_drm_init);
238 module_exit(exynos_drm_exit);
240 MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
241 MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
242 MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
243 MODULE_DESCRIPTION("Samsung SoC DRM Driver");
244 MODULE_LICENSE("GPL");