exynos_drm_drv.c revision 52c68814cd7f3592292a02b890b5b8625e9069a7 
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>
7 *
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:
14 *
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.
18 *
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.
26 */
27
28#include "drmP.h"
29#include "drm.h"
30#include "drm_crtc_helper.h"
31
32#include <drm/exynos_drm.h>
33
34#include "exynos_drm_drv.h"
35#include "exynos_drm_crtc.h"
36#include "exynos_drm_fbdev.h"
37#include "exynos_drm_fb.h"
38#include "exynos_drm_gem.h"
39#include "exynos_drm_plane.h"
40
41#define DRIVER_NAME	"exynos"
42#define DRIVER_DESC	"Samsung SoC DRM"
43#define DRIVER_DATE	"20110530"
44#define DRIVER_MAJOR	1
45#define DRIVER_MINOR	0
46
47#define VBLANK_OFF_DELAY	50000
48
49static int exynos_drm_load(struct drm_device *dev, unsigned long flags)
50{
51	struct exynos_drm_private *private;
52	int ret;
53	int nr;
54
55	DRM_DEBUG_DRIVER("%s\n", __FILE__);
56
57	private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
58	if (!private) {
59		DRM_ERROR("failed to allocate private\n");
60		return -ENOMEM;
61	}
62
63	INIT_LIST_HEAD(&private->pageflip_event_list);
64	dev->dev_private = (void *)private;
65
66	drm_mode_config_init(dev);
67
68	/* init kms poll for handling hpd */
69	drm_kms_helper_poll_init(dev);
70
71	exynos_drm_mode_config_init(dev);
72
73	/*
74	 * EXYNOS4 is enough to have two CRTCs and each crtc would be used
75	 * without dependency of hardware.
76	 */
77	for (nr = 0; nr < MAX_CRTC; nr++) {
78		ret = exynos_drm_crtc_create(dev, nr);
79		if (ret)
80			goto err_crtc;
81	}
82
83	for (nr = 0; nr < MAX_PLANE; nr++) {
84		ret = exynos_plane_init(dev, nr);
85		if (ret)
86			goto err_crtc;
87	}
88
89	ret = drm_vblank_init(dev, MAX_CRTC);
90	if (ret)
91		goto err_crtc;
92
93	/*
94	 * probe sub drivers such as display controller and hdmi driver,
95	 * that were registered at probe() of platform driver
96	 * to the sub driver and create encoder and connector for them.
97	 */
98	ret = exynos_drm_device_register(dev);
99	if (ret)
100		goto err_vblank;
101
102	/*
103	 * create and configure fb helper and also exynos specific
104	 * fbdev object.
105	 */
106	ret = exynos_drm_fbdev_init(dev);
107	if (ret) {
108		DRM_ERROR("failed to initialize drm fbdev\n");
109		goto err_drm_device;
110	}
111
112	drm_vblank_offdelay = VBLANK_OFF_DELAY;
113
114	return 0;
115
116err_drm_device:
117	exynos_drm_device_unregister(dev);
118err_vblank:
119	drm_vblank_cleanup(dev);
120err_crtc:
121	drm_mode_config_cleanup(dev);
122	kfree(private);
123
124	return ret;
125}
126
127static int exynos_drm_unload(struct drm_device *dev)
128{
129	DRM_DEBUG_DRIVER("%s\n", __FILE__);
130
131	exynos_drm_fbdev_fini(dev);
132	exynos_drm_device_unregister(dev);
133	drm_vblank_cleanup(dev);
134	drm_kms_helper_poll_fini(dev);
135	drm_mode_config_cleanup(dev);
136	kfree(dev->dev_private);
137
138	dev->dev_private = NULL;
139
140	return 0;
141}
142
143static void exynos_drm_preclose(struct drm_device *dev,
144					struct drm_file *file_priv)
145{
146	struct exynos_drm_private *dev_priv = dev->dev_private;
147
148	/*
149	 * drm framework frees all events at release time,
150	 * so private event list should be cleared.
151	 */
152	if (!list_empty(&dev_priv->pageflip_event_list))
153		INIT_LIST_HEAD(&dev_priv->pageflip_event_list);
154}
155
156static void exynos_drm_lastclose(struct drm_device *dev)
157{
158	DRM_DEBUG_DRIVER("%s\n", __FILE__);
159
160	exynos_drm_fbdev_restore_mode(dev);
161}
162
163static struct vm_operations_struct exynos_drm_gem_vm_ops = {
164	.fault = exynos_drm_gem_fault,
165	.open = drm_gem_vm_open,
166	.close = drm_gem_vm_close,
167};
168
169static struct drm_ioctl_desc exynos_ioctls[] = {
170	DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
171			DRM_UNLOCKED | DRM_AUTH),
172	DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MAP_OFFSET,
173			exynos_drm_gem_map_offset_ioctl, DRM_UNLOCKED |
174			DRM_AUTH),
175	DRM_IOCTL_DEF_DRV(EXYNOS_GEM_MMAP,
176			exynos_drm_gem_mmap_ioctl, DRM_UNLOCKED | DRM_AUTH),
177	DRM_IOCTL_DEF_DRV(EXYNOS_PLANE_SET_ZPOS, exynos_plane_set_zpos_ioctl,
178			DRM_UNLOCKED | DRM_AUTH),
179};
180
181static const struct file_operations exynos_drm_driver_fops = {
182	.owner		= THIS_MODULE,
183	.open		= drm_open,
184	.mmap		= exynos_drm_gem_mmap,
185	.poll		= drm_poll,
186	.read		= drm_read,
187	.unlocked_ioctl	= drm_ioctl,
188	.release	= drm_release,
189};
190
191static struct drm_driver exynos_drm_driver = {
192	.driver_features	= DRIVER_HAVE_IRQ | DRIVER_BUS_PLATFORM |
193				  DRIVER_MODESET | DRIVER_GEM,
194	.load			= exynos_drm_load,
195	.unload			= exynos_drm_unload,
196	.preclose		= exynos_drm_preclose,
197	.lastclose		= exynos_drm_lastclose,
198	.get_vblank_counter	= drm_vblank_count,
199	.enable_vblank		= exynos_drm_crtc_enable_vblank,
200	.disable_vblank		= exynos_drm_crtc_disable_vblank,
201	.gem_init_object	= exynos_drm_gem_init_object,
202	.gem_free_object	= exynos_drm_gem_free_object,
203	.gem_vm_ops		= &exynos_drm_gem_vm_ops,
204	.dumb_create		= exynos_drm_gem_dumb_create,
205	.dumb_map_offset	= exynos_drm_gem_dumb_map_offset,
206	.dumb_destroy		= exynos_drm_gem_dumb_destroy,
207	.ioctls			= exynos_ioctls,
208	.fops			= &exynos_drm_driver_fops,
209	.name	= DRIVER_NAME,
210	.desc	= DRIVER_DESC,
211	.date	= DRIVER_DATE,
212	.major	= DRIVER_MAJOR,
213	.minor	= DRIVER_MINOR,
214};
215
216static int exynos_drm_platform_probe(struct platform_device *pdev)
217{
218	DRM_DEBUG_DRIVER("%s\n", __FILE__);
219
220	exynos_drm_driver.num_ioctls = DRM_ARRAY_SIZE(exynos_ioctls);
221
222	return drm_platform_init(&exynos_drm_driver, pdev);
223}
224
225static int exynos_drm_platform_remove(struct platform_device *pdev)
226{
227	DRM_DEBUG_DRIVER("%s\n", __FILE__);
228
229	drm_platform_exit(&exynos_drm_driver, pdev);
230
231	return 0;
232}
233
234static struct platform_driver exynos_drm_platform_driver = {
235	.probe		= exynos_drm_platform_probe,
236	.remove		= __devexit_p(exynos_drm_platform_remove),
237	.driver		= {
238		.owner	= THIS_MODULE,
239		.name	= DRIVER_NAME,
240	},
241};
242
243static int __init exynos_drm_init(void)
244{
245	DRM_DEBUG_DRIVER("%s\n", __FILE__);
246
247	return platform_driver_register(&exynos_drm_platform_driver);
248}
249
250static void __exit exynos_drm_exit(void)
251{
252	DRM_DEBUG_DRIVER("%s\n", __FILE__);
253
254	platform_driver_unregister(&exynos_drm_platform_driver);
255}
256
257module_init(exynos_drm_init);
258module_exit(exynos_drm_exit);
259
260MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
261MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
262MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
263MODULE_DESCRIPTION("Samsung SoC DRM Driver");
264MODULE_LICENSE("GPL");
265