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 * This program is free software; you can redistribute  it and/or modify it
9 * under  the terms of  the GNU General  Public License as published by the
10 * Free Software Foundation;  either version 2 of the  License, or (at your
11 * option) any later version.
12 */
13
14#include <linux/pm_runtime.h>
15#include <drm/drmP.h>
16#include <drm/drm_crtc_helper.h>
17
18#include <linux/component.h>
19
20#include <drm/exynos_drm.h>
21
22#include "exynos_drm_drv.h"
23#include "exynos_drm_crtc.h"
24#include "exynos_drm_encoder.h"
25#include "exynos_drm_fbdev.h"
26#include "exynos_drm_fb.h"
27#include "exynos_drm_gem.h"
28#include "exynos_drm_plane.h"
29#include "exynos_drm_vidi.h"
30#include "exynos_drm_dmabuf.h"
31#include "exynos_drm_g2d.h"
32#include "exynos_drm_ipp.h"
33#include "exynos_drm_iommu.h"
34
35#define DRIVER_NAME	"exynos"
36#define DRIVER_DESC	"Samsung SoC DRM"
37#define DRIVER_DATE	"20110530"
38#define DRIVER_MAJOR	1
39#define DRIVER_MINOR	0
40
41static struct platform_device *exynos_drm_pdev;
42
43static DEFINE_MUTEX(drm_component_lock);
44static LIST_HEAD(drm_component_list);
45
46struct component_dev {
47	struct list_head list;
48	struct device *crtc_dev;
49	struct device *conn_dev;
50	enum exynos_drm_output_type out_type;
51	unsigned int dev_type_flag;
52};
53
54static int exynos_drm_load(struct drm_device *dev, unsigned long flags)
55{
56	struct exynos_drm_private *private;
57	int ret;
58
59	private = kzalloc(sizeof(struct exynos_drm_private), GFP_KERNEL);
60	if (!private)
61		return -ENOMEM;
62
63	dev_set_drvdata(dev->dev, dev);
64	dev->dev_private = (void *)private;
65
66	/*
67	 * create mapping to manage iommu table and set a pointer to iommu
68	 * mapping structure to iommu_mapping of private data.
69	 * also this iommu_mapping can be used to check if iommu is supported
70	 * or not.
71	 */
72	ret = drm_create_iommu_mapping(dev);
73	if (ret < 0) {
74		DRM_ERROR("failed to create iommu mapping.\n");
75		goto err_free_private;
76	}
77
78	drm_mode_config_init(dev);
79
80	exynos_drm_mode_config_init(dev);
81
82	/* setup possible_clones. */
83	exynos_drm_encoder_setup(dev);
84
85	platform_set_drvdata(dev->platformdev, dev);
86
87	/* Try to bind all sub drivers. */
88	ret = component_bind_all(dev->dev, dev);
89	if (ret)
90		goto err_mode_config_cleanup;
91
92	ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
93	if (ret)
94		goto err_unbind_all;
95
96	/* Probe non kms sub drivers and virtual display driver. */
97	ret = exynos_drm_device_subdrv_probe(dev);
98	if (ret)
99		goto err_cleanup_vblank;
100
101	/*
102	 * enable drm irq mode.
103	 * - with irq_enabled = true, we can use the vblank feature.
104	 *
105	 * P.S. note that we wouldn't use drm irq handler but
106	 *	just specific driver own one instead because
107	 *	drm framework supports only one irq handler.
108	 */
109	dev->irq_enabled = true;
110
111	/*
112	 * with vblank_disable_allowed = true, vblank interrupt will be disabled
113	 * by drm timer once a current process gives up ownership of
114	 * vblank event.(after drm_vblank_put function is called)
115	 */
116	dev->vblank_disable_allowed = true;
117
118	/* init kms poll for handling hpd */
119	drm_kms_helper_poll_init(dev);
120
121	/* force connectors detection */
122	drm_helper_hpd_irq_event(dev);
123
124	return 0;
125
126err_cleanup_vblank:
127	drm_vblank_cleanup(dev);
128err_unbind_all:
129	component_unbind_all(dev->dev, dev);
130err_mode_config_cleanup:
131	drm_mode_config_cleanup(dev);
132	drm_release_iommu_mapping(dev);
133err_free_private:
134	kfree(private);
135
136	return ret;
137}
138
139static int exynos_drm_unload(struct drm_device *dev)
140{
141	exynos_drm_device_subdrv_remove(dev);
142
143	exynos_drm_fbdev_fini(dev);
144	drm_kms_helper_poll_fini(dev);
145
146	drm_vblank_cleanup(dev);
147	component_unbind_all(dev->dev, dev);
148	drm_mode_config_cleanup(dev);
149	drm_release_iommu_mapping(dev);
150
151	kfree(dev->dev_private);
152	dev->dev_private = NULL;
153
154	return 0;
155}
156
157static int exynos_drm_suspend(struct drm_device *dev, pm_message_t state)
158{
159	struct drm_connector *connector;
160
161	drm_modeset_lock_all(dev);
162	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
163		int old_dpms = connector->dpms;
164
165		if (connector->funcs->dpms)
166			connector->funcs->dpms(connector, DRM_MODE_DPMS_OFF);
167
168		/* Set the old mode back to the connector for resume */
169		connector->dpms = old_dpms;
170	}
171	drm_modeset_unlock_all(dev);
172
173	return 0;
174}
175
176static int exynos_drm_resume(struct drm_device *dev)
177{
178	struct drm_connector *connector;
179
180	drm_modeset_lock_all(dev);
181	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
182		if (connector->funcs->dpms) {
183			int dpms = connector->dpms;
184
185			connector->dpms = DRM_MODE_DPMS_OFF;
186			connector->funcs->dpms(connector, dpms);
187		}
188	}
189	drm_modeset_unlock_all(dev);
190
191	return 0;
192}
193
194static int exynos_drm_open(struct drm_device *dev, struct drm_file *file)
195{
196	struct drm_exynos_file_private *file_priv;
197	int ret;
198
199	file_priv = kzalloc(sizeof(*file_priv), GFP_KERNEL);
200	if (!file_priv)
201		return -ENOMEM;
202
203	file->driver_priv = file_priv;
204
205	ret = exynos_drm_subdrv_open(dev, file);
206	if (ret)
207		goto err_file_priv_free;
208
209	return ret;
210
211err_file_priv_free:
212	kfree(file_priv);
213	file->driver_priv = NULL;
214	return ret;
215}
216
217static void exynos_drm_preclose(struct drm_device *dev,
218					struct drm_file *file)
219{
220	exynos_drm_subdrv_close(dev, file);
221}
222
223static void exynos_drm_postclose(struct drm_device *dev, struct drm_file *file)
224{
225	struct drm_pending_event *e, *et;
226	unsigned long flags;
227
228	if (!file->driver_priv)
229		return;
230
231	spin_lock_irqsave(&dev->event_lock, flags);
232	/* Release all events handled by page flip handler but not freed. */
233	list_for_each_entry_safe(e, et, &file->event_list, link) {
234		list_del(&e->link);
235		e->destroy(e);
236	}
237	spin_unlock_irqrestore(&dev->event_lock, flags);
238
239	kfree(file->driver_priv);
240	file->driver_priv = NULL;
241}
242
243static void exynos_drm_lastclose(struct drm_device *dev)
244{
245	exynos_drm_fbdev_restore_mode(dev);
246}
247
248static const struct vm_operations_struct exynos_drm_gem_vm_ops = {
249	.fault = exynos_drm_gem_fault,
250	.open = drm_gem_vm_open,
251	.close = drm_gem_vm_close,
252};
253
254static const struct drm_ioctl_desc exynos_ioctls[] = {
255	DRM_IOCTL_DEF_DRV(EXYNOS_GEM_CREATE, exynos_drm_gem_create_ioctl,
256			DRM_UNLOCKED | DRM_AUTH),
257	DRM_IOCTL_DEF_DRV(EXYNOS_GEM_GET,
258			exynos_drm_gem_get_ioctl, DRM_UNLOCKED),
259	DRM_IOCTL_DEF_DRV(EXYNOS_VIDI_CONNECTION,
260			vidi_connection_ioctl, DRM_UNLOCKED | DRM_AUTH),
261	DRM_IOCTL_DEF_DRV(EXYNOS_G2D_GET_VER,
262			exynos_g2d_get_ver_ioctl, DRM_UNLOCKED | DRM_AUTH),
263	DRM_IOCTL_DEF_DRV(EXYNOS_G2D_SET_CMDLIST,
264			exynos_g2d_set_cmdlist_ioctl, DRM_UNLOCKED | DRM_AUTH),
265	DRM_IOCTL_DEF_DRV(EXYNOS_G2D_EXEC,
266			exynos_g2d_exec_ioctl, DRM_UNLOCKED | DRM_AUTH),
267	DRM_IOCTL_DEF_DRV(EXYNOS_IPP_GET_PROPERTY,
268			exynos_drm_ipp_get_property, DRM_UNLOCKED | DRM_AUTH),
269	DRM_IOCTL_DEF_DRV(EXYNOS_IPP_SET_PROPERTY,
270			exynos_drm_ipp_set_property, DRM_UNLOCKED | DRM_AUTH),
271	DRM_IOCTL_DEF_DRV(EXYNOS_IPP_QUEUE_BUF,
272			exynos_drm_ipp_queue_buf, DRM_UNLOCKED | DRM_AUTH),
273	DRM_IOCTL_DEF_DRV(EXYNOS_IPP_CMD_CTRL,
274			exynos_drm_ipp_cmd_ctrl, DRM_UNLOCKED | DRM_AUTH),
275};
276
277static const struct file_operations exynos_drm_driver_fops = {
278	.owner		= THIS_MODULE,
279	.open		= drm_open,
280	.mmap		= exynos_drm_gem_mmap,
281	.poll		= drm_poll,
282	.read		= drm_read,
283	.unlocked_ioctl	= drm_ioctl,
284#ifdef CONFIG_COMPAT
285	.compat_ioctl = drm_compat_ioctl,
286#endif
287	.release	= drm_release,
288};
289
290static struct drm_driver exynos_drm_driver = {
291	.driver_features	= DRIVER_MODESET | DRIVER_GEM | DRIVER_PRIME,
292	.load			= exynos_drm_load,
293	.unload			= exynos_drm_unload,
294	.suspend		= exynos_drm_suspend,
295	.resume			= exynos_drm_resume,
296	.open			= exynos_drm_open,
297	.preclose		= exynos_drm_preclose,
298	.lastclose		= exynos_drm_lastclose,
299	.postclose		= exynos_drm_postclose,
300	.set_busid		= drm_platform_set_busid,
301	.get_vblank_counter	= drm_vblank_count,
302	.enable_vblank		= exynos_drm_crtc_enable_vblank,
303	.disable_vblank		= exynos_drm_crtc_disable_vblank,
304	.gem_free_object	= exynos_drm_gem_free_object,
305	.gem_vm_ops		= &exynos_drm_gem_vm_ops,
306	.dumb_create		= exynos_drm_gem_dumb_create,
307	.dumb_map_offset	= exynos_drm_gem_dumb_map_offset,
308	.dumb_destroy		= drm_gem_dumb_destroy,
309	.prime_handle_to_fd	= drm_gem_prime_handle_to_fd,
310	.prime_fd_to_handle	= drm_gem_prime_fd_to_handle,
311	.gem_prime_export	= exynos_dmabuf_prime_export,
312	.gem_prime_import	= exynos_dmabuf_prime_import,
313	.ioctls			= exynos_ioctls,
314	.num_ioctls		= ARRAY_SIZE(exynos_ioctls),
315	.fops			= &exynos_drm_driver_fops,
316	.name	= DRIVER_NAME,
317	.desc	= DRIVER_DESC,
318	.date	= DRIVER_DATE,
319	.major	= DRIVER_MAJOR,
320	.minor	= DRIVER_MINOR,
321};
322
323#ifdef CONFIG_PM_SLEEP
324static int exynos_drm_sys_suspend(struct device *dev)
325{
326	struct drm_device *drm_dev = dev_get_drvdata(dev);
327	pm_message_t message;
328
329	if (pm_runtime_suspended(dev) || !drm_dev)
330		return 0;
331
332	message.event = PM_EVENT_SUSPEND;
333	return exynos_drm_suspend(drm_dev, message);
334}
335
336static int exynos_drm_sys_resume(struct device *dev)
337{
338	struct drm_device *drm_dev = dev_get_drvdata(dev);
339
340	if (pm_runtime_suspended(dev) || !drm_dev)
341		return 0;
342
343	return exynos_drm_resume(drm_dev);
344}
345#endif
346
347static const struct dev_pm_ops exynos_drm_pm_ops = {
348	SET_SYSTEM_SLEEP_PM_OPS(exynos_drm_sys_suspend, exynos_drm_sys_resume)
349};
350
351int exynos_drm_component_add(struct device *dev,
352				enum exynos_drm_device_type dev_type,
353				enum exynos_drm_output_type out_type)
354{
355	struct component_dev *cdev;
356
357	if (dev_type != EXYNOS_DEVICE_TYPE_CRTC &&
358			dev_type != EXYNOS_DEVICE_TYPE_CONNECTOR) {
359		DRM_ERROR("invalid device type.\n");
360		return -EINVAL;
361	}
362
363	mutex_lock(&drm_component_lock);
364
365	/*
366	 * Make sure to check if there is a component which has two device
367	 * objects, for connector and for encoder/connector.
368	 * It should make sure that crtc and encoder/connector drivers are
369	 * ready before exynos drm core binds them.
370	 */
371	list_for_each_entry(cdev, &drm_component_list, list) {
372		if (cdev->out_type == out_type) {
373			/*
374			 * If crtc and encoder/connector device objects are
375			 * added already just return.
376			 */
377			if (cdev->dev_type_flag == (EXYNOS_DEVICE_TYPE_CRTC |
378						EXYNOS_DEVICE_TYPE_CONNECTOR)) {
379				mutex_unlock(&drm_component_lock);
380				return 0;
381			}
382
383			if (dev_type == EXYNOS_DEVICE_TYPE_CRTC) {
384				cdev->crtc_dev = dev;
385				cdev->dev_type_flag |= dev_type;
386			}
387
388			if (dev_type == EXYNOS_DEVICE_TYPE_CONNECTOR) {
389				cdev->conn_dev = dev;
390				cdev->dev_type_flag |= dev_type;
391			}
392
393			mutex_unlock(&drm_component_lock);
394			return 0;
395		}
396	}
397
398	mutex_unlock(&drm_component_lock);
399
400	cdev = kzalloc(sizeof(*cdev), GFP_KERNEL);
401	if (!cdev)
402		return -ENOMEM;
403
404	if (dev_type == EXYNOS_DEVICE_TYPE_CRTC)
405		cdev->crtc_dev = dev;
406	if (dev_type == EXYNOS_DEVICE_TYPE_CONNECTOR)
407		cdev->conn_dev = dev;
408
409	cdev->out_type = out_type;
410	cdev->dev_type_flag = dev_type;
411
412	mutex_lock(&drm_component_lock);
413	list_add_tail(&cdev->list, &drm_component_list);
414	mutex_unlock(&drm_component_lock);
415
416	return 0;
417}
418
419void exynos_drm_component_del(struct device *dev,
420				enum exynos_drm_device_type dev_type)
421{
422	struct component_dev *cdev, *next;
423
424	mutex_lock(&drm_component_lock);
425
426	list_for_each_entry_safe(cdev, next, &drm_component_list, list) {
427		if (dev_type == EXYNOS_DEVICE_TYPE_CRTC) {
428			if (cdev->crtc_dev == dev) {
429				cdev->crtc_dev = NULL;
430				cdev->dev_type_flag &= ~dev_type;
431			}
432		}
433
434		if (dev_type == EXYNOS_DEVICE_TYPE_CONNECTOR) {
435			if (cdev->conn_dev == dev) {
436				cdev->conn_dev = NULL;
437				cdev->dev_type_flag &= ~dev_type;
438			}
439		}
440
441		/*
442		 * Release cdev object only in case that both of crtc and
443		 * encoder/connector device objects are NULL.
444		 */
445		if (!cdev->crtc_dev && !cdev->conn_dev) {
446			list_del(&cdev->list);
447			kfree(cdev);
448		}
449	}
450
451	mutex_unlock(&drm_component_lock);
452}
453
454static int compare_dev(struct device *dev, void *data)
455{
456	return dev == (struct device *)data;
457}
458
459static struct component_match *exynos_drm_match_add(struct device *dev)
460{
461	struct component_match *match = NULL;
462	struct component_dev *cdev;
463	unsigned int attach_cnt = 0;
464
465	mutex_lock(&drm_component_lock);
466
467	/* Do not retry to probe if there is no any kms driver regitered. */
468	if (list_empty(&drm_component_list)) {
469		mutex_unlock(&drm_component_lock);
470		return ERR_PTR(-ENODEV);
471	}
472
473	list_for_each_entry(cdev, &drm_component_list, list) {
474		/*
475		 * Add components to master only in case that crtc and
476		 * encoder/connector device objects exist.
477		 */
478		if (!cdev->crtc_dev || !cdev->conn_dev)
479			continue;
480
481		attach_cnt++;
482
483		mutex_unlock(&drm_component_lock);
484
485		/*
486		 * fimd and dpi modules have same device object so add
487		 * only crtc device object in this case.
488		 */
489		if (cdev->crtc_dev == cdev->conn_dev) {
490			component_match_add(dev, &match, compare_dev,
491						cdev->crtc_dev);
492			goto out_lock;
493		}
494
495		/*
496		 * Do not chage below call order.
497		 * crtc device first should be added to master because
498		 * connector/encoder need pipe number of crtc when they
499		 * are created.
500		 */
501		component_match_add(dev, &match, compare_dev, cdev->crtc_dev);
502		component_match_add(dev, &match, compare_dev, cdev->conn_dev);
503
504out_lock:
505		mutex_lock(&drm_component_lock);
506	}
507
508	mutex_unlock(&drm_component_lock);
509
510	return attach_cnt ? match : ERR_PTR(-EPROBE_DEFER);
511}
512
513static int exynos_drm_bind(struct device *dev)
514{
515	return drm_platform_init(&exynos_drm_driver, to_platform_device(dev));
516}
517
518static void exynos_drm_unbind(struct device *dev)
519{
520	drm_put_dev(dev_get_drvdata(dev));
521}
522
523static const struct component_master_ops exynos_drm_ops = {
524	.bind		= exynos_drm_bind,
525	.unbind		= exynos_drm_unbind,
526};
527
528static struct platform_driver *const exynos_drm_kms_drivers[] = {
529#ifdef CONFIG_DRM_EXYNOS_FIMD
530	&fimd_driver,
531#endif
532#ifdef CONFIG_DRM_EXYNOS7_DECON
533	&decon_driver,
534#endif
535#ifdef CONFIG_DRM_EXYNOS_DP
536	&dp_driver,
537#endif
538#ifdef CONFIG_DRM_EXYNOS_DSI
539	&dsi_driver,
540#endif
541#ifdef CONFIG_DRM_EXYNOS_HDMI
542	&mixer_driver,
543	&hdmi_driver,
544#endif
545};
546
547static struct platform_driver *const exynos_drm_non_kms_drivers[] = {
548#ifdef CONFIG_DRM_EXYNOS_G2D
549	&g2d_driver,
550#endif
551#ifdef CONFIG_DRM_EXYNOS_FIMC
552	&fimc_driver,
553#endif
554#ifdef CONFIG_DRM_EXYNOS_ROTATOR
555	&rotator_driver,
556#endif
557#ifdef CONFIG_DRM_EXYNOS_GSC
558	&gsc_driver,
559#endif
560#ifdef CONFIG_DRM_EXYNOS_IPP
561	&ipp_driver,
562#endif
563};
564
565static int exynos_drm_platform_probe(struct platform_device *pdev)
566{
567	struct component_match *match;
568
569	pdev->dev.coherent_dma_mask = DMA_BIT_MASK(32);
570	exynos_drm_driver.num_ioctls = ARRAY_SIZE(exynos_ioctls);
571
572	match = exynos_drm_match_add(&pdev->dev);
573	if (IS_ERR(match)) {
574		return PTR_ERR(match);
575	}
576
577	return component_master_add_with_match(&pdev->dev, &exynos_drm_ops,
578					       match);
579}
580
581static int exynos_drm_platform_remove(struct platform_device *pdev)
582{
583	component_master_del(&pdev->dev, &exynos_drm_ops);
584	return 0;
585}
586
587static const char * const strings[] = {
588	"samsung,exynos3",
589	"samsung,exynos4",
590	"samsung,exynos5",
591	"samsung,exynos7",
592};
593
594static struct platform_driver exynos_drm_platform_driver = {
595	.probe	= exynos_drm_platform_probe,
596	.remove	= exynos_drm_platform_remove,
597	.driver	= {
598		.name	= "exynos-drm",
599		.pm	= &exynos_drm_pm_ops,
600	},
601};
602
603static int exynos_drm_init(void)
604{
605	bool is_exynos = false;
606	int ret, i, j;
607
608	/*
609	 * Register device object only in case of Exynos SoC.
610	 *
611	 * Below codes resolves temporarily infinite loop issue incurred
612	 * by Exynos drm driver when using multi-platform kernel.
613	 * So these codes will be replaced with more generic way later.
614	 */
615	for (i = 0; i < ARRAY_SIZE(strings); i++) {
616		if (of_machine_is_compatible(strings[i])) {
617			is_exynos = true;
618			break;
619		}
620	}
621
622	if (!is_exynos)
623		return -ENODEV;
624
625	exynos_drm_pdev = platform_device_register_simple("exynos-drm", -1,
626								NULL, 0);
627	if (IS_ERR(exynos_drm_pdev))
628		return PTR_ERR(exynos_drm_pdev);
629
630	ret = exynos_drm_probe_vidi();
631	if (ret < 0)
632		goto err_unregister_pd;
633
634	for (i = 0; i < ARRAY_SIZE(exynos_drm_kms_drivers); ++i) {
635		ret = platform_driver_register(exynos_drm_kms_drivers[i]);
636		if (ret < 0)
637			goto err_unregister_kms_drivers;
638	}
639
640	for (j = 0; j < ARRAY_SIZE(exynos_drm_non_kms_drivers); ++j) {
641		ret = platform_driver_register(exynos_drm_non_kms_drivers[j]);
642		if (ret < 0)
643			goto err_unregister_non_kms_drivers;
644	}
645
646#ifdef CONFIG_DRM_EXYNOS_IPP
647	ret = exynos_platform_device_ipp_register();
648	if (ret < 0)
649		goto err_unregister_non_kms_drivers;
650#endif
651
652	ret = platform_driver_register(&exynos_drm_platform_driver);
653	if (ret)
654		goto err_unregister_resources;
655
656	return 0;
657
658err_unregister_resources:
659#ifdef CONFIG_DRM_EXYNOS_IPP
660	exynos_platform_device_ipp_unregister();
661#endif
662
663err_unregister_non_kms_drivers:
664	while (--j >= 0)
665		platform_driver_unregister(exynos_drm_non_kms_drivers[j]);
666
667err_unregister_kms_drivers:
668	while (--i >= 0)
669		platform_driver_unregister(exynos_drm_kms_drivers[i]);
670
671	exynos_drm_remove_vidi();
672
673err_unregister_pd:
674	platform_device_unregister(exynos_drm_pdev);
675
676	return ret;
677}
678
679static void exynos_drm_exit(void)
680{
681	int i;
682
683#ifdef CONFIG_DRM_EXYNOS_IPP
684	exynos_platform_device_ipp_unregister();
685#endif
686
687	for (i = ARRAY_SIZE(exynos_drm_non_kms_drivers) - 1; i >= 0; --i)
688		platform_driver_unregister(exynos_drm_non_kms_drivers[i]);
689
690	for (i = ARRAY_SIZE(exynos_drm_kms_drivers) - 1; i >= 0; --i)
691		platform_driver_unregister(exynos_drm_kms_drivers[i]);
692
693	platform_driver_unregister(&exynos_drm_platform_driver);
694
695	exynos_drm_remove_vidi();
696
697	platform_device_unregister(exynos_drm_pdev);
698}
699
700module_init(exynos_drm_init);
701module_exit(exynos_drm_exit);
702
703MODULE_AUTHOR("Inki Dae <inki.dae@samsung.com>");
704MODULE_AUTHOR("Joonyoung Shim <jy0922.shim@samsung.com>");
705MODULE_AUTHOR("Seung-Woo Kim <sw0312.kim@samsung.com>");
706MODULE_DESCRIPTION("Samsung SoC DRM Driver");
707MODULE_LICENSE("GPL");
708