[deliverable/linux.git] / drivers / gpu / drm / armada / armada_drv.c

/*
 * Copyright (C) 2012 Russell King
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#include <linux/clk.h>
#include <linux/component.h>
#include <linux/module.h>
#include <linux/of_graph.h>
#include <drm/drmP.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_of.h>
#include "armada_crtc.h"
#include "armada_drm.h"
#include "armada_gem.h"
#include "armada_hw.h"
#include <drm/armada_drm.h>
#include "armada_ioctlP.h"

static void armada_drm_unref_work(struct work_struct *work)
{
	struct armada_private *priv =
		container_of(work, struct armada_private, fb_unref_work);
	struct drm_framebuffer *fb;

	while (kfifo_get(&priv->fb_unref, &fb))
		drm_framebuffer_unreference(fb);
}

/* Must be called with dev->event_lock held */
void __armada_drm_queue_unref_work(struct drm_device *dev,
	struct drm_framebuffer *fb)
{
	struct armada_private *priv = dev->dev_private;

	WARN_ON(!kfifo_put(&priv->fb_unref, fb));
	schedule_work(&priv->fb_unref_work);
}

void armada_drm_queue_unref_work(struct drm_device *dev,
	struct drm_framebuffer *fb)
{
	unsigned long flags;

	spin_lock_irqsave(&dev->event_lock, flags);
	__armada_drm_queue_unref_work(dev, fb);
	spin_unlock_irqrestore(&dev->event_lock, flags);
}

static int armada_drm_load(struct drm_device *dev, unsigned long flags)
{
	struct armada_private *priv;
	struct resource *mem = NULL;
	int ret, n;

	for (n = 0; ; n++) {
		struct resource *r = platform_get_resource(dev->platformdev,
							   IORESOURCE_MEM, n);
		if (!r)
			break;

		/* Resources above 64K are graphics memory */
		if (resource_size(r) > SZ_64K)
			mem = r;
		else
			return -EINVAL;
	}

	if (!mem)
		return -ENXIO;

	if (!devm_request_mem_region(dev->dev, mem->start,
			resource_size(mem), "armada-drm"))
		return -EBUSY;

	priv = devm_kzalloc(dev->dev, sizeof(*priv), GFP_KERNEL);
	if (!priv) {
		DRM_ERROR("failed to allocate private\n");
		return -ENOMEM;
	}

	platform_set_drvdata(dev->platformdev, dev);
	dev->dev_private = priv;

	INIT_WORK(&priv->fb_unref_work, armada_drm_unref_work);
	INIT_KFIFO(priv->fb_unref);

	/* Mode setting support */
	drm_mode_config_init(dev);
	dev->mode_config.min_width = 320;
	dev->mode_config.min_height = 200;

	/*
	 * With vscale enabled, the maximum width is 1920 due to the
	 * 1920 by 3 lines RAM
	 */
	dev->mode_config.max_width = 1920;
	dev->mode_config.max_height = 2048;

	dev->mode_config.preferred_depth = 24;
	dev->mode_config.funcs = &armada_drm_mode_config_funcs;
	drm_mm_init(&priv->linear, mem->start, resource_size(mem));
	mutex_init(&priv->linear_lock);

	ret = component_bind_all(dev->dev, dev);
	if (ret)
		goto err_kms;

	ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
	if (ret)
		goto err_comp;

	dev->irq_enabled = true;

	ret = armada_fbdev_init(dev);
	if (ret)
		goto err_comp;

	drm_kms_helper_poll_init(dev);

	return 0;

 err_comp:
	component_unbind_all(dev->dev, dev);
 err_kms:
	drm_mode_config_cleanup(dev);
	drm_mm_takedown(&priv->linear);
	flush_work(&priv->fb_unref_work);

	return ret;
}

static int armada_drm_unload(struct drm_device *dev)
{
	struct armada_private *priv = dev->dev_private;

	drm_kms_helper_poll_fini(dev);
	armada_fbdev_fini(dev);

	component_unbind_all(dev->dev, dev);

	drm_mode_config_cleanup(dev);
	drm_mm_takedown(&priv->linear);
	flush_work(&priv->fb_unref_work);
	dev->dev_private = NULL;

	return 0;
}

/* These are called under the vbl_lock. */
static int armada_drm_enable_vblank(struct drm_device *dev, unsigned int pipe)
{
	struct armada_private *priv = dev->dev_private;
	armada_drm_crtc_enable_irq(priv->dcrtc[pipe], VSYNC_IRQ_ENA);
	return 0;
}

static void armada_drm_disable_vblank(struct drm_device *dev, unsigned int pipe)
{
	struct armada_private *priv = dev->dev_private;
	armada_drm_crtc_disable_irq(priv->dcrtc[pipe], VSYNC_IRQ_ENA);
}

static struct drm_ioctl_desc armada_ioctls[] = {
	DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,0),
	DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl, 0),
	DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl, 0),
};

static void armada_drm_lastclose(struct drm_device *dev)
{
	armada_fbdev_lastclose(dev);
}

static const struct file_operations armada_drm_fops = {
	.owner			= THIS_MODULE,
	.llseek			= no_llseek,
	.read			= drm_read,
	.poll			= drm_poll,
	.unlocked_ioctl		= drm_ioctl,
	.mmap			= drm_gem_mmap,
	.open			= drm_open,
	.release		= drm_release,
};

static struct drm_driver armada_drm_driver = {
	.load			= armada_drm_load,
	.lastclose		= armada_drm_lastclose,
	.unload			= armada_drm_unload,
	.get_vblank_counter	= drm_vblank_no_hw_counter,
	.enable_vblank		= armada_drm_enable_vblank,
	.disable_vblank		= armada_drm_disable_vblank,
#ifdef CONFIG_DEBUG_FS
	.debugfs_init		= armada_drm_debugfs_init,
	.debugfs_cleanup	= armada_drm_debugfs_cleanup,
#endif
	.gem_free_object_unlocked = armada_gem_free_object,
	.prime_handle_to_fd	= drm_gem_prime_handle_to_fd,
	.prime_fd_to_handle	= drm_gem_prime_fd_to_handle,
	.gem_prime_export	= armada_gem_prime_export,
	.gem_prime_import	= armada_gem_prime_import,
	.dumb_create		= armada_gem_dumb_create,
	.dumb_map_offset	= armada_gem_dumb_map_offset,
	.dumb_destroy		= armada_gem_dumb_destroy,
	.gem_vm_ops		= &armada_gem_vm_ops,
	.major			= 1,
	.minor			= 0,
	.name			= "armada-drm",
	.desc			= "Armada SoC DRM",
	.date			= "20120730",
	.driver_features	= DRIVER_GEM | DRIVER_MODESET |
				  DRIVER_PRIME,
	.ioctls			= armada_ioctls,
	.fops			= &armada_drm_fops,
};

static int armada_drm_bind(struct device *dev)
{
	return drm_platform_init(&armada_drm_driver, to_platform_device(dev));
}

static void armada_drm_unbind(struct device *dev)
{
	drm_put_dev(dev_get_drvdata(dev));
}

static int compare_of(struct device *dev, void *data)
{
	return dev->of_node == data;
}

static int compare_dev_name(struct device *dev, void *data)
{
	const char *name = data;
	return !strcmp(dev_name(dev), name);
}

static void armada_add_endpoints(struct device *dev,
	struct component_match **match, struct device_node *port)
{
	struct device_node *ep, *remote;

	for_each_child_of_node(port, ep) {
		remote = of_graph_get_remote_port_parent(ep);
		if (!remote || !of_device_is_available(remote)) {
			of_node_put(remote);
			continue;
		} else if (!of_device_is_available(remote->parent)) {
			dev_warn(dev, "parent device of %s is not available\n",
				 remote->full_name);
			of_node_put(remote);
			continue;
		}

		component_match_add(dev, match, compare_of, remote);
		of_node_put(remote);
	}
}

static const struct component_master_ops armada_master_ops = {
	.bind = armada_drm_bind,
	.unbind = armada_drm_unbind,
};

static int armada_drm_probe(struct platform_device *pdev)
{
	struct component_match *match = NULL;
	struct device *dev = &pdev->dev;
	int ret;

	ret = drm_of_component_probe(dev, compare_dev_name, &armada_master_ops);
	if (ret != -EINVAL)
		return ret;

	if (dev->platform_data) {
		char **devices = dev->platform_data;
		struct device_node *port;
		struct device *d;
		int i;

		for (i = 0; devices[i]; i++)
			component_match_add(dev, &match, compare_dev_name,
					    devices[i]);

		if (i == 0) {
			dev_err(dev, "missing 'ports' property\n");
			return -ENODEV;
		}

		for (i = 0; devices[i]; i++) {
			d = bus_find_device_by_name(&platform_bus_type, NULL,
						    devices[i]);
			if (d && d->of_node) {
				for_each_child_of_node(d->of_node, port)
					armada_add_endpoints(dev, &match, port);
			}
			put_device(d);
		}
	}

	return component_master_add_with_match(&pdev->dev, &armada_master_ops,
					       match);
}

static int armada_drm_remove(struct platform_device *pdev)
{
	component_master_del(&pdev->dev, &armada_master_ops);
	return 0;
}

static const struct platform_device_id armada_drm_platform_ids[] = {
	{
		.name		= "armada-drm",
	}, {
		.name		= "armada-510-drm",
	},
	{ },
};
MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);

static struct platform_driver armada_drm_platform_driver = {
	.probe	= armada_drm_probe,
	.remove	= armada_drm_remove,
	.driver	= {
		.name	= "armada-drm",
	},
	.id_table = armada_drm_platform_ids,
};

static int __init armada_drm_init(void)
{
	int ret;

	armada_drm_driver.num_ioctls = ARRAY_SIZE(armada_ioctls);

	ret = platform_driver_register(&armada_lcd_platform_driver);
	if (ret)
		return ret;
	ret = platform_driver_register(&armada_drm_platform_driver);
	if (ret)
		platform_driver_unregister(&armada_lcd_platform_driver);
	return ret;
}
module_init(armada_drm_init);

static void __exit armada_drm_exit(void)
{
	platform_driver_unregister(&armada_drm_platform_driver);
	platform_driver_unregister(&armada_lcd_platform_driver);
}
module_exit(armada_drm_exit);

MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>");
MODULE_DESCRIPTION("Armada DRM Driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:armada-drm");
Commit	Line	Data
96f60e37 RK	1	/*
	2	* Copyright (C) 2012 Russell King
	3	*
	4	* This program is free software; you can redistribute it and/or modify
	5	* it under the terms of the GNU General Public License version 2 as
	6	* published by the Free Software Foundation.
	7	*/
	8	#include <linux/clk.h>
0101fd00	9	#include <linux/component.h>
96f60e37	10	#include <linux/module.h>
0101fd00	11	#include <linux/of_graph.h>
96f60e37 RK	12	#include <drm/drmP.h>
96f60e37 RK	13	#include <drm/drm_crtc_helper.h>
7fc7e86d	14	#include <drm/drm_of.h>
96f60e37 RK	15	#include "armada_crtc.h"
	16	#include "armada_drm.h"
	17	#include "armada_gem.h"
	18	#include "armada_hw.h"
	19	#include <drm/armada_drm.h>
	20	#include "armada_ioctlP.h"
	21
	22	static void armada_drm_unref_work(struct work_struct *work)
	23	{
	24	struct armada_private *priv =
	25	container_of(work, struct armada_private, fb_unref_work);
	26	struct drm_framebuffer *fb;
	27
	28	while (kfifo_get(&priv->fb_unref, &fb))
	29	drm_framebuffer_unreference(fb);
	30	}
	31
	32	/* Must be called with dev->event_lock held */
	33	void __armada_drm_queue_unref_work(struct drm_device *dev,
	34	struct drm_framebuffer *fb)
	35	{
	36	struct armada_private *priv = dev->dev_private;
	37
d13c46c6	38	WARN_ON(!kfifo_put(&priv->fb_unref, fb));
96f60e37 RK	39	schedule_work(&priv->fb_unref_work);
	40	}
	41
	42	void armada_drm_queue_unref_work(struct drm_device *dev,
	43	struct drm_framebuffer *fb)
	44	{
	45	unsigned long flags;
	46
	47	spin_lock_irqsave(&dev->event_lock, flags);
	48	__armada_drm_queue_unref_work(dev, fb);
	49	spin_unlock_irqrestore(&dev->event_lock, flags);
	50	}
	51
	52	static int armada_drm_load(struct drm_device *dev, unsigned long flags)
	53	{
96f60e37	54	struct armada_private *priv;
96f60e37	55	struct resource *mem = NULL;
0fb2970b	56	int ret, n;
96f60e37	57
0fb2970b	58	for (n = 0; ; n++) {
96f60e37 RK	59	struct resource *r = platform_get_resource(dev->platformdev,
	60	IORESOURCE_MEM, n);
	61	if (!r)
	62	break;
	63
	64	/* Resources above 64K are graphics memory */
	65	if (resource_size(r) > SZ_64K)
	66	mem = r;
96f60e37 RK	67	else
	68	return -EINVAL;
	69	}
	70
d8c96083	71	if (!mem)
96f60e37 RK	72	return -ENXIO;
	73
	74	if (!devm_request_mem_region(dev->dev, mem->start,
	75	resource_size(mem), "armada-drm"))
	76	return -EBUSY;
	77
	78	priv = devm_kzalloc(dev->dev, sizeof(*priv), GFP_KERNEL);
	79	if (!priv) {
	80	DRM_ERROR("failed to allocate private\n");
	81	return -ENOMEM;
	82	}
	83
50fb3c3b	84	platform_set_drvdata(dev->platformdev, dev);
96f60e37 RK	85	dev->dev_private = priv;
96f60e37 RK	86
96f60e37 RK	87	INIT_WORK(&priv->fb_unref_work, armada_drm_unref_work);
	88	INIT_KFIFO(priv->fb_unref);
	89
	90	/* Mode setting support */
	91	drm_mode_config_init(dev);
	92	dev->mode_config.min_width = 320;
	93	dev->mode_config.min_height = 200;
	94
	95	/*
	96	* With vscale enabled, the maximum width is 1920 due to the
	97	* 1920 by 3 lines RAM
	98	*/
	99	dev->mode_config.max_width = 1920;
	100	dev->mode_config.max_height = 2048;
	101
	102	dev->mode_config.preferred_depth = 24;
	103	dev->mode_config.funcs = &armada_drm_mode_config_funcs;
	104	drm_mm_init(&priv->linear, mem->start, resource_size(mem));
0b8ebeac	105	mutex_init(&priv->linear_lock);
96f60e37	106
0fb2970b RK	107	ret = component_bind_all(dev->dev, dev);
	108	if (ret)
	109	goto err_kms;
585b691e	110
d0165407	111	ret = drm_vblank_init(dev, dev->mode_config.num_crtc);
96f60e37	112	if (ret)
0101fd00	113	goto err_comp;
96f60e37	114
0544e38d	115	dev->irq_enabled = true;
96f60e37 RK	116
	117	ret = armada_fbdev_init(dev);
	118	if (ret)
0101fd00	119	goto err_comp;
96f60e37 RK	120
	121	drm_kms_helper_poll_init(dev);
	122
	123	return 0;
	124
0101fd00	125	err_comp:
0fb2970b	126	component_unbind_all(dev->dev, dev);
96f60e37 RK	127	err_kms:
	128	drm_mode_config_cleanup(dev);
	129	drm_mm_takedown(&priv->linear);
	130	flush_work(&priv->fb_unref_work);
	131
	132	return ret;
	133	}
	134
	135	static int armada_drm_unload(struct drm_device *dev)
	136	{
	137	struct armada_private *priv = dev->dev_private;
	138
	139	drm_kms_helper_poll_fini(dev);
	140	armada_fbdev_fini(dev);
0101fd00	141
0fb2970b	142	component_unbind_all(dev->dev, dev);
0101fd00	143
96f60e37 RK	144	drm_mode_config_cleanup(dev);
	145	drm_mm_takedown(&priv->linear);
	146	flush_work(&priv->fb_unref_work);
	147	dev->dev_private = NULL;
	148
	149	return 0;
	150	}
	151
96f60e37	152	/* These are called under the vbl_lock. */
88e72717	153	static int armada_drm_enable_vblank(struct drm_device *dev, unsigned int pipe)
96f60e37 RK	154	{
96f60e37 RK	155	struct armada_private *priv = dev->dev_private;
88e72717	156	armada_drm_crtc_enable_irq(priv->dcrtc[pipe], VSYNC_IRQ_ENA);
96f60e37 RK	157	return 0;
	158	}
	159
88e72717	160	static void armada_drm_disable_vblank(struct drm_device *dev, unsigned int pipe)
96f60e37 RK	161	{
96f60e37 RK	162	struct armada_private *priv = dev->dev_private;
88e72717	163	armada_drm_crtc_disable_irq(priv->dcrtc[pipe], VSYNC_IRQ_ENA);
96f60e37 RK	164	}
96f60e37 RK	165
96f60e37	166	static struct drm_ioctl_desc armada_ioctls[] = {
f8c47144 DV	167	DRM_IOCTL_DEF_DRV(ARMADA_GEM_CREATE, armada_gem_create_ioctl,0),
	168	DRM_IOCTL_DEF_DRV(ARMADA_GEM_MMAP, armada_gem_mmap_ioctl, 0),
	169	DRM_IOCTL_DEF_DRV(ARMADA_GEM_PWRITE, armada_gem_pwrite_ioctl, 0),
96f60e37 RK	170	};
96f60e37 RK	171
2f5ae490 RK	172	static void armada_drm_lastclose(struct drm_device *dev)
	173	{
	174	armada_fbdev_lastclose(dev);
	175	}
	176
96f60e37 RK	177	static const struct file_operations armada_drm_fops = {
	178	.owner = THIS_MODULE,
	179	.llseek = no_llseek,
	180	.read = drm_read,
	181	.poll = drm_poll,
	182	.unlocked_ioctl = drm_ioctl,
	183	.mmap = drm_gem_mmap,
	184	.open = drm_open,
	185	.release = drm_release,
	186	};
	187
	188	static struct drm_driver armada_drm_driver = {
	189	.load = armada_drm_load,
2f5ae490	190	.lastclose = armada_drm_lastclose,
96f60e37	191	.unload = armada_drm_unload,
b44f8408	192	.get_vblank_counter = drm_vblank_no_hw_counter,
96f60e37 RK	193	.enable_vblank = armada_drm_enable_vblank,
96f60e37 RK	194	.disable_vblank = armada_drm_disable_vblank,
96f60e37 RK	195	#ifdef CONFIG_DEBUG_FS
	196	.debugfs_init = armada_drm_debugfs_init,
	197	.debugfs_cleanup = armada_drm_debugfs_cleanup,
	198	#endif
87adc638	199	.gem_free_object_unlocked = armada_gem_free_object,
96f60e37 RK	200	.prime_handle_to_fd = drm_gem_prime_handle_to_fd,
	201	.prime_fd_to_handle = drm_gem_prime_fd_to_handle,
	202	.gem_prime_export = armada_gem_prime_export,
	203	.gem_prime_import = armada_gem_prime_import,
	204	.dumb_create = armada_gem_dumb_create,
	205	.dumb_map_offset = armada_gem_dumb_map_offset,
	206	.dumb_destroy = armada_gem_dumb_destroy,
	207	.gem_vm_ops = &armada_gem_vm_ops,
	208	.major = 1,
	209	.minor = 0,
	210	.name = "armada-drm",
	211	.desc = "Armada SoC DRM",
	212	.date = "20120730",
	213	.driver_features = DRIVER_GEM \| DRIVER_MODESET \|
e1f96ef4	214	DRIVER_PRIME,
96f60e37 RK	215	.ioctls = armada_ioctls,
	216	.fops = &armada_drm_fops,
	217	};
	218
0101fd00 RK	219	static int armada_drm_bind(struct device *dev)
	220	{
	221	return drm_platform_init(&armada_drm_driver, to_platform_device(dev));
	222	}
	223
	224	static void armada_drm_unbind(struct device *dev)
	225	{
	226	drm_put_dev(dev_get_drvdata(dev));
	227	}
	228
	229	static int compare_of(struct device dev, void data)
	230	{
	231	return dev->of_node == data;
	232	}
	233
	234	static int compare_dev_name(struct device dev, void data)
	235	{
	236	const char *name = data;
	237	return !strcmp(dev_name(dev), name);
	238	}
	239
	240	static void armada_add_endpoints(struct device *dev,
	241	struct component_match *match, struct device_node port)
	242	{
	243	struct device_node ep, remote;
	244
	245	for_each_child_of_node(port, ep) {
	246	remote = of_graph_get_remote_port_parent(ep);
	247	if (!remote \|\| !of_device_is_available(remote)) {
	248	of_node_put(remote);
	249	continue;
	250	} else if (!of_device_is_available(remote->parent)) {
	251	dev_warn(dev, "parent device of %s is not available\n",
	252	remote->full_name);
	253	of_node_put(remote);
	254	continue;
	255	}
	256
	257	component_match_add(dev, match, compare_of, remote);
	258	of_node_put(remote);
	259	}
	260	}
	261
7fc7e86d LD	262	static const struct component_master_ops armada_master_ops = {
	263	.bind = armada_drm_bind,
	264	.unbind = armada_drm_unbind,
	265	};
0101fd00	266
7fc7e86d LD	267	static int armada_drm_probe(struct platform_device *pdev)
	268	{
	269	struct component_match *match = NULL;
	270	struct device *dev = &pdev->dev;
	271	int ret;
0101fd00	272
7fc7e86d LD	273	ret = drm_of_component_probe(dev, compare_dev_name, &armada_master_ops);
	274	if (ret != -EINVAL)
	275	return ret;
0101fd00	276
7fc7e86d	277	if (dev->platform_data) {
0101fd00	278	char **devices = dev->platform_data;
7fc7e86d	279	struct device_node *port;
0101fd00	280	struct device *d;
7fc7e86d	281	int i;
0101fd00 RK	282
0101fd00 RK	283	for (i = 0; devices[i]; i++)
7fc7e86d	284	component_match_add(dev, &match, compare_dev_name,
0101fd00 RK	285	devices[i]);
	286
	287	if (i == 0) {
	288	dev_err(dev, "missing 'ports' property\n");
	289	return -ENODEV;
	290	}
	291
	292	for (i = 0; devices[i]; i++) {
	293	d = bus_find_device_by_name(&platform_bus_type, NULL,
7fc7e86d	294	devices[i]);
0101fd00 RK	295	if (d && d->of_node) {
0101fd00 RK	296	for_each_child_of_node(d->of_node, port)
7fc7e86d	297	armada_add_endpoints(dev, &match, port);
0101fd00 RK	298	}
	299	put_device(d);
	300	}
	301	}
	302
0fb2970b RK	303	return component_master_add_with_match(&pdev->dev, &armada_master_ops,
0fb2970b RK	304	match);
96f60e37 RK	305	}
	306
	307	static int armada_drm_remove(struct platform_device *pdev)
	308	{
0fb2970b	309	component_master_del(&pdev->dev, &armada_master_ops);
96f60e37 RK	310	return 0;
	311	}
	312
	313	static const struct platform_device_id armada_drm_platform_ids[] = {
	314	{
	315	.name = "armada-drm",
96f60e37 RK	316	}, {
96f60e37 RK	317	.name = "armada-510-drm",
96f60e37 RK	318	},
	319	{ },
	320	};
	321	MODULE_DEVICE_TABLE(platform, armada_drm_platform_ids);
	322
	323	static struct platform_driver armada_drm_platform_driver = {
	324	.probe = armada_drm_probe,
	325	.remove = armada_drm_remove,
	326	.driver = {
	327	.name = "armada-drm",
96f60e37 RK	328	},
	329	.id_table = armada_drm_platform_ids,
	330	};
	331
	332	static int __init armada_drm_init(void)
	333	{
d8c96083 RK	334	int ret;
d8c96083 RK	335
f95aeb17	336	armada_drm_driver.num_ioctls = ARRAY_SIZE(armada_ioctls);
d8c96083 RK	337
	338	ret = platform_driver_register(&armada_lcd_platform_driver);
	339	if (ret)
	340	return ret;
	341	ret = platform_driver_register(&armada_drm_platform_driver);
	342	if (ret)
	343	platform_driver_unregister(&armada_lcd_platform_driver);
	344	return ret;
96f60e37 RK	345	}
	346	module_init(armada_drm_init);
	347
	348	static void __exit armada_drm_exit(void)
	349	{
	350	platform_driver_unregister(&armada_drm_platform_driver);
d8c96083	351	platform_driver_unregister(&armada_lcd_platform_driver);
96f60e37 RK	352	}
	353	module_exit(armada_drm_exit);
	354
	355	MODULE_AUTHOR("Russell King <rmk+kernel@arm.linux.org.uk>");
	356	MODULE_DESCRIPTION("Armada DRM Driver");
	357	MODULE_LICENSE("GPL");
	358	MODULE_ALIAS("platform:armada-drm");