drivers/gpu/drm/armada/armada_drv.c - kernel/msm-5.4 - Gitiles

 /*
  * 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 "armada_crtc.h"
 #include "armada_drm.h"
 #include "armada_gem.h"
 #include "armada_hw.h"
 #include <drm/armada_drm.h>
 #include "armada_ioctlP.h"

 #ifdef CONFIG_DRM_ARMADA_TDA1998X
 #include <drm/i2c/tda998x.h>
 #include "armada_slave.h"

 static struct tda998x_encoder_params params = {
 	/* With 0x24, there is no translation between vp_out and int_vp
 	FB	LCD out	Pins	VIP	Int Vp
 	R:23:16	R:7:0	VPC7:0	7:0	7:0[R]
 	G:15:8	G:15:8	VPB7:0	23:16	23:16[G]
 	B:7:0	B:23:16	VPA7:0	15:8	15:8[B]
 	*/
 	.swap_a = 2,
 	.swap_b = 3,
 	.swap_c = 4,
 	.swap_d = 5,
 	.swap_e = 0,
 	.swap_f = 1,
 	.audio_cfg = BIT(2),
 	.audio_frame[1] = 1,
 	.audio_format = AFMT_SPDIF,
 	.audio_sample_rate = 44100,
 };

 static const struct armada_drm_slave_config tda19988_config = {
 	.i2c_adapter_id = 0,
 	.crtcs = 1 << 0, /* Only LCD0 at the moment */
 	.polled = DRM_CONNECTOR_POLL_CONNECT | DRM_CONNECTOR_POLL_DISCONNECT,
 	.interlace_allowed = true,
 	.info = {
 		.type = "tda998x",
 		.addr = 0x70,
 		.platform_data = &params,
 	},
 };
 #endif

 static bool is_componentized(struct device *dev)
 {
 	return dev->of_node || dev->platform_data;
 }

 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)
 {
 	const struct platform_device_id *id;
 	const struct armada_variant *variant;
 	struct armada_private *priv;
 	struct resource *res[ARRAY_SIZE(priv->dcrtc)];
 	struct resource *mem = NULL;
 	int ret, n, i;

 	memset(res, 0, sizeof(res));

 	for (n = i = 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 if (i < ARRAY_SIZE(priv->dcrtc))
 			res[i++] = 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;

 	/* Get the implementation specific driver data. */
 	id = platform_get_device_id(dev->platformdev);
 	if (!id)
 		return -ENXIO;

 	variant = (const struct armada_variant *)id->driver_data;

 	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));

 	/* Create all LCD controllers */
 	for (n = 0; n < ARRAY_SIZE(priv->dcrtc); n++) {
 		int irq;

 		if (!res[n])
 			break;

 		irq = platform_get_irq(dev->platformdev, n);
 		if (irq < 0)
 			goto err_kms;

 		ret = armada_drm_crtc_create(dev, dev->dev, res[n], irq,
 					     variant, NULL);
 		if (ret)
 			goto err_kms;
 	}

 	if (is_componentized(dev->dev)) {
 		ret = component_bind_all(dev->dev, dev);
 		if (ret)
 			goto err_kms;
 	} else {
 #ifdef CONFIG_DRM_ARMADA_TDA1998X
 		ret = armada_drm_connector_slave_create(dev, &tda19988_config);
 		if (ret)
 			goto err_kms;
 #endif
 	}

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

 	dev->irq_enabled = true;
 	dev->vblank_disable_allowed = 1;

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

 	drm_kms_helper_poll_init(dev);

 	return 0;

  err_comp:
 	if (is_componentized(dev->dev))
 		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);

 	if (is_componentized(dev->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;
 }

 void armada_drm_vbl_event_add(struct armada_crtc *dcrtc,
 	struct armada_vbl_event *evt)
 {
 	unsigned long flags;

 	spin_lock_irqsave(&dcrtc->irq_lock, flags);
 	if (list_empty(&evt->node)) {
 		list_add_tail(&evt->node, &dcrtc->vbl_list);

 		drm_vblank_get(dcrtc->crtc.dev, dcrtc->num);
 	}
 	spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
 }

 void armada_drm_vbl_event_remove(struct armada_crtc *dcrtc,
 	struct armada_vbl_event *evt)
 {
 	if (!list_empty(&evt->node)) {
 		list_del_init(&evt->node);
 		drm_vblank_put(dcrtc->crtc.dev, dcrtc->num);
 	}
 }

 void armada_drm_vbl_event_remove_unlocked(struct armada_crtc *dcrtc,
 	struct armada_vbl_event *evt)
 {
 	unsigned long flags;

 	spin_lock_irqsave(&dcrtc->irq_lock, flags);
 	armada_drm_vbl_event_remove(dcrtc, evt);
 	spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
 }

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

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

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

 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,
 	.open			= NULL,
 	.preclose		= NULL,
 	.postclose		= NULL,
 	.lastclose		= armada_drm_lastclose,
 	.unload			= armada_drm_unload,
 	.set_busid		= drm_platform_set_busid,
 	.get_vblank_counter	= drm_vblank_count,
 	.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	= 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_HAVE_IRQ | 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 int armada_drm_find_components(struct device *dev,
 	struct component_match **match)
 {
 	struct device_node *port;
 	int i;

 	if (dev->of_node) {
 		struct device_node *np = dev->of_node;

 		for (i = 0; ; i++) {
 			port = of_parse_phandle(np, "ports", i);
 			if (!port)
 				break;

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

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

 		for (i = 0; ; i++) {
 			port = of_parse_phandle(np, "ports", i);
 			if (!port)
 				break;

 			armada_add_endpoints(dev, match, port);
 			of_node_put(port);
 		}
 	} else if (dev->platform_data) {
 		char **devices = dev->platform_data;
 		struct device *d;

 		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 0;
 }

 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)
 {
 	if (is_componentized(&pdev->dev)) {
 		struct component_match *match = NULL;
 		int ret;

 		ret = armada_drm_find_components(&pdev->dev, &match);
 		if (ret < 0)
 			return ret;

 		return component_master_add_with_match(&pdev->dev,
 				&armada_master_ops, match);
 	} else {
 		return drm_platform_init(&armada_drm_driver, pdev);
 	}
 }

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

 static const struct platform_device_id armada_drm_platform_ids[] = {
 	{
 		.name		= "armada-drm",
 		.driver_data	= (unsigned long)&armada510_ops,
 	}, {
 		.name		= "armada-510-drm",
 		.driver_data	= (unsigned long)&armada510_ops,
 	},
 	{ },
 };
 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",
 		.owner	= THIS_MODULE,
 	},
 	.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");
	/*
	* 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 "armada_crtc.h"
	#include "armada_drm.h"
	#include "armada_gem.h"
	#include "armada_hw.h"
	#include <drm/armada_drm.h>
	#include "armada_ioctlP.h"

	#ifdef CONFIG_DRM_ARMADA_TDA1998X
	#include <drm/i2c/tda998x.h>
	#include "armada_slave.h"

	static struct tda998x_encoder_params params = {
	/* With 0x24, there is no translation between vp_out and int_vp
	FB LCD out Pins VIP Int Vp
	R:23:16 R:7:0 VPC7:0 7:0 7:0[R]
	G:15:8 G:15:8 VPB7:0 23:16 23:16[G]
	B:7:0 B:23:16 VPA7:0 15:8 15:8[B]
	*/
	.swap_a = 2,
	.swap_b = 3,
	.swap_c = 4,
	.swap_d = 5,
	.swap_e = 0,
	.swap_f = 1,
	.audio_cfg = BIT(2),
	.audio_frame[1] = 1,
	.audio_format = AFMT_SPDIF,
	.audio_sample_rate = 44100,
	};

	static const struct armada_drm_slave_config tda19988_config = {
	.i2c_adapter_id = 0,
	.crtcs = 1 << 0, /* Only LCD0 at the moment */
	.polled = DRM_CONNECTOR_POLL_CONNECT \| DRM_CONNECTOR_POLL_DISCONNECT,
	.interlace_allowed = true,
	.info = {
	.type = "tda998x",
	.addr = 0x70,
	.platform_data = &params,
	},
	};
	#endif

	static bool is_componentized(struct device *dev)
	{
	return dev->of_node \|\| dev->platform_data;
	}

	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)
	{
	const struct platform_device_id *id;
	const struct armada_variant *variant;
	struct armada_private *priv;
	struct resource *res[ARRAY_SIZE(priv->dcrtc)];
	struct resource *mem = NULL;
	int ret, n, i;

	memset(res, 0, sizeof(res));

	for (n = i = 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 if (i < ARRAY_SIZE(priv->dcrtc))
	res[i++] = 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;

	/* Get the implementation specific driver data. */
	id = platform_get_device_id(dev->platformdev);
	if (!id)
	return -ENXIO;

	variant = (const struct armada_variant *)id->driver_data;

	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));

	/* Create all LCD controllers */
	for (n = 0; n < ARRAY_SIZE(priv->dcrtc); n++) {
	int irq;

	if (!res[n])
	break;

	irq = platform_get_irq(dev->platformdev, n);
	if (irq < 0)
	goto err_kms;

	ret = armada_drm_crtc_create(dev, dev->dev, res[n], irq,
	variant, NULL);
	if (ret)
	goto err_kms;
	}

	if (is_componentized(dev->dev)) {
	ret = component_bind_all(dev->dev, dev);
	if (ret)
	goto err_kms;
	} else {
	#ifdef CONFIG_DRM_ARMADA_TDA1998X
	ret = armada_drm_connector_slave_create(dev, &tda19988_config);
	if (ret)
	goto err_kms;
	#endif
	}

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

	dev->irq_enabled = true;
	dev->vblank_disable_allowed = 1;

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

	drm_kms_helper_poll_init(dev);

	return 0;

	err_comp:
	if (is_componentized(dev->dev))
	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);

	if (is_componentized(dev->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;
	}

	void armada_drm_vbl_event_add(struct armada_crtc *dcrtc,
	struct armada_vbl_event *evt)
	{
	unsigned long flags;

	spin_lock_irqsave(&dcrtc->irq_lock, flags);
	if (list_empty(&evt->node)) {
	list_add_tail(&evt->node, &dcrtc->vbl_list);

	drm_vblank_get(dcrtc->crtc.dev, dcrtc->num);
	}
	spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
	}

	void armada_drm_vbl_event_remove(struct armada_crtc *dcrtc,
	struct armada_vbl_event *evt)
	{
	if (!list_empty(&evt->node)) {
	list_del_init(&evt->node);
	drm_vblank_put(dcrtc->crtc.dev, dcrtc->num);
	}
	}

	void armada_drm_vbl_event_remove_unlocked(struct armada_crtc *dcrtc,
	struct armada_vbl_event *evt)
	{
	unsigned long flags;

	spin_lock_irqsave(&dcrtc->irq_lock, flags);
	armada_drm_vbl_event_remove(dcrtc, evt);
	spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
	}

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

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

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

	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,
	.open = NULL,
	.preclose = NULL,
	.postclose = NULL,
	.lastclose = armada_drm_lastclose,
	.unload = armada_drm_unload,
	.set_busid = drm_platform_set_busid,
	.get_vblank_counter = drm_vblank_count,
	.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 = 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_HAVE_IRQ \| 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 int armada_drm_find_components(struct device *dev,
	struct component_match **match)
	{
	struct device_node *port;
	int i;

	if (dev->of_node) {
	struct device_node *np = dev->of_node;

	for (i = 0; ; i++) {
	port = of_parse_phandle(np, "ports", i);
	if (!port)
	break;

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

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

	for (i = 0; ; i++) {
	port = of_parse_phandle(np, "ports", i);
	if (!port)
	break;

	armada_add_endpoints(dev, match, port);
	of_node_put(port);
	}
	} else if (dev->platform_data) {
	char **devices = dev->platform_data;
	struct device *d;

	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 0;
	}

	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)
	{
	if (is_componentized(&pdev->dev)) {
	struct component_match *match = NULL;
	int ret;

	ret = armada_drm_find_components(&pdev->dev, &match);
	if (ret < 0)
	return ret;

	return component_master_add_with_match(&pdev->dev,
	&armada_master_ops, match);
	} else {
	return drm_platform_init(&armada_drm_driver, pdev);
	}
	}

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

	static const struct platform_device_id armada_drm_platform_ids[] = {
	{
	.name = "armada-drm",
	.driver_data = (unsigned long)&armada510_ops,
	}, {
	.name = "armada-510-drm",
	.driver_data = (unsigned long)&armada510_ops,
	},
	{ },
	};
	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",
	.owner = THIS_MODULE,
	},
	.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");