drivers/gpu/drm/armada/armada_drv.c - arm/linux - Git at Google

 /*
  * 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/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_put(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 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);
 }

 DEFINE_DRM_GEM_FOPS(armada_drm_fops);

 static struct drm_driver armada_drm_driver = {
 	.lastclose		= armada_drm_lastclose,
 	.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,
 	.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)
 {
 	struct armada_private *priv;
 	struct resource *mem = NULL;
 	int ret, n;

 	for (n = 0; ; n++) {
 		struct resource *r = platform_get_resource(to_platform_device(dev),
 							   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, mem->start, resource_size(mem),
 				     "armada-drm"))
 		return -EBUSY;

 	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
 	if (!priv)
 		return -ENOMEM;

 	/*
 	 * The drm_device structure must be at the start of
 	 * armada_private for drm_dev_unref() to work correctly.
 	 */
 	BUILD_BUG_ON(offsetof(struct armada_private, drm) != 0);

 	ret = drm_dev_init(&priv->drm, &armada_drm_driver, dev);
 	if (ret) {
 		dev_err(dev, "[" DRM_NAME ":%s] drm_dev_init failed: %d\n",
 			__func__, ret);
 		kfree(priv);
 		return ret;
 	}

 	priv->drm.dev_private = priv;

 	dev_set_drvdata(dev, &priv->drm);

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

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

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

 	priv->drm.mode_config.preferred_depth = 24;
 	priv->drm.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, &priv->drm);
 	if (ret)
 		goto err_kms;

 	ret = drm_vblank_init(&priv->drm, priv->drm.mode_config.num_crtc);
 	if (ret)
 		goto err_comp;

 	priv->drm.irq_enabled = true;

 	ret = armada_fbdev_init(&priv->drm);
 	if (ret)
 		goto err_comp;

 	drm_kms_helper_poll_init(&priv->drm);

 	ret = drm_dev_register(&priv->drm, 0);
 	if (ret)
 		goto err_poll;

 #ifdef CONFIG_DEBUG_FS
 	armada_drm_debugfs_init(priv->drm.primary);
 #endif

 	return 0;

  err_poll:
 	drm_kms_helper_poll_fini(&priv->drm);
 	armada_fbdev_fini(&priv->drm);
  err_comp:
 	component_unbind_all(dev, &priv->drm);
  err_kms:
 	drm_mode_config_cleanup(&priv->drm);
 	drm_mm_takedown(&priv->linear);
 	flush_work(&priv->fb_unref_work);
 	drm_dev_unref(&priv->drm);
 	return ret;
 }

 static void armada_drm_unbind(struct device *dev)
 {
 	struct drm_device *drm = dev_get_drvdata(dev);
 	struct armada_private *priv = drm->dev_private;

 	drm_kms_helper_poll_fini(&priv->drm);
 	armada_fbdev_fini(&priv->drm);

 	drm_dev_unregister(&priv->drm);

 	component_unbind_all(dev, &priv->drm);

 	drm_mode_config_cleanup(&priv->drm);
 	drm_mm_takedown(&priv->linear);
 	flush_work(&priv->fb_unref_work);

 	drm_dev_unref(&priv->drm);
 }

 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 %pOF is not available\n",
 				 remote);
 			of_node_put(remote);
 			continue;
 		}

 		drm_of_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");
	/*
	* 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/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_put(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 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);
	}

	DEFINE_DRM_GEM_FOPS(armada_drm_fops);

	static struct drm_driver armada_drm_driver = {
	.lastclose = armada_drm_lastclose,
	.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,
	.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)
	{
	struct armada_private *priv;
	struct resource *mem = NULL;
	int ret, n;

	for (n = 0; ; n++) {
	struct resource *r = platform_get_resource(to_platform_device(dev),
	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, mem->start, resource_size(mem),
	"armada-drm"))
	return -EBUSY;

	priv = kzalloc(sizeof(*priv), GFP_KERNEL);
	if (!priv)
	return -ENOMEM;

	/*
	* The drm_device structure must be at the start of
	* armada_private for drm_dev_unref() to work correctly.
	*/
	BUILD_BUG_ON(offsetof(struct armada_private, drm) != 0);

	ret = drm_dev_init(&priv->drm, &armada_drm_driver, dev);
	if (ret) {
	dev_err(dev, "[" DRM_NAME ":%s] drm_dev_init failed: %d\n",
	__func__, ret);
	kfree(priv);
	return ret;
	}

	priv->drm.dev_private = priv;

	dev_set_drvdata(dev, &priv->drm);

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

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

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

	priv->drm.mode_config.preferred_depth = 24;
	priv->drm.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, &priv->drm);
	if (ret)
	goto err_kms;

	ret = drm_vblank_init(&priv->drm, priv->drm.mode_config.num_crtc);
	if (ret)
	goto err_comp;

	priv->drm.irq_enabled = true;

	ret = armada_fbdev_init(&priv->drm);
	if (ret)
	goto err_comp;

	drm_kms_helper_poll_init(&priv->drm);

	ret = drm_dev_register(&priv->drm, 0);
	if (ret)
	goto err_poll;

	#ifdef CONFIG_DEBUG_FS
	armada_drm_debugfs_init(priv->drm.primary);
	#endif

	return 0;

	err_poll:
	drm_kms_helper_poll_fini(&priv->drm);
	armada_fbdev_fini(&priv->drm);
	err_comp:
	component_unbind_all(dev, &priv->drm);
	err_kms:
	drm_mode_config_cleanup(&priv->drm);
	drm_mm_takedown(&priv->linear);
	flush_work(&priv->fb_unref_work);
	drm_dev_unref(&priv->drm);
	return ret;
	}

	static void armada_drm_unbind(struct device *dev)
	{
	struct drm_device *drm = dev_get_drvdata(dev);
	struct armada_private *priv = drm->dev_private;

	drm_kms_helper_poll_fini(&priv->drm);
	armada_fbdev_fini(&priv->drm);

	drm_dev_unregister(&priv->drm);

	component_unbind_all(dev, &priv->drm);

	drm_mode_config_cleanup(&priv->drm);
	drm_mm_takedown(&priv->linear);
	flush_work(&priv->fb_unref_work);

	drm_dev_unref(&priv->drm);
	}

	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 %pOF is not available\n",
	remote);
	of_node_put(remote);
	continue;
	}

	drm_of_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");