[mirror_ubuntu-bionic-kernel.git] / drivers / gpu / drm / drm_platform.c

/*
 * Derived from drm_pci.c
 *
 * Copyright 2003 José Fonseca.
 * Copyright 2003 Leif Delgass.
 * Copyright (c) 2009, Code Aurora Forum.
 * All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
 * AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
 * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */

#include "drmP.h"

/**
 * Register.
 *
 * \param platdev - Platform device struture
 * \return zero on success or a negative number on failure.
 *
 * Attempt to gets inter module "drm" information. If we are first
 * then register the character device and inter module information.
 * Try and register, if we fail to register, backout previous work.
 */

int drm_get_platform_dev(struct platform_device *platdev,
			 struct drm_driver *driver)
{
	struct drm_device *dev;
	int ret;

	DRM_DEBUG("\n");

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

	dev->platformdev = platdev;
	dev->dev = &platdev->dev;

	ret = drm_fill_in_dev(dev, NULL, driver);

	if (ret) {
		printk(KERN_ERR "DRM: Fill_in_dev failed.\n");
		goto err_g1;
	}

	if (drm_core_check_feature(dev, DRIVER_MODESET)) {
		dev_set_drvdata(&platdev->dev, dev);
		ret = drm_get_minor(dev, &dev->control, DRM_MINOR_CONTROL);
		if (ret)
			goto err_g1;
	}

	ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY);
	if (ret)
		goto err_g2;

	if (dev->driver->load) {
		ret = dev->driver->load(dev, 0);
		if (ret)
			goto err_g3;
	}

	/* setup the grouping for the legacy output */
	if (drm_core_check_feature(dev, DRIVER_MODESET)) {
		ret = drm_mode_group_init_legacy_group(dev,
				&dev->primary->mode_group);
		if (ret)
			goto err_g3;
	}

	list_add_tail(&dev->driver_item, &driver->device_list);

	DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
		 driver->name, driver->major, driver->minor, driver->patchlevel,
		 driver->date, dev->primary->index);

	return 0;

err_g3:
	drm_put_minor(&dev->primary);
err_g2:
	if (drm_core_check_feature(dev, DRIVER_MODESET))
		drm_put_minor(&dev->control);
err_g1:
	kfree(dev);
	return ret;
}
EXPORT_SYMBOL(drm_get_platform_dev);

/**
 * Platform device initialization. Called via drm_init at module load time,
 *
 * \return zero on success or a negative number on failure.
 *
 * Initializes a drm_device structures,registering the
 * stubs
 *
 * Expands the \c DRIVER_PREINIT and \c DRIVER_POST_INIT macros before and
 * after the initialization for driver customization.
 */

int drm_platform_init(struct drm_driver *driver)
{
	return drm_get_platform_dev(driver->platform_device, driver);
}
Commit	Line	Data
dcdb1674 JC	1	/*
	2	* Derived from drm_pci.c
	3	*
	4	* Copyright 2003 José Fonseca.
	5	* Copyright 2003 Leif Delgass.
	6	* Copyright (c) 2009, Code Aurora Forum.
	7	* All Rights Reserved.
	8	*
	9	* Permission is hereby granted, free of charge, to any person obtaining a
	10	* copy of this software and associated documentation files (the "Software"),
	11	* to deal in the Software without restriction, including without limitation
	12	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	13	* and/or sell copies of the Software, and to permit persons to whom the
	14	* Software is furnished to do so, subject to the following conditions:
	15	*
	16	* The above copyright notice and this permission notice (including the next
	17	* paragraph) shall be included in all copies or substantial portions of the
	18	* Software.
	19	*
	20	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	21	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	22	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	23	* AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
	24	* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
	25	* WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
	26	*/
	27
	28	#include "drmP.h"
	29
	30	/**
	31	* Register.
	32	*
	33	* \param platdev - Platform device struture
	34	* \return zero on success or a negative number on failure.
	35	*
	36	* Attempt to gets inter module "drm" information. If we are first
	37	* then register the character device and inter module information.
	38	* Try and register, if we fail to register, backout previous work.
	39	*/
	40
	41	int drm_get_platform_dev(struct platform_device *platdev,
	42	struct drm_driver *driver)
	43	{
	44	struct drm_device *dev;
	45	int ret;
	46
	47	DRM_DEBUG("\n");
	48
	49	dev = kzalloc(sizeof(*dev), GFP_KERNEL);
	50	if (!dev)
	51	return -ENOMEM;
	52
	53	dev->platformdev = platdev;
	54	dev->dev = &platdev->dev;
	55
	56	ret = drm_fill_in_dev(dev, NULL, driver);
	57
	58	if (ret) {
	59	printk(KERN_ERR "DRM: Fill_in_dev failed.\n");
	60	goto err_g1;
	61	}
	62
	63	if (drm_core_check_feature(dev, DRIVER_MODESET)) {
	64	dev_set_drvdata(&platdev->dev, dev);
65	ret = drm_get_minor(dev, &dev->control, DRM_MINOR_CONTROL);
66	if (ret)
67	goto err_g1;
68	}
69
70	ret = drm_get_minor(dev, &dev->primary, DRM_MINOR_LEGACY);
71	if (ret)
72	goto err_g2;
73
74	if (dev->driver->load) {
75	ret = dev->driver->load(dev, 0);
76	if (ret)
77	goto err_g3;
78	}
79
80	/* setup the grouping for the legacy output */
81	if (drm_core_check_feature(dev, DRIVER_MODESET)) {
82	ret = drm_mode_group_init_legacy_group(dev,
83	&dev->primary->mode_group);
84	if (ret)
85	goto err_g3;
86	}
87
88	list_add_tail(&dev->driver_item, &driver->device_list);
89
90	DRM_INFO("Initialized %s %d.%d.%d %s on minor %d\n",
91	driver->name, driver->major, driver->minor, driver->patchlevel,
92	driver->date, dev->primary->index);
93
94	return 0;
95
96	err_g3:
97	drm_put_minor(&dev->primary);
98	err_g2:
99	if (drm_core_check_feature(dev, DRIVER_MODESET))
100	drm_put_minor(&dev->control);
101	err_g1:
102	kfree(dev);
103	return ret;
104	}
105	EXPORT_SYMBOL(drm_get_platform_dev);
106
107	/**
108	* Platform device initialization. Called via drm_init at module load time,
109	*
110	* \return zero on success or a negative number on failure.
111	*
112	* Initializes a drm_device structures,registering the
113	* stubs
114	*
115	* Expands the \c DRIVER_PREINIT and \c DRIVER_POST_INIT macros before and
116	* after the initialization for driver customization.
117	*/
118
119	int drm_platform_init(struct drm_driver *driver)
120	{
121	return drm_get_platform_dev(driver->platform_device, driver);
122	}