[linux-2.6-block.git] / drivers / gpu / drm / drm_debugfs.c

/*
 * Created: Sun Dec 21 13:08:50 2008 by bgamari@gmail.com
 *
 * Copyright 2008 Ben Gamari <bgamari@gmail.com>
 *
 * 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
 * VA LINUX SYSTEMS AND/OR ITS SUPPLIERS 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 <linux/debugfs.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/export.h>

#include <drm/drm_debugfs.h>
#include <drm/drm_edid.h>
#include <drm/drm_atomic.h>
#include <drm/drmP.h>

#include "drm_internal.h"
#include "drm_crtc_internal.h"

#if defined(CONFIG_DEBUG_FS)

/***************************************************
 * Initialization, etc.
 **************************************************/

static const struct drm_info_list drm_debugfs_list[] = {
	{"name", drm_name_info, 0},
	{"clients", drm_clients_info, 0},
	{"gem_names", drm_gem_name_info, DRIVER_GEM},
};
#define DRM_DEBUGFS_ENTRIES ARRAY_SIZE(drm_debugfs_list)


static int drm_debugfs_open(struct inode *inode, struct file *file)
{
	struct drm_info_node *node = inode->i_private;

	return single_open(file, node->info_ent->show, node);
}


static const struct file_operations drm_debugfs_fops = {
	.owner = THIS_MODULE,
	.open = drm_debugfs_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
};


/**
 * drm_debugfs_create_files - Initialize a given set of debugfs files for DRM
 * 			minor
 * @files: The array of files to create
 * @count: The number of files given
 * @root: DRI debugfs dir entry.
 * @minor: device minor number
 *
 * Create a given set of debugfs files represented by an array of
 * &struct drm_info_list in the given root directory. These files will be removed
 * automatically on drm_debugfs_cleanup().
 */
int drm_debugfs_create_files(const struct drm_info_list *files, int count,
			     struct dentry *root, struct drm_minor *minor)
{
	struct drm_device *dev = minor->dev;
	struct dentry *ent;
	struct drm_info_node *tmp;
	int i, ret;

	for (i = 0; i < count; i++) {
		u32 features = files[i].driver_features;

		if (features != 0 &&
		    (dev->driver->driver_features & features) != features)
			continue;

		tmp = kmalloc(sizeof(struct drm_info_node), GFP_KERNEL);
		if (tmp == NULL) {
			ret = -1;
			goto fail;
		}
		ent = debugfs_create_file(files[i].name, S_IFREG | S_IRUGO,
					  root, tmp, &drm_debugfs_fops);
		if (!ent) {
			DRM_ERROR("Cannot create /sys/kernel/debug/dri/%pd/%s\n",
				  root, files[i].name);
			kfree(tmp);
			ret = -1;
			goto fail;
		}

		tmp->minor = minor;
		tmp->dent = ent;
		tmp->info_ent = &files[i];

		mutex_lock(&minor->debugfs_lock);
		list_add(&tmp->list, &minor->debugfs_list);
		mutex_unlock(&minor->debugfs_lock);
	}
	return 0;

fail:
	drm_debugfs_remove_files(files, count, minor);
	return ret;
}
EXPORT_SYMBOL(drm_debugfs_create_files);

int drm_debugfs_init(struct drm_minor *minor, int minor_id,
		     struct dentry *root)
{
	struct drm_device *dev = minor->dev;
	char name[64];
	int ret;

	INIT_LIST_HEAD(&minor->debugfs_list);
	mutex_init(&minor->debugfs_lock);
	sprintf(name, "%d", minor_id);
	minor->debugfs_root = debugfs_create_dir(name, root);
	if (!minor->debugfs_root) {
		DRM_ERROR("Cannot create /sys/kernel/debug/dri/%s\n", name);
		return -1;
	}

	ret = drm_debugfs_create_files(drm_debugfs_list, DRM_DEBUGFS_ENTRIES,
				       minor->debugfs_root, minor);
	if (ret) {
		debugfs_remove(minor->debugfs_root);
		minor->debugfs_root = NULL;
		DRM_ERROR("Failed to create core drm debugfs files\n");
		return ret;
	}

	if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
		ret = drm_atomic_debugfs_init(minor);
		if (ret) {
			DRM_ERROR("Failed to create atomic debugfs files\n");
			return ret;
		}
	}

	if (drm_core_check_feature(dev, DRIVER_MODESET)) {
		ret = drm_framebuffer_debugfs_init(minor);
		if (ret) {
			DRM_ERROR("Failed to create framebuffer debugfs file\n");
			return ret;
		}
	}

	if (dev->driver->debugfs_init) {
		ret = dev->driver->debugfs_init(minor);
		if (ret) {
			DRM_ERROR("DRM: Driver failed to initialize "
				  "/sys/kernel/debug/dri.\n");
			return ret;
		}
	}
	return 0;
}


int drm_debugfs_remove_files(const struct drm_info_list *files, int count,
			     struct drm_minor *minor)
{
	struct list_head *pos, *q;
	struct drm_info_node *tmp;
	int i;

	mutex_lock(&minor->debugfs_lock);
	for (i = 0; i < count; i++) {
		list_for_each_safe(pos, q, &minor->debugfs_list) {
			tmp = list_entry(pos, struct drm_info_node, list);
			if (tmp->info_ent == &files[i]) {
				debugfs_remove(tmp->dent);
				list_del(pos);
				kfree(tmp);
			}
		}
	}
	mutex_unlock(&minor->debugfs_lock);
	return 0;
}
EXPORT_SYMBOL(drm_debugfs_remove_files);

static void drm_debugfs_remove_all_files(struct drm_minor *minor)
{
	struct drm_info_node *node, *tmp;

	mutex_lock(&minor->debugfs_lock);
	list_for_each_entry_safe(node, tmp, &minor->debugfs_list, list) {
		debugfs_remove(node->dent);
		list_del(&node->list);
		kfree(node);
	}
	mutex_unlock(&minor->debugfs_lock);
}

int drm_debugfs_cleanup(struct drm_minor *minor)
{
	if (!minor->debugfs_root)
		return 0;

	drm_debugfs_remove_all_files(minor);

	debugfs_remove_recursive(minor->debugfs_root);
	minor->debugfs_root = NULL;

	return 0;
}

static int connector_show(struct seq_file *m, void *data)
{
	struct drm_connector *connector = m->private;

	seq_printf(m, "%s\n", drm_get_connector_force_name(connector->force));

	return 0;
}

static int connector_open(struct inode *inode, struct file *file)
{
	struct drm_connector *dev = inode->i_private;

	return single_open(file, connector_show, dev);
}

static ssize_t connector_write(struct file *file, const char __user *ubuf,
			       size_t len, loff_t *offp)
{
	struct seq_file *m = file->private_data;
	struct drm_connector *connector = m->private;
	char buf[12];

	if (len > sizeof(buf) - 1)
		return -EINVAL;

	if (copy_from_user(buf, ubuf, len))
		return -EFAULT;

	buf[len] = '\0';

	if (!strcmp(buf, "on"))
		connector->force = DRM_FORCE_ON;
	else if (!strcmp(buf, "digital"))
		connector->force = DRM_FORCE_ON_DIGITAL;
	else if (!strcmp(buf, "off"))
		connector->force = DRM_FORCE_OFF;
	else if (!strcmp(buf, "unspecified"))
		connector->force = DRM_FORCE_UNSPECIFIED;
	else
		return -EINVAL;

	return len;
}

static int edid_show(struct seq_file *m, void *data)
{
	struct drm_connector *connector = m->private;
	struct drm_property_blob *edid = connector->edid_blob_ptr;

	if (connector->override_edid && edid)
		seq_write(m, edid->data, edid->length);

	return 0;
}

static int edid_open(struct inode *inode, struct file *file)
{
	struct drm_connector *dev = inode->i_private;

	return single_open(file, edid_show, dev);
}

static ssize_t edid_write(struct file *file, const char __user *ubuf,
			  size_t len, loff_t *offp)
{
	struct seq_file *m = file->private_data;
	struct drm_connector *connector = m->private;
	char *buf;
	struct edid *edid;
	int ret;

	buf = memdup_user(ubuf, len);
	if (IS_ERR(buf))
		return PTR_ERR(buf);

	edid = (struct edid *) buf;

	if (len == 5 && !strncmp(buf, "reset", 5)) {
		connector->override_edid = false;
		ret = drm_mode_connector_update_edid_property(connector, NULL);
	} else if (len < EDID_LENGTH ||
		   EDID_LENGTH * (1 + edid->extensions) > len)
		ret = -EINVAL;
	else {
		connector->override_edid = false;
		ret = drm_mode_connector_update_edid_property(connector, edid);
		if (!ret)
			connector->override_edid = true;
	}

	kfree(buf);

	return (ret) ? ret : len;
}

static const struct file_operations drm_edid_fops = {
	.owner = THIS_MODULE,
	.open = edid_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
	.write = edid_write
};


static const struct file_operations drm_connector_fops = {
	.owner = THIS_MODULE,
	.open = connector_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
	.write = connector_write
};

int drm_debugfs_connector_add(struct drm_connector *connector)
{
	struct drm_minor *minor = connector->dev->primary;
	struct dentry *root, *ent;

	if (!minor->debugfs_root)
		return -1;

	root = debugfs_create_dir(connector->name, minor->debugfs_root);
	if (!root)
		return -ENOMEM;

	connector->debugfs_entry = root;

	/* force */
	ent = debugfs_create_file("force", S_IRUGO | S_IWUSR, root, connector,
				  &drm_connector_fops);
	if (!ent)
		goto error;

	/* edid */
	ent = debugfs_create_file("edid_override", S_IRUGO | S_IWUSR, root,
				  connector, &drm_edid_fops);
	if (!ent)
		goto error;

	return 0;

error:
	debugfs_remove_recursive(connector->debugfs_entry);
	connector->debugfs_entry = NULL;
	return -ENOMEM;
}

void drm_debugfs_connector_remove(struct drm_connector *connector)
{
	if (!connector->debugfs_entry)
		return;

	debugfs_remove_recursive(connector->debugfs_entry);

	connector->debugfs_entry = NULL;
}

int drm_debugfs_crtc_add(struct drm_crtc *crtc)
{
	struct drm_minor *minor = crtc->dev->primary;
	struct dentry *root;
	char *name;

	name = kasprintf(GFP_KERNEL, "crtc-%d", crtc->index);
	if (!name)
		return -ENOMEM;

	root = debugfs_create_dir(name, minor->debugfs_root);
	kfree(name);
	if (!root)
		return -ENOMEM;

	crtc->debugfs_entry = root;

	if (drm_debugfs_crtc_crc_add(crtc))
		goto error;

	return 0;

error:
	drm_debugfs_crtc_remove(crtc);
	return -ENOMEM;
}

void drm_debugfs_crtc_remove(struct drm_crtc *crtc)
{
	debugfs_remove_recursive(crtc->debugfs_entry);
	crtc->debugfs_entry = NULL;
}

#endif /* CONFIG_DEBUG_FS */
Commit	Line	Data
28a62277 BG	1	/*
	2	* Created: Sun Dec 21 13:08:50 2008 by bgamari@gmail.com
	3	*
	4	* Copyright 2008 Ben Gamari <bgamari@gmail.com>
	5	*
	6	* Permission is hereby granted, free of charge, to any person obtaining a
	7	* copy of this software and associated documentation files (the "Software"),
	8	* to deal in the Software without restriction, including without limitation
	9	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	10	* and/or sell copies of the Software, and to permit persons to whom the
	11	* Software is furnished to do so, subject to the following conditions:
	12	*
	13	* The above copyright notice and this permission notice (including the next
	14	* paragraph) shall be included in all copies or substantial portions of the
	15	* Software.
	16	*
	17	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	18	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	19	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	20	* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
	21	* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
	22	* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	23	* OTHER DEALINGS IN THE SOFTWARE.
	24	*/
	25
	26	#include <linux/debugfs.h>
	27	#include <linux/seq_file.h>
5a0e3ad6	28	#include <linux/slab.h>
2d1a8a48	29	#include <linux/export.h>
4834442d DV	30
4834442d DV	31	#include <drm/drm_debugfs.h>
4cf2b281	32	#include <drm/drm_edid.h>
6559c901	33	#include <drm/drm_atomic.h>
4834442d DV	34	#include <drm/drmP.h>
4834442d DV	35
67d0ec4e	36	#include "drm_internal.h"
5bc9cb4d	37	#include "drm_crtc_internal.h"
28a62277 BG	38
	39	#if defined(CONFIG_DEBUG_FS)
	40
	41	/***************************************************
	42	* Initialization, etc.
	43	**************************************************/
	44
36f73b2f	45	static const struct drm_info_list drm_debugfs_list[] = {
28a62277	46	{"name", drm_name_info, 0},
28a62277	47	{"clients", drm_clients_info, 0},
28a62277	48	{"gem_names", drm_gem_name_info, DRIVER_GEM},
28a62277 BG	49	};
	50	#define DRM_DEBUGFS_ENTRIES ARRAY_SIZE(drm_debugfs_list)
	51
	52
	53	static int drm_debugfs_open(struct inode inode, struct file file)
	54	{
	55	struct drm_info_node *node = inode->i_private;
	56
	57	return single_open(file, node->info_ent->show, node);
	58	}
	59
	60
	61	static const struct file_operations drm_debugfs_fops = {
	62	.owner = THIS_MODULE,
	63	.open = drm_debugfs_open,
	64	.read = seq_read,
	65	.llseek = seq_lseek,
	66	.release = single_release,
	67	};
	68
	69
	70	/**
0cad7f71 DV	71	* drm_debugfs_create_files - Initialize a given set of debugfs files for DRM
	72	* minor
	73	* @files: The array of files to create
	74	* @count: The number of files given
	75	* @root: DRI debugfs dir entry.
	76	* @minor: device minor number
28a62277 BG	77	*
28a62277 BG	78	* Create a given set of debugfs files represented by an array of
0cad7f71	79	* &struct drm_info_list in the given root directory. These files will be removed
086f2e5c	80	* automatically on drm_debugfs_cleanup().
28a62277	81	*/
7d74795b	82	int drm_debugfs_create_files(const struct drm_info_list *files, int count,
28a62277 BG	83	struct dentry root, struct drm_minor minor)
	84	{
	85	struct drm_device *dev = minor->dev;
	86	struct dentry *ent;
	87	struct drm_info_node *tmp;
28a62277 BG	88	int i, ret;
	89
	90	for (i = 0; i < count; i++) {
	91	u32 features = files[i].driver_features;
	92
	93	if (features != 0 &&
	94	(dev->driver->driver_features & features) != features)
	95	continue;
	96
9a298b2a	97	tmp = kmalloc(sizeof(struct drm_info_node), GFP_KERNEL);
d25e3a6f JS	98	if (tmp == NULL) {
	99	ret = -1;
	100	goto fail;
	101	}
28a62277 BG	102	ent = debugfs_create_file(files[i].name, S_IFREG \| S_IRUGO,
	103	root, tmp, &drm_debugfs_fops);
	104	if (!ent) {
bcd599e7 AV	105	DRM_ERROR("Cannot create /sys/kernel/debug/dri/%pd/%s\n",
bcd599e7 AV	106	root, files[i].name);
9a298b2a	107	kfree(tmp);
28a62277 BG	108	ret = -1;
	109	goto fail;
	110	}
	111
	112	tmp->minor = minor;
	113	tmp->dent = ent;
	114	tmp->info_ent = &files[i];
b3e067c0 MS	115
	116	mutex_lock(&minor->debugfs_lock);
	117	list_add(&tmp->list, &minor->debugfs_list);
	118	mutex_unlock(&minor->debugfs_lock);
28a62277 BG	119	}
	120	return 0;
	121
	122	fail:
	123	drm_debugfs_remove_files(files, count, minor);
	124	return ret;
	125	}
	126	EXPORT_SYMBOL(drm_debugfs_create_files);
	127
28a62277 BG	128	int drm_debugfs_init(struct drm_minor *minor, int minor_id,
	129	struct dentry *root)
	130	{
	131	struct drm_device *dev = minor->dev;
	132	char name[64];
	133	int ret;
	134
b3e067c0 MS	135	INIT_LIST_HEAD(&minor->debugfs_list);
b3e067c0 MS	136	mutex_init(&minor->debugfs_lock);
28a62277 BG	137	sprintf(name, "%d", minor_id);
	138	minor->debugfs_root = debugfs_create_dir(name, root);
	139	if (!minor->debugfs_root) {
156f5a78	140	DRM_ERROR("Cannot create /sys/kernel/debug/dri/%s\n", name);
28a62277 BG	141	return -1;
	142	}
	143
	144	ret = drm_debugfs_create_files(drm_debugfs_list, DRM_DEBUGFS_ENTRIES,
	145	minor->debugfs_root, minor);
	146	if (ret) {
	147	debugfs_remove(minor->debugfs_root);
	148	minor->debugfs_root = NULL;
	149	DRM_ERROR("Failed to create core drm debugfs files\n");
	150	return ret;
	151	}
	152
6559c901 RC	153	if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
	154	ret = drm_atomic_debugfs_init(minor);
	155	if (ret) {
	156	DRM_ERROR("Failed to create atomic debugfs files\n");
	157	return ret;
	158	}
	159	}
	160
0c51ef86 NT	161	if (drm_core_check_feature(dev, DRIVER_MODESET)) {
	162	ret = drm_framebuffer_debugfs_init(minor);
	163	if (ret) {
	164	DRM_ERROR("Failed to create framebuffer debugfs file\n");
	165	return ret;
	166	}
45d58b40 NT	167	}
45d58b40 NT	168
28a62277 BG	169	if (dev->driver->debugfs_init) {
	170	ret = dev->driver->debugfs_init(minor);
	171	if (ret) {
	172	DRM_ERROR("DRM: Driver failed to initialize "
156f5a78	173	"/sys/kernel/debug/dri.\n");
28a62277 BG	174	return ret;
	175	}
	176	}
	177	return 0;
	178	}
	179
	180
7d74795b	181	int drm_debugfs_remove_files(const struct drm_info_list *files, int count,
28a62277 BG	182	struct drm_minor *minor)
	183	{
	184	struct list_head pos, q;
	185	struct drm_info_node *tmp;
	186	int i;
	187
b3e067c0	188	mutex_lock(&minor->debugfs_lock);
28a62277	189	for (i = 0; i < count; i++) {
b3e067c0	190	list_for_each_safe(pos, q, &minor->debugfs_list) {
28a62277 BG	191	tmp = list_entry(pos, struct drm_info_node, list);
	192	if (tmp->info_ent == &files[i]) {
	193	debugfs_remove(tmp->dent);
	194	list_del(pos);
9a298b2a	195	kfree(tmp);
28a62277 BG	196	}
	197	}
	198	}
b3e067c0	199	mutex_unlock(&minor->debugfs_lock);
28a62277 BG	200	return 0;
	201	}
	202	EXPORT_SYMBOL(drm_debugfs_remove_files);
	203
086f2e5c NT	204	static void drm_debugfs_remove_all_files(struct drm_minor *minor)
	205	{
	206	struct drm_info_node node, tmp;
	207
	208	mutex_lock(&minor->debugfs_lock);
	209	list_for_each_entry_safe(node, tmp, &minor->debugfs_list, list) {
	210	debugfs_remove(node->dent);
	211	list_del(&node->list);
	212	kfree(node);
	213	}
	214	mutex_unlock(&minor->debugfs_lock);
	215	}
	216
28a62277 BG	217	int drm_debugfs_cleanup(struct drm_minor *minor)
28a62277 BG	218	{
28a62277 BG	219	if (!minor->debugfs_root)
	220	return 0;
	221
086f2e5c	222	drm_debugfs_remove_all_files(minor);
28a62277	223
086f2e5c	224	debugfs_remove_recursive(minor->debugfs_root);
28a62277 BG	225	minor->debugfs_root = NULL;
	226
	227	return 0;
	228	}
	229
30f65707 TW	230	static int connector_show(struct seq_file m, void data)
	231	{
	232	struct drm_connector *connector = m->private;
30f65707	233
6140cf20	234	seq_printf(m, "%s\n", drm_get_connector_force_name(connector->force));
30f65707 TW	235
	236	return 0;
	237	}
	238
	239	static int connector_open(struct inode inode, struct file file)
	240	{
	241	struct drm_connector *dev = inode->i_private;
	242
	243	return single_open(file, connector_show, dev);
	244	}
	245
	246	static ssize_t connector_write(struct file file, const char __user ubuf,
	247	size_t len, loff_t *offp)
	248	{
	249	struct seq_file *m = file->private_data;
	250	struct drm_connector *connector = m->private;
	251	char buf[12];
	252
	253	if (len > sizeof(buf) - 1)
	254	return -EINVAL;
	255
	256	if (copy_from_user(buf, ubuf, len))
	257	return -EFAULT;
	258
	259	buf[len] = '\0';
	260
	261	if (!strcmp(buf, "on"))
	262	connector->force = DRM_FORCE_ON;
	263	else if (!strcmp(buf, "digital"))
	264	connector->force = DRM_FORCE_ON_DIGITAL;
	265	else if (!strcmp(buf, "off"))
	266	connector->force = DRM_FORCE_OFF;
	267	else if (!strcmp(buf, "unspecified"))
	268	connector->force = DRM_FORCE_UNSPECIFIED;
	269	else
	270	return -EINVAL;
	271
	272	return len;
	273	}
	274
4cf2b281 TW	275	static int edid_show(struct seq_file m, void data)
	276	{
	277	struct drm_connector *connector = m->private;
	278	struct drm_property_blob *edid = connector->edid_blob_ptr;
	279
	280	if (connector->override_edid && edid)
	281	seq_write(m, edid->data, edid->length);
	282
	283	return 0;
	284	}
	285
	286	static int edid_open(struct inode inode, struct file file)
	287	{
	288	struct drm_connector *dev = inode->i_private;
	289
	290	return single_open(file, edid_show, dev);
	291	}
	292
	293	static ssize_t edid_write(struct file file, const char __user ubuf,
	294	size_t len, loff_t *offp)
	295	{
	296	struct seq_file *m = file->private_data;
	297	struct drm_connector *connector = m->private;
	298	char *buf;
	299	struct edid *edid;
	300	int ret;
	301
	302	buf = memdup_user(ubuf, len);
	303	if (IS_ERR(buf))
	304	return PTR_ERR(buf);
	305
	306	edid = (struct edid *) buf;
	307
	308	if (len == 5 && !strncmp(buf, "reset", 5)) {
	309	connector->override_edid = false;
	310	ret = drm_mode_connector_update_edid_property(connector, NULL);
	311	} else if (len < EDID_LENGTH \|\|
	312	EDID_LENGTH * (1 + edid->extensions) > len)
	313	ret = -EINVAL;
	314	else {
	315	connector->override_edid = false;
	316	ret = drm_mode_connector_update_edid_property(connector, edid);
	317	if (!ret)
	318	connector->override_edid = true;
	319	}
	320
	321	kfree(buf);
	322
	323	return (ret) ? ret : len;
	324	}
	325
	326	static const struct file_operations drm_edid_fops = {
	327	.owner = THIS_MODULE,
	328	.open = edid_open,
	329	.read = seq_read,
	330	.llseek = seq_lseek,
	331	.release = single_release,
	332	.write = edid_write
	333	};
	334
	335
30f65707 TW	336	static const struct file_operations drm_connector_fops = {
	337	.owner = THIS_MODULE,
	338	.open = connector_open,
	339	.read = seq_read,
	340	.llseek = seq_lseek,
	341	.release = single_release,
	342	.write = connector_write
	343	};
	344
	345	int drm_debugfs_connector_add(struct drm_connector *connector)
	346	{
	347	struct drm_minor *minor = connector->dev->primary;
	348	struct dentry root, ent;
	349
	350	if (!minor->debugfs_root)
	351	return -1;
	352
	353	root = debugfs_create_dir(connector->name, minor->debugfs_root);
	354	if (!root)
	355	return -ENOMEM;
	356
	357	connector->debugfs_entry = root;
	358
	359	/* force */
	360	ent = debugfs_create_file("force", S_IRUGO \| S_IWUSR, root, connector,
	361	&drm_connector_fops);
	362	if (!ent)
	363	goto error;
	364
4cf2b281 TW	365	/* edid */
	366	ent = debugfs_create_file("edid_override", S_IRUGO \| S_IWUSR, root,
	367	connector, &drm_edid_fops);
	368	if (!ent)
	369	goto error;
	370
30f65707 TW	371	return 0;
	372
	373	error:
	374	debugfs_remove_recursive(connector->debugfs_entry);
	375	connector->debugfs_entry = NULL;
	376	return -ENOMEM;
	377	}
	378
	379	void drm_debugfs_connector_remove(struct drm_connector *connector)
	380	{
	381	if (!connector->debugfs_entry)
	382	return;
	383
	384	debugfs_remove_recursive(connector->debugfs_entry);
	385
	386	connector->debugfs_entry = NULL;
	387	}
	388
9edbf1fa TV	389	int drm_debugfs_crtc_add(struct drm_crtc *crtc)
	390	{
	391	struct drm_minor *minor = crtc->dev->primary;
	392	struct dentry *root;
	393	char *name;
	394
	395	name = kasprintf(GFP_KERNEL, "crtc-%d", crtc->index);
	396	if (!name)
	397	return -ENOMEM;
	398
	399	root = debugfs_create_dir(name, minor->debugfs_root);
	400	kfree(name);
	401	if (!root)
	402	return -ENOMEM;
	403
	404	crtc->debugfs_entry = root;
	405
	406	if (drm_debugfs_crtc_crc_add(crtc))
	407	goto error;
28a62277	408
9edbf1fa TV	409	return 0;
	410
	411	error:
	412	drm_debugfs_crtc_remove(crtc);
	413	return -ENOMEM;
	414	}
	415
	416	void drm_debugfs_crtc_remove(struct drm_crtc *crtc)
	417	{
	418	debugfs_remove_recursive(crtc->debugfs_entry);
	419	crtc->debugfs_entry = NULL;
	420	}
	421
	422	#endif /* CONFIG_DEBUG_FS */