[deliverable/linux.git] / drivers / gpu / drm / drm_debugfs.c

/**
 * \file drm_debugfs.c
 * debugfs support for DRM
 *
 * \author Ben Gamari <bgamari@gmail.com>
 */

/*
 * 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/drmP.h>
#include <drm/drm_edid.h>

#if defined(CONFIG_DEBUG_FS)

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

static const struct drm_info_list drm_debugfs_list[] = {
	{"name", drm_name_info, 0},
	{"vm", drm_vm_info, 0},
	{"clients", drm_clients_info, 0},
	{"bufs", drm_bufs_info, 0},
	{"gem_names", drm_gem_name_info, DRIVER_GEM},
	{"vma", drm_vma_info, 0},
};
#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,
};


/**
 * Initialize a given set of debugfs files for a device
 *
 * \param files The array of files to create
 * \param count The number of files given
 * \param root DRI debugfs dir entry.
 * \param minor device minor number
 * \return Zero on success, non-zero on failure
 *
 * Create a given set of debugfs files represented by an array of
 * gdm_debugfs_lists in the given root directory.
 */
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/%s/%s\n",
				  root->d_name.name, 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);

/**
 * Initialize the DRI debugfs filesystem for a device
 *
 * \param dev DRM device
 * \param minor device minor number
 * \param root DRI debugfs dir entry.
 *
 * Create the DRI debugfs root entry "/sys/kernel/debug/dri", the device debugfs root entry
 * "/sys/kernel/debug/dri/%minor%/", and each entry in debugfs_list as
 * "/sys/kernel/debug/dri/%minor%/%name%".
 */
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 (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;
}


/**
 * Remove a list of debugfs files
 *
 * \param files The list of files
 * \param count The number of files
 * \param minor The minor of which we should remove the files
 * \return always zero.
 *
 * Remove all debugfs entries created by debugfs_init().
 */
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);

/**
 * Cleanup the debugfs filesystem resources.
 *
 * \param minor device minor number.
 * \return always zero.
 *
 * Remove all debugfs entries created by debugfs_init().
 */
int drm_debugfs_cleanup(struct drm_minor *minor)
{
	struct drm_device *dev = minor->dev;

	if (!minor->debugfs_root)
		return 0;

	if (dev->driver->debugfs_cleanup)
		dev->driver->debugfs_cleanup(minor);

	drm_debugfs_remove_files(drm_debugfs_list, DRM_DEBUGFS_ENTRIES, minor);

	debugfs_remove(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;
	const char *status;

	switch (connector->force) {
	case DRM_FORCE_ON:
		status = "on\n";
		break;

	case DRM_FORCE_ON_DIGITAL:
		status = "digital\n";
		break;

	case DRM_FORCE_OFF:
		status = "off\n";
		break;

	case DRM_FORCE_UNSPECIFIED:
		status = "unspecified\n";
		break;

	default:
		return 0;
	}

	seq_puts(m, status);

	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;
}

#endif /* CONFIG_DEBUG_FS */
Commit	Line	Data
28a62277 BG	1	/**
	2	* \file drm_debugfs.c
	3	* debugfs support for DRM
	4	*
	5	* \author Ben Gamari <bgamari@gmail.com>
	6	*/
	7
	8	/*
	9	* Created: Sun Dec 21 13:08:50 2008 by bgamari@gmail.com
	10	*
	11	* Copyright 2008 Ben Gamari <bgamari@gmail.com>
	12	*
	13	* Permission is hereby granted, free of charge, to any person obtaining a
	14	* copy of this software and associated documentation files (the "Software"),
	15	* to deal in the Software without restriction, including without limitation
	16	* the rights to use, copy, modify, merge, publish, distribute, sublicense,
	17	* and/or sell copies of the Software, and to permit persons to whom the
	18	* Software is furnished to do so, subject to the following conditions:
	19	*
	20	* The above copyright notice and this permission notice (including the next
	21	* paragraph) shall be included in all copies or substantial portions of the
	22	* Software.
	23	*
	24	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	25	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	26	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
	27	* VA LINUX SYSTEMS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
	28	* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
	29	* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
	30	* OTHER DEALINGS IN THE SOFTWARE.
	31	*/
	32
	33	#include <linux/debugfs.h>
	34	#include <linux/seq_file.h>
5a0e3ad6	35	#include <linux/slab.h>
2d1a8a48	36	#include <linux/export.h>
760285e7	37	#include <drm/drmP.h>
4cf2b281	38	#include <drm/drm_edid.h>
28a62277 BG	39
	40	#if defined(CONFIG_DEBUG_FS)
	41
	42	/***************************************************
	43	* Initialization, etc.
	44	**************************************************/
	45
36f73b2f	46	static const struct drm_info_list drm_debugfs_list[] = {
28a62277 BG	47	{"name", drm_name_info, 0},
	48	{"vm", drm_vm_info, 0},
	49	{"clients", drm_clients_info, 0},
28a62277 BG	50	{"bufs", drm_bufs_info, 0},
28a62277 BG	51	{"gem_names", drm_gem_name_info, DRIVER_GEM},
28a62277	52	{"vma", drm_vma_info, 0},
28a62277 BG	53	};
	54	#define DRM_DEBUGFS_ENTRIES ARRAY_SIZE(drm_debugfs_list)
	55
	56
	57	static int drm_debugfs_open(struct inode inode, struct file file)
	58	{
	59	struct drm_info_node *node = inode->i_private;
	60
	61	return single_open(file, node->info_ent->show, node);
	62	}
	63
	64
	65	static const struct file_operations drm_debugfs_fops = {
	66	.owner = THIS_MODULE,
	67	.open = drm_debugfs_open,
	68	.read = seq_read,
	69	.llseek = seq_lseek,
	70	.release = single_release,
	71	};
	72
	73
	74	/**
	75	* Initialize a given set of debugfs files for a device
	76	*
	77	* \param files The array of files to create
	78	* \param count The number of files given
	79	* \param root DRI debugfs dir entry.
	80	* \param minor device minor number
	81	* \return Zero on success, non-zero on failure
	82	*
	83	* Create a given set of debugfs files represented by an array of
	84	* gdm_debugfs_lists in the given root directory.
	85	*/
7d74795b	86	int drm_debugfs_create_files(const struct drm_info_list *files, int count,
28a62277 BG	87	struct dentry root, struct drm_minor minor)
	88	{
	89	struct drm_device *dev = minor->dev;
	90	struct dentry *ent;
	91	struct drm_info_node *tmp;
28a62277 BG	92	int i, ret;
	93
	94	for (i = 0; i < count; i++) {
	95	u32 features = files[i].driver_features;
	96
	97	if (features != 0 &&
	98	(dev->driver->driver_features & features) != features)
	99	continue;
	100
9a298b2a	101	tmp = kmalloc(sizeof(struct drm_info_node), GFP_KERNEL);
d25e3a6f JS	102	if (tmp == NULL) {
	103	ret = -1;
	104	goto fail;
	105	}
28a62277 BG	106	ent = debugfs_create_file(files[i].name, S_IFREG \| S_IRUGO,
	107	root, tmp, &drm_debugfs_fops);
	108	if (!ent) {
156f5a78	109	DRM_ERROR("Cannot create /sys/kernel/debug/dri/%s/%s\n",
bd8315c4	110	root->d_name.name, files[i].name);
9a298b2a	111	kfree(tmp);
28a62277 BG	112	ret = -1;
	113	goto fail;
	114	}
	115
	116	tmp->minor = minor;
	117	tmp->dent = ent;
	118	tmp->info_ent = &files[i];
b3e067c0 MS	119
	120	mutex_lock(&minor->debugfs_lock);
	121	list_add(&tmp->list, &minor->debugfs_list);
	122	mutex_unlock(&minor->debugfs_lock);
28a62277 BG	123	}
	124	return 0;
	125
	126	fail:
	127	drm_debugfs_remove_files(files, count, minor);
	128	return ret;
	129	}
	130	EXPORT_SYMBOL(drm_debugfs_create_files);
	131
	132	/**
	133	* Initialize the DRI debugfs filesystem for a device
	134	*
	135	* \param dev DRM device
	136	* \param minor device minor number
	137	* \param root DRI debugfs dir entry.
	138	*
156f5a78 GL	139	* Create the DRI debugfs root entry "/sys/kernel/debug/dri", the device debugfs root entry
	140	* "/sys/kernel/debug/dri/%minor%/", and each entry in debugfs_list as
	141	* "/sys/kernel/debug/dri/%minor%/%name%".
28a62277 BG	142	*/
	143	int drm_debugfs_init(struct drm_minor *minor, int minor_id,
	144	struct dentry *root)
	145	{
	146	struct drm_device *dev = minor->dev;
	147	char name[64];
	148	int ret;
	149
b3e067c0 MS	150	INIT_LIST_HEAD(&minor->debugfs_list);
b3e067c0 MS	151	mutex_init(&minor->debugfs_lock);
28a62277 BG	152	sprintf(name, "%d", minor_id);
	153	minor->debugfs_root = debugfs_create_dir(name, root);
	154	if (!minor->debugfs_root) {
156f5a78	155	DRM_ERROR("Cannot create /sys/kernel/debug/dri/%s\n", name);
28a62277 BG	156	return -1;
	157	}
	158
	159	ret = drm_debugfs_create_files(drm_debugfs_list, DRM_DEBUGFS_ENTRIES,
	160	minor->debugfs_root, minor);
	161	if (ret) {
	162	debugfs_remove(minor->debugfs_root);
	163	minor->debugfs_root = NULL;
	164	DRM_ERROR("Failed to create core drm debugfs files\n");
	165	return ret;
	166	}
	167
	168	if (dev->driver->debugfs_init) {
	169	ret = dev->driver->debugfs_init(minor);
	170	if (ret) {
	171	DRM_ERROR("DRM: Driver failed to initialize "
156f5a78	172	"/sys/kernel/debug/dri.\n");
28a62277 BG	173	return ret;
	174	}
	175	}
	176	return 0;
	177	}
	178
	179
	180	/**
	181	* Remove a list of debugfs files
	182	*
	183	* \param files The list of files
	184	* \param count The number of files
	185	* \param minor The minor of which we should remove the files
	186	* \return always zero.
	187	*
	188	* Remove all debugfs entries created by debugfs_init().
	189	*/
7d74795b	190	int drm_debugfs_remove_files(const struct drm_info_list *files, int count,
28a62277 BG	191	struct drm_minor *minor)
	192	{
	193	struct list_head pos, q;
	194	struct drm_info_node *tmp;
	195	int i;
	196
b3e067c0	197	mutex_lock(&minor->debugfs_lock);
28a62277	198	for (i = 0; i < count; i++) {
b3e067c0	199	list_for_each_safe(pos, q, &minor->debugfs_list) {
28a62277 BG	200	tmp = list_entry(pos, struct drm_info_node, list);
	201	if (tmp->info_ent == &files[i]) {
	202	debugfs_remove(tmp->dent);
	203	list_del(pos);
9a298b2a	204	kfree(tmp);
28a62277 BG	205	}
	206	}
	207	}
b3e067c0	208	mutex_unlock(&minor->debugfs_lock);
28a62277 BG	209	return 0;
	210	}
	211	EXPORT_SYMBOL(drm_debugfs_remove_files);
	212
	213	/**
	214	* Cleanup the debugfs filesystem resources.
	215	*
	216	* \param minor device minor number.
	217	* \return always zero.
	218	*
	219	* Remove all debugfs entries created by debugfs_init().
	220	*/
	221	int drm_debugfs_cleanup(struct drm_minor *minor)
	222	{
	223	struct drm_device *dev = minor->dev;
	224
	225	if (!minor->debugfs_root)
	226	return 0;
	227
	228	if (dev->driver->debugfs_cleanup)
	229	dev->driver->debugfs_cleanup(minor);
	230
	231	drm_debugfs_remove_files(drm_debugfs_list, DRM_DEBUGFS_ENTRIES, minor);
	232
	233	debugfs_remove(minor->debugfs_root);
	234	minor->debugfs_root = NULL;
	235
	236	return 0;
	237	}
	238
30f65707 TW	239	static int connector_show(struct seq_file m, void data)
	240	{
	241	struct drm_connector *connector = m->private;
	242	const char *status;
	243
	244	switch (connector->force) {
	245	case DRM_FORCE_ON:
	246	status = "on\n";
	247	break;
	248
	249	case DRM_FORCE_ON_DIGITAL:
	250	status = "digital\n";
	251	break;
	252
	253	case DRM_FORCE_OFF:
	254	status = "off\n";
	255	break;
	256
	257	case DRM_FORCE_UNSPECIFIED:
	258	status = "unspecified\n";
	259	break;
	260
	261	default:
	262	return 0;
	263	}
	264
	265	seq_puts(m, status);
	266
	267	return 0;
	268	}
	269
	270	static int connector_open(struct inode inode, struct file file)
	271	{
	272	struct drm_connector *dev = inode->i_private;
	273
	274	return single_open(file, connector_show, dev);
	275	}
	276
	277	static ssize_t connector_write(struct file file, const char __user ubuf,
	278	size_t len, loff_t *offp)
	279	{
	280	struct seq_file *m = file->private_data;
	281	struct drm_connector *connector = m->private;
	282	char buf[12];
	283
	284	if (len > sizeof(buf) - 1)
	285	return -EINVAL;
	286
	287	if (copy_from_user(buf, ubuf, len))
	288	return -EFAULT;
	289
	290	buf[len] = '\0';
	291
	292	if (!strcmp(buf, "on"))
	293	connector->force = DRM_FORCE_ON;
	294	else if (!strcmp(buf, "digital"))
	295	connector->force = DRM_FORCE_ON_DIGITAL;
	296	else if (!strcmp(buf, "off"))
	297	connector->force = DRM_FORCE_OFF;
	298	else if (!strcmp(buf, "unspecified"))
	299	connector->force = DRM_FORCE_UNSPECIFIED;
	300	else
	301	return -EINVAL;
	302
303	return len;
304	}
305
4cf2b281 TW	306	static int edid_show(struct seq_file m, void data)
	307	{
	308	struct drm_connector *connector = m->private;
	309	struct drm_property_blob *edid = connector->edid_blob_ptr;
	310
	311	if (connector->override_edid && edid)
	312	seq_write(m, edid->data, edid->length);
	313
	314	return 0;
	315	}
	316
	317	static int edid_open(struct inode inode, struct file file)
	318	{
	319	struct drm_connector *dev = inode->i_private;
	320
	321	return single_open(file, edid_show, dev);
	322	}
	323
	324	static ssize_t edid_write(struct file file, const char __user ubuf,
	325	size_t len, loff_t *offp)
	326	{
	327	struct seq_file *m = file->private_data;
	328	struct drm_connector *connector = m->private;
	329	char *buf;
	330	struct edid *edid;
	331	int ret;
	332
	333	buf = memdup_user(ubuf, len);
	334	if (IS_ERR(buf))
	335	return PTR_ERR(buf);
	336
	337	edid = (struct edid *) buf;
	338
	339	if (len == 5 && !strncmp(buf, "reset", 5)) {
	340	connector->override_edid = false;
	341	ret = drm_mode_connector_update_edid_property(connector, NULL);
	342	} else if (len < EDID_LENGTH \|\|
	343	EDID_LENGTH * (1 + edid->extensions) > len)
	344	ret = -EINVAL;
	345	else {
	346	connector->override_edid = false;
	347	ret = drm_mode_connector_update_edid_property(connector, edid);
	348	if (!ret)
	349	connector->override_edid = true;
	350	}
	351
	352	kfree(buf);
	353
	354	return (ret) ? ret : len;
	355	}
	356
	357	static const struct file_operations drm_edid_fops = {
	358	.owner = THIS_MODULE,
	359	.open = edid_open,
	360	.read = seq_read,
	361	.llseek = seq_lseek,
	362	.release = single_release,
	363	.write = edid_write
	364	};
	365
	366
30f65707 TW	367	static const struct file_operations drm_connector_fops = {
	368	.owner = THIS_MODULE,
	369	.open = connector_open,
	370	.read = seq_read,
	371	.llseek = seq_lseek,
	372	.release = single_release,
	373	.write = connector_write
	374	};
	375
	376	int drm_debugfs_connector_add(struct drm_connector *connector)
	377	{
	378	struct drm_minor *minor = connector->dev->primary;
	379	struct dentry root, ent;
	380
	381	if (!minor->debugfs_root)
	382	return -1;
	383
	384	root = debugfs_create_dir(connector->name, minor->debugfs_root);
	385	if (!root)
	386	return -ENOMEM;
	387
	388	connector->debugfs_entry = root;
	389
	390	/* force */
	391	ent = debugfs_create_file("force", S_IRUGO \| S_IWUSR, root, connector,
	392	&drm_connector_fops);
	393	if (!ent)
	394	goto error;
	395
4cf2b281 TW	396	/* edid */
	397	ent = debugfs_create_file("edid_override", S_IRUGO \| S_IWUSR, root,
	398	connector, &drm_edid_fops);
	399	if (!ent)
	400	goto error;
	401
30f65707 TW	402	return 0;
	403
	404	error:
	405	debugfs_remove_recursive(connector->debugfs_entry);
	406	connector->debugfs_entry = NULL;
	407	return -ENOMEM;
	408	}
	409
	410	void drm_debugfs_connector_remove(struct drm_connector *connector)
	411	{
	412	if (!connector->debugfs_entry)
	413	return;
	414
	415	debugfs_remove_recursive(connector->debugfs_entry);
	416
	417	connector->debugfs_entry = NULL;
	418	}
	419
28a62277 BG	420	#endif /* CONFIG_DEBUG_FS */
28a62277 BG	421