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

/*
 * Created: Sun Dec 21 13:08:50 2008 by [email protected]
 *
 * Copyright 2008 Ben Gamari <[email protected]>
 *
 * 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_client.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_drv_uses_atomic_modeset(dev)) {
		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;
		}

		ret = drm_client_debugfs_init(minor);
		if (ret) {
			DRM_ERROR("Failed to create client 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_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_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 [email protected]
	3	*
	4	* Copyright 2008 Ben Gamari <[email protected]>
	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	30
e896c132	31	#include <drm/drm_client.h>
4834442d	32	#include <drm/drm_debugfs.h>
4cf2b281	33	#include <drm/drm_edid.h>
6559c901	34	#include <drm/drm_atomic.h>
4834442d SV	35	#include <drm/drmP.h>
4834442d SV	36
67d0ec4e	37	#include "drm_internal.h"
5bc9cb4d	38	#include "drm_crtc_internal.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	47	{"name", drm_name_info, 0},
28a62277	48	{"clients", drm_clients_info, 0},
28a62277	49	{"gem_names", drm_gem_name_info, DRIVER_GEM},
28a62277 BG	50	};
	51	#define DRM_DEBUGFS_ENTRIES ARRAY_SIZE(drm_debugfs_list)
	52
	53
	54	static int drm_debugfs_open(struct inode inode, struct file file)
	55	{
	56	struct drm_info_node *node = inode->i_private;
	57
	58	return single_open(file, node->info_ent->show, node);
	59	}
	60
	61
	62	static const struct file_operations drm_debugfs_fops = {
	63	.owner = THIS_MODULE,
	64	.open = drm_debugfs_open,
	65	.read = seq_read,
	66	.llseek = seq_lseek,
	67	.release = single_release,
	68	};
	69
	70
	71	/**
0cad7f71 SV	72	* drm_debugfs_create_files - Initialize a given set of debugfs files for DRM
	73	* minor
	74	* @files: The array of files to create
	75	* @count: The number of files given
	76	* @root: DRI debugfs dir entry.
	77	* @minor: device minor number
28a62277 BG	78	*
28a62277 BG	79	* Create a given set of debugfs files represented by an array of
0cad7f71	80	* &struct drm_info_list in the given root directory. These files will be removed
086f2e5c	81	* automatically on drm_debugfs_cleanup().
28a62277	82	*/
7d74795b	83	int drm_debugfs_create_files(const struct drm_info_list *files, int count,
28a62277 BG	84	struct dentry root, struct drm_minor minor)
	85	{
	86	struct drm_device *dev = minor->dev;
	87	struct dentry *ent;
	88	struct drm_info_node *tmp;
28a62277 BG	89	int i, ret;
	90
	91	for (i = 0; i < count; i++) {
	92	u32 features = files[i].driver_features;
	93
	94	if (features != 0 &&
	95	(dev->driver->driver_features & features) != features)
	96	continue;
	97
9a298b2a	98	tmp = kmalloc(sizeof(struct drm_info_node), GFP_KERNEL);
d25e3a6f JS	99	if (tmp == NULL) {
	100	ret = -1;
	101	goto fail;
	102	}
28a62277 BG	103	ent = debugfs_create_file(files[i].name, S_IFREG \| S_IRUGO,
	104	root, tmp, &drm_debugfs_fops);
	105	if (!ent) {
bcd599e7 AV	106	DRM_ERROR("Cannot create /sys/kernel/debug/dri/%pd/%s\n",
bcd599e7 AV	107	root, files[i].name);
9a298b2a	108	kfree(tmp);
28a62277 BG	109	ret = -1;
	110	goto fail;
	111	}
	112
	113	tmp->minor = minor;
	114	tmp->dent = ent;
	115	tmp->info_ent = &files[i];
b3e067c0 MS	116
	117	mutex_lock(&minor->debugfs_lock);
	118	list_add(&tmp->list, &minor->debugfs_list);
	119	mutex_unlock(&minor->debugfs_lock);
28a62277 BG	120	}
	121	return 0;
	122
	123	fail:
	124	drm_debugfs_remove_files(files, count, minor);
	125	return ret;
	126	}
	127	EXPORT_SYMBOL(drm_debugfs_create_files);
	128
28a62277 BG	129	int drm_debugfs_init(struct drm_minor *minor, int minor_id,
	130	struct dentry *root)
	131	{
	132	struct drm_device *dev = minor->dev;
	133	char name[64];
	134	int ret;
	135
b3e067c0 MS	136	INIT_LIST_HEAD(&minor->debugfs_list);
b3e067c0 MS	137	mutex_init(&minor->debugfs_lock);
28a62277 BG	138	sprintf(name, "%d", minor_id);
	139	minor->debugfs_root = debugfs_create_dir(name, root);
	140	if (!minor->debugfs_root) {
156f5a78	141	DRM_ERROR("Cannot create /sys/kernel/debug/dri/%s\n", name);
28a62277 BG	142	return -1;
	143	}
	144
	145	ret = drm_debugfs_create_files(drm_debugfs_list, DRM_DEBUGFS_ENTRIES,
	146	minor->debugfs_root, minor);
	147	if (ret) {
	148	debugfs_remove(minor->debugfs_root);
	149	minor->debugfs_root = NULL;
	150	DRM_ERROR("Failed to create core drm debugfs files\n");
	151	return ret;
	152	}
	153
3c499ea0	154	if (drm_drv_uses_atomic_modeset(dev)) {
6559c901 RC	155	ret = drm_atomic_debugfs_init(minor);
	156	if (ret) {
	157	DRM_ERROR("Failed to create atomic debugfs files\n");
	158	return ret;
	159	}
	160	}
	161
0c51ef86 NT	162	if (drm_core_check_feature(dev, DRIVER_MODESET)) {
	163	ret = drm_framebuffer_debugfs_init(minor);
	164	if (ret) {
	165	DRM_ERROR("Failed to create framebuffer debugfs file\n");
	166	return ret;
	167	}
e896c132 NT	168
	169	ret = drm_client_debugfs_init(minor);
	170	if (ret) {
	171	DRM_ERROR("Failed to create client debugfs file\n");
	172	return ret;
	173	}
45d58b40 NT	174	}
45d58b40 NT	175
28a62277 BG	176	if (dev->driver->debugfs_init) {
	177	ret = dev->driver->debugfs_init(minor);
	178	if (ret) {
	179	DRM_ERROR("DRM: Driver failed to initialize "
156f5a78	180	"/sys/kernel/debug/dri.\n");
28a62277 BG	181	return ret;
	182	}
	183	}
	184	return 0;
	185	}
	186
	187
7d74795b	188	int drm_debugfs_remove_files(const struct drm_info_list *files, int count,
28a62277 BG	189	struct drm_minor *minor)
	190	{
	191	struct list_head pos, q;
	192	struct drm_info_node *tmp;
	193	int i;
	194
b3e067c0	195	mutex_lock(&minor->debugfs_lock);
28a62277	196	for (i = 0; i < count; i++) {
b3e067c0	197	list_for_each_safe(pos, q, &minor->debugfs_list) {
28a62277 BG	198	tmp = list_entry(pos, struct drm_info_node, list);
	199	if (tmp->info_ent == &files[i]) {
	200	debugfs_remove(tmp->dent);
	201	list_del(pos);
9a298b2a	202	kfree(tmp);
28a62277 BG	203	}
	204	}
	205	}
b3e067c0	206	mutex_unlock(&minor->debugfs_lock);
28a62277 BG	207	return 0;
	208	}
	209	EXPORT_SYMBOL(drm_debugfs_remove_files);
	210
086f2e5c NT	211	static void drm_debugfs_remove_all_files(struct drm_minor *minor)
	212	{
	213	struct drm_info_node node, tmp;
	214
	215	mutex_lock(&minor->debugfs_lock);
	216	list_for_each_entry_safe(node, tmp, &minor->debugfs_list, list) {
	217	debugfs_remove(node->dent);
	218	list_del(&node->list);
	219	kfree(node);
	220	}
	221	mutex_unlock(&minor->debugfs_lock);
	222	}
	223
28a62277 BG	224	int drm_debugfs_cleanup(struct drm_minor *minor)
28a62277 BG	225	{
28a62277 BG	226	if (!minor->debugfs_root)
	227	return 0;
	228
086f2e5c	229	drm_debugfs_remove_all_files(minor);
28a62277	230
086f2e5c	231	debugfs_remove_recursive(minor->debugfs_root);
28a62277 BG	232	minor->debugfs_root = NULL;
	233
	234	return 0;
	235	}
	236
30f65707 TW	237	static int connector_show(struct seq_file m, void data)
	238	{
	239	struct drm_connector *connector = m->private;
30f65707	240
6140cf20	241	seq_printf(m, "%s\n", drm_get_connector_force_name(connector->force));
30f65707 TW	242
	243	return 0;
	244	}
	245
	246	static int connector_open(struct inode inode, struct file file)
	247	{
	248	struct drm_connector *dev = inode->i_private;
	249
	250	return single_open(file, connector_show, dev);
	251	}
	252
	253	static ssize_t connector_write(struct file file, const char __user ubuf,
	254	size_t len, loff_t *offp)
	255	{
	256	struct seq_file *m = file->private_data;
	257	struct drm_connector *connector = m->private;
	258	char buf[12];
	259
	260	if (len > sizeof(buf) - 1)
	261	return -EINVAL;
	262
	263	if (copy_from_user(buf, ubuf, len))
	264	return -EFAULT;
	265
	266	buf[len] = '\0';
	267
	268	if (!strcmp(buf, "on"))
	269	connector->force = DRM_FORCE_ON;
	270	else if (!strcmp(buf, "digital"))
	271	connector->force = DRM_FORCE_ON_DIGITAL;
	272	else if (!strcmp(buf, "off"))
	273	connector->force = DRM_FORCE_OFF;
	274	else if (!strcmp(buf, "unspecified"))
	275	connector->force = DRM_FORCE_UNSPECIFIED;
	276	else
	277	return -EINVAL;
	278
	279	return len;
	280	}
	281
4cf2b281 TW	282	static int edid_show(struct seq_file m, void data)
	283	{
	284	struct drm_connector *connector = m->private;
	285	struct drm_property_blob *edid = connector->edid_blob_ptr;
	286
	287	if (connector->override_edid && edid)
	288	seq_write(m, edid->data, edid->length);
	289
	290	return 0;
	291	}
	292
	293	static int edid_open(struct inode inode, struct file file)
	294	{
	295	struct drm_connector *dev = inode->i_private;
	296
	297	return single_open(file, edid_show, dev);
	298	}
	299
	300	static ssize_t edid_write(struct file file, const char __user ubuf,
	301	size_t len, loff_t *offp)
	302	{
	303	struct seq_file *m = file->private_data;
	304	struct drm_connector *connector = m->private;
	305	char *buf;
	306	struct edid *edid;
	307	int ret;
	308
	309	buf = memdup_user(ubuf, len);
	310	if (IS_ERR(buf))
	311	return PTR_ERR(buf);
	312
	313	edid = (struct edid *) buf;
	314
	315	if (len == 5 && !strncmp(buf, "reset", 5)) {
	316	connector->override_edid = false;
c555f023	317	ret = drm_connector_update_edid_property(connector, NULL);
4cf2b281 TW	318	} else if (len < EDID_LENGTH \|\|
	319	EDID_LENGTH * (1 + edid->extensions) > len)
	320	ret = -EINVAL;
	321	else {
	322	connector->override_edid = false;
c555f023	323	ret = drm_connector_update_edid_property(connector, edid);
4cf2b281 TW	324	if (!ret)
	325	connector->override_edid = true;
	326	}
	327
	328	kfree(buf);
	329
	330	return (ret) ? ret : len;
	331	}
	332
	333	static const struct file_operations drm_edid_fops = {
	334	.owner = THIS_MODULE,
	335	.open = edid_open,
	336	.read = seq_read,
	337	.llseek = seq_lseek,
	338	.release = single_release,
	339	.write = edid_write
	340	};
	341
	342
30f65707 TW	343	static const struct file_operations drm_connector_fops = {
	344	.owner = THIS_MODULE,
	345	.open = connector_open,
	346	.read = seq_read,
	347	.llseek = seq_lseek,
	348	.release = single_release,
	349	.write = connector_write
	350	};
	351
	352	int drm_debugfs_connector_add(struct drm_connector *connector)
	353	{
	354	struct drm_minor *minor = connector->dev->primary;
	355	struct dentry root, ent;
	356
	357	if (!minor->debugfs_root)
	358	return -1;
	359
	360	root = debugfs_create_dir(connector->name, minor->debugfs_root);
	361	if (!root)
	362	return -ENOMEM;
	363
	364	connector->debugfs_entry = root;
	365
	366	/* force */
	367	ent = debugfs_create_file("force", S_IRUGO \| S_IWUSR, root, connector,
	368	&drm_connector_fops);
	369	if (!ent)
	370	goto error;
	371
4cf2b281 TW	372	/* edid */
	373	ent = debugfs_create_file("edid_override", S_IRUGO \| S_IWUSR, root,
	374	connector, &drm_edid_fops);
	375	if (!ent)
	376	goto error;
	377
30f65707 TW	378	return 0;
	379
	380	error:
	381	debugfs_remove_recursive(connector->debugfs_entry);
	382	connector->debugfs_entry = NULL;
	383	return -ENOMEM;
	384	}
	385
	386	void drm_debugfs_connector_remove(struct drm_connector *connector)
	387	{
	388	if (!connector->debugfs_entry)
	389	return;
	390
	391	debugfs_remove_recursive(connector->debugfs_entry);
	392
	393	connector->debugfs_entry = NULL;
	394	}
	395
9edbf1fa TV	396	int drm_debugfs_crtc_add(struct drm_crtc *crtc)
	397	{
	398	struct drm_minor *minor = crtc->dev->primary;
	399	struct dentry *root;
	400	char *name;
	401
	402	name = kasprintf(GFP_KERNEL, "crtc-%d", crtc->index);
	403	if (!name)
	404	return -ENOMEM;
	405
	406	root = debugfs_create_dir(name, minor->debugfs_root);
	407	kfree(name);
	408	if (!root)
	409	return -ENOMEM;
	410
	411	crtc->debugfs_entry = root;
	412
	413	if (drm_debugfs_crtc_crc_add(crtc))
	414	goto error;
28a62277	415
9edbf1fa TV	416	return 0;
	417
	418	error:
	419	drm_debugfs_crtc_remove(crtc);
	420	return -ENOMEM;
	421	}
	422
	423	void drm_debugfs_crtc_remove(struct drm_crtc *crtc)
	424	{
	425	debugfs_remove_recursive(crtc->debugfs_entry);
	426	crtc->debugfs_entry = NULL;
	427	}
	428
	429	#endif /* CONFIG_DEBUG_FS */