[linux-2.6-block.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>
#include <drm/drm_atomic.h>
#include "drm_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,
};


/**
 * 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/%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);

/**
 * 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 (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 (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;
	int ret;

	if (!minor->debugfs_root)
		return 0;

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

	if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
		ret = drm_atomic_debugfs_cleanup(minor);
		if (ret) {
			DRM_ERROR("DRM: Failed to remove atomic debugfs entries\n");
			return ret;
		}
	}

	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;
}

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	* \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>
6559c901	39	#include <drm/drm_atomic.h>
67d0ec4e	40	#include "drm_internal.h"
28a62277 BG	41
	42	#if defined(CONFIG_DEBUG_FS)
	43
	44	/***************************************************
	45	* Initialization, etc.
	46	**************************************************/
	47
36f73b2f	48	static const struct drm_info_list drm_debugfs_list[] = {
28a62277	49	{"name", drm_name_info, 0},
28a62277	50	{"clients", drm_clients_info, 0},
28a62277	51	{"gem_names", drm_gem_name_info, DRIVER_GEM},
28a62277 BG	52	};
	53	#define DRM_DEBUGFS_ENTRIES ARRAY_SIZE(drm_debugfs_list)
	54
	55
	56	static int drm_debugfs_open(struct inode inode, struct file file)
	57	{
	58	struct drm_info_node *node = inode->i_private;
	59
	60	return single_open(file, node->info_ent->show, node);
	61	}
	62
	63
	64	static const struct file_operations drm_debugfs_fops = {
	65	.owner = THIS_MODULE,
	66	.open = drm_debugfs_open,
	67	.read = seq_read,
	68	.llseek = seq_lseek,
	69	.release = single_release,
	70	};
	71
	72
	73	/**
	74	* Initialize a given set of debugfs files for a device
	75	*
	76	* \param files The array of files to create
	77	* \param count The number of files given
	78	* \param root DRI debugfs dir entry.
	79	* \param minor device minor number
	80	* \return Zero on success, non-zero on failure
	81	*
	82	* Create a given set of debugfs files represented by an array of
	83	* gdm_debugfs_lists in the given root directory.
	84	*/
7d74795b	85	int drm_debugfs_create_files(const struct drm_info_list *files, int count,
28a62277 BG	86	struct dentry root, struct drm_minor minor)
	87	{
	88	struct drm_device *dev = minor->dev;
	89	struct dentry *ent;
	90	struct drm_info_node *tmp;
28a62277 BG	91	int i, ret;
	92
	93	for (i = 0; i < count; i++) {
	94	u32 features = files[i].driver_features;
	95
	96	if (features != 0 &&
	97	(dev->driver->driver_features & features) != features)
	98	continue;
	99
9a298b2a	100	tmp = kmalloc(sizeof(struct drm_info_node), GFP_KERNEL);
d25e3a6f JS	101	if (tmp == NULL) {
	102	ret = -1;
	103	goto fail;
	104	}
28a62277 BG	105	ent = debugfs_create_file(files[i].name, S_IFREG \| S_IRUGO,
	106	root, tmp, &drm_debugfs_fops);
	107	if (!ent) {
bcd599e7 AV	108	DRM_ERROR("Cannot create /sys/kernel/debug/dri/%pd/%s\n",
bcd599e7 AV	109	root, files[i].name);
9a298b2a	110	kfree(tmp);
28a62277 BG	111	ret = -1;
	112	goto fail;
	113	}
	114
	115	tmp->minor = minor;
	116	tmp->dent = ent;
	117	tmp->info_ent = &files[i];
b3e067c0 MS	118
	119	mutex_lock(&minor->debugfs_lock);
	120	list_add(&tmp->list, &minor->debugfs_list);
	121	mutex_unlock(&minor->debugfs_lock);
28a62277 BG	122	}
	123	return 0;
	124
	125	fail:
	126	drm_debugfs_remove_files(files, count, minor);
	127	return ret;
	128	}
	129	EXPORT_SYMBOL(drm_debugfs_create_files);
	130
	131	/**
	132	* Initialize the DRI debugfs filesystem for a device
	133	*
	134	* \param dev DRM device
	135	* \param minor device minor number
	136	* \param root DRI debugfs dir entry.
	137	*
156f5a78 GL	138	* Create the DRI debugfs root entry "/sys/kernel/debug/dri", the device debugfs root entry
	139	* "/sys/kernel/debug/dri/%minor%/", and each entry in debugfs_list as
	140	* "/sys/kernel/debug/dri/%minor%/%name%".
28a62277 BG	141	*/
	142	int drm_debugfs_init(struct drm_minor *minor, int minor_id,
	143	struct dentry *root)
	144	{
	145	struct drm_device *dev = minor->dev;
	146	char name[64];
	147	int ret;
	148
b3e067c0 MS	149	INIT_LIST_HEAD(&minor->debugfs_list);
b3e067c0 MS	150	mutex_init(&minor->debugfs_lock);
28a62277 BG	151	sprintf(name, "%d", minor_id);
	152	minor->debugfs_root = debugfs_create_dir(name, root);
	153	if (!minor->debugfs_root) {
156f5a78	154	DRM_ERROR("Cannot create /sys/kernel/debug/dri/%s\n", name);
28a62277 BG	155	return -1;
	156	}
	157
	158	ret = drm_debugfs_create_files(drm_debugfs_list, DRM_DEBUGFS_ENTRIES,
	159	minor->debugfs_root, minor);
	160	if (ret) {
	161	debugfs_remove(minor->debugfs_root);
	162	minor->debugfs_root = NULL;
	163	DRM_ERROR("Failed to create core drm debugfs files\n");
	164	return ret;
	165	}
	166
6559c901 RC	167	if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
	168	ret = drm_atomic_debugfs_init(minor);
	169	if (ret) {
	170	DRM_ERROR("Failed to create atomic debugfs files\n");
	171	return ret;
	172	}
	173	}
	174
28a62277 BG	175	if (dev->driver->debugfs_init) {
	176	ret = dev->driver->debugfs_init(minor);
	177	if (ret) {
	178	DRM_ERROR("DRM: Driver failed to initialize "
156f5a78	179	"/sys/kernel/debug/dri.\n");
28a62277 BG	180	return ret;
	181	}
	182	}
	183	return 0;
	184	}
	185
	186
	187	/**
	188	* Remove a list of debugfs files
	189	*
	190	* \param files The list of files
	191	* \param count The number of files
	192	* \param minor The minor of which we should remove the files
	193	* \return always zero.
	194	*
	195	* Remove all debugfs entries created by debugfs_init().
	196	*/
7d74795b	197	int drm_debugfs_remove_files(const struct drm_info_list *files, int count,
28a62277 BG	198	struct drm_minor *minor)
	199	{
	200	struct list_head pos, q;
	201	struct drm_info_node *tmp;
	202	int i;
	203
b3e067c0	204	mutex_lock(&minor->debugfs_lock);
28a62277	205	for (i = 0; i < count; i++) {
b3e067c0	206	list_for_each_safe(pos, q, &minor->debugfs_list) {
28a62277 BG	207	tmp = list_entry(pos, struct drm_info_node, list);
	208	if (tmp->info_ent == &files[i]) {
	209	debugfs_remove(tmp->dent);
	210	list_del(pos);
9a298b2a	211	kfree(tmp);
28a62277 BG	212	}
	213	}
	214	}
b3e067c0	215	mutex_unlock(&minor->debugfs_lock);
28a62277 BG	216	return 0;
	217	}
	218	EXPORT_SYMBOL(drm_debugfs_remove_files);
	219
	220	/**
	221	* Cleanup the debugfs filesystem resources.
	222	*
	223	* \param minor device minor number.
	224	* \return always zero.
	225	*
	226	* Remove all debugfs entries created by debugfs_init().
	227	*/
	228	int drm_debugfs_cleanup(struct drm_minor *minor)
	229	{
	230	struct drm_device *dev = minor->dev;
8c0b55e2	231	int ret;
28a62277 BG	232
	233	if (!minor->debugfs_root)
	234	return 0;
	235
	236	if (dev->driver->debugfs_cleanup)
	237	dev->driver->debugfs_cleanup(minor);
	238
8c0b55e2 LD	239	if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
	240	ret = drm_atomic_debugfs_cleanup(minor);
	241	if (ret) {
	242	DRM_ERROR("DRM: Failed to remove atomic debugfs entries\n");
	243	return ret;
	244	}
	245	}
	246
28a62277 BG	247	drm_debugfs_remove_files(drm_debugfs_list, DRM_DEBUGFS_ENTRIES, minor);
	248
	249	debugfs_remove(minor->debugfs_root);
	250	minor->debugfs_root = NULL;
	251
	252	return 0;
	253	}
	254
30f65707 TW	255	static int connector_show(struct seq_file m, void data)
	256	{
	257	struct drm_connector *connector = m->private;
	258	const char *status;
	259
	260	switch (connector->force) {
	261	case DRM_FORCE_ON:
	262	status = "on\n";
	263	break;
	264
	265	case DRM_FORCE_ON_DIGITAL:
	266	status = "digital\n";
	267	break;
	268
	269	case DRM_FORCE_OFF:
	270	status = "off\n";
	271	break;
	272
	273	case DRM_FORCE_UNSPECIFIED:
	274	status = "unspecified\n";
	275	break;
	276
	277	default:
	278	return 0;
	279	}
	280
	281	seq_puts(m, status);
	282
	283	return 0;
	284	}
	285
	286	static int connector_open(struct inode inode, struct file file)
	287	{
	288	struct drm_connector *dev = inode->i_private;
	289
	290	return single_open(file, connector_show, dev);
	291	}
	292
	293	static ssize_t connector_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[12];
	299
	300	if (len > sizeof(buf) - 1)
	301	return -EINVAL;
	302
	303	if (copy_from_user(buf, ubuf, len))
	304	return -EFAULT;
	305
	306	buf[len] = '\0';
	307
	308	if (!strcmp(buf, "on"))
	309	connector->force = DRM_FORCE_ON;
	310	else if (!strcmp(buf, "digital"))
	311	connector->force = DRM_FORCE_ON_DIGITAL;
	312	else if (!strcmp(buf, "off"))
	313	connector->force = DRM_FORCE_OFF;
	314	else if (!strcmp(buf, "unspecified"))
	315	connector->force = DRM_FORCE_UNSPECIFIED;
	316	else
	317	return -EINVAL;
	318
319	return len;
320	}
321
4cf2b281 TW	322	static int edid_show(struct seq_file m, void data)
	323	{
	324	struct drm_connector *connector = m->private;
	325	struct drm_property_blob *edid = connector->edid_blob_ptr;
	326
	327	if (connector->override_edid && edid)
	328	seq_write(m, edid->data, edid->length);
	329
	330	return 0;
	331	}
	332
	333	static int edid_open(struct inode inode, struct file file)
	334	{
	335	struct drm_connector *dev = inode->i_private;
	336
	337	return single_open(file, edid_show, dev);
	338	}
	339
	340	static ssize_t edid_write(struct file file, const char __user ubuf,
	341	size_t len, loff_t *offp)
	342	{
	343	struct seq_file *m = file->private_data;
	344	struct drm_connector *connector = m->private;
	345	char *buf;
	346	struct edid *edid;
	347	int ret;
	348
	349	buf = memdup_user(ubuf, len);
	350	if (IS_ERR(buf))
	351	return PTR_ERR(buf);
	352
	353	edid = (struct edid *) buf;
	354
	355	if (len == 5 && !strncmp(buf, "reset", 5)) {
	356	connector->override_edid = false;
	357	ret = drm_mode_connector_update_edid_property(connector, NULL);
	358	} else if (len < EDID_LENGTH \|\|
	359	EDID_LENGTH * (1 + edid->extensions) > len)
	360	ret = -EINVAL;
	361	else {
	362	connector->override_edid = false;
	363	ret = drm_mode_connector_update_edid_property(connector, edid);
	364	if (!ret)
	365	connector->override_edid = true;
	366	}
	367
	368	kfree(buf);
	369
	370	return (ret) ? ret : len;
	371	}
	372
	373	static const struct file_operations drm_edid_fops = {
	374	.owner = THIS_MODULE,
	375	.open = edid_open,
	376	.read = seq_read,
	377	.llseek = seq_lseek,
	378	.release = single_release,
	379	.write = edid_write
	380	};
	381
	382
30f65707 TW	383	static const struct file_operations drm_connector_fops = {
	384	.owner = THIS_MODULE,
	385	.open = connector_open,
	386	.read = seq_read,
	387	.llseek = seq_lseek,
	388	.release = single_release,
	389	.write = connector_write
	390	};
	391
	392	int drm_debugfs_connector_add(struct drm_connector *connector)
	393	{
	394	struct drm_minor *minor = connector->dev->primary;
	395	struct dentry root, ent;
	396
	397	if (!minor->debugfs_root)
	398	return -1;
	399
	400	root = debugfs_create_dir(connector->name, minor->debugfs_root);
	401	if (!root)
	402	return -ENOMEM;
	403
	404	connector->debugfs_entry = root;
	405
	406	/* force */
	407	ent = debugfs_create_file("force", S_IRUGO \| S_IWUSR, root, connector,
	408	&drm_connector_fops);
	409	if (!ent)
	410	goto error;
	411
4cf2b281 TW	412	/* edid */
	413	ent = debugfs_create_file("edid_override", S_IRUGO \| S_IWUSR, root,
	414	connector, &drm_edid_fops);
	415	if (!ent)
	416	goto error;
	417
30f65707 TW	418	return 0;
	419
	420	error:
	421	debugfs_remove_recursive(connector->debugfs_entry);
	422	connector->debugfs_entry = NULL;
	423	return -ENOMEM;
	424	}
	425
	426	void drm_debugfs_connector_remove(struct drm_connector *connector)
	427	{
	428	if (!connector->debugfs_entry)
	429	return;
	430
	431	debugfs_remove_recursive(connector->debugfs_entry);
	432
	433	connector->debugfs_entry = NULL;
	434	}
	435
9edbf1fa TV	436	int drm_debugfs_crtc_add(struct drm_crtc *crtc)
	437	{
	438	struct drm_minor *minor = crtc->dev->primary;
	439	struct dentry *root;
	440	char *name;
	441
	442	name = kasprintf(GFP_KERNEL, "crtc-%d", crtc->index);
	443	if (!name)
	444	return -ENOMEM;
	445
	446	root = debugfs_create_dir(name, minor->debugfs_root);
	447	kfree(name);
	448	if (!root)
	449	return -ENOMEM;
	450
	451	crtc->debugfs_entry = root;
	452
	453	if (drm_debugfs_crtc_crc_add(crtc))
	454	goto error;
28a62277	455
9edbf1fa TV	456	return 0;
	457
	458	error:
	459	drm_debugfs_crtc_remove(crtc);
	460	return -ENOMEM;
	461	}
	462
	463	void drm_debugfs_crtc_remove(struct drm_crtc *crtc)
	464	{
	465	debugfs_remove_recursive(crtc->debugfs_entry);
	466	crtc->debugfs_entry = NULL;
	467	}
	468
	469	#endif /* CONFIG_DEBUG_FS */