[mirror_ubuntu-artful-kernel.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"
#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,
};


/**
 * 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
 * &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);

/**
 * 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);

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);
}

/**
 * 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_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	* \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"
5bc9cb4d	41	#include "drm_crtc_internal.h"
28a62277 BG	42
	43	#if defined(CONFIG_DEBUG_FS)
	44
	45	/***************************************************
	46	* Initialization, etc.
	47	**************************************************/
	48
36f73b2f	49	static const struct drm_info_list drm_debugfs_list[] = {
28a62277	50	{"name", drm_name_info, 0},
28a62277	51	{"clients", drm_clients_info, 0},
28a62277	52	{"gem_names", drm_gem_name_info, DRIVER_GEM},
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
086f2e5c NT	84	* &drm_info_list in the given root directory. These files will be removed
086f2e5c NT	85	* automatically on drm_debugfs_cleanup().
28a62277	86	*/
7d74795b	87	int drm_debugfs_create_files(const struct drm_info_list *files, int count,
28a62277 BG	88	struct dentry root, struct drm_minor minor)
	89	{
	90	struct drm_device *dev = minor->dev;
	91	struct dentry *ent;
	92	struct drm_info_node *tmp;
28a62277 BG	93	int i, ret;
	94
	95	for (i = 0; i < count; i++) {
	96	u32 features = files[i].driver_features;
	97
	98	if (features != 0 &&
	99	(dev->driver->driver_features & features) != features)
	100	continue;
	101
9a298b2a	102	tmp = kmalloc(sizeof(struct drm_info_node), GFP_KERNEL);
d25e3a6f JS	103	if (tmp == NULL) {
	104	ret = -1;
	105	goto fail;
	106	}
28a62277 BG	107	ent = debugfs_create_file(files[i].name, S_IFREG \| S_IRUGO,
	108	root, tmp, &drm_debugfs_fops);
	109	if (!ent) {
bcd599e7 AV	110	DRM_ERROR("Cannot create /sys/kernel/debug/dri/%pd/%s\n",
bcd599e7 AV	111	root, files[i].name);
9a298b2a	112	kfree(tmp);
28a62277 BG	113	ret = -1;
	114	goto fail;
	115	}
	116
	117	tmp->minor = minor;
	118	tmp->dent = ent;
	119	tmp->info_ent = &files[i];
b3e067c0 MS	120
	121	mutex_lock(&minor->debugfs_lock);
	122	list_add(&tmp->list, &minor->debugfs_list);
	123	mutex_unlock(&minor->debugfs_lock);
28a62277 BG	124	}
	125	return 0;
	126
	127	fail:
	128	drm_debugfs_remove_files(files, count, minor);
	129	return ret;
	130	}
	131	EXPORT_SYMBOL(drm_debugfs_create_files);
	132
	133	/**
	134	* Initialize the DRI debugfs filesystem for a device
	135	*
	136	* \param dev DRM device
	137	* \param minor device minor number
	138	* \param root DRI debugfs dir entry.
	139	*
156f5a78 GL	140	* Create the DRI debugfs root entry "/sys/kernel/debug/dri", the device debugfs root entry
	141	* "/sys/kernel/debug/dri/%minor%/", and each entry in debugfs_list as
	142	* "/sys/kernel/debug/dri/%minor%/%name%".
28a62277 BG	143	*/
	144	int drm_debugfs_init(struct drm_minor *minor, int minor_id,
	145	struct dentry *root)
	146	{
	147	struct drm_device *dev = minor->dev;
	148	char name[64];
	149	int ret;
	150
b3e067c0 MS	151	INIT_LIST_HEAD(&minor->debugfs_list);
b3e067c0 MS	152	mutex_init(&minor->debugfs_lock);
28a62277 BG	153	sprintf(name, "%d", minor_id);
	154	minor->debugfs_root = debugfs_create_dir(name, root);
	155	if (!minor->debugfs_root) {
156f5a78	156	DRM_ERROR("Cannot create /sys/kernel/debug/dri/%s\n", name);
28a62277 BG	157	return -1;
	158	}
	159
	160	ret = drm_debugfs_create_files(drm_debugfs_list, DRM_DEBUGFS_ENTRIES,
	161	minor->debugfs_root, minor);
	162	if (ret) {
	163	debugfs_remove(minor->debugfs_root);
	164	minor->debugfs_root = NULL;
	165	DRM_ERROR("Failed to create core drm debugfs files\n");
	166	return ret;
	167	}
	168
6559c901 RC	169	if (drm_core_check_feature(dev, DRIVER_ATOMIC)) {
	170	ret = drm_atomic_debugfs_init(minor);
	171	if (ret) {
	172	DRM_ERROR("Failed to create atomic debugfs files\n");
	173	return ret;
	174	}
	175	}
	176
28a62277 BG	177	if (dev->driver->debugfs_init) {
	178	ret = dev->driver->debugfs_init(minor);
	179	if (ret) {
	180	DRM_ERROR("DRM: Driver failed to initialize "
156f5a78	181	"/sys/kernel/debug/dri.\n");
28a62277 BG	182	return ret;
	183	}
	184	}
	185	return 0;
	186	}
	187
	188
	189	/**
	190	* Remove a list of debugfs files
	191	*
	192	* \param files The list of files
	193	* \param count The number of files
	194	* \param minor The minor of which we should remove the files
	195	* \return always zero.
	196	*
	197	* Remove all debugfs entries created by debugfs_init().
	198	*/
7d74795b	199	int drm_debugfs_remove_files(const struct drm_info_list *files, int count,
28a62277 BG	200	struct drm_minor *minor)
	201	{
	202	struct list_head pos, q;
	203	struct drm_info_node *tmp;
	204	int i;
	205
b3e067c0	206	mutex_lock(&minor->debugfs_lock);
28a62277	207	for (i = 0; i < count; i++) {
b3e067c0	208	list_for_each_safe(pos, q, &minor->debugfs_list) {
28a62277 BG	209	tmp = list_entry(pos, struct drm_info_node, list);
	210	if (tmp->info_ent == &files[i]) {
	211	debugfs_remove(tmp->dent);
	212	list_del(pos);
9a298b2a	213	kfree(tmp);
28a62277 BG	214	}
	215	}
	216	}
b3e067c0	217	mutex_unlock(&minor->debugfs_lock);
28a62277 BG	218	return 0;
	219	}
	220	EXPORT_SYMBOL(drm_debugfs_remove_files);
	221
086f2e5c NT	222	static void drm_debugfs_remove_all_files(struct drm_minor *minor)
	223	{
	224	struct drm_info_node node, tmp;
	225
	226	mutex_lock(&minor->debugfs_lock);
	227	list_for_each_entry_safe(node, tmp, &minor->debugfs_list, list) {
	228	debugfs_remove(node->dent);
	229	list_del(&node->list);
	230	kfree(node);
	231	}
	232	mutex_unlock(&minor->debugfs_lock);
	233	}
	234
28a62277 BG	235	/**
	236	* Cleanup the debugfs filesystem resources.
	237	*
	238	* \param minor device minor number.
	239	* \return always zero.
	240	*
	241	* Remove all debugfs entries created by debugfs_init().
	242	*/
	243	int drm_debugfs_cleanup(struct drm_minor *minor)
	244	{
	245	struct drm_device *dev = minor->dev;
	246
	247	if (!minor->debugfs_root)
	248	return 0;
	249
	250	if (dev->driver->debugfs_cleanup)
	251	dev->driver->debugfs_cleanup(minor);
	252
086f2e5c	253	drm_debugfs_remove_all_files(minor);
28a62277	254
086f2e5c	255	debugfs_remove_recursive(minor->debugfs_root);
28a62277 BG	256	minor->debugfs_root = NULL;
	257
	258	return 0;
	259	}
	260
30f65707 TW	261	static int connector_show(struct seq_file m, void data)
	262	{
	263	struct drm_connector *connector = m->private;
30f65707	264
6140cf20	265	seq_printf(m, "%s\n", drm_get_connector_force_name(connector->force));
30f65707 TW	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
9edbf1fa TV	420	int drm_debugfs_crtc_add(struct drm_crtc *crtc)
	421	{
	422	struct drm_minor *minor = crtc->dev->primary;
	423	struct dentry *root;
	424	char *name;
	425
	426	name = kasprintf(GFP_KERNEL, "crtc-%d", crtc->index);
	427	if (!name)
	428	return -ENOMEM;
	429
	430	root = debugfs_create_dir(name, minor->debugfs_root);
	431	kfree(name);
	432	if (!root)
	433	return -ENOMEM;
	434
	435	crtc->debugfs_entry = root;
	436
	437	if (drm_debugfs_crtc_crc_add(crtc))
	438	goto error;
28a62277	439
9edbf1fa TV	440	return 0;
	441
	442	error:
	443	drm_debugfs_crtc_remove(crtc);
	444	return -ENOMEM;
	445	}
	446
	447	void drm_debugfs_crtc_remove(struct drm_crtc *crtc)
	448	{
	449	debugfs_remove_recursive(crtc->debugfs_entry);
	450	crtc->debugfs_entry = NULL;
	451	}
	452
	453	#endif /* CONFIG_DEBUG_FS */