/*
 * 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/export.h>
#include <linux/seq_file.h>
#include <linux/slab.h>
#include <linux/uaccess.h>

#include <drm/drm_atomic.h>
#include <drm/drm_auth.h>
#include <drm/drm_bridge.h>
#include <drm/drm_debugfs.h>
#include <drm/drm_device.h>
#include <drm/drm_drv.h>
#include <drm/drm_edid.h>
#include <drm/drm_file.h>
#include <drm/drm_gem.h>
#include <drm/drm_managed.h>
#include <drm/drm_gpuvm.h>

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

static struct dentry *accel_debugfs_root;
static struct dentry *drm_debugfs_root;

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

static int drm_name_info(struct seq_file *m, void *data)
{
        struct drm_debugfs_entry *entry = m->private;
        struct drm_device *dev = entry->dev;
        struct drm_master *master;

        mutex_lock(&dev->master_mutex);
        master = dev->master;
        seq_printf(m, "%s", dev->driver->name);
        if (dev->dev)
                seq_printf(m, " dev=%s", dev_name(dev->dev));
        if (master && master->unique)
                seq_printf(m, " master=%s", master->unique);
        if (dev->unique)
                seq_printf(m, " unique=%s", dev->unique);
        seq_printf(m, "\n");
        mutex_unlock(&dev->master_mutex);

        return 0;
}

static int drm_clients_info(struct seq_file *m, void *data)
{
        struct drm_debugfs_entry *entry = m->private;
        struct drm_device *dev = entry->dev;
        struct drm_file *priv;
        kuid_t uid;

        seq_printf(m,
                   "%20s %5s %3s master a %5s %10s %*s %20s\n",
                   "command",
                   "tgid",
                   "dev",
                   "uid",
                   "magic",
                   DRM_CLIENT_NAME_MAX_LEN,
                   "name",
                   "id");

        /* dev->filelist is sorted youngest first, but we want to present
         * oldest first (i.e. kernel, servers, clients), so walk backwardss.
         */
        mutex_lock(&dev->filelist_mutex);
        list_for_each_entry_reverse(priv, &dev->filelist, lhead) {
                bool is_current_master = drm_is_current_master(priv);
                struct task_struct *task;
                struct pid *pid;

                mutex_lock(&priv->client_name_lock);
                rcu_read_lock(); /* Locks priv->pid and pid_task()->comm! */
                pid = rcu_dereference(priv->pid);
                task = pid_task(pid, PIDTYPE_TGID);
                uid = task ? __task_cred(task)->euid : GLOBAL_ROOT_UID;
                seq_printf(m, "%20s %5d %3d   %c    %c %5d %10u %*s %20llu\n",
                           task ? task->comm : "<unknown>",
                           pid_vnr(pid),
                           priv->minor->index,
                           is_current_master ? 'y' : 'n',
                           priv->authenticated ? 'y' : 'n',
                           from_kuid_munged(seq_user_ns(m), uid),
                           priv->magic,
                           DRM_CLIENT_NAME_MAX_LEN,
                           priv->client_name ? priv->client_name : "<unset>",
                           priv->client_id);
                rcu_read_unlock();
                mutex_unlock(&priv->client_name_lock);
        }
        mutex_unlock(&dev->filelist_mutex);
        return 0;
}

static int drm_gem_one_name_info(int id, void *ptr, void *data)
{
        struct drm_gem_object *obj = ptr;
        struct seq_file *m = data;

        seq_printf(m, "%6d %8zd %7d %8d\n",
                   obj->name, obj->size,
                   obj->handle_count,
                   kref_read(&obj->refcount));
        return 0;
}

static int drm_gem_name_info(struct seq_file *m, void *data)
{
        struct drm_debugfs_entry *entry = m->private;
        struct drm_device *dev = entry->dev;

        seq_printf(m, "  name     size handles refcount\n");

        mutex_lock(&dev->object_name_lock);
        idr_for_each(&dev->object_name_idr, drm_gem_one_name_info, m);
        mutex_unlock(&dev->object_name_lock);

        return 0;
}

static const struct drm_debugfs_info 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;

        if (!device_is_registered(node->minor->kdev))
                return -ENODEV;

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

static int drm_debugfs_entry_open(struct inode *inode, struct file *file)
{
        struct drm_debugfs_entry *entry = inode->i_private;
        struct drm_debugfs_info *node = &entry->file;
        struct drm_minor *minor = entry->dev->primary ?: entry->dev->accel;

        if (!device_is_registered(minor->kdev))
                return -ENODEV;

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

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

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_gpuva_info - dump the given DRM GPU VA space
 * @m: pointer to the &seq_file to write
 * @gpuvm: the &drm_gpuvm representing the GPU VA space
 *
 * Dumps the GPU VA mappings of a given DRM GPU VA manager.
 *
 * For each DRM GPU VA space drivers should call this function from their
 * &drm_info_list's show callback.
 *
 * Returns: 0 on success, -ENODEV if the &gpuvm is not initialized
 */
int drm_debugfs_gpuva_info(struct seq_file *m,
                           struct drm_gpuvm *gpuvm)
{
        struct drm_gpuva *va, *kva = &gpuvm->kernel_alloc_node;

        if (!gpuvm->name)
                return -ENODEV;

        seq_printf(m, "DRM GPU VA space (%s) [0x%016llx;0x%016llx]\n",
                   gpuvm->name, gpuvm->mm_start, gpuvm->mm_start + gpuvm->mm_range);
        seq_printf(m, "Kernel reserved node [0x%016llx;0x%016llx]\n",
                   kva->va.addr, kva->va.addr + kva->va.range);
        seq_puts(m, "\n");
        seq_puts(m, " VAs | start              | range              | end                | object             | object offset\n");
        seq_puts(m, "-------------------------------------------------------------------------------------------------------------\n");
        drm_gpuvm_for_each_va(va, gpuvm) {
                if (unlikely(va == kva))
                        continue;

                seq_printf(m, "     | 0x%016llx | 0x%016llx | 0x%016llx | 0x%016llx | 0x%016llx\n",
                           va->va.addr, va->va.range, va->va.addr + va->va.range,
                           (u64)(uintptr_t)va->gem.obj, va->gem.offset);
        }

        return 0;
}
EXPORT_SYMBOL(drm_debugfs_gpuva_info);

/**
 * 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_dev_fini().
 */
void 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 drm_info_node *tmp;
        int i;

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

                if (features && !drm_core_check_all_features(dev, features))
                        continue;

                tmp = drmm_kzalloc(dev, sizeof(*tmp), GFP_KERNEL);
                if (tmp == NULL)
                        continue;

                tmp->minor = minor;
                tmp->dent = debugfs_create_file(files[i].name,
                                                0444, root, tmp,
                                                &drm_debugfs_fops);
                tmp->info_ent = &files[i];
        }
}
EXPORT_SYMBOL(drm_debugfs_create_files);

int drm_debugfs_remove_files(const struct drm_info_list *files, int count,
                             struct dentry *root, struct drm_minor *minor)
{
        int i;

        for (i = 0; i < count; i++) {
                struct dentry *dent = debugfs_lookup(files[i].name, root);

                if (!dent)
                        continue;

                drmm_kfree(minor->dev, d_inode(dent)->i_private);
                debugfs_remove(dent);
        }
        return 0;
}
EXPORT_SYMBOL(drm_debugfs_remove_files);

void drm_debugfs_bridge_params(void)
{
        drm_bridge_debugfs_params(drm_debugfs_root);
}

void drm_debugfs_init_root(void)
{
        drm_debugfs_root = debugfs_create_dir("dri", NULL);
#if IS_ENABLED(CONFIG_DRM_ACCEL)
        accel_debugfs_root = debugfs_create_dir("accel", NULL);
#endif
}

void drm_debugfs_remove_root(void)
{
#if IS_ENABLED(CONFIG_DRM_ACCEL)
        debugfs_remove(accel_debugfs_root);
#endif
        debugfs_remove(drm_debugfs_root);
}

static int drm_debugfs_proc_info_show(struct seq_file *m, void *unused)
{
        struct pid *pid;
        struct task_struct *task;
        struct drm_file *file = m->private;

        if (!file)
                return -EINVAL;

        rcu_read_lock();
        pid = rcu_dereference(file->pid);
        task = pid_task(pid, PIDTYPE_TGID);

        seq_printf(m, "pid: %d\n", task ? task->pid : 0);
        seq_printf(m, "comm: %s\n", task ? task->comm : "Unset");
        rcu_read_unlock();
        return 0;
}

static int drm_debufs_proc_info_open(struct inode *inode, struct file *file)
{
        return single_open(file, drm_debugfs_proc_info_show, inode->i_private);
}

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

/**
 * drm_debugfs_clients_add - Add a per client debugfs directory
 * @file: drm_file for a client
 *
 * Create the debugfs directory for each client. This will be used to populate
 * driver specific data for each client.
 *
 * Also add the process information debugfs file for each client to tag
 * which client belongs to which process.
 */
void drm_debugfs_clients_add(struct drm_file *file)
{
        char *client;

        client = kasprintf(GFP_KERNEL, "client-%llu", file->client_id);
        if (!client)
                return;

        /* Create a debugfs directory for the client in root on drm debugfs */
        file->debugfs_client = debugfs_create_dir(client, drm_debugfs_root);
        kfree(client);

        debugfs_create_file("proc_info", 0444, file->debugfs_client, file,
                            &drm_debugfs_proc_info_fops);

        client = kasprintf(GFP_KERNEL, "../%s", file->minor->dev->unique);
        if (!client)
                return;

        /* Create a link from client_id to the drm device this client id belongs to */
        debugfs_create_symlink("device", file->debugfs_client, client);
        kfree(client);
}

/**
 * drm_debugfs_clients_remove - removes all debugfs directories and files
 * @file: drm_file for a client
 *
 * Removes the debugfs directories recursively from the client directory.
 *
 * There is also a possibility that debugfs files are open while the drm_file
 * is released.
 */
void drm_debugfs_clients_remove(struct drm_file *file)
{
        debugfs_remove_recursive(file->debugfs_client);
        file->debugfs_client = NULL;
}

/**
 * drm_debugfs_dev_init - create debugfs directory for the device
 * @dev: the device which we want to create the directory for
 *
 * Creates the debugfs directory for the device under the given root directory.
 */
void drm_debugfs_dev_init(struct drm_device *dev)
{
        if (drm_core_check_feature(dev, DRIVER_COMPUTE_ACCEL))
                dev->debugfs_root = debugfs_create_dir(dev->unique, accel_debugfs_root);
        else
                dev->debugfs_root = debugfs_create_dir(dev->unique, drm_debugfs_root);
}

/**
 * drm_debugfs_dev_fini - cleanup debugfs directory
 * @dev: the device to cleanup the debugfs stuff
 *
 * Remove the debugfs directory, might be called multiple times.
 */
void drm_debugfs_dev_fini(struct drm_device *dev)
{
        debugfs_remove_recursive(dev->debugfs_root);
        dev->debugfs_root = NULL;
}

void drm_debugfs_dev_register(struct drm_device *dev)
{
        drm_debugfs_add_files(dev, drm_debugfs_list, DRM_DEBUGFS_ENTRIES);

        if (drm_core_check_feature(dev, DRIVER_MODESET)) {
                drm_framebuffer_debugfs_init(dev);
                drm_client_debugfs_init(dev);
        }
        if (drm_drv_uses_atomic_modeset(dev))
                drm_atomic_debugfs_init(dev);
}

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

        sprintf(name, "%d", minor_id);
        minor->debugfs_symlink = debugfs_create_symlink(name, drm_debugfs_root,
                                                        dev->unique);

        /* TODO: Only for compatibility with drivers */
        minor->debugfs_root = dev->debugfs_root;

        if (dev->driver->debugfs_init && dev->render != minor)
                dev->driver->debugfs_init(minor);

        return 0;
}

void drm_debugfs_unregister(struct drm_minor *minor)
{
        debugfs_remove(minor->debugfs_symlink);
        minor->debugfs_symlink = NULL;
}

/**
 * drm_debugfs_add_file - Add a given file to the DRM device debugfs file list
 * @dev: drm device for the ioctl
 * @name: debugfs file name
 * @show: show callback
 * @data: driver-private data, should not be device-specific
 *
 * Add a given file entry to the DRM device debugfs file list to be created on
 * drm_debugfs_init.
 */
void drm_debugfs_add_file(struct drm_device *dev, const char *name,
                          int (*show)(struct seq_file*, void*), void *data)
{
        struct drm_debugfs_entry *entry = drmm_kzalloc(dev, sizeof(*entry), GFP_KERNEL);

        if (!entry)
                return;

        entry->file.name = name;
        entry->file.show = show;
        entry->file.data = data;
        entry->dev = dev;

        debugfs_create_file(name, 0444, dev->debugfs_root, entry,
                            &drm_debugfs_entry_fops);
}
EXPORT_SYMBOL(drm_debugfs_add_file);

/**
 * drm_debugfs_add_files - Add an array of files to the DRM device debugfs file list
 * @dev: drm device for the ioctl
 * @files: The array of files to create
 * @count: The number of files given
 *
 * Add a given set of debugfs files represented by an array of
 * &struct drm_debugfs_info in the DRM device debugfs file list.
 */
void drm_debugfs_add_files(struct drm_device *dev, const struct drm_debugfs_info *files, int count)
{
        int i;

        for (i = 0; i < count; i++)
                drm_debugfs_add_file(dev, files[i].name, files[i].show, files[i].data);
}
EXPORT_SYMBOL(drm_debugfs_add_files);

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

        return len;
}

static int edid_show(struct seq_file *m, void *data)
{
        return drm_edid_override_show(m->private, m);
}

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;
        int ret;

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

        if (len == 5 && !strncmp(buf, "reset", 5))
                ret = drm_edid_override_reset(connector);
        else
                ret = drm_edid_override_set(connector, buf, len);

        kfree(buf);

        return ret ? ret : len;
}

/*
 * Returns the min and max vrr vfreq through the connector's debugfs file.
 * Example usage: cat /sys/kernel/debug/dri/0/DP-1/vrr_range
 */
static int vrr_range_show(struct seq_file *m, void *data)
{
        struct drm_connector *connector = m->private;

        if (connector->status != connector_status_connected)
                return -ENODEV;

        seq_printf(m, "Min: %u\n", connector->display_info.monitor_range.min_vfreq);
        seq_printf(m, "Max: %u\n", connector->display_info.monitor_range.max_vfreq);

        return 0;
}
DEFINE_SHOW_ATTRIBUTE(vrr_range);

/*
 * Returns Connector's max supported bpc through debugfs file.
 * Example usage: cat /sys/kernel/debug/dri/0/DP-1/output_bpc
 */
static int output_bpc_show(struct seq_file *m, void *data)
{
        struct drm_connector *connector = m->private;

        if (connector->status != connector_status_connected)
                return -ENODEV;

        seq_printf(m, "Maximum: %u\n", connector->display_info.bpc);

        return 0;
}
DEFINE_SHOW_ATTRIBUTE(output_bpc);

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
};

static ssize_t
audio_infoframe_read(struct file *filp, char __user *ubuf, size_t count, loff_t *ppos)
{
        struct drm_connector_hdmi_infoframe *infoframe;
        struct drm_connector *connector;
        union hdmi_infoframe *frame;
        u8 buf[HDMI_INFOFRAME_SIZE(AUDIO)];
        ssize_t len = 0;

        connector = filp->private_data;
        mutex_lock(&connector->hdmi.infoframes.lock);

        infoframe = &connector->hdmi.infoframes.audio;
        if (!infoframe->set)
                goto out;

        frame = &infoframe->data;
        len = hdmi_infoframe_pack(frame, buf, sizeof(buf));
        if (len < 0)
                goto out;

        len = simple_read_from_buffer(ubuf, count, ppos, buf, len);

out:
        mutex_unlock(&connector->hdmi.infoframes.lock);
        return len;
}

static const struct file_operations audio_infoframe_fops = {
        .owner   = THIS_MODULE,
        .open    = simple_open,
        .read    = audio_infoframe_read,
};

static int create_hdmi_audio_infoframe_file(struct drm_connector *connector,
                                            struct dentry *parent)
{
        struct dentry *file;

        if (!connector->hdmi.funcs ||
            !connector->hdmi.funcs->audio.write_infoframe)
                return 0;

        file = debugfs_create_file("audio", 0400, parent, connector, &audio_infoframe_fops);
        if (IS_ERR(file))
                return PTR_ERR(file);

        return 0;
}

#define DEFINE_INFOFRAME_FILE(_f) \
static ssize_t _f##_read_infoframe(struct file *filp, \
                                   char __user *ubuf, \
                                   size_t count,      \
                                   loff_t *ppos)      \
{ \
        struct drm_connector_hdmi_infoframe *infoframe; \
        struct drm_connector_state *conn_state; \
        struct drm_connector *connector; \
        union hdmi_infoframe *frame; \
        struct drm_device *dev; \
        u8 buf[HDMI_INFOFRAME_SIZE(MAX)]; \
        ssize_t len = 0; \
        \
        connector = filp->private_data; \
        dev = connector->dev; \
        \
        drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); \
        \
        conn_state = connector->state; \
        infoframe = &conn_state->hdmi.infoframes._f; \
        if (!infoframe->set) \
                goto out; \
        \
        frame = &infoframe->data; \
        len = hdmi_infoframe_pack(frame, buf, sizeof(buf)); \
        if (len < 0) \
                goto out; \
        \
        len = simple_read_from_buffer(ubuf, count, ppos, buf, len); \
        \
out: \
        drm_modeset_unlock(&dev->mode_config.connection_mutex); \
        return len; \
} \
\
static const struct file_operations _f##_infoframe_fops = { \
        .owner = THIS_MODULE, \
        .open = simple_open, \
        .read = _f##_read_infoframe, \
}; \
\
static int create_hdmi_## _f ## _infoframe_file(struct drm_connector *connector, \
                                                struct dentry *parent) \
{ \
        struct dentry *file; \
        \
        if (!connector->hdmi.funcs || \
            !connector->hdmi.funcs->_f.write_infoframe) \
                return 0; \
        file = debugfs_create_file(#_f, 0400, parent, connector, &_f ## _infoframe_fops); \
        if (IS_ERR(file)) \
                return PTR_ERR(file); \
        \
        return 0; \
}

DEFINE_INFOFRAME_FILE(avi);
DEFINE_INFOFRAME_FILE(hdmi);
DEFINE_INFOFRAME_FILE(hdr_drm);
DEFINE_INFOFRAME_FILE(spd);

static int create_hdmi_infoframe_files(struct drm_connector *connector,
                                       struct dentry *parent)
{
        int ret;

        ret = create_hdmi_audio_infoframe_file(connector, parent);
        if (ret)
                return ret;

        ret = create_hdmi_avi_infoframe_file(connector, parent);
        if (ret)
                return ret;

        ret = create_hdmi_hdmi_infoframe_file(connector, parent);
        if (ret)
                return ret;

        ret = create_hdmi_hdr_drm_infoframe_file(connector, parent);
        if (ret)
                return ret;

        ret = create_hdmi_spd_infoframe_file(connector, parent);
        if (ret)
                return ret;

        return 0;
}

static void hdmi_debugfs_add(struct drm_connector *connector)
{
        struct dentry *dir;

        if (!(connector->connector_type == DRM_MODE_CONNECTOR_HDMIA ||
              connector->connector_type == DRM_MODE_CONNECTOR_HDMIB))
                return;

        dir = debugfs_create_dir("infoframes", connector->debugfs_entry);
        if (IS_ERR(dir))
                return;

        create_hdmi_infoframe_files(connector, dir);
}

void drm_debugfs_connector_add(struct drm_connector *connector)
{
        struct drm_device *dev = connector->dev;
        struct dentry *root;

        if (!dev->debugfs_root)
                return;

        root = debugfs_create_dir(connector->name, dev->debugfs_root);
        connector->debugfs_entry = root;

        /* force */
        debugfs_create_file("force", 0644, root, connector,
                            &drm_connector_fops);

        /* edid */
        debugfs_create_file("edid_override", 0644, root, connector,
                            &drm_edid_fops);

        /* vrr range */
        debugfs_create_file("vrr_range", 0444, root, connector,
                            &vrr_range_fops);

        /* max bpc */
        debugfs_create_file("output_bpc", 0444, root, connector,
                            &output_bpc_fops);

        hdmi_debugfs_add(connector);

        if (connector->funcs->debugfs_init)
                connector->funcs->debugfs_init(connector, root);
}

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

        debugfs_remove_recursive(connector->debugfs_entry);

        connector->debugfs_entry = NULL;
}

void drm_debugfs_crtc_add(struct drm_crtc *crtc)
{
        struct drm_device *dev = crtc->dev;
        struct dentry *root;
        char *name;

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

        root = debugfs_create_dir(name, dev->debugfs_root);
        kfree(name);

        crtc->debugfs_entry = root;

        drm_debugfs_crtc_crc_add(crtc);
}

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

void drm_debugfs_encoder_add(struct drm_encoder *encoder)
{
        struct drm_minor *minor = encoder->dev->primary;
        struct dentry *root;
        char *name;

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

        root = debugfs_create_dir(name, minor->debugfs_root);
        kfree(name);

        encoder->debugfs_entry = root;

        drm_bridge_debugfs_encoder_params(root, encoder);

        if (encoder->funcs && encoder->funcs->debugfs_init)
                encoder->funcs->debugfs_init(encoder, root);
}

void drm_debugfs_encoder_remove(struct drm_encoder *encoder)
{
        debugfs_remove_recursive(encoder->debugfs_entry);
        encoder->debugfs_entry = NULL;
}