/* * 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" /*************************************************** * 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\n", "command", "tgid", "dev", "uid", "magic", DRM_CLIENT_NAME_MAX_LEN, "name"); /* 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\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>"); 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); /** * drm_debugfs_dev_init - create debugfs directory for the device * @dev: the device which we want to create the directory for * @root: the parent directory depending on the device type * * Creates the debugfs directory for the device under the given root directory. */void drm_debugfs_dev_init(struct drm_device *dev, struct dentry *root){ dev->debugfs_root = debugfs_create_dir(dev->unique, 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 dentry *root){ struct drm_device *dev = minor->dev; char name[64]; sprintf(name, "%d", minor_id); minor->debugfs_symlink = debugfs_create_symlink(name, 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)Lines 1–500 of 804. 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/* * 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" /*************************************************** * 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\n", "command", "tgid", "dev", "uid", "magic", DRM_CLIENT_NAME_MAX_LEN, "name"); /* 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\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>"); 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); /** * drm_debugfs_dev_init - create debugfs directory for the device * @dev: the device which we want to create the directory for * @root: the parent directory depending on the device type * * Creates the debugfs directory for the device under the given root directory. */ void drm_debugfs_dev_init(struct drm_device *dev, struct dentry *root) { dev->debugfs_root = debugfs_create_dir(dev->unique, 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 dentry *root) { struct drm_device *dev = minor->dev; char name[64]; sprintf(name, "%d", minor_id); minor->debugfs_symlink = debugfs_create_symlink(name, 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)