1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright © 2014 Broadcom 4 */ 5 6 #include <linux/seq_file.h> 7 #include <linux/circ_buf.h> 8 #include <linux/ctype.h> 9 #include <linux/debugfs.h> 10 #include <drm/drmP.h> 11 12 #include "vc4_drv.h" 13 #include "vc4_regs.h" 14 15 struct vc4_debugfs_info_entry { 16 struct list_head link; 17 struct drm_info_list info; 18 }; 19 20 /** 21 * Called at drm_dev_register() time on each of the minors registered 22 * by the DRM device, to attach the debugfs files. 23 */ 24 int 25 vc4_debugfs_init(struct drm_minor *minor) 26 { 27 struct vc4_dev *vc4 = to_vc4_dev(minor->dev); 28 struct vc4_debugfs_info_entry *entry; 29 struct dentry *dentry; 30 31 dentry = debugfs_create_bool("hvs_load_tracker", S_IRUGO | S_IWUSR, 32 minor->debugfs_root, 33 &vc4->load_tracker_enabled); 34 if (!dentry) 35 return -ENOMEM; 36 37 list_for_each_entry(entry, &vc4->debugfs_list, link) { 38 int ret = drm_debugfs_create_files(&entry->info, 1, 39 minor->debugfs_root, minor); 40 41 if (ret) 42 return ret; 43 } 44 45 return 0; 46 } 47 48 static int vc4_debugfs_regset32(struct seq_file *m, void *unused) 49 { 50 struct drm_info_node *node = (struct drm_info_node *)m->private; 51 struct debugfs_regset32 *regset = node->info_ent->data; 52 struct drm_printer p = drm_seq_file_printer(m); 53 54 drm_print_regset32(&p, regset); 55 56 return 0; 57 } 58 59 /** 60 * Registers a debugfs file with a callback function for a vc4 component. 61 * 62 * This is like drm_debugfs_create_files(), but that can only be 63 * called a given DRM minor, while the various VC4 components want to 64 * register their debugfs files during the component bind process. We 65 * track the request and delay it to be called on each minor during 66 * vc4_debugfs_init(). 67 */ 68 void vc4_debugfs_add_file(struct drm_device *dev, 69 const char *name, 70 int (*show)(struct seq_file*, void*), 71 void *data) 72 { 73 struct vc4_dev *vc4 = to_vc4_dev(dev); 74 75 struct vc4_debugfs_info_entry *entry = 76 devm_kzalloc(dev->dev, sizeof(*entry), GFP_KERNEL); 77 78 if (!entry) 79 return; 80 81 entry->info.name = name; 82 entry->info.show = show; 83 entry->info.data = data; 84 85 list_add(&entry->link, &vc4->debugfs_list); 86 } 87 88 void vc4_debugfs_add_regset32(struct drm_device *drm, 89 const char *name, 90 struct debugfs_regset32 *regset) 91 { 92 vc4_debugfs_add_file(drm, name, vc4_debugfs_regset32, regset); 93 } 94