1 /* 2 * Copyright © 2014 Broadcom 3 * 4 * This program is free software; you can redistribute it and/or modify 5 * it under the terms of the GNU General Public License version 2 as 6 * published by the Free Software Foundation. 7 */ 8 9 #include <linux/seq_file.h> 10 #include <linux/circ_buf.h> 11 #include <linux/ctype.h> 12 #include <linux/debugfs.h> 13 #include <drm/drmP.h> 14 15 #include "vc4_drv.h" 16 #include "vc4_regs.h" 17 18 struct vc4_debugfs_info_entry { 19 struct list_head link; 20 struct drm_info_list info; 21 }; 22 23 /** 24 * Called at drm_dev_register() time on each of the minors registered 25 * by the DRM device, to attach the debugfs files. 26 */ 27 int 28 vc4_debugfs_init(struct drm_minor *minor) 29 { 30 struct vc4_dev *vc4 = to_vc4_dev(minor->dev); 31 struct vc4_debugfs_info_entry *entry; 32 struct dentry *dentry; 33 34 dentry = debugfs_create_bool("hvs_load_tracker", S_IRUGO | S_IWUSR, 35 minor->debugfs_root, 36 &vc4->load_tracker_enabled); 37 if (!dentry) 38 return -ENOMEM; 39 40 list_for_each_entry(entry, &vc4->debugfs_list, link) { 41 int ret = drm_debugfs_create_files(&entry->info, 1, 42 minor->debugfs_root, minor); 43 44 if (ret) 45 return ret; 46 } 47 48 return 0; 49 } 50 51 static int vc4_debugfs_regset32(struct seq_file *m, void *unused) 52 { 53 struct drm_info_node *node = (struct drm_info_node *)m->private; 54 struct debugfs_regset32 *regset = node->info_ent->data; 55 struct drm_printer p = drm_seq_file_printer(m); 56 57 drm_print_regset32(&p, regset); 58 59 return 0; 60 } 61 62 /** 63 * Registers a debugfs file with a callback function for a vc4 component. 64 * 65 * This is like drm_debugfs_create_files(), but that can only be 66 * called a given DRM minor, while the various VC4 components want to 67 * register their debugfs files during the component bind process. We 68 * track the request and delay it to be called on each minor during 69 * vc4_debugfs_init(). 70 */ 71 void vc4_debugfs_add_file(struct drm_device *dev, 72 const char *name, 73 int (*show)(struct seq_file*, void*), 74 void *data) 75 { 76 struct vc4_dev *vc4 = to_vc4_dev(dev); 77 78 struct vc4_debugfs_info_entry *entry = 79 devm_kzalloc(dev->dev, sizeof(*entry), GFP_KERNEL); 80 81 if (!entry) 82 return; 83 84 entry->info.name = name; 85 entry->info.show = show; 86 entry->info.data = data; 87 88 list_add(&entry->link, &vc4->debugfs_list); 89 } 90 91 void vc4_debugfs_add_regset32(struct drm_device *drm, 92 const char *name, 93 struct debugfs_regset32 *regset) 94 { 95 vc4_debugfs_add_file(drm, name, vc4_debugfs_regset32, regset); 96 } 97