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