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 <linux/platform_device.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 void 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 30 if (!of_device_is_compatible(vc4->hvs->pdev->dev.of_node, 31 "brcm,bcm2711-vc5")) 32 debugfs_create_bool("hvs_load_tracker", S_IRUGO | S_IWUSR, 33 minor->debugfs_root, &vc4->load_tracker_enabled); 34 35 list_for_each_entry(entry, &vc4->debugfs_list, link) { 36 drm_debugfs_create_files(&entry->info, 1, 37 minor->debugfs_root, minor); 38 } 39 } 40 41 static int vc4_debugfs_regset32(struct seq_file *m, void *unused) 42 { 43 struct drm_info_node *node = (struct drm_info_node *)m->private; 44 struct debugfs_regset32 *regset = node->info_ent->data; 45 struct drm_printer p = drm_seq_file_printer(m); 46 47 drm_print_regset32(&p, regset); 48 49 return 0; 50 } 51 52 /* 53 * Registers a debugfs file with a callback function for a vc4 component. 54 * 55 * This is like drm_debugfs_create_files(), but that can only be 56 * called a given DRM minor, while the various VC4 components want to 57 * register their debugfs files during the component bind process. We 58 * track the request and delay it to be called on each minor during 59 * vc4_debugfs_init(). 60 */ 61 void vc4_debugfs_add_file(struct drm_device *dev, 62 const char *name, 63 int (*show)(struct seq_file*, void*), 64 void *data) 65 { 66 struct vc4_dev *vc4 = to_vc4_dev(dev); 67 68 struct vc4_debugfs_info_entry *entry = 69 devm_kzalloc(dev->dev, sizeof(*entry), GFP_KERNEL); 70 71 if (!entry) 72 return; 73 74 entry->info.name = name; 75 entry->info.show = show; 76 entry->info.data = data; 77 78 list_add(&entry->link, &vc4->debugfs_list); 79 } 80 81 void vc4_debugfs_add_regset32(struct drm_device *drm, 82 const char *name, 83 struct debugfs_regset32 *regset) 84 { 85 vc4_debugfs_add_file(drm, name, vc4_debugfs_regset32, regset); 86 } 87