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