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
14struct 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 */
23void
24vc4_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
38static 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 */
58void 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
78void 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}