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
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 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
vc4_debugfs_regset32(struct seq_file * m,void * unused)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 */
vc4_debugfs_add_file(struct drm_device * dev,const char * name,int (* show)(struct seq_file *,void *),void * data)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
vc4_debugfs_add_regset32(struct drm_device * drm,const char * name,struct debugfs_regset32 * regset)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
