]> Git Repo - linux.git/blob - drivers/gpu/drm/vc4/vc4_debugfs.c
Merge tag 'for-5.7-rc3-tag' of git://git.kernel.org/pub/scm/linux/kernel/git/kdave...
[linux.git] / drivers / gpu / drm / vc4 / vc4_debugfs.c
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 }
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