summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/armada/armada_debugfs.c
blob: 90222e60d2d60e818227f4017a86495f5b983d90 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
/*
 * Copyright (C) 2012 Russell King
 *  Rewritten from the dovefb driver, and Armada510 manuals.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 as
 * published by the Free Software Foundation.
 */
#include <linux/ctype.h>
#include <linux/debugfs.h>
#include <linux/module.h>
#include <linux/seq_file.h>
#include <drm/drmP.h>
#include "armada_crtc.h"
#include "armada_drm.h"

static int armada_debugfs_gem_linear_show(struct seq_file *m, void *data)
{
	struct drm_info_node *node = m->private;
	struct drm_device *dev = node->minor->dev;
	struct armada_private *priv = dev->dev_private;
	int ret;

	mutex_lock(&priv->linear_lock);
	ret = drm_mm_dump_table(m, &priv->linear);
	mutex_unlock(&priv->linear_lock);

	return ret;
}

static int armada_debugfs_reg_show(struct seq_file *m, void *data)
{
	struct drm_device *dev = m->private;
	struct armada_private *priv = dev->dev_private;
	int n, i;

	if (priv) {
		for (n = 0; n < ARRAY_SIZE(priv->dcrtc); n++) {
			struct armada_crtc *dcrtc = priv->dcrtc[n];
			if (!dcrtc)
				continue;

			for (i = 0x84; i <= 0x1c4; i += 4) {
				uint32_t v = readl_relaxed(dcrtc->base + i);
				seq_printf(m, "%u: 0x%04x: 0x%08x\n", n, i, v);
			}
		}
	}

	return 0;
}

static int armada_debugfs_reg_r_open(struct inode *inode, struct file *file)
{
	return single_open(file, armada_debugfs_reg_show, inode->i_private);
}

static const struct file_operations fops_reg_r = {
	.owner = THIS_MODULE,
	.open = armada_debugfs_reg_r_open,
	.read = seq_read,
	.llseek = seq_lseek,
	.release = single_release,
};

static int armada_debugfs_write(struct file *file, const char __user *ptr,
	size_t len, loff_t *off)
{
	struct drm_device *dev = file->private_data;
	struct armada_private *priv = dev->dev_private;
	struct armada_crtc *dcrtc = priv->dcrtc[0];
	char buf[32], *p;
	uint32_t reg, val;
	int ret;

	if (*off != 0)
		return 0;

	if (len > sizeof(buf) - 1)
		len = sizeof(buf) - 1;

	ret = strncpy_from_user(buf, ptr, len);
	if (ret < 0)
		return ret;
	buf[len] = '\0';

	reg = simple_strtoul(buf, &p, 16);
	if (!isspace(*p))
		return -EINVAL;
	val = simple_strtoul(p + 1, NULL, 16);

	if (reg >= 0x84 && reg <= 0x1c4)
		writel(val, dcrtc->base + reg);

	return len;
}

static const struct file_operations fops_reg_w = {
	.owner = THIS_MODULE,
	.open = simple_open,
	.write = armada_debugfs_write,
	.llseek = noop_llseek,
};

static struct drm_info_list armada_debugfs_list[] = {
	{ "gem_linear", armada_debugfs_gem_linear_show, 0 },
};
#define ARMADA_DEBUGFS_ENTRIES ARRAY_SIZE(armada_debugfs_list)

static int drm_add_fake_info_node(struct drm_minor *minor, struct dentry *ent,
	const void *key)
{
	struct drm_info_node *node;

	node = kmalloc(sizeof(struct drm_info_node), GFP_KERNEL);
	if (!node) {
		debugfs_remove(ent);
		return -ENOMEM;
	}

	node->minor = minor;
	node->dent = ent;
	node->info_ent = (void *) key;

	mutex_lock(&minor->debugfs_lock);
	list_add(&node->list, &minor->debugfs_list);
	mutex_unlock(&minor->debugfs_lock);

	return 0;
}

static int armada_debugfs_create(struct dentry *root, struct drm_minor *minor,
	const char *name, umode_t mode, const struct file_operations *fops)
{
	struct dentry *de;

	de = debugfs_create_file(name, mode, root, minor->dev, fops);

	return drm_add_fake_info_node(minor, de, fops);
}

int armada_drm_debugfs_init(struct drm_minor *minor)
{
	int ret;

	ret = drm_debugfs_create_files(armada_debugfs_list,
				       ARMADA_DEBUGFS_ENTRIES,
				       minor->debugfs_root, minor);
	if (ret)
		return ret;

	ret = armada_debugfs_create(minor->debugfs_root, minor,
				   "reg", S_IFREG | S_IRUSR, &fops_reg_r);
	if (ret)
		goto err_1;

	ret = armada_debugfs_create(minor->debugfs_root, minor,
				"reg_wr", S_IFREG | S_IWUSR, &fops_reg_w);
	if (ret)
		goto err_2;
	return ret;

 err_2:
	drm_debugfs_remove_files((struct drm_info_list *)&fops_reg_r, 1, minor);
 err_1:
	drm_debugfs_remove_files(armada_debugfs_list, ARMADA_DEBUGFS_ENTRIES,
				 minor);
	return ret;
}

void armada_drm_debugfs_cleanup(struct drm_minor *minor)
{
	drm_debugfs_remove_files((struct drm_info_list *)&fops_reg_w, 1, minor);
	drm_debugfs_remove_files((struct drm_info_list *)&fops_reg_r, 1, minor);
	drm_debugfs_remove_files(armada_debugfs_list, ARMADA_DEBUGFS_ENTRIES,
				 minor);
}