1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Copyright (C) 2012 Russell King
4 * Rewritten from the dovefb driver, and Armada510 manuals.
5 */
6
7#include <linux/ctype.h>
8#include <linux/module.h>
9#include <linux/seq_file.h>
10#include <linux/uaccess.h>
11
12#include <drm/drm_debugfs.h>
13#include <drm/drm_file.h>
14
15#include "armada_crtc.h"
16#include "armada_drm.h"
17
18static int armada_debugfs_gem_linear_show(struct seq_file *m, void *data)
19{
20 struct drm_info_node *node = m->private;
21 struct drm_device *dev = node->minor->dev;
22 struct armada_private *priv = drm_to_armada_dev(dev);
23 struct drm_printer p = drm_seq_file_printer(f: m);
24
25 mutex_lock(&priv->linear_lock);
26 drm_mm_print(mm: &priv->linear, p: &p);
27 mutex_unlock(lock: &priv->linear_lock);
28
29 return 0;
30}
31
32static int armada_debugfs_crtc_reg_show(struct seq_file *m, void *data)
33{
34 struct armada_crtc *dcrtc = m->private;
35 int i;
36
37 for (i = 0x84; i <= 0x1c4; i += 4) {
38 u32 v = readl_relaxed(dcrtc->base + i);
39 seq_printf(m, fmt: "0x%04x: 0x%08x\n", i, v);
40 }
41
42 return 0;
43}
44
45static int armada_debugfs_crtc_reg_open(struct inode *inode, struct file *file)
46{
47 return single_open(file, armada_debugfs_crtc_reg_show,
48 inode->i_private);
49}
50
51static int armada_debugfs_crtc_reg_write(struct file *file,
52 const char __user *ptr, size_t len, loff_t *off)
53{
54 struct armada_crtc *dcrtc;
55 unsigned long reg, mask, val;
56 char buf[32];
57 int ret;
58 u32 v;
59
60 if (*off != 0)
61 return 0;
62
63 if (len > sizeof(buf) - 1)
64 len = sizeof(buf) - 1;
65
66 ret = strncpy_from_user(dst: buf, src: ptr, count: len);
67 if (ret < 0)
68 return ret;
69 buf[len] = '\0';
70
71 if (sscanf(buf, "%lx %lx %lx", &reg, &mask, &val) != 3)
72 return -EINVAL;
73 if (reg < 0x84 || reg > 0x1c4 || reg & 3)
74 return -ERANGE;
75
76 dcrtc = ((struct seq_file *)file->private_data)->private;
77 v = readl(addr: dcrtc->base + reg);
78 v &= ~mask;
79 v |= val & mask;
80 writel(val: v, addr: dcrtc->base + reg);
81
82 return len;
83}
84
85static const struct file_operations armada_debugfs_crtc_reg_fops = {
86 .owner = THIS_MODULE,
87 .open = armada_debugfs_crtc_reg_open,
88 .read = seq_read,
89 .write = armada_debugfs_crtc_reg_write,
90 .llseek = seq_lseek,
91 .release = single_release,
92};
93
94void armada_drm_crtc_debugfs_init(struct armada_crtc *dcrtc)
95{
96 debugfs_create_file(name: "armada-regs", mode: 0600, parent: dcrtc->crtc.debugfs_entry,
97 data: dcrtc, fops: &armada_debugfs_crtc_reg_fops);
98}
99
100static struct drm_info_list armada_debugfs_list[] = {
101 { "gem_linear", armada_debugfs_gem_linear_show, 0 },
102};
103#define ARMADA_DEBUGFS_ENTRIES ARRAY_SIZE(armada_debugfs_list)
104
105int armada_drm_debugfs_init(struct drm_minor *minor)
106{
107 drm_debugfs_create_files(files: armada_debugfs_list, ARMADA_DEBUGFS_ENTRIES,
108 root: minor->debugfs_root, minor);
109
110 return 0;
111}
112

source code of linux/drivers/gpu/drm/armada/armada_debugfs.c