1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (C) 2012 Russell King
4 * Rewritten from the dovefb driver, and Armada510 manuals.
6 #include <linux/ctype.h>
7 #include <linux/debugfs.h>
8 #include <linux/module.h>
9 #include <linux/seq_file.h>
11 #include "armada_crtc.h"
12 #include "armada_drm.h"
14 static int armada_debugfs_gem_linear_show(struct seq_file *m, void *data)
16 struct drm_info_node *node = m->private;
17 struct drm_device *dev = node->minor->dev;
18 struct armada_private *priv = dev->dev_private;
19 struct drm_printer p = drm_seq_file_printer(m);
21 mutex_lock(&priv->linear_lock);
22 drm_mm_print(&priv->linear, &p);
23 mutex_unlock(&priv->linear_lock);
28 static int armada_debugfs_crtc_reg_show(struct seq_file *m, void *data)
30 struct armada_crtc *dcrtc = m->private;
33 for (i = 0x84; i <= 0x1c4; i += 4) {
34 u32 v = readl_relaxed(dcrtc->base + i);
35 seq_printf(m, "0x%04x: 0x%08x\n", i, v);
41 static int armada_debugfs_crtc_reg_open(struct inode *inode, struct file *file)
43 return single_open(file, armada_debugfs_crtc_reg_show,
47 static int armada_debugfs_crtc_reg_write(struct file *file,
48 const char __user *ptr, size_t len, loff_t *off)
50 struct armada_crtc *dcrtc;
51 unsigned long reg, mask, val;
59 if (len > sizeof(buf) - 1)
60 len = sizeof(buf) - 1;
62 ret = strncpy_from_user(buf, ptr, len);
67 if (sscanf(buf, "%lx %lx %lx", ®, &mask, &val) != 3)
69 if (reg < 0x84 || reg > 0x1c4 || reg & 3)
72 dcrtc = ((struct seq_file *)file->private_data)->private;
73 v = readl(dcrtc->base + reg);
76 writel(v, dcrtc->base + reg);
81 static const struct file_operations armada_debugfs_crtc_reg_fops = {
83 .open = armada_debugfs_crtc_reg_open,
85 .write = armada_debugfs_crtc_reg_write,
87 .release = single_release,
90 void armada_drm_crtc_debugfs_init(struct armada_crtc *dcrtc)
92 debugfs_create_file("armada-regs", 0600, dcrtc->crtc.debugfs_entry,
93 dcrtc, &armada_debugfs_crtc_reg_fops);
96 static struct drm_info_list armada_debugfs_list[] = {
97 { "gem_linear", armada_debugfs_gem_linear_show, 0 },
99 #define ARMADA_DEBUGFS_ENTRIES ARRAY_SIZE(armada_debugfs_list)
101 int armada_drm_debugfs_init(struct drm_minor *minor)
103 drm_debugfs_create_files(armada_debugfs_list, ARMADA_DEBUGFS_ENTRIES,
104 minor->debugfs_root, minor);