Orange Pi5 kernel

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Copyright (C) 2012 Russell King
 *  Rewritten from the dovefb driver, and Armada510 manuals.
 */
 
#include <linux/ctype.h>
#include <linux/module.h>
#include <linux/seq_file.h>
#include <linux/uaccess.h>
 
#include <drm/drm_debugfs.h>
#include <drm/drm_file.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 = drm_to_armada_dev(dev);
<------>struct drm_printer p = drm_seq_file_printer(m);
 
<------>mutex_lock(&priv->linear_lock);
<------>drm_mm_print(&priv->linear, &p);
<------>mutex_unlock(&priv->linear_lock);
 
<------>return 0;
}
 
static int armada_debugfs_crtc_reg_show(struct seq_file *m, void *data)
{
<------>struct armada_crtc *dcrtc = m->private;
<------>int i;
 
<------>for (i = 0x84; i <= 0x1c4; i += 4) {
<------><------>u32 v = readl_relaxed(dcrtc->base + i);
<------><------>seq_printf(m, "0x%04x: 0x%08x\n", i, v);
<------>}
 
<------>return 0;
}
 
static int armada_debugfs_crtc_reg_open(struct inode *inode, struct file *file)
{
<------>return single_open(file, armada_debugfs_crtc_reg_show,
<------><------><------>   inode->i_private);
}
 
static int armada_debugfs_crtc_reg_write(struct file *file,
<------>const char __user *ptr, size_t len, loff_t *off)
{
<------>struct armada_crtc *dcrtc;
<------>unsigned long reg, mask, val;
<------>char buf[32];
<------>int ret;
<------>u32 v;
 
<------>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';
 
<------>if (sscanf(buf, "%lx %lx %lx", &reg, &mask, &val) != 3)
<------><------>return -EINVAL;
<------>if (reg < 0x84 || reg > 0x1c4 || reg & 3)
<------><------>return -ERANGE;
 
<------>dcrtc = ((struct seq_file *)file->private_data)->private;
<------>v = readl(dcrtc->base + reg);
<------>v &= ~mask;
<------>v |= val & mask;
<------>writel(v, dcrtc->base + reg);
 
<------>return len;
}
 
static const struct file_operations armada_debugfs_crtc_reg_fops = {
<------>.owner = THIS_MODULE,
<------>.open = armada_debugfs_crtc_reg_open,
<------>.read = seq_read,
<------>.write = armada_debugfs_crtc_reg_write,
<------>.llseek = seq_lseek,
<------>.release = single_release,
};
 
void armada_drm_crtc_debugfs_init(struct armada_crtc *dcrtc)
{
<------>debugfs_create_file("armada-regs", 0600, dcrtc->crtc.debugfs_entry,
<------><------><------>    dcrtc, &armada_debugfs_crtc_reg_fops);
}
 
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)
 
int armada_drm_debugfs_init(struct drm_minor *minor)
{
<------>drm_debugfs_create_files(armada_debugfs_list, ARMADA_DEBUGFS_ENTRIES,
<------><------><------><------> minor->debugfs_root, minor);
 
<------>return 0;
}