112 lines
2.6 KiB
C
112 lines
2.6 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2012 Russell King
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* Rewritten from the dovefb driver, and Armada510 manuals.
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*/
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#include <linux/ctype.h>
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#include <linux/module.h>
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#include <linux/seq_file.h>
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#include <linux/uaccess.h>
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#include <drm/drm_debugfs.h>
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#include <drm/drm_file.h>
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#include "armada_crtc.h"
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#include "armada_drm.h"
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static int armada_debugfs_gem_linear_show(struct seq_file *m, void *data)
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{
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struct drm_info_node *node = m->private;
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struct drm_device *dev = node->minor->dev;
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struct armada_private *priv = drm_to_armada_dev(dev);
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struct drm_printer p = drm_seq_file_printer(m);
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mutex_lock(&priv->linear_lock);
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drm_mm_print(&priv->linear, &p);
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mutex_unlock(&priv->linear_lock);
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return 0;
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}
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static int armada_debugfs_crtc_reg_show(struct seq_file *m, void *data)
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{
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struct armada_crtc *dcrtc = m->private;
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int i;
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for (i = 0x84; i <= 0x1c4; i += 4) {
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u32 v = readl_relaxed(dcrtc->base + i);
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seq_printf(m, "0x%04x: 0x%08x\n", i, v);
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}
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return 0;
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}
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static int armada_debugfs_crtc_reg_open(struct inode *inode, struct file *file)
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{
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return single_open(file, armada_debugfs_crtc_reg_show,
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inode->i_private);
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}
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static int armada_debugfs_crtc_reg_write(struct file *file,
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const char __user *ptr, size_t len, loff_t *off)
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{
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struct armada_crtc *dcrtc;
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unsigned long reg, mask, val;
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char buf[32];
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int ret;
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u32 v;
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if (*off != 0)
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return 0;
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if (len > sizeof(buf) - 1)
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len = sizeof(buf) - 1;
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ret = strncpy_from_user(buf, ptr, len);
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if (ret < 0)
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return ret;
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buf[len] = '\0';
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if (sscanf(buf, "%lx %lx %lx", ®, &mask, &val) != 3)
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return -EINVAL;
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if (reg < 0x84 || reg > 0x1c4 || reg & 3)
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return -ERANGE;
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dcrtc = ((struct seq_file *)file->private_data)->private;
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v = readl(dcrtc->base + reg);
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v &= ~mask;
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v |= val & mask;
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writel(v, dcrtc->base + reg);
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return len;
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}
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static const struct file_operations armada_debugfs_crtc_reg_fops = {
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.owner = THIS_MODULE,
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.open = armada_debugfs_crtc_reg_open,
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.read = seq_read,
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.write = armada_debugfs_crtc_reg_write,
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.llseek = seq_lseek,
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.release = single_release,
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};
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void armada_drm_crtc_debugfs_init(struct armada_crtc *dcrtc)
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{
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debugfs_create_file("armada-regs", 0600, dcrtc->crtc.debugfs_entry,
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dcrtc, &armada_debugfs_crtc_reg_fops);
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}
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static struct drm_info_list armada_debugfs_list[] = {
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{ "gem_linear", armada_debugfs_gem_linear_show, 0 },
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};
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#define ARMADA_DEBUGFS_ENTRIES ARRAY_SIZE(armada_debugfs_list)
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int armada_drm_debugfs_init(struct drm_minor *minor)
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{
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drm_debugfs_create_files(armada_debugfs_list, ARMADA_DEBUGFS_ENTRIES,
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minor->debugfs_root, minor);
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return 0;
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}
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