diff options
Diffstat (limited to 'drivers/gpu/drm/armada/armada_debugfs.c')
| -rw-r--r-- | drivers/gpu/drm/armada/armada_debugfs.c | 177 |
1 files changed, 177 insertions, 0 deletions
diff --git a/drivers/gpu/drm/armada/armada_debugfs.c b/drivers/gpu/drm/armada/armada_debugfs.c new file mode 100644 index 00000000000..471e45627f1 --- /dev/null +++ b/drivers/gpu/drm/armada/armada_debugfs.c @@ -0,0 +1,177 @@ +/* + * 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(&dev->struct_mutex); + ret = drm_mm_dump_table(m, &priv->linear); + mutex_unlock(&dev->struct_mutex); + + 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 == NULL) { + 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); +} |