LXR linux/drivers/gpu/drm/vc4/vc4

   1// SPDX-License-Identifier: GPL-2.0-only
   2/*
   3 *  Copyright © 2014 Broadcom
   4 */
   5
   6#include <linux/seq_file.h>
   7#include <linux/circ_buf.h>
   8#include <linux/ctype.h>
   9#include <linux/debugfs.h>
  10
  11#include "vc4_drv.h"
  12#include "vc4_regs.h"
  13
  14struct vc4_debugfs_info_entry {
  15        struct list_head link;
  16        struct drm_info_list info;
  17};
  18
  19/*
  20 * Called at drm_dev_register() time on each of the minors registered
  21 * by the DRM device, to attach the debugfs files.
  22 */
  23void
  24vc4_debugfs_init(struct drm_minor *minor)
  25{
  26        struct vc4_dev *vc4 = to_vc4_dev(minor->dev);
  27        struct vc4_debugfs_info_entry *entry;
  28
  29        debugfs_create_bool("hvs_load_tracker", S_IRUGO | S_IWUSR,
  30                            minor->debugfs_root, &vc4->load_tracker_enabled);
  31
  32        list_for_each_entry(entry, &vc4->debugfs_list, link) {
  33                drm_debugfs_create_files(&entry->info, 1,
  34                                         minor->debugfs_root, minor);
  35        }
  36}
  37
  38static int vc4_debugfs_regset32(struct seq_file *m, void *unused)
  39{
  40        struct drm_info_node *node = (struct drm_info_node *)m->private;
  41        struct debugfs_regset32 *regset = node->info_ent->data;
  42        struct drm_printer p = drm_seq_file_printer(m);
  43
  44        drm_print_regset32(&p, regset);
  45
  46        return 0;
  47}
  48
  49/*
  50 * Registers a debugfs file with a callback function for a vc4 component.
  51 *
  52 * This is like drm_debugfs_create_files(), but that can only be
  53 * called a given DRM minor, while the various VC4 components want to
  54 * register their debugfs files during the component bind process.  We
  55 * track the request and delay it to be called on each minor during
  56 * vc4_debugfs_init().
  57 */
  58void vc4_debugfs_add_file(struct drm_device *dev,
  59                          const char *name,
  60                          int (*show)(struct seq_file*, void*),
  61                          void *data)
  62{
  63        struct vc4_dev *vc4 = to_vc4_dev(dev);
  64
  65        struct vc4_debugfs_info_entry *entry =
  66                devm_kzalloc(dev->dev, sizeof(*entry), GFP_KERNEL);
  67
  68        if (!entry)
  69                return;
  70
  71        entry->info.name = name;
  72        entry->info.show = show;
  73        entry->info.data = data;
  74
  75        list_add(&entry->link, &vc4->debugfs_list);
  76}
  77
  78void vc4_debugfs_add_regset32(struct drm_device *drm,
  79                              const char *name,
  80                              struct debugfs_regset32 *regset)
  81{
  82        vc4_debugfs_add_file(drm, name, vc4_debugfs_regset32, regset);
  83}
  84