Call early suspend handlers when the user requested sleep state
changes.
-choice
- prompt "User-space screen access"
- default CONSOLE_EARLYSUSPEND
- depends on HAS_EARLYSUSPEND
-
- config NO_USER_SPACE_SCREEN_ACCESS_CONTROL
- bool "None"
-
- config CONSOLE_EARLYSUSPEND
- bool "Console switch on early-suspend"
- depends on HAS_EARLYSUSPEND && VT
- ---help---
- Register early suspend handler to perform a console switch to
- when user-space should stop drawing to the screen and a switch
- back when it should resume.
-endchoice
-
config HIBERNATION
bool "Hibernation (aka 'suspend to disk')"
depends on PM && SWAP && ARCH_HIBERNATION_POSSIBLE
+++ /dev/null
-/* kernel/power/consoleearlysuspend.c
- *
- * Copyright (C) 2005-2008 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- */
-
-#include <linux/console.h>
-#include <linux/earlysuspend.h>
-#include <linux/kbd_kern.h>
-#include <linux/module.h>
-#include <linux/vt_kern.h>
-#include <linux/wait.h>
-
-#define EARLY_SUSPEND_CONSOLE (MAX_NR_CONSOLES-1)
-
-static int orig_fgconsole;
-static void console_early_suspend(struct early_suspend *h)
-{
- acquire_console_sem();
- orig_fgconsole = fg_console;
- if (vc_allocate(EARLY_SUSPEND_CONSOLE))
- goto err;
- if (set_console(EARLY_SUSPEND_CONSOLE))
- goto err;
- release_console_sem();
-
- if (vt_waitactive(EARLY_SUSPEND_CONSOLE))
- pr_warning("console_early_suspend: Can't switch VCs.\n");
- return;
-err:
- pr_warning("console_early_suspend: Can't set console\n");
- release_console_sem();
-}
-
-static void console_late_resume(struct early_suspend *h)
-{
- int ret;
- acquire_console_sem();
- ret = set_console(orig_fgconsole);
- release_console_sem();
- if (ret) {
- pr_warning("console_late_resume: Can't set console.\n");
- return;
- }
-
- if (vt_waitactive(orig_fgconsole))
- pr_warning("console_late_resume: Can't switch VCs.\n");
-}
-
-static struct early_suspend console_early_suspend_desc = {
- .level = EARLY_SUSPEND_LEVEL_STOP_DRAWING,
- .suspend = console_early_suspend,
- .resume = console_late_resume,
-};
-
-static int __init console_early_suspend_init(void)
-{
- register_early_suspend(&console_early_suspend_desc);
- return 0;
-}
-
-static void __exit console_early_suspend_exit(void)
-{
- unregister_early_suspend(&console_early_suspend_desc);
-}
-
-module_init(console_early_suspend_init);
-module_exit(console_early_suspend_exit);
-