mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-24 19:41:53 +02:00
2d581e6047
git-svn-id: svn://svn.openwrt.org/openwrt/trunk@16459 3c298f89-4303-0410-b956-a3cf2f4a3e73
134 lines
4.0 KiB
Diff
134 lines
4.0 KiB
Diff
From 0083b2afe89dea4a06bfd967b164318ad0bccd11 Mon Sep 17 00:00:00 2001
|
|
From: =?utf-8?q?Arve=20Hj=C3=B8nnev=C3=A5g?= <arve@android.com>
|
|
Date: Wed, 15 Oct 2008 17:52:20 -0700
|
|
Subject: [PATCH 071/134] PM: earlysuspend: Add console switch when user requested sleep state changes.
|
|
MIME-Version: 1.0
|
|
Content-Type: text/plain; charset=utf-8
|
|
Content-Transfer-Encoding: 8bit
|
|
|
|
Signed-off-by: Arve Hjønnevåg <arve@android.com>
|
|
---
|
|
kernel/power/Kconfig | 17 ++++++++
|
|
kernel/power/Makefile | 1 +
|
|
kernel/power/consoleearlysuspend.c | 78 ++++++++++++++++++++++++++++++++++++
|
|
3 files changed, 96 insertions(+), 0 deletions(-)
|
|
create mode 100644 kernel/power/consoleearlysuspend.c
|
|
|
|
--- a/kernel/power/Kconfig
|
|
+++ b/kernel/power/Kconfig
|
|
@@ -157,6 +157,23 @@ config EARLYSUSPEND
|
|
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
|
|
--- a/kernel/power/Makefile
|
|
+++ b/kernel/power/Makefile
|
|
@@ -9,6 +9,7 @@ obj-$(CONFIG_FREEZER) += process.o
|
|
obj-$(CONFIG_WAKELOCK) += wakelock.o
|
|
obj-$(CONFIG_USER_WAKELOCK) += userwakelock.o
|
|
obj-$(CONFIG_EARLYSUSPEND) += earlysuspend.o
|
|
+obj-$(CONFIG_CONSOLE_EARLYSUSPEND) += consoleearlysuspend.o
|
|
obj-$(CONFIG_HIBERNATION) += swsusp.o disk.o snapshot.o swap.o user.o
|
|
|
|
obj-$(CONFIG_MAGIC_SYSRQ) += poweroff.o
|
|
--- /dev/null
|
|
+++ b/kernel/power/consoleearlysuspend.c
|
|
@@ -0,0 +1,78 @@
|
|
+/* 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);
|
|
+
|