add the 'goldfish' target, useful for experimenting with virtual phone hardware ...

[openwrt/svn-archive/archive.git] / target / linux / goldfish / patches-2.6.30 / 0071-PM-earlysuspend-Add-console-switch-when-user-reque.patch

diff --git a/target/linux/goldfish/patches-2.6.30/0071-PM-earlysuspend-Add-console-switch-when-user-reque.patch b/target/linux/goldfish/patches-2.6.30/0071-PM-earlysuspend-Add-console-switch-when-user-reque.patch
new file mode 100644 (file)
index 0000000..602b924
--- /dev/null
+++ b/target/linux/goldfish/patches-2.6.30/0071-PM-earlysuspend-Add-console-switch-when-user-reque.patch
@@ -0,0 +1,133 @@
+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);
++