diff options
Diffstat (limited to 'target/linux/goldfish/patches-2.6.30/0067-PM-Implement-early-suspend-api.patch')
| -rw-r--r-- | target/linux/goldfish/patches-2.6.30/0067-PM-Implement-early-suspend-api.patch | 244 |
1 files changed, 244 insertions, 0 deletions
diff --git a/target/linux/goldfish/patches-2.6.30/0067-PM-Implement-early-suspend-api.patch b/target/linux/goldfish/patches-2.6.30/0067-PM-Implement-early-suspend-api.patch new file mode 100644 index 0000000000..0fc0cc1bbf --- /dev/null +++ b/target/linux/goldfish/patches-2.6.30/0067-PM-Implement-early-suspend-api.patch @@ -0,0 +1,244 @@ +From 2d4a25785ad1aa51bad967543e1ab20e9ed4a046 Mon Sep 17 00:00:00 2001 +From: =?utf-8?q?Arve=20Hj=C3=B8nnev=C3=A5g?= <arve@android.com> +Date: Tue, 7 Oct 2008 20:48:01 -0700 +Subject: [PATCH 067/134] PM: Implement early suspend api + +--- + kernel/power/Kconfig | 12 +++ + kernel/power/Makefile | 1 + + kernel/power/earlysuspend.c | 178 +++++++++++++++++++++++++++++++++++++++++++ + kernel/power/power.h | 6 ++ + 4 files changed, 197 insertions(+), 0 deletions(-) + create mode 100644 kernel/power/earlysuspend.c + +--- a/kernel/power/Kconfig ++++ b/kernel/power/Kconfig +@@ -119,6 +119,9 @@ config SUSPEND_FREEZER + config HAS_WAKELOCK + bool + ++config HAS_EARLYSUSPEND ++ bool ++ + config WAKELOCK + bool "Wake lock" + depends on PM && RTC_CLASS +@@ -135,6 +138,15 @@ config WAKELOCK_STAT + ---help--- + Report wake lock stats in /proc/wakelocks + ++config EARLYSUSPEND ++ bool "Early suspend" ++ depends on WAKELOCK ++ default y ++ select HAS_EARLYSUSPEND ++ ---help--- ++ Call early suspend handlers when the user requested sleep state ++ changes. ++ + config HIBERNATION + bool "Hibernation (aka 'suspend to disk')" + depends on PM && SWAP && ARCH_HIBERNATION_POSSIBLE +--- a/kernel/power/Makefile ++++ b/kernel/power/Makefile +@@ -7,6 +7,7 @@ obj-$(CONFIG_PM) += main.o + obj-$(CONFIG_PM_SLEEP) += console.o + obj-$(CONFIG_FREEZER) += process.o + obj-$(CONFIG_WAKELOCK) += wakelock.o ++obj-$(CONFIG_EARLYSUSPEND) += earlysuspend.o + obj-$(CONFIG_HIBERNATION) += swsusp.o disk.o snapshot.o swap.o user.o + + obj-$(CONFIG_MAGIC_SYSRQ) += poweroff.o +--- /dev/null ++++ b/kernel/power/earlysuspend.c +@@ -0,0 +1,178 @@ ++/* kernel/power/earlysuspend.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/earlysuspend.h> ++#include <linux/module.h> ++#include <linux/mutex.h> ++#include <linux/rtc.h> ++#include <linux/syscalls.h> /* sys_sync */ ++#include <linux/wakelock.h> ++#include <linux/workqueue.h> ++ ++#include "power.h" ++ ++enum { ++ DEBUG_USER_STATE = 1U << 0, ++ DEBUG_SUSPEND = 1U << 2, ++}; ++static int debug_mask = DEBUG_USER_STATE; ++module_param_named(debug_mask, debug_mask, int, S_IRUGO | S_IWUSR | S_IWGRP); ++ ++static DEFINE_MUTEX(early_suspend_lock); ++static LIST_HEAD(early_suspend_handlers); ++static void early_suspend(struct work_struct *work); ++static void late_resume(struct work_struct *work); ++static DECLARE_WORK(early_suspend_work, early_suspend); ++static DECLARE_WORK(late_resume_work, late_resume); ++static DEFINE_SPINLOCK(state_lock); ++enum { ++ SUSPEND_REQUESTED = 0x1, ++ SUSPENDED = 0x2, ++ SUSPEND_REQUESTED_AND_SUSPENDED = SUSPEND_REQUESTED | SUSPENDED, ++}; ++static int state; ++ ++void register_early_suspend(struct early_suspend *handler) ++{ ++ struct list_head *pos; ++ ++ mutex_lock(&early_suspend_lock); ++ list_for_each(pos, &early_suspend_handlers) { ++ struct early_suspend *e; ++ e = list_entry(pos, struct early_suspend, link); ++ if (e->level > handler->level) ++ break; ++ } ++ list_add_tail(&handler->link, pos); ++ if ((state & SUSPENDED) && handler->suspend) ++ handler->suspend(handler); ++ mutex_unlock(&early_suspend_lock); ++} ++EXPORT_SYMBOL(register_early_suspend); ++ ++void unregister_early_suspend(struct early_suspend *handler) ++{ ++ mutex_lock(&early_suspend_lock); ++ list_del(&handler->link); ++ mutex_unlock(&early_suspend_lock); ++} ++EXPORT_SYMBOL(unregister_early_suspend); ++ ++static void early_suspend(struct work_struct *work) ++{ ++ struct early_suspend *pos; ++ unsigned long irqflags; ++ int abort = 0; ++ ++ mutex_lock(&early_suspend_lock); ++ spin_lock_irqsave(&state_lock, irqflags); ++ if (state == SUSPEND_REQUESTED) ++ state |= SUSPENDED; ++ else ++ abort = 1; ++ spin_unlock_irqrestore(&state_lock, irqflags); ++ ++ if (abort) { ++ if (debug_mask & DEBUG_SUSPEND) ++ pr_info("early_suspend: abort, state %d\n", state); ++ mutex_unlock(&early_suspend_lock); ++ goto abort; ++ } ++ ++ if (debug_mask & DEBUG_SUSPEND) ++ pr_info("early_suspend: call handlers\n"); ++ list_for_each_entry(pos, &early_suspend_handlers, link) { ++ if (pos->suspend != NULL) ++ pos->suspend(pos); ++ } ++ mutex_unlock(&early_suspend_lock); ++ ++ if (debug_mask & DEBUG_SUSPEND) ++ pr_info("early_suspend: sync\n"); ++ ++ sys_sync(); ++abort: ++ spin_lock_irqsave(&state_lock, irqflags); ++ if (state == SUSPEND_REQUESTED_AND_SUSPENDED) ++ wake_unlock(&main_wake_lock); ++ spin_unlock_irqrestore(&state_lock, irqflags); ++} ++ ++static void late_resume(struct work_struct *work) ++{ ++ struct early_suspend *pos; ++ unsigned long irqflags; ++ int abort = 0; ++ ++ mutex_lock(&early_suspend_lock); ++ spin_lock_irqsave(&state_lock, irqflags); ++ if (state == SUSPENDED) ++ state &= ~SUSPENDED; ++ else ++ abort = 1; ++ spin_unlock_irqrestore(&state_lock, irqflags); ++ ++ if (abort) { ++ if (debug_mask & DEBUG_SUSPEND) ++ pr_info("late_resume: abort, state %d\n", state); ++ goto abort; ++ } ++ if (debug_mask & DEBUG_SUSPEND) ++ pr_info("late_resume: call handlers\n"); ++ list_for_each_entry_reverse(pos, &early_suspend_handlers, link) ++ if (pos->resume != NULL) ++ pos->resume(pos); ++ if (debug_mask & DEBUG_SUSPEND) ++ pr_info("late_resume: done\n"); ++abort: ++ mutex_unlock(&early_suspend_lock); ++} ++ ++void request_suspend_state(suspend_state_t new_state) ++{ ++ unsigned long irqflags; ++ int old_sleep; ++ ++ spin_lock_irqsave(&state_lock, irqflags); ++ old_sleep = state & SUSPEND_REQUESTED; ++ if (debug_mask & DEBUG_USER_STATE) { ++ struct timespec ts; ++ struct rtc_time tm; ++ getnstimeofday(&ts); ++ rtc_time_to_tm(ts.tv_sec, &tm); ++ pr_info("request_suspend_state: %s (%d->%d) at %lld " ++ "(%d-%02d-%02d %02d:%02d:%02d.%09lu UTC)\n", ++ new_state != PM_SUSPEND_ON ? "sleep" : "wakeup", ++ requested_suspend_state, new_state, ++ ktime_to_ns(ktime_get()), ++ tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, ++ tm.tm_hour, tm.tm_min, tm.tm_sec, ts.tv_nsec); ++ } ++ if (!old_sleep && new_state != PM_SUSPEND_ON) { ++ state |= SUSPEND_REQUESTED; ++ queue_work(suspend_work_queue, &early_suspend_work); ++ } else if (old_sleep && new_state == PM_SUSPEND_ON) { ++ state &= ~SUSPEND_REQUESTED; ++ wake_lock(&main_wake_lock); ++ queue_work(suspend_work_queue, &late_resume_work); ++ } ++ requested_suspend_state = new_state; ++ spin_unlock_irqrestore(&state_lock, irqflags); ++} ++ ++suspend_state_t get_suspend_state(void) ++{ ++ return requested_suspend_state; ++} +--- a/kernel/power/power.h ++++ b/kernel/power/power.h +@@ -230,3 +230,9 @@ extern struct workqueue_struct *suspend_ + extern struct wake_lock main_wake_lock; + extern suspend_state_t requested_suspend_state; + #endif ++ ++#ifdef CONFIG_EARLYSUSPEND ++/* kernel/power/earlysuspend.c */ ++void request_suspend_state(suspend_state_t state); ++suspend_state_t get_suspend_state(void); ++#endif |