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https://github.com/team-infusion-developers/android_hardware_samsung.git
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s5pc110: Add Power HAL (userspace CPU boosting)
The majority of this commit is by Steve Kondik for the D2, modified by Daniel Bateman and me. Change-Id: Id6c1a1f0c6b39d5d20a765545526c07ad0fc64f6
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parent
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commit
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3 changed files with 186 additions and 1 deletions
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@ -17,7 +17,7 @@
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ifeq ($(TARGET_BOARD_PLATFORM),s5pc110)
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# audio, camera, sensor and light HALs are device specifc
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s5pc110_dirs := libhwcomposer libs3cjpeg libstagefrighthw sec_mm
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s5pc110_dirs := libhwcomposer libs3cjpeg libstagefrighthw sec_mm power
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include $(call all-named-subdir-makefiles,$(s5pc110_dirs))
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27
exynos3/s5pc110/power/Android.mk
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27
exynos3/s5pc110/power/Android.mk
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# Copyright (C) 2012 The Android Open Source Project
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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LOCAL_PATH := $(call my-dir)
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# HAL module implemenation stored in
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# hw/<POWERS_HARDWARE_MODULE_ID>.<ro.hardware>.so
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include $(CLEAR_VARS)
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LOCAL_MODULE_PATH := $(TARGET_OUT_SHARED_LIBRARIES)/hw
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LOCAL_SHARED_LIBRARIES := liblog libcutils
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LOCAL_SRC_FILES := power.c
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LOCAL_MODULE := power.$(TARGET_BOARD_PLATFORM)
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LOCAL_MODULE_TAGS := optional
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include $(BUILD_SHARED_LIBRARY)
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158
exynos3/s5pc110/power/power.c
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158
exynos3/s5pc110/power/power.c
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@ -0,0 +1,158 @@
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/*
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* Copyright (C) 2012 The Android Open Source Project
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* Copyright (C) 2012 The CyanogenMod Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <errno.h>
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#include <string.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#define LOG_TAG "PowerHAL"
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#include <cutils/properties.h>
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#include <utils/Log.h>
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#include <hardware/hardware.h>
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#include <hardware/power.h>
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#define BOOSTPULSE_PATH "/sys/devices/system/cpu/cpufreq/ondemand/boostpulse"
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#define SAMPLING_RATE_ONDEMAND "/sys/devices/system/cpu/cpufreq/ondemand/sampling_rate"
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#define SAMPLING_RATE_SCREEN_ON "40000"
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#define SAMPLING_RATE_SCREEN_OFF "400000"
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struct s5pc110_power_module {
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struct power_module base;
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pthread_mutex_t lock;
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int boostpulse_fd;
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int boostpulse_warned;
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char sampling_rate_screen_on[PROPERTY_VALUE_MAX];
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char sampling_rate_screen_off[PROPERTY_VALUE_MAX];
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};
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static void sysfs_write(char *path, char *s)
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{
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char buf[80];
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int len;
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int fd = open(path, O_WRONLY);
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if (fd < 0) {
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strerror_r(errno, buf, sizeof(buf));
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ALOGE("Error opening %s: %s\n", path, buf);
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return;
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}
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len = write(fd, s, strlen(s));
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if (len < 0) {
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strerror_r(errno, buf, sizeof(buf));
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ALOGE("Error writing to %s: %s\n", path, buf);
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}
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close(fd);
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}
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static int boostpulse_open(struct s5pc110_power_module *s5pc110)
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{
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char buf[80];
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pthread_mutex_lock(&s5pc110->lock);
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if (s5pc110->boostpulse_fd < 0) {
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s5pc110->boostpulse_fd = open(BOOSTPULSE_PATH, O_WRONLY);
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if (s5pc110->boostpulse_fd < 0) {
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if (!s5pc110->boostpulse_warned) {
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strerror_r(errno, buf, sizeof(buf));
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ALOGE("Error opening %s: %s\n", BOOSTPULSE_PATH, buf);
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s5pc110->boostpulse_warned = 1;
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}
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}
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}
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pthread_mutex_unlock(&s5pc110->lock);
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return s5pc110->boostpulse_fd;
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}
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static void s5pc110_power_hint(struct power_module *module, power_hint_t hint,
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void *data)
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{
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struct s5pc110_power_module *s5pc110 = (struct s5pc110_power_module *) module;
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char buf[80];
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int len;
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int duration = 1;
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switch (hint) {
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case POWER_HINT_INTERACTION:
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case POWER_HINT_CPU_BOOST:
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if (boostpulse_open(s5pc110) >= 0) {
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if (data != NULL)
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duration = (int) data;
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snprintf(buf, sizeof(buf), "%d", duration);
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len = write(s5pc110->boostpulse_fd, buf, strlen(buf));
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if (len < 0) {
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strerror_r(errno, buf, sizeof(buf));
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ALOGE("Error writing to %s: %s\n", BOOSTPULSE_PATH, buf);
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}
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}
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break;
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case POWER_HINT_VSYNC:
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break;
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default:
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break;
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}
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}
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static void s5pc110_power_set_interactive(struct power_module *module, int on)
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{
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struct s5pc110_power_module *s5pc110 = (struct s5pc110_power_module *) module;
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sysfs_write(SAMPLING_RATE_ONDEMAND,
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on ? s5pc110->sampling_rate_screen_on : s5pc110->sampling_rate_screen_off);
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}
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static void s5pc110_power_init(struct power_module *module)
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{
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struct s5pc110_power_module *s5pc110 = (struct s5pc110_power_module *) module;
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property_get("ro.sys.sampling_rate_on", s5pc110->sampling_rate_screen_on, SAMPLING_RATE_SCREEN_ON);
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property_get("ro.sys.sampling_rate_off", s5pc110->sampling_rate_screen_off, SAMPLING_RATE_SCREEN_OFF);
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sysfs_write(SAMPLING_RATE_ONDEMAND, s5pc110->sampling_rate_screen_on);
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}
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static struct hw_module_methods_t power_module_methods = {
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.open = NULL,
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};
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struct s5pc110_power_module HAL_MODULE_INFO_SYM = {
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base: {
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common: {
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tag: HARDWARE_MODULE_TAG,
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module_api_version: POWER_MODULE_API_VERSION_0_2,
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hal_api_version: HARDWARE_HAL_API_VERSION,
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id: POWER_HARDWARE_MODULE_ID,
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name: "S5PC110 Power HAL",
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author: "The Android Open Source Project",
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methods: &power_module_methods,
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},
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init: s5pc110_power_init,
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setInteractive: s5pc110_power_set_interactive,
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powerHint: s5pc110_power_hint,
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},
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lock: PTHREAD_MUTEX_INITIALIZER,
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boostpulse_fd: -1,
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boostpulse_warned: 0,
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};
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