msm8939: Add power HAL extension to disable big cluster

* Taken from oppo msm8939
* Tweak min_cpus to match oppo msm8939 as well

Change-Id: Ice639dc225543a1d78e9dfca7382d2e40ceb5d0c

5 files changed, 60 insertions, 2 deletions

diff --git a/board/00-qcom-platform-msm8916.mk b/board/00-qcom-platform-msm8916.mk
index fb55341..758ce1e 100644
--- a/board/00-qcom-platform-msm8916.mk
+++ b/board/00-qcom-platform-msm8916.mk
@@ -34,6 +34,9 @@ TARGET_RECOVERY_DEVICE_MODULES := libinit_msm8916
 # Qualcomm support
 BOARD_USES_QCOM_HARDWARE := true
 BOARD_USES_QC_TIME_SERVICES := true
+ifeq ($(TARGET_BOARD_PLATFORM_VARIANT),msm8939)
+TARGET_POWERHAL_SET_INTERACTIVE_EXT := $(PLATFORM_PATH)/power/power_ext.c
+endif
 TARGET_POWERHAL_VARIANT := qcom
 TARGET_RIL_VARIANT := caf
 MALLOC_SVELTE := true
diff --git a/power/power_ext.c b/power/power_ext.c
new file mode 100644
index 0000000..1f85d8d
--- /dev/null
+++ b/power/power_ext.c
@@ -0,0 +1,52 @@
+/*
+ * Copyright (c) 2016 The CyanogenMod Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+#include <fcntl.h>
+
+#define LOG_TAG "PowerHAL_MSM8939_Ext"
+#include <utils/Log.h>
+
+#define BIG_MAX_CPU_PATH "/sys/devices/system/cpu/cpu0/core_ctl/max_cpus"
+
+static void sysfs_write(char *path, char *s)
+{
+    char buf[80];
+    int len;
+    int fd;
+
+    if ((fd = open(path, O_WRONLY)) < 0) {
+        strerror_r(errno, buf, sizeof(buf));
+        ALOGE("Error opening %s: %s\n", path, buf);
+        return;
+    }
+
+    len = write(fd, s, strlen(s));
+    if (len < 0) {
+        strerror_r(errno, buf, sizeof(buf));
+        ALOGE("Error writing to %s: %s\n", path, buf);
+    }
+
+    close(fd);
+}
+
+void cm_power_set_interactive_ext(int on)
+{
+    ALOGD("%sabling big CPU cluster", on ? "En" : "Dis");
+    sysfs_write(BIG_MAX_CPU_PATH, on ? "4" : "0");
+}
diff --git a/rootdir/etc/init.qcom.power_msm8916.rc b/rootdir/etc/init.qcom.power_msm8916.rc
index b1db54d..65ca55a 100644
--- a/rootdir/etc/init.qcom.power_msm8916.rc
+++ b/rootdir/etc/init.qcom.power_msm8916.rc
@@ -41,8 +41,8 @@ on enable-low-power
     write /sys/class/net/rmnet0/queues/rx-0/rps_cpus 2
 
     # Enable core control
+    write /sys/devices/system/cpu/cpu0/core_ctl/min_cpus 0
     write /sys/devices/system/cpu/cpu0/core_ctl/max_cpus 4
-    write /sys/devices/system/cpu/cpu0/core_ctl/min_cpus 1
     write /sys/devices/system/cpu/cpu0/core_ctl/busy_up_thres 68
     write /sys/devices/system/cpu/cpu0/core_ctl/busy_down_thres 30
     write /sys/devices/system/cpu/cpu0/core_ctl/offline_delay_ms 100
diff --git a/rootdir/etc/init.qcom.power_msm8939.rc b/rootdir/etc/init.qcom.power_msm8939.rc
index e256ef7..4c6c333 100644
--- a/rootdir/etc/init.qcom.power_msm8939.rc
+++ b/rootdir/etc/init.qcom.power_msm8939.rc
@@ -55,7 +55,7 @@ on enable-low-power
     write /sys/module/msm_thermal/core_control/enabled 1
 
     # Enable core control
-    write /sys/devices/system/cpu/cpu0/core_ctl/min_cpus 2
+    write /sys/devices/system/cpu/cpu0/core_ctl/min_cpus 0
     write /sys/devices/system/cpu/cpu0/core_ctl/max_cpus 4
     write /sys/devices/system/cpu/cpu0/core_ctl/busy_up_thres 68
     write /sys/devices/system/cpu/cpu0/core_ctl/busy_down_thres 40
diff --git a/rootdir/etc/init.qcom.rc b/rootdir/etc/init.qcom.rc
index 3937d50..46219b7 100644
--- a/rootdir/etc/init.qcom.rc
+++ b/rootdir/etc/init.qcom.rc
@@ -268,6 +268,9 @@ on boot
     chown system graphics /sys/class/graphics/fb0/mode
     chown system graphics /sys/class/graphics/fb0/modes
 
+    # Permissions required for power HAL
+    chown system system /sys/devices/system/cpu/cpu0/core_ctl/max_cpus
+
 on property:bluetooth.isEnabled=true
     write /sys/class/bluetooth/hci0/idle_timeout 7000