merlin: Add power HAL extension to disable big clusterHEADr11.1

* Also bring all big cluster cores online

Change-Id: I49f5f54fe0c5dde9148b910b0b617ee76d6abf78

3 files changed, 64 insertions, 0 deletions

diff --git a/BoardConfig.mk b/BoardConfig.mk
index 29bce50..7a74ba7 100644
--- a/BoardConfig.mk
+++ b/BoardConfig.mk
@@ -33,6 +33,9 @@ TARGET_PROCESS_SDK_VERSION_OVERRIDE := \
 # Display
 TARGET_SCREEN_DENSITY := 320
 
+# Power
+TARGET_POWERHAL_SET_INTERACTIVE_EXT := $(DEVICE_PATH)/power/power_ext.c
+
 # Kernel
 TARGET_KERNEL_CONFIG := merlin_defconfig
 
diff --git a/power/power_ext.c b/power/power_ext.c
new file mode 100644
index 0000000..f31350c
--- /dev/null
+++ b/power/power_ext.c
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2021 The LineageOS 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 <log/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 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.target.rc b/rootdir/etc/init.target.rc
index 89863fb..681bb3d 100644
--- a/rootdir/etc/init.target.rc
+++ b/rootdir/etc/init.target.rc
@@ -91,6 +91,14 @@ on property:sys.boot_completed=1
     write /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor "interactive"
     write /sys/devices/system/cpu/cpu0/cpufreq/interactive/io_is_busy 1
 
+    # Bring all big cluster cores online
+    write /sys/devices/system/cpu/cpu1/online 1
+    write /sys/devices/system/cpu/cpu2/online 1
+    write /sys/devices/system/cpu/cpu3/online 1
+
+    # Permission required for power HAL
+    chown system system /sys/devices/system/cpu/cpu0/core_ctl/max_cpus
+
     # enable governor for power cluster
     write /sys/devices/system/cpu/cpu4/online 1
     write /sys/devices/system/cpu/cpu4/cpufreq/scaling_governor "interactive"