powerhal: Add set_profile support

Change-Id: I0d7fb8c5a7e5e06c300cbb4b78b6e1013d7bff6a
Signed-off-by: Andreas Schneider <asn@cryptomilk.org>

power/power.c

@@ -58,8 +58,12 @@ struct samsung_power_module {
     bool touchkey_blocked;
 };
 
-/* POWER_HINT_LOW_POWER */
-static bool low_power_mode = false;
+enum power_profile_e {
+    PROFILE_POWER_SAVE = 0,
+    PROFILE_BALANCED,
+    PROFILE_HIGH_PERFORMANCE
+};
+static enum power_profile_e current_power_profile = PROFILE_BALANCED;
 
 /**********************************************************
  *** HELPER FUNCTIONS
@@ -140,6 +144,51 @@ static int boostpulse_open(struct samsung_power_module *samsung_pwr)
     return samsung_pwr->boostpulse_fd;
 }
 
+static void set_power_profile(struct samsung_power_module *samsung_pwr,
+                              enum power_profile_e profile)
+{
+    int rc;
+    struct stat sb;
+
+    if (current_power_profile == profile) {
+        return;
+    }
+
+    ALOGV("%s: profile=%d", __func__, profile);
+
+    switch (profile) {
+        case PROFILE_POWER_SAVE:
+            // Limit to hispeed freq
+            sysfs_write(CPU0_MAX_FREQ_PATH, samsung_pwr->cpu0_hispeed_freq);
+            rc = stat(CPU4_MAX_FREQ_PATH, &sb);
+            if (rc == 0) {
+                sysfs_write(CPU4_MAX_FREQ_PATH, samsung_pwr->cpu4_hispeed_freq);
+            }
+            ALOGD("%s: set powersave mode", __func__);
+            break;
+        case PROFILE_BALANCED:
+            // Restore normal max freq
+            sysfs_write(CPU0_MAX_FREQ_PATH, samsung_pwr->cpu0_max_freq);
+            rc = stat(CPU4_MAX_FREQ_PATH, &sb);
+            if (rc == 0) {
+                sysfs_write(CPU4_MAX_FREQ_PATH, samsung_pwr->cpu4_max_freq);
+            }
+            ALOGD("%s: set balanced mode", __func__);
+            break;
+        case PROFILE_HIGH_PERFORMANCE:
+            // Restore normal max freq
+            sysfs_write(CPU0_MAX_FREQ_PATH, samsung_pwr->cpu0_max_freq);
+            rc = stat(CPU4_MAX_FREQ_PATH, &sb);
+            if (rc == 0) {
+                sysfs_write(CPU4_MAX_FREQ_PATH, samsung_pwr->cpu4_max_freq);
+            }
+            ALOGD("%s: set performance mode", __func__);
+            break;
+    }
+
+    current_power_profile = profile;
+}
+
 static void find_input_nodes(struct samsung_power_module *samsung_pwr, char *dir)
 {
     const char filename[] = "name";
@@ -373,6 +422,13 @@ static void samsung_power_hint(struct power_module *module,
 
     switch (hint) {
         case POWER_HINT_INTERACTION: {
+            char errno_str[64];
+            ssize_t len;
+            int fd;
+
+            if (current_power_profile == PROFILE_POWER_SAVE) {
+                return;
+            }
 
             ALOGV("%s: POWER_HINT_INTERACTION", __func__);
 
@@ -390,38 +446,14 @@ static void samsung_power_hint(struct power_module *module,
         case POWER_HINT_VSYNC: {
 
             ALOGV("%s: POWER_HINT_VSYNC", __func__);
-
             break;
         }
-        case POWER_HINT_LOW_POWER: {
-            int rc;
-            struct stat sb;
+        case POWER_HINT_SET_PROFILE: {
+            int profile = *((intptr_t *)data);
 
-            ALOGV("%s: POWER_HINT_LOW_POWER", __func__);
+            ALOGV("%s: POWER_HINT_SET_PROFILE", __func__);
 
-            pthread_mutex_lock(&samsung_pwr->lock);
-
-            /*
-             * TODO: We fail to restore the max freqs after low power mode has been
-             * disabled for some reason (big.LITTLE specific issue?)
-             *
-            if (data) {
-                sysfs_write(CPU0_MAX_FREQ_PATH, samsung_pwr->cpu0_hispeed_freq);
-                rc = stat(CPU4_MAX_FREQ_PATH, &sb);
-                if (rc == 0) {
-                    sysfs_write(CPU4_MAX_FREQ_PATH, samsung_pwr->cpu4_hispeed_freq);
-                }
-            } else {
-                sysfs_write(CPU0_MAX_FREQ_PATH, samsung_pwr->cpu0_max_freq);
-                rc = stat(CPU4_MAX_FREQ_PATH, &sb);
-                if (rc == 0) {
-                    sysfs_write(CPU4_MAX_FREQ_PATH, samsung_pwr->cpu4_max_freq);
-                }
-            }
-            */
-            low_power_mode = data;
-
-            pthread_mutex_unlock(&samsung_pwr->lock);
+            set_power_profile(samsung_pwr, profile);
             break;
         }
         default:
@@ -429,6 +461,16 @@ static void samsung_power_hint(struct power_module *module,
     }
 }
 
+static int samsung_get_feature(struct power_module *module __unused,
+                               feature_t feature)
+{
+    if (feature == POWER_FEATURE_SUPPORTED_PROFILES) {
+        return 3;
+    }
+
+    return -1;
+}
+
 static struct hw_module_methods_t power_module_methods = {
     .open = NULL,
 };
@@ -448,6 +490,7 @@ struct samsung_power_module HAL_MODULE_INFO_SYM = {
         .init = samsung_power_init,
         .setInteractive = samsung_power_set_interactive,
         .powerHint = samsung_power_hint,
+        .getFeature = samsung_get_feature
     },
 
     .lock = PTHREAD_MUTEX_INITIALIZER,