commit 1683a95f8a02ab3c13b1ad05fbe78a5350a3081b
author TreeHugger Robot <treehugger-gerrit@google.com> Fri Dec 04 00:11:11 2020 +0000
committer Android (Google) Code Review <android-gerrit@google.com> Fri Dec 04 00:11:11 2020 +0000
tree 875a453bd7f8c4800737354c47dd4f4f9335faf3
parent 3bb3569d1a52a10e1ad6110a03475a2b3d15510a
parent fcf4b6bca0b628ec757d6d231212c45a9a3a6b86

Merge "Add support for controlling recovery brightness at exynos-compatible sysfs path"

recovery_ui/ui.cpp

diff --git a/recovery_ui/ui.cpp b/recovery_ui/ui.cpp
index 3307217..6e67b1d 100644
--- a/recovery_ui/ui.cpp
+++ b/recovery_ui/ui.cpp
@@ -48,6 +48,10 @@
 constexpr const char* BRIGHTNESS_FILE_SDM = "/sys/class/backlight/panel0-backlight/brightness";
 constexpr const char* MAX_BRIGHTNESS_FILE_SDM =
     "/sys/class/backlight/panel0-backlight/max_brightness";
+constexpr const char* BRIGHTNESS_FILE_PWM =
+    "/sys/class/backlight/pwm-backlight.0/brightness";
+constexpr const char* MAX_BRIGHTNESS_FILE_PWM =
+    "/sys/class/backlight/pwm-backlight.0/max_brightness";
 
 constexpr int kDefaultTouchLowThreshold = 50;
 constexpr int kDefaultTouchHighThreshold = 90;
@@ -106,10 +110,19 @@
     return false;
   }
   if (access(brightness_file_.c_str(), R_OK | W_OK)) {
-    brightness_file_ = BRIGHTNESS_FILE_SDM;
+    if (!access(BRIGHTNESS_FILE_SDM, R_OK | W_OK)) {
+      brightness_file_ = BRIGHTNESS_FILE_SDM;
+    } else {
+      brightness_file_ = BRIGHTNESS_FILE_PWM;
+    }
   }
+
   if (access(max_brightness_file_.c_str(), R_OK)) {
-    max_brightness_file_ = MAX_BRIGHTNESS_FILE_SDM;
+    if (!access(MAX_BRIGHTNESS_FILE_SDM, R_OK)) {
+      max_brightness_file_ = MAX_BRIGHTNESS_FILE_SDM;
+    } else {
+      max_brightness_file_ = MAX_BRIGHTNESS_FILE_PWM;
+    }
   }
   // Set the initial brightness level based on the max brightness. Note that reading the initial
   // value from BRIGHTNESS_FILE doesn't give the actual brightness value (bullhead, sailfish), so