tequilaOS/platform_bootable_recovery
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Add support for controlling recovery brightness at exynos-compatible sysfs path

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Test: manual
Bug: 139537581
Exempt-From-Owner-Approval: wear branch
Change-Id: I163ea0d5e716c9fad28fb2c64306ed24362c53c7
(cherry picked from commit c9c5fcf8d6c9a6be7a5e07bcf94a3f841eaaca25)
(cherry picked from commit 526bd581bca75f93778eb773674773de21fe8f54)
This commit is contained in:
Lincoln Atkinson 2020-03-09 15:22:29 -07:00 committed by Shreerag Jayakrishnan
parent 01e576e61a
commit fcf4b6bca0
1 changed files with 15 additions and 2 deletions
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17
recovery_ui/ui.cpp
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@ -48,6 +48,10 @@ constexpr const char* MAX_BRIGHTNESS_FILE = "/sys/class/leds/lcd-backlight/max_b
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 @@ bool RecoveryUI::InitScreensaver() {
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