From cadd0be0896dcf4af2b263350261cfa9dc98c7da Mon Sep 17 00:00:00 2001 From: Adrian DC Date: Sun, 14 Aug 2016 11:44:31 +0200 Subject: cm: charger: Add support for double backlight displays * Some devices using AMS AS36xx LEDs controllers are using 2 backlight paths to light the display, mostly on Sony Huashan and Sony Blue board devices * Although most of the displays have interlaced backlights and the half dark path can be hard to see, other displays have a top / bottom path that make half the screen on / off * Control the backlight level of both path if the device does have BACKLIGHT_PATH set, and if present, SECONDARY_BACKLIGHT_PATH * Leave the HEALTD_BACKLIGHT_LEVEL config accessible to override the default 100 / 255 brightness used in healthd Change-Id: If774c3e66acedddf7ba676581e7c88b7e83a66b6 Signed-off-by: Adrian DC --- charger/Android.mk | 9 +++++++++ charger/healthd_board_cm.cpp | 40 ++++++++++++++++++++++++++++++++++++++++ 2 files changed, 49 insertions(+) (limited to 'charger') diff --git a/charger/Android.mk b/charger/Android.mk index 0f5e55f..0492ad9 100644 --- a/charger/Android.mk +++ b/charger/Android.mk @@ -7,6 +7,15 @@ LOCAL_CFLAGS := -Werror LOCAL_C_INCLUDES := \ system/core/healthd \ bootable/recovery +ifneq ($(BACKLIGHT_PATH),) + LOCAL_CFLAGS += -DHEALTHD_BACKLIGHT_PATH=\"$(BACKLIGHT_PATH)\" +endif +ifneq ($(SECONDARY_BACKLIGHT_PATH),) + LOCAL_CFLAGS += -DHEALTHD_SECONDARY_BACKLIGHT_PATH=\"$(SECONDARY_BACKLIGHT_PATH)\" +endif +ifneq ($(HEALTHD_BACKLIGHT_LEVEL),) + LOCAL_CFLAGS += -DHEALTHD_BACKLIGHT_LEVEL=$(HEALTHD_BACKLIGHT_LEVEL) +endif include $(BUILD_STATIC_LIBRARY) include $(CLEAR_VARS) diff --git a/charger/healthd_board_cm.cpp b/charger/healthd_board_cm.cpp index c5aa3e6..8d38e5a 100644 --- a/charger/healthd_board_cm.cpp +++ b/charger/healthd_board_cm.cpp @@ -365,9 +365,49 @@ void healthd_board_mode_charger_battery_update( { } +#ifdef HEALTHD_BACKLIGHT_PATH +#ifndef HEALTHD_BACKLIGHT_LEVEL +#define HEALTHD_BACKLIGHT_LEVEL 100 +#endif + +void healthd_board_mode_charger_set_backlight(bool on) +{ + int fd; + char buffer[10]; + + memset(buffer, '\0', sizeof(buffer)); + fd = open(HEALTHD_BACKLIGHT_PATH, O_RDWR); + if (fd < 0) { + LOGE("Could not open backlight node : %s\n", strerror(errno)); + return; + } + LOGV("Enabling backlight\n"); + snprintf(buffer, sizeof(buffer), "%d\n", on ? HEALTHD_BACKLIGHT_LEVEL : 0); + if (write(fd, buffer, strlen(buffer)) < 0) { + LOGE("Could not write to backlight : %s\n", strerror(errno)); + } + close(fd); + +#ifdef HEALTHD_SECONDARY_BACKLIGHT_PATH + fd = open(HEALTHD_SECONDARY_BACKLIGHT_PATH, O_RDWR); + if (fd < 0) { + LOGE("Could not open second backlight node : %s\n", strerror(errno)); + return; + } + LOGV("Enabling secondary backlight\n"); + if (write(fd, buffer, strlen(buffer)) < 0) { + LOGE("Could not write to second backlight : %s\n", strerror(errno)); + return; + } + close(fd); +#endif +} + +#else void healthd_board_mode_charger_set_backlight(bool) { } +#endif void healthd_board_mode_charger_init(void) { -- cgit v1.1