fix: battery runtime estimation with negative sysfs values

Some drivers (example: qualcomm-battmgr, present on Snapdragon X1
laptops) expose the current_now and power_now values in sysfs as
negative int when the device is discharging, positive when charging.

This breaks the battery runtime estimation in Waybar, as it expects a
uint32 for power_now.

Change the battery module to use the absolute values of current_now and
power_now.
This commit is contained in:
Anthony Ruhier
2025-02-16 18:23:59 +01:00
parent c32d5e3883
commit 4be1f3bf42

View File

@ -273,14 +273,18 @@ waybar::modules::Battery::getInfos() {
// Scale these by the voltage to get μW/μWh. // Scale these by the voltage to get μW/μWh.
uint32_t current_now = 0; uint32_t current_now = 0;
int32_t _current_now_int = 0;
bool current_now_exists = false; bool current_now_exists = false;
if (fs::exists(bat / "current_now")) { if (fs::exists(bat / "current_now")) {
current_now_exists = true; current_now_exists = true;
std::ifstream(bat / "current_now") >> current_now; std::ifstream(bat / "current_now") >> _current_now_int;
} else if (fs::exists(bat / "current_avg")) { } else if (fs::exists(bat / "current_avg")) {
current_now_exists = true; current_now_exists = true;
std::ifstream(bat / "current_avg") >> current_now; std::ifstream(bat / "current_avg") >> _current_now_int;
} }
// Documentation ABI allows a negative value when discharging, positive
// value when charging.
current_now = std::abs(_current_now_int);
if (fs::exists(bat / "time_to_empty_now")) { if (fs::exists(bat / "time_to_empty_now")) {
time_to_empty_now_exists = true; time_to_empty_now_exists = true;
@ -324,11 +328,15 @@ waybar::modules::Battery::getInfos() {
} }
uint32_t power_now = 0; uint32_t power_now = 0;
int32_t _power_now_int = 0;
bool power_now_exists = false; bool power_now_exists = false;
if (fs::exists(bat / "power_now")) { if (fs::exists(bat / "power_now")) {
power_now_exists = true; power_now_exists = true;
std::ifstream(bat / "power_now") >> power_now; std::ifstream(bat / "power_now") >> _power_now_int;
} }
// Some drivers (example: Qualcomm) exposes use a negative value when
// discharging, positive value when charging.
power_now = std::abs(_power_now_int);
uint32_t energy_now = 0; uint32_t energy_now = 0;
bool energy_now_exists = false; bool energy_now_exists = false;