sravan/system76-embedded-controller
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Set CPU power limit based on input current

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This commit is contained in:
Jeremy Soller
2023-03-22 11:57:27 -06:00
parent c5229fafab
commit 7a5c111786
2 changed files with 34 additions and 16 deletions
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1
src/board/system76/common/include/board/power.h
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@ -16,7 +16,6 @@ void update_power_state(void);
void power_init(void);
void power_on(void);
void power_off(void);
void power_set_limit(void);
void power_cpu_reset(void);
void power_event(void);

41
src/board/system76/common/power.c
View File

@ -318,23 +318,24 @@ void power_off(void) {
}
#ifdef HAVE_DGPU
// Set the CPU power limit appropriately
static bool power_peci_limit(bool ac) {
if (peci_available()) {
uint16_t watts = ac ? POWER_LIMIT_AC : POWER_LIMIT_DC;
// Set PL4 using PECI
int16_t res = peci_wr_pkg_config(60, 0, ((uint32_t)watts) * 8);
DEBUG("power_peci_limit %d = %d\n", watts, res);
return res == 0x40;
}
// Set the power draw limit depending on if on AC or DC power
void power_set_limit(void) {
if (peci_available()) {
bool ac = !gpio_get(&ACIN_N);
power_peci_limit(ac);
} else {
return false;
}
}
#else // HAVE_DGPU
void power_set_limit(void) {}
static bool power_peci_limit(bool ac) {
// Use unused argument
ac = ac;
return true;
}
#endif // HAVE_DGPU
// This function is run when the CPU is reset
@ -348,7 +349,14 @@ void power_cpu_reset(void) {
//TODO: reset KBC and touchpad states
kbled_reset();
// Set PL4
power_set_limit();
//TODO: if this returns false, retry?
power_peci_limit(
// AC is connected
(!gpio_get(&ACIN_N))
&&
// There is available current
(battery_charger_input_current >= CHARGER_INPUT_CURRENT)
);
}
static bool power_button_disabled(void) {
@ -362,8 +370,14 @@ void power_event(void) {
static bool ac_last = true;
bool ac_new = gpio_get(&ACIN_N);
if (ac_new != ac_last) {
power_set_limit();
// Set CPU power limit to DC limit until we determine available current
//TODO: if this returns false, retry?
power_peci_limit(false);
// Check for USB-PD charger limit
usbpd_event();
// Configure smart charger
DEBUG("Power adapter ");
if (ac_new) {
DEBUG("unplugged\n");
@ -371,9 +385,14 @@ void power_event(void) {
} else {
DEBUG("plugged in\n");
battery_charger_configure();
// Set CPU power limit to AC limit, if there is available current
//TODO: if this returns false, retry?
if (battery_charger_input_current >= CHARGER_INPUT_CURRENT) {
power_peci_limit(true);
}
}
battery_debug();
usbpd_event();
// Reset main loop cycle to force reading PECI and battery
main_cycle = 0;