diff options
-rw-r--r-- | board/eldrid/board.h | 1 | ||||
-rw-r--r-- | board/eldrid/build.mk | 1 | ||||
-rw-r--r-- | board/eldrid/thermal.c | 161 |
3 files changed, 163 insertions, 0 deletions
diff --git a/board/eldrid/board.h b/board/eldrid/board.h index 8e59d5e0c6..0e8d754182 100644 --- a/board/eldrid/board.h +++ b/board/eldrid/board.h @@ -114,6 +114,7 @@ /* Volume Button feature */ /* Fan features */ +#define CONFIG_CUSTOM_FAN_CONTROL /* charger defines */ #define CONFIG_CHARGER_SENSE_RESISTOR 10 diff --git a/board/eldrid/build.mk b/board/eldrid/build.mk index b78172d3cf..8a5f8f68cd 100644 --- a/board/eldrid/build.mk +++ b/board/eldrid/build.mk @@ -15,3 +15,4 @@ board-y=board.o board-y+=battery.o board-y+=led.o board-y+=sensors.o +board-y+=thermal.o diff --git a/board/eldrid/thermal.c b/board/eldrid/thermal.c new file mode 100644 index 0000000000..ce36ce3860 --- /dev/null +++ b/board/eldrid/thermal.c @@ -0,0 +1,161 @@ +/* Copyright 2020 The Chromium OS Authors. All rights reserved. + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "chipset.h" +#include "common.h" +#include "console.h" +#include "fan.h" +#include "hooks.h" +#include "host_command.h" +#include "temp_sensor.h" +#include "thermal.h" +#include "util.h" + +/* Console output macros */ +#define CPUTS(outstr) cputs(CC_THERMAL, outstr) +#define CPRINTS(format, args...) cprints(CC_THERMAL, format, ## args) + +struct fan_step { + /* + * Sensor 1~4 trigger point, set -1 if we're not using this + * sensor to determine fan speed. + */ + int8_t on[TEMP_SENSOR_COUNT]; + + /* + * Sensor 1~4 trigger point, set -1 if we're not using this + * sensor to determine fan speed. + */ + int8_t off[TEMP_SENSOR_COUNT]; + + /* Fan rpm */ + uint16_t rpm[FAN_CH_COUNT]; +}; + +/* + * TODO(b/167931578) Only monitor sensor3 for now. + * Will add more sensors support if needed. + */ +static const struct fan_step fan_table[] = { + { + /* level 0 */ + .on = {-1, -1, 36, -1}, + .off = {-1, -1, 0, -1}, + .rpm = {0}, + }, + { + /* level 1 */ + .on = {-1, -1, 38, -1}, + .off = {-1, -1, 36, -1}, + .rpm = {2000}, + }, + { + /* level 2 */ + .on = {-1, -1, 41, -1}, + .off = {-1, -1, 39, -1}, + .rpm = {2600}, + }, + { + /* level 3 */ + .on = {-1, -1, 44, -1}, + .off = {-1, -1, 42, -1}, + .rpm = {3000}, + }, + { + /* level 4 */ + .on = {-1, -1, 46, -1}, + .off = {-1, -1, 44, -1}, + .rpm = {3300}, + }, + { + /* level 5 */ + .on = {-1, -1, 49, -1}, + .off = {-1, -1, 47, -1}, + .rpm = {3600}, + }, + { + /* level 6 */ + .on = {-1, -1, 51, -1}, + .off = {-1, -1, 49, -1}, + .rpm = {4200}, + }, + { + /* level 7 */ + .on = {-1, -1, 55, -1}, + .off = {-1, -1, 52, -1}, + .rpm = {4700}, + }, +}; + +int fan_table_to_rpm(int fan, int *temp) +{ + /* current fan level */ + static int current_level; + /* previous sensor temperature */ + static int prev_temp[TEMP_SENSOR_COUNT]; + const int num_fan_levels = ARRAY_SIZE(fan_table); + int i; + int new_rpm = 0; + + /* + * Compare the current and previous temperature, we have + * the three paths : + * 1. decreasing path. (check the release point) + * 2. increasing path. (check the trigger point) + * 3. invariant path. (return the current RPM) + */ + + CPRINTS("temp: %d, prev_temp: %d", temp[TEMP_SENSOR_3_DDR_SOC], + prev_temp[TEMP_SENSOR_3_DDR_SOC]); + if (temp[TEMP_SENSOR_3_DDR_SOC] < prev_temp[TEMP_SENSOR_3_DDR_SOC]) { + for (i = current_level; i > 0; i--) { + if (temp[TEMP_SENSOR_3_DDR_SOC] < + fan_table[i].off[TEMP_SENSOR_3_DDR_SOC]) + current_level = i - 1; + else + break; + } + } else if (temp[TEMP_SENSOR_3_DDR_SOC] > + prev_temp[TEMP_SENSOR_3_DDR_SOC]) { + for (i = current_level; i < num_fan_levels; i++) { + if (temp[TEMP_SENSOR_3_DDR_SOC] > + fan_table[i].on[TEMP_SENSOR_3_DDR_SOC]) + current_level = i + 1; + else + break; + } + } + + if (current_level < 0) + current_level = 0; + + for (i = 0; i < TEMP_SENSOR_COUNT; ++i) + prev_temp[i] = temp[i]; + + CPRINTS("current_level: %d", current_level); + + switch (fan) { + case FAN_CH_0: + new_rpm = fan_table[current_level].rpm[FAN_CH_0]; + break; + default: + break; + } + + return new_rpm; +} + +void board_override_fan_control(int fan, int *temp) +{ + if (chipset_in_state(CHIPSET_STATE_ON)) { + fan_set_rpm_mode(FAN_CH(fan), 1); + fan_set_rpm_target(FAN_CH(fan), + fan_table_to_rpm(fan, temp)); + } else if (chipset_in_state(CHIPSET_STATE_ANY_SUSPEND)) { + /* Stop fan when enter S0ix */ + fan_set_rpm_mode(FAN_CH(fan), 1); + fan_set_rpm_target(FAN_CH(fan), 0); + } +} |