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/* Copyright 2021 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 "tablet_mode.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 1~2 rpm */
uint16_t rpm[FAN_CH_COUNT];
};
static const struct fan_step *fan_step_table;
static const struct fan_step fan_table_clamshell[] = {
{
/* level 0 */
.on = {44, 46, 0, -1},
.off = {99, 99, 99, -1},
.rpm = {0, 0},
},
{
/* level 1 */
.on = {45, 47, 0, -1},
.off = {44, 46, 99, -1},
.rpm = {3400, 3900},
},
{
/* level 2 */
.on = {46, 48, 0, -1},
.off = {45, 47, 99, -1},
.rpm = {3700, 4200},
},
{
/* level 3 */
.on = {47, 49, 0, -1},
.off = {46, 48, 99, -1},
.rpm = {4100, 4500},
},
{
/* level 4 */
.on = {48, 50, 50, -1},
.off = {47, 49, 48, -1},
.rpm = {4200, 4600},
},
{
/* level 5 */
.on = {49, 51, 52, -1},
.off = {48, 50, 50, -1},
.rpm = {4600, 4900},
},
{
/* level 6 */
.on = {100, 100, 100, -1},
.off = {49, 51, 52, -1},
.rpm = {4900, 5200},
},
};
static const struct fan_step fan_table_tablet[] = {
{
/* level 0 */
.on = {44, 46, 0, -1},
.off = {99, 99, 99, -1},
.rpm = {0, 0},
},
{
/* level 1 */
.on = {45, 47, 0, -1},
.off = {44, 46, 99, -1},
.rpm = {3400, 3900},
},
{
/* level 2 */
.on = {46, 48, 0, -1},
.off = {45, 47, 99, -1},
.rpm = {3700, 4200},
},
{
/* level 3 */
.on = {47, 49, 0, -1},
.off = {46, 48, 99, -1},
.rpm = {4100, 4500},
},
{
/* level 4 */
.on = {48, 50, 50, -1},
.off = {47, 49, 48, -1},
.rpm = {4200, 4600},
},
{
/* level 5 */
.on = {49, 51, 52, -1},
.off = {48, 50, 50, -1},
.rpm = {4600, 4900},
},
{
/* level 6 */
.on = {100, 100, 100, -1},
.off = {49, 51, 52, -1},
.rpm = {4900, 5200},
},
};
#define NUM_FAN_LEVELS ARRAY_SIZE(fan_table_clamshell)
BUILD_ASSERT(ARRAY_SIZE(fan_table_clamshell) ==
ARRAY_SIZE(fan_table_tablet));
int fan_table_to_rpm(int fan, int *temp)
{
static int current_level;
static int prev_tmp[TEMP_SENSOR_COUNT];
int new_rpm = 0;
int i;
if (tablet_get_mode())
fan_step_table = fan_table_tablet;
else
fan_step_table = fan_table_clamshell;
/*
* 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)
*/
if (temp[TEMP_SENSOR_1_DDR] < prev_tmp[TEMP_SENSOR_1_DDR] ||
temp[TEMP_SENSOR_2_SOC] < prev_tmp[TEMP_SENSOR_2_SOC] ||
temp[TEMP_SENSOR_3_CHARGER] < prev_tmp[TEMP_SENSOR_3_CHARGER]) {
for (i = current_level; i > 0; i--) {
if (temp[TEMP_SENSOR_1_DDR] <
fan_step_table[i].off[TEMP_SENSOR_1_DDR] &&
temp[TEMP_SENSOR_3_CHARGER] <
fan_step_table[i].off[TEMP_SENSOR_3_CHARGER] &&
temp[TEMP_SENSOR_2_SOC] <
fan_step_table[i].off[TEMP_SENSOR_2_SOC])
current_level = i - 1;
else
break;
}
} else if (temp[TEMP_SENSOR_1_DDR] > prev_tmp[TEMP_SENSOR_1_DDR] ||
temp[TEMP_SENSOR_2_SOC] > prev_tmp[TEMP_SENSOR_2_SOC] ||
temp[TEMP_SENSOR_3_CHARGER] >
prev_tmp[TEMP_SENSOR_3_CHARGER]) {
for (i = current_level; i < NUM_FAN_LEVELS; i++) {
if ((temp[TEMP_SENSOR_1_DDR] >
fan_step_table[i].on[TEMP_SENSOR_1_DDR] &&
temp[TEMP_SENSOR_3_CHARGER] >
fan_step_table[i].on[TEMP_SENSOR_3_CHARGER]) ||
temp[TEMP_SENSOR_2_SOC] >
fan_step_table[i].on[TEMP_SENSOR_2_SOC])
current_level = i + 1;
else
break;
}
}
if (current_level < 0)
current_level = 0;
for (i = 0; i < TEMP_SENSOR_COUNT; ++i)
prev_tmp[i] = temp[i];
ASSERT(current_level < NUM_FAN_LEVELS);
switch (fan) {
case FAN_CH_0:
new_rpm = fan_step_table[current_level].rpm[FAN_CH_0];
break;
case FAN_CH_1:
new_rpm = fan_step_table[current_level].rpm[FAN_CH_1];
break;
default:
break;
}
return new_rpm;
}
void board_override_fan_control(int fan, int *tmp)
{
if (chipset_in_state(CHIPSET_STATE_ON |
CHIPSET_STATE_ANY_SUSPEND)) {
fan_set_rpm_mode(FAN_CH(fan), 1);
fan_set_rpm_target(FAN_CH(fan),
fan_table_to_rpm(fan, tmp));
}
}
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