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-rw-r--r--src/acpi/acpigen_dptf.c28
-rw-r--r--src/drivers/intel/dptf/chip.h27
-rw-r--r--src/drivers/intel/dptf/dptf.c19
-rw-r--r--src/include/acpi/acpigen_dptf.h15
4 files changed, 89 insertions, 0 deletions
diff --git a/src/acpi/acpigen_dptf.c b/src/acpi/acpigen_dptf.c
index 9be3f5be8f..59afa551a5 100644
--- a/src/acpi/acpigen_dptf.c
+++ b/src/acpi/acpigen_dptf.c
@@ -404,3 +404,31 @@ void dptf_write_power_limits(const struct dptf_power_limits *limits)
acpigen_pop_len(); /* Method */
acpigen_pop_len(); /* Scope */
}
+
+void dptf_write_STR(const char *str)
+{
+ if (!str)
+ return;
+
+ acpigen_write_name_string("_STR", str);
+}
+
+void dptf_write_fan_options(bool fine_grained, int step_size, bool low_speed_notify)
+{
+ acpigen_write_name("_FIF");
+ acpigen_write_package(4);
+
+ acpigen_write_integer(0); /* Revision */
+ acpigen_write_integer(fine_grained);
+ acpigen_write_integer(step_size);
+ acpigen_write_integer(low_speed_notify);
+ acpigen_pop_len(); /* Package */
+}
+
+void dptf_write_tsr_hysteresis(uint8_t hysteresis)
+{
+ if (!hysteresis)
+ return;
+
+ acpigen_write_name_integer("GTSH", hysteresis);
+}
diff --git a/src/drivers/intel/dptf/chip.h b/src/drivers/intel/dptf/chip.h
index 0d2c25cf61..28403a83bd 100644
--- a/src/drivers/intel/dptf/chip.h
+++ b/src/drivers/intel/dptf/chip.h
@@ -17,6 +17,33 @@ struct drivers_intel_dptf_config {
struct dptf_fan_perf fan_perf[DPTF_MAX_FAN_PERF_STATES];
struct dptf_power_limits power_limits;
} controls;
+
+ /* Note that all values in this struct are optional */
+ struct {
+ struct {
+ /* True means _FSL is percentages, False means _FSL is Control values */
+ bool fine_grained_control;
+ /*
+ * Recommended minimum step size in percentage points to adjust fan
+ * speed when utilizing fine-grained control (1-9)
+ */
+ uint8_t step_size;
+ /*
+ * True means the platform will issue a Notify (0x80) to the fan device
+ * if a a low fan speed is detected
+ */
+ bool low_speed_notify;
+ } fan;
+ struct {
+ /*
+ * The amount of hysteresis implemented in circuitry or in the platform
+ * EC's firmware implementation (using the GTSH object)
+ */
+ uint8_t hysteresis;
+ /* Name applied to TSR (using the _STR object) */
+ const char *desc;
+ } tsr[DPTF_MAX_TSR];
+ } options;
};
#endif /* _DRIVERS_INTEL_DPTF_CHIP_H_ */
diff --git a/src/drivers/intel/dptf/dptf.c b/src/drivers/intel/dptf/dptf.c
index 15a7d1297b..1fe9653eb7 100644
--- a/src/drivers/intel/dptf/dptf.c
+++ b/src/drivers/intel/dptf/dptf.c
@@ -62,6 +62,12 @@ static const char *dptf_acpi_name(const struct device *dev)
static void dptf_fill_ssdt(const struct device *dev)
{
struct drivers_intel_dptf_config *config = config_of(dev);
+ enum dptf_participant p;
+ bool tsr_en[DPTF_MAX_TSR] = {false};
+ int i;
+
+ for (p = DPTF_TEMP_SENSOR_0, i = 0; p <= DPTF_TEMP_SENSOR_3; ++p, ++i)
+ tsr_en[i] = is_participant_used(config, p);
dptf_write_active_policies(config->policies.active,
DPTF_MAX_ACTIVE_POLICIES);
@@ -77,6 +83,19 @@ static void dptf_fill_ssdt(const struct device *dev)
dptf_write_fan_perf(config->controls.fan_perf, DPTF_MAX_FAN_PERF_STATES);
dptf_write_power_limits(&config->controls.power_limits);
+ /* Fan options */
+ dptf_write_fan_options(config->options.fan.fine_grained_control,
+ config->options.fan.step_size,
+ config->options.fan.low_speed_notify);
+
+ /* TSR options */
+ for (p = DPTF_TEMP_SENSOR_0, i = 0; p <= DPTF_TEMP_SENSOR_3; ++p, ++i) {
+ if (tsr_en[i]) {
+ dptf_write_tsr_hysteresis(config->options.tsr[i].hysteresis);
+ dptf_write_STR(config->options.tsr[i].desc);
+ }
+ }
+
printk(BIOS_INFO, "\\_SB.DPTF: %s at %s\n", dev->chip_ops->name, dev_path(dev));
}
diff --git a/src/include/acpi/acpigen_dptf.h b/src/include/acpi/acpigen_dptf.h
index 474f72cd71..496840b8b4 100644
--- a/src/include/acpi/acpigen_dptf.h
+++ b/src/include/acpi/acpigen_dptf.h
@@ -36,6 +36,9 @@ enum {
/* From ACPI spec 6.3 */
DPTF_FIELD_UNUSED = 0xFFFFFFFFull,
+
+ /* Max supported by DPTF */
+ DPTF_MAX_TSR = 4,
};
/* Active Policy */
@@ -169,6 +172,18 @@ void dptf_write_fan_perf(const struct dptf_fan_perf *perf, int max_count);
*/
void dptf_write_power_limits(const struct dptf_power_limits *limits);
+/* Set the _STR Name */
+void dptf_write_STR(const char *str);
+
+/* Set options in the _FIF table */
+void dptf_write_fan_options(bool fine_grained, int step_size, bool low_speed_notify);
+
+/*
+ * Sets the amount of inherent hysteresis in temperature sensor readings (either from hardware
+ * circuitry or possibly from the EC's firmware implementation.
+ */
+void dptf_write_tsr_hysteresis(uint8_t hysteresis);
+
/* Helper method to open the scope for a given participant. */
void dptf_write_scope(enum dptf_participant participant);