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get current temperature from _TMP during passive cooling is active.

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it makes CPU freq transition smooth.
This commit is contained in:
Hajimu UMEMOTO 2005-08-25 11:31:30 +00:00
parent 9b96aa9ad7
commit b3130703e6
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=149450
1 changed files with 33 additions and 15 deletions
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48
sys/dev/acpica/acpi_thermal.c
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@ -414,6 +414,28 @@ acpi_tz_aclevel_string(int active)
return (aclevel_string[active + 1]);
}
/*
* Get the current temperature.
*/
static int
acpi_tz_get_temperature(struct acpi_tz_softc *sc)
{
int temp;
ACPI_STATUS status;
status = acpi_GetInteger(sc->tz_handle, "_TMP", &temp);
if (ACPI_FAILURE(status)) {
ACPI_VPRINT(sc->tz_dev, acpi_device_get_parent_softc(sc->tz_dev),
"error fetching current temperature -- %s\n",
AcpiFormatException(status));
return (FALSE);
}
ACPI_DEBUG_PRINT((ACPI_DB_VALUES, "got %d.%dC\n", TZ_KELVTOC(temp)));
sc->tz_temperature = temp;
return (TRUE);
}
/*
* Evaluate the condition of a thermal zone, take appropriate actions.
*/
@ -425,24 +447,17 @@ acpi_tz_monitor(void *Context)
int temp;
int i;
int newactive, newflags;
ACPI_STATUS status;
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
sc = (struct acpi_tz_softc *)Context;
/* Get the current temperature. */
status = acpi_GetInteger(sc->tz_handle, "_TMP", &temp);
if (ACPI_FAILURE(status)) {
ACPI_VPRINT(sc->tz_dev, acpi_device_get_parent_softc(sc->tz_dev),
"error fetching current temperature -- %s\n",
AcpiFormatException(status));
if (!acpi_tz_get_temperature(sc)) {
/* XXX disable zone? go to max cooling? */
return_VOID;
}
ACPI_DEBUG_PRINT((ACPI_DB_VALUES, "got %d.%dC\n", TZ_KELVTOC(temp)));
sc->tz_temperature = temp;
temp = sc->tz_temperature;
/*
* Work out what we ought to be doing right now.
@ -979,19 +994,22 @@ static void
acpi_tz_cooling_thread(void *arg)
{
struct acpi_tz_softc *sc;
int error, perf, temperature;
int error, perf, curr_temp, prev_temp;
ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
sc = (struct acpi_tz_softc *)arg;
temperature = sc->tz_temperature;
prev_temp = sc->tz_temperature;
while (sc->tz_cooling_enabled) {
if (sc->tz_temperature >= sc->tz_zone.psv)
if (sc->tz_cooling_active)
(void)acpi_tz_get_temperature(sc);
curr_temp = sc->tz_temperature;
if (curr_temp >= sc->tz_zone.psv)
sc->tz_cooling_active = TRUE;
if (sc->tz_cooling_active) {
perf = sc->tz_zone.tc1 * (sc->tz_temperature - temperature) +
sc->tz_zone.tc2 * (sc->tz_temperature - sc->tz_zone.psv);
perf = sc->tz_zone.tc1 * (curr_temp - prev_temp) +
sc->tz_zone.tc2 * (curr_temp - sc->tz_zone.psv);
perf /= 10;
if (perf != 0) {
@ -1008,7 +1026,7 @@ acpi_tz_cooling_thread(void *arg)
}
}
}
temperature = sc->tz_temperature;
prev_temp = curr_temp;
tsleep(&sc->tz_cooling_proc, PZERO, "cooling",
hz * sc->tz_zone.tsp / 10);
}