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Evaluate _TTS on sleep state transitions. This is mainly to pro-actively 

support some weird BIOS, which may require the evaluation. Ok jmcneill@.
This commit is contained in:
jruoho 2010-04-25 10:05:22 +00:00
parent 8e71c066b9
commit 61a52d7657
1 changed files with 21 additions and 2 deletions
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23
sys/dev/acpi/acpi.c
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@ -1,4 +1,4 @@
/* $NetBSD: acpi.c,v 1.188 2010/04/25 09:12:38 jruoho Exp $ */
/* $NetBSD: acpi.c,v 1.189 2010/04/25 10:05:22 jruoho Exp $ */
/*-
* Copyright (c) 2003, 2007 The NetBSD Foundation, Inc.
@ -65,7 +65,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: acpi.c,v 1.188 2010/04/25 09:12:38 jruoho Exp $");
__KERNEL_RCSID(0, "$NetBSD: acpi.c,v 1.189 2010/04/25 10:05:22 jruoho Exp $");
#include "opt_acpi.h"
#include "opt_pcifixup.h"
@ -1462,6 +1462,19 @@ acpi_enter_sleep_state(struct acpi_softc *sc, int state)
break;
}
/*
* Evaluate the _TTS method, which should be called
* before _PTS. We should also re-evaluate this once
* we return to S0 (see ACPI 3.0, section 7.3.6).
* In reality, _TTS is seldom seen in the field.
*/
rv = acpi_eval_set_integer(NULL, "\\_TTS", state);
if (ACPI_SUCCESS(rv))
aprint_debug_dev(sc->sc_dev, "evaluated _TTS\n");
rv = AE_OK;
/*
* This will evaluate the _PTS and _SST methods,
* but unlike the documentation claims, not _GTS,
@ -1504,8 +1517,11 @@ acpi_enter_sleep_state(struct acpi_softc *sc, int state)
}
break;
case ACPI_STATE_S5:
(void)acpi_eval_set_integer(NULL, "\\_TTS", state);
rv = AcpiEnterSleepStatePrep(ACPI_STATE_S5);
if (ACPI_FAILURE(rv)) {
@ -1522,11 +1538,14 @@ acpi_enter_sleep_state(struct acpi_softc *sc, int state)
(void)AcpiEnterSleepState(ACPI_STATE_S5);
aprint_error_dev(sc->sc_dev, "WARNING: powerdown failed!\n");
break;
}
sc->sc_sleepstate = ACPI_STATE_S0;
(void)acpi_eval_set_integer(NULL, "\\_TTS", ACPI_STATE_S0);
return rv;
}