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Mute the main audio during reboot/shutdown. This prevents a burst of static

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on the speakers of my Panasonic Y4.  It might make sense to do this in the
mixer rc.d script as well.
This commit is contained in:
njl 2007-06-02 19:37:27 +00:00
parent 8c017c22f4
commit 9d0fbd0af1
1 changed files with 16 additions and 2 deletions
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18
sys/dev/acpi_support/acpi_panasonic.c
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@ -79,6 +79,7 @@ typedef int hkey_fn_t(ACPI_HANDLE, int, UINT32 *);
static int acpi_panasonic_probe(device_t dev);
static int acpi_panasonic_attach(device_t dev);
static int acpi_panasonic_detach(device_t dev);
static void acpi_panasonic_shutdown(device_t dev);
static int acpi_panasonic_sysctl(SYSCTL_HANDLER_ARGS);
static ACPI_INTEGER acpi_panasonic_sinf(ACPI_HANDLE h, ACPI_INTEGER index);
static void acpi_panasonic_sset(ACPI_HANDLE h, ACPI_INTEGER index,
@ -114,6 +115,7 @@ static device_method_t acpi_panasonic_methods[] = {
DEVMETHOD(device_probe, acpi_panasonic_probe),
DEVMETHOD(device_attach, acpi_panasonic_attach),
DEVMETHOD(device_detach, acpi_panasonic_detach),
DEVMETHOD(device_shutdown, acpi_panasonic_shutdown),
{0, 0}
};
@ -181,7 +183,7 @@ acpi_panasonic_attach(device_t dev)
}
#endif
/* Handle notifies */
/* Handle notifies */
status = AcpiInstallNotifyHandler(sc->handle, ACPI_DEVICE_NOTIFY,
acpi_panasonic_notify, sc);
if (ACPI_FAILURE(status)) {
@ -218,6 +220,18 @@ acpi_panasonic_detach(device_t dev)
return (0);
}
static void
acpi_panasonic_shutdown(device_t dev)
{
struct acpi_panasonic_softc *sc;
int mute;
/* Mute the main audio during reboot to prevent static burst to speaker. */
sc = device_get_softc(dev);
mute = 1;
hkey_sound_mute(sc->handle, HKEY_SET, &mute);
}
static int
acpi_panasonic_sysctl(SYSCTL_HANDLER_ARGS)
{
@ -230,7 +244,7 @@ acpi_panasonic_sysctl(SYSCTL_HANDLER_ARGS)
function = oidp->oid_arg2;
handler = sysctl_table[function].handler;
/* Get the current value from the appropriate function. */
/* Get the current value from the appropriate function. */
ACPI_SERIAL_BEGIN(panasonic);
error = handler(sc->handle, HKEY_GET, &arg);
if (error != 0)