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[ALSA] Add MPU401_INFO_NO_ACK bitflag

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Added MPU401_INFO_NO_ACK bitflag to ignore the ACK check for UART
commands.  VT172x doesn't handle ACK commands, for example.

Tested-by: Pavel Hofman <pavel.hofman@insite.cz>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai
2008-04-25 09:13:45 +02:00
parent a01e035ebb
commit df7e3fdf83
3 changed files with 3 additions and 1 deletions
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2
sound/drivers/mpu401/mpu401_uart.c
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@@ -243,7 +243,7 @@ static int snd_mpu401_uart_cmd(struct snd_mpu401 * mpu, unsigned char cmd,
#endif
}
mpu->write(mpu, cmd, MPU401C(mpu));
if (ack) {
if (ack && !(mpu->info_flags & MPU401_INFO_NO_ACK)) {
ok = 0;
timeout = 10000;
while (!ok && timeout-- > 0) {