[ALSA] Add MPU401_INFO_NO_ACK bitflag

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>

3 files changed, 3 insertions, 1 deletions

diff --git a/include/sound/mpu401.h b/include/sound/mpu401.h
index 68b634b75068..1f1d53f8830b 100644
--- a/include/sound/mpu401.h
+++ b/include/sound/mpu401.h
@@ -50,6 +50,7 @@
 #define MPU401_INFO_INTEGRATED  (1 << 2)        /* integrated h/w port */
 #define MPU401_INFO_MMIO        (1 << 3)        /* MMIO access */
 #define MPU401_INFO_TX_IRQ      (1 << 4)        /* independent TX irq */
+#define MPU401_INFO_NO_ACK      (1 << 6)        /* No ACK cmd needed */
 
 #define MPU401_MODE_BIT_INPUT           0
 #define MPU401_MODE_BIT_OUTPUT          1
diff --git a/sound/drivers/mpu401/mpu401_uart.c b/sound/drivers/mpu401/mpu401_uart.c
index 18cca2457d44..2af09996a3d0 100644
--- a/sound/drivers/mpu401/mpu401_uart.c
+++ b/sound/drivers/mpu401/mpu401_uart.c
@@ -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) {
diff --git a/sound/pci/ice1712/ice1724.c b/sound/pci/ice1712/ice1724.c
index 4490422fb930..681fbbd8a5ce 100644
--- a/sound/pci/ice1712/ice1724.c
+++ b/sound/pci/ice1712/ice1724.c
@@ -2429,6 +2429,7 @@ static int __devinit snd_vt1724_probe(struct pci_dev *pci,
                         if ((err = snd_mpu401_uart_new(card, 0, MPU401_HW_ICE1712,
                                                        ICEREG1724(ice, MPU_CTRL),
                                                        (MPU401_INFO_INTEGRATED |
+                                                        MPU401_INFO_NO_ACK |
                                                         MPU401_INFO_TX_IRQ),
                                                        ice->irq, 0,
                                                        &ice->rmidi[0])) < 0) {