ALSA: usb-audio: Check Marantz/Denon USB DACs in a single place

There are three places doing the same check.  Let's make them
together.

Signed-off-by: Takashi Iwai <tiwai@suse.de>

1 files changed, 17 insertions, 23 deletions

diff --git a/sound/usb/quirks.c b/sound/usb/quirks.c
index 753a47de8459..353532b8aee4 100644
--- a/sound/usb/quirks.c
+++ b/sound/usb/quirks.c
@@ -1120,17 +1120,24 @@ bool snd_usb_get_sample_rate_quirk(struct snd_usb_audio *chip)
 /* Marantz/Denon USB DACs need a vendor cmd to switch
  * between PCM and native DSD mode
  */
+static bool is_marantz_denon_dac(unsigned int id)
+{
+        switch (id) {
+        case USB_ID(0x154e, 0x1003): /* Denon DA-300USB */
+        case USB_ID(0x154e, 0x3005): /* Marantz HD-DAC1 */
+        case USB_ID(0x154e, 0x3006): /* Marantz SA-14S1 */
+                return true;
+        }
+        return false;
+}
+
 int snd_usb_select_mode_quirk(struct snd_usb_substream *subs,
                               struct audioformat *fmt)
 {
         struct usb_device *dev = subs->dev;
         int err;
 
-        switch (subs->stream->chip->usb_id) {
-        case USB_ID(0x154e, 0x1003): /* Denon DA-300USB */
-        case USB_ID(0x154e, 0x3005): /* Marantz HD-DAC1 */
-        case USB_ID(0x154e, 0x3006): /* Marantz SA-14S1 */
-
+        if (is_marantz_denon_dac(subs->stream->chip->usb_id)) {
                 /* First switch to alt set 0, otherwise the mode switch cmd
                  * will not be accepted by the DAC
                  */
@@ -1203,17 +1210,10 @@ void snd_usb_ctl_msg_quirk(struct usb_device *dev, unsigned int pipe,
         /* Marantz/Denon devices with USB DAC functionality need a delay
          * after each class compliant request
          */
-        if ((le16_to_cpu(dev->descriptor.idVendor) == 0x154e) &&
-            (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS) {
-
-                switch (le16_to_cpu(dev->descriptor.idProduct)) {
-                case 0x1003: /* Denon DA300-USB */
-                case 0x3005: /* Marantz HD-DAC1 */
-                case 0x3006: /* Marantz SA-14S1 */
-                        mdelay(20);
-                        break;
-                }
-        }
+        if (is_marantz_denon_dac(USB_ID(le16_to_cpu(dev->descriptor.idVendor),
+                                        le16_to_cpu(dev->descriptor.idProduct)))
+            && (requesttype & USB_TYPE_MASK) == USB_TYPE_CLASS)
+                mdelay(20);
 
         /* Zoom R16/24 needs a tiny delay here, otherwise requests like
          * get/set frequency return as failed despite actually succeeding.
@@ -1268,15 +1268,9 @@ u64 snd_usb_interface_dsd_format_quirks(struct snd_usb_audio *chip,
         }
 
         /* Denon/Marantz devices with USB DAC functionality */
-        switch (chip->usb_id) {
-        case USB_ID(0x154e, 0x1003): /* Denon DA300-USB */
-        case USB_ID(0x154e, 0x3005): /* Marantz HD-DAC1 */
-        case USB_ID(0x154e, 0x3006): /* Marantz SA-14S1 */
+        if (is_marantz_denon_dac(chip->usb_id)) {
                 if (fp->altsetting == 2)
                         return SNDRV_PCM_FMTBIT_DSD_U32_BE;
-                break;
-        default:
-                break;
         }
 
         return 0;