插着USB mic开机时，系统没有声音问题

diff --git a/sound/usb/card.c b/sound/usb/card.c
old mode 100644
new mode 100755
index 83336bb..f3323ed
--- a/sound/usb/card.c
+++ b/sound/usb/card.c
@@ -83,6 +83,11 @@ static int device_setup[SNDRV_CARDS]; /* device parameter for this card */
 static bool ignore_ctl_error;
 static bool autoclock = true;
 
+#define CONFIG_SND_RK_SOC
+#ifdef CONFIG_SND_RK_SOC
+#define USB_AUDIO_CARD_NUM     3
+#endif
+
 module_param_array(index, int, NULL, 0444);
 MODULE_PARM_DESC(index, "Index value for the USB audio adapter.");
 module_param_array(id, charp, NULL, 0444);
@@ -369,9 +374,14 @@ static int snd_usb_audio_create(struct usb_interface *intf,
                dev_err(&dev->dev, "unknown device speed %d\n", snd_usb_get_speed(dev));
                return -ENXIO;
        }
-
-       err = snd_card_new(&intf->dev, index[idx], id[idx], THIS_MODULE,
+       
+       #ifdef CONFIG_SND_RK_SOC
+       err = snd_card_new(&intf->dev, USB_AUDIO_CARD_NUM, id[idx], THIS_MODULE,
+                          0, &card);
+       #else
+               err = snd_card_new(&intf->dev, index[idx], id[idx], THIS_MODULE,
                           0, &card);
+       #endif     
        if (err < 0) {
                dev_err(&dev->dev, "cannot create card instance %d\n", idx);
                return err;