Re: [RFC PATCH 03/14] ASoC: qcom: Add USB backend ASoC driver for Q6

+int q6usb_alsa_connection_cb(struct snd_soc_usb *usb, int card_idx,

• 	int connected)
  

+{

• struct snd_soc_dapm_context *dapm;
• struct q6usb_port_data *data;
• if (!usb->component)

• return 0;
  

• dapm = snd_soc_component_get_dapm(usb->component);
• data = dev_get_drvdata(usb->component->dev);
• if (connected) {

• snd_soc_dapm_enable_pin(dapm, "USB_RX_BE");
  

• /* We only track the latest USB headset plugged in */
  

that answers to my earlier question on how to deal with multiple devices, but is this a desirable policy? This could lead to a lot of confusion. If there are restrictions to a single device, then it might be more interesting for userspace or the user to indicate which USB device gets to use USB offload and all others use legacy.

• data->active_idx = card_idx;
  

• } else {

• snd_soc_dapm_disable_pin(dapm, "USB_RX_BE");
  

• }
• snd_soc_dapm_sync(dapm);
• return 0;

+}