Hi Wesley,

[FYI, it's a private test report for your RFC patch.]
[auto build test WARNING on broonie-sound/for-next]
[also build test WARNING on tiwai-sound/for-next tiwai-sound/for-linus usb/usb-testing usb/usb-next usb/usb-linus linus/master v6.1 next-20221220]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Wesley-Cheng/ASoC-Add-SOC-USB-APIs-for-adding-an-USB-backend/20221224-073625
base:   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git for-next
patch link:    https://lore.kernel.org/r/20221223233200.26089-4-quic_wcheng%40quicinc.com
patch subject: [RFC PATCH 03/14] ASoC: qcom: Add USB backend ASoC driver for Q6
config: arm-allyesconfig
compiler: arm-linux-gnueabi-gcc (GCC) 12.1.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://github.com/intel-lab-lkp/linux/commit/7a76fe9a5a584f1515b084c5ef29bfa0d2a7a4a9
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Wesley-Cheng/ASoC-Add-SOC-USB-APIs-for-adding-an-USB-backend/20221224-073625
        git checkout 7a76fe9a5a584f1515b084c5ef29bfa0d2a7a4a9
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arm olddefconfig
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-12.1.0 make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash sound/soc/qcom/qdsp6/

If you fix the issue, kindly add following tag where applicable
| Reported-by: kernel test robot <lkp@intel.com>

All warnings (new ones prefixed by >>):

>> sound/soc/qcom/qdsp6/q6usb.c:75:5: warning: no previous prototype for 'q6usb_audio_ports_of_xlate_dai_name' [-Wmissing-prototypes]
      75 | int q6usb_audio_ports_of_xlate_dai_name(struct snd_soc_component *component,
         |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> sound/soc/qcom/qdsp6/q6usb.c:117:5: warning: no previous prototype for 'q6usb_alsa_connection_cb' [-Wmissing-prototypes]
     117 | int q6usb_alsa_connection_cb(struct snd_soc_usb *usb, int card_idx,
         |     ^~~~~~~~~~~~~~~~~~~~~~~~


vim +/q6usb_audio_ports_of_xlate_dai_name +75 sound/soc/qcom/qdsp6/q6usb.c

    74	
  > 75	int q6usb_audio_ports_of_xlate_dai_name(struct snd_soc_component *component,
    76						const struct of_phandle_args *args,
    77						const char **dai_name)
    78	{
    79		int id = args->args[0];
    80		int ret = -EINVAL;
    81		int i;
    82	
    83		for (i = 0; i  < ARRAY_SIZE(q6usb_be_dais); i++) {
    84			if (q6usb_be_dais[i].id == id) {
    85				*dai_name = q6usb_be_dais[i].name;
    86				ret = 0;
    87				break;
    88			}
    89		}
    90	
    91		return ret;
    92	}
    93	
    94	static int q6usb_component_probe(struct snd_soc_component *component)
    95	{
    96		struct q6usb_port_data *data = dev_get_drvdata(component->dev);
    97		struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
    98	
    99		data->usb->component = component;
   100	
   101		snd_soc_dapm_disable_pin(dapm, "USB_RX_BE");
   102		snd_soc_dapm_sync(dapm);
   103	
   104		return 0;
   105	}
   106	
   107	static const struct snd_soc_component_driver q6usb_dai_component = {
   108		.probe		= q6usb_component_probe,
   109		.name		= "q6usb-dai-component",
   110		.dapm_widgets = q6usb_dai_widgets,
   111		.num_dapm_widgets = ARRAY_SIZE(q6usb_dai_widgets),
   112		.dapm_routes = q6usb_dapm_routes,
   113		.num_dapm_routes = ARRAY_SIZE(q6usb_dapm_routes),
   114		.of_xlate_dai_name = q6usb_audio_ports_of_xlate_dai_name,
   115	};
   116	
 > 117	int q6usb_alsa_connection_cb(struct snd_soc_usb *usb, int card_idx,
   118				int connected)
   119	{
   120		struct snd_soc_dapm_context *dapm;
   121		struct q6usb_port_data *data;
   122	
   123		if (!usb->component)
   124			return 0;
   125	
   126		dapm = snd_soc_component_get_dapm(usb->component);
   127		data = dev_get_drvdata(usb->component->dev);
   128	
   129		if (connected) {
   130			snd_soc_dapm_enable_pin(dapm, "USB_RX_BE");
   131			/* We only track the latest USB headset plugged in */
   132			data->active_idx = card_idx;
   133		} else {
   134			snd_soc_dapm_disable_pin(dapm, "USB_RX_BE");
   135		}
   136		snd_soc_dapm_sync(dapm);
   137	
   138		return 0;
   139	}
   140	

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