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Date: Wed, 8 May 2024 16:57:59 -0700
From: Wesley Cheng <quic_wcheng@...cinc.com>
To: Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        <srinivas.kandagatla@...aro.org>, <mathias.nyman@...el.com>,
        <perex@...ex.cz>, <conor+dt@...nel.org>, <corbet@....net>,
        <lgirdwood@...il.com>, <andersson@...nel.org>, <krzk+dt@...nel.org>,
        <gregkh@...uxfoundation.org>, <Thinh.Nguyen@...opsys.com>,
        <broonie@...nel.org>, <bgoswami@...cinc.com>, <tiwai@...e.com>,
        <bagasdotme@...il.com>, <robh@...nel.org>, <konrad.dybcio@...aro.org>
CC: <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-sound@...r.kernel.org>, <linux-usb@...r.kernel.org>,
        <linux-arm-msm@...r.kernel.org>, <linux-doc@...r.kernel.org>,
        <alsa-devel@...a-project.org>
Subject: Re: [PATCH v21 26/39] ASoC: qcom: qdsp6: Add support to track
 available USB PCM devices

Hi Pierre,

On 5/7/2024 2:23 PM, Pierre-Louis Bossart wrote:
> 
>> @@ -113,6 +120,12 @@ static int q6usb_alsa_connection_cb(struct snd_soc_usb *usb,
>>   	if (connected) {
>>   		/* We only track the latest USB headset plugged in */
>>   		data->active_usb_chip_idx = sdev->card_idx;
>> +
>> +		set_bit(sdev->card_idx, &data->available_card_slot);
>> +		data->status[sdev->card_idx].sdev = sdev;
> 
> Not following the 'only track the latest USB headset plugged in', I
> don't see anything that discard the previously latest headset...
> 
> If you plug headset1, then headset2, how is headset1 marked as not
> available for USB offload?
> 

It won't mark headset1 as not available for offload, because offload 
could happen on either depending on what is selected (from the kcontrol 
as well).

Thanks
Wesley Cheng

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