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09 May 2024 12:56:17 -0700 Message-ID: <76a943f7-d839-4378-aa12-7fb32e3077e6@linux.intel.com> Date: Thu, 9 May 2024 08:02:49 -0500 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v21 26/39] ASoC: qcom: qdsp6: Add support to track available USB PCM devices To: Wesley Cheng , srinivas.kandagatla@linaro.org, mathias.nyman@intel.com, perex@perex.cz, conor+dt@kernel.org, corbet@lwn.net, lgirdwood@gmail.com, andersson@kernel.org, krzk+dt@kernel.org, gregkh@linuxfoundation.org, Thinh.Nguyen@synopsys.com, broonie@kernel.org, bgoswami@quicinc.com, tiwai@suse.com, bagasdotme@gmail.com, robh@kernel.org, konrad.dybcio@linaro.org Cc: linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-sound@vger.kernel.org, linux-usb@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-doc@vger.kernel.org, alsa-devel@alsa-project.org References: <20240507195116.9464-1-quic_wcheng@quicinc.com> <20240507195116.9464-27-quic_wcheng@quicinc.com> <875b643f-af2c-4a1b-87e8-80cd6f236dea@linux.intel.com> Content-Language: en-US From: Pierre-Louis Bossart In-Reply-To: Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit On 5/8/24 18:57, Wesley Cheng wrote: > 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). Right, so the wording 'only track the latest USB headset plugged in' is incorrect or obsolete, isn't it?