From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 3B61F126F0F; Wed, 8 May 2024 13:16:23 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.7 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715174184; cv=none; b=CIazFFRowxd14nl6Ft0j5iEC8oL3KV8Vgg3PlCi4VRAnkkqgFuvR8LGchjULw/6NgyDvXJGdU6J7kJPCWVzXpuTFhtvpUMg5c7Orh1pQ7+80A6t8THk+jYxqAopvHV16oVD0ygny2Cwdp/gRaHRSZy/oG/lCOwdP9g6CDAydw10= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1715174184; c=relaxed/simple; bh=gQ4XL8BmkP07oBddLqlnRnQ5uY4XUZH2ALIHdrPqhas=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=YYyqH1LlTmWzVwf4YOVUnWfgwS1YgcyTZ2dLAU3XhAZAdi+pWp2nsiCF+vmg8JCUTmOB0oIz++yKzyamWEubaVp8c8Lp3qMi6zsgi6GxmKXuM+6mmcfVE7S21QUpLTZQ4vD3Kaj0s1LO3Qz5x3nW6DD+JqLncxYRbXUv09+lcs8= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com; spf=none smtp.mailfrom=linux.intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=c6EWZsHz; arc=none smtp.client-ip=192.198.163.7 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; spf=none smtp.mailfrom=linux.intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="c6EWZsHz" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1715174183; x=1746710183; h=message-id:date:mime-version:subject:to:cc:references: from:in-reply-to:content-transfer-encoding; bh=gQ4XL8BmkP07oBddLqlnRnQ5uY4XUZH2ALIHdrPqhas=; b=c6EWZsHzxTo/nXWz8IbxqRv9dOQYOP7AKMKezGzpLzAp5DTg0surec7I pzdU9SMcx9/JDdgsadTgwOj4rgsrzpL0PkWZ65/ABuzw9KxBbtzOFpr9I 6hfqqV0b0Z9Diu7k/UpsN+CcHr5LPOpu2nd6Tvb/LPBzkHYR4Aow6on1F xPHKjIIcJcZzvg5j6Pcgg22GxBg/j4FXHtjPo3QfDnSKKmYHQ3WBlf7TD JCatdeIx+BOadZbHcP0B9DbCjXWLy+T/I0kr+52Lx7OWh0s13OAURtOSV OI7d7KhfcpixMwfvE68n/i80mZKqX8SAhOy8gJ2sn2332JTI3442iXFf3 A==; X-CSE-ConnectionGUID: eB36tTZ0RiGdgaXl4S/0eQ== X-CSE-MsgGUID: 8bDscozjTImHvQQcnHSsIw== X-IronPort-AV: E=McAfee;i="6600,9927,11066"; a="36413306" X-IronPort-AV: E=Sophos;i="6.08,145,1712646000"; d="scan'208";a="36413306" Received: from fmviesa005.fm.intel.com ([10.60.135.145]) by fmvoesa101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 May 2024 06:16:23 -0700 X-CSE-ConnectionGUID: DZNJ1++zQUamCAy0Wc3MPw== X-CSE-MsgGUID: p99V4mIHQi6lXjfwtugazw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.08,145,1712646000"; d="scan'208";a="33356839" Received: from sskolar-mobl.amr.corp.intel.com (HELO [10.212.67.115]) ([10.212.67.115]) by fmviesa005-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 May 2024 06:16:21 -0700 Message-ID: <4ce8ee3b-21d3-4aa3-8fd5-7dcccc2b8abe@linux.intel.com> Date: Tue, 7 May 2024 16:37:01 -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 34/39] ALSA: usb-audio: Add USB offloading capable kcontrol 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> <20240507195116.9464-35-quic_wcheng@quicinc.com> Content-Language: en-US From: Pierre-Louis Bossart In-Reply-To: <20240507195116.9464-35-quic_wcheng@quicinc.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 5/7/24 14:51, Wesley Cheng wrote: > In order to allow userspace/applications know about USB offloading status, > expose a sound kcontrol that fetches information about which sound card > index is associated with the ASoC platform card supporting offloading. In > the USB audio offloading framework, the ASoC BE DAI link is the entity > responsible for registering to the SOC USB layer. SOC USB will expose more > details about the current offloading status, which includes the USB sound > card and USB PCM device indexes currently being used. > > It is expected for the USB offloading driver to add the kcontrol to the > sound card associated with the USB audio device. An example output would > look like: > > tinymix -D 1 get 'USB Offload Playback Capable Card' > 0 (range -1->32) You already gave the following examples in patch 29: " USB offloading idle: tinymix -D 0 get 'USB Offload Playback Route Status' -->-1, -1 (range -1->32) USB offloading active(USB card#1 pcm#0): tinymix -D 0 get 'USB Offload Playback Route Status' -->1, 0 (range -1->32) " Can you clarify how many controls there would be in the end? Also isn't tinymix -D N going to give you the controls for card N?