From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (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 2AFD810940; Thu, 3 Oct 2024 08:00:16 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727942416; cv=none; b=mRl7YEA7EbBiboJOohYN7mJ2HiMff//XS4kIymOR59krZ6bwX7zprvUoLL++7BSOpysbmWmq+0N3TYP+9G7kqQmW6uMt4fM8+wv2MnYhI4jNfYNEA1EmG0ljJSc2s+LGvdwM2NwNGEcNZFYJmOjE2774FODLkh/t5MMas6xyPB4= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727942416; c=relaxed/simple; bh=YoAvCVp4HtIMRiHkCzZhf/KFXZd0NkaR4FoWZ9wm1Po=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=LkDVPSEdLZwKPjQbCKV3V6J51lBxQxGSPIANjYUPjs7lcZnjSrzRpnLIYRcmcAYJ16ErN14WeQrDl7GptZIb/bM4SbekYQn60hj3r9yuP6rWim5Za4pfuqVsjtxQGdO+pon352hjGlUA1Dxtq1XQSyoBbH4EDoGCsQY5qhUfUvc= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b=WEmtEx+t; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="WEmtEx+t" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 815EEC4CEC7; Thu, 3 Oct 2024 08:00:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1727942416; bh=YoAvCVp4HtIMRiHkCzZhf/KFXZd0NkaR4FoWZ9wm1Po=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=WEmtEx+tFS5bHueV3GqjKU3ouGIX0j/NwPqU05yv4EIU5dngKmYcHz23gUbSuab4U Ls6BkvmMaB2o+pXYQct54xiAMNpMAVlsVY5qas9VD7kE0xs5dY/SWqKOZv9U6fyTpb /swHNlYHAOgqltAUOlVnOv1rk8ZZRvcFjjlNDYfli0lQcHqn9CgbjjShzNzDxFfVwN fUPk5YbPzit9Vin97imTFmX5cgEWpLC8wlyfXOlKHqRDKvTOPZg2E7EKsk+G7aQtcm 7d8qOcnJj2Kb7c2yqOgVtz2DkMGWpqi3ecjLlU/I9dsxdMradOLAQUnWTHatVevuW/ /hycbVKGF6a4g== Date: Thu, 3 Oct 2024 13:30:12 +0530 From: Vinod Koul To: "Liao, Bard" Cc: Bard Liao , "linux-sound@vger.kernel.org" , "linux-kernel@vger.kernel.org" , "pierre-louis.bossart@linux.intel.com" Subject: Re: [PATCH] soundwire: intel_auxdevice: add kernel parameter for mclk divider Message-ID: References: <20240806083840.24094-1-yung-chuan.liao@linux.intel.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: On 19-08-24, 08:13, Liao, Bard wrote: > > > > -----Original Message----- > > From: Vinod Koul > > Sent: Sunday, August 18, 2024 3:24 PM > > To: Bard Liao > > Cc: linux-sound@vger.kernel.org; linux-kernel@vger.kernel.org; pierre- > > louis.bossart@linux.intel.com; Liao, Bard > > Subject: Re: [PATCH] soundwire: intel_auxdevice: add kernel parameter for > > mclk divider > > > > On 06-08-24, 16:38, Bard Liao wrote: > > > From: Pierre-Louis Bossart > > > > > > Add a kernel parameter to work-around discrepancies between hardware > > > and platform firmware, it's not unusual to see e.g. 38.4MHz listed in > > > _DSD properties as the SoundWire clock source, but the hardware may be > > > based on a 19.2 MHz mclk source. > > > > I think this should be documented in kernel-parameters.txt? > > The parameter is only needed when a BIOS provides a MCLK rate which > does not match the actual rate. It is not a normal case and it happens rarely. > Is it really necessary to be documented in kernel-parameters.txt? Yes I think so, all of the parameters are supposed to be documented :-) -- ~Vinod