linux-kernel - Re: [RFC PATCH 00/14] ASoC: qcom: add support to apq8016 audio

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Date:	Tue, 5 May 2015 22:47:58 -0700
From:	Kenneth Westfield <kwestfie@...eaurora.org>
To:	Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Cc:	Patrick Lai <plai@...eaurora.org>, Mark Brown <broonie@...nel.org>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>,
	Ian Campbell <ijc+devicetree@...lion.org.uk>,
	Kumar Gala <galak@...eaurora.org>,
	Banajit Goswami <bgoswami@...eaurora.org>,
	Kenneth Westfield <kwestfie@...eaurora.org>,
	Liam Girdwood <lgirdwood@...il.com>,
	Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.de>,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	alsa-devel@...a-project.org, linux-arm-msm@...r.kernel.org
Subject: Re: [RFC PATCH 00/14] ASoC: qcom: add support to apq8016 audio

On Sat, May 02, 2015 at 04:57:04PM -0700, Kenneth Westfield wrote:
> On Thu, Apr 30, 2015 at 06:15:48PM +0100, Srinivas Kandagatla wrote:
> > Hi All,
> > 
> > This patchset adds apq8016 audio support into lpass driver. Existing
> Lpass
> > driver can not be used as-it-is for apq8016 as it contains code specific
> to
> > ipq806x. Also the driver only supports single i2s port, single dma
> channel and
> > single bitclk control.
> > 
> > APQ8016 has 4 MI2S( Primary, Secondary, Tertiary, Quaternary) which can
> be routed
> > to internal wcd codec or external codecs. This routing is controlled by
> 2 mux
> > registers.
> > 
> > This patch series firstly re-organizes the lpass driver such that the
> SOC
> > specific bits are moved away from the driver. And secondly the SOC
> specifics
> > are now passed as lpass variant data which would include various
> register
> > offsets, dma channel allocations and SOC specific clock handling.
> > 
> > Finally the patchset add apq8016 lpass and machine driver.
> > 
> > This patchset also has two trivial cleanup patches which are to do with
> > redundant checks and removing unnecessary header files.
> > 
> > All these patches are tested for HDMI audio via adv7533 bridge and
> Analog audio
> > on APQ8016-SBC and msm8916-mtp boards. I dont have access to ipq806x
> boards to
> > test these patches.
> > 
> > This is very first version of the patches which was developed with very
> > mimimal/no access to IP documentation. I would like to get your opinon
> on the
> > over all approch.
> > 
> > 
> > Kenneth/Patrick,
> > 	Could you please try these patches on storm board?
> 
> I will test the patches and let you know by Wednesday.  Also, I posted
> some comments, but Patrick should be posting his comments separately
> later next week.

Srinivas,

After applying the patches, audio playback is no longer functional on
the storm board.  Give me some time to debug this and I will get back
to you.

-- 
Kenneth Westfield
Qualcomm Innovation Center, Inc.
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, 
a Linux Foundation Collaborative Project
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