linux-kernel - Re: [RFC PATCH] ASoC: dpcm: Apply symmetry for DPCM

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Message-ID: <1449860966.2499.17.camel@loki>
Date:	Fri, 11 Dec 2015 19:09:26 +0000
From:	Liam Girdwood <liam.r.girdwood@...ux.intel.com>
To:	Koro Chen <koro.chen@...iatek.com>
Cc:	broonie@...nel.org, tiwai@...e.de, srv_heupstream@...iatek.com,
	linux-mediatek@...ts.infradead.org, s.hauer@...gutronix.de,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	alsa-devel@...a-project.org, PC Liao <pc.liao@...iatek.com>
Subject: Re: [RFC PATCH] ASoC: dpcm: Apply symmetry for DPCM

On Fri, 2015-12-11 at 11:33 +0800, Koro Chen wrote:
> From: PC Liao <pc.liao@...iatek.com>
> 
> DPCM does not fully support symmetry attributes. soc_pcm_apply_symmetry()
> is skipped in soc_pcm_open() for DPCM, without being applied elsewhere.
> So HW parameters cannot be correctly limited, and user space can do
> playback/capture at different rates while HW actually does not support it.
> soc_pcm_params_symmetry() will return error and the second stream stops.
> 
> This patch adds soc_pcm_apply_symmetry() for FE, BE, and codec DAIs
> in DPCM path that was skipped in soc_pcm_open().
> 
> Signed-off-by: PC Liao <pc.liao@...iatek.com>
> Signed-off-by: Koro Chen <koro.chen@...iatek.com>

Acked-by: Liam Girdwood <liam.r.girdwood@...ux.intel.com>

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