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Date:   Mon, 17 Feb 2020 15:02:08 +0000
From:   Mark Brown <broonie@...nel.org>
To:     Samuel Holland <samuel@...lland.org>
Cc:     Liam Girdwood <lgirdwood@...il.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Maxime Ripard <mripard@...nel.org>,
        Chen-Yu Tsai <wens@...e.org>,
        Vasily Khoruzhick <anarsoul@...il.com>,
        Mylène Josserand 
        <mylene.josserand@...e-electrons.com>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, alsa-devel@...a-project.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org, stable@...nel.org
Subject: Re: [RFC PATCH 05/34] ASoC: sun8i-codec: Remove incorrect
 SND_SOC_DAIFMT_DSP_B

On Mon, Feb 17, 2020 at 12:42:21AM -0600, Samuel Holland wrote:
> DSP_A and DSP_B are not interchangeable. The timing used by the codec in
> DSP mode is consistent with DSP_A. This is verified with an EG25-G modem
> connected to AIF2, as well as by comparing with the BSP driver.
> 
> Remove the DSP_B option, as it is not supported by the hardware.
> 
> Cc: stable@...nel.org
> Fixes: 36c684936fae ("ASoC: Add sun8i digital audio codec")

This can only break things for existing systems using stable, if they
haven't noticed a problem with DSP B they'll certainly notice failing to
set up the DAI at all without it.

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