linux-kernel - Re: [PATCH v3 06/10] ASoC: tegra: add Tegra186 based DSPK driver

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Date:   Thu, 20 Feb 2020 15:10:10 +0000
From:   Jon Hunter <jonathanh@...dia.com>
To:     Sameer Pujar <spujar@...dia.com>, <perex@...ex.cz>,
        <tiwai@...e.com>, <robh+dt@...nel.org>
CC:     <broonie@...nel.org>, <lgirdwood@...il.com>,
        <thierry.reding@...il.com>, <digetx@...il.com>,
        <alsa-devel@...a-project.org>, <devicetree@...r.kernel.org>,
        <linux-tegra@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <sharadg@...dia.com>, <mkumard@...dia.com>,
        <viswanathl@...dia.com>, <rlokhande@...dia.com>,
        <dramesh@...dia.com>, <atalambedu@...dia.com>
Subject: Re: [PATCH v3 06/10] ASoC: tegra: add Tegra186 based DSPK driver


On 20/02/2020 06:34, Sameer Pujar wrote:
> The Digital Speaker Controller (DSPK) converts the multi-bit Pulse Code
> Modulation (PCM) audio input to oversampled 1-bit Pulse Density Modulation
> (PDM) output. From the signal flow perpsective, the DSPK can be viewed as
> a PDM transmitter that up-samples the input to the desired sampling rate
> by interpolation then converts the oversampled PCM input to the desired
> 1-bit output via Delta Sigma Modulation (DSM).
> 
> This patch registers DSPK component with ASoC framework. The component
> driver exposes DAPM widgets, routes and kcontrols for the device. The DAI
> driver exposes DSPK interfaces, which can be used to connect different
> components in the ASoC layer. Makefile and Kconfig support is added to
> allow to build the driver. The DSPK devices can be enabled in the DT via
> "nvidia,tegra186-dspk" compatible binding. This driver can be used
> on Tegra194 chip as well.
> 
> Signed-off-by: Sameer Pujar <spujar@...dia.com>
> ---
>  sound/soc/tegra/Kconfig         |  13 +
>  sound/soc/tegra/Makefile        |   2 +
>  sound/soc/tegra/tegra186_dspk.c | 510 ++++++++++++++++++++++++++++++++++++++++
>  sound/soc/tegra/tegra186_dspk.h |  73 ++++++
>  4 files changed, 598 insertions(+)
>  create mode 100644 sound/soc/tegra/tegra186_dspk.c
>  create mode 100644 sound/soc/tegra/tegra186_dspk.h

Aside from Randy's comment ...

Reviewed-by: Jon Hunter <jonathanh@...dia.com>

Cheers
Jon

-- 
nvpublic