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From: Maxime Ripard <maxime@cerno.tech>
To: Samuel Holland <samuel@sholland.org>
Cc: Ondrej Jirman <megous@megous.com>,
	alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org,
	Takashi Iwai <tiwai@suse.com>,
	Liam Girdwood <lgirdwood@gmail.com>, Chen-Yu Tsai <wens@csie.org>,
	Mark Brown <broonie@kernel.org>,
	linux-arm-kernel@lists.infradead.org
Subject: Re: [PATCH v2 12/17] ASoC: sun8i-codec: Protect the clock rate while streams are open
Date: Mon, 19 Oct 2020 10:28:08 +0200
Message-ID: <20201019082808.rg3xvo3yjg5g4xpa@gilmour.lan> (raw)
In-Reply-To: <20201014061941.4306-13-samuel@sholland.org>


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On Wed, Oct 14, 2020 at 01:19:36AM -0500, Samuel Holland wrote:
> The codec's clock input is shared among all AIFs, and shared with other
> audio-related hardware in the SoC, including I2S and SPDIF controllers.
> To ensure sample rates selected by userspace or by codec2codec DAI links
> are maintained, the clock rate must be protected while it is in use.
> 
> Signed-off-by: Samuel Holland <samuel@sholland.org>
> ---
>  sound/soc/sunxi/Kconfig       |  1 +
>  sound/soc/sunxi/sun8i-codec.c | 29 +++++++++++++++++++++++++++--
>  2 files changed, 28 insertions(+), 2 deletions(-)
> 
> diff --git a/sound/soc/sunxi/Kconfig b/sound/soc/sunxi/Kconfig
> index 9cd7009cb570..69b9d8515335 100644
> --- a/sound/soc/sunxi/Kconfig
> +++ b/sound/soc/sunxi/Kconfig
> @@ -9,16 +9,17 @@ config SND_SUN4I_CODEC
>  	help
>  	  Select Y or M to add support for the Codec embedded in the Allwinner
>  	  A10 and affiliated SoCs.
>  
>  config SND_SUN8I_CODEC
>  	tristate "Allwinner SUN8I audio codec"
>  	depends on OF
>  	depends on MACH_SUN8I || (ARM64 && ARCH_SUNXI) || COMPILE_TEST
> +	select COMMON_CLK

Wouldn't a depends on make more sense here? It's kind of weird to pull
it from a driver when the platform that would run it has no CCF support.

With this changed,
Acked-by: Maxime Ripard <mripard@kernel.org>

Maxime

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  reply index

Thread overview: 24+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-10-14  6:19 [PATCH v2 00/17] ASoC: sun8i-codec: support for AIF2 and AIF3 Samuel Holland
2020-10-14  6:19 ` [PATCH v2 01/17] ASoC: sun8i-codec: Prepare to extend the DAI driver Samuel Holland
2020-10-14  6:19 ` [PATCH v2 02/17] ASoC: sun8i-codec: Program DAI format before clock inversion Samuel Holland
2020-10-14  6:19 ` [PATCH v2 03/17] ASoC: sun8i-codec: Enable all supported clock inversions Samuel Holland
2020-10-19  8:24   ` Maxime Ripard
2020-10-14  6:19 ` [PATCH v2 04/17] ASoC: sun8i-codec: Use the provided word size Samuel Holland
2020-10-14  6:19 ` [PATCH v2 05/17] ASoC: sun8i-codec: Round up the LRCK divisor Samuel Holland
2020-10-14  6:19 ` [PATCH v2 06/17] ASoC: sun8i-codec: Correct the BCLK divisor calculation Samuel Holland
2020-10-14  6:19 ` [PATCH v2 07/17] ASoC: sun8i-codec: Support the TDM slot binding Samuel Holland
2020-10-14  6:19 ` [PATCH v2 08/17] ASoC: sun8i-codec: Enforce symmetric DAI parameters Samuel Holland
2020-10-14  6:19 ` [PATCH v2 09/17] ASoC: sun8i-codec: Enable all supported sample rates Samuel Holland
2020-10-14  6:19 ` [PATCH v2 10/17] ASoC: sun8i-codec: Automatically set the system sample rate Samuel Holland
2020-10-19  8:25   ` Maxime Ripard
2020-10-14  6:19 ` [PATCH v2 11/17] ASoC: sun8i-codec: Constrain to compatible sample rates Samuel Holland
2020-10-14  6:19 ` [PATCH v2 12/17] ASoC: sun8i-codec: Protect the clock rate while streams are open Samuel Holland
2020-10-19  8:28   ` Maxime Ripard [this message]
2020-10-14  6:19 ` [PATCH v2 13/17] ASoC: sun8i-codec: Require an exact BCLK divisor match Samuel Holland
2020-10-14  6:19 ` [PATCH v2 14/17] ASoC: sun8i-codec: Enable all supported PCM formats Samuel Holland
2020-10-14  6:19 ` [PATCH v2 15/17] ASoC: sun8i-codec: Generalize AIF clock control Samuel Holland
2020-10-19  8:56   ` Maxime Ripard
2020-10-14  6:19 ` [PATCH v2 16/17] ASoC: sun8i-codec: Add the AIF2 DAI, widgets, and routes Samuel Holland
2020-10-14  6:19 ` [PATCH v2 17/17] ASoC: sun8i-codec: Add the AIF3 " Samuel Holland
2020-10-15  3:24   ` Samuel Holland
2020-10-26 23:46 ` [PATCH v2 00/17] ASoC: sun8i-codec: support for AIF2 and AIF3 Mark Brown

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