linux-kernel - Re: [PATCH v2 1/2] ASoC: topology: Add defines for snd_soc_tplg_hw_config.clock

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Date:   Tue, 20 Feb 2018 18:03:55 +0100
From:   Kirill Marinushkin <k.marinushkin@...il.com>
To:     Takashi Sakamoto <o-takashi@...amocchi.jp>
Cc:     Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 1/2] ASoC: topology: Add defines for
 snd_soc_tplg_hw_config.clock_gated

On 02/19/18 21:36, Kirill Marinushkin wrote:
> In kernel `soc-dai.h`, DAI clock gating is defined as following:
>
> ~~~~
> \#define SND_SOC_DAIFMT_CONT		(1 << 4) /* continuous clock */
> \#define SND_SOC_DAIFMT_GATED		(0 << 4) /* clock is gated */
> ~~~~
>
> The corresponding field of struct snd_soc_tplg_hw_config cannot be used as
> bool values due to the inverted logic. Therefore this commit adds the
> defines for this field.
>
> snd_soc_tplg_hw_config.clock_gated = 0 => no effect
> snd_soc_tplg_hw_config.clock_gated = 1 => SND_SOC_DAIFMT_GATED
> snd_soc_tplg_hw_config.clock_gated = 2 => SND_SOC_DAIFMT_CONT
>
> Signed-off-by: Kirill Marinushkin <k.marinushkin@...il.com>
> Cc: Takashi Sakamoto <o-takashi@...amocchi.jp>
> Cc: Jaroslav Kysela <perex@...ex.cz>
> Cc: Takashi Iwai <tiwai@...e.com>
> Cc: alsa-devel@...a-project.org
> Cc: linux-kernel@...r.kernel.org
> ---
>  include/uapi/sound/asoc.h | 7 ++++++-
>  1 file changed, 6 insertions(+), 1 deletion(-)
>
> diff --git a/include/uapi/sound/asoc.h b/include/uapi/sound/asoc.h
> index 69c37ecbff7e..86d0599a6f13 100644
> --- a/include/uapi/sound/asoc.h
> +++ b/include/uapi/sound/asoc.h
> @@ -139,6 +139,11 @@
>  #define SND_SOC_TPLG_DAI_FLGBIT_SYMMETRIC_CHANNELS      (1 << 1)
>  #define SND_SOC_TPLG_DAI_FLGBIT_SYMMETRIC_SAMPLEBITS    (1 << 2)
>  
> +/* DAI clock gating */
> +#define SND_SOC_TPLG_DAI_CLK_GATE_UNDEFINED	0
> +#define SND_SOC_TPLG_DAI_CLK_GATE_GATED	1
> +#define SND_SOC_TPLG_DAI_CLK_GATE_CONT		2
> +
>  /* DAI physical PCM data formats.
>   * Add new formats to the end of the list.
>   */
> @@ -312,7 +317,7 @@ struct snd_soc_tplg_hw_config {
>  	__le32 size;            /* in bytes of this structure */
>  	__le32 id;		/* unique ID - - used to match */
>  	__le32 fmt;		/* SND_SOC_DAI_FORMAT_ format value */
> -	__u8 clock_gated;	/* 1 if clock can be gated to save power */
> +	__u8 clock_gated;	/* SND_SOC_TPLG_DAI_CLK_GATE_ value */
>  	__u8 invert_bclk;	/* 1 for inverted BCLK, 0 for normal */
>  	__u8 invert_fsync;	/* 1 for inverted frame clock, 0 for normal */
>  	__u8 bclk_master;	/* 1 for master of BCLK, 0 for slave */

This patch is part 1 of 2. I failed to send both of them as a single patch series.
I will resend them properly in a new thread.

Best Regards,
Kirill