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@xxxxxxxxx>
> Cc: Takashi Sakamoto <o-takashi@xxxxxxxxxxxxx>
> Cc: Jaroslav Kysela <perex@xxxxxxxx>
> Cc: Takashi Iwai <tiwai@xxxxxxxx>
> Cc: alsa-devel@xxxxxxxxxxxxxxxx
> Cc: linux-kernel@xxxxxxxxxxxxxxx
> ---
> 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
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