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ASoC: topology: Add missing clock gating parameter when parsing hw_configs

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Clock gating parameter is a part of `dai_fmt`. It is supported by
`alsa-lib` when creating a topology binary file, but ignored by kernel
when loading this topology file.

After applying this commit, the clock gating parameter is not ignored any
more. This solution is backwards compatible. The existing behaviour is
not broken, because by default the parameter value is 0 and is ignored.

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

For example, the following config, based on
alsa-lib/src/conf/topology/broadwell/broadwell.conf, is now supported:

~~~~
SectionHWConfig."CodecHWConfig" {
        id "1"
        format "I2S"            # physical audio format.
        pm_gate_clocks "true"   # clock can be gated
}

SectionLink."Codec" {

        # used for binding to the physical link
        id "0"

        hw_configs [
                "CodecHWConfig"
        ]

        default_hw_conf_id "1"
}
~~~~

Signed-off-by: Kirill Marinushkin <k.marinushkin@gmail.com>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Mark Brown <broonie@kernel.org>
Cc: Pan Xiuli <xiuli.pan@linux.intel.com>
Cc: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Cc: linux-kernel@vger.kernel.org
Cc: alsa-devel@alsa-project.org
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Kirill Marinushkin 2018-04-16 20:26:39 +02:00 • committed by Takashi Iwai
parent 3778a30bb0
commit bdb709ab2a
3 changed files with 12 additions and 3 deletions
Download patch file Download diff file Expand all files Collapse all files

6
src/topology/pcm.c
View file

@ -1233,7 +1233,11 @@ int tplg_parse_hw_config(snd_tplg_t *tplg, snd_config_t *cfg,
return -EINVAL;
if (!strcmp(val, "true"))
hw_cfg->clock_gated = true;
hw_cfg->clock_gated =
SND_SOC_TPLG_DAI_CLK_GATE_GATED;
else
hw_cfg->clock_gated =
SND_SOC_TPLG_DAI_CLK_GATE_CONT;
continue;
}