[alsa-devel] Applied "ASoC: topology: Add missing clock gating parameter when parsing hw_configs" to the asoc tree

[Mark Brown]

The patch

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

has been applied to the asoc tree at

   https://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From bdb86c40e8c5d2abe2ec7be964d621c1b7c27081 Mon Sep 17 00:00:00 2001
From: Kirill Marinushkin <k.marinushkin at gmail.com>
Date: Mon, 19 Feb 2018 21:36:35 +0100
Subject: [PATCH] ASoC: topology: Add missing clock gating parameter when
 parsing hw_configs

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. The old behaviour is not broken, as by default the parameter value
is 0.

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.
        bclk   "master"         # Platform is master of bit clock
        fsync  "master"         # platform is master of fsync
        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 at gmail.com>
Cc: Takashi Sakamoto <o-takashi at sakamocchi.jp>
Cc: Liam Girdwood <lgirdwood at gmail.com>
Cc: Mark Brown <broonie at kernel.org>
Cc: Jaroslav Kysela <perex at perex.cz>
Cc: Takashi Iwai <tiwai at suse.com>
Cc: alsa-devel at alsa-project.org
Cc: linux-kernel at vger.kernel.org
Signed-off-by: Mark Brown <broonie at kernel.org>
---
 sound/soc/soc-topology.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/sound/soc/soc-topology.c b/sound/soc/soc-topology.c
index 01a50413c66f..bac70676a6b4 100644
--- a/sound/soc/soc-topology.c
+++ b/sound/soc/soc-topology.c
@@ -1981,6 +1981,13 @@ static void set_link_hw_format(struct snd_soc_dai_link *link,
 
 		link->dai_fmt = hw_config->fmt & SND_SOC_DAIFMT_FORMAT_MASK;
 
+		/* clock gating */
+		if (hw_config->clock_gated == SND_SOC_TPLG_DAI_CLK_GATE_GATED)
+			link->dai_fmt |= SND_SOC_DAIFMT_GATED;
+		else if (hw_config->clock_gated ==
+			 SND_SOC_TPLG_DAI_CLK_GATE_CONT)
+			link->dai_fmt |= SND_SOC_DAIFMT_CONT;
+
 		/* clock signal polarity */
 		invert_bclk = hw_config->invert_bclk;
 		invert_fsync = hw_config->invert_fsync;
-- 
2.16.1