The patch
ASoC: ADAU7002: Add optional delay before start of capture
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.
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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.
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Thanks, Mark
From 7b57085a33ce55e28616f04fd9877ba2ca7e79de Mon Sep 17 00:00:00 2001
From: "Agrawal, Akshu" Akshu.Agrawal@amd.com Date: Tue, 8 Jan 2019 10:24:40 +0000 Subject: [PATCH] ASoC: ADAU7002: Add optional delay before start of capture
On capture through some of dmic we observe a glitch at the start of record. This is because we start capturing even before dmic is ready to send out data. The optional delay will be applied after enabling the mic.
Signed-off-by: Akshu Agrawal akshu.agrawal@amd.com Signed-off-by: Mark Brown broonie@kernel.org --- sound/soc/codecs/adau7002.c | 45 +++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+)
diff --git a/sound/soc/codecs/adau7002.c b/sound/soc/codecs/adau7002.c index fdff86878287..a8deb37fc78a 100644 --- a/sound/soc/codecs/adau7002.c +++ b/sound/soc/codecs/adau7002.c @@ -8,6 +8,7 @@ */
#include <linux/acpi.h> +#include <linux/delay.h> #include <linux/init.h> #include <linux/module.h> #include <linux/of.h> @@ -15,12 +16,55 @@
#include <sound/soc.h>
+struct adau7002_priv { + int wakeup_delay; +}; + +static int adau7002_aif_event(struct snd_soc_dapm_widget *w, + struct snd_kcontrol *kcontrol, int event) +{ + struct snd_soc_component *component = + snd_soc_dapm_to_component(w->dapm); + struct adau7002_priv *adau7002 = + snd_soc_component_get_drvdata(component); + + switch (event) { + case SND_SOC_DAPM_POST_PMU: + if (adau7002->wakeup_delay) + msleep(adau7002->wakeup_delay); + break; + } + + return 0; +} + +static int adau7002_component_probe(struct snd_soc_component *component) +{ + struct adau7002_priv *adau7002; + + adau7002 = devm_kzalloc(component->dev, sizeof(*adau7002), + GFP_KERNEL); + if (!adau7002) + return -ENOMEM; + + device_property_read_u32(component->dev, "wakeup-delay-ms", + &adau7002->wakeup_delay); + + snd_soc_component_set_drvdata(component, adau7002); + + return 0; +} + static const struct snd_soc_dapm_widget adau7002_widgets[] = { + SND_SOC_DAPM_AIF_OUT_E("ADAU AIF", "Capture", 0, + SND_SOC_NOPM, 0, 0, adau7002_aif_event, + SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD), SND_SOC_DAPM_INPUT("PDM_DAT"), SND_SOC_DAPM_REGULATOR_SUPPLY("IOVDD", 0, 0), };
static const struct snd_soc_dapm_route adau7002_routes[] = { + { "ADAU AIF", NULL, "PDM_DAT"}, { "Capture", NULL, "PDM_DAT" }, { "Capture", NULL, "IOVDD" }, }; @@ -40,6 +84,7 @@ static struct snd_soc_dai_driver adau7002_dai = { };
static const struct snd_soc_component_driver adau7002_component_driver = { + .probe = adau7002_component_probe, .dapm_widgets = adau7002_widgets, .num_dapm_widgets = ARRAY_SIZE(adau7002_widgets), .dapm_routes = adau7002_routes,