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ASoC: rk3399_gru_sound: fix recording pop at first attempt

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Pop happens when mclk applied but dmic's own boot-time
Specify dmic delay times in dt to make sure
clocks are ready earlier than dmic working

Signed-off-by: Wonjoon Lee <woojoo.lee@samsung.com>
Signed-off-by: Xing Zheng <zhengxing@rock-chips.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Wonjoon Lee 2016-09-22 21:50:06 +08:00 committed by Mark Brown
parent 22b93eaf55
commit 3a6f9dce61
2 changed files with 21 additions and 0 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

7
Documentation/devicetree/bindings/sound/rockchip,rk3399-gru-sound.txt
View file

@ -6,10 +6,17 @@ Required properties:
connected to the codecs
- rockchip,codec: The phandle of the MAX98357A/RT5514/DA7219 codecs
Optional properties:
- dmic-wakeup-delay-ms : specify delay time (ms) for DMIC ready.
If this option is specified, which means it's required dmic need
delay for DMIC to ready so that rt5514 can avoid recording before
DMIC send valid data
Example:
sound {
compatible = "rockchip,rk3399-gru-sound";
rockchip,cpu = <&i2s0>;
rockchip,codec = <&max98357a &rt5514 &da7219>;
dmic-wakeup-delay-ms = <20>;
};

14
sound/soc/rockchip/rk3399_gru_sound.c
View file

@ -38,6 +38,8 @@
#define SOUND_FS 256
unsigned int rt5514_dmic_delay;
static struct snd_soc_jack rockchip_sound_jack;
static const struct snd_soc_dapm_widget rockchip_dapm_widgets[] = {
@ -123,6 +125,9 @@ static int rockchip_sound_rt5514_hw_params(struct snd_pcm_substream *substream,
return ret;
}
/* Wait for DMIC stable */
msleep(rt5514_dmic_delay);
return 0;
}
@ -343,6 +348,15 @@ static int rockchip_sound_probe(struct platform_device *pdev)
return -ENODEV;
}
/* Set DMIC delay */
ret = device_property_read_u32(&pdev->dev, "dmic-delay",
&rt5514_dmic_delay);
if (ret) {
rt5514_dmic_delay = 0;
dev_dbg(&pdev->dev,
"no optional property 'dmic-delay' found, default: no delay\n");
}
rockchip_dailinks[DAILINK_RT5514_DSP].cpu_name = kstrdup_const(dev_name(dev), GFP_KERNEL);
rockchip_dailinks[DAILINK_RT5514_DSP].cpu_dai_name = kstrdup_const(dev_name(dev), GFP_KERNEL);
rockchip_dailinks[DAILINK_RT5514_DSP].platform_name = kstrdup_const(dev_name(dev), GFP_KERNEL);