ASoC: wm8741: Set OSR mode in hw_params() (e9418629) · Commits · 戴 / test

For correct operation of the digital filtering and other processing on the WM8741, the user must ensure the correct value of OSR[1:0] is set at all times.[1] Hence, depending the selected sampling rate, set the OSR (over- sampling rate) mode in hw_params(). References: [1] "WM8741 Data Sheet" Signed-off-by:

Sergej Sawazki <sergej@taudac.com> Acked-by:

Charles Keepax <ckeepax@opensource.cirrus.com> Signed-off-by:

Mark Brown <broonie@kernel.org>

sound/soc/codecs/wm8741.c

+11 −1

Original line number	Diff line number	Diff line
		@@ -196,7 +196,7 @@ static int wm8741_hw_params(struct snd_pcm_substream *substream,
		{
		struct snd_soc_component *component = dai->component;
		struct wm8741_priv *wm8741 = snd_soc_component_get_drvdata(component);
		unsigned int iface;
		unsigned int iface, mode;
		int i;

		/* The set of sample rates that can be supported depends on the
		@@ -240,11 +240,21 @@ static int wm8741_hw_params(struct snd_pcm_substream *substream,
		return -EINVAL;
		}

		/* oversampling rate */
		if (params_rate(params) > 96000)
		mode = 0x40;
		else if (params_rate(params) > 48000)
		mode = 0x20;
		else
		mode = 0x00;

		dev_dbg(component->dev, "wm8741_hw_params: bit size param = %d, rate param = %d",
		params_width(params), params_rate(params));

		snd_soc_component_update_bits(component, WM8741_FORMAT_CONTROL, WM8741_IWL_MASK,
		iface);
		snd_soc_component_update_bits(component, WM8741_MODE_CONTROL_1, WM8741_OSR_MASK,
		mode);

		return 0;
		}

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