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ASoC: wm5102: Add controls to allow shaping of ultrasonic response

PATCH Applied Charles Keepax 2 participants 2 messages Jun 6, 2014 – Jun 9, 2014

Subsystems (4)
Sound ASoC Multifunction devices (MFD) Wolfson microelectronics drivers
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Charles Keepax

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PATCH v2 1/1 ASoC: wm5102: Add controls to allow shaping of ultrasonic response

Add controls to allow custom shaping of the ultrasonic response. This custom shaping can be turned on/off at runtime, although, it should be noted that settings will not affect a currently open audio stream, they will be applied when the next audio stream is started.

Signed-off-by Charles Keepax <[email protected]>

---

Changes since v1:
- Now uses the existing BYTES_EXT control
- Delayed other patch in the series, this patch should still work fine, just some pointless caching of the DAC_COMP registers will happen

 include/linux/mfd/arizona/core.h |    3 ++
 sound/soc/codecs/arizona.c       |   34 +++++++++++++++++++++
 sound/soc/codecs/wm5102.c        |   62 ++++++++++++++++++++++++++++++++++++++
 3 files changed, 99 insertions(+), 0 deletions(-)
include/linux/mfd/arizona/core.h +3 -0
index 11783b5..5592651 100644
@@ -113,6 +113,9 @@ struct arizona {
 
 	int tdm_width[ARIZONA_MAX_AIF];
 	int tdm_slots[ARIZONA_MAX_AIF];
+
+	uint16_t dac_comp_coeff;
+	uint8_t dac_comp_enabled;
 };
 
 int arizona_clk32k_enable(struct arizona *arizona);
sound/soc/codecs/arizona.c +34 -0
index e77f61c..41b56ee 100644
@@ -1127,6 +1127,31 @@ static int arizona_startup(struct snd_pcm_substream *substream,
 					  constraint);
 }
 
+static void arizona_wm5102_set_dac_comp(struct snd_soc_codec *codec,
+					unsigned int rate)
+{
+	struct arizona_priv *priv = snd_soc_codec_get_drvdata(codec);
+	struct arizona *arizona = priv->arizona;
+	struct reg_default dac_comp[] = {
+		{ 0x80, 0x3 },
+		{ ARIZONA_DAC_COMP_1, 0 },
+		{ ARIZONA_DAC_COMP_2, 0 },
+		{ 0x80, 0x0 },
+	};
+
+	mutex_lock(&codec->mutex);
+
+	dac_comp[1].def = arizona->dac_comp_coeff;
+	if (rate >= 176400)
+		dac_comp[2].def = arizona->dac_comp_enabled;
+
+	mutex_unlock(&codec->mutex);
+
+	regmap_multi_reg_write(arizona->regmap,
+			       dac_comp,
+			       ARRAY_SIZE(dac_comp));
+}
+
 static int arizona_hw_params_rate(struct snd_pcm_substream *substream,
 				  struct snd_pcm_hw_params *params,
 				  struct snd_soc_dai *dai)

@@ -1153,6 +1178,15 @@ static int arizona_hw_params_rate(struct snd_pcm_substream *substream,
 
 	switch (dai_priv->clk) {
 	case ARIZONA_CLK_SYSCLK:
+		switch (priv->arizona->type) {
+		case WM5102:
+			arizona_wm5102_set_dac_comp(codec,
+						    params_rate(params));
+			break;
+		default:
+			break;
+		}
+
 		snd_soc_update_bits(codec, ARIZONA_SAMPLE_RATE_1,
 				    ARIZONA_SAMPLE_RATE_1_MASK, sr_val);
 		if (base)
sound/soc/codecs/wm5102.c +62 -0

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Signature · 1 line
1.7.2.5
maintainer Applied
#1 lore raw
Quoted 4 lines · Charles Keepax

Add controls to allow custom shaping of the ultrasonic response. This custom shaping can be turned on/off at runtime, although, it should be noted that settings will not affect a currently open audio stream, they will be applied when the next audio stream is started.

Applied, thanks.