[alsa-devel] ASoC: nau8825: make crosstalk function optional

[John Hsu]

Make crosstalk functoin optional.
The jack detection can speed up without crosstalk detection.
Let the decision of function usage to platform design.

The patch helps the issue concern as follows:
Google issue 35574278: Chell_headphone pop back from S3

Signed-off-by: John Hsu <KCHSU0 at nuvoton.com>
Signed-off-by: John Hsu <supercraig0719 at gmail.com>
---
 sound/soc/codecs/nau8825.c | 6 +++++-
 sound/soc/codecs/nau8825.h | 1 +
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/sound/soc/codecs/nau8825.c b/sound/soc/codecs/nau8825.c
index ff827bb..fd307f5 100644
--- a/sound/soc/codecs/nau8825.c
+++ b/sound/soc/codecs/nau8825.c
@@ -1682,7 +1682,7 @@ static irqreturn_t nau8825_interrupt(int irq, void *data)
 	} else if (active_irq & NAU8825_HEADSET_COMPLETION_IRQ) {
 		if (nau8825_is_jack_inserted(regmap)) {
 			event |= nau8825_jack_insert(nau8825);
-			if (!nau8825->high_imped) {
+			if (!nau8825->xtalk_bypass && !nau8825->high_imped) {
 				/* Apply the cross talk suppression in the
 				 * headset without high impedance.
 				 */
@@ -2498,6 +2498,10 @@ static int nau8825_read_device_properties(struct device *dev,
 		&nau8825->jack_eject_debounce);
 	if (ret)
 		nau8825->jack_eject_debounce = 0;
+	ret = device_property_read_u32(dev, "nuvoton,crosstalk-bypass",
+		&nau8825->xtalk_bypass);
+	if (ret)
+		nau8825->xtalk_bypass = 1;
 
 	nau8825->mclk = devm_clk_get(dev, "mclk");
 	if (PTR_ERR(nau8825->mclk) == -EPROBE_DEFER) {
diff --git a/sound/soc/codecs/nau8825.h b/sound/soc/codecs/nau8825.h
index 514fd13..8aee5c86 100644
--- a/sound/soc/codecs/nau8825.h
+++ b/sound/soc/codecs/nau8825.h
@@ -476,6 +476,7 @@ struct nau8825 {
 	int xtalk_event_mask;
 	bool xtalk_protect;
 	int imp_rms[NAU8825_XTALK_IMM];
+	int xtalk_bypass;
 };
 
 int nau8825_enable_jack_detect(struct snd_soc_codec *codec,
-- 
2.6.4