[alsa-devel] [PATCH] ASoC: rt5670: Fix GPIO headset detection regression

[Takashi Iwai]

RT5670 codec driver and its machine driver for Intel CHT assume the
implicit GPIO mapping on the index 0 while BIOS on most devices don't
provide it.  The recent commit f10e4bf6632b ("gpio: acpi: Even more
tighten up ACPI GPIO lookups") restricts such cases and it resulted in
a regression where the headset jack setup fails like:

  rt5670 i2c-10EC5672:00: ASoC: Cannot get gpio at index 0: -2
  rt5670 i2c-10EC5672:00: Adding jack GPIO failed

For fixing this, we need to provide the GPIO mapping explicitly in the
machine driver.  Also this patch corrects the string to be passed to
gpiolib to match with the pre-given mapping, too.

Fixes: f10e4bf6632b ("gpio: acpi: Even more tighten up ACPI GPIO lookups")
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=115531
Reported-by: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>
Tested-by: Pierre-Louis Bossart <pierre-louis.bossart at linux.intel.com>
Signed-off-by: Takashi Iwai <tiwai at suse.de>
---
 sound/soc/codecs/rt5670.c               |  2 +-
 sound/soc/intel/boards/cht_bsw_rt5672.c | 10 ++++++++++
 2 files changed, 11 insertions(+), 1 deletion(-)

diff --git a/sound/soc/codecs/rt5670.c b/sound/soc/codecs/rt5670.c
index 0ec7985ed306..054b613cb0d0 100644
--- a/sound/soc/codecs/rt5670.c
+++ b/sound/soc/codecs/rt5670.c
@@ -567,7 +567,7 @@ int rt5670_set_jack_detect(struct snd_soc_codec *codec,
 
 	rt5670->jack = jack;
 	rt5670->hp_gpio.gpiod_dev = codec->dev;
-	rt5670->hp_gpio.name = "headphone detect";
+	rt5670->hp_gpio.name = "headset";
 	rt5670->hp_gpio.report = SND_JACK_HEADSET |
 		SND_JACK_BTN_0 | SND_JACK_BTN_1 | SND_JACK_BTN_2;
 	rt5670->hp_gpio.debounce_time = 150;
diff --git a/sound/soc/intel/boards/cht_bsw_rt5672.c b/sound/soc/intel/boards/cht_bsw_rt5672.c
index bc2a52de06a3..f597d5582223 100644
--- a/sound/soc/intel/boards/cht_bsw_rt5672.c
+++ b/sound/soc/intel/boards/cht_bsw_rt5672.c
@@ -184,6 +184,13 @@ static int cht_aif1_hw_params(struct snd_pcm_substream *substream,
 	return 0;
 }
 
+static const struct acpi_gpio_params headset_gpios = { 0, 0, false };
+
+static const struct acpi_gpio_mapping cht_rt5672_gpios[] = {
+	{ "headset-gpios", &headset_gpios, 1 },
+	{},
+};
+
 static int cht_codec_init(struct snd_soc_pcm_runtime *runtime)
 {
 	int ret;
@@ -191,6 +198,9 @@ static int cht_codec_init(struct snd_soc_pcm_runtime *runtime)
 	struct snd_soc_codec *codec = codec_dai->codec;
 	struct cht_mc_private *ctx = snd_soc_card_get_drvdata(runtime->card);
 
+	if (devm_acpi_dev_add_driver_gpios(codec->dev, cht_rt5672_gpios))
+		dev_warn(runtime->dev, "Unable to add GPIO mapping table\n");
+
 	/* TDM 4 slots 24 bit, set Rx & Tx bitmask to 4 active slots */
 	ret = snd_soc_dai_set_tdm_slot(codec_dai, 0xF, 0xF, 4, 24);
 	if (ret < 0) {
-- 
2.14.0