linux-kernel - [PATCH AUTOSEL 5.10 05/16] ASoC: wm8962: Add an event handler for TEMP_HP and TEMP

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Date:   Sun,  6 Nov 2022 12:05:42 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Xiaolei Wang <xiaolei.wang@...driver.com>,
        Adam Ford <aford173@...il.com>,
        Charles Keepax <ckeepax@...nsource.cirrus.com>,
        Mark Brown <broonie@...nel.org>,
        Sasha Levin <sashal@...nel.org>, lgirdwood@...il.com,
        perex@...ex.cz, tiwai@...e.com, chi.minghao@....com.cn,
        steve@....org, patches@...nsource.cirrus.com,
        alsa-devel@...a-project.org
Subject: [PATCH AUTOSEL 5.10 05/16] ASoC: wm8962: Add an event handler for TEMP_HP and TEMP_SPK

From: Xiaolei Wang <xiaolei.wang@...driver.com>

[ Upstream commit ee1aa2ae3eaa96e70229fa61deee87ef4528ffdf ]

In wm8962 driver, the WM8962_ADDITIONAL_CONTROL_4 is used as a volatile
register, but this register mixes a bunch of volatile status bits and a
bunch of non-volatile control bits. The dapm widgets TEMP_HP and
TEMP_SPK leverages the control bits in this register. After the wm8962
probe, the regmap will bet set to cache only mode, then a read error
like below would be triggered when trying to read the initial power
state of the dapm widgets TEMP_HP and TEMP_SPK.
  wm8962 0-001a: ASoC: error at soc_component_read_no_lock
  on wm8962.0-001a: -16

In order to fix this issue, we add event handler to actually power
up/down these widgets. With this change, we also need to explicitly
power off these widgets in the wm8962 probe since they are enabled
by default.

Signed-off-by: Xiaolei Wang <xiaolei.wang@...driver.com>
Tested-by: Adam Ford <aford173@...il.com>
Acked-by: Charles Keepax <ckeepax@...nsource.cirrus.com>
Link: https://lore.kernel.org/r/20221010092014.2229246-1-xiaolei.wang@windriver.com
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 sound/soc/codecs/wm8962.c | 54 +++++++++++++++++++++++++++++++++++++--
 1 file changed, 52 insertions(+), 2 deletions(-)

diff --git a/sound/soc/codecs/wm8962.c b/sound/soc/codecs/wm8962.c
index 38651022e3d5..21574447650c 100644
--- a/sound/soc/codecs/wm8962.c
+++ b/sound/soc/codecs/wm8962.c
@@ -1840,6 +1840,49 @@ SOC_SINGLE_TLV("SPKOUTR Mixer DACR Volume", WM8962_SPEAKER_MIXER_5,
 	       4, 1, 0, inmix_tlv),
 };
 
+static int tp_event(struct snd_soc_dapm_widget *w,
+		    struct snd_kcontrol *kcontrol, int event)
+{
+	int ret, reg, val, mask;
+	struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
+
+	ret = pm_runtime_resume_and_get(component->dev);
+	if (ret < 0) {
+		dev_err(component->dev, "Failed to resume device: %d\n", ret);
+		return ret;
+	}
+
+	reg = WM8962_ADDITIONAL_CONTROL_4;
+
+	if (!strcmp(w->name, "TEMP_HP")) {
+		mask = WM8962_TEMP_ENA_HP_MASK;
+		val = WM8962_TEMP_ENA_HP;
+	} else if (!strcmp(w->name, "TEMP_SPK")) {
+		mask = WM8962_TEMP_ENA_SPK_MASK;
+		val = WM8962_TEMP_ENA_SPK;
+	} else {
+		pm_runtime_put(component->dev);
+		return -EINVAL;
+	}
+
+	switch (event) {
+	case SND_SOC_DAPM_POST_PMD:
+		val = 0;
+		fallthrough;
+	case SND_SOC_DAPM_POST_PMU:
+		ret = snd_soc_component_update_bits(component, reg, mask, val);
+		break;
+	default:
+		WARN(1, "Invalid event %d\n", event);
+		pm_runtime_put(component->dev);
+		return -EINVAL;
+	}
+
+	pm_runtime_put(component->dev);
+
+	return 0;
+}
+
 static int cp_event(struct snd_soc_dapm_widget *w,
 		    struct snd_kcontrol *kcontrol, int event)
 {
@@ -2133,8 +2176,10 @@ SND_SOC_DAPM_SUPPLY("TOCLK", WM8962_ADDITIONAL_CONTROL_1, 0, 0, NULL, 0),
 SND_SOC_DAPM_SUPPLY_S("DSP2", 1, WM8962_DSP2_POWER_MANAGEMENT,
 		      WM8962_DSP2_ENA_SHIFT, 0, dsp2_event,
 		      SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
-SND_SOC_DAPM_SUPPLY("TEMP_HP", WM8962_ADDITIONAL_CONTROL_4, 2, 0, NULL, 0),
-SND_SOC_DAPM_SUPPLY("TEMP_SPK", WM8962_ADDITIONAL_CONTROL_4, 1, 0, NULL, 0),
+SND_SOC_DAPM_SUPPLY("TEMP_HP", SND_SOC_NOPM, 0, 0, tp_event,
+		SND_SOC_DAPM_POST_PMU|SND_SOC_DAPM_POST_PMD),
+SND_SOC_DAPM_SUPPLY("TEMP_SPK", SND_SOC_NOPM, 0, 0, tp_event,
+		SND_SOC_DAPM_POST_PMU|SND_SOC_DAPM_POST_PMD),
 
 SND_SOC_DAPM_MIXER("INPGAL", WM8962_LEFT_INPUT_PGA_CONTROL, 4, 0,
 		   inpgal, ARRAY_SIZE(inpgal)),
@@ -3760,6 +3805,11 @@ static int wm8962_i2c_probe(struct i2c_client *i2c,
 	if (ret < 0)
 		goto err_pm_runtime;
 
+	regmap_update_bits(wm8962->regmap, WM8962_ADDITIONAL_CONTROL_4,
+			    WM8962_TEMP_ENA_HP_MASK, 0);
+	regmap_update_bits(wm8962->regmap, WM8962_ADDITIONAL_CONTROL_4,
+			    WM8962_TEMP_ENA_SPK_MASK, 0);
+
 	regcache_cache_only(wm8962->regmap, true);
 
 	/* The drivers should power up as needed */
-- 
2.35.1