ASoC: es8316: Add support for inverted jack detect

On some devices (Teclast X98+ II tablet, maybe others), the jack
detection has been wired backwards, so when the ES8316 reports
headphones being present it means they are actually not plugged.

Use a quirk around this incorrect behaviour, which can be enabled
through the 'everest,jack-detect-inverted' boolean device property.

Signed-off-by: Paul Cercueil <paul@crapouillou.net>
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/codecs/es8316.c b/sound/soc/codecs/es8316.c
index 6d4a323..ec2770b 100644 (file)
--- a/sound/soc/codecs/es8316.c
+++ b/sound/soc/codecs/es8316.c
@@ -43,6 +43,7 @@ struct es8316_priv {
        unsigned int sysclk;
        unsigned int allowed_rates[NR_SUPPORTED_MCLK_LRCK_RATIOS];
        struct snd_pcm_hw_constraint_list sysclk_constraints;
+       bool jd_inverted;
 };
 
 /*
@@ -577,6 +578,9 @@ static irqreturn_t es8316_irq(int irq, void *data)
        if (!es8316->jack)
                goto out;
 
+       if (es8316->jd_inverted)
+               flags ^= ES8316_GPIO_FLAG_HP_NOT_INSERTED;
+
        dev_dbg(comp->dev, "gpio flags %#04x\n", flags);
        if (flags & ES8316_GPIO_FLAG_HP_NOT_INSERTED) {
                /* Jack removed, or spurious IRQ? */
@@ -592,6 +596,8 @@ static irqreturn_t es8316_irq(int irq, void *data)
                /* Jack inserted, determine type */
                es8316_enable_micbias_for_mic_gnd_short_detect(comp);
                regmap_read(es8316->regmap, ES8316_GPIO_FLAG, &flags);
+               if (es8316->jd_inverted)
+                       flags ^= ES8316_GPIO_FLAG_HP_NOT_INSERTED;
                dev_dbg(comp->dev, "gpio flags %#04x\n", flags);
                if (flags & ES8316_GPIO_FLAG_HP_NOT_INSERTED) {
                        /* Jack unplugged underneath us */
@@ -633,6 +639,14 @@ static void es8316_enable_jack_detect(struct snd_soc_component *component,
 {
        struct es8316_priv *es8316 = snd_soc_component_get_drvdata(component);
 
+       /*
+        * Init es8316->jd_inverted here and not in the probe, as we cannot
+        * guarantee that the bytchr-es8316 driver, which might set this
+        * property, will probe before us.
+        */
+       es8316->jd_inverted = device_property_read_bool(component->dev,
+                                                       "everest,jack-detect-inverted");
+
        mutex_lock(&es8316->lock);
 
        es8316->jack = jack;