ASoC: tlv320aic32x4: Enable fast charge

At power-up the analog circuits may take up to one full second before
being charged with the default configuration. Using the analog blocks
before they are ready generates a *very* crappy sound.

Enable the fast charge feature, which will require a bit more power
than normal charge but will definitely speed up the starting operation
by shrinking this delay to up to 40 ms.

Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/r/20200911173140.29984-4-miquel.raynal@bootlin.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/codecs/tlv320aic32x4.c b/sound/soc/codecs/tlv320aic32x4.c
index 2e2d8e4..ea8cd44 100644 (file)
--- a/sound/soc/codecs/tlv320aic32x4.c
+++ b/sound/soc/codecs/tlv320aic32x4.c
@@ -1013,6 +1013,14 @@ static int aic32x4_component_probe(struct snd_soc_component *component)
                                AIC32X4_LADC_EN | AIC32X4_RADC_EN);
        snd_soc_component_write(component, AIC32X4_ADCSETUP, tmp_reg);
 
+       /*
+        * Enable the fast charging feature and ensure the needed 40ms ellapsed
+        * before using the analog circuits.
+        */
+       snd_soc_component_write(component, AIC32X4_REFPOWERUP,
+                               AIC32X4_REFPOWERUP_40MS);
+       msleep(40);
+
        return 0;
 }
 

diff --git a/sound/soc/codecs/tlv320aic32x4.h b/sound/soc/codecs/tlv320aic32x4.h
index 38f4770..7550122 100644 (file)
--- a/sound/soc/codecs/tlv320aic32x4.h
+++ b/sound/soc/codecs/tlv320aic32x4.h
@@ -96,6 +96,7 @@ int aic32x4_register_clocks(struct device *dev, const char *mclk_name);
 #define AIC32X4_FLOATINGINPUT  AIC32X4_REG(1, 58)
 #define AIC32X4_LMICPGAVOL     AIC32X4_REG(1, 59)
 #define AIC32X4_RMICPGAVOL     AIC32X4_REG(1, 60)
+#define AIC32X4_REFPOWERUP     AIC32X4_REG(1, 123)
 
 /* Bits, masks, and shifts */
 
@@ -205,6 +206,12 @@ int aic32x4_register_clocks(struct device *dev, const char *mclk_name);
 #define AIC32X4_RMICPGANIN_IN1L_10K    0x10
 #define AIC32X4_RMICPGANIN_CM1R_10K    0x40
 
+/* AIC32X4_REFPOWERUP */
+#define AIC32X4_REFPOWERUP_SLOW                0x04
+#define AIC32X4_REFPOWERUP_40MS                0x05
+#define AIC32X4_REFPOWERUP_80MS                0x06
+#define AIC32X4_REFPOWERUP_120MS       0x07
+
 /* Common mask and enable for all of the dividers */
 #define AIC32X4_DIVEN           BIT(7)
 #define AIC32X4_DIV_MASK        GENMASK(6, 0)