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Subject[PATCH 2/2] ASoC: msm8916-wcd-analog: Add earpiece
Date
PM8916 supports an earpiece as another (small) speaker.
The earpiece is routed through RX MIX1 similarly to
the headphones, except that RDAC2 MUX is set to RX1.

Signed-off-by: Stephan Gerhold <stephan@gerhold.net>
---
This patch is based on code from the downstream driver
(msm8x16-wcd.c, [1]) with some cleanup.

This enables the earpiece on the Samsung Galaxy A5 (2015),
which has recently gained mainline support in [2].

[1]: https://source.codeaurora.org/quic/la/kernel/msm-3.10/tree/sound/soc/codecs/msm8x16-wcd.c?h=LA.BR.1.2.9.1-02310-8x16.0
[2]: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1329c1ab0730b521e6cd3051c56a2ff3d55f21e6
---
sound/soc/codecs/msm8916-wcd-analog.c | 54 ++++++++++++++++++++++++++-
1 file changed, 52 insertions(+), 2 deletions(-)

diff --git a/sound/soc/codecs/msm8916-wcd-analog.c b/sound/soc/codecs/msm8916-wcd-analog.c
index e3d311fb510e..f53235be77d9 100644
--- a/sound/soc/codecs/msm8916-wcd-analog.c
+++ b/sound/soc/codecs/msm8916-wcd-analog.c
@@ -228,6 +228,10 @@
#define CDC_A_RX_EAR_CTL (0xf19E)
#define RX_EAR_CTL_SPK_VBAT_LDO_EN_MASK BIT(0)
#define RX_EAR_CTL_SPK_VBAT_LDO_EN_ENABLE BIT(0)
+#define RX_EAR_CTL_PA_EAR_PA_EN_MASK BIT(6)
+#define RX_EAR_CTL_PA_EAR_PA_EN_ENABLE BIT(6)
+#define RX_EAR_CTL_PA_SEL_MASK BIT(7)
+#define RX_EAR_CTL_PA_SEL BIT(7)

#define CDC_A_SPKR_DAC_CTL (0xf1B0)
#define SPKR_DAC_CTL_DAC_RESET_MASK BIT(4)
@@ -312,6 +316,7 @@ static const char *const hph_text[] = { "ZERO", "Switch", };
static const struct soc_enum hph_enum = SOC_ENUM_SINGLE_VIRT(
ARRAY_SIZE(hph_text), hph_text);

+static const struct snd_kcontrol_new ear_mux = SOC_DAPM_ENUM("EAR_S", hph_enum);
static const struct snd_kcontrol_new hphl_mux = SOC_DAPM_ENUM("HPHL", hph_enum);
static const struct snd_kcontrol_new hphr_mux = SOC_DAPM_ENUM("HPHR", hph_enum);

@@ -685,6 +690,34 @@ static int pm8916_wcd_analog_enable_spk_pa(struct snd_soc_dapm_widget *w,
return 0;
}

+static int pm8916_wcd_analog_enable_ear_pa(struct snd_soc_dapm_widget *w,
+ struct snd_kcontrol *kcontrol,
+ int event)
+{
+ struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
+
+ switch (event) {
+ case SND_SOC_DAPM_PRE_PMU:
+ snd_soc_component_update_bits(component, CDC_A_RX_EAR_CTL,
+ RX_EAR_CTL_PA_SEL_MASK, RX_EAR_CTL_PA_SEL);
+ break;
+ case SND_SOC_DAPM_POST_PMU:
+ snd_soc_component_update_bits(component, CDC_A_RX_EAR_CTL,
+ RX_EAR_CTL_PA_EAR_PA_EN_MASK,
+ RX_EAR_CTL_PA_EAR_PA_EN_ENABLE);
+ break;
+ case SND_SOC_DAPM_POST_PMD:
+ snd_soc_component_update_bits(component, CDC_A_RX_EAR_CTL,
+ RX_EAR_CTL_PA_EAR_PA_EN_MASK, 0);
+ /* Delay to reduce ear turn off pop */
+ usleep_range(7000, 7100);
+ snd_soc_component_update_bits(component, CDC_A_RX_EAR_CTL,
+ RX_EAR_CTL_PA_SEL_MASK, 0);
+ break;
+ }
+ return 0;
+}
+
static const struct reg_default wcd_reg_defaults_2_0[] = {
{CDC_A_RX_COM_OCP_CTL, 0xD1},
{CDC_A_RX_COM_OCP_COUNT, 0xFF},
@@ -801,12 +834,20 @@ static const struct snd_soc_dapm_route pm8916_wcd_analog_audio_map[] = {
{"PDM_TX", NULL, "A_MCLK2"},
{"A_MCLK2", NULL, "A_MCLK"},

+ /* Earpiece (RX MIX1) */
+ {"EAR", NULL, "EAR_S"},
+ {"EAR_S", "Switch", "EAR PA"},
+ {"EAR PA", NULL, "RX_BIAS"},
+ {"EAR PA", NULL, "HPHL DAC"},
+ {"EAR PA", NULL, "HPHR DAC"},
+ {"EAR PA", NULL, "EAR CP"},
+
/* Headset (RX MIX1 and RX MIX2) */
{"HEADPHONE", NULL, "HPHL PA"},
{"HEADPHONE", NULL, "HPHR PA"},

- {"HPHL PA", NULL, "EAR_HPHL_CLK"},
- {"HPHR PA", NULL, "EAR_HPHR_CLK"},
+ {"HPHL DAC", NULL, "EAR_HPHL_CLK"},
+ {"HPHR DAC", NULL, "EAR_HPHR_CLK"},

{"CP", NULL, "NCP_CLK"},

@@ -847,11 +888,20 @@ static const struct snd_soc_dapm_widget pm8916_wcd_analog_dapm_widgets[] = {
SND_SOC_DAPM_INPUT("AMIC1"),
SND_SOC_DAPM_INPUT("AMIC3"),
SND_SOC_DAPM_INPUT("AMIC2"),
+ SND_SOC_DAPM_OUTPUT("EAR"),
SND_SOC_DAPM_OUTPUT("HEADPHONE"),

/* RX stuff */
SND_SOC_DAPM_SUPPLY("INT_LDO_H", SND_SOC_NOPM, 1, 0, NULL, 0),

+ SND_SOC_DAPM_PGA_E("EAR PA", SND_SOC_NOPM,
+ 0, 0, NULL, 0,
+ pm8916_wcd_analog_enable_ear_pa,
+ SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
+ SND_SOC_DAPM_PRE_PMD | SND_SOC_DAPM_POST_PMD),
+ SND_SOC_DAPM_MUX("EAR_S", SND_SOC_NOPM, 0, 0, &ear_mux),
+ SND_SOC_DAPM_SUPPLY("EAR CP", CDC_A_NCP_EN, 4, 0, NULL, 0),
+
SND_SOC_DAPM_PGA("HPHL PA", CDC_A_RX_HPH_CNP_EN, 5, 0, NULL, 0),
SND_SOC_DAPM_MUX("HPHL", SND_SOC_NOPM, 0, 0, &hphl_mux),
SND_SOC_DAPM_MIXER("HPHL DAC", CDC_A_RX_HPH_L_PA_DAC_CTL, 3, 0, NULL,
--
2.23.0
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