[PATCH v1 0/6] ASoC: codecs: msm8916-wcd-analog: Add support to MBHC

[PATCH v1 0/6] ASoC: codecs: msm8916-wcd-analog: Add support to MBHC

[srinivas.kandagatla]

From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>

This patchset adds support to MBHC(Multibutton headset control) block in PM8916
analog block. MBHC support comes from2 blocks first mechanical headset detection
and second headset type, 5 button detection.

This patchset adds support to:
1> Support to NC and NO type of headset Jacks.
2> Mechanical insertion and detection of headset jack.
3> Detect a 3 pole Headphone and a 4 pole Headset.
4> Detect 5 buttons.

First patch fixes error code returned by snd_soc_codec_set_jack() to be
more precise for users. Second patch is patch from Damien, followed by few
fixes to codec driver w.r.t mbhc and final patch to add mbhc support.

Damien sent a similar patchset to add support to mechanical detection,
but that patch has issues and will not work on most usecases (for example
after a playback/capture session, multicodec case). So I only picked up
the BIT mask patch from that series.

Tested it on DB410c with Audio Mezz board with 4 pole and 3 pole
and during playback and recording use cases.

root@linaro-alip:~# evtest 
No device specified, trying to scan all of /dev/input/event*
Available devices:
/dev/input/event0:      pm8941_pwrkey
/dev/input/event1:      DB410c Headset Jack
/dev/input/event2:      gpio_keys
Select the device event number [0-2]: 1
Input driver version is 1.0.1
Input device ID: bus 0x0 vendor 0x0 product 0x0 version 0x0
Input device name: "DB410c Headset Jack"
Supported events:
  Event type 0 (EV_SYN)
  Event type 1 (EV_KEY)
    Event code 114 (KEY_VOLUMEDOWN)
    Event code 115 (KEY_VOLUMEUP)
    Event code 226 (KEY_MEDIA)
    Event code 260 (BTN_4)
    Event code 582 (KEY_VOICECOMMAND)
  Event type 5 (EV_SW)
    Event code 2 (SW_HEADPHONE_INSERT) state 1
    Event code 4 (SW_MICROPHONE_INSERT) state 1
Properties:
Testing ... (interrupt to exit)
Event: time 1501001112.059684, type 1 (EV_KEY), code 226 (KEY_MEDIA), value 1
Event: time 1501001112.059684, type 5 (EV_SW), code 2 (SW_HEADPHONE_INSERT), value 0
Event: time 1501001112.059684, type 5 (EV_SW), code 4 (SW_MICROPHONE_INSERT), value 0
Event: time 1501001112.059684, -------------- SYN_REPORT ------------
Event: time 1501001112.254116, type 1 (EV_KEY), code 226 (KEY_MEDIA), value 0
Event: time 1501001112.254116, -------------- SYN_REPORT ------------
Event: time 1501001113.154184, type 1 (EV_KEY), code 114 (KEY_VOLUMEDOWN), value 1
Event: time 1501001113.154184, -------------- SYN_REPORT ------------
Event: time 1501001113.319658, type 1 (EV_KEY), code 114 (KEY_VOLUMEDOWN), value 0
Event: time 1501001113.319658, -------------- SYN_REPORT ------------
Event: time 1501001113.781084, type 1 (EV_KEY), code 226 (KEY_MEDIA), value 1
Event: time 1501001113.781084, -------------- SYN_REPORT ------------
Event: time 1501001114.024930, type 1 (EV_KEY), code 226 (KEY_MEDIA), value 0
Event: time 1501001114.024930, -------------- SYN_REPORT ------------
Event: time 1501001114.419082, type 1 (EV_KEY), code 114 (KEY_VOLUMEDOWN), value 1
Event: time 1501001114.419082, -------------- SYN_REPORT ------------
Event: time 1501001114.576011, type 1 (EV_KEY), code 114 (KEY_VOLUMEDOWN), value 0
Event: time 1501001114.576011, -------------- SYN_REPORT ------------
Event: time 1501001114.795281, type 1 (EV_KEY), code 114 (KEY_VOLUMEDOWN), value 1
Event: time 1501001114.795281, -------------- SYN_REPORT ------------
Event: time 1501001114.863333, type 1 (EV_KEY), code 114 (KEY_VOLUMEDOWN), value 0
Event: time 1501001114.863333, -------------- SYN_REPORT ------------
Event: time 1501001116.603372, type 1 (EV_KEY), code 226 (KEY_MEDIA), value 1
Event: time 1501001116.603372, -------------- SYN_REPORT ------------
Damien Riegel (1):
  ASoC: codecs: msm8916-analog: fix DIG_CLK_CTL_RXD3_CLK_EN define

Srinivas Kandagatla (5):
  ASoC: jack: fix snd_soc_codec_set_jack return error
  ASoC: codecs: msm8916-wcd-analog: move codec reset to probe
  ASoC: codecs: msm8916-wcd-analog: set default micbias voltage to 1.8
  ASoC: codecs: msm8916-wcd-analog: add MBHC support
  ASoC: qcom: apq8016-sbc: Add support to Headset JACK

 .../bindings/sound/qcom,msm8916-wcd-analog.txt     |   9 +
 sound/soc/codecs/msm8916-wcd-analog.c              | 359 +++++++++++++++++++--
 sound/soc/codecs/msm8916-wcd.h                     |  12 +
 sound/soc/qcom/apq8016_sbc.c                       |  52 +++
 sound/soc/soc-jack.c                               |   2 +-
 5 files changed, 410 insertions(+), 24 deletions(-)
 create mode 100644 sound/soc/codecs/msm8916-wcd.h

-- 
2.9.3

[PATCH v1 1/6] ASoC: jack: fix snd_soc_codec_set_jack return error

[srinivas.kandagatla]

From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>

This patch changes the error code returned by snd_soc_codec_set_jack()
from -EINVAL to -ENOTSUPP. The reason to do this is to make the caller
aware that the underlying codec does not support this callback. This can
make the caller write the code to handle this case properly.
Other reason is that -EINVAL is not the correct error to return in this
case anyway.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
---
 sound/soc/soc-jack.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/soc-jack.c b/sound/soc/soc-jack.c
index 7daf21f..42ca9f1 100644
--- a/sound/soc/soc-jack.c
+++ b/sound/soc/soc-jack.c
@@ -36,7 +36,7 @@ int snd_soc_codec_set_jack(struct snd_soc_codec *codec,
 	if (codec->driver->set_jack)
 		return codec->driver->set_jack(codec, jack, data);
 	else
-		return -EINVAL;
+		return -ENOTSUPP;
 }
 EXPORT_SYMBOL_GPL(snd_soc_codec_set_jack);
 
-- 
2.9.3

[PATCH v1 2/6] ASoC: codecs: msm8916-analog: fix DIG_CLK_CTL_RXD3_CLK_EN define

[srinivas.kandagatla]

From: Damien Riegel <damien.riegel@savoirfairelinux.com>

The wrong bit is assigned to DIG_CLK_CTL_RXD3_CLK_EN, change it for the
correct one.

Signed-off-by: Damien Riegel <damien.riegel@savoirfairelinux.com>
Acked-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
---
 sound/soc/codecs/msm8916-wcd-analog.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/codecs/msm8916-wcd-analog.c b/sound/soc/codecs/msm8916-wcd-analog.c
index a788029..5710fd4 100644
--- a/sound/soc/codecs/msm8916-wcd-analog.c
+++ b/sound/soc/codecs/msm8916-wcd-analog.c
@@ -36,7 +36,7 @@
 #define CDC_D_CDC_DIG_CLK_CTL		(0xf04A)
 #define DIG_CLK_CTL_RXD1_CLK_EN		BIT(0)
 #define DIG_CLK_CTL_RXD2_CLK_EN		BIT(1)
-#define DIG_CLK_CTL_RXD3_CLK_EN		BIT(3)
+#define DIG_CLK_CTL_RXD3_CLK_EN		BIT(2)
 #define DIG_CLK_CTL_TXD_CLK_EN		BIT(4)
 #define DIG_CLK_CTL_NCP_CLK_EN_MASK	BIT(6)
 #define DIG_CLK_CTL_NCP_CLK_EN		BIT(6)
-- 
2.9.3

[PATCH v1 3/6] ASoC: codecs: msm8916-wcd-analog: move codec reset to probe

[srinivas.kandagatla]

From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>

This patch move the codec reset code from dai ops to codec probe, so
that the codec is not held in reset when headset detection block is
still active.

Without this patch the codec block will be in reset as long as its not
actively used, which means headset events will not be functional if the
codec dai is not actively used.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
---
 sound/soc/codecs/msm8916-wcd-analog.c | 30 ++++++------------------------
 1 file changed, 6 insertions(+), 24 deletions(-)

diff --git a/sound/soc/codecs/msm8916-wcd-analog.c b/sound/soc/codecs/msm8916-wcd-analog.c
index 5710fd4..6606954 100644
--- a/sound/soc/codecs/msm8916-wcd-analog.c
+++ b/sound/soc/codecs/msm8916-wcd-analog.c
@@ -536,6 +536,9 @@ static int pm8916_wcd_analog_probe(struct snd_soc_codec *codec)
 		snd_soc_write(codec, wcd_reg_defaults_2_0[reg].reg,
 			      wcd_reg_defaults_2_0[reg].def);
 
+	snd_soc_update_bits(codec, CDC_D_CDC_RST_CTL,
+			    RST_CTL_DIG_SW_RST_N_MASK,
+			    RST_CTL_DIG_SW_RST_N_REMOVE_RESET);
 	return 0;
 }
 
@@ -543,6 +546,9 @@ static int pm8916_wcd_analog_remove(struct snd_soc_codec *codec)
 {
 	struct pm8916_wcd_analog_priv *priv = dev_get_drvdata(codec->dev);
 
+	snd_soc_update_bits(codec, CDC_D_CDC_RST_CTL,
+			    RST_CTL_DIG_SW_RST_N_MASK, 0);
+
 	return regulator_bulk_disable(ARRAY_SIZE(priv->supplies),
 				      priv->supplies);
 }
@@ -736,28 +742,6 @@ static struct regmap *pm8916_get_regmap(struct device *dev)
 	return dev_get_regmap(dev->parent, NULL);
 }
 
-static int pm8916_wcd_analog_startup(struct snd_pcm_substream *substream,
-				      struct snd_soc_dai *dai)
-{
-	snd_soc_update_bits(dai->codec, CDC_D_CDC_RST_CTL,
-			    RST_CTL_DIG_SW_RST_N_MASK,
-			    RST_CTL_DIG_SW_RST_N_REMOVE_RESET);
-
-	return 0;
-}
-
-static void pm8916_wcd_analog_shutdown(struct snd_pcm_substream *substream,
-					 struct snd_soc_dai *dai)
-{
-	snd_soc_update_bits(dai->codec, CDC_D_CDC_RST_CTL,
-			    RST_CTL_DIG_SW_RST_N_MASK, 0);
-}
-
-static struct snd_soc_dai_ops pm8916_wcd_analog_dai_ops = {
-	.startup = pm8916_wcd_analog_startup,
-	.shutdown = pm8916_wcd_analog_shutdown,
-};
-
 static struct snd_soc_dai_driver pm8916_wcd_analog_dai[] = {
 	[0] = {
 	       .name = "pm8916_wcd_analog_pdm_rx",
@@ -769,7 +753,6 @@ static struct snd_soc_dai_driver pm8916_wcd_analog_dai[] = {
 			    .channels_min = 1,
 			    .channels_max = 3,
 			    },
-	       .ops = &pm8916_wcd_analog_dai_ops,
 	       },
 	[1] = {
 	       .name = "pm8916_wcd_analog_pdm_tx",
@@ -781,7 +764,6 @@ static struct snd_soc_dai_driver pm8916_wcd_analog_dai[] = {
 			   .channels_min = 1,
 			   .channels_max = 4,
 			   },
-	       .ops = &pm8916_wcd_analog_dai_ops,
 	       },
 };
 
-- 
2.9.3

[PATCH v1 4/6] ASoC: codecs: msm8916-wcd-analog: set default micbias voltage to 1.8

[srinivas.kandagatla]

From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>

This patch sets the default internal micbias voltage to 1.8v. This
default value is required for mbhc buttons to work. Also adds dt
bindings to allow the board level file to specify the required default
micbias value.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
---
 .../bindings/sound/qcom,msm8916-wcd-analog.txt       |  1 +
 sound/soc/codecs/msm8916-wcd-analog.c                | 20 ++++++++++++++------
 2 files changed, 15 insertions(+), 6 deletions(-)

diff --git a/Documentation/devicetree/bindings/sound/qcom,msm8916-wcd-analog.txt b/Documentation/devicetree/bindings/sound/qcom,msm8916-wcd-analog.txt
index ccb401c..05b67a1 100644
--- a/Documentation/devicetree/bindings/sound/qcom,msm8916-wcd-analog.txt
+++ b/Documentation/devicetree/bindings/sound/qcom,msm8916-wcd-analog.txt
@@ -33,6 +33,7 @@ Required properties
  - vdd-micbias-supply: phandle of VDD_MICBIAS supply's regulator DT node.
 
 Optional Properties:
+- qcom,micbias-lvl:  Voltage (mV) for Mic Bias
 - qcom,micbias1-ext-cap: boolean, present if micbias1 has external capacitor
 			 connected.
 - qcom,micbias2-ext-cap: boolean, present if micbias2 has external capacitor
diff --git a/sound/soc/codecs/msm8916-wcd-analog.c b/sound/soc/codecs/msm8916-wcd-analog.c
index 6606954..69df0ee 100644
--- a/sound/soc/codecs/msm8916-wcd-analog.c
+++ b/sound/soc/codecs/msm8916-wcd-analog.c
@@ -93,8 +93,13 @@
 #define MICB_1_EN_TX3_GND_SEL_TX_GND	0
 
 #define CDC_A_MICB_1_VAL		(0xf141)
+#define MICB_DEFAULT_VAL 1800
+#define MICB_MIN_VAL 1600
+#define MICB_STEP_SIZE 50
+#define MICB_VOLTAGE_REGVAL(v)		((v - MICB_MIN_VAL)/MICB_STEP_SIZE)
 #define MICB_1_VAL_MICB_OUT_VAL_MASK	GENMASK(7, 3)
 #define MICB_1_VAL_MICB_OUT_VAL_V2P70V	((0x16)  << 3)
+#define MICB_1_VAL_MICB_OUT_VAL_V1P80V	((0x4)  << 3)
 #define CDC_A_MICB_1_CTL		(0xf142)
 
 #define MICB_1_CTL_CFILT_REF_SEL_MASK		BIT(1)
@@ -225,6 +230,7 @@ struct pm8916_wcd_analog_priv {
 	struct regulator_bulk_data supplies[ARRAY_SIZE(supply_names)];
 	unsigned int micbias1_cap_mode;
 	unsigned int micbias2_cap_mode;
+	unsigned int micbias_mv;
 };
 
 static const char *const adc2_mux_text[] = { "ZERO", "INP2", "INP3" };
@@ -265,18 +271,16 @@ static const struct snd_kcontrol_new pm8916_wcd_analog_snd_controls[] = {
 
 static void pm8916_wcd_analog_micbias_enable(struct snd_soc_codec *codec)
 {
+	struct pm8916_wcd_analog_priv *wcd = snd_soc_codec_get_drvdata(codec);
+
 	snd_soc_update_bits(codec, CDC_A_MICB_1_CTL,
 			    MICB_1_CTL_EXT_PRECHARG_EN_MASK |
 			    MICB_1_CTL_INT_PRECHARG_BYP_MASK,
 			    MICB_1_CTL_INT_PRECHARG_BYP_EXT_PRECHRG_SEL
 			    | MICB_1_CTL_EXT_PRECHARG_EN_ENABLE);
 
-	snd_soc_write(codec, CDC_A_MICB_1_VAL, MICB_1_VAL_MICB_OUT_VAL_V2P70V);
-	/*
-	 * Special headset needs MICBIAS as 2.7V so wait for
-	 * 50 msec for the MICBIAS to reach 2.7 volts.
-	 */
-	msleep(50);
+	snd_soc_write(codec, CDC_A_MICB_1_VAL,
+		      MICB_VOLTAGE_REGVAL(wcd->micbias_mv));
 	snd_soc_update_bits(codec, CDC_A_MICB_1_CTL,
 			    MICB_1_CTL_EXT_PRECHARG_EN_MASK |
 			    MICB_1_CTL_INT_PRECHARG_BYP_MASK, 0);
@@ -795,6 +799,10 @@ static int pm8916_wcd_analog_parse_dt(struct device *dev,
 	else
 		priv->micbias2_cap_mode = MICB_1_EN_NO_EXT_BYP_CAP;
 
+	if (of_property_read_u32(dev->of_node, "qcom,micbias-lvl",
+				 &priv->micbias_mv))
+		priv->micbias_mv = MICB_DEFAULT_VAL;
+
 	return 0;
 }
 
-- 
2.9.3

[PATCH v1 5/6] ASoC: codecs: msm8916-wcd-analog: add MBHC support

[srinivas.kandagatla]

From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>

MBHC (MultiButton Headset Control) support is available in pm8921 in two
blocks, one to detect mechanical headset insertion and removal and other
block to support headset type detection and 5 button detection and othe
features like impedance calculation.

This patch adds support to:
1> Support to NC and NO type of headset Jacks.
2> Mechanical insertion and detection of headset jack.
3> Detect a 3 pole Headphone and a 4 pole Headset.
4> Detect 5 buttons.

Tested it on DB410c with Audio Mezz board with 4 pole and 3 pole
headset/headphones.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
---
 .../bindings/sound/qcom,msm8916-wcd-analog.txt     |   8 +
 sound/soc/codecs/msm8916-wcd-analog.c              | 323 +++++++++++++++++++++
 sound/soc/codecs/msm8916-wcd.h                     |  12 +
 3 files changed, 343 insertions(+)
 create mode 100644 sound/soc/codecs/msm8916-wcd.h

diff --git a/Documentation/devicetree/bindings/sound/qcom,msm8916-wcd-analog.txt b/Documentation/devicetree/bindings/sound/qcom,msm8916-wcd-analog.txt
index 05b67a1..c46401c 100644
--- a/Documentation/devicetree/bindings/sound/qcom,msm8916-wcd-analog.txt
+++ b/Documentation/devicetree/bindings/sound/qcom,msm8916-wcd-analog.txt
@@ -34,6 +34,14 @@ Required properties
 
 Optional Properties:
 - qcom,micbias-lvl:  Voltage (mV) for Mic Bias
+- qcom,hphl-jack-type-normally-open: boolean, present if hphl pin on jack is a
+				     NO (Normally Open). If not specified, then
+				     its assumed that hphl pin on jack is NC
+				     (Normally Closed).
+- qcom,gnd-jack-type-normally-open: boolean, present if gnd pin on jack is
+				    NO (Normally Open). If not specified, then
+				    its assumed that gnd pin on jack is NC
+				    (Normally Closed).
 - qcom,micbias1-ext-cap: boolean, present if micbias1 has external capacitor
 			 connected.
 - qcom,micbias2-ext-cap: boolean, present if micbias2 has external capacitor
diff --git a/sound/soc/codecs/msm8916-wcd-analog.c b/sound/soc/codecs/msm8916-wcd-analog.c
index 69df0ee..4db2349 100644
--- a/sound/soc/codecs/msm8916-wcd-analog.c
+++ b/sound/soc/codecs/msm8916-wcd-analog.c
@@ -12,9 +12,21 @@
 #include <sound/pcm.h>
 #include <sound/pcm_params.h>
 #include <sound/tlv.h>
+#include <sound/jack.h>
+#include "msm8916-wcd.h"
 
 #define CDC_D_REVISION1			(0xf000)
 #define CDC_D_PERPH_SUBTYPE		(0xf005)
+#define CDC_D_INT_EN_SET		(0x015)
+#define CDC_D_INT_EN_CLR		(0x016)
+#define MBHC_SWITCH_INT			BIT(7)
+#define MBHC_MIC_ELECTRICAL_INS_REM_DET	BIT(6)
+#define MBHC_BUTTON_PRESS_DET		BIT(5)
+#define MBHC_BUTTON_RELEASE_DET		BIT(4)
+#define CDC_DEF_INT_MASK	(MBHC_SWITCH_INT | \
+			MBHC_MIC_ELECTRICAL_INS_REM_DET	| \
+			MBHC_BUTTON_PRESS_DET | \
+			MBHC_BUTTON_RELEASE_DET)
 #define CDC_D_CDC_RST_CTL		(0xf046)
 #define RST_CTL_DIG_SW_RST_N_MASK	BIT(7)
 #define RST_CTL_DIG_SW_RST_N_RESET	0
@@ -37,6 +49,8 @@
 #define DIG_CLK_CTL_RXD1_CLK_EN		BIT(0)
 #define DIG_CLK_CTL_RXD2_CLK_EN		BIT(1)
 #define DIG_CLK_CTL_RXD3_CLK_EN		BIT(2)
+#define DIG_CLK_CTL_D_MBHC_CLK_EN_MASK	BIT(3)
+#define DIG_CLK_CTL_D_MBHC_CLK_EN	BIT(3)
 #define DIG_CLK_CTL_TXD_CLK_EN		BIT(4)
 #define DIG_CLK_CTL_NCP_CLK_EN_MASK	BIT(6)
 #define DIG_CLK_CTL_NCP_CLK_EN		BIT(6)
@@ -133,8 +147,51 @@
 #define MICB_1_INT_TX3_INT_PULLUP_EN_TX1N_TO_GND	0
 
 #define CDC_A_MICB_2_EN			(0xf144)
+#define CDC_A_MICB_2_EN_ENABLE		BIT(7)
+#define CDC_A_MICB_2_PULL_DOWN_EN_MASK	BIT(5)
+#define CDC_A_MICB_2_PULL_DOWN_EN	BIT(5)
 #define CDC_A_TX_1_2_ATEST_CTL_2	(0xf145)
 #define CDC_A_MASTER_BIAS_CTL		(0xf146)
+#define CDC_A_MBHC_DET_CTL_1		(0xf147)
+#define CDC_A_MBHC_DET_CTL_L_DET_EN			BIT(7)
+#define CDC_A_MBHC_DET_CTL_GND_DET_EN			BIT(6)
+#define CDC_A_MBHC_DET_CTL_MECH_DET_TYPE_INSERTION	BIT(5)
+#define CDC_A_MBHC_DET_CTL_MECH_DET_TYPE_REMOVAL	(0)
+#define CDC_A_MBHC_DET_CTL_MECH_DET_TYPE_MASK		BIT(5)
+#define CDC_A_MBHC_DET_CTL_MECH_DET_TYPE_SHIFT		(5)
+#define CDC_A_MBHC_DET_CTL_MIC_CLAMP_CTL_AUTO		BIT(4)
+#define CDC_A_MBHC_DET_CTL_MIC_CLAMP_CTL_MANUAL		BIT(3)
+#define CDC_A_MBHC_DET_CTL_MIC_CLAMP_CTL_MASK		GENMASK(4, 3)
+#define CDC_A_MBHC_DET_CTL_MBHC_BIAS_EN			BIT(2)
+#define CDC_A_MBHC_DET_CTL_2		(0xf150)
+#define CDC_A_MBHC_DET_CTL_HS_L_DET_PULL_UP_CTRL_I_3P0	(BIT(7) | BIT(6))
+#define CDC_A_MBHC_DET_CTL_HS_L_DET_COMPA_CTRL_V0P9_VDD	BIT(5)
+#define CDC_A_PLUG_TYPE_MASK				GENMASK(4, 3)
+#define CDC_A_HPHL_PLUG_TYPE_NO				BIT(4)
+#define CDC_A_GND_PLUG_TYPE_NO				BIT(3)
+#define CDC_A_MBHC_DET_CTL_HPHL_100K_TO_GND_EN_MASK	BIT(0)
+#define CDC_A_MBHC_DET_CTL_HPHL_100K_TO_GND_EN		BIT(0)
+#define CDC_A_MBHC_FSM_CTL		(0xf151)
+#define CDC_A_MBHC_FSM_CTL_MBHC_FSM_EN			BIT(7)
+#define CDC_A_MBHC_FSM_CTL_MBHC_FSM_EN_MASK		BIT(7)
+#define CDC_A_MBHC_FSM_CTL_BTN_ISRC_CTRL_I_100UA	(0x3 << 4)
+#define CDC_A_MBHC_FSM_CTL_BTN_ISRC_CTRL_MASK		GENMASK(6, 4)
+#define CDC_A_MBHC_DBNC_TIMER		(0xf152)
+#define CDC_A_MBHC_DBNC_TIMER_BTN_DBNC_T_16MS		BIT(3)
+#define CDC_A_MBHC_DBNC_TIMER_INSREM_DBNC_T_256_MS	(0x9 << 4)
+#define CDC_A_MBHC_BTN0_ZDET_CTL_0	(0xf153)
+#define CDC_A_MBHC_BTN1_ZDET_CTL_1	(0xf154)
+#define CDC_A_MBHC_BTN2_ZDET_CTL_2	(0xf155)
+#define CDC_A_MBHC_BTN3_CTL		(0xf156)
+#define CDC_A_MBHC_BTN4_CTL		(0xf157)
+#define CDC_A_MBHC_BTN_VREF_FINE_SHIFT	(2)
+#define CDC_A_MBHC_BTN_VREF_FINE_MASK	GENMASK(4, 2)
+#define CDC_A_MBHC_BTN_VREF_COARSE_MASK	GENMASK(7, 5)
+#define CDC_A_MBHC_BTN_VREF_COARSE_SHIFT (5)
+#define CDC_A_MBHC_BTN_VREF_MASK	(CDC_A_MBHC_BTN_VREF_COARSE_MASK | \
+					CDC_A_MBHC_BTN_VREF_FINE_MASK)
+#define CDC_A_MBHC_RESULT_1		(0xf158)
+#define CDC_A_MBHC_RESULT_1_BTN_RESULT_MASK	GENMASK(4, 0)
 #define CDC_A_TX_1_EN			(0xf160)
 #define CDC_A_TX_2_EN			(0xf161)
 #define CDC_A_TX_1_2_TEST_CTL_1		(0xf162)
@@ -226,8 +283,18 @@ static const char * const supply_names[] = {
 struct pm8916_wcd_analog_priv {
 	u16 pmic_rev;
 	u16 codec_version;
+	int	mbhc_sw_irq;
+	int	mbhc_btn_press_irq;
+	int	mbhc_btn_release_irq;
+	/* special event to detect accessory type */
+	bool	mbhc_btn0_pressed;
 	struct clk *mclk;
+	struct snd_soc_codec *codec;
 	struct regulator_bulk_data supplies[ARRAY_SIZE(supply_names)];
+	struct snd_soc_jack *jack;
+	bool hphl_jack_type_normally_open;
+	bool gnd_jack_type_normally_open;
+	struct msm8916_wcd_mbhc_data mbhc_data;
 	unsigned int micbias1_cap_mode;
 	unsigned int micbias2_cap_mode;
 	unsigned int micbias_mv;
@@ -365,6 +432,92 @@ static int pm8916_wcd_analog_enable_micbias_int1(struct
 						     wcd->micbias1_cap_mode);
 }
 
+static void pm8916_wcd_setup_mbhc(struct pm8916_wcd_analog_priv *wcd)
+{
+	struct snd_soc_codec *codec = wcd->codec;
+	u32 plug_type = 0;
+
+	snd_soc_write(codec, CDC_A_MBHC_DET_CTL_1,
+		      CDC_A_MBHC_DET_CTL_L_DET_EN |
+		      CDC_A_MBHC_DET_CTL_MECH_DET_TYPE_INSERTION |
+		      CDC_A_MBHC_DET_CTL_MIC_CLAMP_CTL_AUTO |
+		      CDC_A_MBHC_DET_CTL_MBHC_BIAS_EN);
+
+	if (wcd->hphl_jack_type_normally_open)
+		plug_type = CDC_A_HPHL_PLUG_TYPE_NO;
+
+	if (wcd->gnd_jack_type_normally_open)
+		plug_type |= CDC_A_GND_PLUG_TYPE_NO;
+
+	snd_soc_write(codec, CDC_A_MBHC_DET_CTL_2,
+		      CDC_A_MBHC_DET_CTL_HS_L_DET_PULL_UP_CTRL_I_3P0 |
+		      CDC_A_MBHC_DET_CTL_HS_L_DET_COMPA_CTRL_V0P9_VDD |
+		      plug_type |
+		      CDC_A_MBHC_DET_CTL_HPHL_100K_TO_GND_EN);
+
+
+	snd_soc_write(codec, CDC_A_MBHC_DBNC_TIMER,
+		      CDC_A_MBHC_DBNC_TIMER_INSREM_DBNC_T_256_MS |
+		      CDC_A_MBHC_DBNC_TIMER_BTN_DBNC_T_16MS);
+
+	/* enable MBHC clock */
+	snd_soc_update_bits(codec, CDC_D_CDC_DIG_CLK_CTL,
+			    DIG_CLK_CTL_D_MBHC_CLK_EN_MASK,
+			    DIG_CLK_CTL_D_MBHC_CLK_EN);
+
+	snd_soc_update_bits(codec, CDC_D_INT_EN_CLR, CDC_DEF_INT_MASK, 0);
+	snd_soc_update_bits(codec, CDC_D_INT_EN_SET, CDC_DEF_INT_MASK,
+			    CDC_DEF_INT_MASK);
+	wcd->mbhc_btn0_pressed = false;
+}
+
+static int pm8916_mbhc_configure_bias(struct pm8916_wcd_analog_priv *priv,
+				      bool micbias2_enabled)
+{
+	struct snd_soc_codec *codec = priv->codec;
+	u32 coarse, fine, reg_val, reg_addr;
+	int *vrefs, i;
+
+	if (!micbias2_enabled) { /* use internal 100uA Current source */
+		/* Enable internal 2.2k Internal Rbias Resistor */
+		snd_soc_update_bits(codec, CDC_A_MICB_1_INT_RBIAS,
+				    MICB_1_INT_TX2_INT_RBIAS_EN_MASK,
+				    MICB_1_INT_TX2_INT_RBIAS_EN_ENABLE);
+		/* Remove pull down on MIC BIAS2 */
+		snd_soc_update_bits(codec, CDC_A_MICB_2_EN,
+				   CDC_A_MICB_2_PULL_DOWN_EN_MASK,
+				   0);
+		/* enable 100uA internal current source */
+		snd_soc_update_bits(codec, CDC_A_MBHC_FSM_CTL,
+				    CDC_A_MBHC_FSM_CTL_BTN_ISRC_CTRL_MASK,
+				    CDC_A_MBHC_FSM_CTL_BTN_ISRC_CTRL_I_100UA);
+	}
+	snd_soc_update_bits(codec, CDC_A_MBHC_FSM_CTL,
+			CDC_A_MBHC_FSM_CTL_MBHC_FSM_EN_MASK,
+			CDC_A_MBHC_FSM_CTL_MBHC_FSM_EN);
+
+	if (micbias2_enabled)
+		vrefs = &priv->mbhc_data.vref_btn_micb[0];
+	else
+		vrefs = &priv->mbhc_data.vref_btn_cs[0];
+
+	/* program vref ranges for all the buttons */
+	reg_addr = CDC_A_MBHC_BTN0_ZDET_CTL_0;
+	for (i = 0; i <  MBHC_MAX_BUTTONS; i++) {
+		/* split mv in to coarse parts of 100mv & fine parts of 12mv */
+		coarse = (vrefs[i] / 100);
+		fine = ((vrefs[i] % 100) / 12);
+		reg_val = (coarse << CDC_A_MBHC_BTN_VREF_COARSE_SHIFT) |
+			 (fine << CDC_A_MBHC_BTN_VREF_FINE_SHIFT);
+		snd_soc_update_bits(codec, reg_addr,
+			       CDC_A_MBHC_BTN_VREF_MASK,
+			       reg_val);
+		reg_addr++;
+	}
+
+	return 0;
+}
+
 static int pm8916_wcd_analog_enable_micbias_int2(struct
 						  snd_soc_dapm_widget
 						  *w, struct snd_kcontrol
@@ -373,6 +526,15 @@ static int pm8916_wcd_analog_enable_micbias_int2(struct
 	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
 	struct pm8916_wcd_analog_priv *wcd = snd_soc_codec_get_drvdata(codec);
 
+	switch (event) {
+	case SND_SOC_DAPM_POST_PMU:
+		pm8916_mbhc_configure_bias(wcd, true);
+		break;
+	case SND_SOC_DAPM_POST_PMD:
+		pm8916_mbhc_configure_bias(wcd, false);
+		break;
+	}
+
 	return pm8916_wcd_analog_enable_micbias_int(codec, event, w->reg,
 						     wcd->micbias2_cap_mode);
 }
@@ -540,9 +702,14 @@ static int pm8916_wcd_analog_probe(struct snd_soc_codec *codec)
 		snd_soc_write(codec, wcd_reg_defaults_2_0[reg].reg,
 			      wcd_reg_defaults_2_0[reg].def);
 
+	priv->codec = codec;
+
 	snd_soc_update_bits(codec, CDC_D_CDC_RST_CTL,
 			    RST_CTL_DIG_SW_RST_N_MASK,
 			    RST_CTL_DIG_SW_RST_N_REMOVE_RESET);
+
+	pm8916_wcd_setup_mbhc(priv);
+
 	return 0;
 }
 
@@ -741,11 +908,110 @@ static const struct snd_soc_dapm_widget pm8916_wcd_analog_dapm_widgets[] = {
 	SND_SOC_DAPM_SUPPLY("A_MCLK2", CDC_D_CDC_TOP_CLK_CTL, 3, 0, NULL, 0),
 };
 
+static int pm8916_wcd_analog_set_jack(struct snd_soc_codec *codec,
+				      struct snd_soc_jack *jack,
+				      void *data)
+{
+	struct msm8916_wcd_mbhc_data *d = data;
+	struct pm8916_wcd_analog_priv *wcd = snd_soc_codec_get_drvdata(codec);
+
+	wcd->jack = jack;
+	wcd->mbhc_data = *d;
+
+	return 0;
+}
+
 static struct regmap *pm8916_get_regmap(struct device *dev)
 {
 	return dev_get_regmap(dev->parent, NULL);
 }
 
+static irqreturn_t mbhc_btn_release_irq_handler(int irq, void *arg)
+{
+	struct pm8916_wcd_analog_priv *priv = arg;
+	struct snd_soc_codec *codec = priv->codec;
+	u32 btn_result;
+
+	btn_result = snd_soc_read(codec, CDC_A_MBHC_RESULT_1) &
+				  CDC_A_MBHC_RESULT_1_BTN_RESULT_MASK;
+
+	if (!btn_result)
+		priv->mbhc_btn0_pressed = false;
+
+	snd_jack_report(priv->jack->jack, 0);
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t mbhc_btn_press_irq_handler(int irq, void *arg)
+{
+	struct pm8916_wcd_analog_priv *priv = arg;
+	struct snd_soc_codec *codec = priv->codec;
+	u32 btn_result;
+
+	btn_result = snd_soc_read(codec, CDC_A_MBHC_RESULT_1) &
+				  CDC_A_MBHC_RESULT_1_BTN_RESULT_MASK;
+
+	switch (btn_result) {
+	case 0xf:
+		snd_jack_report(priv->jack->jack, SND_JACK_BTN_4);
+		break;
+	case 0x7:
+		snd_jack_report(priv->jack->jack, SND_JACK_BTN_3);
+		break;
+	case 0x3:
+		snd_jack_report(priv->jack->jack, SND_JACK_BTN_2);
+		break;
+	case 0x1:
+		snd_jack_report(priv->jack->jack, SND_JACK_BTN_1);
+		break;
+	case 0:
+		priv->mbhc_btn0_pressed = true;
+		snd_jack_report(priv->jack->jack, SND_JACK_BTN_0);
+		break;
+	}
+
+	return IRQ_HANDLED;
+}
+
+static irqreturn_t pm8916_mbhc_switch_irq_handler(int irq, void *arg)
+{
+	struct pm8916_wcd_analog_priv *priv = arg;
+	struct snd_soc_codec *codec = priv->codec;
+	bool micbias_enabled = false;
+	bool ins = false;
+
+	if (snd_soc_read(codec, CDC_A_MBHC_DET_CTL_1) &
+				CDC_A_MBHC_DET_CTL_MECH_DET_TYPE_MASK)
+		ins = true;
+
+	/* Set the detection type appropriately */
+	snd_soc_update_bits(codec, CDC_A_MBHC_DET_CTL_1,
+			    CDC_A_MBHC_DET_CTL_MECH_DET_TYPE_MASK,
+			    (!ins << CDC_A_MBHC_DET_CTL_MECH_DET_TYPE_SHIFT));
+	if (ins) { /* hs insertion */
+		if (snd_soc_read(codec, CDC_A_MICB_2_EN) &
+				CDC_A_MICB_2_EN_ENABLE)
+			micbias_enabled = true;
+
+		pm8916_mbhc_configure_bias(priv, micbias_enabled);
+
+		/*
+		 * if only a btn press event is receive just before
+		 * insert event then its a 3 pole headphone
+		 */
+		if (priv->mbhc_btn0_pressed)
+			snd_jack_report(priv->jack->jack, SND_JACK_HEADPHONE);
+		else
+			snd_jack_report(priv->jack->jack, SND_JACK_HEADSET);
+
+	} else { /* removal */
+		snd_jack_report(priv->jack->jack, 0);
+	}
+
+	return IRQ_HANDLED;
+}
+
 static struct snd_soc_dai_driver pm8916_wcd_analog_dai[] = {
 	[0] = {
 	       .name = "pm8916_wcd_analog_pdm_rx",
@@ -774,6 +1040,7 @@ static struct snd_soc_dai_driver pm8916_wcd_analog_dai[] = {
 static struct snd_soc_codec_driver pm8916_wcd_analog = {
 	.probe = pm8916_wcd_analog_probe,
 	.remove = pm8916_wcd_analog_remove,
+	.set_jack = pm8916_wcd_analog_set_jack,
 	.get_regmap = pm8916_get_regmap,
 	.component_driver = {
 		.controls = pm8916_wcd_analog_snd_controls,
@@ -803,6 +1070,18 @@ static int pm8916_wcd_analog_parse_dt(struct device *dev,
 				 &priv->micbias_mv))
 		priv->micbias_mv = MICB_DEFAULT_VAL;
 
+	if (of_property_read_bool(dev->of_node,
+				  "qcom,hphl-jack-type-normally-open"))
+		priv->hphl_jack_type_normally_open = true;
+	else
+		priv->hphl_jack_type_normally_open = false;
+
+	if (of_property_read_bool(dev->of_node,
+				  "qcom,gnd-jack-type-normally-open"))
+		priv->gnd_jack_type_normally_open = true;
+	else
+		priv->gnd_jack_type_normally_open = false;
+
 	return 0;
 }
 
@@ -842,6 +1121,50 @@ static int pm8916_wcd_analog_spmi_probe(struct platform_device *pdev)
 		return ret;
 	}
 
+	priv->mbhc_sw_irq = platform_get_irq_byname(pdev, "mbhc_switch_int");
+	if (priv->mbhc_sw_irq < 0) {
+		dev_err(dev, "failed to get mbhc switch irq\n");
+		return priv->mbhc_sw_irq;
+	}
+
+	priv->mbhc_btn_press_irq = platform_get_irq_byname(pdev,
+							"mbhc_but_press_det");
+	if (priv->mbhc_btn_press_irq < 0) {
+		dev_err(dev, "failed to get button press irq\n");
+		return priv->mbhc_btn_press_irq;
+	}
+
+	priv->mbhc_btn_release_irq = platform_get_irq_byname(pdev,
+							"mbhc_but_rel_det");
+	if (priv->mbhc_btn_release_irq < 0) {
+		dev_err(dev, "failed to get button release irq\n");
+		return priv->mbhc_btn_release_irq;
+	}
+
+	ret = devm_request_irq(dev, priv->mbhc_btn_release_irq,
+			       mbhc_btn_release_irq_handler,
+				IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING |
+				IRQF_ONESHOT,
+				       "mbhc btn release irq", priv);
+	if (ret)
+		dev_err(dev, "cannot request mbhc button release irq\n");
+
+	ret = devm_request_irq(dev, priv->mbhc_btn_press_irq,
+			       mbhc_btn_press_irq_handler,
+				IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING |
+				IRQF_ONESHOT,
+				       "mbhc btn press irq", priv);
+	if (ret)
+		dev_err(dev, "cannot request mbhc button press irq\n");
+
+	ret = devm_request_irq(dev, priv->mbhc_sw_irq,
+			       pm8916_mbhc_switch_irq_handler,
+				IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING |
+				IRQF_ONESHOT,
+				       "mbhc switch irq", priv);
+	if (ret)
+		dev_err(dev, "cannot request mbhc switch irq\n");
+
 	dev_set_drvdata(dev, priv);
 
 	return snd_soc_register_codec(dev, &pm8916_wcd_analog,
diff --git a/sound/soc/codecs/msm8916-wcd.h b/sound/soc/codecs/msm8916-wcd.h
new file mode 100644
index 0000000..23f1d7a
--- /dev/null
+++ b/sound/soc/codecs/msm8916-wcd.h
@@ -0,0 +1,12 @@
+#ifndef _MSM8916_WCD_H_
+#define _MSM8916_WCD_H_
+
+#define MBHC_MAX_BUTTONS	(5)
+struct msm8916_wcd_mbhc_data {
+	/* Voltage threshold when internal current source of 100uA is used */
+	int vref_btn_cs[MBHC_MAX_BUTTONS];
+	/* Voltage threshold when microphone bias is ON */
+	int vref_btn_micb[MBHC_MAX_BUTTONS];
+};
+
+#endif /* _MSM8916_WCD_H_ */
-- 
2.9.3

[PATCH v1 6/6] ASoC: qcom: apq8016-sbc: Add support to Headset JACK

[srinivas.kandagatla]

From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>

This patch adds support to Headset JACK, also provides board specific
vref ranges for mbhc buttons to be detected.

This headset supports both 3 pole and 5 pole headset type and 5 buttons.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
---
 sound/soc/qcom/apq8016_sbc.c | 52 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 52 insertions(+)

diff --git a/sound/soc/qcom/apq8016_sbc.c b/sound/soc/qcom/apq8016_sbc.c
index f07aa1e..ccb3620 100644
--- a/sound/soc/qcom/apq8016_sbc.c
+++ b/sound/soc/qcom/apq8016_sbc.c
@@ -21,12 +21,18 @@
 #include <linux/platform_device.h>
 #include <sound/pcm.h>
 #include <sound/pcm_params.h>
+#include <sound/jack.h>
 #include <sound/soc.h>
+#include <uapi/linux/input-event-codes.h>
 #include <dt-bindings/sound/apq8016-lpass.h>
+#include "../codecs/msm8916-wcd.h"
 
 struct apq8016_sbc_data {
 	void __iomem *mic_iomux;
 	void __iomem *spkr_iomux;
+	struct snd_soc_jack jack;
+	struct msm8916_wcd_mbhc_data mbhc_data;
+	bool jack_setup;
 	struct snd_soc_dai_link dai_link[];	/* dynamically allocated */
 };
 
@@ -43,6 +49,7 @@ static int apq8016_sbc_dai_init(struct snd_soc_pcm_runtime *rtd)
 	struct snd_soc_dai_link *dai_link = rtd->dai_link;
 	struct snd_soc_card *card = rtd->card;
 	struct apq8016_sbc_data *pdata = snd_soc_card_get_drvdata(card);
+	struct msm8916_wcd_mbhc_data *data;
 	int i, rval;
 
 	switch (cpu_dai->id) {
@@ -70,6 +77,45 @@ static int apq8016_sbc_dai_init(struct snd_soc_pcm_runtime *rtd)
 
 	}
 
+	if (!pdata->jack_setup) {
+		struct snd_jack *jack;
+
+		rval = snd_soc_card_jack_new(card, "Headset Jack",
+					     SND_JACK_HEADSET |
+					     SND_JACK_HEADPHONE |
+					     SND_JACK_BTN_0 | SND_JACK_BTN_1 |
+					     SND_JACK_BTN_2 | SND_JACK_BTN_3 |
+					     SND_JACK_BTN_4,
+					     &pdata->jack, NULL, 0);
+
+		if (rval < 0) {
+			dev_err(card->dev, "Unable to add Headphone Jack\n");
+			return rval;
+		}
+
+		jack = pdata->jack.jack;
+
+		snd_jack_set_key(jack, SND_JACK_BTN_0, KEY_MEDIA);
+		snd_jack_set_key(jack, SND_JACK_BTN_1, KEY_VOICECOMMAND);
+		snd_jack_set_key(jack, SND_JACK_BTN_2, KEY_VOLUMEUP);
+		snd_jack_set_key(jack, SND_JACK_BTN_3, KEY_VOLUMEDOWN);
+
+		/* board specific vref thresholds in mv */
+		data = &pdata->mbhc_data;
+		data->vref_btn_cs[0] = 75;
+		data->vref_btn_micb[0] = 75;
+		data->vref_btn_cs[1] = 150;
+		data->vref_btn_micb[1] = 150;
+		data->vref_btn_cs[2] = 237;
+		data->vref_btn_micb[2] = 237;
+		data->vref_btn_cs[3] = 450;
+		data->vref_btn_micb[3] = 450;
+		data->vref_btn_cs[4] = 500;
+		data->vref_btn_micb[4] = 500;
+
+		pdata->jack_setup = true;
+	}
+
 	for (i = 0 ; i < dai_link->num_codecs; i++) {
 		struct snd_soc_dai *dai = rtd->codec_dais[i];
 
@@ -81,6 +127,12 @@ static int apq8016_sbc_dai_init(struct snd_soc_pcm_runtime *rtd)
 			dev_warn(card->dev, "Failed to set mclk: %d\n", rval);
 			return rval;
 		}
+		rval = snd_soc_codec_set_jack(codec, &pdata->jack,
+					      &pdata->mbhc_data);
+		if (rval != 0 && rval != -ENOTSUPP) {
+			dev_warn(card->dev, "Failed to set jack: %d\n", rval);
+			return rval;
+		}
 	}
 
 	return 0;
-- 
2.9.3

Re: [PATCH v1 2/6] ASoC: codecs: msm8916-analog: fix DIG_CLK_CTL_RXD3_CLK_EN define

[Mark Brown]

[-- Attachment #1: Type: text/plain, Size: 856 bytes --]

On Wed, Jul 26, 2017 at 02:35:08AM +0200, srinivas.kandagatla@linaro.org wrote:
> From: Damien Riegel <damien.riegel@savoirfairelinux.com>
> 
> The wrong bit is assigned to DIG_CLK_CTL_RXD3_CLK_EN, change it for the
> correct one.
> 
> Signed-off-by: Damien Riegel <damien.riegel@savoirfairelinux.com>
> Acked-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
> ---

It is *vital* that any patches you submit be signed off, please see
SubmittingPatches for details of what this means and why it is
important.  However in this case...

Please do not submit new versions of already applied patches, please
submit incremental updates to the existing code.  Modifying existing
commits creates problems for other users building on top of those
commits so it's best practice to only change pubished git commits if
absolutely essential.

[-- Attachment #2: signature.asc --]
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Re: [PATCH v1 3/6] ASoC: codecs: msm8916-wcd-analog: move codec reset to probe

[Mark Brown]

[-- Attachment #1: Type: text/plain, Size: 671 bytes --]

On Wed, Jul 26, 2017 at 02:35:09AM +0200, srinivas.kandagatla@linaro.org wrote:
> From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
> 
> This patch move the codec reset code from dai ops to codec probe, so
> that the codec is not held in reset when headset detection block is
> still active.

This means that the CODEC will no longer be held in reset (which
presumably has a power benefit or something) even if jack detection
isn't in use.  What most devices do is have things like this be
controlled via the bias level or other power management functions and
then have jack detection hold the CODEC out of the lowest power states
when it's active.

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Re: [PATCH v1 4/6] ASoC: codecs: msm8916-wcd-analog: set default micbias voltage to 1.8

[Mark Brown]

[-- Attachment #1: Type: text/plain, Size: 413 bytes --]

On Wed, Jul 26, 2017 at 02:35:10AM +0200, srinivas.kandagatla@linaro.org wrote:
> From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
> 
> This patch sets the default internal micbias voltage to 1.8v. This
> default value is required for mbhc buttons to work. Also adds dt
> bindings to allow the board level file to specify the required default
> micbias value.

What was the default previously?

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Re: [PATCH v1 5/6] ASoC: codecs: msm8916-wcd-analog: add MBHC support

[Mark Brown]

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On Wed, Jul 26, 2017 at 02:35:11AM +0200, srinivas.kandagatla@linaro.org wrote:

> +	if (wcd->hphl_jack_type_normally_open)
> +		plug_type = CDC_A_HPHL_PLUG_TYPE_NO;
> +
> +	if (wcd->gnd_jack_type_normally_open)
> +		plug_type |= CDC_A_GND_PLUG_TYPE_NO;

It'd be clearer to use |= consistently, this is just confusing as it
makes it look like there's a path where things aren't initialized.

> +	btn_result = snd_soc_read(codec, CDC_A_MBHC_RESULT_1) &
> +				  CDC_A_MBHC_RESULT_1_BTN_RESULT_MASK;
> +
> +	if (!btn_result)
> +		priv->mbhc_btn0_pressed = false;
> +
> +	snd_jack_report(priv->jack->jack, 0);

This checks to see if the read worked, uses it to decide if it should
clear the button pressed flag but unconditionally reports that the
button is not pressed.  It also discards the read error if there was one
without reporting that.  This needs cleanup.

> +	btn_result = snd_soc_read(codec, CDC_A_MBHC_RESULT_1) &
> +				  CDC_A_MBHC_RESULT_1_BTN_RESULT_MASK;
> +
> +	switch (btn_result) {
> +	case 0xf:
> +		snd_jack_report(priv->jack->jack, SND_JACK_BTN_4);
> +		break;
> +	case 0x7:
> +		snd_jack_report(priv->jack->jack, SND_JACK_BTN_3);
> +		break;
> +	case 0x3:
> +		snd_jack_report(priv->jack->jack, SND_JACK_BTN_2);
> +		break;
> +	case 0x1:
> +		snd_jack_report(priv->jack->jack, SND_JACK_BTN_1);
> +		break;
> +	case 0:
> +		priv->mbhc_btn0_pressed = true;
> +		snd_jack_report(priv->jack->jack, SND_JACK_BTN_0);
> +		break;
> +	}

Here we silently ignore any value we get back from the chip that we
didn't expect and all read errors.

> +struct msm8916_wcd_mbhc_data {
> +	/* Voltage threshold when internal current source of 100uA is used */
> +	int vref_btn_cs[MBHC_MAX_BUTTONS];
> +	/* Voltage threshold when microphone bias is ON */
> +	int vref_btn_micb[MBHC_MAX_BUTTONS];
> +};

I'd expect to see some mechanism for configuring the threasholds via DT,
not all vendors use the same specs for resistive buttons.

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Re: [PATCH v1 4/6] ASoC: codecs: msm8916-wcd-analog: set default micbias voltage to 1.8

[Srinivas Kandagatla]

On 28/07/17 14:40, Mark Brown wrote:
> On Wed, Jul 26, 2017 at 02:35:10AM +0200, srinivas.kandagatla@linaro.org wrote:
>> From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
>>
>> This patch sets the default internal micbias voltage to 1.8v. This
>> default value is required for mbhc buttons to work. Also adds dt
>> bindings to allow the board level file to specify the required default
>> micbias value.
> 
> What was the default previously?
> 
This was set to 2.7v previously for special headsets which have high 
impedance.

Re: [PATCH v1 4/6] ASoC: codecs: msm8916-wcd-analog: set default micbias voltage to 1.8

[Mark Brown]

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On Fri, Jul 28, 2017 at 02:54:59PM +0100, Srinivas Kandagatla wrote:
> On 28/07/17 14:40, Mark Brown wrote:
> > On Wed, Jul 26, 2017 at 02:35:10AM +0200, srinivas.kandagatla@linaro.org wrote:
> > > From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>

> > > This patch sets the default internal micbias voltage to 1.8v. This
> > > default value is required for mbhc buttons to work. Also adds dt
> > > bindings to allow the board level file to specify the required default
> > > micbias value.

> > What was the default previously?

> This was set to 2.7v previously for special headsets which have high
> impedance.

So obviously this will break existing users.  That's not OK.  

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Re: [PATCH v1 3/6] ASoC: codecs: msm8916-wcd-analog: move codec reset to probe

[Srinivas Kandagatla]

On 28/07/17 14:40, Mark Brown wrote:
> On Wed, Jul 26, 2017 at 02:35:09AM +0200, srinivas.kandagatla@linaro.org wrote:
>> From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
>>
>> This patch move the codec reset code from dai ops to codec probe, so
>> that the codec is not held in reset when headset detection block is
>> still active.
> 
> This means that the CODEC will no longer be held in reset (which
> presumably has a power benefit or something) even if jack detection
> isn't in use.  What most devices do is have things like this be
> controlled via the bias level or other power management functions and
> then have jack detection hold the CODEC out of the lowest power states
> when it's active.

This chip has two power sources for MBHC logic, one from mic bias which 
is used when we have active audio usecase, and other from internal 
current source which is for low-power state when no audio use case is 
active.

By default with the existing code uses internal current source which 
puts chip in low power state.


> 

Re: [PATCH v1 5/6] ASoC: codecs: msm8916-wcd-analog: add MBHC support

[Srinivas Kandagatla]

On 28/07/17 14:51, Mark Brown wrote:
> On Wed, Jul 26, 2017 at 02:35:11AM +0200, srinivas.kandagatla@linaro.org wrote:
> 
>> +	if (wcd->hphl_jack_type_normally_open)
>> +		plug_type = CDC_A_HPHL_PLUG_TYPE_NO;
>> +
>> +	if (wcd->gnd_jack_type_normally_open)
>> +		plug_type |= CDC_A_GND_PLUG_TYPE_NO;
> 
> It'd be clearer to use |= consistently, this is just confusing as it
> makes it look like there's a path where things aren't initialized.

Yep, I will fix this in next version.
> 
>> +	btn_result = snd_soc_read(codec, CDC_A_MBHC_RESULT_1) &
>> +				  CDC_A_MBHC_RESULT_1_BTN_RESULT_MASK;
>> +
>> +	if (!btn_result)
>> +		priv->mbhc_btn0_pressed = false;
>> +
>> +	snd_jack_report(priv->jack->jack, 0);
> 
> This checks to see if the read worked, uses it to decide if it should
> clear the button pressed flag but unconditionally reports that the
> button is not pressed.  It also discards the read error if there was one
> without reporting that.  This needs cleanup.
Okay, will clean this part in next version.
> 
>> +	btn_result = snd_soc_read(codec, CDC_A_MBHC_RESULT_1) &
>> +				  CDC_A_MBHC_RESULT_1_BTN_RESULT_MASK;
>> +
>> +	switch (btn_result) {
>> +	case 0xf:
>> +		snd_jack_report(priv->jack->jack, SND_JACK_BTN_4);
>> +		break;
>> +	case 0x7:
>> +		snd_jack_report(priv->jack->jack, SND_JACK_BTN_3);
>> +		break;
>> +	case 0x3:
>> +		snd_jack_report(priv->jack->jack, SND_JACK_BTN_2);
>> +		break;
>> +	case 0x1:
>> +		snd_jack_report(priv->jack->jack, SND_JACK_BTN_1);
>> +		break;
>> +	case 0:
>> +		priv->mbhc_btn0_pressed = true;
>> +		snd_jack_report(priv->jack->jack, SND_JACK_BTN_0);
>> +		break;
>> +	}
> 
> Here we silently ignore any value we get back from the chip that we
> didn't expect and all read errors.

I would not expect anyother values if the vrefs are programmed 
correctly, however i will add a error message in default case to notify 
this to user.

> 
>> +struct msm8916_wcd_mbhc_data {
>> +	/* Voltage threshold when internal current source of 100uA is used */
>> +	int vref_btn_cs[MBHC_MAX_BUTTONS];
>> +	/* Voltage threshold when microphone bias is ON */
>> +	int vref_btn_micb[MBHC_MAX_BUTTONS];
>> +};
> 
> I'd expect to see some mechanism for configuring the threasholds via DT,
> not all vendors use the same specs for resistive buttons.

Yep makes sense, I will do this in next version.



> 

Re: [PATCH v1 4/6] ASoC: codecs: msm8916-wcd-analog: set default micbias voltage to 1.8

[Srinivas Kandagatla]

On 28/07/17 15:01, Mark Brown wrote:
> On Fri, Jul 28, 2017 at 02:54:59PM +0100, Srinivas Kandagatla wrote:
>> On 28/07/17 14:40, Mark Brown wrote:
>>> On Wed, Jul 26, 2017 at 02:35:10AM +0200, srinivas.kandagatla@linaro.org wrote:
>>>> From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
> 
>>>> This patch sets the default internal micbias voltage to 1.8v. This
>>>> default value is required for mbhc buttons to work. Also adds dt
>>>> bindings to allow the board level file to specify the required default
>>>> micbias value.
> 
>>> What was the default previously?
> 
>> This was set to 2.7v previously for special headsets which have high
>> impedance.
> 
> So obviously this will break existing users.  That's not OK.

This would not break any exiting users, as this part is applicable for 
only headset detect usecase. I will try to address this in ("PATCH 5/6 
ASoC: codecs: msm8916-wcd-analog: add MBHC support") patch.

The default voltage for most common usecase should be set to 1.8v anyway.

Re: [PATCH v1 4/6] ASoC: codecs: msm8916-wcd-analog: set default micbias voltage to 1.8

[Mark Brown]

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On Fri, Jul 28, 2017 at 03:45:08PM +0100, Srinivas Kandagatla wrote:
> On 28/07/17 15:01, Mark Brown wrote:
> > On Fri, Jul 28, 2017 at 02:54:59PM +0100, Srinivas Kandagatla wrote:

> > > This was set to 2.7v previously for special headsets which have high
> > > impedance.

> > So obviously this will break existing users.  That's not OK.

> This would not break any exiting users, as this part is applicable for only
> headset detect usecase. I will try to address this in ("PATCH 5/6 ASoC:
> codecs: msm8916-wcd-analog: add MBHC support") patch.

> The default voltage for most common usecase should be set to 1.8v anyway.

Just leave it at the hardware default like we do for everything else in
ASoC.  

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Re: [PATCH v1 4/6] ASoC: codecs: msm8916-wcd-analog: set default micbias voltage to 1.8

[Srinivas Kandagatla]

On 31/07/17 11:07, Mark Brown wrote:
> On Fri, Jul 28, 2017 at 03:45:08PM +0100, Srinivas Kandagatla wrote:
>> On 28/07/17 15:01, Mark Brown wrote:
>>> On Fri, Jul 28, 2017 at 02:54:59PM +0100, Srinivas Kandagatla wrote:
> 
>>>> This was set to 2.7v previously for special headsets which have high
>>>> impedance.
> 
>>> So obviously this will break existing users.  That's not OK.
> 
>> This would not break any exiting users, as this part is applicable for only
>> headset detect usecase. I will try to address this in ("PATCH 5/6 ASoC:
>> codecs: msm8916-wcd-analog: add MBHC support") patch.
> 
>> The default voltage for most common usecase should be set to 1.8v anyway.
> 
> Just leave it at the hardware default like we do for everything else in
> ASoC.
Yep, makes sense, the hw default is at 1.8v.

thanks,
srini
> 

Applied "ASoC: jack: fix snd_soc_codec_set_jack return error" to the asoc tree

[Mark Brown]

The patch

   ASoC: jack: fix snd_soc_codec_set_jack return error

has been applied to the asoc tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 77a4525bc282b7072ebda5d6f6925ca6d604a16f Mon Sep 17 00:00:00 2001
From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Date: Wed, 26 Jul 2017 02:35:07 +0200
Subject: [PATCH] ASoC: jack: fix snd_soc_codec_set_jack return error

This patch changes the error code returned by snd_soc_codec_set_jack()
from -EINVAL to -ENOTSUPP. The reason to do this is to make the caller
aware that the underlying codec does not support this callback. This can
make the caller write the code to handle this case properly.
Other reason is that -EINVAL is not the correct error to return in this
case anyway.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/soc-jack.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/soc/soc-jack.c b/sound/soc/soc-jack.c
index 7daf21fee355..42ca9f19843b 100644
--- a/sound/soc/soc-jack.c
+++ b/sound/soc/soc-jack.c
@@ -36,7 +36,7 @@ int snd_soc_codec_set_jack(struct snd_soc_codec *codec,
 	if (codec->driver->set_jack)
 		return codec->driver->set_jack(codec, jack, data);
 	else
-		return -EINVAL;
+		return -ENOTSUPP;
 }
 EXPORT_SYMBOL_GPL(snd_soc_codec_set_jack);
 
-- 
2.13.2

Applied "ASoC: codecs: msm8916-wcd-analog: move codec reset to probe" to the asoc tree

[Mark Brown]

The patch

   ASoC: codecs: msm8916-wcd-analog: move codec reset to probe

has been applied to the asoc tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

>From 52981e29eedf6e90ee381c2c1a64be1848d3353e Mon Sep 17 00:00:00 2001
From: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Date: Wed, 9 Aug 2017 18:49:23 +0200
Subject: [PATCH] ASoC: codecs: msm8916-wcd-analog: move codec reset to probe

This patch move the codec reset code from dai ops to codec probe, so
that the codec is not held in reset when headset detection block is
still active.

Without this patch the codec block will be in reset as long as its not
actively used, which means headset events will not be functional if the
codec dai is not actively used. Point to note is that the headset
detection blocks will work in low power when there is no active audio
usecase and switch to micbias source when audio usecase is active.

Existing dapms should put the codec in low power state anyway when there
is no audio usecase.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
---
 sound/soc/codecs/msm8916-wcd-analog.c | 30 ++++++------------------------
 1 file changed, 6 insertions(+), 24 deletions(-)

diff --git a/sound/soc/codecs/msm8916-wcd-analog.c b/sound/soc/codecs/msm8916-wcd-analog.c
index a78802920c3c..f9a74ff2ce99 100644
--- a/sound/soc/codecs/msm8916-wcd-analog.c
+++ b/sound/soc/codecs/msm8916-wcd-analog.c
@@ -536,6 +536,9 @@ static int pm8916_wcd_analog_probe(struct snd_soc_codec *codec)
 		snd_soc_write(codec, wcd_reg_defaults_2_0[reg].reg,
 			      wcd_reg_defaults_2_0[reg].def);
 
+	snd_soc_update_bits(codec, CDC_D_CDC_RST_CTL,
+			    RST_CTL_DIG_SW_RST_N_MASK,
+			    RST_CTL_DIG_SW_RST_N_REMOVE_RESET);
 	return 0;
 }
 
@@ -543,6 +546,9 @@ static int pm8916_wcd_analog_remove(struct snd_soc_codec *codec)
 {
 	struct pm8916_wcd_analog_priv *priv = dev_get_drvdata(codec->dev);
 
+	snd_soc_update_bits(codec, CDC_D_CDC_RST_CTL,
+			    RST_CTL_DIG_SW_RST_N_MASK, 0);
+
 	return regulator_bulk_disable(ARRAY_SIZE(priv->supplies),
 				      priv->supplies);
 }
@@ -736,28 +742,6 @@ static struct regmap *pm8916_get_regmap(struct device *dev)
 	return dev_get_regmap(dev->parent, NULL);
 }
 
-static int pm8916_wcd_analog_startup(struct snd_pcm_substream *substream,
-				      struct snd_soc_dai *dai)
-{
-	snd_soc_update_bits(dai->codec, CDC_D_CDC_RST_CTL,
-			    RST_CTL_DIG_SW_RST_N_MASK,
-			    RST_CTL_DIG_SW_RST_N_REMOVE_RESET);
-
-	return 0;
-}
-
-static void pm8916_wcd_analog_shutdown(struct snd_pcm_substream *substream,
-					 struct snd_soc_dai *dai)
-{
-	snd_soc_update_bits(dai->codec, CDC_D_CDC_RST_CTL,
-			    RST_CTL_DIG_SW_RST_N_MASK, 0);
-}
-
-static struct snd_soc_dai_ops pm8916_wcd_analog_dai_ops = {
-	.startup = pm8916_wcd_analog_startup,
-	.shutdown = pm8916_wcd_analog_shutdown,
-};
-
 static struct snd_soc_dai_driver pm8916_wcd_analog_dai[] = {
 	[0] = {
 	       .name = "pm8916_wcd_analog_pdm_rx",
@@ -769,7 +753,6 @@ static struct snd_soc_dai_driver pm8916_wcd_analog_dai[] = {
 			    .channels_min = 1,
 			    .channels_max = 3,
 			    },
-	       .ops = &pm8916_wcd_analog_dai_ops,
 	       },
 	[1] = {
 	       .name = "pm8916_wcd_analog_pdm_tx",
@@ -781,7 +764,6 @@ static struct snd_soc_dai_driver pm8916_wcd_analog_dai[] = {
 			   .channels_min = 1,
 			   .channels_max = 4,
 			   },
-	       .ops = &pm8916_wcd_analog_dai_ops,
 	       },
 };
 
-- 
2.13.2