linux-kernel - [PATCH v2] ASoC: codecs: msm8916-wcd-analog: configure micbias in mbhc setup

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Date:   Tue,  3 Oct 2017 09:27:35 -0400
From:   Damien Riegel <damien.riegel@...oirfairelinux.com>
To:     alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Cc:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        kernel@...oirfairelinux.com,
        Damien Riegel <damien.riegel@...oirfairelinux.com>
Subject: [PATCH v2] ASoC: codecs: msm8916-wcd-analog: configure micbias in mbhc setup

The very first time a headset is plugged in, detection is unreliable
because bias hasn't been configured yet, it's done once a mechanical
insertion interrupt has been triggered, so following insertions (and
thus detections) are not affected.

To fix the very first detection, the bias must also be configured in the
function that setup the MBHC. Move pm8916_wcd_setup_mbhc after
pm8916_mbhc_configure_bias to avoid a forward declaration.

Signed-off-by: Damien Riegel <damien.riegel@...oirfairelinux.com>
---
Changes in v2:
 - squash the two patches in one patch only

 sound/soc/codecs/msm8916-wcd-analog.c | 94 +++++++++++++++++++----------------
 1 file changed, 50 insertions(+), 44 deletions(-)

diff --git a/sound/soc/codecs/msm8916-wcd-analog.c b/sound/soc/codecs/msm8916-wcd-analog.c
index f562f2d86907..71494e9dbdcb 100644
--- a/sound/soc/codecs/msm8916-wcd-analog.c
+++ b/sound/soc/codecs/msm8916-wcd-analog.c
@@ -443,50 +443,6 @@ 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;
-	u32 int_en_mask;
-
-	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);
-
-	int_en_mask = MBHC_SWITCH_INT;
-	if (wcd->mbhc_btn_enabled)
-		int_en_mask |= MBHC_BUTTON_PRESS_DET | MBHC_BUTTON_RELEASE_DET;
-
-	snd_soc_update_bits(codec, CDC_D_INT_EN_CLR, int_en_mask, 0);
-	snd_soc_update_bits(codec, CDC_D_INT_EN_SET, int_en_mask, int_en_mask);
-	wcd->mbhc_btn0_released = false;
-	wcd->detect_accessory_type = true;
-}
-
 static int pm8916_mbhc_configure_bias(struct pm8916_wcd_analog_priv *priv,
 				      bool micbias2_enabled)
 {
@@ -534,6 +490,56 @@ static int pm8916_mbhc_configure_bias(struct pm8916_wcd_analog_priv *priv,
 	return 0;
 }
 
+static void pm8916_wcd_setup_mbhc(struct pm8916_wcd_analog_priv *wcd)
+{
+	struct snd_soc_codec *codec = wcd->codec;
+	bool micbias_enabled = false;
+	u32 plug_type = 0;
+	u32 int_en_mask;
+
+	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);
+
+	if (snd_soc_read(codec, CDC_A_MICB_2_EN) & CDC_A_MICB_2_EN_ENABLE)
+		micbias_enabled = true;
+
+	pm8916_mbhc_configure_bias(wcd, micbias_enabled);
+
+	int_en_mask = MBHC_SWITCH_INT;
+	if (wcd->mbhc_btn_enabled)
+		int_en_mask |= MBHC_BUTTON_PRESS_DET | MBHC_BUTTON_RELEASE_DET;
+
+	snd_soc_update_bits(codec, CDC_D_INT_EN_CLR, int_en_mask, 0);
+	snd_soc_update_bits(codec, CDC_D_INT_EN_SET, int_en_mask, int_en_mask);
+	wcd->mbhc_btn0_released = false;
+	wcd->detect_accessory_type = true;
+}
+
 static int pm8916_wcd_analog_enable_micbias_int2(struct
 						  snd_soc_dapm_widget
 						  *w, struct snd_kcontrol
-- 
2.14.1