Update MBHC driver to support special headset such as apple
and huwawei headsets.
Changes Since V1:
-- Fix typo errors.
Signed-off-by: Srinivasa Rao Mandadapu <srivasam@xxxxxxxxxxxxxx>
Co-developed-by: Venkata Prasad Potturu <potturu@xxxxxxxxxxxxxx>
Signed-off-by: Venkata Prasad Potturu <potturu@xxxxxxxxxxxxxx>
Reviewed-by: Srinivas Kandagatla <srinivas.kandagatla@xxxxxxxxxx>
---
sound/soc/codecs/wcd-mbhc-v2.c | 75 +++++++++++++++++++++++++++++++++++++++---
1 file changed, 71 insertions(+), 4 deletions(-)
diff --git a/sound/soc/codecs/wcd-mbhc-v2.c b/sound/soc/codecs/wcd-mbhc-v2.c
index 405128c..d6545e4 100644
--- a/sound/soc/codecs/wcd-mbhc-v2.c
+++ b/sound/soc/codecs/wcd-mbhc-v2.c
@@ -1022,6 +1022,56 @@ static int wcd_mbhc_get_plug_from_adc(struct wcd_mbhc *mbhc, int adc_result)
return plug_type;
}
+static int wcd_mbhc_get_spl_hs_thres(struct wcd_mbhc *mbhc)
+{
+ int hs_threshold, micbias_mv;
+
+ micbias_mv = wcd_mbhc_get_micbias(mbhc);
+ if (mbhc->cfg->hs_thr && mbhc->cfg->micb_mv != WCD_MBHC_ADC_MICBIAS_MV) {
+ if (mbhc->cfg->micb_mv == micbias_mv)
+ hs_threshold = mbhc->cfg->hs_thr;
+ else
+ hs_threshold = (mbhc->cfg->hs_thr * micbias_mv) / mbhc->cfg->micb_mv;
+ } else {
+ hs_threshold = ((WCD_MBHC_ADC_HS_THRESHOLD_MV * micbias_mv) /
+ WCD_MBHC_ADC_MICBIAS_MV);
+ }
+ return hs_threshold;
+}
+
+static bool wcd_mbhc_check_for_spl_headset(struct wcd_mbhc *mbhc)
+{
+ bool is_spl_hs = false;
+ int output_mv, hs_threshold, hph_threshold;
+
+ if (!mbhc->mbhc_cb->mbhc_micb_ctrl_thr_mic)
+ return false;
+
+ /* Bump up MIC_BIAS2 to 2.7V */
+ mbhc->mbhc_cb->mbhc_micb_ctrl_thr_mic(mbhc->component, MIC_BIAS_2, true);
+ usleep_range(10000, 10100);
+
+ output_mv = wcd_measure_adc_once(mbhc, MUX_CTL_IN2P);
+ hs_threshold = wcd_mbhc_get_spl_hs_thres(mbhc);
+ hph_threshold = wcd_mbhc_adc_get_hph_thres(mbhc);
+
+ if (output_mv > hs_threshold || output_mv < hph_threshold) {
+ if (mbhc->force_linein == true)
+ is_spl_hs = false;
+ } else {
+ is_spl_hs = true;
+ }
+
+ /* Back MIC_BIAS2 to 1.8v if the type is not special headset */
+ if (!is_spl_hs) {
+ mbhc->mbhc_cb->mbhc_micb_ctrl_thr_mic(mbhc->component, MIC_BIAS_2, false);
+ /* Add 10ms delay for micbias to settle */
+ usleep_range(10000, 10100);
+ }
+
+ return is_spl_hs;
+}
+
static void wcd_correct_swch_plug(struct work_struct *work)
{
struct wcd_mbhc *mbhc;
@@ -1029,12 +1079,14 @@ static void wcd_correct_swch_plug(struct work_struct *work)
enum wcd_mbhc_plug_type plug_type = MBHC_PLUG_TYPE_INVALID;
unsigned long timeout;
int pt_gnd_mic_swap_cnt = 0;
- int output_mv, cross_conn, hs_threshold, try = 0;
+ int output_mv, cross_conn, hs_threshold, try = 0, micbias_mv;
+ bool is_spl_hs = false;
bool is_pa_on;
mbhc = container_of(work, struct wcd_mbhc, correct_plug_swch);
component = mbhc->component;
+ micbias_mv = wcd_mbhc_get_micbias(mbhc);
hs_threshold = wcd_mbhc_adc_get_hs_thres(mbhc);
/* Mask ADC COMPLETE interrupt */
@@ -1097,6 +1149,16 @@ static void wcd_correct_swch_plug(struct work_struct *work)
plug_type = wcd_mbhc_get_plug_from_adc(mbhc, output_mv);
is_pa_on = wcd_mbhc_read_field(mbhc, WCD_MBHC_HPH_PA_EN);
+ if ((output_mv > hs_threshold) && (!is_spl_hs)) {
+ is_spl_hs = wcd_mbhc_check_for_spl_headset(mbhc);
+ output_mv = wcd_measure_adc_once(mbhc, MUX_CTL_IN2P);
+
+ if (is_spl_hs) {
+ hs_threshold = (hs_threshold * wcd_mbhc_get_micbias(mbhc)) /
+ micbias_mv;
+ }
+ }
+
if ((output_mv <= hs_threshold) && !is_pa_on) {
/* Check for cross connection*/
cross_conn = wcd_check_cross_conn(mbhc);
@@ -1122,14 +1184,19 @@ static void wcd_correct_swch_plug(struct work_struct *work)
}
}
- if (output_mv > hs_threshold) /* cable is extension cable */
+ /* cable is extension cable */
+ if (output_mv > hs_threshold || mbhc->force_linein == true)
plug_type = MBHC_PLUG_TYPE_HIGH_HPH;
}
wcd_mbhc_bcs_enable(mbhc, plug_type, true);
- if (plug_type == MBHC_PLUG_TYPE_HIGH_HPH)
- wcd_mbhc_write_field(mbhc, WCD_MBHC_ELECT_ISRC_EN, 1);
+ if (plug_type == MBHC_PLUG_TYPE_HIGH_HPH) {
+ if (is_spl_hs)
+ plug_type = MBHC_PLUG_TYPE_HEADSET;
+ else
+ wcd_mbhc_write_field(mbhc, WCD_MBHC_ELECT_ISRC_EN, 1);
+ }
wcd_mbhc_write_field(mbhc, WCD_MBHC_ADC_MODE, 0);
wcd_mbhc_write_field(mbhc, WCD_MBHC_ADC_EN, 0);
--
Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc.,
is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.
