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asoc: mbhc: fix for fake ins irq

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Check for in2p clamp state in insertion irq
and ignore the interrupt if the clamp is already
set, which means the mechanical removal is about
to happen next.

Change-Id: I55691d427cf07d5b61862b6dbd39f3ec34d873e5
Signed-off-by: Karthikeyan Mani <kmani@codeaurora.org>
This commit is contained in:
Karthikeyan Mani
2018-02-01 14:07:41 -08:00
committed by Gerrit - the friendly Code Review server
parent aa9c44a396
commit dd50371847
3 changed files with 21 additions and 2 deletions
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18
asoc/codecs/wcd-mbhc-adc.c
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@@ -1,4 +1,4 @@
/* Copyright (c) 2017, The Linux Foundation. All rights reserved.
/* Copyright (c) 2017-2018, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
@@ -34,6 +34,7 @@
#define WCD_MBHC_ADC_HS_THRESHOLD_MV 1700
#define WCD_MBHC_ADC_HPH_THRESHOLD_MV 75
#define WCD_MBHC_ADC_MICBIAS_MV 1800
#define WCD_MBHC_FAKE_INS_RETRY 4
static int wcd_mbhc_get_micbias(struct wcd_mbhc *mbhc)
{
@@ -1021,6 +1022,8 @@ exit:
static irqreturn_t wcd_mbhc_adc_hs_ins_irq(int irq, void *data)
{
struct wcd_mbhc *mbhc = data;
u8 clamp_state = 0;
u8 clamp_retry = WCD_MBHC_FAKE_INS_RETRY;
pr_debug("%s: enter\n", __func__);
@@ -1035,6 +1038,19 @@ static irqreturn_t wcd_mbhc_adc_hs_ins_irq(int irq, void *data)
return IRQ_HANDLED;
}
do {
WCD_MBHC_REG_READ(WCD_MBHC_IN2P_CLAMP_STATE, clamp_state);
if (clamp_state) {
pr_debug("%s: fake insertion irq, leave\n", __func__);
return IRQ_HANDLED;
}
/*
* check clamp for 120ms but at 30ms chunks to leave
* room for other interrupts to be processed
*/
usleep_range(30000, 30100);
} while (--clamp_retry);
WCD_MBHC_RSC_LOCK(mbhc);
/*
* If current plug is headphone then there is no chance to