From 06f5882122e3faa183d76c4ec2c92f4c38e2c7bb Mon Sep 17 00:00:00 2001 From: Adam Thomson Date: Mon, 30 May 2022 13:22:22 +0000 Subject: ASoC: da7219: Fix pole orientation detection on certain headsets It has been recently found that certain 'active' headsets can be mis-detected as OMTP instead of CTIA, causing obvious issus with audio quality. This relates to increased resistances which negatively impacts the pole detection circuitry within the device. To counter this, ground switches on both headphone channels are available to enable/disable and these allow for the detection process to operate as intended, even with active headsets. This commit adds control of the ground switches to the AAD logic. Signed-off-by: Adam Thomson Link: https://lore.kernel.org/r/e0a627725c189dd50d6ce24571aed87fe2597395.1653916368.git.DLG-Adam.Thomson.Opensource@dm.renesas.com Signed-off-by: Mark Brown --- sound/soc/codecs/da7219-aad.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) (limited to 'sound') diff --git a/sound/soc/codecs/da7219-aad.c b/sound/soc/codecs/da7219-aad.c index 7998fdd3b378..e7d8c33e02cc 100644 --- a/sound/soc/codecs/da7219-aad.c +++ b/sound/soc/codecs/da7219-aad.c @@ -60,6 +60,9 @@ static void da7219_aad_btn_det_work(struct work_struct *work) bool micbias_up = false; int retries = 0; + /* Disable ground switch */ + snd_soc_component_update_bits(component, 0xFB, 0x01, 0x00); + /* Drive headphones/lineout */ snd_soc_component_update_bits(component, DA7219_HP_L_CTRL, DA7219_HP_L_AMP_OE_MASK, @@ -153,6 +156,9 @@ static void da7219_aad_hptest_work(struct work_struct *work) tonegen_freq_hptest = cpu_to_le16(DA7219_AAD_HPTEST_RAMP_FREQ_INT_OSC); } + /* Disable ground switch */ + snd_soc_component_update_bits(component, 0xFB, 0x01, 0x00); + /* Ensure gain ramping at fastest rate */ gain_ramp_ctrl = snd_soc_component_read(component, DA7219_GAIN_RAMP_CTRL); snd_soc_component_write(component, DA7219_GAIN_RAMP_CTRL, DA7219_GAIN_RAMP_RATE_X8); @@ -444,6 +450,9 @@ static irqreturn_t da7219_aad_irq_thread(int irq, void *data) snd_soc_dapm_disable_pin(dapm, "Mic Bias"); snd_soc_dapm_sync(dapm); + /* Enable ground switch */ + snd_soc_component_update_bits(component, 0xFB, 0x01, 0x01); + /* Cancel any pending work */ cancel_work_sync(&da7219_aad->btn_det_work); cancel_work_sync(&da7219_aad->hptest_work); @@ -899,6 +908,9 @@ int da7219_aad_init(struct snd_soc_component *component) snd_soc_component_update_bits(component, DA7219_ACCDET_CONFIG_1, DA7219_BUTTON_CONFIG_MASK, 0); + /* Enable ground switch */ + snd_soc_component_update_bits(component, 0xFB, 0x01, 0x01); + INIT_WORK(&da7219_aad->btn_det_work, da7219_aad_btn_det_work); INIT_WORK(&da7219_aad->hptest_work, da7219_aad_hptest_work); -- cgit v1.2.3