RE: [PATCH] ASoC: da7219: Fix pole orientation detection on OMTP headsets when playing music

Would you please provide me the related error messages when hung task crashes in da7219_aad_irq_thread()? BTW, "gnd_switch_delay = 256" is an unusual use case of the longer jack detection latency.

-----Original Message----- From: Guenter Roeck groeck7@gmail.com On Behalf Of Guenter Roeck Sent: Wednesday, January 18, 2023 03:57 To: David Rau we730128@gmail.com Cc: perex@perex.cz; lgirdwood@gmail.com; broonie@kernel.org; tiwai@suse.com; support.opensource@diasemi.com; alsa-devel@alsa-project.org; linux-kernel@vger.kernel.org; David Rau david.rau.zg@renesas.com Subject: Re: [PATCH] ASoC: da7219: Fix pole orientation detection on OMTP headsets when playing music

On Mon, Nov 21, 2022 at 05:07:44AM +0000, David Rau wrote:

The OMTP pin define headsets can be mis-detected as line out instead of OMTP, causing obvious issues with audio quality. This patch is to put increased resistances within the device at a suitable point.

To solve this issue better, the new mechanism setup ground switches with conditional delay control and these allow for more stabile detection process to operate as intended. This conditional delay control will not impact the hardware process but use extra system resource.

This commit improves control of ground switches in the AAD logic.

Signed-off-by: David Rau david.rau.zg@renesas.com

sound/soc/codecs/da7219-aad.c | 42 ++++++++++++++++++++++++++++++----- sound/soc/codecs/da7219-aad.h | 1 + 2 files changed, 37 insertions(+), 6 deletions(-)

diff --git a/sound/soc/codecs/da7219-aad.c b/sound/soc/codecs/da7219-aad.c index bba73c44c219..08200ec259f9 100644 --- a/sound/soc/codecs/da7219-aad.c +++ b/sound/soc/codecs/da7219-aad.c @@ -352,9 +352,14 @@ static irqreturn_t da7219_aad_irq_thread(int irq, void *data) struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component); struct da7219_priv *da7219 = snd_soc_component_get_drvdata(component); u8 events[DA7219_AAD_IRQ_REG_MAX];

• u8 statusa;

• u8 statusa, srm_st; int i, report = 0, mask = 0;

• srm_st = snd_soc_component_read(component, DA7219_PLL_SRM_STS) & DA7219_PLL_SRM_STS_MCLK;

• msleep(da7219_aad->gnd_switch_delay * ((srm_st == 0x0) ? 2 : 1) -

+4);

Ever since this patch was applied to ChromeOS, we have observed hung task crashes in da7219_aad_irq_thread().

Is it really appropriate to sleep up to (256 * 2) - 4 = 508 ms in an interrupt handler ?

Thanks, Guenter

• /* Enable ground switch */
• snd_soc_component_update_bits(component, 0xFB, 0x01, 0x01);
• /* Read current IRQ events */ regmap_bulk_read(da7219->regmap, DA7219_ACCDET_IRQ_EVENT_A, events, DA7219_AAD_IRQ_REG_MAX);

@@ -454,8 +459,8 @@ 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);
  

• 	/* Disable ground switch */
  

• 	snd_soc_component_update_bits(component, 0xFB, 0x01, 0x00);
  

  } }

@@ -831,6 +836,32 @@ static void da7219_aad_handle_pdata(struct snd_soc_component *component) } }

+static void da7219_aad_handle_gnd_switch_time(struct +snd_soc_component *component) {

• struct da7219_priv *da7219 = snd_soc_component_get_drvdata(component);
• struct da7219_aad_priv *da7219_aad = da7219->aad;
• u8 jack_det;
• jack_det = snd_soc_component_read(component, DA7219_ACCDET_CONFIG_2)

• & DA7219_JACK_DETECT_RATE_MASK;
  

• switch (jack_det) {
• case 0x00:

• da7219_aad->gnd_switch_delay = 32;
  

• break;
  

• case 0x10:

• da7219_aad->gnd_switch_delay = 64;
  

• break;
  

• case 0x20:

• da7219_aad->gnd_switch_delay = 128;
  

• break;
  

• case 0x30:

• da7219_aad->gnd_switch_delay = 256;
  

• break;
  

• default:

• da7219_aad->gnd_switch_delay = 32;
  

• break;
  

• }

+}

/*

• Suspend/Resume

@@ -908,9 +939,6 @@ 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);

@@ -928,6 +956,8 @@ int da7219_aad_init(struct snd_soc_component *component) regmap_bulk_write(da7219->regmap, DA7219_ACCDET_IRQ_MASK_A, &mask, DA7219_AAD_IRQ_REG_MAX);

• da7219_aad_handle_gnd_switch_time(component);
• return 0;

} EXPORT_SYMBOL_GPL(da7219_aad_init); diff --git a/sound/soc/codecs/da7219-aad.h b/sound/soc/codecs/da7219-aad.h index f48a12012ef3..21fdf53095cc 100644 --- a/sound/soc/codecs/da7219-aad.h +++ b/sound/soc/codecs/da7219-aad.h @@ -187,6 +187,7 @@ enum da7219_aad_event_regs { struct da7219_aad_priv { struct snd_soc_component *component; int irq;

• int gnd_switch_delay;

  u8 micbias_pulse_lvl; u32 micbias_pulse_time;

-- 2.17.1