Alsa-Devel Archive on lore.kernel.org
 help / color / Atom feed
From: Curtis Malainey <cujomalainey@chromium.org>
To: alsa-devel@alsa-project.org
Cc: Oder Chiou <oder_chiou@realtek.com>,
	Takashi Iwai <tiwai@suse.com>,
	Liam Girdwood <lgirdwood@gmail.com>,
	Ben Zhang <benzh@chromium.org>, Mark Brown <broonie@kernel.org>,
	Bard Liao <bardliao@realtek.com>,
	Curtis Malainey <cujomalainey@chromium.org>
Subject: [alsa-devel] [PATCH v3 07/11] ASoC: rt5677: Disable irq at suspend
Date: Tue,  5 Nov 2019 17:13:32 -0800
Message-ID: <20191106011335.223061-8-cujomalainey@chromium.org> (raw)
In-Reply-To: <20191106011335.223061-1-cujomalainey@chromium.org>

From: Ben Zhang <benzh@chromium.org>

The irq is disabled at suspend to avoid running the threaded irq
handler after the codec has been powered off. At resume, codec irq is
re-enabled and the interrupt status register is checked to see if
headphone has been pluggnd/unplugged while the device is suspended.

There is still a chance that the headphone gets enabled or disabled
after the codec is suspended. disable_irq syncs the threaded irq
handler, but soc-jack's threaded irq handler schedules a delayed
work to poll gpios (for debounce). This is still OK. The codec won't
be powered back on again because all audio paths have been suspended,
and there are no force enabled supply widgets (MICBIAS1 is disabled).
The gpio status read after codec power off could be wrong, so the
gpio values are checked again after resume.

Signed-off-by: Ben Zhang <benzh@chromium.org>
Signed-off-by: Curtis Malainey <cujomalainey@chromium.org>
---
 sound/soc/codecs/rt5677.c | 46 +++++++++++++++++++++++++++++++++++++++
 sound/soc/codecs/rt5677.h |  2 ++
 2 files changed, 48 insertions(+)

diff --git a/sound/soc/codecs/rt5677.c b/sound/soc/codecs/rt5677.c
index eb55d6b9d0c1..14f04db8e5e7 100644
--- a/sound/soc/codecs/rt5677.c
+++ b/sound/soc/codecs/rt5677.c
@@ -4949,6 +4949,11 @@ static int rt5677_suspend(struct snd_soc_component *component)
 {
 	struct rt5677_priv *rt5677 = snd_soc_component_get_drvdata(component);
 
+	if (rt5677->irq) {
+		cancel_delayed_work_sync(&rt5677->resume_irq_check);
+		disable_irq(rt5677->irq);
+	}
+
 	if (!rt5677->dsp_vad_en) {
 		regcache_cache_only(rt5677->regmap, true);
 		regcache_mark_dirty(rt5677->regmap);
@@ -4977,6 +4982,11 @@ static int rt5677_resume(struct snd_soc_component *component)
 		regcache_sync(rt5677->regmap);
 	}
 
+	if (rt5677->irq) {
+		enable_irq(rt5677->irq);
+		schedule_delayed_work(&rt5677->resume_irq_check, 0);
+	}
+
 	return 0;
 }
 #else
@@ -5375,6 +5385,39 @@ static irqreturn_t rt5677_irq(int unused, void *data)
 		return IRQ_NONE;
 }
 
+static void rt5677_resume_irq_check(struct work_struct *work)
+{
+	int i, virq;
+	struct rt5677_priv *rt5677 =
+		container_of(work, struct rt5677_priv, resume_irq_check.work);
+
+	/* This is needed to check and clear the interrupt status register
+	 * at resume. If the headset is plugged/unplugged when the device is
+	 * fully suspended, there won't be a rising edge at resume to trigger
+	 * the interrupt. Without this, we miss the next unplug/plug event.
+	 */
+	rt5677_irq(0, rt5677);
+
+	/* Call all enabled jack detect irq handlers again. This is needed in
+	 * addition to the above check for a corner case caused by jack gpio
+	 * debounce. After codec irq is disabled at suspend, the delayed work
+	 * scheduled by soc-jack may run and read wrong jack gpio values, since
+	 * the regmap is in cache only mode. At resume, there is no irq because
+	 * rt5677_irq has already ran and cleared the irq status at suspend.
+	 * Without this explicit check, unplug the headset right after suspend
+	 * starts, then after resume the headset is still shown as plugged in.
+	 */
+	mutex_lock(&rt5677->irq_lock);
+	for (i = 0; i < RT5677_IRQ_NUM; i++) {
+		if (rt5677->irq_en & rt5677_irq_descs[i].enable_mask) {
+			virq = irq_find_mapping(rt5677->domain, i);
+			if (virq)
+				handle_nested_irq(virq);
+		}
+	}
+	mutex_unlock(&rt5677->irq_lock);
+}
+
 static void rt5677_irq_bus_lock(struct irq_data *data)
 {
 	struct rt5677_priv *rt5677 = irq_data_get_irq_chip_data(data);
@@ -5450,6 +5493,7 @@ static int rt5677_init_irq(struct i2c_client *i2c)
 	}
 
 	mutex_init(&rt5677->irq_lock);
+	INIT_DELAYED_WORK(&rt5677->resume_irq_check, rt5677_resume_irq_check);
 
 	/*
 	 * Select RC as the debounce clock so that GPIO works even when
@@ -5495,6 +5539,8 @@ static int rt5677_init_irq(struct i2c_client *i2c)
 	if (ret)
 		dev_err(&i2c->dev, "Failed to request IRQ: %d\n", ret);
 
+	rt5677->irq = i2c->irq;
+
 	return ret;
 }
 
diff --git a/sound/soc/codecs/rt5677.h b/sound/soc/codecs/rt5677.h
index 046ed2ee8e31..f8ada967fdbc 100644
--- a/sound/soc/codecs/rt5677.h
+++ b/sound/soc/codecs/rt5677.h
@@ -1856,6 +1856,8 @@ struct rt5677_priv {
 	struct irq_domain *domain;
 	struct mutex irq_lock;
 	unsigned int irq_en;
+	struct delayed_work resume_irq_check;
+	int irq;
 
 	int (*set_dsp_vad)(struct snd_soc_component *component, bool on);
 };
-- 
2.24.0.rc1.363.gb1bccd3e3d-goog

_______________________________________________
Alsa-devel mailing list
Alsa-devel@alsa-project.org
https://mailman.alsa-project.org/mailman/listinfo/alsa-devel

  parent reply index

Thread overview: 13+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-06  1:13 [alsa-devel] [PATCH v3 00/11] Add Samus Hotwording for RT5677 Curtis Malainey
2019-11-06  1:13 ` [alsa-devel] [PATCH v3 01/11] ASoC: rt5677: Load firmware via SPI using delayed work Curtis Malainey
2019-11-06  1:17   ` Curtis Malainey
2019-11-06  1:13 ` [alsa-devel] [PATCH v3 02/11] ASoC: bdw-rt5677: Add a DAI link for rt5677 SPI PCM device Curtis Malainey
2019-11-06  1:13 ` [alsa-devel] [PATCH v3 03/11] ASoC: rt5677: Enable jack detect while DSP is running Curtis Malainey
2019-11-06  1:13 ` [alsa-devel] [PATCH v3 04/11] ASoC: rt5677: Add DAPM audio path for hotword stream Curtis Malainey
2019-11-06  1:13 ` [alsa-devel] [PATCH v3 05/11] ASoC: rt5677: Mark reg RT5677_PWR_ANLG2 as volatile Curtis Malainey
2019-11-06  1:13 ` [alsa-devel] [PATCH v3 06/11] ASoC: rt5677: Stop and restart DSP over suspend/resume Curtis Malainey
2019-11-06  1:13 ` Curtis Malainey [this message]
2019-11-06  1:13 ` [alsa-devel] [PATCH v3 08/11] ASoC: rt5677: Allow VAD to be shut on/off at all times Curtis Malainey
2019-11-06  1:13 ` [alsa-devel] [PATCH v3 09/11] ASoC: bdw-rt5677: Turn on MCLK1 for DSP via DAPM Curtis Malainey
2019-11-06  1:13 ` [alsa-devel] [PATCH v3 10/11] ASoC: rt5677: Set ADC clock to use PLL and enable ASRC Curtis Malainey
2019-11-06  1:13 ` [alsa-devel] [PATCH v3 11/11] ASoC: rt5677: Wait for DSP to boot before loading firmware Curtis Malainey

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20191106011335.223061-8-cujomalainey@chromium.org \
    --to=cujomalainey@chromium.org \
    --cc=alsa-devel@alsa-project.org \
    --cc=bardliao@realtek.com \
    --cc=benzh@chromium.org \
    --cc=broonie@kernel.org \
    --cc=lgirdwood@gmail.com \
    --cc=oder_chiou@realtek.com \
    --cc=tiwai@suse.com \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

Alsa-Devel Archive on lore.kernel.org

Archives are clonable:
	git clone --mirror https://lore.kernel.org/alsa-devel/0 alsa-devel/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 alsa-devel alsa-devel/ https://lore.kernel.org/alsa-devel \
		alsa-devel@alsa-project.org
	public-inbox-index alsa-devel

Example config snippet for mirrors

Newsgroup available over NNTP:
	nntp://nntp.lore.kernel.org/org.alsa-project.alsa-devel


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git