LKML Archive on lore.kernel.org
help / color / mirror / Atom feed
From: Richard Fitzgerald <rf@opensource.cirrus.com>
To: <broonie@kernel.org>
Cc: <alsa-devel@alsa-project.org>, <patches@opensource.cirrus.com>,
	<linux-kernel@vger.kernel.org>,
	Richard Fitzgerald <rf@opensource.cirrus.com>
Subject: [PATCH 07/12] ASoC: cs42l42: Allow time for HP/ADC to power-up after enable
Date: Tue, 10 Aug 2021 16:37:54 +0100	[thread overview]
Message-ID: <20210810153759.24333-8-rf@opensource.cirrus.com> (raw)
In-Reply-To: <20210810153759.24333-1-rf@opensource.cirrus.com>

After enabling the HP or ADC by writing the corresponding PDN=0,
it takes around 20 milliseconds for it to power up and the midrail
supply to be stable. Add this wait into a DAPM widget callback.

If HP and ADC are both powering up in a DAPM sequence, there's no
need to do the wait twice. The widget will perform one wait in the
POST_PMU if there was a PRE_PMU for one or both.

Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
---
 sound/soc/codecs/cs42l42.c | 31 +++++++++++++++++++++++++++++--
 sound/soc/codecs/cs42l42.h |  2 ++
 2 files changed, 31 insertions(+), 2 deletions(-)

diff --git a/sound/soc/codecs/cs42l42.c b/sound/soc/codecs/cs42l42.c
index dd677055a3c1..0b63dba07b6d 100644
--- a/sound/soc/codecs/cs42l42.c
+++ b/sound/soc/codecs/cs42l42.c
@@ -456,10 +456,36 @@ static const struct snd_kcontrol_new cs42l42_snd_controls[] = {
 				0x3f, 1, mixer_tlv)
 };
 
+static int cs42l42_hp_adc_ev(struct snd_soc_dapm_widget *w,
+			  struct snd_kcontrol *kcontrol, int event)
+{
+	struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
+	struct cs42l42_private *cs42l42 = snd_soc_component_get_drvdata(component);
+
+	switch (event) {
+	case SND_SOC_DAPM_PRE_PMU:
+		cs42l42->hp_adc_up_pending = true;
+		break;
+	case SND_SOC_DAPM_POST_PMU:
+		/* Only need one delay if HP and ADC are both powering-up */
+		if (cs42l42->hp_adc_up_pending) {
+			usleep_range(CS42L42_HP_ADC_EN_TIME_US,
+				     CS42L42_HP_ADC_EN_TIME_US + 1000);
+			cs42l42->hp_adc_up_pending = false;
+		}
+		break;
+	default:
+		break;
+	}
+
+	return 0;
+}
+
 static const struct snd_soc_dapm_widget cs42l42_dapm_widgets[] = {
 	/* Playback Path */
 	SND_SOC_DAPM_OUTPUT("HP"),
-	SND_SOC_DAPM_DAC("DAC", NULL, CS42L42_PWR_CTL1, CS42L42_HP_PDN_SHIFT, 1),
+	SND_SOC_DAPM_DAC_E("DAC", NULL, CS42L42_PWR_CTL1, CS42L42_HP_PDN_SHIFT, 1,
+			   cs42l42_hp_adc_ev, SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU),
 	SND_SOC_DAPM_MIXER("MIXER", CS42L42_PWR_CTL1, CS42L42_MIXER_PDN_SHIFT, 1, NULL, 0),
 	SND_SOC_DAPM_AIF_IN("SDIN1", NULL, 0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_AIF_IN("SDIN2", NULL, 1, SND_SOC_NOPM, 0, 0),
@@ -469,7 +495,8 @@ static const struct snd_soc_dapm_widget cs42l42_dapm_widgets[] = {
 
 	/* Capture Path */
 	SND_SOC_DAPM_INPUT("HS"),
-	SND_SOC_DAPM_ADC("ADC", NULL, CS42L42_PWR_CTL1, CS42L42_ADC_PDN_SHIFT, 1),
+	SND_SOC_DAPM_ADC_E("ADC", NULL, CS42L42_PWR_CTL1, CS42L42_ADC_PDN_SHIFT, 1,
+			   cs42l42_hp_adc_ev, SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU),
 	SND_SOC_DAPM_AIF_OUT("SDOUT1", NULL, 0, CS42L42_ASP_TX_CH_EN, CS42L42_ASP_TX0_CH1_SHIFT, 0),
 	SND_SOC_DAPM_AIF_OUT("SDOUT2", NULL, 1, CS42L42_ASP_TX_CH_EN, CS42L42_ASP_TX0_CH2_SHIFT, 0),
 
diff --git a/sound/soc/codecs/cs42l42.h b/sound/soc/codecs/cs42l42.h
index addb6560c649..d13749e9d8c5 100644
--- a/sound/soc/codecs/cs42l42.h
+++ b/sound/soc/codecs/cs42l42.h
@@ -762,6 +762,7 @@
 #define CS42L42_CLOCK_SWITCH_DELAY_US 150
 #define CS42L42_PLL_LOCK_POLL_US	250
 #define CS42L42_PLL_LOCK_TIMEOUT_US	1250
+#define CS42L42_HP_ADC_EN_TIME_US	20000
 
 static const char *const cs42l42_supply_names[CS42L42_NUM_SUPPLIES] = {
 	"VA",
@@ -795,6 +796,7 @@ struct  cs42l42_private {
 	u8 hs_bias_ramp_time;
 	u8 hs_bias_sense_en;
 	u8 stream_use;
+	bool hp_adc_up_pending;
 };
 
 #endif /* __CS42L42_H__ */
-- 
2.11.0


  parent reply	other threads:[~2021-08-10 15:40 UTC|newest]

Thread overview: 19+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-08-10 15:37 [PATCH 00/12] ASoC: cs42l42: Series of bugfixes and improvements Richard Fitzgerald
2021-08-10 15:37 ` [PATCH 01/12] ASoC: cs42l42: Use PLL for SCLK > 12.188MHz Richard Fitzgerald
2021-08-10 15:37 ` [PATCH 02/12] ASoC: cs42l42: Don't claim to support 192k Richard Fitzgerald
2021-08-10 15:37 ` [PATCH 03/12] ASoC: cs42l42: Always configure both ASP TX channels Richard Fitzgerald
2021-08-10 15:37 ` [PATCH 04/12] ASoC: cs42l42: Don't reconfigure the PLL while it is running Richard Fitzgerald
2021-08-10 15:49   ` Mark Brown
2021-08-10 16:27     ` Richard Fitzgerald
2021-08-11 11:56       ` Mark Brown
2021-08-11 12:21         ` Richard Fitzgerald
2021-08-11 14:41           ` Mark Brown
2021-08-11 10:56     ` Richard Fitzgerald
2021-08-10 15:37 ` [PATCH 05/12] ASoC: cs42l42: Set correct SRC MCLK Richard Fitzgerald
2021-08-10 15:37 ` [PATCH 06/12] ASoC: cs42l42: Mark OSC_SWITCH_STATUS register volatile Richard Fitzgerald
2021-08-10 15:37 ` Richard Fitzgerald [this message]
2021-08-10 15:37 ` [PATCH 08/12] ASoC: cs42l42: Prevent NULL pointer deref in interrupt handler Richard Fitzgerald
2021-08-10 15:37 ` [PATCH 09/12] ASoC: cs42l42: Remove runtime_suspend/runtime_resume callbacks Richard Fitzgerald
2021-08-10 15:37 ` [PATCH 10/12] ASoC: cs42l42: Remove redundant pll_divout member Richard Fitzgerald
2021-08-10 15:37 ` [PATCH 11/12] ASoC: cs42l42: Add HP Volume Scale control Richard Fitzgerald
2021-08-10 15:37 ` [PATCH 12/12] ASoC: cs42l42: Add control for audio slow-start switch Richard Fitzgerald

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=20210810153759.24333-8-rf@opensource.cirrus.com \
    --to=rf@opensource.cirrus.com \
    --cc=alsa-devel@alsa-project.org \
    --cc=broonie@kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=patches@opensource.cirrus.com \
    --subject='Re: [PATCH 07/12] ASoC: cs42l42: Allow time for HP/ADC to power-up after enable' \
    /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

This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).