From: Lucas Tanure <tanureal@opensource.cirrus.com>
To: James Schulman <james.schulman@cirrus.com>,
David Rhodes <david.rhodes@cirrus.com>,
Liam Girdwood <lgirdwood@gmail.com>,
Mark Brown <broonie@kernel.org>, Jaroslav Kysela <perex@perex.cz>,
Takashi Iwai <tiwai@suse.com>
Cc: patches@opensource.cirrus.com,
Richard Fitzgerald <rf@opensource.cirrus.com>,
alsa-devel@alsa-project.org,
Lucas Tanure <tanureal@opensource.cirrus.com>,
linux-kernel@vger.kernel.org
Subject: [PATCH v2 13/15] ASoC: cs42l42: Wait at least 150us after writing SCLK_PRESENT
Date: Fri, 5 Mar 2021 17:34:40 +0000 [thread overview]
Message-ID: <20210305173442.195740-14-tanureal@opensource.cirrus.com> (raw)
In-Reply-To: <20210305173442.195740-1-tanureal@opensource.cirrus.com>
From: Richard Fitzgerald <rf@opensource.cirrus.com>
There must be a delay of at least 150us after writing SCLK_PRESENT
before issuing another I2C write.
This is done using struct reg_sequence because it can specify a delay
after the write and the whole sequence is written atomically.
Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com>
Signed-off-by: Lucas Tanure <tanureal@opensource.cirrus.com>
---
Changes in v2:
- struct cs42l42_private add by this patch was wrong and moved to the
correct patch
- Lucas signed-off added
sound/soc/codecs/cs42l42.c | 27 ++++++++++++++++++++++-----
sound/soc/codecs/cs42l42.h | 1 +
2 files changed, 23 insertions(+), 5 deletions(-)
diff --git a/sound/soc/codecs/cs42l42.c b/sound/soc/codecs/cs42l42.c
index f0270de2ccb8a..4181765d99af7 100644
--- a/sound/soc/codecs/cs42l42.c
+++ b/sound/soc/codecs/cs42l42.c
@@ -549,6 +549,24 @@ static const struct snd_soc_component_driver soc_component_dev_cs42l42 = {
.non_legacy_dai_naming = 1,
};
+/* Switch to SCLK. Atomic delay after the write to allow the switch to complete. */
+static const struct reg_sequence cs42l42_to_sclk_seq[] = {
+ {
+ .reg = CS42L42_OSC_SWITCH,
+ .def = CS42L42_SCLK_PRESENT_MASK,
+ .delay_us = CS42L42_CLOCK_SWITCH_DELAY_US,
+ },
+};
+
+/* Switch to OSC. Atomic delay after the write to allow the switch to complete. */
+static const struct reg_sequence cs42l42_to_osc_seq[] = {
+ {
+ .reg = CS42L42_OSC_SWITCH,
+ .def = 0,
+ .delay_us = CS42L42_CLOCK_SWITCH_DELAY_US,
+ },
+};
+
struct cs42l42_pll_params {
u32 sclk;
u8 mclk_div;
@@ -861,8 +879,8 @@ static int cs42l42_mute_stream(struct snd_soc_dai *dai, int mute, int stream)
* SCLK must remain running until after this clock switch.
* Without a source of clock the I2C bus doesn't work.
*/
- snd_soc_component_update_bits(component, CS42L42_OSC_SWITCH,
- CS42L42_SCLK_PRESENT_MASK, 0);
+ regmap_multi_reg_write(cs42l42->regmap, cs42l42_to_osc_seq,
+ ARRAY_SIZE(cs42l42_to_osc_seq));
snd_soc_component_update_bits(component, CS42L42_PLL_CTL1,
CS42L42_PLL_START_MASK, 0);
}
@@ -873,9 +891,8 @@ static int cs42l42_mute_stream(struct snd_soc_dai *dai, int mute, int stream)
CS42L42_PLL_START_MASK, 1);
/* Mark SCLK as present, turn off internal oscillator */
- snd_soc_component_update_bits(component, CS42L42_OSC_SWITCH,
- CS42L42_SCLK_PRESENT_MASK,
- CS42L42_SCLK_PRESENT_MASK);
+ regmap_multi_reg_write(cs42l42->regmap, cs42l42_to_sclk_seq,
+ ARRAY_SIZE(cs42l42_to_sclk_seq));
}
cs42l42->stream_use |= 1 << stream;
diff --git a/sound/soc/codecs/cs42l42.h b/sound/soc/codecs/cs42l42.h
index 429c6833fc811..214cee762709d 100644
--- a/sound/soc/codecs/cs42l42.h
+++ b/sound/soc/codecs/cs42l42.h
@@ -755,6 +755,7 @@
#define CS42L42_NUM_SUPPLIES 5
#define CS42L42_BOOT_TIME_US 3000
+#define CS42L42_CLOCK_SWITCH_DELAY_US 150
static const char *const cs42l42_supply_names[CS42L42_NUM_SUPPLIES] = {
"VA",
--
2.30.1
next prev parent reply other threads:[~2021-03-05 17:40 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-05 17:34 [PATCH v2 00/15] Report jack and button detection + Capture Support Lucas Tanure
2021-03-05 17:34 ` [PATCH v2 01/15] ASoC: cs42l42: Fix Bitclock polarity inversion Lucas Tanure
2021-03-05 17:34 ` [PATCH v2 02/15] ASoC: cs42l42: Fix channel width support Lucas Tanure
2021-03-05 17:34 ` [PATCH v2 03/15] ASoC: cs42l42: Fix mixer volume control Lucas Tanure
2021-03-05 17:34 ` [PATCH v2 04/15] ASoC: cs42l42: Don't enable/disable regulator at Bias Level Lucas Tanure
2021-03-05 17:34 ` [PATCH v2 05/15] ASoC: cs42l42: Always wait at least 3ms after reset Lucas Tanure
2021-03-05 17:34 ` [PATCH v2 06/15] ASoC: cs42l42: Remove power if the driver is being removed Lucas Tanure
2021-03-05 18:49 ` Mark Brown
2021-03-05 17:34 ` [PATCH v2 07/15] ASoC: cs42l42: Disable regulators if probe fails Lucas Tanure
2021-03-05 17:34 ` [PATCH v2 08/15] ASoC: cs42l42: Provide finer control on playback path Lucas Tanure
2021-03-05 17:34 ` [PATCH v2 09/15] ASoC: cs42l42: Set clock source for both ways of stream Lucas Tanure
2021-03-05 17:34 ` [PATCH v2 10/15] ASoC: cs42l42: Add Capture Support Lucas Tanure
2021-03-05 17:34 ` [PATCH v2 11/15] ASoC: cs42l42: Report jack and button detection Lucas Tanure
2021-03-05 17:34 ` [PATCH v2 12/15] ASoC: cs42l42: Use bclk from hw_params if set_sysclk was not called Lucas Tanure
2021-03-05 17:34 ` Lucas Tanure [this message]
2021-03-05 17:34 ` [PATCH v2 14/15] ASoC: cs42l42: Only start PLL if it is needed Lucas Tanure
2021-03-05 17:34 ` [PATCH v2 15/15] ASoC: cs42l42: Wait for PLL to lock before switching to it Lucas Tanure
2021-03-08 16:06 ` (subset) [PATCH v2 00/15] Report jack and button detection + Capture Support Mark Brown
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=20210305173442.195740-14-tanureal@opensource.cirrus.com \
--to=tanureal@opensource.cirrus.com \
--cc=alsa-devel@alsa-project.org \
--cc=broonie@kernel.org \
--cc=david.rhodes@cirrus.com \
--cc=james.schulman@cirrus.com \
--cc=lgirdwood@gmail.com \
--cc=linux-kernel@vger.kernel.org \
--cc=patches@opensource.cirrus.com \
--cc=perex@perex.cz \
--cc=rf@opensource.cirrus.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
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
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).