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From: Guenter Roeck <linux@roeck-us.net>
To: Cezary Rojewski <cezary.rojewski@intel.com>
Cc: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
	Liam Girdwood <liam.r.girdwood@linux.intel.com>,
	Jie Yang <yang.jie@linux.intel.com>,
	Mark Brown <broonie@kernel.org>,
	alsa-devel@alsa-project.org, linux-kernel@vger.kernel.org,
	Guenter Roeck <linux@roeck-us.net>, Brent Lu <brent.lu@intel.com>,
	Curtis Malainey <cujomalainey@chromium.org>
Subject: [PATCH] ASOC: Intel: kbl_rt5663_rt5514_max98927: Do not try to disable disabled clock
Date: Wed, 11 Nov 2020 12:54:34 -0800	[thread overview]
Message-ID: <20201111205434.207610-1-linux@roeck-us.net> (raw)

In kabylake_set_bias_level(), enabling mclk may fail if the clock has
already been enabled by the firmware. Attempts to disable that clock
later will fail with a warning backtrace.

mclk already disabled
WARNING: CPU: 2 PID: 108 at drivers/clk/clk.c:952 clk_core_disable+0x1b6/0x1cf
...
Call Trace:
 clk_disable+0x2d/0x3a
 kabylake_set_bias_level+0x72/0xfd [snd_soc_kbl_rt5663_rt5514_max98927]
 snd_soc_card_set_bias_level+0x2b/0x6f
 snd_soc_dapm_set_bias_level+0xe1/0x209
 dapm_pre_sequence_async+0x63/0x96
 async_run_entry_fn+0x3d/0xd1
 process_one_work+0x2a9/0x526
...

Only disable the clock if it has been enabled.

Fixes: 15747a802075 ("ASoC: eve: implement set_bias_level function for rt5514")
Cc: Brent Lu <brent.lu@intel.com>
Cc: Curtis Malainey <cujomalainey@chromium.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
 sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c b/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c
index 922cd0176e1f..f95546c184aa 100644
--- a/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c
+++ b/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c
@@ -700,6 +700,8 @@ static int kabylake_set_bias_level(struct snd_soc_card *card,
 	switch (level) {
 	case SND_SOC_BIAS_PREPARE:
 		if (dapm->bias_level == SND_SOC_BIAS_ON) {
+			if (!__clk_is_enabled(priv->mclk))
+				return 0;
 			dev_dbg(card->dev, "Disable mclk");
 			clk_disable_unprepare(priv->mclk);
 		} else {
-- 
2.17.1


WARNING: multiple messages have this Message-ID (diff)
From: Guenter Roeck <linux@roeck-us.net>
To: Cezary Rojewski <cezary.rojewski@intel.com>
Cc: alsa-devel@alsa-project.org, Jie Yang <yang.jie@linux.intel.com>,
	Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
	linux-kernel@vger.kernel.org,
	Liam Girdwood <liam.r.girdwood@linux.intel.com>,
	Mark Brown <broonie@kernel.org>,
	Curtis Malainey <cujomalainey@chromium.org>,
	Brent Lu <brent.lu@intel.com>, Guenter Roeck <linux@roeck-us.net>
Subject: [PATCH] ASOC: Intel: kbl_rt5663_rt5514_max98927: Do not try to disable disabled clock
Date: Wed, 11 Nov 2020 12:54:34 -0800	[thread overview]
Message-ID: <20201111205434.207610-1-linux@roeck-us.net> (raw)

In kabylake_set_bias_level(), enabling mclk may fail if the clock has
already been enabled by the firmware. Attempts to disable that clock
later will fail with a warning backtrace.

mclk already disabled
WARNING: CPU: 2 PID: 108 at drivers/clk/clk.c:952 clk_core_disable+0x1b6/0x1cf
...
Call Trace:
 clk_disable+0x2d/0x3a
 kabylake_set_bias_level+0x72/0xfd [snd_soc_kbl_rt5663_rt5514_max98927]
 snd_soc_card_set_bias_level+0x2b/0x6f
 snd_soc_dapm_set_bias_level+0xe1/0x209
 dapm_pre_sequence_async+0x63/0x96
 async_run_entry_fn+0x3d/0xd1
 process_one_work+0x2a9/0x526
...

Only disable the clock if it has been enabled.

Fixes: 15747a802075 ("ASoC: eve: implement set_bias_level function for rt5514")
Cc: Brent Lu <brent.lu@intel.com>
Cc: Curtis Malainey <cujomalainey@chromium.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
---
 sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c b/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c
index 922cd0176e1f..f95546c184aa 100644
--- a/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c
+++ b/sound/soc/intel/boards/kbl_rt5663_rt5514_max98927.c
@@ -700,6 +700,8 @@ static int kabylake_set_bias_level(struct snd_soc_card *card,
 	switch (level) {
 	case SND_SOC_BIAS_PREPARE:
 		if (dapm->bias_level == SND_SOC_BIAS_ON) {
+			if (!__clk_is_enabled(priv->mclk))
+				return 0;
 			dev_dbg(card->dev, "Disable mclk");
 			clk_disable_unprepare(priv->mclk);
 		} else {
-- 
2.17.1


             reply	other threads:[~2020-11-11 20:54 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-11-11 20:54 Guenter Roeck [this message]
2020-11-11 20:54 ` [PATCH] ASOC: Intel: kbl_rt5663_rt5514_max98927: Do not try to disable disabled clock Guenter Roeck
2020-11-18 20:59 ` Mark Brown
2020-11-18 20:59   ` Mark Brown

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