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From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
To: alsa-devel@alsa-project.org
Cc: tiwai@suse.de, broonie@kernel.org,
	Keyon Jie <yang.jie@linux.intel.com>,
	Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Subject: [alsa-devel] [PATCH 2/4] ASoC: SOF: PM: add check before setting d0_substate
Date: Mon, 11 Nov 2019 16:33:41 -0600	[thread overview]
Message-ID: <20191111223343.19986-3-pierre-louis.bossart@linux.intel.com> (raw)
In-Reply-To: <20191111223343.19986-1-pierre-louis.bossart@linux.intel.com>

From: Keyon Jie <yang.jie@linux.intel.com>

Add check before seeting d0_substate and return success if Audio DSP is
already in the target substate.

Signed-off-by: Keyon Jie <yang.jie@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
---
 sound/soc/sof/pm.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sound/soc/sof/pm.c b/sound/soc/sof/pm.c
index 3204c92f0e7d..b89810bf3230 100644
--- a/sound/soc/sof/pm.c
+++ b/sound/soc/sof/pm.c
@@ -416,6 +416,9 @@ int snd_sof_set_d0_substate(struct snd_sof_dev *sdev,
 {
 	int ret;
 
+	if (sdev->d0_substate == d0_substate)
+		return 0;
+
 	/* do platform specific set_state */
 	ret = snd_sof_dsp_set_power_state(sdev, d0_substate);
 	if (ret < 0)
-- 
2.20.1

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  parent reply	other threads:[~2019-11-11 22:34 UTC|newest]

Thread overview: 9+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-11-11 22:33 [alsa-devel] [PATCH 0/4] ASoC: SOF: Intel: only use D0i3 if needed Pierre-Louis Bossart
2019-11-11 22:33 ` [alsa-devel] [PATCH 1/4] ASoC: SOF: PM: add state machine to comments Pierre-Louis Bossart
2019-11-12 17:16   ` [alsa-devel] Applied "ASoC: SOF: PM: add state machine to comments" to the asoc tree Mark Brown
2019-11-11 22:33 ` Pierre-Louis Bossart [this message]
2019-11-12 17:16   ` [alsa-devel] Applied "ASoC: SOF: PM: add check before setting d0_substate" " Mark Brown
2019-11-11 22:33 ` [alsa-devel] [PATCH 3/4] ASoC: SOF: add helper to check if we should enter d0i3 suspend Pierre-Louis Bossart
2019-11-12 17:16   ` [alsa-devel] Applied "ASoC: SOF: add helper to check if we should enter d0i3 suspend" to the asoc tree Mark Brown
2019-11-11 22:33 ` [alsa-devel] [PATCH 4/4] ASoC: SOF: PM: only suspend to D0I3 when needed Pierre-Louis Bossart
2019-11-12 17:16   ` [alsa-devel] Applied "ASoC: SOF: PM: only suspend to D0I3 when needed" to the asoc tree Mark Brown

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