From: Jiada Wang <jiada_wang@mentor.com>
To: <lgirdwood@gmail.com>, <broonie@kernel.org>, <perex@perex.cz>,
<tiwai@suse.com>
Cc: <alsa-devel@alsa-project.org>, <linux-kernel@vger.kernel.org>,
<jiada_wang@mentor.com>
Subject: [PATCH 1/1] soc-pcm: check symmetry after hw_params
Date: Wed, 20 Sep 2017 15:25:30 +0900 [thread overview]
Message-ID: <20170920062530.12252-1-jiada_wang@mentor.com> (raw)
hw_params may be fixup by be_hw_params_fixup, calling
soc_pcm_params_symmetry() before hw_params will have issue
if there is hw_params changes in be_hw_params_fixup.
For example, with following use case
1. a dai-link which is able to convert sample rate on BE side
2. set BE playback and capture sample rate to 44100Hz
3. play a 48000Hz audio stream with this dai-link
4. record from this dai-link with 44100Hz sample rate
Got following error message when record starts
[ 495.013527] be_link_ak4613: ASoC: unmatched rate symmetry: 48000 - 44100
[ 495.021729] be_link_ak4613: ASoC: hw_params BE failed -22
[ 495.028589] rsnd_link0: ASoC: hw_params BE failed -22
Because in soc_pcm_hw_params(), FE rate is still having value before
it is fixup by be_hw_params_fixup(), when soc_pcm_params_symmetry() checks
symmetry, thus soc_pcm_params_symmetry() complains about the unmatched rate
between the active stream and the new stream tries to start.
This patch moves soc_pcm_params_symmetry() after hw_params to resolve the
above issue.
Signed-off-by: Jiada Wang <jiada_wang@mentor.com>
---
sound/soc/soc-pcm.c | 9 ++++-----
1 file changed, 4 insertions(+), 5 deletions(-)
diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index 94b88b8..f11421f 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -855,11 +855,6 @@ static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
int i, ret = 0;
mutex_lock_nested(&rtd->pcm_mutex, rtd->pcm_subclass);
-
- ret = soc_pcm_params_symmetry(substream, params);
- if (ret)
- goto out;
-
if (rtd->dai_link->ops && rtd->dai_link->ops->hw_params) {
ret = rtd->dai_link->ops->hw_params(substream, params);
if (ret < 0) {
@@ -930,6 +925,10 @@ static int soc_pcm_hw_params(struct snd_pcm_substream *substream,
cpu_dai->sample_bits =
snd_pcm_format_physical_width(params_format(params));
+
+ ret = soc_pcm_params_symmetry(substream, params);
+ if (ret)
+ goto platform_err;
out:
mutex_unlock(&rtd->pcm_mutex);
return ret;
--
2.9.3
next reply other threads:[~2017-09-20 6:25 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-09-20 6:25 Jiada Wang [this message]
2017-09-20 11:41 ` [PATCH 1/1] soc-pcm: check symmetry after hw_params Mark Brown
2017-09-20 11:41 ` Applied "ASoC: soc-pcm: check symmetry after hw_params" to the asoc tree Mark Brown
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