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| author | Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> | 2022-04-21 23:31:59 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2022-04-25 15:58:35 +0300 |
| commit | 722cbbfaed2a290b1de1fb0ec4ee9a15ec240f7c (patch) | |
| tree | a21488759d7fc521c72ecabeeb2d142c2824d405 /sound/soc/sof/intel/hda-dai.c | |
| parent | 23b1944e46ab4cd7cbd4ef999f814fc6c6f2eb88 (diff) | |
| download | linux-722cbbfaed2a290b1de1fb0ec4ee9a15ec240f7c.tar.xz | |
ASoC: SOF: Intel: hda-dai: reset dma_data and release stream
The sequences are missing a call to snd_soc_dai_set_dma_data() when
the stream is cleared, as well as a release of the stream, and tests
to avoid pointer dereferences.
This fixes an underflow issue in a corner case with two streams paused
before a suspend-resume cycle. After resume, the pause_release of the
last stream causes an underflow due to an invalid sequence.
This problem probably existed since the beginning and is only see with
prototypes of a 'deep-buffer' capability, which depends on additional
ASoC fixes, so there's is no Fixes: tag and no real requirement to
backport this patch.
BugLink: https://github.com/thesofproject/linux/issues/3151
Co-developed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Rander Wang <rander.wang@intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com>
Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com>
Link: https://lore.kernel.org/r/20220421203201.1550328-13-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound/soc/sof/intel/hda-dai.c')
| -rw-r--r-- | sound/soc/sof/intel/hda-dai.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/sound/soc/sof/intel/hda-dai.c b/sound/soc/sof/intel/hda-dai.c index dbccd75defe8..644f75081edd 100644 --- a/sound/soc/sof/intel/hda-dai.c +++ b/sound/soc/sof/intel/hda-dai.c @@ -230,6 +230,9 @@ static int hda_link_dma_trigger(struct snd_pcm_substream *substream, int cmd) return -EINVAL; dev_dbg(cpu_dai->dev, "%s: cmd=%d\n", __func__, cmd); + if (!hext_stream) + return 0; + switch (cmd) { case SNDRV_PCM_TRIGGER_START: case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: @@ -243,8 +246,10 @@ static int hda_link_dma_trigger(struct snd_pcm_substream *substream, int cmd) stream_tag = hdac_stream(hext_stream)->stream_tag; snd_hdac_ext_link_clear_stream_id(link, stream_tag); } - + snd_soc_dai_set_dma_data(cpu_dai, substream, NULL); + snd_hdac_ext_stream_release(hext_stream, HDAC_EXT_STREAM_TYPE_LINK); hext_stream->link_prepared = 0; + break; case SNDRV_PCM_TRIGGER_PAUSE_PUSH: snd_hdac_ext_link_stream_clear(hext_stream); @@ -370,7 +375,7 @@ static int ipc3_hda_dai_prepare(struct snd_pcm_substream *substream, int stream = substream->stream; int ret; - if (hext_stream->link_prepared) + if (hext_stream && hext_stream->link_prepared) return 0; dev_dbg(sdev->dev, "%s: prepare stream dir %d\n", __func__, substream->stream); @@ -460,6 +465,8 @@ static int hda_dai_suspend(struct hdac_bus *bus) /* set internal flag for BE */ list_for_each_entry(s, &bus->stream_list, list) { + struct sof_intel_hda_stream *hda_stream; + hext_stream = stream_to_hdac_ext_stream(s); /* @@ -489,13 +496,20 @@ static int hda_dai_suspend(struct hdac_bus *bus) stream_tag = hdac_stream(hext_stream)->stream_tag; snd_hdac_ext_link_clear_stream_id(link, stream_tag); } + snd_soc_dai_set_dma_data(cpu_dai, hext_stream->link_substream, NULL); + snd_hdac_ext_stream_release(hext_stream, HDAC_EXT_STREAM_TYPE_LINK); hext_stream->link_prepared = 0; + /* free the host DMA channel reserved by hostless streams */ + hda_stream = hstream_to_sof_hda_stream(hext_stream); + hda_stream->host_reserved = 0; + /* for consistency with TRIGGER_SUSPEND we free DAI resources */ ret = hda_dai_hw_free_ipc(hdac_stream(hext_stream)->direction, cpu_dai); if (ret < 0) return ret; } + } return 0; |