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ASoC: SOF: Intel: hda: reset link DMA state in prepare

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When application goes through SUSPEND/STOP->PREPARE->START
cycle, we should always reprogram the DAI link DMA to ensure
it is in sync with the host PCM DMA.

Use same state tracking logic to handle both restart and
system resume flows. Use link_prepared field of
'struct hdac_ext_stream' to store the state, instead of
adding redundant fields to SOF specific structs.

Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20190722141402.7194-18-pierre-louis.bossart@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Kai Vehmanen
2019-07-22 09:13:58 -05:00
committed by Mark Brown
parent 672ff5e359
commit a3ebccb52e
3 changed files with 9 additions and 17 deletions
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17
sound/soc/sof/intel/hda-dsp.c
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@@ -425,25 +425,19 @@ int hda_dsp_suspend(struct snd_sof_dev *sdev)
int hda_dsp_set_hw_params_upon_resume(struct snd_sof_dev *sdev)
{
struct hdac_bus *bus = sof_to_bus(sdev);
struct sof_intel_hda_stream *hda_stream;
struct hdac_ext_stream *stream;
struct hdac_stream *s;
#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA)
struct hdac_bus *bus = sof_to_bus(sdev);
struct snd_soc_pcm_runtime *rtd;
struct hdac_ext_stream *stream;
struct hdac_ext_link *link;
struct hdac_stream *s;
const char *name;
int stream_tag;
#endif
/* set internal flag for BE */
list_for_each_entry(s, &bus->stream_list, list) {
stream = stream_to_hdac_ext_stream(s);
hda_stream = container_of(stream, struct sof_intel_hda_stream,
hda_stream);
hda_stream->hw_params_upon_resume = 1;
#if IS_ENABLED(CONFIG_SND_SOC_SOF_HDA)
/*
* clear and release stream. This should already be taken care
* for running streams when the SUSPEND trigger is called.
@@ -460,8 +454,9 @@ int hda_dsp_set_hw_params_upon_resume(struct snd_sof_dev *sdev)
snd_hdac_ext_link_clear_stream_id(link, stream_tag);
snd_hdac_ext_stream_release(stream,
HDAC_EXT_STREAM_TYPE_LINK);
stream->link_prepared = 0;
}
#endif
}
#endif
return 0;
}