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ALSA: hda: Allow for compress stream to hdac_ext_stream assignment

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Currently only PCM streams can enlist hdac_stream for their data
transfer. Add cstream field to hdac_ext_stream to expose possibility of
compress stream assignment in place of PCM one.
Limited to HOST-type only as there no other users on the horizon.

Signed-off-by: Cezary Rojewski <cezary.rojewski@intel.com>
Acked-by: Takashi Iwai <tiwai@suse.de>
Link: https://lore.kernel.org/r/20221202152841.672536-2-cezary.rojewski@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Cezary Rojewski 2022-12-02 16:28:26 +01:00 committed by Mark Brown
parent f19a2caaab
commit 97d73d9782
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GPG Key ID: 24D68B725D5487D0
2 changed files with 43 additions and 0 deletions
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2
include/sound/hdaudio_ext.h
View File

@ -75,6 +75,8 @@ struct hdac_ext_stream *snd_hdac_ext_stream_assign(struct hdac_bus *bus,
struct snd_pcm_substream *substream,
int type);
void snd_hdac_ext_stream_release(struct hdac_ext_stream *hext_stream, int type);
struct hdac_ext_stream *snd_hdac_ext_cstream_assign(struct hdac_bus *bus,
struct snd_compr_stream *cstream);
void snd_hdac_ext_stream_decouple_locked(struct hdac_bus *bus,
struct hdac_ext_stream *hext_stream, bool decouple);
void snd_hdac_ext_stream_decouple(struct hdac_bus *bus,

41
sound/hda/ext/hdac_ext_stream.c
View File

@ -14,6 +14,7 @@
#include <sound/pcm.h>
#include <sound/hda_register.h>
#include <sound/hdaudio_ext.h>
#include <sound/compress_driver.h>
/**
* snd_hdac_ext_stream_init - initialize each stream (aka device)
@ -367,3 +368,43 @@ void snd_hdac_ext_stream_release(struct hdac_ext_stream *hext_stream, int type)
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_stream_release);
/**
* snd_hdac_ext_cstream_assign - assign a host stream for compress
* @bus: HD-audio core bus
* @cstream: Compress stream to assign
*
* Assign an unused host stream for the given compress stream.
* If no stream is free, NULL is returned. Stream is decoupled
* before assignment.
*/
struct hdac_ext_stream *snd_hdac_ext_cstream_assign(struct hdac_bus *bus,
struct snd_compr_stream *cstream)
{
struct hdac_ext_stream *res = NULL;
struct hdac_stream *hstream;
spin_lock_irq(&bus->reg_lock);
list_for_each_entry(hstream, &bus->stream_list, list) {
struct hdac_ext_stream *hext_stream = stream_to_hdac_ext_stream(hstream);
if (hstream->direction != cstream->direction)
continue;
if (!hstream->opened) {
res = hext_stream;
break;
}
}
if (res) {
snd_hdac_ext_stream_decouple_locked(bus, res, true);
res->hstream.opened = 1;
res->hstream.running = 0;
res->hstream.cstream = cstream;
}
spin_unlock_irq(&bus->reg_lock);
return res;
}
EXPORT_SYMBOL_GPL(snd_hdac_ext_cstream_assign);