diff options
| author | Cezary Rojewski <cezary.rojewski@intel.com> | 2022-12-02 16:28:26 +0100 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2022-12-05 14:05:18 +0000 |
| commit | 97d73d978271ade27fc751ad606f23c1c4c43678 (patch) | |
| tree | 62c3c572149cc66c72a9443aa0dddb06dcde5f2b /sound | |
| parent | f19a2caaab073873f673a41ce366ac898f34f543 (diff) | |
ALSA: hda: Allow for compress stream to hdac_ext_stream assignment
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>
Diffstat (limited to 'sound')
| -rw-r--r-- | sound/hda/ext/hdac_ext_stream.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/sound/hda/ext/hdac_ext_stream.c b/sound/hda/ext/hdac_ext_stream.c index 2a071a09224d..11b7119cc47e 100644 --- a/sound/hda/ext/hdac_ext_stream.c +++ b/sound/hda/ext/hdac_ext_stream.c @@ -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); |