This set of patches provides new interfaces - page allocation - and runtime flow adjustments - PM support - for compress operations. For HDA part, work has been done to account for compress streams when servicing IRQs, setting up BDLs and assigning DMAs.
End goal is to make room for one of DSP debug features: data probing. It takes advantage of compress streams when extracting data from running audio pipeline.
Initial review and development of probes can be found under: https://github.com/thesofproject/linux/pull/1276
with this very set of patches being separated and reviewed on: https://github.com/thesofproject/linux/pull/1571
Cezary Rojewski (7): ALSA: hda: Allow for compress stream to hdac_ext_stream assignment ALSA: hda: Prepare for compress stream support ALSA: hda: Interrupt servicing and BDL setup for compress streams ALSA: core: Expand DMA buffer information ALSA: core: Implement compress page allocation and free routines ASoC: compress: Add pm_runtime support ASoC: SOF: Intel: Account for compress streams when servicing IRQs
include/sound/compress_driver.h | 40 ++++++++++++++++++------ include/sound/hdaudio.h | 2 ++ include/sound/hdaudio_ext.h | 2 ++ sound/core/compress_offload.c | 42 ++++++++++++++++++++++++++ sound/hda/ext/hdac_ext_stream.c | 46 +++++++++++++++++++++++++--- sound/hda/hdac_controller.c | 4 +-- sound/hda/hdac_stream.c | 52 ++++++++++++++++++++------------ sound/soc/soc-compress.c | 29 +++++++++++++++++- sound/soc/sof/intel/hda-stream.c | 26 ++++++++++++++-- 9 files changed, 205 insertions(+), 38 deletions(-)