Sound Open Firmware (SOF) is a host and DSP architecture agnostic audio DSP firmware. SOF is not tied to any specific host architecture or any specific physical IO communication type (it will work with on SoC DSPs, or DSP connected via SPI/I2C).
SOF is also not coupled to any particular DSP architecture and has abstraction similar to Linux to allow porting to other DSP architectures.
This patch series introduces the SOF core and utilities. Support for Intel devices is provided as a follow-up series.
The SOF core manages all the core DSP services and ALSA/ASoC IO. The core is responsible for loading firmware, parsing topology, exposing PCMs and kcontrols, providing debug and trace mechanisms and performing IPC between host and DSP.
The SOF core also has logic to allow reuse of existing machine drivers for other platforms/machines without any code modification. i.e. DAI links can be modified at runtime to bind with SOF and SOF topologies instead of existing hard coded DAI links and topology.
Main changes since v2 (end of August):
There are honestly too many changes to be listed... The biggest changes are the introduction of an ABI check and runtime_pm, as well as countless improvements coming from product validation. We will provide a revision history starting with the next update.
Precisions:
Since I've been maintaining the SOF kernel parts for most of 2018, Liam and I mutually agreed that it would be more efficient for me to send the patches upstream to avoid any disconnects. The code in this patchset is directly squashed from the SOF development branch [1], which tracks Mark Brown's for-next branch on a weekly basis and the configurations used for testing are based on the defconfigs at [2]
Full disclosure on known limitation and issues (full list at [3])
a) the interaction with ASoC is not always perfect, there are a couple of points where a better solution is desired (use of private data, support for link DMA, etc). The known points are explicitly documented in the code and will be updated. To be clearer, it's our belief that SOF does not cripple ASoC in any way, and that merging this SOF core does not harm others. It's just complicated to get things right, especially on a couple of cases where the topology and DPCM frameworks generate complex flows that very few people understand. b) The get/put methods for controls generate an IPC and possibly a wake-up. This is not optimal and is being fixed. c) The debugfs parts will be updated for runtime_pm parts d) The topology free, firmware release and Hdaudio exit sequences will be updated. It is our intention to fully support module load/unload and free all resources. e) runtime_pm is being hardened and the use of SMART_SUSPEND was suggested.
Thank you for reviews and comments, we appreciate the time spent commenting on this large patchset. Thanks in particular to Alan Cox and Andy Shevchenko for their comments on an earlier version.
Pierre
[1] https://github.com/thesofproject/linux [2] https://github.com/thesofproject/kconfig [3] https://github.com/thesofproject/linux/issues
Liam Girdwood (12): ASoC: SOF: Add Sound Open Firmware driver core ASoC: SOF: Add Sound Open Firmware KControl support ASoC: SOF: Add driver debug support. ASoC: SOF: Add support for IPC IO between DSP and Host ASoC: SOF: Add PCM operations support ASoC: SOF: Add support for loading topologies ASoC: SOF: Add DSP firmware logger support ASoC: SOF: Add DSP HW abstraction operations ASoC: SOF: Add firmware loader support ASoC: SOF: Add userspace ABI support ASoC: SOF: Add PM support ASoC: SOF: Add Nocodec machine driver support
Pierre-Louis Bossart (2): ASoC: SOF: Add xtensa support ASoC: SOF: Add utils
include/sound/soc.h | 3 + include/sound/sof.h | 91 + include/sound/sof/control.h | 125 ++ include/sound/sof/dai-intel.h | 175 ++ include/sound/sof/dai.h | 75 + include/sound/sof/header.h | 158 ++ include/sound/sof/info.h | 118 ++ include/sound/sof/pm.h | 48 + include/sound/sof/stream.h | 149 ++ include/sound/sof/topology.h | 256 +++ include/sound/sof/trace.h | 66 + include/sound/sof/xtensa.h | 44 + include/uapi/sound/sof/abi.h | 63 + include/uapi/sound/sof/eq.h | 164 ++ include/uapi/sound/sof/fw.h | 67 + include/uapi/sound/sof/header.h | 27 + include/uapi/sound/sof/manifest.h | 188 ++ include/uapi/sound/sof/tokens.h | 95 + include/uapi/sound/sof/tone.h | 21 + include/uapi/sound/sof/trace.h | 93 + sound/soc/sof/control.c | 421 +++++ sound/soc/sof/core.c | 398 +++++ sound/soc/sof/debug.c | 176 ++ sound/soc/sof/ipc.c | 813 +++++++++ sound/soc/sof/loader.c | 322 ++++ sound/soc/sof/nocodec.c | 81 + sound/soc/sof/ops.c | 200 +++ sound/soc/sof/ops.h | 379 ++++ sound/soc/sof/pcm.c | 755 ++++++++ sound/soc/sof/pm.c | 403 +++++ sound/soc/sof/sof-priv.h | 574 ++++++ sound/soc/sof/topology.c | 2775 +++++++++++++++++++++++++++++ sound/soc/sof/trace.c | 295 +++ sound/soc/sof/utils.c | 173 ++ sound/soc/sof/xtensa/Kconfig | 3 + sound/soc/sof/xtensa/Makefile | 5 + sound/soc/sof/xtensa/core.c | 152 ++ 37 files changed, 9951 insertions(+) create mode 100644 include/sound/sof.h create mode 100644 include/sound/sof/control.h create mode 100644 include/sound/sof/dai-intel.h create mode 100644 include/sound/sof/dai.h create mode 100644 include/sound/sof/header.h create mode 100644 include/sound/sof/info.h create mode 100644 include/sound/sof/pm.h create mode 100644 include/sound/sof/stream.h create mode 100644 include/sound/sof/topology.h create mode 100644 include/sound/sof/trace.h create mode 100644 include/sound/sof/xtensa.h create mode 100644 include/uapi/sound/sof/abi.h create mode 100644 include/uapi/sound/sof/eq.h create mode 100644 include/uapi/sound/sof/fw.h create mode 100644 include/uapi/sound/sof/header.h create mode 100644 include/uapi/sound/sof/manifest.h create mode 100644 include/uapi/sound/sof/tokens.h create mode 100644 include/uapi/sound/sof/tone.h create mode 100644 include/uapi/sound/sof/trace.h create mode 100644 sound/soc/sof/control.c create mode 100644 sound/soc/sof/core.c create mode 100644 sound/soc/sof/debug.c create mode 100644 sound/soc/sof/ipc.c create mode 100644 sound/soc/sof/loader.c create mode 100644 sound/soc/sof/nocodec.c create mode 100644 sound/soc/sof/ops.c create mode 100644 sound/soc/sof/ops.h create mode 100644 sound/soc/sof/pcm.c create mode 100644 sound/soc/sof/pm.c create mode 100644 sound/soc/sof/sof-priv.h create mode 100644 sound/soc/sof/topology.c create mode 100644 sound/soc/sof/trace.c create mode 100644 sound/soc/sof/utils.c create mode 100644 sound/soc/sof/xtensa/Kconfig create mode 100644 sound/soc/sof/xtensa/Makefile create mode 100644 sound/soc/sof/xtensa/core.c