On Fri, 12 Apr 2019 18:05:05 +0200, Pierre-Louis Bossart wrote: > > 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. > > https://www.sofproject.org/ > > 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. > > Changes since v5: > > In addition to addressing feedback from Takashi, the major > change in this series is the IPC rework. We reverted some > optimizations to help Daniel Baluta @ NXP submit support for i.MX > platforms, additional IPC core refactorization will start once we have > two platforms supported on github. Hopefully by then the code will be > accepted in the ASoC tree and we can submit delta patches, hint hint > wink wink. > > All feedback from Takashi addressed: > Tabify/align Kconfigs > Remove INFO_RESUME flag > Add const char* for core prototypes > Fix snd_sof_get_status return value > Use smd_pcm_format_physical_width() > Fix hw_constraints and BUFFER_BYTES/SIZE confusion > Remove useless fallthrough statements > Fix typos and duplicate words in comments and commit messages > Remove unnecessary casts, use container_of > Remove superfluous initializations > Fix potential race condition in debugfs > Check for wrap-arounds in loader > Fix alignment in debugfs read > Don't use devm_kasprintf for firmware name string. > > Other updates: > Major refactor of IPC handling (support for large messages, code > optimization, better abstraction to push Intel-specific code out of > the core). > Regenerate compressed page table only if needed > Support for multiple DAI hw_config (from <dragos_tarcatu@xxxxxxxxxx>) > Use iopoll macros (with small change due to indirection) > Fix PM refcount handling on errors > Rename/unify all definitions for effects (now 'process') > Added basic support for keyword/hotword detection and binding widgets > with external events > Fix release of topology resources > Support new IPC_PANIC message > Clean-up mandatory/optional callbacks, simplify wrappers > Add topology ABI check > Fix acpi/machine driver handling > Fix memory leak in debugfs error handling > Alignment with firmware header files > Fixed topology endianness issues > > Changes since v4: > > feedback from Mark: > Removed need for private field in soc_runtime > Completely reworked IPC, now much simpler and robust. IPC refactoring > work will continue to e.g. allow for different types of IPC hardware > and a better split between core and platform-specific drivers. > > Feedback from Takashi: > Clarified endianness and alignment issues for page tables > Removed useless mutexes > Removed unneeded initializations, return types and wrappers > Use snd_mask_set_format() > Trace code flow optimization > Removed checks on preallocate_pages() > Test status of open/close functions. > > Released reference when pm_runtime_get_sync fails > Fixed multiple memory allocation issues > Fixed static analysis warnings > Fixed error checks with copy_to_user() > Added support for multi-core DSPs > Fixed leaked references with firmware handling on resume > Multiple topology fixes/improvements (enum/switch, mux, removal of > duplicate connections, widget power not reported as ON) > Code simplifications (removed set-but-unused, typecasts, etc). > > Changes since v3: > > Addressed dozens ofcomments from Takashi Iwai, Mark Brown, Andy > Shevchenko, Daniel Baluta (Thanks!) > Hardened memory allocation, fixed module load/unload oops or errors > (now at hundreds of cycles on ApolloLake devices) > Fixed suspend/resume and removed use of suspend_late, now using > snd_soc_pm_ops and standard flow > Fixed topology free (multiple patches already contributed for > ASoC-core) > Fixed debugfs/pm_runtime interaction > Removed error checks on debugfs, changed to EXPORT_SYMBOL_GPL > Added filenames in debug messages, ues hex_dump_to_buffer > Removed "sof-audio" platform device and added better error checks on > probe > Reworked data structures to remove mix of const/variable fields and > duplication of pointers for platform-specific changes > Removed redundant ops tables > Fixed trace/logger issues > Fixed issues with loader (alignment and block size errors) > Fixed release_firmware handling (was all over the place) > Simplified PCI handling > Added comments on non-atomic triggers > Removed enum controls (not supported in topology) > Simplified include file dependencies > Fix cppcheck warnings > Fixed Kconfigs to deal with Kbuild warnings on exotic architectures > > Precisions: > > 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]. The patches are also used backported for Chromebook > devices. > > 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) 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. This > patchset also includes contributions from Daniel Baluta for loading > code on non-Intel platforms. Do we want to merge them for 5.2? If so, feel free to take my ack, for the whole series: Reviewed-by: Takashi Iwai <tiwai@xxxxxxx> thanks, Takashi _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx https://mailman.alsa-project.org/mailman/listinfo/alsa-devel
