The patchset focuses on debug functionality for the avs-driver. Two major blocks are covered here: data probing and AudioDSP firmware logging. Both are configured and controlled through debugfs.
Data probing is a AudioDSP debug functionality which allows for gathering the actual data that is being routed to or from a module. Helps in debugging its processing capabilities - navigate to a specific module which may have caused a glitch within a pipeline (set of modules bound together).
First few allow for assigning compress stream to a HDAudio stream, what is currently limited to pcm substreams only. These patches were already present on this list and reviewed in the past [1].
The next few tidy existing debug-related code up so it's ready for addition of new functionalities and make it clear which part of the avs is debug related and which is not. These also simplify the existing locking around the trace fifo.
Afterward, debug-related IPCs are defined along with stub soc-component and compress DAI operations. Not much is done there as it's not a standard PCM streaming scenario. Most code found in compress operations is inherited from the HOST side of HDAudio streaming found in pcm.c file of the driver.
Finally, a debugfs file operations are defined. These facilitate connecting to DSP modules from which the data shall be gathered as well as control and configuration of firmware logging. Additionally, entries are added to allow for dumping snapshots of key memory windows.
[1]: https://lore.kernel.org/alsa-devel/20200124190413.18154-1-cezary.rojewski@in...
Cezary Rojewski (16): 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 ASoC: Intel: avs: Introduce avs_log_buffer_status_locked() ASoC: Intel: avs: Drop fifo_lock ASoC: Intel: avs: Introduce debug-context aware helpers ASoC: Intel: avs: Make enable_logs() dependent on DEBUG_FS ASoC: Intel: avs: Drop usage of debug members in non-debug code ASoC: Intel: avs: Add data probing requests ASoC: Intel: avs: Probe compress operations ASoC: Intel: avs: Data probing soc-component ASoC: Intel: avs: Add probe machine board ASoC: Intel: avs: Probing and firmware tracing over debugfs ASoC: Intel: avs: Gather remaining logs on strace_release() ASoC: Intel: avs: Allow for dumping FW_REGS area ASoC: Intel: avs: Allow for dumping debug window snapshot
include/sound/hdaudio_ext.h | 2 + sound/hda/ext/hdac_ext_stream.c | 41 +++ sound/hda/hdac_controller.c | 4 +- sound/hda/hdac_stream.c | 52 +-- sound/soc/intel/Kconfig | 1 + sound/soc/intel/avs/Makefile | 4 + sound/soc/intel/avs/apl.c | 24 +- sound/soc/intel/avs/avs.h | 80 ++++- sound/soc/intel/avs/board_selection.c | 33 ++ sound/soc/intel/avs/boards/Kconfig | 8 + sound/soc/intel/avs/boards/Makefile | 2 + sound/soc/intel/avs/boards/probe.c | 64 ++++ sound/soc/intel/avs/core.c | 2 + sound/soc/intel/avs/debugfs.c | 436 ++++++++++++++++++++++++++ sound/soc/intel/avs/ipc.c | 2 +- sound/soc/intel/avs/messages.c | 104 +++++- sound/soc/intel/avs/messages.h | 53 ++++ sound/soc/intel/avs/pcm.c | 6 +- sound/soc/intel/avs/probes.c | 312 ++++++++++++++++++ sound/soc/intel/avs/registers.h | 3 +- sound/soc/intel/avs/skl.c | 17 +- sound/soc/intel/avs/utils.c | 22 -- 22 files changed, 1172 insertions(+), 100 deletions(-) create mode 100644 sound/soc/intel/avs/boards/probe.c create mode 100644 sound/soc/intel/avs/debugfs.c create mode 100644 sound/soc/intel/avs/probes.c