Fixes cryptic "error macro 'AM_PATH_ALSA' not found in library
configure.ac:22" when attempting a local install as described at
https://thesofproject.github.io/latest/getting_started/build-guide/build-from-scratch.html#build-alsa-lib-and-alsa-utils-from-source
Fixes giant commit f9e6010d5e ("topology: plugins - add Intel nhlt
encoder plugin") which added a second invocation of `aclocal` in 2021
but forgot the extra `$alsa_m4_flags`.
To avoid duplication, do not fix by adding the missing `$alsa_m4_flags`
to the second aclocal invocation. Instead, drop that variable and append
`-I ../alsa-lib/utils` directly to $ACLOCAL_FLAGS
Closes: https://github.com/alsa-project/alsa-utils/pull/272
Signed-off-by: Marc Herbert <marc.herbert@intel.com>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Add Intel nhlt acpi table encoder plugin into topology2.0 processing.
Nhlt internal structure is defined in:
https://01.org/sites/default/files/595976_intel_sst_nhlt.pdf
Nhlt acpi table contain vendor specific binary data blobs that are used
in some Intel dsp platforms for configuring the dmic and ssp hardware.
The function of this code is mainly to generate the vendor specific
binary blobs, but as there is existing nhlt parser code and header in
kernel there's no point of re-inventing the container: just use the
existing nhlt acpi table format. Basically this code is creating similar
nhlt acpi table that you would get from: cat
/sys/firmware/acpi/tables/NHLT
This code will have implementation for dmic and ssp endpoints. Thus the
code will translate the topology dai tokens into vendor specific binary
blobs and pack them into nhlt acpi table. Ssp and dmic code is lifted
from Sound Open Firmware (sof) code base, thus it will have BSD-3
license.
This plugin can be enabled from command line with:
alsatplg -DPREPROCESS_PLUGINS="nhlt" -c foo.conf -p -o bar.tplg
You can also dump the nhlt binary into a file with additional define:
-DNHLT_BIN="nhlt.bin"
Link: https://github.com/alsa-project/alsa-utils/pull/129
Signed-off-by: Jaska Uimonen <jaska.uimonen@linux.intel.com>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
