This series extends the SDCA class driver to work on DT / non-ACPI
platforms via a codec-provided static topology, and adds the Qualcomm
WCD9378 (Tambora) codec as the first user driven in SDCA / compute
mode. Tested on the Snapdragon X2 Elite Glymur CRD.
Patches 1-6 extend the SDCA class helpers:
- Kconfig gate to build the class without ACPI enabled.
- PM helpers keyed on a codec-embedded struct sdca_class_drv, so
codec drivers can build their own dev_pm_ops.
- Class SoundWire probe/remove exposed as library functions
callable from codec-specific SDW slave drivers.
- class_ops with a populate_function hook so codec drivers can
supply the SDCA function payload from static tables on DT /
non-DisCo platforms.
- Class function driver registers SDCA_FUNCTION_TYPE_SIMPLE_JACK,
and resolves sound-dai cells by entity index.
- sdca_apply_default_control_classifiers() applies the same
is_volatile / has_reset flags that the DisCo/ACPI parser would.
Note:
None of these are functional changes in sdca core, all of these are
helper functions to allow non-ACPI users to use sdca core.
Patches 7-8 add the WCD9378 SDCA / compute-mode codec:
- dt-bindings for the SoundWire slave in compute mode.
- Codec driver split across wcd9378-sdw.c (SoundWire plumbing)
and wcd9378-sdca.c (SDCA topology + class_ops), sharing a
wcd9378-sdca.h header. A future mobile-mode driver can plug
into the same module by adding its own files.
Testing: HPH playback and headset-mic capture confirmed on the
Snapdragon X2 Elite Glymur CRD. Will test it on Lenovo T14s.
Jack detection is not wired up in this series.
Changes since v2 [1]:
- Un-export sdca_class_pm_ops and per-op wrappers; keep them
static and let codecs compose their own dev_pm_ops.
- Drop the exported sdca_class_read_prop() helper; codecs
open-code the four lines locally.
- class_function: check the codec-provided ops hook first, fall
back to sdca_parse_function() only when a firmware node is
present.
- Rename sdca_class_hw_ops to sdca_class_ops; populate_function
does no bus I/O.
- Drop the hw_init callback; codec users moved bring-up into
their own SoundWire probe.
- wcd9378-sdca: MIC_BIAS fixed at 2.75 V via the init_table;
drop stale qcom,micbias2-microvolt reference from the commit
message.
- Rebased on b-next-20260911.
[1] https://lore.kernel.org/all/20260907083727.733705-1-srinivas.kandagatla@oss.qualcomm.com/
Srinivas Kandagatla (8):
ASoC: SDCA: allow building without ACPI
ASoC: SDCA: export PM helpers keyed on sdca_class_drv
ASoC: SDCA: expose class SoundWire probe/remove as library
ASoC: SDCA: add class_ops with populate_function
ASoC: SDCA: class_function: xlate sound-dai cell by entity index
ASoC: SDCA: add sdca_apply_default_control_classifiers() helper
dt-bindings: sound: qcom: add Tambora WCD9378 SDCA codec
ASoC: codecs: add Qualcomm Tambora (WCD9378) SDCA codec
.../bindings/sound/qcom,wcd9378-sdw.yaml | 91 ++
include/sound/sdca.h | 23 +-
include/sound/sdca_class.h | 70 ++
include/sound/sdca_function.h | 2 +
sound/soc/codecs/Kconfig | 11 +
sound/soc/codecs/Makefile | 2 +
sound/soc/codecs/wcd9378-sdca.c | 1005 +++++++++++++++++
sound/soc/codecs/wcd9378-sdca.h | 20 +
sound/soc/codecs/wcd9378-sdw.c | 52 +
sound/soc/sdca/Kconfig | 6 +-
sound/soc/sdca/sdca_class.c | 148 ++-
sound/soc/sdca/sdca_class.h | 35 -
sound/soc/sdca/sdca_class_function.c | 45 +-
sound/soc/sdca/sdca_device.c | 4 +
sound/soc/sdca/sdca_functions.c | 31 +
15 files changed, 1474 insertions(+), 71 deletions(-)
create mode 100644 Documentation/devicetree/bindings/sound/qcom,wcd9378-sdw.yaml
create mode 100644 include/sound/sdca_class.h
create mode 100644 sound/soc/codecs/wcd9378-sdca.c
create mode 100644 sound/soc/codecs/wcd9378-sdca.h
create mode 100644 sound/soc/codecs/wcd9378-sdw.c
delete mode 100644 sound/soc/sdca/sdca_class.h
--
2.53.0