diff options
| author | Mark Brown <broonie@kernel.org> | 2026-03-02 16:35:21 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2026-03-02 16:35:21 +0300 |
| commit | 727d1a1c4eb272164a84d4400dddcdf26ecf502a (patch) | |
| tree | aef6a130326beb8307ccbd71509643e4e3ce6b52 /include/linux | |
| parent | a8fd392f6e3ad33b87dfdb6d438f05c5bc29d2e6 (diff) | |
| parent | 17c6bf433742e0c1ff5ce175145877c0194e4a7a (diff) | |
| download | linux-727d1a1c4eb272164a84d4400dddcdf26ecf502a.tar.xz | |
Support wm_adsp hibernation for runtime suspend
Merge series from Stefan Binding <sbinding@opensource.cirrus.com>:
When the CS35L41 and CS35L45 drivers suspend, they are put into
hibernation, and the regmap goes into cache_only, but the firmware is
still running, and wm_adsp is not stopped. If userspace attempts to
read a firmware control, it will perform a regmap_raw_read() and this
will produce an error in the kernel log.
To prevent these spurious errors, add an apis into cs_dsp and wm_adsp
to allow wm_adsp to hibernate. In this hibernation mode, reads or
writes to the dsp controls would be rejected with -EPERM rather than
-EBUSY, and no error will be printed to the kernel log.
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/firmware/cirrus/cs_dsp.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/linux/firmware/cirrus/cs_dsp.h b/include/linux/firmware/cirrus/cs_dsp.h index 0ec1cdc5585d..4e3baa557068 100644 --- a/include/linux/firmware/cirrus/cs_dsp.h +++ b/include/linux/firmware/cirrus/cs_dsp.h @@ -179,6 +179,7 @@ struct cs_dsp { bool booted; bool running; + bool hibernating; struct list_head ctl_list; @@ -354,4 +355,6 @@ int cs_dsp_chunk_write(struct cs_dsp_chunk *ch, int nbits, u32 val); int cs_dsp_chunk_flush(struct cs_dsp_chunk *ch); int cs_dsp_chunk_read(struct cs_dsp_chunk *ch, int nbits); +void cs_dsp_hibernate(struct cs_dsp *dsp, bool hibernating); + #endif |