[PATCH v3 0/3] remoteproc: Hawi CDSP support with per-PD

[Mukesh Ojha]

qcom,hawi-cdsp-pas was initially grouped as a fallback to
qcom,sm8550-cdsp-pas on the hardware-level compatibility.  Bringup revealed
that the NSP proxy power domain on Hawi requires a specific RPMH
performance level below what sm8550 already supports, breaking the
compatibility contract the fallback string implies. Remove
qcom,hawi-cdsp-pas from the sm8550-cdsp-pas fallback items block, add it to
the standalone compatible enum, and extend the existing cx/mxc/nsp
power-domain constraint to cover it explicitly.

The fix is two-part: first, propagate the dev_pm_genpd_set_performance_state()
return value so the failure becomes visible instead of silently proceeding
with firmware load. Second, introduce a per-PD performance state table in
qcom_pas_data so platforms can declare explicit RPMH levels for each proxy
domain. Platforms that omit the table retain the existing INT_MAX behaviour.
Hawi CDSP declares CX/MXC at TURBO and NSP at NOM, matching the hardware
requirement.

The binding and DTS are updated in tandem: qcom,hawi-cdsp-pas is made a
standalone compatible (dropped from the sm8550-cdsp-pas fallback group)
because the proxy PD behaviour diverges from sm8550, breaking the
compatibility contract the fallback string implies.

---
Changes in v3:
 - Converted warn into failure in 1/3 as per review.
 - Added R-b tag.
 - Link to v2:
   https://lore.kernel.org/lkml/20260902204334.2061226-1-mukesh.ojha@xxxxxxxxxxxxxxxx/

Changes in v2:
  - Propagating the err dev_pm_genpd_set_performance_state() as a
    separate commit.
  - Added a binding correction for hawi as it  should be
    standalone one instead of falling back to sm8550.
  - Add num_proxy_pd_performance_states count field with a
    WARN_ON in
    probe to catch mismatch between the array size and the actual
proxy
    PD count at boot time, returning -EINVAL if they diverge.
  - [v1]
    https://lore.kernel.org/lkml/20260828181311.4038346-3-mukesh.ojha@xxxxxxxxxxxxxxxx/


Mukesh Ojha (3):
  remoteproc: qcom_q6v5_pas: propagate
    dev_pm_genpd_set_performance_state() errors
  dt-bindings: remoteproc: qcom,sm8550-pas: make qcom,hawi-cdsp-pas
    standalone
  remoteproc: qcom_q6v5_pas: add per-PD proxy performance states for
    Hawi CDSP

 .../bindings/remoteproc/qcom,sm8550-pas.yaml  |  3 +-
 drivers/remoteproc/qcom_q6v5_pas.c            | 54 ++++++++++++++++++-
 2 files changed, 55 insertions(+), 2 deletions(-)

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2.55.0