[PATCH v6 0/4] Add remoteproc PAS loader for SoCCP on Glymur DT

[Ananthu C V]

The SoC Control Processor (SoCCP) is a small RISC-V MCU that controls
USB Type-C, battery charging and various other functions on Qualcomm SoCs.
This series add the nodes required to enable SoCCP on Glymur/Mahua SoCs.

It also introduces the needs_tzmem flag which would cover for certain edge
cases by serving as an alternate trigger to the PAS helpers to ensure that
SHM bridge is established on SoCs running non-Gunyah based Hypervisors. This
change is required for SSR to work on SoCCP on Glymur.

Since Kaanapali SoCCP does not require or enable needs_tzmem, SoCCP falling
back to qcom,kaanapali-soccp-pas binding will break SSR on Glymur. Hence
qcom,glymur-soccp-pas is decoupled from the former and added standalone
(simply dropping the fallback would result in a dtbs_check failure).

We added SoCCP SSR verification support in diag upstream. SoCCP SSR on
Glymur can be triggered using the following commands using diag:
  error fatal: send_data 75 37 03 152 00
  wdog bite: send_data 75 37 03 152 01
  Software exception (Null pointer): send_data 75 37 03 152 02
  software exception (div by 0): send_data 75 37 03 152 03

/ # send_data 75 37 03 152 03
75 37 3 152
/ # qcom_q6v5_pas d00000.remoteproc: fatal error received: EX:idle:0x0xa90cc050:PC=0xa8eb5d8c:LR=0xa8fe5b3a:CAUSE=0xb:REASON=0x4
 remoteproc remoteproc0: crash detected in soccp: type fatal error
 qcom_q6v5_pas d00000.remoteproc: Handover signaled, but it already happened
 remoteproc remoteproc0: handling crash #4 in soccp
 remoteproc remoteproc0: recovering soccp
 ucsi_glink.pmic_glink_ucsi pmic_glink.ucsi.0: failed to send UCSI write request: -104
 remoteproc remoteproc0: stopped remote processor soccp
 usb 3-1: USB disconnect, device number 3
 usb 5-1: USB disconnect, device number 2
 r8152-cfgselector 5-1.3: USB disconnect, device number 3
 qcom_q6v5_pas d00000.remoteproc: Handover signaled, but it already happened
 debugfs: 'pmic_glink.ucsi.0' already exists in 'ucsi'
 remoteproc remoteproc0: remote processor soccp is now up

Signed-off-by: Ananthu C V <ananthu.cv@xxxxxxxxxxxxxxxx>
---
Changes in v6:
  - decoupled qcom,glymur-soccp-pas from qcom,kaanapali-soccp-pas and added it standalone
  - dropped qcom,kaanapali-soccp-pas fallback
  - dropped status = "okay" in glymur-crd.dtsi for remoteproc_soccp, as it is never disabled
  - picked up "Reviewed-by"
  - Link to v5: https://patch.msgid.link/20260707-glymur-soccp-v5-0-053993f0c6fe@xxxxxxxxxxxxxxxx

Changes in v5:
  - sorted soccp memory regions in ascending order
  - readded qcom,kaanapali-soccp-pas compatible as fallback
  - updated commit messages
  - Link to v4: https://patch.msgid.link/20260703-glymur-soccp-v4-0-b706c4c9b3e2@xxxxxxxxxxxxxxxx

Changes in v4:
  - dropped soccp from remoteproc node name
  - dropped status=disabled
  - added a new needs_tzmem flag in qcom_q6v5_pas platform driver, and added glymur_soccp_resource
    which uses the flag
  - dropped qcom,kaanapali-soccp-pas compatible, due to the kaanapali_soccp_resource not having the
    needs_tzmem flag enabled
  - fixed memory region mappings for glymur soccp
  - Link to v3: https://lore.kernel.org/lkml/20260403-glymur-soccp-v3-1-f0e8d57f11ba@xxxxxxxxxxxxxxxx

Changes in v3:
  - dropped smp2p nodes which are already merged, and adsp and cdsp nodes
  - updated interrupts-extended (dropped  <&soccp_smp2p_in 10 IRQ_TYPE_EDGE_RISING>), interrupt-names
    (dropped wake-ack), smem-states (dropped <&soccp_smp2p_out 10>, <&soccp_smp2p_out 9>), and
    smem-state-names (dropped wakeup, sleep)
  - fixed IPCC names, GLYMUR_MPROC_SOCCP -> IPCC_MPROC_SOCCP
  - Link to v2: https://lore.kernel.org/lkml/20250925-v3_glymur_introduction-v2-24-8e1533a58d2d@xxxxxxxxxxxxxxxx/

Changes in v2:
  - None related to soccp
  - Link to v1: https://lore.kernel.org/r/20250925-v3_glymur_introduction-v1-0-5413a85117c6@xxxxxxxxxxxxxxxx

---
Ananthu C V (3):
      dt-bindings: remoteproc: qcom: move glymur SoCCP pas to standalone
      remoteproc: qcom: pas: add needs_tzmem flag to trigger shmbridge creation
      arm64: dts: qcom: fix SoCCP memory mappings for Glymur

Sibi Sankar (1):
      arm64: dts: qcom: add SoCCP DT node for Glymur

 .../remoteproc/qcom,kaanapali-soccp-pas.yaml       |  2 +-
 arch/arm64/boot/dts/qcom/glymur-crd.dtsi           |  5 +++
 arch/arm64/boot/dts/qcom/glymur.dtsi               | 52 ++++++++++++++++++++--
 drivers/remoteproc/qcom_q6v5_pas.c                 | 24 +++++++++-
 4 files changed, 76 insertions(+), 7 deletions(-)
---
base-commit: 6eb8711ece2ce27e52e327a5b7a628ed39b97f45
change-id: 20260702-glymur-soccp-8f50d947f601

Best regards,
--  
Ananthu C V <ananthu.cv@xxxxxxxxxxxxxxxx>