[GIT PULL] Mailbox fixes for v6.20

[Jassi Brar]

Hi Linus,
The following changes since commit e84d960149e71e8d5e4db69775ce31305898ed0c:

  Merge tag 'for-6.19-rc5-tag' of
git://git.kernel.org/pub/scm/linux/kernel/git/kdave/linux (2026-01-17
19:29:32 -0800)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/jassibrar/mailbox.git
tags/mailbox-v6.20

for you to fetch changes up to 75df94d05fc03fd9d861eaf79ce10fbb7a548bd8:

  mailbox: sprd: mask interrupts that are not handled (2026-02-01
18:59:52 -0600)

----------------------------------------------------------------
mailbox: platform and core updates

PCC
- Updates to transmission and interrupt handling, including
  dynamic txdone configuration, ->last_tx_done() wiring, and SHMEM
  initialization fixes. Reverted previous shared buffer patch.

MediaTek
- Introduce mtk-vcp-mailbox driver and bindings for MT8196 VCP.
- Expand mtk-cmdq for MT8196 with GCE virtualization, mminfra_offset,
  and instruction generation data.

Spreadtrum (SPRD)
- Add Mailbox Revision 2 support and UMS9230 bindings.
- Fix unhandled interrupt masking and TX done delivery flags.

Microchip
- Add pic64gx compatibility to MPFS.
- Fix out-of-bounds access and smatch warnings in mchp-ipc-sbi.

Core & Misc Platform Updates
- Prevent out-of-bounds access in fw_mbox_index_xlate().
- Add bindings for Qualcomm CPUCP (Kaanapali).
- Simplify mtk-cmdq and zynqmp-ipi with scoped OF child iterators.
- Consolidate various minor fixes, dead code removal, and typo
  corrections across Broadcom, NXP, Samsung, Xilinx, ARM, and
  core headers.

----------------------------------------------------------------
André Draszik (1):
      mailbox: exynos: drop unneeded runtime pointer (pclk)

Conor Dooley (1):
      mailbox: mpfs: drop POLARFIRE from ARCH_MICROCHIP_POLARFIRE

Geert Uytterhoeven (1):
      mailbox: Improve RISCV_SBI_MPXY_MBOX guidance

Harini T (1):
      dt-bindings: mailbox: xlnx,zynqmp-ipi-mailbox: Document msg
region requirement

Jacky Bai (1):
      mailbox: imx: Skip the suspend flag for i.MX7ULP

Jason-JH Lin (4):
      mailbox: mtk-cmdq: Add cmdq private data to cmdq_pkt for
generating instruction
      mailbox: mtk-cmdq: Add GCE hardware virtualization configuration
      mailbox: mtk-cmdq: Add mminfra_offset configuration for DRAM transaction
      mailbox: mtk-cmdq: Add driver data to support for MT8196

Jingyi Wang (1):
      dt-bindings: mailbox: qcom: Add CPUCP mailbox controller
bindings for Kaanapali

Jjian Zhou (2):
      dt-bindings: mailbox: mediatek,mt8196-vcp-mbox: add mtk vcp-mbox document
      mailbox: mediatek: Add mtk-vcp-mailbox driver

Joonwon Kang (1):
      mailbox: Prevent out-of-bounds access in fw_mbox_index_xlate()

Krzysztof Kozlowski (2):
      mailbox: mtk-cmdq: Simplify with scoped for each OF child loop
      mailbox: zynqmp-ipi: Simplify with scoped for each OF child loop

Kuninori Morimoto (1):
      mailbox: remove unneeded double quotation

Lakshmi S (2):
      mailbox: cix: fix typo in error message
      mailbox: arm_mhuv3: fix typo in comment

Mark Brown (1):
      mailbox: pcc: Remove spurious IRQF_ONESHOT usage

Otto Pflüger (4):
      dt-bindings: mailbox: sprd: add compatible for UMS9230
      mailbox: sprd: clear delivery flag before handling TX done
      mailbox: sprd: add support for mailbox revision 2
      mailbox: sprd: mask interrupts that are not handled

Peng Fan (1):
      mailbox: Remove mailbox_client.h from controller drivers

Pierre-Henry Moussay (1):
      dt-bindings: mbox: add pic64gx mailbox compatibility to mpfs mailbox

Sebastian Andrzej Siewior (1):
      mailbox: bcm-ferxrm-mailbox: Use default primary handler

Sudeep Holla (6):
      Revert "mailbox/pcc: support mailbox management of the shared buffer"
      mailbox: pcc: Wire up ->last_tx_done() for PCC channels
      mailbox: pcc: Set txdone_irq/txdone_poll based on PCCT flags
      mailbox: pcc: Mark Tx as complete in PCC IRQ handler
      mailbox: pcc: Initialize SHMEM before binding the channel with the client
      mailbox: pcc: Clear any pending responder interrupts before enabling it

Valentina Fernandez (2):
      mailbox: mchp-ipc-sbi: fix out-of-bounds access in
mchp_ipc_get_cluster_aggr_irq()
      mailbox: mchp-ipc-sbi: fix uninitialized symbol and other smatch warnings

 .../bindings/mailbox/mediatek,mt8196-vcp-mbox.yaml |  49 ++++++
 .../bindings/mailbox/microchip,mpfs-mailbox.yaml   |   6 +-
 .../bindings/mailbox/qcom,cpucp-mbox.yaml          |   1 +
 .../devicetree/bindings/mailbox/sprd-mailbox.yaml  |   1 +
 .../bindings/mailbox/xlnx,zynqmp-ipi-mailbox.yaml  |  11 ++
 drivers/mailbox/Kconfig                            |  17 ++-
 drivers/mailbox/Makefile                           |   2 +
 drivers/mailbox/arm_mhuv3.c                        |   2 +-
 drivers/mailbox/bcm-flexrm-mailbox.c               |  15 +-
 drivers/mailbox/cix-mailbox.c                      |   2 +-
 drivers/mailbox/cv1800-mailbox.c                   |   1 -
 drivers/mailbox/exynos-mailbox.c                   |   9 +-
 drivers/mailbox/imx-mailbox.c                      |   8 +-
 drivers/mailbox/mailbox-mchp-ipc-sbi.c             |  41 +++--
 drivers/mailbox/mailbox.c                          |   6 +-
 drivers/mailbox/mtk-cmdq-mailbox.c                 |  86 +++++++++--
 drivers/mailbox/mtk-vcp-mailbox.c                  | 170 +++++++++++++++++++++
 drivers/mailbox/omap-mailbox.c                     |   1 -
 drivers/mailbox/pcc.c                              | 120 +++------------
 drivers/mailbox/sprd-mailbox.c                     | 117 ++++++++++----
 drivers/mailbox/zynqmp-ipi-mailbox.c               |   5 +-
 include/acpi/pcc.h                                 |  29 ----
 include/linux/mailbox/mtk-cmdq-mailbox.h           |  19 +++
 include/linux/mailbox/mtk-vcp-mailbox.h            |  32 ++++
 24 files changed, 528 insertions(+), 222 deletions(-)
 create mode 100644
Documentation/devicetree/bindings/mailbox/mediatek,mt8196-vcp-mbox.yaml
 create mode 100644 drivers/mailbox/mtk-vcp-mailbox.c
 create mode 100644 include/linux/mailbox/mtk-vcp-mailbox.h