[PATCH v16 00/16] accel/rocket: RK3576 NPU (RKNN) enablement

[Jiaxing Hu <gahing@gahingwoo.com>]

This series adds RK3576 NPU (RKNN) support to the mainline DRM rocket
driver.

Based on: next-20261105

Changes in v16:

- Tomeu: rewrote the descriptions and code comments of the accel/rocket
  patches; I write them in Chinese first and translate them into English
  with an LLM. Added a GET_PARAM ioctl that gives userspace the NPU
  hardware version (13/16). Please check whether the proposed enum values
  are fine (RK3588 = 1, RK3576 = 2).
- Heiko: shortened the commit messages of 1/16 and 3/16 and kept the
  original comment in 3/16; moved to one power domain per core, and cut
  the IOMMU clocks from five to four. The measurements are in 8/16 and
  15/16.
- Chaoyi: removed the unneeded comment in 11/16.
- Sashiko: 4/16 now drops the runtime PM reference after
  rocket_core_reset(), with an A/B test showing that the old order hangs
  the board.

Testing, on a ROCK 4D and an ArmSoM CM5-IO, both running Armbian edge 7.3
with the v16 changes:

- Tested with charsiu (https://github.com/gahingwoo/charsiu), an open
  source LLM inference runtime. It drives the NPU directly through the
  rocket UAPI (/dev/accel), without Mesa or the vendor runtime.
- Llama-3.2-1B (Q4_0), with both NPU cores running together, gives
  correct results.
- Perplexity on the same model and the same text is 41.1009, identical to
  the previous version.
- On the ROCK 4D, tested IOMMU clock combinations; four clocks are needed.
- On the ROCK 4D, repeated resets with a 2 ms job timeout, to compare the
  two orders of dropping the runtime PM reference.

Armbian has merged support based on v14, in armbian/build#11162
and armbian/build#11163.

Known issue: after repeated resets with a 2 ms job timeout, the IOMMU
does not recover ("MMU_DTE_ADDR is not functioning"). I have not looked
into it further.

Tool use:

An LLM helped me read code and technical material and write part of the
implementation. Some of the code in the series was first drafted by an
LLM, and the commit messages and cover letters of earlier versions were
mostly written by an LLM.

I reviewed the generated code and tested the changes on real hardware.
I also used an LLM to write test scripts and to compare register write
traces.

For v16 I rewrote the cover letter, commit messages and code comments
myself in Chinese first and translated them into English with an LLM.

Tag changes:

- Picked up Heiko's Reviewed-by tags from v15.
- 4/16 changed after Heiko's Reviewed-by. Heiko, please confirm whether
  it still applies.
- Igor's Tested-by on 4/16 was given on the earlier code, so I've dropped
  it until it is retested.
- 8/16 has Conor's Acked-by. The clock count changed from five to four;
  Conor, please confirm whether it still applies.

Igor Paunovic (1):
  accel/rocket: request the core clocks by name

Jiaxing Hu (15):
  accel/rocket: take the completion register writes under job_lock
  accel/rocket: wait for a running IRQ handler before resetting a core
  accel/rocket: let the core suspend after a reset
  accel/rocket: factor the completion tail out of the IRQ handler
  dt-bindings: npu: rockchip: add rockchip,rk3576-rknn-core
  dt-bindings: power: rockchip: allow resets in a power domain node
  dt-bindings: iommu: rockchip: describe the RK3576 NPU MMU
  pmdomain: rockchip: add optional per-domain power-on settle delay
  pmdomain: rockchip: cycle an optional power-domain reset on power-on
  accel/rocket: select the per-core clock and reset counts from match
    data
  accel/rocket: add RK3576 NPU (RKNN) support
  accel/rocket: add a GET_PARAM ioctl for the hardware version
  arm64: dts: rockchip: add NPU core domain clocks and resets to rk3576
  arm64: dts: rockchip: add NPU (RKNN) nodes to rk3576
  arm64: dts: rockchip: enable the NPU on rk3576-rock-4d

 .../bindings/iommu/rockchip,iommu.yaml        | 26 ++++++
 .../npu/rockchip,rk3588-rknn-core.yaml        | 40 ++++++++-
 .../power/rockchip,power-controller.yaml      |  8 ++
 .../boot/dts/rockchip/rk3576-rock-4d.dts      | 22 +++++
 arch/arm64/boot/dts/rockchip/rk3576.dtsi      | 82 ++++++++++++++++-
 drivers/accel/rocket/rocket_core.c            | 14 ++-
 drivers/accel/rocket/rocket_core.h            | 10 ++-
 drivers/accel/rocket/rocket_device.c          |  3 +-
 drivers/accel/rocket/rocket_drv.c             | 61 +++++++++++--
 drivers/accel/rocket/rocket_drv.h             |  2 +
 drivers/accel/rocket/rocket_job.c             | 84 ++++++++++++-----
 drivers/pmdomain/rockchip/pm-domains.c        | 89 ++++++++++++++-----
 include/uapi/drm/rocket_accel.h               | 40 +++++++++
 13 files changed, 419 insertions(+), 62 deletions(-)


base-commit: ddfe51b0a0f5dc9e415cc2c8ad8db17532dd426b
-- 
2.43.0