[PATCH v5 00/18] Imagination BXS-4-64 MC1 GPU support

[Matt Coster <matt.coster@imgtec.com>]

This GPU is found in the TI AM68 family of SoCs, with initial support
added to the k3-j721s2 devicetree and tested on a TI SK-AM68 board.

A suitable firmware binary can currently be found in the IMG
linux-firmware repository[1] as powervr/rogue_36.53.104.796_v1.fw.

No new UAPI will be necessary for this platform as it is sufficiently
similar to the already supported AXE-1-16M.

UMD support is close to being complete. We're now able to pass >95% of
Vulkan conformance on our Mesa development branch. The compiler has been
undergoing a significant rework needed to accomodate the BXS-4-64, as
well as to make it more flexible to support additional Rogue GPUs going
forward. The first part of this rework landed in Mesa in [2], and the
next chunk is currently in review in [3].

There are several dt-bindings changes at the beginning of this series.
We expect the result to be versatile enough to handle all Imagination
Rogue GPUs while being a strong foundation to build bindings for the
newer Volcanic architecture (for which we're currently developing
support).

The DTS changes at the end of the series are marked [DO NOT MERGE]. Once
the series is reviewed, we will request these be taken through the
relevant tree.

This version of the series depends on a patch[4] which exists in
drm-misc-fixes, but has not yet made it back to drm-misc-next (the
target of this series). That patch adds the function pvr_vm_unmap_obj()
which is used in patch 14 ("drm/imagination: Add RISC-V firmware
processor support").

[1]: https://gitlab.freedesktop.org/imagination/linux-firmware/-/tree/powervr
[2]: https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/32258
[3]: https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/33998
[4]: https://lore.kernel.org/r/20250226-hold-drm_gem_gpuva-lock-for-unmap-v2-1-3fdacded227f@imgtec.com

---
Changes in v5:
- Remove extraneous (and error-causing) power-domains minItems
  constraint (P1)
- Replace anyOf/const with enum (P2)
- Link to v4: https://lore.kernel.org/r/20250320-sets-bxs-4-64-patch-v1-v4-0-d987cf4ca439@imgtec.com

Changes in v4:
- Update status of UMD support (cover)
- Fix backwards compatibility of new compatible strings (P1)
- Fix power-domains property constraints (P1/P2)
- Fix power-domain-names property constraints (P2)
- Only invoke pvr_device_safety_irq_clear() if has_safety_events is set
  (P7)
- Use pvr_vm_unmap_obj() in pvr_riscv_vm_unmap() (P14)
- Fix formatting of pvr_riscv_fw_process() signature (P14)
- Link to v3: https://lore.kernel.org/r/20250310-sets-bxs-4-64-patch-v1-v3-0-143b3dbef02f@imgtec.com

Changes in v3:
- Reorder some patches to ensure the proper sequencing
- Update status of UMD support (cover)
- Don't use more specific compatible strings when not required (P1)
- Avoid ABI break by limiting new required properties to new compatible
  strings (P2)
- Move power domain changes to the patch in which they're used (P2/P5)
- Update register definitions (P3) [Thanks, Alessio!]
- Don't use more specific compatible strings when not required (P4)
- Enhanced commit messages (P4)
- Remove unnecessary example (P5)
- Add proper fixes for threaded IRQs (P6) [Thanks, Alessio!]
- Include fix for a separate IRQ issue (P7) [Thanks, Alessio!]
- Don't enable firmware debug module (was P13 in v2, also in P14)
- Change from a workaround to a regular codepath (P15)
- Drop platform overrides framework (was P18 in v2, also in P16)
- Mark DTS changes [DO NOT MERGE] (P17/P18)
- Link to v2: https://lore.kernel.org/r/20241118-sets-bxs-4-64-patch-v1-v2-0-3fd45d9fb0cf@imgtec.com

Changes in v2:
- Clarified justification for compatible strings (P1)
- Simplified clocks constraints (P2)
- Simplified power-domains constraints (P3/P4)
- Use normal reg syntax for 64-bit values (P8/P21)
- Link to v1: https://lore.kernel.org/r/20241105-sets-bxs-4-64-patch-v1-v1-0-4ed30e865892@imgtec.com

---
Alessio Belle (3):
      drm/imagination: Update register defs for newer GPUs
      drm/imagination: Mask GPU IRQs in threaded handler
      drm/imagination: Handle Rogue safety event IRQs

Matt Coster (14):
      dt-bindings: gpu: img: Future-proofing enhancements
      dt-bindings: gpu: img: Add BXS-4-64 devicetree bindings
      drm/imagination: Use new generic compatible string
      drm/imagination: Add power domain control
      drm/imagination: Remove firmware enable_reg
      drm/imagination: Rename event_mask -> status_mask
      drm/imagination: Make has_fixed_data_addr a value
      drm/imagination: Use a lookup table for fw defs
      drm/imagination: Use callbacks for fw irq handling
      drm/imagination: Move ELF fw utils to common file
      drm/imagination: Use cached memory with dma_coherent
      drm/imagination: Add support for TI AM68 GPU
      [DO NOT MERGE] arm64: dts: ti: k3-am62: New GPU binding details
      [DO NOT MERGE] arm64: dts: ti: k3-j721s2: Add GPU node

Sarah Walker (1):
      drm/imagination: Add RISC-V firmware processor support

 .../devicetree/bindings/gpu/img,powervr-rogue.yaml |  81 +++++++++-
 arch/arm64/boot/dts/ti/k3-am62-main.dtsi           |   4 +-
 arch/arm64/boot/dts/ti/k3-j721s2-main.dtsi         |  12 ++
 drivers/gpu/drm/imagination/Makefile               |   2 +
 drivers/gpu/drm/imagination/pvr_device.c           | 126 ++++++++++++++--
 drivers/gpu/drm/imagination/pvr_device.h           |  31 +++-
 drivers/gpu/drm/imagination/pvr_drv.c              |  16 ++
 drivers/gpu/drm/imagination/pvr_fw.c               |  28 +++-
 drivers/gpu/drm/imagination/pvr_fw.h               |  85 +++++------
 drivers/gpu/drm/imagination/pvr_fw_meta.c          |  23 +--
 drivers/gpu/drm/imagination/pvr_fw_mips.c          |  82 ++--------
 drivers/gpu/drm/imagination/pvr_fw_riscv.c         | 165 +++++++++++++++++++++
 drivers/gpu/drm/imagination/pvr_fw_startstop.c     |  17 +++
 drivers/gpu/drm/imagination/pvr_fw_util.c          |  67 +++++++++
 drivers/gpu/drm/imagination/pvr_gem.c              |  10 +-
 drivers/gpu/drm/imagination/pvr_gem.h              |   6 +-
 drivers/gpu/drm/imagination/pvr_mmu.c              |   8 +-
 drivers/gpu/drm/imagination/pvr_power.c            | 114 ++++++++++++++
 drivers/gpu/drm/imagination/pvr_power.h            |   3 +
 drivers/gpu/drm/imagination/pvr_rogue_cr_defs.h    | 153 ++++++++++++++++---
 drivers/gpu/drm/imagination/pvr_rogue_riscv.h      |  41 +++++
 21 files changed, 896 insertions(+), 178 deletions(-)
---
base-commit: 95f9bc4e0bc812541a7007a29e0de0c5d2a98e12
change-id: 20241021-sets-bxs-4-64-patch-v1-44cdf9cc555f