[PATCH v2 0/4] Support partitioned Host1x

[Mikko Perttunen <mperttunen@nvidia.com>]

The resources (channels, syncpoints) provided by Host1x can be split 
into multiple independent partitions similar to e.g. PCIe VFs, which can 
be assigned to virtual machines, non-CPU embedded controllers, or other 
bus masters.

Each partition has its own MMIO register region and interrupts through 
which the set of channels and syncpoints assigned to it can be accessed. 
This set is configured via the hypervisor MMIO region earlier during 
boot.

This series adds device tree bindings and support in the driver to 
function when Host1x has been partitioned in this way, by making the 
driver work without access to the hypervisor region and with a limited 
set of channels and syncpoints.

Signed-off-by: Mikko Perttunen <mperttunen@nvidia.com>
---
Changes in v2:
- Updated commit messages to clarify software view of registers
- Minor rewording of schema description for channels/syncpoints
  properties
- Rebased on v7.2-rc1
- Link to v1: https://patch.msgid.link/20260622-host1x-nohv-v1-0-65bc682a617f@nvidia.com

---
Mikko Perttunen (4):
      dt-bindings: display: tegra: Make non-vm registers optional
      dt-bindings: display: tegra: Add channel/syncpoint range properties
      gpu: host1x: Support running without hv/common registers
      gpu: host1x: Allow limiting usable channel and syncpoint ranges

 .../display/tegra/nvidia,tegra20-host1x.yaml       | 52 ++++++++++++++++------
 drivers/gpu/host1x/channel.c                       |  6 +--
 drivers/gpu/host1x/dev.c                           | 52 +++++++++++++++++++---
 drivers/gpu/host1x/dev.h                           |  3 ++
 drivers/gpu/host1x/hw/cdma_hw.c                    |  3 ++
 drivers/gpu/host1x/hw/debug_hw_1x06.c              |  3 ++
 drivers/gpu/host1x/syncpt.c                        | 21 +++++----
 7 files changed, 110 insertions(+), 30 deletions(-)
---
base-commit: dc59e4fea9d83f03bad6bddf3fa2e52491777482
change-id: 20250919-host1x-nohv-071ed7c6ac4f