On Mon, 26 Oct 2026 11:51:11 +0530, Jayant Shekhar wrote:
> DCP platforms place the display pipeline under firmware control, so Linux
> cannot discover display resources through direct register access. The DRM
> driver therefore needs device-tree descriptions of the Qualcomm transport
> wrapper, display topology, IOMMU contexts, and panel connections.
>
> Add bindings for the Qualcomm DCP transport wrapper and VirtIO display
> subsystem. Document the IPCC power-notify resources, transport and
> framebuffer IOMMU contexts, firmware-visible IOVA range, INTF graph, and
> DSI panel connections. The wrapper creates a standard VirtIO-MMIO child
> after the IPCC power-notify sequence has completed.
>
> Assisted-by: LLM
> Signed-off-by: Jayant Shekhar <[email protected]>
> ---
> .../bindings/display/msm/qcom,dcp-dsi.yaml | 79 ++++++++++++
> .../devicetree/bindings/display/msm/qcom,dcp.yaml | 123 +++++++++++++++++++
> .../bindings/virtio/qcom,dcp-virtio.yaml | 132
> +++++++++++++++++++++
> 3 files changed, 334 insertions(+)
>
My bot found errors running 'make dt_binding_check' on your patch:
yamllint warnings/errors:
dtschema/dtc warnings/errors:
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/virtio/qcom,dcp-virtio.yaml:
iommu-ranges: multiple incompatible types: uint32-array
/usr/local/lib/python3.13/dist-packages/dtschema/schemas/iommu/iommu.yaml:
iommu-ranges: multiple incompatible types: uint32-matrix
Could not decode node virtio@9be8000 property iommu-ranges with value
b'\x00\x00\x00\x00\x84\x00\x00\x00\x00\x00\x00\x00\x04\x00\x00\x00'
Traceback (most recent call last):
File "/usr/local/bin/dt-validate", line 8, in <module>
sys.exit(main())
~~~~^^
File "/usr/local/lib/python3.13/dist-packages/dtschema/dtb_validate.py", line
443, in main
dtb_diagnostics = sg.check_dtb(filename)
File "/usr/local/lib/python3.13/dist-packages/dtschema/dtb_validate.py", line
331, in check_dtb
dt = self.validator.decode_dtb(f.read(), decode_errors)
File "/usr/local/lib/python3.13/dist-packages/dtschema/validator.py", line
631, in decode_dtb
return [dtschema.dtb.fdt_unflatten(self, dtb)]
~~~~~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^^^
File "/usr/local/lib/python3.13/dist-packages/dtschema/dtb.py", line 591, in
fdt_unflatten
dt = fdt_scan_node(validator, fdt, '/', offset)
File "/usr/local/lib/python3.13/dist-packages/dtschema/dtb.py", line 320, in
fdt_scan_node
node = fdt_scan_node(validator, fdt, nodename, offset)
File "/usr/local/lib/python3.13/dist-packages/dtschema/dtb.py", line 320, in
fdt_scan_node
node = fdt_scan_node(validator, fdt, nodename, offset)
File "/usr/local/lib/python3.13/dist-packages/dtschema/dtb.py", line 312, in
fdt_scan_node
node_dict = node_props(validator, fdt, nodename, offset)
File "/usr/local/lib/python3.13/dist-packages/dtschema/dtb.py", line 258, in
node_props
props_dict[p.name] = prop_value(validator, nodename, p)
~~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^
File "/usr/local/lib/python3.13/dist-packages/dtschema/dtb.py", line 185, in
prop_value
if len(p) / type_format[fmt].size >= min_dim:
~~~~~~~~~~~^^^^^
KeyError: 'uint32-array'
doc reference errors (make refcheckdocs):
See
https://patchwork.kernel.org/project/devicetree/patch/[email protected]
The base for the series is generally the latest rc1. A different dependency
should be noted in *this* patch.
If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:
pip3 install dtschema --upgrade
Please check and re-submit after running the above command yourself. Note
that DT_SCHEMA_FILES can be set to your schema file to speed up checking
your schema. However, it must be unset to test all examples with your schema.
