On Thu, Oct 15, 2026 at 01:08:21PM +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 firmware transport, display topology, IOMMU contexts, and panel connections.
Due to dependencies this cannot be tested, so limited review.
A nit, subject: drop second/last, redundant "bindings". The "dt-bindings" prefix is already stating that these are bindings. See also: https://elixir.bootlin.com/linux/v7.1-rc7/source/Documentation/devicetree/bi...
Add bindings for the Qualcomm DCP VirtIO display function, including the INTF graph and DSI host outputs. Document the framebuffer IOMMU context, IPCC power-notify mailbox and interrupts, firmware display topology, and firmware-visible IOVA window supplied by the parent VirtIO-MMIO transport.
Signed-off-by: Jayant Shekhar jayant.shekhar@oss.qualcomm.com Assisted-by: LLM
.../bindings/display/msm/qcom,dcp-dsi.yaml | 75 +++++++++++++ .../bindings/display/msm/qcom,dcp-virtio.yaml | 113 +++++++++++++++++++ .../devicetree/bindings/display/msm/qcom,dcp.yaml | 119 +++++++++++++++++++++ 3 files changed, 307 insertions(+)
diff --git a/Documentation/devicetree/bindings/display/msm/qcom,dcp-dsi.yaml b/Documentation/devicetree/bindings/display/msm/qcom,dcp-dsi.yaml new file mode 100644 index 000000000000..f7178c66c09e --- /dev/null +++ b/Documentation/devicetree/bindings/display/msm/qcom,dcp-dsi.yaml @@ -0,0 +1,75 @@ +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/display/msm/qcom,dcp-dsi.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml#
+title: Qualcomm DCP DSI host
+maintainers:
- Jayant Shekhar jayant.shekhar@oss.qualcomm.com
+description: |
- A MIPI DSI host exposed by the Qualcomm DCP VirtIO device (see
- qcom,dcp.yaml). DCP is a firmware protocol shared across multiple
- Qualcomm SoCs, not specific to any one of them; Hawi is its first
- platform. The DSI host and its connection to a panel are described
- using the standard DSI controller and OF graph properties.
+allOf:
- $ref: /schemas/display/dsi-controller.yaml#
+properties:
- reg:
- maxItems: 1
- description: Index of this DSI host among its siblings.
- status: true
I see slop, I finished here. Mind this maintainers summit words - if you use AI, you must use good one, not the shloppy slop.
Best regards, Krzysztof