[PATCH v6 02/12] dt-bindings: display: tegra: Document memory regions
From: Thierry Reding <thierry.reding@kernel.org>
Date: 2026-09-04 10:45:27
Also in:
dri-devel, linux-devicetree, linux-iommu, linux-media, linux-mm, linux-s390, linux-tegra, lkml
Subsystem:
drm drivers, drm drivers and misc gpu patches, drm drivers for nvidia tegra, open firmware and flattened device tree bindings, tegra video driver, the rest · Maintainers:
David Airlie, Simona Vetter, Maarten Lankhorst, Maxime Ripard, Thomas Zimmermann, Thierry Reding, Mikko Perttunen, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Jonathan Hunter, Sowjanya Komatineni, Luca Ceresoli, Linus Torvalds
From: Thierry Reding <redacted> Add the memory-region and memory-region-names properties to the bindings for the display controllers and the host1x engine found on various Tegra generations. These memory regions are used to access firmware-provided framebuffer memory as well as the video protection region. Reviewed-by: Rob Herring (Arm) <robh@kernel.org> Signed-off-by: Thierry Reding <redacted> --- Changes in v4: - typofix Changes in v3: - document properties for VIC --- .../devicetree/bindings/display/tegra/nvidia,tegra124-vic.yaml | 8 ++++++++ .../devicetree/bindings/display/tegra/nvidia,tegra186-dc.yaml | 10 ++++++++++ .../devicetree/bindings/display/tegra/nvidia,tegra20-dc.yaml | 10 +++++++++- .../bindings/display/tegra/nvidia,tegra20-host1x.yaml | 7 +++++++ 4 files changed, 34 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/display/tegra/nvidia,tegra124-vic.yaml b/Documentation/devicetree/bindings/display/tegra/nvidia,tegra124-vic.yaml
index bdf981781bd5..fdd3fe9e2547 100644
--- a/Documentation/devicetree/bindings/display/tegra/nvidia,tegra124-vic.yaml
+++ b/Documentation/devicetree/bindings/display/tegra/nvidia,tegra124-vic.yaml@@ -68,6 +68,14 @@ properties: - const: dma-mem # read - const: write + memory-region: + items: + - description: reference to the video protection memory region + + memory-region-names: + items: + - const: protected + dma-coherent: true additionalProperties: false
diff --git a/Documentation/devicetree/bindings/display/tegra/nvidia,tegra186-dc.yaml b/Documentation/devicetree/bindings/display/tegra/nvidia,tegra186-dc.yaml
index ce4589466a18..881bfbf4764d 100644
--- a/Documentation/devicetree/bindings/display/tegra/nvidia,tegra186-dc.yaml
+++ b/Documentation/devicetree/bindings/display/tegra/nvidia,tegra186-dc.yaml@@ -57,6 +57,16 @@ properties: - const: dma-mem # read-0 - const: read-1 + memory-region: + minItems: 1 + maxItems: 2 + + memory-region-names: + items: + enum: [ framebuffer, protected ] + minItems: 1 + maxItems: 2 + nvidia,outputs: description: A list of phandles of outputs that this display controller can drive.
diff --git a/Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-dc.yaml b/Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-dc.yaml
index 69be95afd562..3bf06dcd6198 100644
--- a/Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-dc.yaml
+++ b/Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-dc.yaml@@ -65,7 +65,15 @@ properties: items: - description: phandle to the core power domain - memory-region: true + memory-region: + minItems: 1 + maxItems: 2 + + memory-region-names: + items: + enum: [ framebuffer, protected ] + minItems: 1 + maxItems: 2 nvidia,head: $ref: /schemas/types.yaml#/definitions/uint32
diff --git a/Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-host1x.yaml b/Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-host1x.yaml
index 8312b7699cbe..420a1fe5ee80 100644
--- a/Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-host1x.yaml
+++ b/Documentation/devicetree/bindings/display/tegra/nvidia,tegra20-host1x.yaml@@ -98,6 +98,13 @@ properties: items: - description: phandle to the HEG or core power domain + memory-region: + maxItems: 1 + + memory-region-names: + items: + - const: protected + required: - compatible - interrupts
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2.55.0