[PATCH v4 1/2] dt-bindings: display: samsung,exynos7-decon: document iommus, memory-region, and ports
From: Kaustabh Chakraborty <hidden>
Date: 2025-07-06 17:30:11
Also in:
dri-devel, linux-devicetree, linux-samsung-soc, lkml
Subsystem:
drm drivers, drm drivers and misc gpu patches, drm drivers for exynos, open firmware and flattened device tree bindings, the rest · Maintainers:
David Airlie, Simona Vetter, Maarten Lankhorst, Maxime Ripard, Thomas Zimmermann, Inki Dae, Seung-Woo Kim, Kyungmin Park, Rob Herring, Krzysztof Kozlowski, Conor Dooley, Linus Torvalds
Similar to FIMD and Exynos5433's DECON, the Exynos7 DECON hardware: - May optionally require an IOMMU to initialize a display region. - Outputs image data to another block, say an MIC or a DSI master. If an IOMMU is present, it may also require to access the reserved framebuffer region. Document these bindings in the devicetree schema. Signed-off-by: Kaustabh Chakraborty <redacted> --- .../display/samsung/samsung,exynos7-decon.yaml | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+)
diff --git a/Documentation/devicetree/bindings/display/samsung/samsung,exynos7-decon.yaml b/Documentation/devicetree/bindings/display/samsung/samsung,exynos7-decon.yaml
index 53916e4c95d8c0369138941a556c23f5d42fbd39..14b954718008e06aa1627fcd116a61927ce29e99 100644
--- a/Documentation/devicetree/bindings/display/samsung/samsung,exynos7-decon.yaml
+++ b/Documentation/devicetree/bindings/display/samsung/samsung,exynos7-decon.yaml@@ -80,6 +80,21 @@ properties: - const: vsync - const: lcd_sys + iommus: + maxItems: 1 + + memory-region: + maxItems: 1 + description: + A phandle to a node describing a reserved framebuffer memory region. + For example, the splash memory region set up by the bootloader. + + port: + $ref: /schemas/graph.yaml#/properties/port + description: + Output port which is connected to either a Mobile Image Compressor + (MIC) or a DSI Master device. + power-domains: maxItems: 1
@@ -92,6 +107,7 @@ required: - clock-names - interrupts - interrupt-names + - port - reg additionalProperties: false
@@ -118,4 +134,9 @@ examples: "decon0_vclk"; pinctrl-0 = <&lcd_clk &pwm1_out>; pinctrl-names = "default"; + port { + decon_to_dsi: endpoint { + remote-endpoint = <&dsi_to_decon>; + }; + }; };
--
2.49.0