The Amlogic AXG SoC family has a downgraded VPU supporting only MIPI-DSI output
after it's ENCL DPI encoder output.
Signed-off-by: Neil Armstrong <narmstrong@xxxxxxxxxxxx>
---
.../bindings/display/amlogic,meson-vpu.yaml | 36 +++++++++++++++++--
1 file changed, 33 insertions(+), 3 deletions(-)
diff --git a/Documentation/devicetree/bindings/display/amlogic,meson-vpu.yaml b/Documentation/devicetree/bindings/display/amlogic,meson-vpu.yaml
index a8d202c9d004..e2e7d99d8ace 100644
--- a/Documentation/devicetree/bindings/display/amlogic,meson-vpu.yaml
+++ b/Documentation/devicetree/bindings/display/amlogic,meson-vpu.yaml
@@ -31,8 +31,10 @@ description: |
The Video Input Unit is in charge of the pixel scanout from the DDR memory.
It fetches the frames addresses, stride and parameters from the "Canvas" memory.
+ On the AXG family, the Video Input Unit direclty reads from DDR memory.
This part is also in charge of the CSC (Colorspace Conversion).
It can handle 2 OSD Planes and 2 Video Planes.
+ On the AXG family, only a single OSD plane without scalins is supported.
VPP: Video Post Processing
--------------------------
@@ -49,11 +51,13 @@ description: |
The VENC is composed of the multiple pixel encoders
- ENCI : Interlace Video encoder for CVBS and Interlace HDMI
- ENCP : Progressive Video Encoder for HDMI
- - ENCL : LCD LVDS Encoder
+ - ENCL : LCD DPI Encoder
The VENC Unit gets a Pixel Clocks (VCLK) from a dedicated HDMI PLL and clock
tree and provides the scanout clock to the VPP and VIU.
The ENCI is connected to a single VDAC for Composite Output.
The ENCI and ENCP are connected to an on-chip HDMI Transceiver.
+ On the AXG and G12A family, the ENCL is connected to a DPI-to-DSI
+ transceiver.
properties:
compatible:
@@ -65,6 +69,7 @@ properties:
- amlogic,meson-gxm-vpu # GXM (S912)
- const: amlogic,meson-gx-vpu
- enum:
+ - amlogic,meson-axg-vpu # AXG (A113D, A113X)
- amlogic,meson-g12a-vpu # G12A (S905X2, S905Y2, S905D2)
reg:
@@ -92,6 +97,11 @@ properties:
description:
A port node pointing to the HDMI-TX port node.
+ port@2:
+ type: object
+ description:
+ A port node pointing to the DPI port node.
+
"#address-cells":
const: 1
@@ -102,11 +112,31 @@ required:
- compatible
- reg
- interrupts
- - port@0
- - port@1
- "#address-cells"
- "#size-cells"
+allOf:
+ - if:
+ properties:
+ compatible:
+ enum:
+ - amlogic,meson-gx-vpu
+ - amlogic,meson-g12a-vpu
+
+ then:
+ required:
+ - port@0
+ - port@1
+ - if:
+ properties:
+ compatible:
+ enum:
+ - amlogic,meson-axg-vpu
+
+ then:
+ required:
+ - port@2
+
additionalProperties: false
examples:
--
2.22.0
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