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Subject[PATCH v4 03/11] dt-bindings: add bindings for DE2 on V3s SoC
Date
Allwinner V3s SoC have a display engine which have a different pipeline
with older SoCs.

Add document for it (new compatibles and the new "mixer" part).

Signed-off-by: Icenowy Zheng <icenowy@aosc.io>
---
Changes in v4:
- Removed the refactor at TCON chapter.

Changes in v3:
- Remove the description of having a BE directly as allwinner,pipeline.

.../bindings/display/sunxi/sun4i-drm.txt | 29 ++++++++++++++++++++--
1 file changed, 27 insertions(+), 2 deletions(-)

diff --git a/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt b/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
index 57a8d0610062..7da80e26d61b 100644
--- a/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
+++ b/Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt
@@ -31,6 +31,7 @@ Required properties:
* allwinner,sun6i-a31-tcon
* allwinner,sun6i-a31s-tcon
* allwinner,sun8i-a33-tcon
+ * allwinner,sun8i-v3s-tcon
- reg: base address and size of memory-mapped region
- interrupts: interrupt associated to this IP
- clocks: phandles to the clocks feeding the TCON. Three are needed:
@@ -52,7 +53,7 @@ Required properties:
second the block connected to the TCON channel 1 (usually the TV
encoder)

-On SoCs other than the A33, there is one more clock required:
+On SoCs other than the A33 and V3s, there is one more clock required:
- 'tcon-ch1': The clock driving the TCON channel 1

DRC
@@ -138,6 +139,26 @@ Required properties:
Documentation/devicetree/bindings/media/video-interfaces.txt. The
first port should be the input endpoints, the second one the outputs

+Display Engine 2.0 Mixer
+------------------------
+
+The DE2 mixer have many functionalities, currently only layer blending is
+supported.
+
+Required properties:
+ - compatible: value must be one of:
+ * allwinner,sun8i-v3s-de2-mixer
+ - reg: base address and size of the memory-mapped region.
+ - clocks: phandles to the clocks feeding the frontend and backend
+ * bus: the backend interface clock
+ * ram: the backend DRAM clock
+ - clock-names: the clock names mentioned above
+ - resets: phandles to the reset controllers driving the backend
+
+- ports: A ports node with endpoint definitions as defined in
+ Documentation/devicetree/bindings/media/video-interfaces.txt. The
+ first port should be the input endpoints, the second one the output
+

Display Engine Pipeline
-----------------------
@@ -152,9 +173,13 @@ Required properties:
* allwinner,sun6i-a31-display-engine
* allwinner,sun6i-a31s-display-engine
* allwinner,sun8i-a33-display-engine
+ * allwinner,sun8i-v3s-display-engine

- allwinner,pipelines: list of phandle to the display engine
- frontends available.
+ pipeline entry point. For SoCs with original DE (currently
+ all SoCs supported by display engine except V3s), this
+ phandle should be a display frontend; for SoCs with DE2,
+ this phandle should be a mixer.

Example:

--
2.12.2
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