On Sun, Apr 25, 2021 at 08:36:02PM +0800, Kevin Tang wrote: > From: Kevin Tang <kevin.tang@xxxxxxxxxx> > > The Unisoc DRM master device is a virtual device needed to list all > DPU devices or other display interface nodes that comprise the > graphics subsystem > > Unisoc's display pipeline have several components as below > description, multi display controllers and corresponding physical > interfaces. > For different display scenarios, dpu0 and dpu1 maybe binding to > different encoder. > > E.g: > dpu0 and dpu1 both binding to DSI for dual mipi-dsi display; > dpu0 binding to DSI for primary display, and dpu1 binding to DP for > external display; > > Cc: Orson Zhai <orsonzhai@xxxxxxxxx> > Cc: Chunyan Zhang <zhang.lyra@xxxxxxxxx> > Signed-off-by: Kevin Tang <kevin.tang@xxxxxxxxxx> > Reviewed-by: Rob Herring <robh@xxxxxxxxxx> > --- > .../display/sprd/sprd,display-subsystem.yaml | 64 +++++++++++++++++++ > 1 file changed, 64 insertions(+) > create mode 100644 Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml > > diff --git a/Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml b/Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml > new file mode 100644 > index 000000000..3d107e943 > --- /dev/null > +++ b/Documentation/devicetree/bindings/display/sprd/sprd,display-subsystem.yaml > @@ -0,0 +1,64 @@ > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) > +%YAML 1.2 > +--- > +$id: http://devicetree.org/schemas/display/sprd/sprd,display-subsystem.yaml# > +$schema: http://devicetree.org/meta-schemas/core.yaml# > + > +title: Unisoc DRM master device > + > +maintainers: > + - Kevin Tang <kevin.tang@xxxxxxxxxx> > + > +description: | > + The Unisoc DRM master device is a virtual device needed to list all > + DPU devices or other display interface nodes that comprise the > + graphics subsystem. > + > + Unisoc's display pipeline have several components as below description, > + multi display controllers and corresponding physical interfaces. > + For different display scenarios, dpu0 and dpu1 maybe binding to different > + encoder. > + > + E.g: > + dpu0 and dpu1 both binding to DSI for dual mipi-dsi display; > + dpu0 binding to DSI for primary display, and dpu1 binding to DP for external display; > + > + +-----------------------------------------+ > + | | > + | +---------+ | > + +----+ | +----+ +---------+ |DPHY/CPHY| | +------+ > + | +----->+dpu0+--->+MIPI|DSI +--->+Combo +----->+Panel0| > + |AXI | | +----+ +---------+ +---------+ | +------+ > + | | | ^ | > + | | | | | > + | | | +-----------+ | > + | | | | | > + |APB | | +--+-+ +-----------+ +---+ | +------+ > + | +----->+dpu1+--->+DisplayPort+--->+PHY+--------->+Panel1| > + | | | +----+ +-----------+ +---+ | +------+ > + +----+ | | > + +-----------------------------------------+ > + > +properties: > + compatible: > + const: sprd,display-subsystem > + > + ports: > + $ref: /schemas/types.yaml#/definitions/phandle-array > + description: > + Should contain a list of phandles pointing to display interface port > + of DPU devices. > + > +required: > + - compatible > + - ports > + > +additionalProperties: false > + > +examples: > + - | > + display-subsystem { > + compatible = "sprd,display-subsystem"; > + ports = <&dpu_out>; > + }; Given your diagram, I guess it should be the dpu input? Maxime
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