Hi,
Can I please get comments about adding new vendor prefix "xylon", and on
following devicetree binding for Xylon configurable video controller (logiCVC).
Shown node is prepared for Xilinx Linux kernel dts file.
logicvc_0: logicvc@40030000 {
compatible = "xylon,logicvc-4.00.a";
reg = <0x40030000 0x6000>;
interrupt-parent = <&ps7_scugic_0>;
interrupts = <0 59 4>;
background-layer-bits-per-pixel = <32>;
display-interface = <0>;
display-color-space = <1>;
is-readable-regs = <1>;
is-size-position = <1>;
layer-width = <2048>;
num-layers = <4>;
layer_0 {
address = <0>;
alpha-mode = <0>;
data-width = <16>;
type = <0>;
} ;
layer_1 {
address = <0>;
alpha-mode = <0>;
data-width = <32>;
type = <0>;
} ;
layer_2 {
address = <0>;
alpha-mode = <1>;
data-width = <32>;
type = <0>;
} ;
layer_3 {
address = <0>;
alpha-mode = <0>;
data-width = <16>;
type = <1>;
} ;
} ;
Required properties for configuring logiCVC device:
- compatible: value must be "xylon,logicvc-4.00.a"
- reg: base address and size of the logiCVC IP
- interrupts-parent: the phandle for interrupt controller
- interrupts: the interrupt number
- background-layer-bits-per-pixel: background layer color format (0, 16, 32)
if "0" last available layer is standard layer
if 16 or 32, last available layer is background layer implemented in
hw register and containing specified bits per pixel color value
- display-interface: logiCVC to display physical interface
(0=Parallel, 1=ITU656)
- display-color-space: logiCVC to display physical color space
(0=RGB, 1=YCbCr 4:2:2, 2=YCbCr 4:4:4)
- is-readable-regs: all hw registers are readable by sw
- is-size-position: hw changing of layer size and position
- layer-width: layer width in pixels, common for all layers
- num-layers: supported number of layers (1-5)
if "background-layer-bits-per-pixel != 0", "num-layers" property value is
decreased by 1
- layer_N
- address: layer address hardcoded in hw (0=Unused, 0x...)
- alpha-mode: layer transparency mode (0=Layer, 1=Pixel)
layer alpha mode contains single alpha value for all layer pixels
pixel alpha mode contains alpha value per pixel in video memory
pixel alpha mode can increase physical size of pixel in memory
(8 bits per pixel in pixel alpha mode uses 16 bits per pixel in
memory)
- data-width: layer bits per pixel color format (16, 32)
- type: layer type (0=RGB, 1=YCbCr)
Thank you,
Davor
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