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Message-ID: <facd04b5-0494-42cd-bea7-1d43f8df4b54@mail.xylon.local>
Date: Fri, 17 Oct 2014 15:07:01 +0200
From: Davor Joja <davorjoja@...icbricks.com>
To: <linux-kernel@...r.kernel.org>
CC: Davor Joja <davorjoja@...icbricks.com>
Subject: [PATCH 10/10] bindings: video: Xylon logiCVC IP core device binding
Xylon logiCVC IP core binding description.
Signed-off-by: Davor Joja <davorjoja@...icbricks.com>
---
.../devicetree/bindings/video/xylon-logicvc.txt | 207 +++++++++++++++++++++
1 file changed, 207 insertions(+)
create mode 100644 Documentation/devicetree/bindings/video/xylon-logicvc.txt
diff --git a/Documentation/devicetree/bindings/video/xylon-logicvc.txt b/Documentation/devicetree/bindings/video/xylon-logicvc.txt
new file mode 100644
index 0000000..12f24c5
--- /dev/null
+++ b/Documentation/devicetree/bindings/video/xylon-logicvc.txt
@@ -0,0 +1,207 @@
+Binding for Xylon logiCVC configurable video controller IP core
+
+Required properties:
+ - compatible: "xylon,logicvc-4.00.a", "xylon,logicvc-4.01.a"
+ - reg: MMIO base address and size of the logiCVC IP core address space
+ - interrupts-parent: the phandle for interrupt controller
+ - interrupts: the interrupt number
+ - pixel-stride: layer width in pixels
+ Common for all available logiCVC standard layers.
+
+ - layer_N: layer has its own configuration described with below properties,
+ where N is layer ID in range 0 - 4
+ - bits-per-pixel: layer bits per pixel configuration (8, 16, 32)
+ Layer is configured to be used with specified pixel width in bits.
+ Pixels written to layer video memory must match in size to configured
+ "bits-per-pixel" value.
+ Note: Allowed "transparency" for values of "bits-per-pixel":
+
+ ===============================================
+ bits-per-pixel transparency
+ ===============================================
+ 8 clut16
+ 8 clut32
+ 8 layer
+ 16 layer
+ 32 layer, pixel
+ ===============================================
+
+ - type: layer type (rgb, yuv, alpha)
+ Layer is configured to be used with specified color space.
+ Pixels written to layer video memory must match specified color format.
+ Type is set to "alpha" if layer contains only pixel alpha values
+ used by layer above. Permitted layer IDs for configuring layer alpha
+ are 1 and 3.
+ - transparency: layer transparency (clut16, clut32, layer, pixel)
+ logiCVC layer can be configured to have transparency control on
+ CLUT, layer or pixel level.
+ "CLUT" mode enables controlling of layer transparency by changing
+ alpha value in logiCVC CLUT registers.
+ "Layer" mode enables controlling of layer transparency by changing
+ alpha value in single logiCVC register.
+ "Pixel" mode enables controlling of pixel transparency by changing
+ dedicated alpha bits of specific pixel in video memory.
+ Note: "transparency" property is not used if "type" property is set
+ to "alpha".
+
+Optional properties:
+ - background-layer-bits-per-pixel: background layer bits per pixel (8, 16, 32)
+ If omitted, last available layer is logiCVC standard layer, which has its
+ own video memory of specific size, color format and specified
+ bits per pixel.
+ If 8, 16 or 32, last available layer is logiCVC background layer,
+ with only specified bits per pixel value.
+ - background-layer-type: background layer type (rgb, yuv)
+ Must be used only when "background-layer-bits-per-pixel" exist.
+ If set to "rgb", in case of 32 bits per pixel, background color register
+ must be written with XRGB8888 value. In case of 16 bits per pixel,
+ background color register must be written with RGB565 value.
+ If set to "yuv", background color register must be written with XYUV8888
+ value.
+ - hsync-active-low: horizontal synchronization pulse is active low "L"
+ If omitted, generated horizontal synchronization pulse polarity is logic
+ high "H".
+ - vsync-active-low: vertical synchronization pulse is active low "L"
+ If omitted, generated vertical synchronization pulse polarity is logic
+ high "H".
+ - pixel-data-invert: output pixel data polarity is inverted
+ If omitted, logiCVC outputs pixel data at default interface polarity.
+ - pixel-data-output-trigger-high: output pixel data triggers on rising edge
+ If omitted, logiCVC outputs pixel data on falling edge of pixel clock.
+ - readable-regs: all logiCVC registers are available for reading
+ If omitted, only Interrupt Status, Power Control and IP Version registers
+ are available for reading.
+ - size-position: logiCVC functionality for controlling on screen layer size
+ and position available
+ If omitted, functionality not available.
+ - component-swap: swap the order of colour components inside the pixel
+ - data-enable-active-low: data enable signal is active low "L"
+ If omitted, generated data enable polarity is logic high "H".
+ - display-interface-itu656: modifies RGB to YUV conversion coefficients
+ - address: layer video memory address for layer_N where
+ N is layer ID in range 0 - 4.
+ logiCVC can be configured to have layer video memory address hardcoded
+ as layer register reset value. This video memory is not part of the system
+ memory. Still it is accessible by CPU and HW devices.
+ If omitted, layer video memory address is set dynamically by
+ device driver.Layer video memory address can be changed dynamically
+ despite the hardcoded address.
+ Note: Additionally, address range parameter can be set. It defines range
+ of video memory in bytes starting from provided address. It is mandatory
+ for physically last layer in memory. If range parameter is omitted for
+ physically last layer, range will be by default set to 2048 lines.
+ If omitted for any other layer then physically last layer,
+ range will be calculated according to address of next physical layer.
+ - buffer-offset: buffer address offset represented in number of lines
+ Used only for HW buffer switching.
+ If omitted, buffer offset variable is by default set to "0".
+ - power-delay: delay in ms after enabling display power supply
+ If omitted, delay is by default set to "0".
+ - signal-delay: delay in ms after enabling display control and data signals
+ in parallel and LVDS interface
+ If omitted, delay is by default set to "0".
+ - display-timings: custom display video mode timing parameters
+ If omitted, driver will use its default video mode timings.
+ native-mode optional parameter determines which video mode timings from
+ the list are used. If native-mode parameter is omitted, first available
+ video mode timings are used.
+
+Example:
+
+ logicvc_0: logicvc@...00000 {
+ compatible = "xylon,logicvc-4.00.a";
+ reg = <0x40030000 0x6000>;
+ interrupt-parent = <&ps7_scugic_0>;
+ interrupts = <0 59 4>;
+ background-layer-bits-per-pixel = <32>;
+ background-layer-type = "rgb";
+ display-interface-itu656;
+ hsync-active-low;
+ vsync-active-low;
+ data-enable-active-low;
+ pixel-data-invert;
+ pixel-data-output-trigger-high;
+ readable-regs;
+ size-position;
+ pixel-stride = <2048>;
+ power-delay = <100>;
+ signal-delay = <50>;
+ layer_0 {
+ address = <0x30000000>
+ buffer-offset = <512>;
+ bits-per-pixel = <16>;
+ type = "yuv";
+ transparency = "layer";
+ component-swap;
+ };
+ layer_1 {
+ address = <0x30600000>;
+ bits-per-pixel = <32>;
+ type = "rgb";
+ transparency = "pixel";
+ };
+ layer_2 {
+ address = <0x31F50000>;
+ bits-per-pixel = <8>;
+ type = "rgb";
+ transparency = "clut32";
+ };
+ layer_3 {
+ address = <0x3216C000 0xCA8000>;
+ bits-per-pixel = <16>;
+ type = "rgb";
+ transparency = "layer";
+ };
+
+ display-timings {
+ native-mode = <&wsxga>;
+ hd720p: 1280x720 {
+ clock-frequency = <74250000>;
+ hactive = <1280>;
+ vactive = <720>;
+ hfront-porch = <110>;
+ hback-porch = <220>;
+ hsync-len = <40>;
+ vfront-porch = <5>;
+ vback-porch = <20>;
+ vsync-len = <5>;
+ hsync-active = <0>;
+ vsync-active = <0>;
+ de-active = <1>;
+ pixelclk-active = <1>;
+ };
+ wsxga: 1680x1050 {
+ clock-frequency = <119000000>;
+ hactive = <1680>;
+ vactive = <1050>;
+ hfront-porch = <48>;
+ hback-porch = <80>;
+ hsync-len = <32>;
+ vfront-porch = <3>;
+ vback-porch = <21>;
+ vsync-len = <6>;
+ };
+ hd1080p: 1920x1080 {
+ clock-frequency = <148500000>;
+ hactive = <1920>;
+ vactive = <1080>;
+ hfront-porch = <88>;
+ hback-porch = <148>;
+ hsync-len = <44>;
+ vfront-porch = <4>;
+ vback-porch = <36>;
+ vsync-len = <5>;
+ };
+ TM050RBH01: 800x480 {
+ clock-frequency = <30000000>;
+ hactive = <800>;
+ vactive = <480>;
+ hfront-porch = <40>;
+ hback-porch = <40>;
+ hsync-len = <48>;
+ vfront-porch = <13>;
+ vback-porch = <29>;
+ vsync-len = <3>;
+ };
+ };
+ };
--
1.9.1
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