12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273747576777879808182 |
- Device-Tree bindings for tilcdc DRM driver
- Required properties:
- - compatible: value should be one of the following:
- - "ti,am33xx-tilcdc" for AM335x based boards
- - "ti,da850-tilcdc" for DA850/AM18x/OMAP-L138 based boards
- - interrupts: the interrupt number
- - reg: base address and size of the LCDC device
- Recommended properties:
- - ti,hwmods: Name of the hwmod associated to the LCDC
- Optional properties:
- - max-bandwidth: The maximum pixels per second that the memory
- interface / lcd controller combination can sustain
- - max-width: The maximum horizontal pixel width supported by
- the lcd controller.
- - max-pixelclock: The maximum pixel clock that can be supported
- by the lcd controller in KHz.
- - blue-and-red-wiring: Recognized values "straight" or "crossed".
- This property deals with the LCDC revision 2 (found on AM335x)
- color errata [1].
- - "straight" indicates normal wiring that supports RGB565,
- BGR888, and XBGR8888 color formats.
- - "crossed" indicates wiring that has blue and red wires
- crossed. This setup supports BGR565, RGB888 and XRGB8888
- formats.
- - If the property is not present or its value is not recognized
- the legacy mode is assumed. This configuration supports RGB565,
- RGB888 and XRGB8888 formats. However, depending on wiring, the red
- and blue colors are swapped in either 16 or 24-bit color modes.
- Optional nodes:
- - port/ports: to describe a connection to an external encoder. The
- binding follows Documentation/devicetree/bindings/graph.txt and
- supports a single port with a single endpoint.
- - See also Documentation/devicetree/bindings/display/tilcdc/panel.txt and
- Documentation/devicetree/bindings/display/tilcdc/tfp410.txt for connecting
- tfp410 DVI encoder or lcd panel to lcdc
- [1] There is an errata about AM335x color wiring. For 16-bit color mode
- the wires work as they should (LCD_DATA[0:4] is for Blue[3:7]),
- but for 24 bit color modes the wiring of blue and red components is
- crossed and LCD_DATA[0:4] is for Red[3:7] and LCD_DATA[11:15] is
- for Blue[3-7]. For more details see section 3.1.1 in AM335x
- Silicon Errata:
- http://www.ti.com/general/docs/lit/getliterature.tsp?baseLiteratureNumber=sprz360
- Example:
- fb: fb@4830e000 {
- compatible = "ti,am33xx-tilcdc", "ti,da850-tilcdc";
- reg = <0x4830e000 0x1000>;
- interrupt-parent = <&intc>;
- interrupts = <36>;
- ti,hwmods = "lcdc";
- blue-and-red-wiring = "crossed";
- port {
- lcdc_0: endpoint@0 {
- remote-endpoint = <&hdmi_0>;
- };
- };
- };
- tda19988: tda19988 {
- compatible = "nxp,tda998x";
- reg = <0x70>;
- pinctrl-names = "default", "off";
- pinctrl-0 = <&nxp_hdmi_bonelt_pins>;
- pinctrl-1 = <&nxp_hdmi_bonelt_off_pins>;
- port {
- hdmi_0: endpoint@0 {
- remote-endpoint = <&lcdc_0>;
- };
- };
- };
|