| Device-Tree bindings for tilcdc DRM driver |
| |
| Required properties: |
| - compatible: value should be "ti,am33xx-tilcdc". |
| - interrupts: the interrupt number |
| - reg: base address and size of the LCDC device |
| |
| Recommended properties: |
| - interrupt-parent: the phandle for the interrupt controller that |
| services interrupts for this device. |
| - 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 |
| suppors 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"; |
| 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>; |
| }; |
| }; |
| }; |