projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 16ea975e RC |
1 | Device-Tree bindings for tilcdc DRM driver |
| 2 | ||
| 3 | Required properties: | |
| 4 | - compatible: value should be "ti,am33xx-tilcdc". | |
| 5 | - interrupts: the interrupt number | |
| 6 | - reg: base address and size of the LCDC device | |
| 7 | ||
| 8 | Recommended properties: | |
| 9 | - interrupt-parent: the phandle for the interrupt controller that | |
| 10 | services interrupts for this device. | |
| 11 | - ti,hwmods: Name of the hwmod associated to the LCDC | |
| 12 | ||
| 4e564346 DE |
13 | Optional properties: |
| 14 | - max-bandwidth: The maximum pixels per second that the memory | |
| 15 | interface / lcd controller combination can sustain | |
| 16 | - max-width: The maximum horizontal pixel width supported by | |
| 17 | the lcd controller. | |
| 18 | - max-pixelclock: The maximum pixel clock that can be supported | |
| 19 | by the lcd controller in KHz. | |
| bcc5a6f5 JS |
20 | - blue-and-red-wiring: Recognized values "default", "straight" or |
| 21 | "crossed". This property deals with the LCDC revision 2 (found on | |
| 22 | AM335x) color errata [1]. | |
| 23 | - "straight" indicates normal wiring that supports RGB565, | |
| 24 | BGR888, and XBGR8888 color formats. | |
| 25 | - "crossed" indicates wiring that has blue and red wires | |
| 26 | crossed. This setup supports BGR565, RGB888 and XRGB8888 | |
| 27 | formats. | |
| 28 | - If the property is not present or its value is not recognized | |
| 29 | the legacy mode is assumed. This configuration supports RGB565, | |
| 30 | RGB888 and XRGB8888 formats. However, depending on wiring, the red | |
| 31 | and blue colors are swapped in either 16 or 24-bit color modes. | |
| 4e564346 | 32 | |
| 103cd8bc JS |
33 | Optional nodes: |
| 34 | ||
| 35 | - port/ports: to describe a connection to an external encoder. The | |
| 36 | binding follows Documentation/devicetree/bindings/graph.txt and | |
| 37 | suppors a single port with a single endpoint. | |
| 38 | ||
| 24b31ba0 JS |
39 | - See also Documentation/devicetree/bindings/display/tilcdc/panel.txt and |
| 40 | Documentation/devicetree/bindings/display/tilcdc/tfp410.txt for connecting | |
| 41 | tfp410 DVI encoder or lcd panel to lcdc | |
| 42 | ||
| bcc5a6f5 JS |
43 | [1] There is an errata about AM335x color wiring. For 16-bit color mode |
| 44 | the wires work as they should (LCD_DATA[0:4] is for Blue[3:7]), | |
| 45 | but for 24 bit color modes the wiring of blue and red components is | |
| 46 | crossed and LCD_DATA[0:4] is for Red[3:7] and LCD_DATA[11:15] is | |
| 47 | for Blue[3-7]. For more details see section 3.1.1 in AM335x | |
| 48 | Silicon Errata: | |
| 49 | http://www.ti.com/general/docs/lit/getliterature.tsp?baseLiteratureNumber=sprz360 | |
| 50 | ||
| 16ea975e RC |
51 | Example: |
| 52 | ||
| 53 | fb: fb@4830e000 { | |
| 54 | compatible = "ti,am33xx-tilcdc"; | |
| 55 | reg = <0x4830e000 0x1000>; | |
| 56 | interrupt-parent = <&intc>; | |
| 57 | interrupts = <36>; | |
| 58 | ti,hwmods = "lcdc"; | |
| 103cd8bc | 59 | |
| bcc5a6f5 JS |
60 | blue-and-red-wiring = "crossed"; |
| 61 | ||
| 103cd8bc JS |
62 | port { |
| 63 | lcdc_0: endpoint@0 { | |
| 64 | remote-endpoint = <&hdmi_0>; | |
| 65 | }; | |
| 66 | }; | |
| 67 | }; | |
| 68 | ||
| 69 | tda19988: tda19988 { | |
| 70 | compatible = "nxp,tda998x"; | |
| 71 | reg = <0x70>; | |
| 72 | ||
| 73 | pinctrl-names = "default", "off"; | |
| 74 | pinctrl-0 = <&nxp_hdmi_bonelt_pins>; | |
| 75 | pinctrl-1 = <&nxp_hdmi_bonelt_off_pins>; | |
| 76 | ||
| 77 | port { | |
| 78 | hdmi_0: endpoint@0 { | |
| 79 | remote-endpoint = <&lcdc_0>; | |
| 80 | }; | |
| 81 | }; | |
| 16ea975e | 82 | }; |