diff options
Diffstat (limited to 'Documentation/devicetree/bindings/display/tilcdc/tilcdc.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/display/tilcdc/tilcdc.txt | 32 |
1 files changed, 30 insertions, 2 deletions
diff --git a/Documentation/devicetree/bindings/display/tilcdc/tilcdc.txt b/Documentation/devicetree/bindings/display/tilcdc/tilcdc.txt index 2136ee81e061..6fddb4f4f71a 100644 --- a/Documentation/devicetree/bindings/display/tilcdc/tilcdc.txt +++ b/Documentation/devicetree/bindings/display/tilcdc/tilcdc.txt @@ -1,7 +1,9 @@ Device-Tree bindings for tilcdc DRM driver Required properties: - - compatible: value should be "ti,am33xx-tilcdc". + - 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 @@ -17,6 +19,18 @@ Optional properties: 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: @@ -24,15 +38,29 @@ Optional nodes: 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"; + 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>; |