diff options
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/devicetree/bindings/display/tilcdc/tilcdc.txt | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/display/tilcdc/tilcdc.txt b/Documentation/devicetree/bindings/display/tilcdc/tilcdc.txt index 6efa4c55d118..a5007aa437f3 100644 --- a/Documentation/devicetree/bindings/display/tilcdc/tilcdc.txt +++ b/Documentation/devicetree/bindings/display/tilcdc/tilcdc.txt @@ -17,6 +17,18 @@ 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 "default", "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: @@ -28,6 +40,14 @@ Optional nodes: 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 { @@ -37,6 +57,8 @@ Example: interrupts = <36>; ti,hwmods = "lcdc"; + blue-and-red-wiring = "crossed"; + port { lcdc_0: endpoint@0 { remote-endpoint = <&hdmi_0>; |