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-rw-r--r--Documentation/devicetree/bindings/display/tilcdc/tilcdc.txt26
1 files changed, 26 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/display/tilcdc/tilcdc.txt b/Documentation/devicetree/bindings/display/tilcdc/tilcdc.txt
index 2136ee81e061..a83abd79c55c 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 "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:
@@ -24,6 +36,18 @@ 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 {
@@ -33,6 +57,8 @@ Example:
interrupts = <36>;
ti,hwmods = "lcdc";
+ blue-and-red-wiring = "crossed";
+
port {
lcdc_0: endpoint@0 {
remote-endpoint = <&hdmi_0>;