On Tue, Aug 16, 2016 at 12:24:28PM +0300, Jyri Sarha wrote: > Add "blue-and-red-wiring"-device tree property and update devicetree > binding document. The red and blue components are reversed between 24 > and 16 bit modes on am335x LCDC output pins. To get 24 RGB format the > red and blue wires has to be crossed and this in turn causes 16 colors > output to be in BGR format. With straight wiring the 16 color is RGB > and 24 bit is BGR. The new property describes whether the red and blue > wires are crossed or not. The am335x-evm has the wires going to LCD > crossed and that is chosen to be the default mode if > "blue-and-red-wiring"-property is not found. > > For more details see section 3.1.1 in AM335x Silicon Errata: > http://www.ti.com/general/docs/lit/getliterature.tsp?baseLiteratureNumber=sprz360 > > Signed-off-by: Jyri Sarha <jsarha@xxxxxx> > --- > .../devicetree/bindings/display/tilcdc/tilcdc.txt | 12 ++++++ > drivers/gpu/drm/tilcdc/tilcdc_drv.c | 44 ++++++++++++++++++++++ > drivers/gpu/drm/tilcdc/tilcdc_drv.h | 4 ++ > drivers/gpu/drm/tilcdc/tilcdc_plane.c | 9 ++--- > 4 files changed, 63 insertions(+), 6 deletions(-) > > diff --git a/Documentation/devicetree/bindings/display/tilcdc/tilcdc.txt b/Documentation/devicetree/bindings/display/tilcdc/tilcdc.txt > index 6efa4c5..992803b 100644 > --- a/Documentation/devicetree/bindings/display/tilcdc/tilcdc.txt > +++ b/Documentation/devicetree/bindings/display/tilcdc/tilcdc.txt > @@ -17,6 +17,8 @@ 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: Either "crossed" or "straight", if not present > + crossed wiring is assumed for dtb backward compatibility. [1] Just do a boolean and restrict it to a particular compatible string so we don't have to carry it forever on new parts. Rob -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
