Hi,
Dirk Behme wrote:
> Hi Lothar and Shawn,
>
> On 08.08.2013 14:51, Lothar Waßmann wrote:
> > - add Copyright header
> > - use label references for better readability
> > - sort the entries alphabetically
> > - add some aliases used by U-Boot to edit the DT data
> >
> > Signed-off-by: Lothar Waßmann <LW@xxxxxxxxxxxxxxxxxxx>
> > ---
> > arch/arm/boot/dts/imx28-tx28.dts | 693 +++++++++++++++++++++++++++++++++-----
> > 1 files changed, 611 insertions(+), 82 deletions(-)
> >
> > diff --git a/arch/arm/boot/dts/imx28-tx28.dts b/arch/arm/boot/dts/imx28-tx28.dts
> > index 37be532..866af60 100644
> > --- a/arch/arm/boot/dts/imx28-tx28.dts
> > +++ b/arch/arm/boot/dts/imx28-tx28.dts
> ...
> > +&lcdif {
> > + pinctrl-names = "default";
> > + pinctrl-0 = <&lcdif_24bit_pins_a &lcdif_sync_pins_a &lcdif_ctrl_pins_a>;
> > + lcd-supply = <®_lcd>;
> > + display = <&display>;
> > + status = "okay";
> > +
> > + display: display@0 {
> > + bits-per-pixel = <32>;
> > + bus-width = <24>;
> > +
> > + display-timings {
> > + native-mode = <&timing5>;
^^^^^^^^^^^^^^^^^^^^^^^^^
> > + timing0: timing0 {
[...]
> > + };
> > + };
> > + };
> > +};
>
> Being no graphics expert, looking at above device tree change, I'd like
> to understand how this can be used to switch between different display
> timings?
>
> In the kernel, I've found the code which selects the default/native-mode
> (of_display_timing.c). But, as here, if there is a native/default mode,
> there are alternative modes. I haven't understood how and who to select
> these other modes? In this case, how could the alternative modes
> timing0/1/2/3/4 be selected in the kernel?
>
> Do you have any pointers regarding this?
>
You need to set the property 'native-mode' to the phandle of the
display-timings entry like marked above.
Lothar Waßmann
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