Re: [PATCH] dt-bindings: simplefb: Document naming scheme for pre-populated simplefb nodes

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 




On Fri, Nov 14, 2014 at 9:02 AM, Hans de Goede <hdegoede@xxxxxxxxxx> wrote:
> Since we advice to use pre-populated simeplfb nodes in dt files, where the
> firmware then only needs to fill in the mode info + address and enable it,
> we should also specify how these pre-populated nodes should be named so
> that the firmware can find and enable the right one.
>
> Signed-off-by: Hans de Goede <hdegoede@xxxxxxxxxx>
> ---
>  Documentation/devicetree/bindings/video/simple-framebuffer.txt | 7 +++++++
>  1 file changed, 7 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/video/simple-framebuffer.txt b/Documentation/devicetree/bindings/video/simple-framebuffer.txt
> index c548f33..01dc948 100644
> --- a/Documentation/devicetree/bindings/video/simple-framebuffer.txt
> +++ b/Documentation/devicetree/bindings/video/simple-framebuffer.txt
> @@ -29,6 +29,13 @@ enable them. This way if e.g. later on support for more display clocks get
>  added, the simplefb nodes will already contain this info and the firmware
>  does not need to be updated.
>
> +If pre-filled framebuffer nodes are used, they should be named
> +"framebuffer#-<output>", e.g. "framebuffer0-hdmi". The output should be
> +included in the name since different outputs typically require different
> +clocks and the clocks are part of the pre-populated nodes. The firmware must
> +rename the nodes to the standard "framebuffer@<address>" using the runtime
> +chosen address when enabling the nodes.

-<output> should be optional, an only used when there are multiple options.

Something we've not talked about is how to handle a framebuffer that
has been set up with mirrored displays. Does that case matter?

g.
--
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




[Index of Archives]     [Device Tree Compilter]     [Device Tree Spec]     [Linux Driver Backports]     [Video for Linux]     [Linux USB Devel]     [Linux PCI Devel]     [Linux Audio Users]     [Linux Kernel]     [Linux SCSI]     [XFree86]     [Yosemite Backpacking]
  Powered by Linux