Commit de120d09 authored Apr 21, 2017 by Chen-Yu Tsai Committed by Maxime Ripard May 14, 2017

dt-bindings: display: sun4i: Add component endpoint ID numbering scheme

The Allwinner display pipeline contains many hardware components, some
of which can consume data from one of multiple upstream components.
The numbering scheme of these components must be encoded into the device
tree so the driver can figure out which component out of two or more of
the same type it is supposed to use or program.

This patch adds the constraint that local endpoint IDs must be the index
or number of the remote endpoint's hardware block, for all components
in the display pipeline up to the TCONs.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

parent 2ea659a9

Documentation/devicetree/bindings/display/sunxi/sun4i-drm.txt

+10 −0

Original line number	Diff line number	Diff line
		@@ -4,6 +4,16 @@ Allwinner A10 Display Pipeline
		The Allwinner A10 Display pipeline is composed of several components
		that are going to be documented below:

		For the input port of all components up to the TCON in the display
		pipeline, if there are multiple components, the local endpoint IDs
		must correspond to the index of the upstream block. For example, if
		the remote endpoint is Frontend 1, then the local endpoint ID must
		be 1.

		Conversely, for the output ports of the same group, the remote endpoint
		ID must be the index of the local hardware block. If the local backend
		is backend 1, then the remote endpoint ID must be 1.

		TV Encoder
		----------