[PATCH v2 17/26] drm: sun4i: Add DT bindings documentation

On Wed, Feb 3, 2016 at 1:59 PM, Maxime Ripard
[off-list ref] wrote:

Hi Rob,

On Thu, Jan 14, 2016 at 09:15:15PM -0600, Rob Herring wrote:

quoted

On Thu, Jan 14, 2016 at 04:25:00PM +0100, Maxime Ripard wrote:

quoted

The display pipeline of the Allwinner A10 is involving several loosely
coupled components.

Add a documentation for the bindings.

Signed-off-by: Maxime Ripard <redacted>
---
 .../bindings/display/sunxi/sun4i-drm.txt           | 228 +++++++++++++++++++++

[...]

quoted

quoted

+Required properties:
+  - compatible: value must be one of:
+    * allwinner,sun5i-a13-display-engine
+  - allwinner,pipelines: list of phandle to the entry points of the
+    pipelines (either to the frontend or backend)
+
+Example:
+
+panel: panel {
+   compatible = "olimex,lcd-olinuxino-43-ts";

This should either be a child of what it is attached to or use of-graph.

You had a similar discussion with Thierry last time I sent it, and it
seemed to settle on keeping that property:

http://lists.infradead.org/pipermail/linux-arm-kernel/2015-October/382115.html

Has that changed?

No, I still disagree. We already have 2 ways to describe panels: as a
child node of its controller or with of-graph. We don't need a 3rd way
even if it is simple. The problem with of-graph today is too much of
the parsing is left to the individual drivers. We need to fix that and
make it be handled by common code.

Rob