[RFC resend 1/4] dt-bindings: display: mediatek: add drm binding

[Matthias Brugger <matthias.bgg@gmail.com>]

DRM subysystem and clock driver shared the same compatible mmsys.
This stopped does not work, as only the first driver for a compatible
gets probed. We change the comaptible to the new DRM identifier to fix
this.

Signed-off-by: Matthias Brugger <mbrugger@suse.com>
---
 .../devicetree/bindings/display/mediatek/mediatek,disp.txt          | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt b/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt
index 383183a89164..6db652463e64 100644
--- a/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt
+++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt
@@ -27,6 +27,7 @@ Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.txt.
 
 Required properties (all function blocks):
 - compatible: "mediatek,<chip>-disp-<function>", one of
+	"mediatek,<chip>-dispsys"    - central component for the DRM system
 	"mediatek,<chip>-disp-ovl"   - overlay (4 layers, blending, csc)
 	"mediatek,<chip>-disp-rdma"  - read DMA / line buffer
 	"mediatek,<chip>-disp-wdma"  - write DMA
@@ -71,6 +72,11 @@ mmsys: clock-controller@14000000 {
 	#clock-cells = <1>;
 };
 
+dispsys: display-system {
+	compatible = "mediatek,mt2701-dispsys";
+	mediatek,mmsys = <&mmsys>;
+}
+
 ovl0: ovl@1400c000 {
 	compatible = "mediatek,mt8173-disp-ovl";
 	reg = <0 0x1400c000 0 0x1000>;
-- 
2.14.2