dt-bindings: mediatek: add ovl_2l description for mt8183 display

Update device tree binding documention for the display subsystem for
Mediatek MT8183 SOCs

Signed-off-by: Yongqiang Niu <yongqiang.niu@mediatek.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: CK Hu <ck.hu@mediatek.com>

diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt b/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt
index 8469de5..c2dbc9e 100644 (file)
--- a/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt
+++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,disp.txt
@@ -27,19 +27,20 @@ Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.txt.
 
 Required properties (all function blocks):
 - compatible: "mediatek,<chip>-disp-<function>", one of
-       "mediatek,<chip>-disp-ovl"   - overlay (4 layers, blending, csc)
-       "mediatek,<chip>-disp-rdma"  - read DMA / line buffer
-       "mediatek,<chip>-disp-wdma"  - write DMA
-       "mediatek,<chip>-disp-color" - color processor
-       "mediatek,<chip>-disp-aal"   - adaptive ambient light controller
-       "mediatek,<chip>-disp-gamma" - gamma correction
-       "mediatek,<chip>-disp-merge" - merge streams from two RDMA sources
-       "mediatek,<chip>-disp-split" - split stream to two encoders
-       "mediatek,<chip>-disp-ufoe"  - data compression engine
-       "mediatek,<chip>-dsi"        - DSI controller, see mediatek,dsi.txt
-       "mediatek,<chip>-dpi"        - DPI controller, see mediatek,dpi.txt
-       "mediatek,<chip>-disp-mutex" - display mutex
-       "mediatek,<chip>-disp-od"    - overdrive
+       "mediatek,<chip>-disp-ovl"              - overlay (4 layers, blending, csc)
+       "mediatek,<chip>-disp-ovl-2l"           - overlay (2 layers, blending, csc)
+       "mediatek,<chip>-disp-rdma"             - read DMA / line buffer
+       "mediatek,<chip>-disp-wdma"             - write DMA
+       "mediatek,<chip>-disp-color"            - color processor
+       "mediatek,<chip>-disp-aal"              - adaptive ambient light controller
+       "mediatek,<chip>-disp-gamma"            - gamma correction
+       "mediatek,<chip>-disp-merge"            - merge streams from two RDMA sources
+       "mediatek,<chip>-disp-split"            - split stream to two encoders
+       "mediatek,<chip>-disp-ufoe"             - data compression engine
+       "mediatek,<chip>-dsi"                   - DSI controller, see mediatek,dsi.txt
+       "mediatek,<chip>-dpi"                   - DPI controller, see mediatek,dpi.txt
+       "mediatek,<chip>-disp-mutex"            - display mutex
+       "mediatek,<chip>-disp-od"               - overdrive
   the supported chips are mt2701, mt2712 and mt8173.
 - reg: Physical base address and length of the function block register space
 - interrupts: The interrupt signal from the function block (required, except for