On 09/15/2015 04:37 AM, Xinwei Kong wrote:
This adds documentation of device tree bindings for the Graphics Processing Unit of hi6220 SOC.
Signed-off-by: Xinliang Liu xinliang.liu@linaro.org Signed-off-by: Xinwei Kong kong.kongxinwei@hisilicon.com Signed-off-by: Andy Green andy.green@linaro.org Signed-off-by: Jiwen Qi qijiwen@hisilicon.com Signed-off-by: Yu Gong gongyu@hisilicon.com
.../devicetree/bindings/gpu/hisilicon,hi6220.txt | 69 ++++++++++++++++++++++ 1 file changed, 69 insertions(+) create mode 100644 Documentation/devicetree/bindings/gpu/hisilicon,hi6220.txt
diff --git a/Documentation/devicetree/bindings/gpu/hisilicon,hi6220.txt b/Documentation/devicetree/bindings/gpu/hisilicon,hi6220.txt new file mode 100644 index 0000000..173ac63 --- /dev/null +++ b/Documentation/devicetree/bindings/gpu/hisilicon,hi6220.txt @@ -0,0 +1,69 @@
- Hisilicon hi6220 Graphics Processing Unit for HiKey board
- ** display-subsystem: Master device for binding DRM sub-components
DRM is a Linuxism that doesn't belong in the binding.
- This master device is parent node and it will be responsible to bind all
- sub-components devices node.
Are these nodes a single block in the h/w? If not, you should describe the connection of sub-nodes with of-graph instead.
- Required properties :
- compatible: "hisilicon,display-subsystem".- #address-cells, #size-cells: Must be present if the device has sub-nodes.- ranges: to allow probing of subdevices.- dma-coherent: Present if dma operations are coherent.- ** ade: Graphic overlay, Graphic post-processing, display timing control.
- This device is child node of display-subsystem
- Required properties :
- compatible: "hisilicon,hi6220-ade".- reg: physical base address of the ADE register and length of memory- region.
- reg-names: Should contain the reg names "ade_base" and "media_base".- interrupt: The interrupt number to the cpu. Defines the interruptby ADE.- clocks: The clocks needed by the ADE module.- clock-names: the name of the clocks.- ** dsi: support mipi dsi interface
- This device is child node of display-subsystem
- Required properties :
- compatible: "hisilicon,hi6220-dsi".- reg: physical base address of the DSI register and length of memory- region.
- clocks: The clocks needed by the DSI module.- clock-names: the name of the clocks.- encoder-slave: phandles to a 'encoder-slave' subnode which DSI connectADV7533 in order to support hdmi display.
What the ADV7533 binding looks like is still being discussed. "encoder-slave" is certainly DRM specific and not how it should be done. Most likely, this needs to use the of-graph ports.
Also, the ADV7533 connection is specific to HiKey. This binding should just generically describe how any bridge or panel is connected.
Rob