On Aug 30, 2013, at 10:25 AM, Thierry Reding wrote:
Add a driver for simple panels. Such panels can have a regulator that provides the supply voltage and a separate GPIO to enable the panel. Optionally the panels can have a backlight associated with them so it can be enabled or disabled according to the panel's power management mode.
Support is added for three panels: An AU Optronics 10.1" WSVGA, a Chunghwa Picture Tubes 10.1" WXGA and a Panasonic 10.1 WUXGA TFT LCD panel.
Signed-off-by: Thierry Reding treding@nvidia.com
.../devicetree/bindings/panel/panel-simple.txt | 25 ++ drivers/gpu/drm/Makefile | 1 + drivers/gpu/drm/panel/Kconfig | 13 + drivers/gpu/drm/panel/Makefile | 1 + drivers/gpu/drm/panel/panel-simple.c | 335 +++++++++++++++++++++ 5 files changed, 375 insertions(+) create mode 100644 Documentation/devicetree/bindings/panel/panel-simple.txt create mode 100644 drivers/gpu/drm/panel/Makefile create mode 100644 drivers/gpu/drm/panel/panel-simple.c
diff --git a/Documentation/devicetree/bindings/panel/panel-simple.txt b/Documentation/devicetree/bindings/panel/panel-simple.txt new file mode 100644 index 0000000..dfd4b76 --- /dev/null +++ b/Documentation/devicetree/bindings/panel/panel-simple.txt @@ -0,0 +1,25 @@ +Simple display panel
+Required properties: +- compatible: should be one of:
- "auo,b101aw03": AU Optronics Corporation 10.1" WSVGA TFT LCD panel
- "cptt,claa101wb03": Chunghwa Picture Tubes Ltd. 10.1" WXGA TFT LCD panel
- "pc,vvx10f004b00": Panasonic Corporation 10.1" WUXGA TFT LCD panel
It would seem there should be a more generic compatible to cover the basic "panel-simple" case.
+Optional properties: +- ddc-i2c-bus: phandle of an I2C controller used for DDC EDID probing +- power-supply: regulator to provide the supply voltage +- enable-gpios: GPIO pin to enable or disable the panel +- backlight: phandle of the backlight device attached to the panel
If these are all optional, what does it mean to be a "panel-simple"?
+Example:
- panel: panel {
compatible = "cptt,claa101wb01";ddc-i2c-bus = <&panelddc>;power-supply = <&vdd_pnl_reg>;enable-gpios = <&gpio 90 0>;backlight = <&backlight>;- };
We'd normally do this as unique binding specs for the specific devices and a generic one to cover the concepts of a simple panel. Who know if in the future a 'auo,b101aw03' might want some other unique properties.
[snip]
- k