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staging: imx-drm: Document updated imx-drm device tree bindings

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This patch updates the device tree binding documentation for i.MX IPU/display
nodes using the OF graph bindings documented in
Documentation/devicetree/bindings/media/video-interfaces.txt.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Philipp Zabel 2014-03-05 10:20:54 +01:00 committed by Russell King
parent b6babdd93c
commit 408eb4f5a9
2 changed files with 59 additions and 9 deletions
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48
Documentation/devicetree/bindings/staging/imx-drm/fsl-imx-drm.txt
View file

@ -1,3 +1,22 @@
Freescale i.MX DRM master device
================================
The freescale i.MX DRM master device is a virtual device needed to list all
IPU or other display interface nodes that comprise the graphics subsystem.
Required properties:
- compatible: Should be "fsl,imx-display-subsystem"
- ports: Should contain a list of phandles pointing to display interface ports
of IPU devices
example:
display-subsystem {
compatible = "fsl,display-subsystem";
ports = <&ipu_di0>;
};
Freescale i.MX IPUv3
====================
@ -7,18 +26,31 @@ Required properties:
datasheet
- interrupts: Should contain sync interrupt and error interrupt,
in this order.
- #crtc-cells: 1, See below
- resets: phandle pointing to the system reset controller and
reset line index, see reset/fsl,imx-src.txt for details
Optional properties:
- port@[0-3]: Port nodes with endpoint definitions as defined in
Documentation/devicetree/bindings/media/video-interfaces.txt.
Ports 0 and 1 should correspond to CSI0 and CSI1,
ports 2 and 3 should correspond to DI0 and DI1, respectively.
example:
ipu: ipu@18000000 {
#crtc-cells = <1>;
#address-cells = <1>;
#size-cells = <0>;
compatible = "fsl,imx53-ipu";
reg = <0x18000000 0x080000000>;
interrupts = <11 10>;
resets = <&src 2>;
ipu_di0: port@2 {
reg = <2>;
ipu_di0_disp0: endpoint {
remote-endpoint = <&display_in>;
};
};
};
Parallel display support
@ -26,19 +58,25 @@ Parallel display support
Required properties:
- compatible: Should be "fsl,imx-parallel-display"
- crtc: the crtc this display is connected to, see below
Optional properties:
- interface_pix_fmt: How this display is connected to the
crtc. Currently supported types: "rgb24", "rgb565", "bgr666"
display interface. Currently supported types: "rgb24", "rgb565", "bgr666"
- edid: verbatim EDID data block describing attached display.
- ddc: phandle describing the i2c bus handling the display data
channel
- port: A port node with endpoint definitions as defined in
Documentation/devicetree/bindings/media/video-interfaces.txt.
example:
display@di0 {
compatible = "fsl,imx-parallel-display";
edid = [edid-data];
crtc = <&ipu 0>;
interface-pix-fmt = "rgb24";
port {
display_in: endpoint {
remote-endpoint = <&ipu_di0_disp0>;
};
};
};

20
Documentation/devicetree/bindings/staging/imx-drm/ldb.txt
View file

@ -50,12 +50,14 @@ have a look at Documentation/devicetree/bindings/video/display-timing.txt.
Required properties:
- reg : should be <0> or <1>
- crtcs : a list of phandles with index pointing to the IPU display interfaces
that can be used as video source for this channel.
- fsl,data-mapping : should be "spwg" or "jeida"
This describes how the color bits are laid out in the
serialized LVDS signal.
- fsl,data-width : should be <18> or <24>
- port: A port node with endpoint definitions as defined in
Documentation/devicetree/bindings/media/video-interfaces.txt.
On i.MX6, there should be four ports (port@[0-3]) that correspond
to the four LVDS multiplexer inputs.
example:
@ -77,23 +79,33 @@ ldb: ldb@53fa8008 {
lvds-channel@0 {
reg = <0>;
crtcs = <&ipu 0>;
fsl,data-mapping = "spwg";
fsl,data-width = <24>;
display-timings {
/* ... */
};
port {
lvds0_in: endpoint {
remote-endpoint = <&ipu_di0_lvds0>;
};
};
};
lvds-channel@1 {
reg = <1>;
crtcs = <&ipu 1>;
fsl,data-mapping = "spwg";
fsl,data-width = <24>;
display-timings {
/* ... */
};
port {
lvds1_in: endpoint {
remote-endpoint = <&ipu_di1_lvds1>;
};
};
};
};