mirror of
https://github.com/Fishwaldo/u-boot.git
synced 2025-03-18 21:21:37 +00:00
fdt: video: omap: add framebuffer and panel bindings
Add device-tree binding documentation for ti framebuffer and generic panel output driver. Signed-off-by: Dario Binacchi <dariobin@libero.it> Reviewed-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
parent
72e0a0e1c7
commit
cb8680a4b8
2 changed files with 148 additions and 0 deletions
66
doc/device-tree-bindings/video/tilcdc/panel.txt
Normal file
66
doc/device-tree-bindings/video/tilcdc/panel.txt
Normal file
|
@ -0,0 +1,66 @@
|
|||
Device-Tree bindings for tilcdc DRM generic panel output driver
|
||||
|
||||
Required properties:
|
||||
- compatible: value should be "ti,tilcdc,panel".
|
||||
- panel-info: configuration info to configure LCDC correctly for the panel
|
||||
- ac-bias: AC Bias Pin Frequency
|
||||
- ac-bias-intrpt: AC Bias Pin Transitions per Interrupt
|
||||
- dma-burst-sz: DMA burst size
|
||||
- bpp: Bits per pixel
|
||||
- fdd: FIFO DMA Request Delay
|
||||
- sync-edge: Horizontal and Vertical Sync Edge: 0=rising 1=falling
|
||||
- sync-ctrl: Horizontal and Vertical Sync: Control: 0=ignore
|
||||
- raster-order: Raster Data Order Select: 1=Most-to-least 0=Least-to-most
|
||||
- fifo-th: DMA FIFO threshold
|
||||
- display-timings: typical videomode of lcd panel. Multiple video modes
|
||||
can be listed if the panel supports multiple timings, but the 'native-mode'
|
||||
should be the preferred/default resolution. Refer to
|
||||
Documentation/devicetree/bindings/display/panel/display-timing.txt for display
|
||||
timing binding details.
|
||||
|
||||
Optional properties:
|
||||
- backlight: phandle of the backlight device attached to the panel
|
||||
- enable-gpios: GPIO pin to enable or disable the panel
|
||||
|
||||
Recommended properties:
|
||||
- pinctrl-names, pinctrl-0: the pincontrol settings to configure
|
||||
muxing properly for pins that connect to TFP410 device
|
||||
|
||||
Example:
|
||||
|
||||
/* Settings for CDTech_S035Q01 / LCD3 cape: */
|
||||
lcd3 {
|
||||
compatible = "ti,tilcdc,panel";
|
||||
pinctrl-names = "default";
|
||||
pinctrl-0 = <&bone_lcd3_cape_lcd_pins>;
|
||||
backlight = <&backlight>;
|
||||
enable-gpios = <&gpio3 19 0>;
|
||||
|
||||
panel-info {
|
||||
ac-bias = <255>;
|
||||
ac-bias-intrpt = <0>;
|
||||
dma-burst-sz = <16>;
|
||||
bpp = <16>;
|
||||
fdd = <0x80>;
|
||||
sync-edge = <0>;
|
||||
sync-ctrl = <1>;
|
||||
raster-order = <0>;
|
||||
fifo-th = <0>;
|
||||
};
|
||||
display-timings {
|
||||
native-mode = <&timing0>;
|
||||
timing0: 320x240 {
|
||||
hactive = <320>;
|
||||
vactive = <240>;
|
||||
hback-porch = <21>;
|
||||
hfront-porch = <58>;
|
||||
hsync-len = <47>;
|
||||
vback-porch = <11>;
|
||||
vfront-porch = <23>;
|
||||
vsync-len = <2>;
|
||||
clock-frequency = <8000000>;
|
||||
hsync-active = <0>;
|
||||
vsync-active = <0>;
|
||||
};
|
||||
};
|
||||
};
|
82
doc/device-tree-bindings/video/tilcdc/tilcdc.txt
Normal file
82
doc/device-tree-bindings/video/tilcdc/tilcdc.txt
Normal file
|
@ -0,0 +1,82 @@
|
|||
Device-Tree bindings for tilcdc DRM driver
|
||||
|
||||
Required properties:
|
||||
- compatible: value should be one of the following:
|
||||
- "ti,am33xx-tilcdc" for AM335x based boards
|
||||
- "ti,da850-tilcdc" for DA850/AM18x/OMAP-L138 based boards
|
||||
- interrupts: the interrupt number
|
||||
- reg: base address and size of the LCDC device
|
||||
|
||||
Recommended properties:
|
||||
- ti,hwmods: Name of the hwmod associated to the LCDC
|
||||
|
||||
Optional properties:
|
||||
- max-bandwidth: The maximum pixels per second that the memory
|
||||
interface / lcd controller combination can sustain
|
||||
- max-width: The maximum horizontal pixel width supported by
|
||||
the lcd controller.
|
||||
- max-pixelclock: The maximum pixel clock that can be supported
|
||||
by the lcd controller in KHz.
|
||||
- blue-and-red-wiring: Recognized values "straight" or "crossed".
|
||||
This property deals with the LCDC revision 2 (found on AM335x)
|
||||
color errata [1].
|
||||
- "straight" indicates normal wiring that supports RGB565,
|
||||
BGR888, and XBGR8888 color formats.
|
||||
- "crossed" indicates wiring that has blue and red wires
|
||||
crossed. This setup supports BGR565, RGB888 and XRGB8888
|
||||
formats.
|
||||
- If the property is not present or its value is not recognized
|
||||
the legacy mode is assumed. This configuration supports RGB565,
|
||||
RGB888 and XRGB8888 formats. However, depending on wiring, the red
|
||||
and blue colors are swapped in either 16 or 24-bit color modes.
|
||||
|
||||
Optional nodes:
|
||||
|
||||
- port/ports: to describe a connection to an external encoder. The
|
||||
binding follows Documentation/devicetree/bindings/graph.txt and
|
||||
supports a single port with a single endpoint.
|
||||
|
||||
- See also Documentation/devicetree/bindings/display/tilcdc/panel.txt and
|
||||
Documentation/devicetree/bindings/display/tilcdc/tfp410.txt for connecting
|
||||
tfp410 DVI encoder or lcd panel to lcdc
|
||||
|
||||
[1] There is an errata about AM335x color wiring. For 16-bit color mode
|
||||
the wires work as they should (LCD_DATA[0:4] is for Blue[3:7]),
|
||||
but for 24 bit color modes the wiring of blue and red components is
|
||||
crossed and LCD_DATA[0:4] is for Red[3:7] and LCD_DATA[11:15] is
|
||||
for Blue[3-7]. For more details see section 3.1.1 in AM335x
|
||||
Silicon Errata:
|
||||
http://www.ti.com/general/docs/lit/getliterature.tsp?baseLiteratureNumber=sprz360
|
||||
|
||||
Example:
|
||||
|
||||
fb: fb@4830e000 {
|
||||
compatible = "ti,am33xx-tilcdc", "ti,da850-tilcdc";
|
||||
reg = <0x4830e000 0x1000>;
|
||||
interrupt-parent = <&intc>;
|
||||
interrupts = <36>;
|
||||
ti,hwmods = "lcdc";
|
||||
|
||||
blue-and-red-wiring = "crossed";
|
||||
|
||||
port {
|
||||
lcdc_0: endpoint@0 {
|
||||
remote-endpoint = <&hdmi_0>;
|
||||
};
|
||||
};
|
||||
};
|
||||
|
||||
tda19988: tda19988 {
|
||||
compatible = "nxp,tda998x";
|
||||
reg = <0x70>;
|
||||
|
||||
pinctrl-names = "default", "off";
|
||||
pinctrl-0 = <&nxp_hdmi_bonelt_pins>;
|
||||
pinctrl-1 = <&nxp_hdmi_bonelt_off_pins>;
|
||||
|
||||
port {
|
||||
hdmi_0: endpoint@0 {
|
||||
remote-endpoint = <&lcdc_0>;
|
||||
};
|
||||
};
|
||||
};
|
Loading…
Add table
Reference in a new issue