DART-MX8M-MINI Display: Difference between revisions
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--> {{PageHeader|{{#var:HARDWARE_NAME}} Display}} {{DocImage|category1=Yocto|category2=Debian}}[[Category:{{#var:HARDWARE_NAME}}]]__toc__ | |||
= Introduction = | = Introduction = | ||
== MIPI-DSI and LVDS == | == MIPI-DSI and LVDS == | ||
{{#var:HARDWARE_NAME}} SoC supports MIPI-DSI interface. {{#var:HARDWARE_NAME}} can be optionally equipped with SN65DSI84 MIPI-DSI to LVDS bridge.<br> | |||
{{#var:HARDWARE_NAME}} carrier board comes with LVDS connectors, so you can easily connect LVDS display.<br> | |||
Connecting MIPI-DSI display to | Connecting MIPI-DSI display to {{#var:HARDWARE_NAME}} carrier board requires designing a custom connector.<br> | ||
= Adding custom LVDS panel = | = Adding custom LVDS panel = | ||
{{#var:HARDWARE_NAME}} evaluation kit comes with 800x480 LCD panel. {{#var:HARDWARE_NAME}} DTS file was created with this panel in mind. | |||
To support your custom LVDS panel, you should make several modifications | To support your custom LVDS panel, you should make several modifications | ||
== Referencing custom panel in the DTS file == | == Referencing custom panel in the DTS file == | ||
The following code references Variscite panel in arch/arm64/boot/dts/freescale/ | The following code references Variscite panel in arch/arm64/boot/dts/freescale/{{#replace:{{#var:DEFAULT_DTB}}|.dtb|.dts}} under kernel source tree | ||
{{#ifeq: {{#var:KERNEL_USE_COMMUNITY_DRV_SN65DSI83}}|true| | |||
<pre> | |||
&panel_lvds { | |||
compatible = "panel-lvds"; | |||
data-mapping = "jeida-24"; | |||
width-mm = <154>; | |||
height-mm = <87>; | |||
panel-timing { | |||
clock-frequency = <39000000>; | |||
hactive = <800>; | |||
vactive = <480>; | |||
hback-porch = <40>; | |||
hfront-porch = <40>; | |||
vback-porch = <29>; | |||
vfront-porch = <13>; | |||
hsync-len = <48>; | |||
vsync-len = <3>; | |||
hsync-active = <0>; | |||
vsync-active = <0>; | |||
de-active = <1>; | |||
pixelclk-active = <0>; | |||
}; | |||
}; | |||
</pre> | |||
You should modify the "data-mapping", "width-mm", "height-mm" and "display-timings" properties to match your panel specification and rebuild the DTB file. | |||
| | |||
<pre> | <pre> | ||
dsi_lvds_bridge: sn65dsi84@2c { | dsi_lvds_bridge: sn65dsi84@2c { | ||
| Line 48: | Line 81: | ||
</pre> | </pre> | ||
You should modify "ti,dsi-lanes", "ti,lvds-format" "ti,lvds-bpp", "ti,width-mm", "ti,height-mm" and display-timings properties to match your panel and rebuild the DTB file. | You should modify the "ti,dsi-lanes", "ti,lvds-format", "ti,lvds-bpp", "ti,width-mm", "ti,height-mm" and "display-timings" properties to match your panel specification and rebuild the DTB file.<br> | ||
To support a dual channel LVDS panel, please add "ti,lvds-channels = <2>". | |||
}} | |||
= Rotating the Weston display = | |||
{{WESTON_DISPLAY_ROTATE}} | |||
Latest revision as of 17:37, 20 March 2024
This page is using the default release RELEASE_SUMO_V1.1_DART-MX8M-MINI.
To view this page for a specific Variscite SoM and software release, please follow these steps:
- Visit variwiki.com
- Select your SoM
- Select the software release
Introduction
MIPI-DSI and LVDS
DART-MX8M-MINI SoC supports MIPI-DSI interface. DART-MX8M-MINI can be optionally equipped with SN65DSI84 MIPI-DSI to LVDS bridge.
DART-MX8M-MINI carrier board comes with LVDS connectors, so you can easily connect LVDS display.
Connecting MIPI-DSI display to DART-MX8M-MINI carrier board requires designing a custom connector.
Adding custom LVDS panel
DART-MX8M-MINI evaluation kit comes with 800x480 LCD panel. DART-MX8M-MINI DTS file was created with this panel in mind. To support your custom LVDS panel, you should make several modifications
Referencing custom panel in the DTS file
The following code references Variscite panel in arch/arm64/boot/dts/freescale/fsl-imx8mm-var-dart.dts under kernel source tree
dsi_lvds_bridge: sn65dsi84@2c {
compatible = "ti,sn65dsi83";
reg = <0x2c>;
ti,dsi-lanes = <1>;
ti,lvds-format = <1>;
ti,lvds-bpp = <24>;
ti,width-mm = <154>;
ti,height-mm = <87>;
enable-gpios = <&gpio2 11 GPIO_ACTIVE_HIGH>;
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_lvds>;
status = "okay";
display-timings {
lvds {
clock-frequency = <33000000>;
hactive = <800>;
vactive = <480>;
hback-porch = <40>;
hfront-porch = <40>;
vback-porch = <29>;
vfront-porch = <13>;
hsync-len = <48>;
vsync-len = <3>;
hsync-active = <0>;
vsync-active = <0>;
de-active = <1>;
pixelclk-active = <0>;
};
};
...
};
You should modify the "ti,dsi-lanes", "ti,lvds-format", "ti,lvds-bpp", "ti,width-mm", "ti,height-mm" and "display-timings" properties to match your panel specification and rebuild the DTB file.
To support a dual channel LVDS panel, please add "ti,lvds-channels = <2>".
Rotating the Weston display
To rotate the Weston display, edit /etc/xdg/weston/weston.ini.
For example, rotate the display 90 degrees:
[output] name=DSI-1 transform=90
For more information, see the weston man pages: