![]() ![]() KMS interface (Kernel Mode Setting, part of the Direct Rendering Manager (DRM) interface, kernel argument, through Xorg/RandR using modesetting driver).fbdev interface (fbset utility or kernel argument, internal modedb).Depending on the display controller and driver used, different ways of configuring the mode are available. In Linux, various subsystems deal with display modes. If there are multiple display modes available (either through EDID/DDC or multiple display modes specified for an embedded display), the system allows choosing between them. Display modes from a specific devicetree overlay (for BSP 5.x and newer).Display modes from a display driver (used for kernel mode settings (KMS) e.g.Display modes provided through modedb entry or calculated video modes (e.g.Display modes as part of the device tree (display-timings node, e.g.Display modes provided through machine-specific code (arch/arm/mach., e.g.You can learn more about it on the Device Tree Overlays (Linux) Technical Article provided by Toradex.Įmbedded displays without DDC channel (parallel RGB/LVDS) use a fixed mode provided by the driver, this can be either: As for the current BSP 5.x, the boot partition is mounted on: /boot/. The most straightforward way to do that is to edit the overlays.txt file available on the boot partition of the board. Therefore, to use them, one should apply the required Device Tree Overlay. In version 5.x of the Reference Images for Yocto Project, most display interfaces don't enable in the Linux Device Tree by default.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |