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auto_select_render_node

pixelflux

Function auto_select_render_node 

Source 
pub(crate) fn auto_select_render_node(token: Option<&str>) -> Option<String>
Expand description

Resolve a usable /dev/dri/renderD* node, optionally matching a vendor/driver token.

Cards under /sys/class/drm are walked in numeric order, skipping cards with no render node (e.g. IPMI/VGA). When /sys/class/drm is unreadable (container without /sys), falls through to scanning /dev/dri directly — that fallback has no device identity so a token request cannot be satisfied there.

§Arguments

  • token - Optional vendor/driver filter: a kernel driver name, PCI vendor ID ("0x10de"), devicetree vendor prefix, or human vendor name ("nvidia", "intel"). None picks the first available node.

§Returns

A /dev/dri/renderD* path, or None if no matching node exists.