SDL_HINT_KMSDRM_DEVICE_INDEX - A variable that controls what KMSDRM device to use.

       This hint is available since SDL 3.2.0.

Simple Directmedia Layer                           SDL 3.2.20                    SDL_HINT_KMSDRM_DEVICE_INDEX(3)

       SDL  might  open  something like "/dev/dri/cardNN" to access KMSDRM functionality, where "NN" is a device
       index number. SDL makes a guess at the best index to use (usually zero), but the app or user can set this
       hint to a number between 0 and 99 to force selection.

       This hint should be set before SDL is initialized.

       SDL_HINT_KMSDRM_DEVICE_INDEX - A variable that controls what KMSDRM device to use.

#include<SDL3/SDL_hints.h>#defineSDL_HINT_KMSDRM_DEVICE_INDEX"SDL_KMSDRM_DEVICE_INDEX"