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  • Heiko Stuebner's avatar
    lima: add renderonly-based support for lima rockchip · cb69d543
    Heiko Stuebner authored and Qiang Yu's avatar Qiang Yu committed
    
    
    A mesa driver for rockchip is defined which will call into lima when 3D
    rendering is requested from it.
    This uses the renderonly library from mesa, which hides the buffer
    sharing details between the two drivers from the application.
    This allows applications that expect a single device node like
    /dev/dri/card0 (such as kmscube) to run unmodified on Rockchip devices
    that use the rockchip-drm driver for display and have a Mali400 gpu using
    lima.
    
    This follows the model of the lima+sun4i drivers existing in mesa.
    The code implemented here is mostly borrowed from that particular
    implementation.
    
    Rockchip socs use the same drm/kms driver throughout all socs but
    multiple gpus are in use like Mali-Utgard, Mali-Midgard and also
    PowerVR and Vivante.
    To help with this the winsys part is set up to iterate through multiple
    gpus and try each until a valid one is found. Right now of course only
    the Lima-supported GPUs are implemented but it can be easily adapted
    for the other ones, once Mesa drivers are available for them.
    
    Signed-off-by: default avatarHeiko Stuebner <heiko@sntech.de>
    cb69d543