• Eric Anholt's avatar
    drm/vc4: Fix overflow mem unreferencing when the binner runs dry. · 9326e6f2
    Eric Anholt authored
    Overflow memory handling is tricky: While it's still referenced by the
    BPO registers, we want to keep it from being freed.  When we are
    putting a new set of overflow memory in the registers, we need to
    assign the old one to the last rendering job using it.
    
    We were looking at "what's currently running in the binner", but since
    the bin/render submission split, we may end up with the binner
    completing and having no new job while the renderer is still
    processing.  So, if we don't find a bin job at all, look at the
    highest-seqno (last) render job to attach our overflow to.
    Signed-off-by: default avatarEric Anholt <eric@anholt.net>
    Fixes: ca26d28b ("drm/vc4: improve throughput by pipelining binning and rendering jobs")
    Cc: stable@vger.kernel.org
    9326e6f2
vc4_irq.c 7.02 KB