• Ben Skeggs's avatar
    drm/nouveau: add support for MSI · 35fa2f2a
    Ben Skeggs authored
    Only supported on NV50+ so far, and disabled by default currently.  The
    module parameter "msi=1" will enable it.
    There's a kernel bug which will cause this to fail if the module (or the
    NVIDIA binary driver) has ever been loaded before loading nouveau with
    MSI enabled.  As such, this is only safe to enable if you have nouveau
    load on boot, and don't wish to ever reload it.
    The workaround is to "echo 0 > /sys/bus/pci/devices/<device>/enable"
    until the enable count reads 0.  Then you should be able to load nouveau
    with MSI enabled.
    Signed-off-by: default avatarBen Skeggs <bskeggs@redhat.com>