mgag200 disable write combine on rt
JIRA: https://issues.redhat.com/browse/RHEL-28760
Depends: !3977 (merged)
Unfortunately, the G200 ioburst workaround doesn't work on some servers like Dell poweredge XR11, XR5610, or HPE XL260 In this case completely disabling WC is the only option to achieve low-latency. Replacing DRM_MGAG200_IOBURT_WORKAROUND with DRM_MGAG200_DISABLE_WRITECOMBINE
These options are only available if PREEMPT_RT is set, so this change only affect the rt-kernel
Signed-off-by: Jocelyn Falempe jfalempe@redhat.com
Edited by Jocelyn Falempe