To correct, it's 5.4-rc6 plus these patches:
https://cgit.freedesktop.org/~agd5f/linux/diff/?h=drm-fixes-5.4-2019-11-06&id=2c409ba81be25516afe05ae27a4a15da01740b01&id2=a99d8080aaf358d5d23581244e5da23b35e340b9