At least GC7000 fails to enter runtime suspend for long periods of time since the MC becomes busy again even when the FE is idle. The rest of the series makes detecting similar issues easier to debug in the future by checking all known bits in debugfs and also warning in the EBUSY case.
Tested on GC7000 with a reduced runtime delay of 50ms. Patches are against next-20200226.
Thanks to Lucas Stach for pointing me in the right direction.
Guido Günther (5): drm/etnaviv: Fix typo in comment drm/etnaviv: Update idle bits drm/etnaviv: Consider all kwnown idle bits in debugfs drm/etnaviv: Ignore MC when checking runtime suspend idleness drm/etnaviv: Warn when GPU doesn't idle fast enough
drivers/gpu/drm/etnaviv/etnaviv_gpu.c | 26 ++++++++++++++++++++++---- drivers/gpu/drm/etnaviv/state_hi.xml.h | 7 +++++++ 2 files changed, 29 insertions(+), 4 deletions(-)