Lucas Stach f232d9ec02 drm/etnaviv: fix TS cache flushing on GPUs with BLT engine
As seen in the Vivante kernel driver, most GPUs with the BLT engine have
a broken TS cache flush. The workaround is to temporarily set the BLT
command to CLEAR_IMAGE, without actually executing the clear. Apparently
this state change is enough to trigger the required TS cache flush. As
the BLT engine is completely asychronous, we also need a few more stall
states to synchronize the flush with the frontend.

Root-caused-by: Jonathan Marek <jonathan@marek.ca>
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
2020-03-20 18:40:44 +01:00
..
2018-03-09 12:22:37 +01:00
2020-03-03 10:58:57 +01:00