Merge branch 'drm-etnaviv-next' of git://git.pengutronix.de/git/lst/linux into drm...

Notable changes:
- correctness fixes to the GPU cache flushing when switching execution
state and when powering down the GPU
- reduction of time spent in hardirq-off context
- placement improvements to the GPU DMA linear window, allowing the
driver to properly work on i.MX6 systems with more than 2GB of RAM

* 'drm-etnaviv-next' of git://git.pengutronix.de/git/lst/linux:
  drm: etnaviv: clean up submit_bo()
  drm: etnaviv: clean up vram_mapping submission/retire path
  drm: etnaviv: improve readability of command insertion to ring buffer
  drm: etnaviv: clean up GPU command submission
  drm: etnaviv: use previous GPU pipe state when pipe switching
  drm: etnaviv: flush all GPU caches when stopping GPU
  drm: etnaviv: track current execution state
  drm: etnaviv: extract arming of semaphore
  drm: etnaviv: extract replacement of WAIT command
  drm: etnaviv: extract command ring reservation
  drm/etnaviv: move GPU linear window to end of DMA window
  drm/etnaviv: move runtime PM balance into retire worker