diff options
| author | Eric Anholt <eric@anholt.net> | 2011-12-22 23:55:00 +0100 |
|---|---|---|
| committer | Keith Packard <keithp@keithp.com> | 2012-01-03 18:31:15 +0100 |
| commit | 42ff6572e5a4a7414330a4ca91f0335da67deca9 (patch) | |
| tree | dc8937a9bd595065cd73cd51a4baab365a96813b /fs/select.c | |
| parent | drm/i915: Do the fallback non-IRQ wait in ring throttle, too. (diff) | |
| download | linux-42ff6572e5a4a7414330a4ca91f0335da67deca9.tar.xz linux-42ff6572e5a4a7414330a4ca91f0335da67deca9.zip | |
drm/i915: Work around gen7 BLT ring synchronization issues.
Previous to this commit, testing easily reproduced a failure where the
seqno would apparently arrive after the IRQ associated with it, with test programs as simple as:
for (;;) {
glCopyPixels(0, 0, 1, 1);
glFinish();
}
Various workarounds we've seen for previous generations didn't work to
fix this issue, so until new information comes in, replace the IRQ
waits on the BLT ring with polling.
Signed-off-by: Eric Anholt <eric@anholt.net>
Tested-by: Eugeni Dodonov <eugeni.dodonov@intel.com>
Reviewed-by: Eugeni Dodonov <eugeni.dodonov@intel.com>
Acked-by: Kenneth Graunke <kenneth@whitecape.org>
Signed-off-by: Keith Packard <keithp@keithp.com>
Diffstat (limited to 'fs/select.c')
0 files changed, 0 insertions, 0 deletions