diff options
| author | Ville Syrjälä <[email protected]> | 2016-07-13 16:32:03 +0300 |
|---|---|---|
| committer | Daniel Vetter <[email protected]> | 2016-07-29 21:16:01 +0200 |
| commit | 3b2c1710fac7fb278b760d1545e637cbb5ea5b5b (patch) | |
| tree | a1a406c41ff9757a715d3bd1fc3fd8ff08051705 /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | f15f6ca1e706e11fd07611bd4c7f903625349b33 (diff) | |
drm/i915: Wait up to 3ms for the pcu to ack the cdclk change request on SKL
Bspec tells us to keep bashing the PCU for up to 3ms when trying to
inform it about an upcoming change in the cdclk frequency. Currently
we only keep at it for 15*10usec (+ whatever delays gets added by
the sandybridge_pcode_read() itself). Let's change the limit to 3ms.
I decided to keep 10 usec delay per iteration for now, even though
the spec doesn't really tell us to do that.
Cc: [email protected]
Fixes: 5d96d8afcfbb ("drm/i915/skl: Deinit/init the display at suspend/resume")
Cc: David Weinehall <[email protected]>
Signed-off-by: Ville Syrjälä <[email protected]>
Link: http://patchwork.freedesktop.org/patch/msgid/[email protected]
Tested-by: David Weinehall <[email protected]>
Reviewed-by: Chris Wilson <[email protected]>
(cherry picked from commit 848496e5902833600f7992f4faa82dc1546051ba)
Signed-off-by: Daniel Vetter <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
0 files changed, 0 insertions, 0 deletions