diff options
| author | Mika Kuoppala <[email protected]> | 2016-02-18 17:58:09 +0200 |
|---|---|---|
| committer | Jani Nikula <[email protected]> | 2016-02-22 18:37:43 +0200 |
| commit | 9b18572e83bfd5378b3fcff3acf123f7bddf558a (patch) | |
| tree | 97d8e80f31f5fdf507c4c21c524934a2c290d970 /tools/perf/scripts/python/call-graph-from-postgresql.py | |
| parent | 9b6f20984c5402af06e13cde64b5fe7c31853d1a (diff) | |
drm/i915/gen9: Verify and enforce dc6 state writes
It has been observed that sometimes disabling the dc6 fails
and dc6 state pops back up, brief moment after disabling. This
has to be dmc save/restore timing issue or other bug in the
way dc states are handled.
Try to work around this issue as we don't have firmware fix
yet available. Verify that the value we wrote for the dmc sticks,
and also enforce it by rewriting it, if it didn't.
v2: Zero rereads on rewrite for extra paranoia (Imre)
Testcase: kms_flip/basic-flip-vs-dpms
References: https://bugs.freedesktop.org/show_bug.cgi?id=93768
Cc: Patrik Jakobsson <[email protected]>
Cc: Rodrigo Vivi <[email protected]>
Cc: Imre Deak <[email protected]>
Signed-off-by: Mika Kuoppala <[email protected]>
Reviewed-by: Imre Deak <[email protected]>
Signed-off-by: Imre Deak <[email protected]>
Link: http://patchwork.freedesktop.org/patch/msgid/[email protected]
(cherry picked from commit 779cb5d3ddd72950ec726f86e38f7575c7fbdd4c)
Signed-off-by: Jani Nikula <[email protected]>
Diffstat (limited to 'tools/perf/scripts/python/call-graph-from-postgresql.py')
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