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| author | Lionel Landwerlin <lionel.g.landwerlin@intel.com> | 2020-03-24 11:54:57 -0700 |
|---|---|---|
| committer | Lionel Landwerlin <lionel.g.landwerlin@intel.com> | 2020-03-27 13:10:05 +0200 |
| commit | 4ef10fe05ba0b08ce7029c07878afe3c8d5754d8 (patch) | |
| tree | c935b28700a1edf0be5f91b7983235f55bf514e6 /drivers/gpu/drm/i915/i915_perf_types.h | |
| parent | c51dbc6e8f1796d235f308ae365ffc4ad8c54ff9 (diff) | |
drm/i915/perf: add new open param to configure polling of OA buffer
This new parameter let's the application choose how often the OA
buffer should be checked on the CPU side for data availability. Longer
polling period tend to reduce CPU overhead if the application does not
care about somewhat real time data collection.
v2: Allow disabling polling completely with 0 value (Lionel)
v3: Version the new parameter (Joonas)
v4: Rebase (Umesh)
v5: Make poll delay value of 0 invalid (Umesh)
v6:
- Describe poll_oa_period (Ashutosh)
- Fix comment for new poll parameter (Lionel)
- Drop open_flags in read_properties_unlocked (Lionel)
- Rename uapi parameter (Ashutosh)
v7: Reword the comment in uapi (Ashutosh)
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Signed-off-by: Umesh Nerlige Ramappa <umesh.nerlige.ramappa@intel.com>
Reviewed-by: Ashutosh Dixit <ashutosh.dixit@intel.com>
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20200324185457.14635-4-umesh.nerlige.ramappa@intel.com
Diffstat (limited to 'drivers/gpu/drm/i915/i915_perf_types.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_perf_types.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_perf_types.h b/drivers/gpu/drm/i915/i915_perf_types.h index c3ab184c604a..371dcf243622 100644 --- a/drivers/gpu/drm/i915/i915_perf_types.h +++ b/drivers/gpu/drm/i915/i915_perf_types.h @@ -304,6 +304,12 @@ struct i915_perf_stream { * reprogrammed. */ struct i915_vma *noa_wait; + + /** + * @poll_oa_period: The period in nanoseconds at which the OA + * buffer should be checked for available data. + */ + u64 poll_oa_period; }; /** |