diff options
| author | Lionel Landwerlin <[email protected]> | 2020-03-24 11:54:55 -0700 |
|---|---|---|
| committer | Lionel Landwerlin <[email protected]> | 2020-03-27 13:10:03 +0200 |
| commit | d1df41eb72efbd132df5196e265a5fa1165b3255 (patch) | |
| tree | 7bbbfe7fa46cf16bd30f1e7f10b7a46c604aa6c1 /drivers/gpu/drm/i915/display/intel_dp_mst.c | |
| parent | 7bf03e7504e433da274963c447648876902b86df (diff) | |
drm/i915/perf: rework aging tail workaround
We're about to introduce an options to open the perf stream, giving
the user ability to configure how often it wants the kernel to poll
the OA registers for available data.
Right now the workaround against the OA tail pointer race condition
requires at least twice the internal kernel polling timer to make any
data available.
This changes introduce checks on the OA data written into the circular
buffer to make as much data as possible available on the first
iteration of the polling timer.
v2: Use OA_TAKEN macro without the gtt_offset (Lionel)
v3: (Umesh)
- Rebase
- Change report to report32 from below review
https://patchwork.freedesktop.org/patch/330704/?series=66697&rev=1
v4: (Ashutosh, Lionel)
- Fix checkpatch errors
- Fix aging_timestamp initialization
- Check for only one valid landed report
- Fix check for unlanded report
v5: (Ashutosh)
- Fix bug in accurately determining landed report.
- Optimize the check for landed reports by going as far as the
previously determined aged tail.
Signed-off-by: Lionel Landwerlin <[email protected]>
Signed-off-by: Umesh Nerlige Ramappa <[email protected]>
Reviewed-by: Ashutosh Dixit <[email protected]>
Signed-off-by: Lionel Landwerlin <[email protected]>
Link: https://patchwork.freedesktop.org/patch/msgid/[email protected]
Diffstat (limited to 'drivers/gpu/drm/i915/display/intel_dp_mst.c')
0 files changed, 0 insertions, 0 deletions