Hi, Here is a fourth iteration of the VC4 load tracking series, which was initially developed by Boris Brezillon and that I have now taken over. This new iteration takes in account comments from v3 and comes with a new approach for avoiding underrun reports when reconfiguring the pipeline. It is now based on detection instead of delaying the underrun interrupt unmasking. It can be tested with a dedicated IGT GPU Tools series: VC4 load tracker testing Changes since v3: * Returned IRQ_NONE for short line interrupt to avoid storm; * Made register definitions with per-channel offsets more direct; * cleaned all IRQ fields instead of writing back the status bit as advised by docs; * Reworked first commit's message; * Removed in-commit changelogs with inconsistent revision numbers; * Removed explicit wait for sync before unmasking underrun interrupt; * Checked that the display lists are synced before reporting underrun; Cheers, Paul Boris Brezillon (2): drm/vc4: Report HVS underrun errors drm/vc4: Add a load tracker to prevent HVS underflow errors Paul Kocialkowski (2): drm/vc4: Detect and ignore underruns caused by out-of-sync dlists drm/vc4: Add a debugfs entry to disable/enable the load tracker drivers/gpu/drm/vc4/vc4_debugfs.c | 10 +++ drivers/gpu/drm/vc4/vc4_drv.c | 1 + drivers/gpu/drm/vc4/vc4_drv.h | 32 ++++++++ drivers/gpu/drm/vc4/vc4_hvs.c | 123 ++++++++++++++++++++++++++++++ drivers/gpu/drm/vc4/vc4_kms.c | 116 +++++++++++++++++++++++++++- drivers/gpu/drm/vc4/vc4_plane.c | 57 ++++++++++++++ drivers/gpu/drm/vc4/vc4_regs.h | 51 ++++--------- 7 files changed, 354 insertions(+), 36 deletions(-) -- 2.20.1 _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
