When writing some testcases for nonblocking modesets. I found out that the infinite wait on the old fb was causing issues. A nonblocking modeset with a hang on the old fb, followed by a blocking update was enough to trigger it. For old platforms patch 2 is needed else kms_busy.extended-modeset-hang-oldfb-* will put the gpu in a bad state when the 90s in swap_state is reached, for newer platforms patch 3 will fix this. The display doesn't need to be reset when there are no CS flips and no display reset. If you have a newer platform, (gen4+) then the display reset can be simulated with the kms_busy.extended-modeset-hang-oldfb-with-reset-* test. Maarten Lankhorst (3): drm/atomic: Bump timeout for waiting for hw_done to 90s in swap_state drm/i915: Set a timeout when waiting for fence on the old fb drm/i915: Skip modeset locking when atomic pageflips are used. drivers/gpu/drm/drm_atomic_helper.c | 12 ++++++++---- drivers/gpu/drm/i915/intel_display.c | 14 +++++++++++++- 2 files changed, 21 insertions(+), 5 deletions(-) -- 2.7.4 _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
