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132926b217
When the fence list is empty, host1x_intr_update_hw_state() falls through to host1x_intr_disable_syncpt_intr() which does two MMIO writes to disable the syncpoint interrupt and clear its status. The ISR has already disabled and acked the interrupt before calling host1x_intr_handle_interrupt(), making these two writes redundant. Skip the update_hw_state() call if no fences remain. Measured Syncpoint wait latency (50000 samples): Average latency: 10.6 us -> 9.4 us 99.99 pct latency: 51.90 us -> 36.58 us Signed-off-by: Tanmay Patil <tanmayp@nvidia.com> Acked-by: Mikko Perttunen <mperttunen@nvidia.com> Signed-off-by: Thierry Reding <treding@nvidia.com> Link: https://patch.msgid.link/20260514103153.766343-3-tanmayp@nvidia.com
159 lines
3.8 KiB
159 lines
3.8 KiB