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Subject[PATCH v3 0/9] dma-fence: Deadline awareness
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From: Rob Clark <robdclark@chromium.org>

This series adds deadline awareness to fences, so realtime deadlines
such as vblank can be communicated to the fence signaller for power/
frequency management decisions.

This is partially inspired by a trick i915 does, but implemented
via dma-fence for a couple of reasons:

1) To continue to be able to use the atomic helpers
2) To support cases where display and gpu are different drivers

This iteration adds a dma-fence ioctl to set a deadline (both to
support igt-tests, and compositors which delay decisions about which
client buffer to display), and a sw_sync ioctl to read back the
deadline. IGT tests utilizing these can be found at:

https://gitlab.freedesktop.org/robclark/igt-gpu-tools/-/commits/fence-deadline


v1: https://patchwork.freedesktop.org/series/93035/
v2: Move filtering out of later deadlines to fence implementation
to avoid increasing the size of dma_fence
v3: Add support in fence-array and fence-chain; Add some uabi to
support igt tests and userspace compositors.

Rob Clark (9):
dma-fence: Add deadline awareness
drm/vblank: Add helper to get next vblank time
drm/atomic-helper: Set fence deadline for vblank
drm/scheduler: Add fence deadline support
drm/msm: Add deadline based boost support
dma-buf/fence-array: Add fence deadline support
dma-buf/fence-chain: Add fence deadline support
dma-buf/sync_file: Add SET_DEADLINE ioctl
dma-buf/sw_sync: Add fence deadline support

drivers/dma-buf/dma-fence-array.c | 11 ++++
drivers/dma-buf/dma-fence-chain.c | 13 +++++
drivers/dma-buf/dma-fence.c | 20 +++++++
drivers/dma-buf/sw_sync.c | 58 +++++++++++++++++++
drivers/dma-buf/sync_debug.h | 2 +
drivers/dma-buf/sync_file.c | 19 +++++++
drivers/gpu/drm/drm_atomic_helper.c | 36 ++++++++++++
drivers/gpu/drm/drm_vblank.c | 32 +++++++++++
drivers/gpu/drm/msm/msm_fence.c | 76 +++++++++++++++++++++++++
drivers/gpu/drm/msm/msm_fence.h | 20 +++++++
drivers/gpu/drm/msm/msm_gpu.h | 1 +
drivers/gpu/drm/msm/msm_gpu_devfreq.c | 20 +++++++
drivers/gpu/drm/scheduler/sched_fence.c | 34 +++++++++++
drivers/gpu/drm/scheduler/sched_main.c | 2 +-
include/drm/drm_vblank.h | 1 +
include/drm/gpu_scheduler.h | 8 +++
include/linux/dma-fence.h | 16 ++++++
include/uapi/linux/sync_file.h | 20 +++++++
18 files changed, 388 insertions(+), 1 deletion(-)

--
2.31.1

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