[PATCH v3 0/9] dma-fence: Deadline awareness

From: Rob Clark <robdclark@gmail.com>
To: dri-devel@lists.freedesktop.org, linaro-mm-sig@lists.linaro.org
Cc: "Daniel Vetter" <daniel@ffwll.ch>,
	"Christian König" <ckoenig.leichtzumerken@gmail.com>,
	"Michel Dänzer" <michel@daenzer.net>,
	"Pekka Paalanen" <ppaalanen@gmail.com>,
	"Rob Clark" <robdclark@chromium.org>,
	"Alex Deucher" <alexander.deucher@amd.com>,
	"Andrey Grodzovsky" <andrey.grodzovsky@amd.com>,
	"Boris Brezillon" <boris.brezillon@collabora.com>,
	"Christian König" <christian.koenig@amd.com>,
	"Daniel Vetter" <daniel.vetter@ffwll.ch>,
	freedreno@lists.freedesktop.org (open list:DRM DRIVER FOR MSM
	ADRENO GPU), "Gustavo Padovan" <gustavo@padovan.org>,
	"Jack Zhang" <Jack.Zhang1@amd.com>,
	linux-arm-msm@vger.kernel.org (open list:DRM DRIVER FOR MSM
	ADRENO GPU), linux-kernel@vger.kernel.org (open list),
	linux-media@vger.kernel.org (open list:DMA BUFFER SHARING
	FRAMEWORK), "Luben Tuikov" <luben.tuikov@amd.com>,
	"Melissa Wen" <mwen@igalia.com>,
	"Steven Price" <steven.price@arm.com>,
	"Tian Tao" <tiantao6@hisilicon.com>
Subject: [PATCH v3 0/9] dma-fence: Deadline awareness
Date: Fri,  3 Sep 2021 11:47:51 -0700	[thread overview]
Message-ID: <20210903184806.1680887-1-robdclark@gmail.com> (raw)

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