linux-kernel - [PATCH v3 0/2] drm/panfrost: Wire cycle counters and timestamp info to userspace

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Message-ID: <20240819080224.24914-1-mary.guillemard@collabora.com>
Date: Mon, 19 Aug 2024 10:02:21 +0200
From: Mary Guillemard <mary.guillemard@...labora.com>
To: linux-kernel@...r.kernel.org
Cc: dri-devel@...ts.freedesktop.org,
	kernel@...labora.com,
	Mary Guillemard <mary.guillemard@...labora.com>
Subject: [PATCH v3 0/2] drm/panfrost: Wire cycle counters and timestamp info to userspace

Mali has hardware cycle counters and GPU timestamps available for
profiling.

This patch series adds support for cycle counters propagation and
also new timestamp info parameters.

Those new changes to the uAPI will be used in Mesa to implement
timestamp queries for OpenGL and Vulkan.

The Mesa MR using this series is available here [1].

v2:
- Rewrote to use GPU timestamp register
- Add missing include for arch_timer_get_cntfrq
- Squash job requirement uAPI changes and implementation in one patch
- Simplify changes based on Steven Price comments

v3:
- Address Steven Price comments in the first patch
- Fix a codestyle issue in the second patch and add Steven Price r-b

[1]https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/30553

Mary Guillemard (2):
  drm/panfrost: Add SYSTEM_TIMESTAMP and SYSTEM_TIMESTAMP_FREQUENCY
    parameters
  drm/panfrost: Add cycle counter job requirement

 drivers/gpu/drm/panfrost/panfrost_drv.c  | 45 ++++++++++++++++++++++--
 drivers/gpu/drm/panfrost/panfrost_gpu.c  | 12 +++++++
 drivers/gpu/drm/panfrost/panfrost_gpu.h  |  1 +
 drivers/gpu/drm/panfrost/panfrost_job.c  | 28 +++++++++------
 drivers/gpu/drm/panfrost/panfrost_regs.h |  2 ++
 include/uapi/drm/panfrost_drm.h          |  3 ++
 6 files changed, 78 insertions(+), 13 deletions(-)


base-commit: 3e828c670b0ac8a9564c69f5c5ecf637b22a58d6
-- 
2.46.0