linux-kernel - [PATCH 0/1] Always record job cycle and timestamp information

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Date: Wed, 14 Feb 2024 12:14:26 +0000
From: Adrián Larumbe <adrian.larumbe@...labora.com>
To: Boris Brezillon <boris.brezillon@...labora.com>,
	Rob Herring <robh@...nel.org>,
	Steven Price <steven.price@....com>,
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
	Maxime Ripard <mripard@...nel.org>,
	Thomas Zimmermann <tzimmermann@...e.de>,
	David Airlie <airlied@...il.com>,
	Daniel Vetter <daniel@...ll.ch>
Cc: Adrián Larumbe <adrian.larumbe@...labora.com>,
	linux-kernel@...r.kernel.org,
	dri-devel@...ts.freedesktop.org
Subject: [PATCH 0/1] Always record job cycle and timestamp information

A driver user expressed interest in being able to access engine usage stats
through fdinfo when debugfs is not built into their kernel. In the current
implementation, this wasn't possible, because it was assumed even for
inflight jobs enabling the cycle counter and timestamp registers would
incur in additional power consumption, so both were kept disabled until
toggled through debugfs.

A second read of the TRM made me think otherwise, but this is something
that would be best clarified by someone from ARM's side.

Adrián Larumbe (1):
  drm/panfrost: Always record job cycle and timestamp information

 drivers/gpu/drm/panfrost/Makefile           |  2 --
 drivers/gpu/drm/panfrost/panfrost_debugfs.c | 21 ------------------
 drivers/gpu/drm/panfrost/panfrost_debugfs.h | 14 ------------
 drivers/gpu/drm/panfrost/panfrost_device.h  |  1 -
 drivers/gpu/drm/panfrost/panfrost_drv.c     |  5 -----
 drivers/gpu/drm/panfrost/panfrost_job.c     | 24 ++++++++-------------
 drivers/gpu/drm/panfrost/panfrost_job.h     |  1 -
 7 files changed, 9 insertions(+), 59 deletions(-)
 delete mode 100644 drivers/gpu/drm/panfrost/panfrost_debugfs.c
 delete mode 100644 drivers/gpu/drm/panfrost/panfrost_debugfs.h


base-commit: 6b1f93ea345947c94bf3a7a6e668a2acfd310918
-- 
2.43.0