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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 | .. SPDX-License-Identifier: GPL-2.0+ ========================= drm/Panthor CSF driver ========================= .. _panthor-usage-stats: Panthor DRM client usage stats implementation ============================================== The drm/Panthor driver implements the DRM client usage stats specification as documented in :ref:`drm-client-usage-stats`. Example of the output showing the implemented key value pairs and entirety of the currently possible format options: :: pos: 0 flags: 02400002 mnt_id: 29 ino: 491 drm-driver: panthor drm-client-id: 10 drm-engine-panthor: 111110952750 ns drm-cycles-panthor: 94439687187 drm-maxfreq-panthor: 1000000000 Hz drm-curfreq-panthor: 1000000000 Hz drm-total-memory: 16480 KiB drm-shared-memory: 0 drm-active-memory: 16200 KiB drm-resident-memory: 16480 KiB drm-purgeable-memory: 0 Possible `drm-engine-` key names are: `panthor`. `drm-curfreq-` values convey the current operating frequency for that engine. Users must bear in mind that engine and cycle sampling are disabled by default, because of power saving concerns. `fdinfo` users and benchmark applications which query the fdinfo file must make sure to toggle the job profiling status of the driver by writing into the appropriate sysfs node:: echo <N> > /sys/bus/platform/drivers/panthor/[a-f0-9]*.gpu/profiling Where `N` is a bit mask where cycle and timestamp sampling are respectively enabled by the first and second bits. |