1 .. SPDX-License-Identifier: GPL-2.0+
2
3 =========================
4 drm/Panfrost Mali Driver
5 =========================
6
7 .. _panfrost-usage-stats:
8
9 Panfrost DRM client usage stats implementation
10 ==============================================
11
12 The drm/Panfrost driver implements the DRM cli
13 documented in :ref:`drm-client-usage-stats`.
14
15 Example of the output showing the implemented
16 the currently possible format options:
17
18 ::
19 pos: 0
20 flags: 02400002
21 mnt_id: 27
22 ino: 531
23 drm-driver: panfrost
24 drm-client-id: 14
25 drm-engine-fragment: 1846584880 ns
26 drm-cycles-fragment: 1424359409
27 drm-maxfreq-fragment: 799999987 Hz
28 drm-curfreq-fragment: 799999987 Hz
29 drm-engine-vertex-tiler: 71932239
30 drm-cycles-vertex-tiler: 52617357
31 drm-maxfreq-vertex-tiler: 79999998
32 drm-curfreq-vertex-tiler: 79999998
33 drm-total-memory: 290 MiB
34 drm-shared-memory: 0 MiB
35 drm-active-memory: 226 MiB
36 drm-resident-memory: 36496 KiB
37 drm-purgeable-memory: 128 KiB
38
39 Possible `drm-engine-` key names are: `fragmen
40 `drm-curfreq-` values convey the current opera
41
42 Users must bear in mind that engine and cycle
43 because of power saving concerns. `fdinfo` use
44 query the fdinfo file must make sure to toggle
45 driver by writing into the appropriate sysfs n
46
47 echo <N> > /sys/bus/platform/drivers/panfr
48
49 Where `N` is either `0` or `1`, depending on t
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