1 .. SPDX-License-Identifier: GPL-2.0+ 1 .. SPDX-License-Identifier: GPL-2.0+
2 2
3 ========================= 3 =========================
4 drm/Panfrost Mali Driver 4 drm/Panfrost Mali Driver
5 ========================= 5 =========================
6 6
7 .. _panfrost-usage-stats: 7 .. _panfrost-usage-stats:
8 8
9 Panfrost DRM client usage stats implementation 9 Panfrost DRM client usage stats implementation
10 ============================================== 10 ==============================================
11 11
12 The drm/Panfrost driver implements the DRM cli 12 The drm/Panfrost driver implements the DRM client usage stats specification as
13 documented in :ref:`drm-client-usage-stats`. 13 documented in :ref:`drm-client-usage-stats`.
14 14
15 Example of the output showing the implemented 15 Example of the output showing the implemented key value pairs and entirety of
16 the currently possible format options: 16 the currently possible format options:
17 17
18 :: 18 ::
19 pos: 0 19 pos: 0
20 flags: 02400002 20 flags: 02400002
21 mnt_id: 27 21 mnt_id: 27
22 ino: 531 22 ino: 531
23 drm-driver: panfrost 23 drm-driver: panfrost
24 drm-client-id: 14 24 drm-client-id: 14
25 drm-engine-fragment: 1846584880 ns 25 drm-engine-fragment: 1846584880 ns
26 drm-cycles-fragment: 1424359409 26 drm-cycles-fragment: 1424359409
27 drm-maxfreq-fragment: 799999987 Hz 27 drm-maxfreq-fragment: 799999987 Hz
28 drm-curfreq-fragment: 799999987 Hz 28 drm-curfreq-fragment: 799999987 Hz
29 drm-engine-vertex-tiler: 71932239 29 drm-engine-vertex-tiler: 71932239 ns
30 drm-cycles-vertex-tiler: 52617357 30 drm-cycles-vertex-tiler: 52617357
31 drm-maxfreq-vertex-tiler: 79999998 31 drm-maxfreq-vertex-tiler: 799999987 Hz
32 drm-curfreq-vertex-tiler: 79999998 32 drm-curfreq-vertex-tiler: 799999987 Hz
33 drm-total-memory: 290 MiB 33 drm-total-memory: 290 MiB
34 drm-shared-memory: 0 MiB 34 drm-shared-memory: 0 MiB
35 drm-active-memory: 226 MiB 35 drm-active-memory: 226 MiB
36 drm-resident-memory: 36496 KiB 36 drm-resident-memory: 36496 KiB
37 drm-purgeable-memory: 128 KiB 37 drm-purgeable-memory: 128 KiB
38 38
39 Possible `drm-engine-` key names are: `fragmen 39 Possible `drm-engine-` key names are: `fragment`, and `vertex-tiler`.
40 `drm-curfreq-` values convey the current opera 40 `drm-curfreq-` values convey the current operating frequency for that engine.
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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