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Linux kernel mirror (for testing)
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1What: /sys/devices/.../hwmon/hwmon<i>/in0_input
2Date: February 2023
3KernelVersion: 6.2
4Contact: intel-gfx@lists.freedesktop.org
5Description: RO. Current Voltage in millivolt.
6
7 Only supported for particular Intel i915 graphics platforms.
8
9What: /sys/devices/.../hwmon/hwmon<i>/power1_max
10Date: February 2023
11KernelVersion: 6.2
12Contact: intel-gfx@lists.freedesktop.org
13Description: RW. Card reactive sustained (PL1/Tau) power limit in microwatts.
14
15 The power controller will throttle the operating frequency
16 if the power averaged over a window (typically seconds)
17 exceeds this limit. A read value of 0 means that the PL1
18 power limit is disabled, writing 0 disables the
19 limit. Writing values > 0 will enable the power limit.
20
21 Only supported for particular Intel i915 graphics platforms.
22
23What: /sys/devices/.../hwmon/hwmon<i>/power1_rated_max
24Date: February 2023
25KernelVersion: 6.2
26Contact: intel-gfx@lists.freedesktop.org
27Description: RO. Card default power limit (default TDP setting).
28
29 Only supported for particular Intel i915 graphics platforms.
30
31What: /sys/devices/.../hwmon/hwmon<i>/power1_max_interval
32Date: February 2023
33KernelVersion: 6.2
34Contact: intel-gfx@lists.freedesktop.org
35Description: RW. Sustained power limit interval (Tau in PL1/Tau) in
36 milliseconds over which sustained power is averaged.
37
38 Only supported for particular Intel i915 graphics platforms.
39
40What: /sys/devices/.../hwmon/hwmon<i>/power1_crit
41Date: February 2023
42KernelVersion: 6.2
43Contact: intel-gfx@lists.freedesktop.org
44Description: RW. Card reactive critical (I1) power limit in microwatts.
45
46 Card reactive critical (I1) power limit in microwatts is exposed
47 for client products. The power controller will throttle the
48 operating frequency if the power averaged over a window exceeds
49 this limit.
50
51 Only supported for particular Intel i915 graphics platforms.
52
53What: /sys/devices/.../hwmon/hwmon<i>/curr1_crit
54Date: February 2023
55KernelVersion: 6.2
56Contact: intel-gfx@lists.freedesktop.org
57Description: RW. Card reactive critical (I1) power limit in milliamperes.
58
59 Card reactive critical (I1) power limit in milliamperes is
60 exposed for server products. The power controller will throttle
61 the operating frequency if the power averaged over a window
62 exceeds this limit.
63
64 Only supported for particular Intel i915 graphics platforms.
65
66What: /sys/devices/.../hwmon/hwmon<i>/energy1_input
67Date: February 2023
68KernelVersion: 6.2
69Contact: intel-gfx@lists.freedesktop.org
70Description: RO. Energy input of device or gt in microjoules.
71
72 For i915 device level hwmon devices (name "i915") this
73 reflects energy input for the entire device. For gt level
74 hwmon devices (name "i915_gtN") this reflects energy input
75 for the gt.
76
77 Only supported for particular Intel i915 graphics platforms.