1 =========================================== 1 ===========================================
2 GPU Power/Thermal Controls and Monitoring 2 GPU Power/Thermal Controls and Monitoring
3 =========================================== 3 ===========================================
4 4
5 HWMON Interfaces 5 HWMON Interfaces
6 ================ 6 ================
7 7
8 .. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_ 8 .. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_pm.c
9 :doc: hwmon 9 :doc: hwmon
10 10
11 GPU sysfs Power State Interfaces 11 GPU sysfs Power State Interfaces
12 ================================ 12 ================================
13 13
14 GPU power controls are exposed via sysfs files 14 GPU power controls are exposed via sysfs files.
15 15
16 power_dpm_state 16 power_dpm_state
17 --------------- 17 ---------------
18 18
19 .. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_ 19 .. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_pm.c
20 :doc: power_dpm_state 20 :doc: power_dpm_state
21 21
22 power_dpm_force_performance_level 22 power_dpm_force_performance_level
23 --------------------------------- 23 ---------------------------------
24 24
25 .. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_ 25 .. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_pm.c
26 :doc: power_dpm_force_performance_level 26 :doc: power_dpm_force_performance_level
27 27
28 pp_table 28 pp_table
29 -------- 29 --------
30 30
31 .. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_ 31 .. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_pm.c
32 :doc: pp_table 32 :doc: pp_table
33 33
34 pp_od_clk_voltage 34 pp_od_clk_voltage
35 ----------------- 35 -----------------
36 36
37 .. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_ 37 .. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_pm.c
38 :doc: pp_od_clk_voltage 38 :doc: pp_od_clk_voltage
39 39
40 pp_dpm_* 40 pp_dpm_*
41 -------- 41 --------
42 42
43 .. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_ 43 .. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_pm.c
44 :doc: pp_dpm_sclk pp_dpm_mclk pp_dpm_socclk 44 :doc: pp_dpm_sclk pp_dpm_mclk pp_dpm_socclk pp_dpm_fclk pp_dpm_dcefclk pp_dpm_pcie
45 45
46 pp_power_profile_mode 46 pp_power_profile_mode
47 --------------------- 47 ---------------------
48 48
49 .. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_ 49 .. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_pm.c
50 :doc: pp_power_profile_mode 50 :doc: pp_power_profile_mode
51 51
52 pm_policy <<
53 --------------------- <<
54 <<
55 .. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_ <<
56 :doc: pm_policy <<
57 <<
58 \*_busy_percent 52 \*_busy_percent
59 --------------- 53 ---------------
60 54
61 .. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_ 55 .. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_pm.c
62 :doc: gpu_busy_percent 56 :doc: gpu_busy_percent
63 57
64 .. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_ 58 .. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_pm.c
65 :doc: mem_busy_percent 59 :doc: mem_busy_percent
66 60
67 gpu_metrics 61 gpu_metrics
68 ----------- 62 -----------
69 63
70 .. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_ 64 .. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_pm.c
71 :doc: gpu_metrics 65 :doc: gpu_metrics
72 66
73 fan_curve 67 fan_curve
74 --------- 68 ---------
75 69
76 .. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_ 70 .. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_pm.c
77 :doc: fan_curve 71 :doc: fan_curve
78 72
79 acoustic_limit_rpm_threshold 73 acoustic_limit_rpm_threshold
80 ---------------------------- 74 ----------------------------
81 75
82 .. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_ 76 .. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_pm.c
83 :doc: acoustic_limit_rpm_threshold 77 :doc: acoustic_limit_rpm_threshold
84 78
85 acoustic_target_rpm_threshold 79 acoustic_target_rpm_threshold
86 ----------------------------- 80 -----------------------------
87 81
88 .. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_ 82 .. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_pm.c
89 :doc: acoustic_target_rpm_threshold 83 :doc: acoustic_target_rpm_threshold
90 84
91 fan_target_temperature 85 fan_target_temperature
92 ---------------------- 86 ----------------------
93 87
94 .. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_ 88 .. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_pm.c
95 :doc: fan_target_temperature 89 :doc: fan_target_temperature
96 90
97 fan_minimum_pwm 91 fan_minimum_pwm
98 --------------- 92 ---------------
99 93
100 .. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_ 94 .. kernel-doc:: drivers/gpu/drm/amd/pm/amdgpu_pm.c
101 :doc: fan_minimum_pwm 95 :doc: fan_minimum_pwm
102 96
103 GFXOFF 97 GFXOFF
104 ====== 98 ======
105 99
106 GFXOFF is a feature found in most recent GPUs 100 GFXOFF is a feature found in most recent GPUs that saves power at runtime. The
107 card's RLC (RunList Controller) firmware power 101 card's RLC (RunList Controller) firmware powers off the gfx engine
108 dynamically when there is no workload on gfx o 102 dynamically when there is no workload on gfx or compute pipes. GFXOFF is on by
109 default on supported GPUs. 103 default on supported GPUs.
110 104
111 Userspace can interact with GFXOFF through a d 105 Userspace can interact with GFXOFF through a debugfs interface (all values in
112 `uint32_t`, unless otherwise noted): 106 `uint32_t`, unless otherwise noted):
113 107
114 ``amdgpu_gfxoff`` 108 ``amdgpu_gfxoff``
115 ----------------- 109 -----------------
116 110
117 Use it to enable/disable GFXOFF, and to check 111 Use it to enable/disable GFXOFF, and to check if it's current enabled/disabled::
118 112
119 $ xxd -l1 -p /sys/kernel/debug/dri/0/amdgpu_ 113 $ xxd -l1 -p /sys/kernel/debug/dri/0/amdgpu_gfxoff
120 01 114 01
121 115
122 - Write 0 to disable it, and 1 to enable it. 116 - Write 0 to disable it, and 1 to enable it.
123 - Read 0 means it's disabled, 1 it's enabled. 117 - Read 0 means it's disabled, 1 it's enabled.
124 118
125 If it's enabled, that means that the GPU is fr 119 If it's enabled, that means that the GPU is free to enter into GFXOFF mode as
126 needed. Disabled means that it will never ente 120 needed. Disabled means that it will never enter GFXOFF mode.
127 121
128 ``amdgpu_gfxoff_status`` 122 ``amdgpu_gfxoff_status``
129 ------------------------ 123 ------------------------
130 124
131 Read it to check current GFXOFF's status of a 125 Read it to check current GFXOFF's status of a GPU::
132 126
133 $ xxd -l1 -p /sys/kernel/debug/dri/0/amdgpu_ 127 $ xxd -l1 -p /sys/kernel/debug/dri/0/amdgpu_gfxoff_status
134 02 128 02
135 129
136 - 0: GPU is in GFXOFF state, the gfx engine is 130 - 0: GPU is in GFXOFF state, the gfx engine is powered down.
137 - 1: Transition out of GFXOFF state 131 - 1: Transition out of GFXOFF state
138 - 2: Not in GFXOFF state 132 - 2: Not in GFXOFF state
139 - 3: Transition into GFXOFF state 133 - 3: Transition into GFXOFF state
140 134
141 If GFXOFF is enabled, the value will be transi 135 If GFXOFF is enabled, the value will be transitioning around [0, 3], always
142 getting into 0 when possible. When it's disabl 136 getting into 0 when possible. When it's disabled, it's always at 2. Returns
143 ``-EINVAL`` if it's not supported. 137 ``-EINVAL`` if it's not supported.
144 138
145 ``amdgpu_gfxoff_count`` 139 ``amdgpu_gfxoff_count``
146 ----------------------- 140 -----------------------
147 141
148 Read it to get the total GFXOFF entry count at 142 Read it to get the total GFXOFF entry count at the time of query since system
149 power-up. The value is an `uint64_t` type, how 143 power-up. The value is an `uint64_t` type, however, due to firmware limitations,
150 it can currently overflow as an `uint32_t`. *O 144 it can currently overflow as an `uint32_t`. *Only supported in vangogh*
151 145
152 ``amdgpu_gfxoff_residency`` 146 ``amdgpu_gfxoff_residency``
153 --------------------------- 147 ---------------------------
154 148
155 Write 1 to amdgpu_gfxoff_residency to start lo 149 Write 1 to amdgpu_gfxoff_residency to start logging, and 0 to stop. Read it to
156 get average GFXOFF residency % multiplied by 1 150 get average GFXOFF residency % multiplied by 100 during the last logging
157 interval. E.g. a value of 7854 means 78.54% of 151 interval. E.g. a value of 7854 means 78.54% of the time in the last logging
158 interval the GPU was in GFXOFF mode. *Only sup 152 interval the GPU was in GFXOFF mode. *Only supported in vangogh*
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