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727eb1e3f0
Add hwmon support for fan1_input attribute, which will expose fan speed
in RPM. With this in place we can monitor fan speed using lm-sensors tool.
$ sensors
i915-pci-0300
Adapter: PCI adapter
in0: 653.00 mV
fan1: 3833 RPM
power1: N/A (max = 43.00 W)
energy1: 32.02 kJ
v2: Handle overflow, add mutex protection and ABI documentation
Aesthetic adjustments (Riana)
v3: Change rotations data type, ABI date and version
v4: Fix wakeref leak
Drop switch case and simplify hwm_fan_xx() (Andi)
v5: Rework time calculation, aesthetic adjustments (Andy)
v6: Drop redundant overflow logic (Andy)
Split fan_input_read() into dedicated helper (Badal)
v7: Fix undefined reference to __udivdi3 for i386 (Andy)
Signed-off-by: Raag Jadav <raag.jadav@intel.com>
Reviewed-by: Riana Tauro <riana.tauro@intel.com>
Reviewed-by: Andi Shyti <andi.shyti@linux.intel.com>
Reviewed-by: Badal Nilawar <badal.nilawar@intel.com>
Signed-off-by: Anshuman Gupta <anshuman.gupta@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240823034548.2670032-1-raag.jadav@intel.com
86 lines
3.1 KiB
Plaintext
86 lines
3.1 KiB
Plaintext
What: /sys/bus/pci/drivers/i915/.../hwmon/hwmon<i>/in0_input
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Date: February 2023
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KernelVersion: 6.2
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Contact: intel-gfx@lists.freedesktop.org
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Description: RO. Current Voltage in millivolt.
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Only supported for particular Intel i915 graphics platforms.
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What: /sys/bus/pci/drivers/i915/.../hwmon/hwmon<i>/power1_max
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Date: February 2023
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KernelVersion: 6.2
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Contact: intel-gfx@lists.freedesktop.org
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Description: RW. Card reactive sustained (PL1/Tau) power limit in microwatts.
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The power controller will throttle the operating frequency
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if the power averaged over a window (typically seconds)
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exceeds this limit. A read value of 0 means that the PL1
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power limit is disabled, writing 0 disables the
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limit. Writing values > 0 will enable the power limit.
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Only supported for particular Intel i915 graphics platforms.
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What: /sys/bus/pci/drivers/i915/.../hwmon/hwmon<i>/power1_rated_max
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Date: February 2023
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KernelVersion: 6.2
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Contact: intel-gfx@lists.freedesktop.org
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Description: RO. Card default power limit (default TDP setting).
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Only supported for particular Intel i915 graphics platforms.
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What: /sys/bus/pci/drivers/i915/.../hwmon/hwmon<i>/power1_max_interval
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Date: February 2023
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KernelVersion: 6.2
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Contact: intel-gfx@lists.freedesktop.org
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Description: RW. Sustained power limit interval (Tau in PL1/Tau) in
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milliseconds over which sustained power is averaged.
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Only supported for particular Intel i915 graphics platforms.
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What: /sys/bus/pci/drivers/i915/.../hwmon/hwmon<i>/power1_crit
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Date: February 2023
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KernelVersion: 6.2
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Contact: intel-gfx@lists.freedesktop.org
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Description: RW. Card reactive critical (I1) power limit in microwatts.
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Card reactive critical (I1) power limit in microwatts is exposed
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for client products. The power controller will throttle the
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operating frequency if the power averaged over a window exceeds
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this limit.
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Only supported for particular Intel i915 graphics platforms.
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What: /sys/bus/pci/drivers/i915/.../hwmon/hwmon<i>/curr1_crit
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Date: February 2023
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KernelVersion: 6.2
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Contact: intel-gfx@lists.freedesktop.org
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Description: RW. Card reactive critical (I1) power limit in milliamperes.
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Card reactive critical (I1) power limit in milliamperes is
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exposed for server products. The power controller will throttle
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the operating frequency if the power averaged over a window
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exceeds this limit.
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Only supported for particular Intel i915 graphics platforms.
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What: /sys/bus/pci/drivers/i915/.../hwmon/hwmon<i>/energy1_input
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Date: February 2023
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KernelVersion: 6.2
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Contact: intel-gfx@lists.freedesktop.org
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Description: RO. Energy input of device or gt in microjoules.
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For i915 device level hwmon devices (name "i915") this
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reflects energy input for the entire device. For gt level
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hwmon devices (name "i915_gtN") this reflects energy input
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for the gt.
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Only supported for particular Intel i915 graphics platforms.
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What: /sys/bus/pci/drivers/i915/.../hwmon/hwmon<i>/fan1_input
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Date: November 2024
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KernelVersion: 6.12
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Contact: intel-gfx@lists.freedesktop.org
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Description: RO. Fan speed of device in RPM.
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Only supported for particular Intel i915 graphics platforms.
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