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Diffstat (limited to 'Documentation/thermal/nouveau_thermal')
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diff --git a/Documentation/thermal/nouveau_thermal b/Documentation/thermal/nouveau_thermal deleted file mode 100644 index 6e17a11efcb0..000000000000 --- a/Documentation/thermal/nouveau_thermal +++ /dev/null @@ -1,82 +0,0 @@ -Kernel driver nouveau -=================== - -Supported chips: -* NV43+ - -Authors: Martin Peres (mupuf) <martin.peres@free.fr> - -Description ---------- - -This driver allows to read the GPU core temperature, drive the GPU fan and -set temperature alarms. - -Currently, due to the absence of in-kernel API to access HWMON drivers, Nouveau -cannot access any of the i2c external monitoring chips it may find. If you -have one of those, temperature and/or fan management through Nouveau's HWMON -interface is likely not to work. This document may then not cover your situation -entirely. - -Temperature management --------------------- - -Temperature is exposed under as a read-only HWMON attribute temp1_input. - -In order to protect the GPU from overheating, Nouveau supports 4 configurable -temperature thresholds: - - * Fan_boost: Fan speed is set to 100% when reaching this temperature; - * Downclock: The GPU will be downclocked to reduce its power dissipation; - * Critical: The GPU is put on hold to further lower power dissipation; - * Shutdown: Shut the computer down to protect your GPU. - -WARNING: Some of these thresholds may not be used by Nouveau depending -on your chipset. - -The default value for these thresholds comes from the GPU's vbios. These -thresholds can be configured thanks to the following HWMON attributes: - - * Fan_boost: temp1_auto_point1_temp and temp1_auto_point1_temp_hyst; - * Downclock: temp1_max and temp1_max_hyst; - * Critical: temp1_crit and temp1_crit_hyst; - * Shutdown: temp1_emergency and temp1_emergency_hyst. - -NOTE: Remember that the values are stored as milli degrees Celsius. Don't forget -to multiply! - -Fan management ------------- - -Not all cards have a drivable fan. If you do, then the following HWMON -attributes should be available: - - * pwm1_enable: Current fan management mode (NONE, MANUAL or AUTO); - * pwm1: Current PWM value (power percentage); - * pwm1_min: The minimum PWM speed allowed; - * pwm1_max: The maximum PWM speed allowed (bypassed when hitting Fan_boost); - -You may also have the following attribute: - - * fan1_input: Speed in RPM of your fan. - -Your fan can be driven in different modes: - - * 0: The fan is left untouched; - * 1: The fan can be driven in manual (use pwm1 to change the speed); - * 2; The fan is driven automatically depending on the temperature. - -NOTE: Be sure to use the manual mode if you want to drive the fan speed manually - -NOTE2: When operating in manual mode outside the vbios-defined -[PWM_min, PWM_max] range, the reported fan speed (RPM) may not be accurate -depending on your hardware. - -Bug reports ---------- - -Thermal management on Nouveau is new and may not work on all cards. If you have -inquiries, please ping mupuf on IRC (#nouveau, freenode). - -Bug reports should be filled on Freedesktop's bug tracker. Please follow -http://nouveau.freedesktop.org/wiki/Bugs |