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2015 Sep 19
1
PWM-based voltage management input clock
...s, Martin. I'll try to follow up on this next week and get you an answer. What GPUs have you observed this on?
>
Thanks Andy,
As far as I can tell, it is the case for all GPUs using the PWM-based
voltage management. To be more specific, we have seen this behaviour on
a GK106 (mobile), a GM117 and a GM204.
2015 Sep 18
2
PWM-based voltage management input clock
Hello,
We recently reverse engineered PWM-based voltage management but found an
odity in the input clock frequency for the PWM controller. It seems like
RM is assuming an input clock of 27.648 MHz instead of the actual 27MHz
crystal found on the board.
I thus have the following questions:
- Is it a fixed value hardcoded in RM? (Current way it is done in Nouveau)
- Should we use