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From: bugzilla-daemon@freedesktop.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 73338] Fan speed in idle at 40% with radeonsi and at 18% with catalyst
Date: Mon, 01 Dec 2014 22:34:56 +0000	[thread overview]
Message-ID: <bug-73338-502-NkUTXBREw3@http.bugs.freedesktop.org/> (raw)
In-Reply-To: <bug-73338-502@http.bugs.freedesktop.org/>


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https://bugs.freedesktop.org/show_bug.cgi?id=73338

--- Comment #59 from Alex Deucher <alexdeucher@gmail.com> ---
(In reply to Chernovsky Oleg from comment #58)
> Can you elaborate on what each bit of this control register means? Maybe I
> just can't into abbreviations :)

TMIN - temp at which the fan would be turned on
FDO_PWM_MODE - which PWM mode to use:
0 - static PWM based on fuse value
1 - static PWM based on CG_FDO_CTRL0.FDO_STATIC_DUTY value
2 - dynamic PWM
5 - static PWM based on RPM CG_TACH_CTRL.TARGET_PERIOD value
TACH_PWM_RESP_RATE - amount to adjust PWM in tach mode

As far as I know, only values 1 and 5 are used for FDO_PWM_MODE in the driver
for manual control.  I'm not sure what dynamic PWM (2) means or how it works. 
It might be used by the smc for fan control.

I also noticed a minor error in the RPM control setup, and I've pushed a patch
to my 3.19-wip branch.

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  parent reply	other threads:[~2014-12-01 22:34 UTC|newest]

Thread overview: 87+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <bug-73338-502@http.bugs.freedesktop.org/>
2014-01-06 23:35 ` [Bug 73338] Fan speed in idle at 40% with radeonsi and at 18% with catalyst bugzilla-daemon
2014-03-05 12:50 ` bugzilla-daemon
2014-04-09 11:41 ` bugzilla-daemon
2014-04-24 16:29 ` bugzilla-daemon
2014-05-08 21:47 ` bugzilla-daemon
2014-05-28 14:47 ` bugzilla-daemon
2014-06-10 17:22 ` bugzilla-daemon
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2014-07-16  2:31 ` bugzilla-daemon
2014-07-16 19:56 ` bugzilla-daemon
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2014-12-01 22:34 ` bugzilla-daemon [this message]
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