From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon@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 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1483636527==" Return-path: Received: from culpepper.freedesktop.org (unknown [131.252.210.165]) by gabe.freedesktop.org (Postfix) with ESMTP id 048266E62F for ; Mon, 1 Dec 2014 14:34:57 -0800 (PST) In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" To: dri-devel@lists.freedesktop.org List-Id: dri-devel@lists.freedesktop.org --===============1483636527== Content-Type: multipart/alternative; boundary="1417473296.Eb5DEbaA5.20952"; charset="UTF-8" --1417473296.Eb5DEbaA5.20952 Date: Mon, 1 Dec 2014 22:34:56 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" https://bugs.freedesktop.org/show_bug.cgi?id=73338 --- Comment #59 from Alex Deucher --- (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. -- You are receiving this mail because: You are the assignee for the bug. --1417473296.Eb5DEbaA5.20952 Date: Mon, 1 Dec 2014 22:34:56 +0000 MIME-Version: 1.0 Content-Type: text/html; charset="UTF-8"

Comment # 59 on bug 73338 from 
(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.

You are receiving this mail because:
  • You are the assignee for the bug.
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