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: Sat, 06 Dec 2014 19:16:45 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1866186003==" Return-path: Received: from culpepper.freedesktop.org (unknown [131.252.210.165]) by gabe.freedesktop.org (Postfix) with ESMTP id 2CEA86E214 for ; Sat, 6 Dec 2014 11:16:46 -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 --===============1866186003== Content-Type: multipart/alternative; boundary="1417893406.BD085.23711"; charset="UTF-8" --1417893406.BD085.23711 Date: Sat, 6 Dec 2014 19:16:46 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" https://bugs.freedesktop.org/show_bug.cgi?id=73338 --- Comment #66 from Martin Peres --- (In reply to Alex Deucher from comment #64) > > As far as percent vs. rpm, I'm not sure which would be preferred. I think > the hwmon subsystem generally prefers rpm. Maybe add callbacks for both > percent and rpm and then check rdev->pm.fan_pulses_per_revolution. If it's > 0, expose it as a percent. if not, expose as rpm. Thoughts? Might be > worth asking on the hwmon mailing lists. No need to guess, everything is written here ;) https://www.kernel.org/doc/Documentation/hwmon/sysfs-interface pwm1 should expose the duty cycle and nothing else. If you also have a tachometer, expose it with fan1_input :) If you want to set the fan speed with RPM instead of the duty cycle, you'll need to use fan1_target. You may wonder what should happen if you set both pwm1 and fan1_target. Well, I would think that the latest you set should take precedence. Please try to stick to the document I provided, for the sake of having a common behaviour. I hope I helped a little on this ;) -- You are receiving this mail because: You are the assignee for the bug. --1417893406.BD085.23711 Date: Sat, 6 Dec 2014 19:16:46 +0000 MIME-Version: 1.0 Content-Type: text/html; charset="UTF-8"

Comment # 66 on bug 73338 from 
(In reply to Alex Deucher from comment #64)
> 
> As far as percent vs. rpm, I'm not sure which would be preferred.  I think
> the hwmon subsystem generally prefers rpm.  Maybe add callbacks for both
> percent and rpm and then check rdev->pm.fan_pulses_per_revolution.  If it's
> 0, expose it as a percent.  if not, expose as rpm.  Thoughts?  Might be
> worth asking on the hwmon mailing lists.

No need to guess, everything is written here ;)
https://www.kernel.org/doc/Documentation/hwmon/sysfs-interface

pwm1 should expose the duty cycle and nothing else. If you also have a
tachometer, expose it with fan1_input :)

If you want to set the fan speed with RPM instead of the duty cycle, you'll
need to use fan1_target. You may wonder what should happen if you set both pwm1
and fan1_target. Well, I would think that the latest you set should take
precedence.

Please try to stick to the document I provided, for the sake of having a common
behaviour. I hope I helped a little on this ;)

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