From mboxrd@z Thu Jan 1 00:00:00 1970 From: bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org Subject: [Bug 60704] [nouveau, git regression] - I2C PWM fan control broken on nv50 adt7475 on kernels 3.3.x+ Date: Tue, 12 Feb 2013 20:14:37 +0000 Message-ID: References: Mime-Version: 1.0 Content-Type: multipart/mixed; boundary="===============1912056922==" Return-path: In-Reply-To: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: nouveau-bounces+gcfxn-nouveau=m.gmane.org-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org Errors-To: nouveau-bounces+gcfxn-nouveau=m.gmane.org-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org To: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org List-Id: nouveau.vger.kernel.org --===============1912056922== Content-Type: multipart/alternative; boundary="1360700077.B470d2.2953"; charset="us-ascii" --1360700077.B470d2.2953 Date: Tue, 12 Feb 2013 20:14:37 +0000 MIME-Version: 1.0 Content-Type: text/plain; charset="UTF-8" https://bugs.freedesktop.org/show_bug.cgi?id=60704 --- Comment #7 from Emil Velikov --- Created attachment 74708 --> https://bugs.freedesktop.org/attachment.cgi?id=74708&action=edit Use 25kbps datarate for i2c transfers The offending commit has been almost completely reverted later on The only differences being * timeout (5000 > 2200) Data is based on the VESA spec * bitrate (12,5kbps > 50kbps) Bitrate of 50kbps is quite reasonable, considering the standards There are a few possible solutions A select correct delay depending on the i2c port type B presence of adt7475(and other) i2c sensor(s) in the extdev vbios table C use 25kbps for all transfers D quirk it Patch for option C is attached -- You are receiving this mail because: You are the assignee for the bug. --1360700077.B470d2.2953 Date: Tue, 12 Feb 2013 20:14:37 +0000 MIME-Version: 1.0 Content-Type: text/html; charset="UTF-8"

Comment # 7 on bug 60704 from 
Created attachment 74708 [details] [review]
Use 25kbps datarate for i2c transfers

The offending commit has been almost completely reverted later on

The only differences being
* timeout (5000 > 2200)
Data is based on the VESA spec
* bitrate (12,5kbps > 50kbps)
Bitrate of 50kbps is quite reasonable, considering the standards

There are a few possible solutions
A select correct delay depending on the i2c port type
B presence of adt7475(and other) i2c sensor(s) in the extdev vbios table
C use 25kbps for all transfers
D quirk it

Patch for option C is attached

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