From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dominik Brodowski Subject: Re: SSDT on Sony VAIO Date: Thu, 16 Jan 2003 20:24:06 +0100 Sender: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Message-ID: <20030116192406.GA2825@brodo.de> References: <20030116165128.GA13608@bungled.net> <000f01c2bd83$e0c50950$134425db@sayonara> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <000f01c2bd83$e0c50950$134425db-F8JvWDuGsZU@public.gmane.org> Errors-To: acpi-devel-admin-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Help: List-Post: List-Subscribe: , List-Unsubscribe: , List-Archive: To: "Adachi, Kenichi" Cc: 'Nathan Conrad' , acpi-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org, andrew.grover-ral2JQCrhuEAvxtiuMwx3w@public.gmane.org List-Id: linux-acpi@vger.kernel.org Hi, On Fri, Jan 17, 2003 at 02:22:42AM +0900, Adachi, Kenichi wrote: > Incidentally I didn't know the existence of CpuFreq project when I made > the above statement. Dominik, if BIOS tells OS via ACPI _PCT to access > FFH to initiate FID/VID change (in AMD PowerNow!), how current code > coordinates it? I'm going to look into code soon, but I'd appreciate > very much if you give me some insight in advance. Currently, it fails with this error message. If you add your patch, frequency transitions will still fail - the ACPI processor driver doesn't know anything about the PowerNow internals. So loading of teh ACPI cpufreq driver will be aborted at latest in acpi_cpufreq_init, if not earlier. So, actually I can't think of any way to use the ACPI processr driver for CPU frequency transitions in these cases - you need to use the "legacy" powernow-k7.c driver instead (which is currently developed by Dave Jones). Dominik ------------------------------------------------------- This SF.NET email is sponsored by: Thawte.com Understand how to protect your customers personal information by implementing SSL on your Apache Web Server. Click here to get our FREE Thawte Apache Guide: http://ads.sourceforge.net/cgi-bin/redirect.pl?thaw0029en