Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933325AbXBESg1 (ORCPT ); Mon, 5 Feb 2007 13:36:27 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S933327AbXBESg0 (ORCPT ); Mon, 5 Feb 2007 13:36:26 -0500 Received: from nz-out-0506.google.com ([64.233.162.226]:43158 "EHLO nz-out-0506.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933325AbXBESgX (ORCPT ); Mon, 5 Feb 2007 13:36:23 -0500 DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:user-agent:mime-version:to:cc:subject:references:in-reply-to:x-enigmail-version:content-type:content-transfer-encoding; b=Ngj/mm8vCIh8ILRQ7z52l8+8XcKjnlWQQdhKOPSrizqzIT0G/RgLrkHvSItGAULvLXYy6A2dyQYuDhwuTrmwlU9r4vFcjheECDRKw+kmO9dY5sGBPNHSC5aRj/HjXI8nxkSkyVZeHdg57oe1KLO3hG3z/ph/x6ErP3TEE9sPKeU= Message-ID: <45C77921.4020808@gmail.com> Date: Tue, 06 Feb 2007 03:36:17 +0900 From: Tejun Heo User-Agent: Icedove 1.5.0.9 (X11/20061220) MIME-Version: 1.0 To: Alan CC: Allen Martin , Bartlomiej Zolnierkiewicz , linux-ide@vger.kernel.org, linux-kernel Subject: Re: Nvidia cable detection problems (was [PATCH] amd74xx: don't configure udma mode higher than BIOS did) References: <20070205075836.GG1625@htj.dyndns.org> <20070205112410.5a3c3182@localhost.localdomain> <45C72012.7050605@gmail.com> <20070205132247.6f611e3c@localhost.localdomain> <45C73A3E.6080700@gmail.com> <20070205143439.6962c076@localhost.localdomain> <45C7444F.4070500@gmail.com> <58cb370e0702050709w1b7682dr5dff9e7ce69465a@mail.gmail.com> <20070205181224.3319d6c3@localhost.localdomain> In-Reply-To: <20070205181224.3319d6c3@localhost.localdomain> X-Enigmail-Version: 0.94.1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 980 Lines: 22 Alan wrote: >> The *real* solution is to use the BIOS ACPI _GTM _STM methods for this. >> Then you can remove all chipset specific knowledge from the IDE driver. >> This is what the MS driver does on Windows, so you know it's received a >> lot of testing from NVIDIA and board vendors. > > Well we can certainly do some of that if ACPI is present and active. In > particular since _GTM will give us current modes allowing for hotplug and > post BIOS boot kexec etc it ought to be safe to do Tejun's hack that way. > We could even probe UDMA3+ capable devices by doing _STM to a high mode > and _GTM to determine the cable type 8) Glad to see the problem getting solved. Now that we know the solution, any volunteers? :-) -- tejun - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/