From owner-freebsd-multimedia Thu Apr 8 23: 5: 6 1999 Delivered-To: freebsd-multimedia@freebsd.org Received: from fleming.cs.strath.ac.uk (fleming.cs.strath.ac.uk [130.159.196.126]) by hub.freebsd.org (Postfix) with ESMTP id 2D51414C21; Thu, 8 Apr 1999 23:05:01 -0700 (PDT) (envelope-from roger@cs.strath.ac.uk) Received: from cs.strath.ac.uk (scary.dmem.strath.ac.uk [130.159.202.5]) by fleming.cs.strath.ac.uk (8.8.8/8.8.8) with ESMTP id HAA01684 Fri, 9 Apr 1999 07:02:34 +0100 (BST) Message-ID: <370D9821.2E646AA4@cs.strath.ac.uk> Date: Fri, 09 Apr 1999 07:03:13 +0100 From: Roger Hardiman Organization: Strathclyde University X-Mailer: Mozilla 4.04 [en] (X11; I; FreeBSD 3.1-STABLE i386) MIME-Version: 1.0 To: Wes Peters Cc: Nate Williams , hackers@FreeBSD.ORG, multimedia@FreeBSD.ORG Subject: Re: Bt848 corruption since upgrading to 3.1. Has DMA code changed? References: <370CB2DC.709E7CEA@cs.strath.ac.uk> <370CAA37.3645E2B9@softweyr.com> <370CD277.E9A64E04@cs.strath.ac.uk> <199904081837.MAA28461@mt.sri.com> <370D039D.FC2D907A@softweyr.com> Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit Sender: owner-freebsd-multimedia@FreeBSD.ORG Precedence: bulk X-Loop: FreeBSD.org Wes > Other than that, I have no help to offer. Do you know for sure where it > dies? I tracked down the problem in fxp with some simple printfs, and > then several someones on -hackers pointed out the fix. It does not die. The DMA transfers continue, but there is corruption. There is nothing to add to the driver. The bt848 does all the mastering itself. It takes control of the bus and does the transfer all by itself, for every video frame received. Bye Roger -- Roger Hardiman Strathclyde Uni Telepresence Research Group, Glasgow, Scotland. http://telepresence.dmem.strath.ac.uk 0141 548 2897 roger@cs.strath.ac.uk To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-multimedia" in the body of the message