Date: Thu, 08 Apr 1999 14:45:00 +0100 From: Roger Hardiman <roger@cs.strath.ac.uk> To: hackers@freebsd.org, multimedia@freebsd.org Subject: Bt848 corruption since upgrading to 3.1. Has DMA code changed? Message-ID: <370CB2DC.709E7CEA@cs.strath.ac.uk>
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Hi, Several people (including Luigi) have reported that video capture with the bt848 driver is not working right since they upgraded from 2.2.6 or 2.2.8 to 3.1-release Luigi and I noticed the problem in VIC (lots of horizontal lines in the image) and others have rpeorted FXTV problems. It looks like a DMA problem. The DMA is either timing out or the bus mastering is failing or the DMA transfer data is getting corrupted. Nothing has changed in the bt848 driver in this area since 2.2.x and I tested with the vic from 2.2.6 a.out format pkg_add. It looks like something has changed in the kernel's PCI bus setup code. Does anyone know what is different in the 3.x kernel (compared to the 2.2.x kernel) which could be causing this corruption. HELP! Roger -- Roger Hardiman Strathclyde Uni Telepresence Research Group, Glasgow, Scotland. http://telepresence.dmem.strath.ac.uk 0141 548 2897 roger@cs.strath.ac.uk roger@freebsd.org To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-multimedia" in the body of the message
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