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Open Source and information security mailing list archives
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Date: Sun, 19 Jul 2009 22:18:47 -0400 From: Mark Lord <lkml@....ca> To: Devin Heitmueller <dheitmueller@...nellabs.com> Cc: Steven Toth <stoth@...uxtv.org>, linux-media@...r.kernel.org, Linux Kernel <linux-kernel@...r.kernel.org> Subject: Re: Regression 2.6.31: xc5000 no longer works with Myth-0.21-fixes branch Devin Heitmueller wrote: > > Yeah, the situation with the seven second firmware load time is well > known. It's actually a result of the i2c's implementation in the > au0828 hardware not properly supporting i2c clock stretching. Because > of some bugs in the hardware, I have it clocked down to something like > 30KHz as a workaround. I spent about a week investigating the i2c bus > issue with my logic analyzer, and had to move on to other things. I > documented the gory details here back in March if you really care: .. >From your livejournal comments, it sounded like the slow clock might not be necessary until *after* the firmware transfer. Mmm.. I wonder if perhaps a higher clock speed could be used during the firmware download, and then switch to the slower 30KHz speed afterward ? This could reduce the firmware transfer to a couple of seconds, much better than the current 6-7 second pause. Cheers -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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