From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Daniel Berlin <dan@cgsoftware.com>
Cc: <linuxppc-dev@lists.linuxppc.org>,
"Kevin B. Hendricks" <khendricks@ivey.uwo.ca>
Subject: Re: DFP support for kernel radeonfb.c added
Date: Wed, 14 Nov 2001 22:24:15 +0100 [thread overview]
Message-ID: <20011114212415.18586@smtp.wanadoo.fr> (raw)
In-Reply-To: <Pine.LNX.4.33.0111141518370.25545-100000@www.cgsoftware.com>
>No, I mean using i2c to grab it.
I think OF uses the Radeon "GPIO" registers to probe the panel type based
on a wired panel ID and a table of EDIDs in the driver. At least, it did
it that way on mach64. I dumped a disassembly of the Rage M3 (r128 base)
MacOS 9 driver of my Pismo and started tracing it, it seem to play with
GPIOs as well. I didn't yet figure out the exact algorithm though.
Ben.
** Sent via the linuxppc-dev mail list. See http://lists.linuxppc.org/
next prev parent reply other threads:[~2001-11-14 21:24 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2001-11-14 17:52 DFP support for kernel radeonfb.c added Kevin B. Hendricks
2001-11-14 18:20 ` Daniel Berlin
2001-11-14 18:28 ` Kevin B. Hendricks
2001-11-14 19:04 ` Daniel Berlin
2001-11-14 20:15 ` Kevin B. Hendricks
2001-11-14 20:19 ` Daniel Berlin
2001-11-14 21:24 ` Benjamin Herrenschmidt [this message]
2001-11-14 21:54 ` Kevin B. Hendricks
2001-11-14 22:14 ` Benjamin Herrenschmidt
2001-11-15 3:13 ` Kevin B. Hendricks
2001-11-15 6:04 ` Daniel Berlin
2001-11-15 12:16 ` Kevin B. Hendricks
2001-11-15 21:51 ` Daniel Berlin
2001-11-15 22:23 ` Kevin B. Hendricks
2001-11-16 13:00 ` Kevin B. Hendricks
2001-11-16 13:47 ` Benjamin Herrenschmidt
2001-11-14 22:14 ` Daniel Berlin
2001-11-14 22:32 ` Kevin B. Hendricks
-- strict thread matches above, loose matches on Subject: below --
2001-11-15 18:23 ghannon
2001-11-15 18:44 ` Kevin Hendricks
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