From: "Ville Syrjälä" <syrjala@sci.fi>
To: fb-devel <linux-fbdev-devel@lists.sourceforge.net>
Subject: Re: EDID through sysfs
Date: Mon, 18 Aug 2003 02:36:50 +0300 [thread overview]
Message-ID: <20030818023650.B16366@sci.fi> (raw)
In-Reply-To: <20030817173407.16010.qmail@web14907.mail.yahoo.com>; from jonsmirl@yahoo.com on Sun, Aug 17, 2003 at 10:34:07AM -0700
On Sun, Aug 17, 2003 at 10:34:07AM -0700, Jon Smirl wrote:
> Does anyone know how other vendors handle the EDID/DDC
> info? Do other cards use I2C?
DDC2 uses I2C. There's aready a module that reads EDID via DDC2 in
lm_sensors. It does require a working i2c adapter driver for the graphics
card. matroxfb has the i2c driver included and lm_sensors has a driver for
voodoo3. Not sure about other cards but maybe that katos driver has
something for ATI cards...
In DDC1 mode the monitor transmits the EDID continuously with vsync acting
as the clock. I don't think that any driver supports DDC1.
--
Ville Syrjälä
syrjala@sci.fi
http://www.sci.fi/~syrjala/
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prev parent reply other threads:[~2003-08-17 23:33 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2003-08-17 6:32 Some thoughts on Rage128/Radeon EDID Jon Smirl
2003-08-17 8:05 ` Benjamin Herrenschmidt
2003-08-17 14:45 ` Kronos
2003-08-17 17:34 ` EDID through sysfs Jon Smirl
2003-08-17 23:36 ` Ville Syrjälä [this message]
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