On Thu, Aug 23, 2012 at 08:54:08AM +0200, Christian Gmeiner wrote:
2012/8/23 Kevin O'Connor firstname.lastname@example.org:
Why read the i2c and then patch the vgabios - why not just have the vgabios read from i2c directly?
May I need to say that we are talking here about two different i2c buses.
- i2c bus of cs5563
- i2c bus for EDID data transfer - used by VGA
As may panel is connected via LVDS I can not get EDID data from it. So I want to use EPI and EDID extension.
So I would read the i2c eeprom at the cs5536 smb bus and get 3 values. Based on these values I decide which EDID/EPI binary blob I would like to use.
So, why not read the i2c eeprom directly from the vgabios? It seems fragile to build an interface between coreboot and a vgabios just so coreboot can read the eeprom.