[coreboot] i915tool

Christian Gmeiner christian.gmeiner at gmail.com
Fri Feb 22 08:54:22 CET 2013

2013/2/21 ron minnich <rminnich at gmail.com>:
> I just updated it.
> https://code.google.com/p/i915tool/
> I had to wait, starting some time ago, because there was too much info
> appearing in it about this:
> http://techland.time.com/2013/02/21/googles-chomebook-pixel-the-chromebook-goes-high-end/
> and I got nervous.
> Status: you'll see in as we upstream the coreboot that we can turn on
> graphics in coreboot now without a vbios. The code is crude and I'm in
> the process of creating a replacement. The tool to create the real
> code is in the i915tool and is called gen915code.c. Note that it does
> lot of annotation, turning things like this:
> {W, 1, "", _PIPEACONF, 0x00000040, },
> What this means is that moving to other laptops *may* be easier.
> We've got kernel patches too, and the result is that we've (in an
> experiment) reduced boot time to a login prompt to less than 4 seconds
> (after firmware is finished).
> My goal is to make that better, but we'll see. But we chopped a full 3
> seconds off of boot.
> I am sorry this i915tool is a mess. I really wish it were better. I
> offer it in the state it is because I'm hoping it can be used, but
> it's very experimental and represents a lot of lessons learned the
> hard way. Part of this mess is that my ideas about how to do the work
> have changed so much since I started it.
> Here are docs, which are also not very good, sorry!
> https://docs.google.com/document/d/1g8FMob25VZYxbWri2iFB8YiSL8gwF9vKJH3HGxr0xQU/edit?usp=sharing
> Questions to me. Hope that some part of this is useful.

Christian Gmeiner, MSc

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