[coreboot] backlight controls working on X60 without vga option ROM (using native graphics instead)

[The Gluglug]

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tested also on X60t (1024x768). Works.

samnob: can you test coreboot (with change 5320 from gerrit) and then
run that command on your X60t:

 sudo devmem2 0xe4361254 w 0x879F879E

And tell me if backlight controls (using the Fn keys) work or not?

On 16/05/14 00:10, The Gluglug wrote:
> phcoder and moosbart, could you also try this on your macbook21's
> ?
> 
> On 16/05/14 00:02, The Gluglug wrote:
>> For T60 (Intel GPU. Mine is 15" version): sudo  devmem2
>> 0xe4361254 w 0x58BF58BE
> 
>> <fchmmr> I read from that address using this command: sudo 
>> devmem2 0xe4361254 w <fchmmr> I did that on my T60 running
>> Lenovo BIOS and get this: 0xFFFFFFFF <fchmmr> I did that on my
>> T60 (same one) running coreboot with vgarom and get this:
>> 0x58BF58BE <fchmmr> With libreboot on a T60 (when native graphics
>> is made to work, which at the moment it doesn't) you will instead
>> do this: <fchmmr> sudo  devmem2 0xe4361254 w 0x58BF58BE <fchmmr>
>> Same address, different value (for making backlight controls work
>> on the T60/intelGPU)
> 
>> On 15/05/14 22:09, The Gluglug wrote:
>>> Tested in current libreboot. should work in coreboot (using 
>>> changeset 5320 or a rebase).
> 
>>> <fchmmr> hey you! <fchmmr> I just got backlight controls
>>> working PERFECTLY <fchmmr> on an X60, running libreboot with
>>> native graphics init instead of vga oprom <fchmmr> Fn keys,
>>> that is. <fchmmr> it'll also work in coreboot (using change set
>>> 5320) <fchmmr> how i did it: <fchmmr> run coreboot on X60 with
>>> vgarom <fchmmr> do that to read from that address at each
>>> brightness level: <fchmmr> sudo  devmem2 0xe4361254 w <fchmmr>
>>> it came back with 0x879F879E every time <fchmmr> so then I
>>> tried: <fchmmr> sudo devmem2 0xe4361254 w 0x879F879E <fchmmr>
>>> writing 0x879F879E to address 0xe4361254 <fchmmr> and then I
>>> try the Fn keys for brightness controls on the X60 <fchmmr> now
>>> it works. <fchmmr> brightenss controlls work <fchmmr> this is
>>> amazing.
> 
>>> Yay!
> 
>>> So: that address should be written with that value, by
>>> coreboot, at boot time.
> 
> 
> 
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