Re: [coreboot] Intel GMA: Backlight brightness driver

[Patrick Rudolph]

On 2018-07-29 06:39 PM, Alexander Couzens wrote:
> Hi Patrick,
>
> thanks for your work.
> Are there any documentation or description what Mailbox 3 support is?
> Where it come from?

It's documented here:
https://01.org/sites/default/files/documentation/skl_opregion_rev0p5.pdf
> Best,
> lynxis

Intel GMA: Backlight brightness driver

<OFF TOPIC>
(Sorry for hijacking the discussion..)
I just peeked inside the pdf and tumbled upon the following statement (page4):
"The latest reasoning for replacement of SMI is driven by a future OS requirement that 
restricts the use of SMI as a means to communicate with the system firmware."
Can someone enlighten me what this "future OS requirement" means?..
Thanks in advance,
  Florentin

----- Mail d'origine -----
De: Patrick Rudolph 
À: Alexander Couzens 
Cc: [e-mail]
Envoyé: Sun, 29 Jul 2018 18:51:21 +0200 (CEST)
Objet: Re: [coreboot] Intel GMA: Backlight brightness driver

On 2018-07-29 06:39 PM, Alexander Couzens wrote:
> Hi Patrick,
>
> thanks for your work.
> Are there any documentation or description what Mailbox 3 support is?
> Where it come from?

It's documented here:
https://01.org/sites/default/files/documentation/skl_opregion_rev0p5.pdf
> Best,
> lynxis