Messages in this thread | | | Date | Wed, 14 Mar 2001 14:39:57 +0100 (CET) | From | Geert Uytterhoeven <> | Subject | Re: [Linux-fbdev-devel] [RFC] fbdev & power management |
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On Wed, 14 Mar 2001, Benjamin Herrenschmidt wrote: > >I think registering fbcon as a PM client and doing the above when the > >fbdev suspend/resume hooks are called should work. A memory backup is > >worked on until the resume is run and the backup is restored to the > >display. > > > >So the fbdev drivers would register PM with fbcon, not PCI, correct? > > Either that, or the fbdev would register with PCI (or whatever), _and_ > fbcon would too independently. In that scenario, fbcon would only handle > things like disabling the cursor timer, while fbdev's would handle HW > issues. THe only problem is for fbcon to know that a given fbdev is > asleep, this could be an exported per-fbdev flag, an error code, or > whatever. In this case, fbcon can either buffer text input, or fallback > to the cfb working on the backed up fb image (that last thing can be > handled entirely within the fbdev I guess).
I'd go for a fallback to dummycon. It's of no use to waste power on creating graphical images of the text console when asleep. And the fallback to dummycon is needed anyway while a fbdev is opened (in 2.5.x).
Gr{oetje,eeting}s,
Geert
-- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
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