[Intel-gfx] [RFC] drm/i915: support zero flicker boot
jbarnes at virtuousgeek.org
Thu Oct 22 10:29:35 CEST 2009
On Thu, 22 Oct 2009 16:45:49 +0900
"H. Peter Anvin" <hpa at zytor.com> wrote:
> On 10/22/2009 03:42 PM, Jesse Barnes wrote:
> > If the BIOS programs the native panel mode at boot and the boot
> > loader leaves it alone, we should be able to boot with zero
> > flicker. This patch fixes up the "mode_switch" test in
> > drm_crtc_helper's set_config function and adds code to the i915
> > display init function to set the current CRTC mode and enable
> > flag. If the eventual mode programmed matches the current mode, we
> > should have no need to turn the display off and then on again.
> > Any thoughts? Peter you may already have a similar bit of code for
> > the testing you've been doing?
> > Jesse
> I haven't, no, but when I get back to the U.S. I will test it with
> the native-video-mode bootloader I have.
> Unfortunately I don't have that machine with me.
Arg, and I need to set crtc->enabled = true in the init function, not
just false if the pipe is off.
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