lkml.org 
[lkml]   [2009]   [Oct]   [12]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
Date
From
SubjectRe: 2.6.32 regression (bisected): Video tearing/glitching with T400 laptops
On Mon, 12 Oct 2009 20:46:51 +0200
"Carlos R. Mafra" <crmafra2@gmail.com> wrote:

> On Mon 12.Oct'09 at 9:54:38 -0700, Jesse Barnes wrote:
> > >
> > > Nope, unfortunately, it's not helping on my T400 laptop. I'm
> > > still getting huge amounts of glitching and tearing with this
> > > patch applied against -rc3.
> > >
> > > What I'm using for now to fix up my system is this patch.
> > >
> >
> > How about this one? I have one more idea to try out if this doesn't
> > work (hacking on it now).
>
> I was also experiencing something very similar to Theodore's bug
> report and, at least for me, the patch below fixed the issue (the
> previous one also had no effect).

Cool, good to hear. Hopefully Ted and Keith will confirm too.

--
Jesse Barnes, Intel Open Source Technology Center

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 7a5fb79..1451945 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -1047,7 +1047,7 @@ static void g4x_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
dev_priv->cfb_fence = obj_priv->fence_reg;
dev_priv->cfb_plane = intel_crtc->plane;

- dpfc_ctl = plane | DPFC_SR_EN | DPFC_CTL_LIMIT_1X;
+ dpfc_ctl = plane | DPFC_CTL_LIMIT_1X;
if (obj_priv->tiling_mode != I915_TILING_NONE) {
dpfc_ctl |= DPFC_CTL_FENCE_EN | dev_priv->cfb_fence;
I915_WRITE(DPFC_CHICKEN, DPFC_HT_MODIFY);

\
 
 \ /
  Last update: 2009-10-12 21:13    [from the cache]
©2003-2011 Jasper Spaans