Em qua, 2019-04-24 às 20:58 +0100, Chris Wilson escreveu: > Quoting Jian-Hong Pan (2019-04-23 10:28:10) > > From: Daniel Drake <drake@xxxxxxxxxxxx> > > > > On many (all?) the Gemini Lake systems we work with, there is frequent > > momentary graphical corruption at the top of the screen, and it seems > > that disabling framebuffer compression can avoid this. > > > > The ticket was reported 6 months ago and has already affected a > > multitude of users, without any real progress being made. So, lets > > disable framebuffer compression on GeminiLake until a solution is found. > > > > Buglink: https://bugs.freedesktop.org/show_bug.cgi?id=108085 > > Signed-off-by: Daniel Drake <drake@xxxxxxxxxxxx> > > Signed-off-by: Jian-Hong Pan <jian-hong@xxxxxxxxxxxx> > > Fixes: fd7d6c5c8f3e ("drm/i915: enable FBC on gen9+ too") ? > Cc: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx> > Cc: Daniel Vetter <daniel.vetter@xxxxxxxx> > Cc: Jani Nikula <jani.nikula@xxxxxxxxxxxxxxx> > Cc: <stable@xxxxxxxxxxxxxxx> # v4.11+ > > glk landed 1 month before, so that seems the earliest broken point. > The bug is well reported, the bug author is helpful and it even has a description of "steps to reproduce" that looks very easy (although I didn't try it). Everything suggests this is a bug the display team could actually solve with not-so-many hours of debugging. In the meantime, unbreak the systems: Reviewed-by: Paulo Zanoni <paulo.r.zanoni@xxxxxxxxx> > > --- > > drivers/gpu/drm/i915/intel_fbc.c | 4 ++++ > > 1 file changed, 4 insertions(+) > > > > diff --git a/drivers/gpu/drm/i915/intel_fbc.c b/drivers/gpu/drm/i915/intel_fbc.c > > index 656e684e7c9a..fc018f3f53a1 100644 > > --- a/drivers/gpu/drm/i915/intel_fbc.c > > +++ b/drivers/gpu/drm/i915/intel_fbc.c > > @@ -1278,6 +1278,10 @@ static int intel_sanitize_fbc_option(struct drm_i915_private *dev_priv) > > if (!HAS_FBC(dev_priv)) > > return 0; > > > > + /* https://bugs.freedesktop.org/show_bug.cgi?id=108085 */ > > + if (IS_GEMINILAKE(dev_priv)) > > + return 0; > > + > > if (IS_BROADWELL(dev_priv) || INTEL_GEN(dev_priv) >= 9) > > return 1; > > > > -- > > 2.21.0 > > _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel
