On Fri, 09 Oct 2015, Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> wrote: > On Thu, Oct 08, 2015 at 01:50:21PM -0700, Wayne Boyer wrote: >> From: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> >> >> A long time ago (before 3.14) we relied on a permanent pinning of the >> ifbdev to lock the fb in place inside the GGTT. However, the >> introduction of stealing the BIOS framebuffer and reusing its address in >> the GGTT for the fbdev has muddied waters and we use an inherited fb. >> However, the inherited fb is only pinned whilst it is active and we no >> longer have an explicit pin for the info->system_base mmapping used by >> the fbdev. The result is that after some aperture pressure the fbdev may >> be evicted, but we continue to write the fbcon into the same GGTT >> address - overwriting anything else that may be put into that offset. >> The effect is most pronounced across suspend/resume as >> intel_fbdev_set_suspend() does a full clear over the whole scanout. >> >> v2: rebased on latest nightly (Wayne) >> v3: changed i915_gem_object_ggtt_pin() to i915_gem_obj_ggtt_pin() based >> on Chris' review. (Wayne) > > Note that this patch also depends on the > > drm/i915: Set the map-and-fenceable flag for preallocated objects > > fix as well > http://patchwork.freedesktop.org/patch/58026/ Jesse, please provide your Tested-by on that plus this patch, since you reported the breakage [1] that got the two patches reverted in the first place. Thanks, Jani. [1] http://mid.gmane.org/55DF3886.1060001@xxxxxxxxxxxxxxxx > -Chris > > -- > Chris Wilson, Intel Open Source Technology Centre > _______________________________________________ > Intel-gfx mailing list > Intel-gfx@xxxxxxxxxxxxxxxxxxxxx > http://lists.freedesktop.org/mailman/listinfo/intel-gfx -- Jani Nikula, Intel Open Source Technology Center -- To unsubscribe from this list: send the line "unsubscribe stable" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html