On Tue, Aug 11, 2015 at 07:47:10PM +0300, ville.syrjala@xxxxxxxxxxxxxxx wrote: > From: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> > > Currently we don't clflush on pin_to_display if the bo is already > UC/WT and is not in the CPU write domain. This causes problems with > pwrite since pwrite doesn't change the write domain, and it avoids > clflushing on UC/WT buffers on LLC platforms unless the buffer is > currently being scanned out. > > Fix the problem by marking the cache dirty and adjusting > i915_gem_object_set_cache_level() to clflush when the cache is dirty > even if the cache_level doesn't change. > > My last attempt [1] at fixing this via write domain frobbing was shot > down, but now with the cache_dirty flag we can do things in a nicer way. > > [1] http://lists.freedesktop.org/archives/intel-gfx/2014-November/055390.html > > v2: Drop the I915_CACHE_NONE/WT checks from pwrite > > Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=86422 > Testcase: igt/kms_pwrite_crc > Testcase: igt/gem_pwrite_snooped > Signed-off-by: Ville Syrjälä <ville.syrjala@xxxxxxxxxxxxxxx> Reviewed-by: Chris Wilson <chris@xxxxxxxxxxxxxxxxxx> -Chris -- Chris Wilson, Intel Open Source Technology Centre _______________________________________________ Intel-gfx mailing list Intel-gfx@xxxxxxxxxxxxxxxxxxxxx http://lists.freedesktop.org/mailman/listinfo/intel-gfx
