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drm/i915: Mark up the GTT flush following WC writes as ORIGIN_CPU 

Similarly to invalidating beforehand, if the object is mmapped via
I915_MMAP_WC we cannot track writes through the I915_GEM_DOMAIN_GTT. At
the conclusion of the write, i915_gem_object_flush_gtt_writes() we also
need to treat the origin carefully in case it may have been untracked.

See also commit aeecc9696a ("drm/i915: use ORIGIN_CPU for frontbuffer
invalidation on WC mmaps").

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
Cc: Paulo Zanoni <paulo.r.zanoni@intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20160818161718.27187-5-chris@chris-wilson.co.uk
This commit is contained in:
Chris Wilson 2016-08-18 17:16:44 +01:00
parent b19482d7ce
commit d243ad8202
1 changed files with 2 additions and 2 deletions
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4
drivers/gpu/drm/i915/i915_gem.c
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@ -1450,7 +1450,7 @@ err:
return ret;
}
static enum fb_op_origin
static inline enum fb_op_origin
write_origin(struct drm_i915_gem_object *obj, unsigned domain)
{
return domain == I915_GEM_DOMAIN_GTT && !obj->has_wc_mmap ?
@ -3155,7 +3155,7 @@ i915_gem_object_flush_gtt_write_domain(struct drm_i915_gem_object *obj)
old_write_domain = obj->base.write_domain;
obj->base.write_domain = 0;
intel_fb_obj_flush(obj, false, ORIGIN_GTT);
intel_fb_obj_flush(obj, false, write_origin(obj, I915_GEM_DOMAIN_GTT));
trace_i915_gem_object_change_domain(obj,
obj->base.read_domains,