From: Ben Widawsky <benjamin.widaw...@intel.com>

The PDPs seem to get screwed up otherwise, specifically PDP0. I am not
really clear why this is required, it just works with full PPGTT.

v2: Only do it for gen8, to limit regression potential

v3: Fix the bugzilla links

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=78891
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=78935
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=78936
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=78937
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=78938

Signed-off-by: Ben Widawsky <b...@bwidawsk.net>
Signed-off-by: Rodrigo Vivi <rodrigo.v...@intel.com>
---
 drivers/gpu/drm/i915/i915_gem_context.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_gem_context.c 
b/drivers/gpu/drm/i915/i915_gem_context.c
index 3b99390..56f7b1e 100644
--- a/drivers/gpu/drm/i915/i915_gem_context.c
+++ b/drivers/gpu/drm/i915/i915_gem_context.c
@@ -586,6 +586,9 @@ mi_set_context(struct intel_engine_cs *ring,
        else
                intel_ring_emit(ring, MI_NOOP);
 
+       if (INTEL_INFO(ring->dev)->gen == 8)
+               hw_flags |= MI_FORCE_RESTORE;
+
        intel_ring_emit(ring, MI_NOOP);
        intel_ring_emit(ring, MI_SET_CONTEXT);
        intel_ring_emit(ring, 
i915_gem_obj_ggtt_offset(new_context->legacy_hw_ctx.rcs_state) |
-- 
1.9.3

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