Commit b6b2b278 authored by Jason Ekstrand's avatar Jason Ekstrand
Browse files

blorp: Emit a dummy 3DSTATE_WM prior to 3DSTATE_WM_HZ_OP



Cc: mesa-stable@lists.freedesktop.org
Suggested-by: default avatarFrancisco Jerez <currojerez@riseup.net>
Reviewed-by: default avatarKenneth Graunke <kenneth@whitecape.org>
parent 2318ca68
......@@ -1642,6 +1642,15 @@ blorp_emit_gen8_hiz_op(struct blorp_batch *batch,
blorp_emit_cc_viewport(batch);
}
/* According to the SKL PRM formula for WM_INT::ThreadDispatchEnable, the
* 3DSTATE_WM::ForceThreadDispatchEnable field can force WM thread dispatch
* even when WM_HZ_OP is active. However, WM thread dispatch is normally
* disabled for HiZ ops and it appears that force-enabling it can lead to
* GPU hangs on at least Skylake. Since we don't know the current state of
* the 3DSTATE_WM packet, just emit a dummy one prior to 3DSTATE_WM_HZ_OP.
*/
blorp_emit(batch, GENX(3DSTATE_WM), wm);
/* If we can't alter the depth stencil config and multiple layers are
* involved, the HiZ op will fail. This is because the op requires that a
* new config is emitted for each additional layer.
......
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