radeonsi: fix a hang with instancing in Unigine Heaven/Valley on Hawaii

This isn't documented anywhere, but it's the only thing that works
for this case.

Cc: mesa-stable@lists.freedesktop.org
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>

diff --git a/src/gallium/drivers/radeonsi/si_state_draw.c b/src/gallium/drivers/radeonsi/si_state_draw.c
index eb21ba1..4e808a3 100644 (file)
--- a/src/gallium/drivers/radeonsi/si_state_draw.c
+++ b/src/gallium/drivers/radeonsi/si_state_draw.c
@@ -411,14 +411,11 @@ static bool si_update_draw_info_state(struct si_context *sctx,
                bool ia_switch_on_eop = wd_switch_on_eop;
                unsigned primgroup_size = 64;
 
-               /* Hawaii hangs if instancing is enabled and each instance
-                * is smaller than a prim group and WD_SWITCH_ON_EOP is 0.
+               /* Hawaii hangs if instancing is enabled and WD_SWITCH_ON_EOP is 0.
                 * We don't know that for indirect drawing, so treat it as
                 * always problematic. */
                if (sctx->b.family == CHIP_HAWAII &&
-                   (info->indirect ||
-                    (info->instance_count > 1 &&
-                     u_prims_for_vertices(info->mode, info->count) < primgroup_size))) {
+                   (info->indirect || info->instance_count > 1)) {
                        wd_switch_on_eop = true;
                        ia_switch_on_eop = true;
                }