2x MSAA also uses 8 bits, just like 4x.  More bits are unused.

Signed-off-by: Kenneth Graunke <kenn...@whitecape.org>
Reviewed-by: Jordan Justen <jordan.l.jus...@intel.com>
---
 src/mesa/drivers/dri/i965/intel_mipmap_tree.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c 
b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
index 58e09b7..e4d67b9 100644
--- a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
+++ b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
@@ -1251,6 +1251,7 @@ intel_miptree_alloc_mcs(struct brw_context *brw,
     */
    mesa_format format;
    switch (num_samples) {
+   case 2:
    case 4:
       /* 8 bits/pixel are required for MCS data when using 4x MSAA (2 bits for
        * each sample).
-- 
2.0.0

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