From: Neil Roberts <neil@linux.intel.com>
Date: Wed, 9 Sep 2015 13:38:08 +0000 (+0100)
Subject: i965: Support allocating the MCS buffer for 16x MSAA
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=bf6bd7eaf09fadc516a1e46635ed8590f4d88535;p=mesa.git

i965: Support allocating the MCS buffer for 16x MSAA

When 16 samples are used the MCS buffer needs 64 bits per pixel.

Reviewed-by: Ben Widawsky <ben@bwidawsk.net>
---

diff --git a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
index 0802b92502c..b1a7632d82f 100644
--- a/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
+++ b/src/mesa/drivers/dri/i965/intel_mipmap_tree.c
@@ -1427,6 +1427,12 @@ intel_miptree_alloc_mcs(struct brw_context *brw,
        */
       format = MESA_FORMAT_R_UINT32;
       break;
+   case 16:
+      /* 64 bits/pixel are required for MCS data when using 16x MSAA (4 bits
+       * for each sample).
+       */
+      format = MESA_FORMAT_RG_UINT32;
+      break;
    default:
       unreachable("Unrecognized sample count in intel_miptree_alloc_mcs");
    };