From: Eric Anholt <eric@anholt.net>
Date: Tue, 10 Nov 2009 21:57:29 +0000 (-0800)
Subject: i965: Add a note explaining the data cache domain.
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=eb6a1f8a00596156cd7164838ef9e9a5b39e7254;p=mesa.git

i965: Add a note explaining the data cache domain.
---

diff --git a/src/mesa/drivers/dri/i965/brw_wm_surface_state.c b/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
index 0bf735c0f2c..e2f0a383e75 100644
--- a/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_surface_state.c
@@ -358,7 +358,10 @@ brw_create_constant_surface( struct brw_context *brw,
 			 NULL, NULL);
 
    if (key->bo) {
-      /* Emit relocation to surface contents */
+      /* Emit relocation to surface contents.  Section 5.1.1 of the gen4
+       * bspec ("Data Cache") says that the data cache does not exist as
+       * a separate cache and is just the sampler cache.
+       */
       dri_bo_emit_reloc(bo,
 			I915_GEM_DOMAIN_SAMPLER, 0,
 			0,