Revert "intel: Always allocate miptrees from level 0, not tObj->BaseLevel."

This reverts commit 7ce6517f3ac41bf770ab39aba4509d4f535ef663.
This reverts commit d60145d06d999c5c76000499e6fa9351e11d17fa.

I was wrong about which generations supported baselevel adjustment --
it's just gen4, nothing earlier.  This meant that i915 would have
never used the mag filter when baselevel != 0.  Not a severe bug, but
not an intentional regression.  I think we can fix the performance
issue another way.

1 files changed, 8 insertions, 3 deletions

diff --git a/src/mesa/drivers/dri/i965/brw_wm_sampler_state.c b/src/mesa/drivers/dri/i965/brw_wm_sampler_state.c
index f830e25626..30672b4251 100644
--- a/src/mesa/drivers/dri/i965/brw_wm_sampler_state.c
+++ b/src/mesa/drivers/dri/i965/brw_wm_sampler_state.c
@@ -115,7 +115,6 @@ struct wm_sampler_key {
    struct wm_sampler_entry {
       GLenum tex_target;
       GLenum wrap_r, wrap_s, wrap_t;
-      uint32_t base_level;
       float maxlod, minlod;
       float lod_bias;
       float max_aniso;
@@ -244,7 +243,14 @@ static void brw_update_sampler_state(struct brw_context *brw,
    sampler->ss0.lod_preclamp = 1; /* OpenGL mode */
    sampler->ss0.default_color_mode = 0; /* OpenGL/DX10 mode */
 
-   sampler->ss0.base_level = U_FIXED(key->base_level, 1);
+   /* Set BaseMipLevel, MaxLOD, MinLOD: 
+    *
+    * XXX: I don't think that using firstLevel, lastLevel works,
+    * because we always setup the surface state as if firstLevel ==
+    * level zero.  Probably have to subtract firstLevel from each of
+    * these:
+    */
+   sampler->ss0.base_level = U_FIXED(0, 1);
 
    sampler->ss1.max_lod = U_FIXED(CLAMP(key->maxlod, 0, 13), 6);
    sampler->ss1.min_lod = U_FIXED(CLAMP(key->minlod, 0, 13), 6);
@@ -286,7 +292,6 @@ brw_wm_sampler_populate_key(struct brw_context *brw,
 	 entry->wrap_s = texObj->WrapS;
 	 entry->wrap_t = texObj->WrapT;
 
-	 entry->base_level = texObj->BaseLevel;
 	 entry->maxlod = texObj->MaxLod;
 	 entry->minlod = texObj->MinLod;
 	 entry->lod_bias = texUnit->LodBias + texObj->LodBias;