[Mesa-dev] [PATCH 21/23] i965/gen9: Setup MCS for compressed texture surfaces

[Topi Pohjolainen]

Signed-off-by: Topi Pohjolainen <topi.pohjolainen at intel.com>
---
 src/mesa/drivers/dri/i965/gen8_surface_state.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/src/mesa/drivers/dri/i965/gen8_surface_state.c b/src/mesa/drivers/dri/i965/gen8_surface_state.c
index b140ff4..eaf5874 100644
--- a/src/mesa/drivers/dri/i965/gen8_surface_state.c
+++ b/src/mesa/drivers/dri/i965/gen8_surface_state.c
@@ -250,11 +250,12 @@ gen8_emit_texture_surface_state(struct brw_context *brw,
       pitch = mt->pitch;
    }
 
-   /* The MCS is not uploaded for single-sampled surfaces because the color
-    * buffer should always have been resolved before it is used as a texture
-    * so there is no need for it.
+   /* Prior to Gen9 MCS is not uploaded for single-sampled surfaces because
+    * the color buffer should always have been resolved before it is used as
+    * a texture so there is no need for it. On Gen9 it will be uploaded when
+    * the surface is losslessly compressed (CCS_E).
     */
-   if (mt->num_samples <= 1) {
+   if (mt->num_samples <= 1 && aux_mode != GEN9_SURFACE_AUX_MODE_CCS_E) {
       aux_mt = NULL;
       aux_mode = GEN8_SURFACE_AUX_MODE_NONE;
    }
-- 
2.5.0