[Mesa-dev] [PATCH 2/2] anv/cmd_buffer: Remove the 1-D case from the HiZ QPitch calculation

[Jason Ekstrand]

The 1-D special case doesn't actually apply to depth or HiZ.  I discovered
this while converting BLORP over to genxml and ISL.  The reason is that the
1-D special case only applies to the new Sky Lake 1-D layout which is only
used for LINEAR 1-D images.  For tiled 1-D images, such as depth buffers,
the old gen4 2-D layout is used and the QPitch should be in rows.

Cc: Nanley Chery <nanley.g.chery at intel.com>
Cc: "13.0" <mesa-stable at lists.freedesktop.org>
---
 src/intel/vulkan/genX_cmd_buffer.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/intel/vulkan/genX_cmd_buffer.c b/src/intel/vulkan/genX_cmd_buffer.c
index c953b93..cf21a31 100644
--- a/src/intel/vulkan/genX_cmd_buffer.c
+++ b/src/intel/vulkan/genX_cmd_buffer.c
@@ -2177,11 +2177,14 @@ cmd_buffer_emit_depth_stencil(struct anv_cmd_buffer *cmd_buffer)
           *    - SURFTYPE_1D: distance in pixels between array slices
           *    - SURFTYPE_2D/CUBE: distance in rows between array slices
           *    - SURFTYPE_3D: distance in rows between R - slices
+          *
+          * Unfortunately, the docs aren't 100% accurate here.  They fail to
+          * mention that the 1-D rule only applies to linear 1-D images.
+          * Since depth and HiZ buffers are always tiled, they are treated as
+          * 2-D images.  Prior to Sky Lake, this field is always in rows.
           */
          hdb.SurfaceQPitch =
-            image->aux_surface.isl.dim == ISL_SURF_DIM_1D ?
-               isl_surf_get_array_pitch_el(&image->aux_surface.isl) >> 2 :
-               isl_surf_get_array_pitch_el_rows(&image->aux_surface.isl) >> 2;
+            isl_surf_get_array_pitch_el_rows(&image->aux_surface.isl) >> 2;
 #endif
       }
    } else {
-- 
2.5.0.400.gff86faf