diff options
Diffstat (limited to 'src/intel')
| -rw-r--r-- | src/intel/isl/isl_surface_state.c | 15 |
1 files changed, 14 insertions, 1 deletions
diff --git a/src/intel/isl/isl_surface_state.c b/src/intel/isl/isl_surface_state.c index cd7a0845c78..f22bf361fb6 100644 --- a/src/intel/isl/isl_surface_state.c +++ b/src/intel/isl/isl_surface_state.c @@ -173,7 +173,20 @@ get_qpitch(const struct isl_surf *surf) unreachable("Bad isl_surf_dim"); case ISL_DIM_LAYOUT_GEN4_2D: if (GEN_GEN >= 9) { - return isl_surf_get_array_pitch_el_rows(surf); + if (surf->dim == ISL_SURF_DIM_3D && surf->tiling == ISL_TILING_W) { + /* This is rather annoying and completely undocumented. It + * appears that the hardware has a bug (or undocumented feature) + * regarding stencil buffers most likely related to the way + * W-tiling is handled as modified Y-tiling. If you bind a 3-D + * stencil buffer normally, and use texelFetch on it, the z or + * array index will get implicitly multiplied by 2 for no obvious + * reason. The fix appears to be to divide qpitch by 2 for + * W-tiled surfaces. + */ + return isl_surf_get_array_pitch_el_rows(surf) / 2; + } else { + return isl_surf_get_array_pitch_el_rows(surf); + } } else { /* From the Broadwell PRM for RENDER_SURFACE_STATE.QPitch * |