diff options
Diffstat (limited to 'src/intel/isl/isl.c')
| -rw-r--r-- | src/intel/isl/isl.c | 30 |
1 files changed, 23 insertions, 7 deletions
diff --git a/src/intel/isl/isl.c b/src/intel/isl/isl.c index 8cfec47733c..e7e5530e5bf 100644 --- a/src/intel/isl/isl.c +++ b/src/intel/isl/isl.c @@ -1740,9 +1740,30 @@ isl_surf_get_ccs_surf(const struct isl_device *dev, if (surf->usage & ISL_SURF_USAGE_DISABLE_AUX_BIT) return false; + /* The PRM doesn't say this explicitly, but fast-clears don't appear to + * work for 3D textures until gen9 where the layout of 3D textures changes + * to match 2D array textures. + */ if (ISL_DEV_GEN(dev) <= 8 && surf->dim != ISL_SURF_DIM_2D) return false; + /* From the HSW PRM Volume 7: 3D-Media-GPGPU, page 652 (Color Clear of + * Non-MultiSampler Render Target Restrictions): + * + * "Support is for non-mip-mapped and non-array surface types only." + * + * This restriction is lifted on gen8+. Technically, it may be possible to + * create a CCS for an arrayed or mipmapped image and only enable CCS_D + * when rendering to the base slice. However, there is no documentation + * tell us what the hardware would do in that case or what it does if you + * walk off the bases slice. (Does it ignore CCS or does it start + * scribbling over random memory?) We play it safe and just follow the + * docs and don't allow CCS_D for arrayed or mip-mapped surfaces. + */ + if (ISL_DEV_GEN(dev) <= 7 && + (surf->levels > 1 || surf->logical_level0_px.array_len > 1)) + return false; + if (isl_format_is_compressed(surf->format)) return false; @@ -1780,19 +1801,14 @@ isl_surf_get_ccs_surf(const struct isl_device *dev, return false; } - /* Multi-LOD and multi-layer CCS isn't supported on gen7. */ - const uint8_t levels = ISL_DEV_GEN(dev) <= 7 ? 1 : surf->levels; - const uint32_t array_len = ISL_DEV_GEN(dev) <= 7 ? - 1 : surf->logical_level0_px.array_len; - return isl_surf_init(dev, ccs_surf, .dim = surf->dim, .format = ccs_format, .width = surf->logical_level0_px.width, .height = surf->logical_level0_px.height, .depth = surf->logical_level0_px.depth, - .levels = levels, - .array_len = array_len, + .levels = surf->levels, + .array_len = surf->logical_level0_px.array_len, .samples = 1, .row_pitch = row_pitch, .usage = ISL_SURF_USAGE_CCS_BIT, |