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intel/isl: Support lossless compression with multisamples

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GEN12 adds the ability to losslessly compress each sample plane in a
multisampled buffer that uses MCS compression.

v2: Remove unnecessary assertion (Nanley Chery)

Signed-off-by: Sagar Ghuge <sagar.ghuge@intel.com>
Reviewed-by: Nanley Chery <nanley.g.chery@intel.com>
This commit is contained in:
Sagar Ghuge 2019-09-18 12:37:59 -07:00
parent 758a6a3a00
commit 366fcbf2d8
1 changed files with 1 additions and 5 deletions
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6
src/intel/isl/isl.c
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@ -1848,13 +1848,9 @@ isl_surf_get_ccs_surf(const struct isl_device *dev,
if (aux_surf->usage & ISL_SURF_USAGE_CCS_BIT)
return false;
/* Only multisampled depth buffers with HiZ can have CCS. */
if (surf->samples > 1 && !(aux_surf->usage & ISL_SURF_USAGE_HIZ_BIT))
if (ISL_DEV_GEN(dev) < 12 && surf->samples > 1)
return false;
assert(surf->msaa_layout == ISL_MSAA_LAYOUT_NONE ||
surf->msaa_layout == ISL_MSAA_LAYOUT_INTERLEAVED);
/* CCS support does not exist prior to Gen7 */
if (ISL_DEV_GEN(dev) <= 6)
return false;