[Mesa-dev] [PATCH 2/6] ac: compute the DCC fast clear size per slice on GFX8

[Samuel Pitoiset]

Signed-off-by: Samuel Pitoiset <samuel.pitoiset at gmail.com>
---
 src/amd/common/ac_surface.c | 25 +++++++++++++++++++++++++
 1 file changed, 25 insertions(+)

diff --git a/src/amd/common/ac_surface.c b/src/amd/common/ac_surface.c
index 9e45bd44b72..cc4aea5f8d9 100644
--- a/src/amd/common/ac_surface.c
+++ b/src/amd/common/ac_surface.c
@@ -308,6 +308,31 @@ static int gfx6_compute_level(ADDR_HANDLE addrlib,
 			 * slice is the same size) it's easy to compute.
 			 */
 			surf->dcc_slice_size = AddrDccOut->dccRamSize / config->info.array_size;
+
+			/* For arrays, we have to compute the DCC info again
+			 * with one slice size to get a correct fast clear
+			 * size.
+			 */
+			if (config->info.array_size > 1) {
+				AddrDccIn->colorSurfSize = AddrSurfInfoOut->sliceSize;
+				AddrDccIn->tileMode = AddrSurfInfoOut->tileMode;
+				AddrDccIn->tileInfo = *AddrSurfInfoOut->pTileInfo;
+				AddrDccIn->tileIndex = AddrSurfInfoOut->tileIndex;
+				AddrDccIn->macroModeIndex = AddrSurfInfoOut->macroModeIndex;
+
+				ret = AddrComputeDccInfo(addrlib,
+							 AddrDccIn, AddrDccOut);
+				if (ret == ADDR_OK) {
+					/* If the DCC memory isn't properly
+					 * aligned, the data are interleaved
+					 * accross slices.
+					 */
+					if (AddrDccOut->dccRamSizeAligned)
+						surf_level->dcc_fast_clear_size = AddrDccOut->dccFastClearSize;
+					else
+						surf_level->dcc_fast_clear_size = 0;
+				}
+			}
 		}
 	}
 
-- 
2.22.0