Mesa (master): radv: enable DCC for MSAA on GFX10+

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Module: Mesa
Branch: master
Commit: 3c1275ccae620888108206799403999c1fc7e8b3
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=3c1275ccae620888108206799403999c1fc7e8b3

Author: Samuel Pitoiset <samuel.pitoiset at gmail.com>
Date:   Tue Jan  5 16:47:17 2021 +0100

radv: enable DCC for MSAA on GFX10+

It should work fine now.

This gives +1-2% improvements with Control MSAA (2x and 4x)
on Sienna.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset at gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas at basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8413>

---

 src/amd/vulkan/radv_image.c | 10 ++++------
 1 file changed, 4 insertions(+), 6 deletions(-)

diff --git a/src/amd/vulkan/radv_image.c b/src/amd/vulkan/radv_image.c
index 1573b3edc2e..90409792089 100644
--- a/src/amd/vulkan/radv_image.c
+++ b/src/amd/vulkan/radv_image.c
@@ -193,12 +193,10 @@ radv_use_dcc_for_image(struct radv_device *device,
 	if (pCreateInfo->arrayLayers > 1 && pCreateInfo->mipLevels > 1)
 		return false;
 
-	/* FIXME: DCC for MSAA with 4x and 8x samples doesn't work yet, while
-	 * 2x can be enabled with an option.
-	 */
-	if (pCreateInfo->samples > 2 ||
-	    (pCreateInfo->samples == 2 &&
-	     !device->physical_device->dcc_msaa_allowed))
+	/* TODO: Fix and enable DCC MSAA on older chips. */
+	if (pCreateInfo->samples > 1 &&
+	    !device->physical_device->dcc_msaa_allowed &&
+	     device->physical_device->rad_info.chip_class < GFX10)
 		return false;
 
 	/* Determine if the formats are DCC compatible. */