From: Rhys Perry <pendingchaos02@gmail.com>
Date: Mon, 20 Jul 2020 15:54:22 +0000 (+0100)
Subject: radv: replace discard with demote for Quantic Dream games
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=d9072a113b2041cebfa10e6e27b5ce2687a02126;p=mesa.git

radv: replace discard with demote for Quantic Dream games

Detroit: Become Human uses dFdx/dFdy immediately after a quad-divergent
discard, which can cause the image to become white.

Signed-off-by: Rhys Perry <pendingchaos02@gmail.com>
Reviewed-by: Daniel Schürmann <daniel@schuermann.dev>
Reviewed-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Cc: <mesa-stable@lists.freedesktop.org>
Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/3212
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5991>
---

diff --git a/src/amd/vulkan/radv_device.c b/src/amd/vulkan/radv_device.c
index 53a6a3d4309..b9969e4e5eb 100644
--- a/src/amd/vulkan/radv_device.c
+++ b/src/amd/vulkan/radv_device.c
@@ -571,7 +571,8 @@ radv_handle_per_app_options(struct radv_instance *instance,
 			instance->debug_flags |= RADV_DEBUG_ZERO_VRAM;
 		} else if (!strcmp(engine_name, "Quantic Dream Engine")) {
 			/* Fix various artifacts in Detroit: Become Human */
-			instance->debug_flags |= RADV_DEBUG_ZERO_VRAM;
+			instance->debug_flags |= RADV_DEBUG_ZERO_VRAM |
+			                         RADV_DEBUG_DISCARD_TO_DEMOTE;
 		}
 	}