From ef06f1bb03c84754438621a4cce9d4cc063007f7 Mon Sep 17 00:00:00 2001
From: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Date: Mon, 28 Dec 2020 08:44:03 +0100
Subject: [PATCH] radv: disable stippledBresenhamLines on GFX9

Some CTS fail on Vega10 but work on Raven.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8242>
---
 src/amd/vulkan/radv_device.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/amd/vulkan/radv_device.c b/src/amd/vulkan/radv_device.c
index 55626da2636..94262b32256 100644
--- a/src/amd/vulkan/radv_device.c
+++ b/src/amd/vulkan/radv_device.c
@@ -1365,7 +1365,10 @@ void radv_GetPhysicalDeviceFeatures2(
 			features->bresenhamLines = true;
 			features->smoothLines = false;
 			features->stippledRectangularLines = false;
-			features->stippledBresenhamLines = true;
+			/* FIXME: Some stippled Bresenham CTS fails on Vega10
+			 * but work on Raven.
+			 */
+			features->stippledBresenhamLines = pdevice->rad_info.chip_class != GFX9;
 			features->stippledSmoothLines = false;
 			break;
 		}