From 05b09d654933d266c67d04b849b9d94376932ced Mon Sep 17 00:00:00 2001
From: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Date: Tue, 4 Aug 2020 11:17:25 +0200
Subject: [PATCH] radv: fix sample shading on GFX 10.3

Based on RadeonSI.

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/6168>
---
 src/amd/vulkan/si_cmd_buffer.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/amd/vulkan/si_cmd_buffer.c b/src/amd/vulkan/si_cmd_buffer.c
index 766d73fc08a..1015730507a 100644
--- a/src/amd/vulkan/si_cmd_buffer.c
+++ b/src/amd/vulkan/si_cmd_buffer.c
@@ -420,6 +420,7 @@ si_emit_graphics(struct radv_device *device,
 
 		if (physical_device->rad_info.chip_class >= GFX10_3) {
 			radeon_set_context_reg(cs, R_028750_SX_PS_DOWNCONVERT_CONTROL_GFX103, 0xff);
+			radeon_set_context_reg(cs, 0x28848, 1 << 9); /* This fixes sample shading. */
 		}
 
 		if (physical_device->rad_info.chip_class == GFX10) {
-- 
2.30.2