From f2d6657111ed5c065b1f934b548a279205c3d370 Mon Sep 17 00:00:00 2001
From: Le Ma <le.ma@amd.com>
Date: Tue, 11 Sep 2018 13:11:28 +0800
Subject: drm/amdgpu: skip pasid mapping for second mmhub on Arcturus
Git-commit: f2d6657111ed5c065b1f934b548a279205c3d370
Patch-mainline: v5.4-rc1
References: bsc#1152489
There's no LUT register for second mmhub to convert pasid since it has no ATC.
Signed-off-by: Le Ma <le.ma@amd.com>
Reviewed-by: Feifei Xu <Feifei.Xu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
---
drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
index 75801178efa1..a05040249a50 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
@@ -492,6 +492,10 @@ static void gmc_v9_0_emit_pasid_mapping(struct amdgpu_ring *ring, unsigned vmid,
struct amdgpu_device *adev = ring->adev;
uint32_t reg;
+ /* Do nothing because there's no lut register for mmhub1. */
+ if (ring->funcs->vmhub == AMDGPU_MMHUB_1)
+ return;
+
if (ring->funcs->vmhub == AMDGPU_GFXHUB_0)
reg = SOC15_REG_OFFSET(OSSSYS, 0, mmIH_VMID_0_LUT) + vmid;
else
--
2.28.0