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From bee6d503ecdec66ff9aabe6d97997927bdb9b7f6 Mon Sep 17 00:00:00 2001
From: Kalyan Alle <kalyan.alle@amd.com>
Date: Wed, 3 Jan 2018 13:25:20 +0530
Subject: [PATCH 0690/4131] drm/amd/amdgpu: enable GFX PG for carrizo and
disable CG for eStoney.
Enables the GFX PG for carrizo as a workaround to make the amd-17.50
kernel boot on carrizo. This patch also disables the CG on eStoney
to get rid of the filesystem corruption and IOMMU errors.
Signed-off-by: Kalyan Alle <kalyan.alle@amd.com>
---
drivers/gpu/drm/amd/amdgpu/vi.c | 9 +++++++--
1 file changed, 7 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/vi.c b/drivers/gpu/drm/amd/amdgpu/vi.c
index e131eb3..f5ec5f8 100644
--- a/drivers/gpu/drm/amd/amdgpu/vi.c
+++ b/drivers/gpu/drm/amd/amdgpu/vi.c
@@ -1066,7 +1066,11 @@ static int vi_common_early_init(void *handle)
AMD_CG_SUPPORT_GFX_CP_LS |
AMD_CG_SUPPORT_GFX_CGTS |
AMD_CG_SUPPORT_GFX_CGTS_LS |
- AMD_CG_SUPPORT_GFX_CGCG |
+ /* Enabling CGCG on 4.9 kernel results in
+ * IOMMU errors and filesystem corruption
+ * Disable CGCG until the issue is fixed properly
+ */
+ //AMD_CG_SUPPORT_GFX_CGCG |
AMD_CG_SUPPORT_GFX_CGLS |
AMD_CG_SUPPORT_BIF_LS |
AMD_CG_SUPPORT_HDP_MGCG |
@@ -1077,7 +1081,8 @@ static int vi_common_early_init(void *handle)
/* rev0 hardware requires workarounds to support PG */
adev->pg_flags = 0;
if (adev->rev_id != 0x00 || CZ_REV_BRISTOL(adev->pdev->revision)) {
- adev->pg_flags |= AMD_PG_SUPPORT_GFX_SMG |
+ adev->pg_flags |= AMD_PG_SUPPORT_GFX_PG |
+ AMD_PG_SUPPORT_GFX_SMG |
AMD_PG_SUPPORT_GFX_PIPELINE |
AMD_PG_SUPPORT_CP |
AMD_PG_SUPPORT_UVD |
--
2.7.4
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