From: Harry Wentland <harry.wentland@amd.com>
Date: Mon, 30 Oct 2017 13:41:51 -0400
Subject: drm/amd/display: Enable VM support only on APUs newer than CZ
Git-commit: 6e227308a91db544c6f91edcf37c56764db2ae47
Patch-mainline: v4.17-rc1
References: FATE#326289 FATE#326079 FATE#326049 FATE#322398 FATE#326166
VM support is only available for CZ and newer APUs. Trying to
enable it for dGPU will blow up in DC.
v2: Don't enable gpu_vm_support for Raven yet since it leads to
a black screen. Need to debug this further before enabling.
Change-Id: Ibe467c36affe2e7a7ee740c8d4f73027ca807178
Signed-off-by: Harry Wentland <harry.wentland@amd.com>
Suggested-by: Alex Deucher <alexander.deucher@amd.com>
CC: Christian Koenig <christian.koenig@amd.com>
Reviewed-by: Andrey Grodzovsky <andrey.grodzovsky@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Petr Tesarik <ptesarik@suse.com>
---
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 8 ++++++++
1 file changed, 8 insertions(+)
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -451,6 +451,14 @@ static int amdgpu_dm_init(struct amdgpu_
else
init_data.log_mask = DC_MIN_LOG_MASK;
+ /*
+ * TODO debug why this doesn't work on Raven
+ */
+ if (adev->flags & AMD_IS_APU &&
+ adev->asic_type >= CHIP_CARRIZO &&
+ adev->asic_type < CHIP_RAVEN)
+ init_data.flags.gpu_vm_support = true;
+
/* Display Core create. */
adev->dm.dc = dc_create(&init_data);