[PATCH 083/102] drm/amdgpu: assign fb_start/end in mmhub v9.4 interface

[Alex Deucher]

From: Le Ma <le.ma at amd.com>

Align with mmhub v1.0.

Signed-off-by: Le Ma <le.ma at amd.com>
Reviewed-by: Feifei Xu <Feifei.Xu at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/mmhub_v9_4.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/mmhub_v9_4.c b/drivers/gpu/drm/amd/amdgpu/mmhub_v9_4.c
index c0eb8f0a2182..33b0de54a5da 100644
--- a/drivers/gpu/drm/amd/amdgpu/mmhub_v9_4.c
+++ b/drivers/gpu/drm/amd/amdgpu/mmhub_v9_4.c
@@ -39,10 +39,17 @@ u64 mmhub_v9_4_get_fb_location(struct amdgpu_device *adev)
 {
 	/* The base should be same b/t 2 mmhubs on Acrturus. Read one here. */
 	u64 base = RREG32_SOC15(MMHUB, 0, mmVMSHAREDVC0_MC_VM_FB_LOCATION_BASE);
+	u64 top = RREG32_SOC15(MMHUB, 0, mmVMSHAREDVC0_MC_VM_FB_LOCATION_TOP);
 
 	base &= VMSHAREDVC0_MC_VM_FB_LOCATION_BASE__FB_BASE_MASK;
 	base <<= 24;
 
+	top &= VMSHAREDVC0_MC_VM_FB_LOCATION_TOP__FB_TOP_MASK;
+	top <<= 24;
+
+	adev->gmc.fb_start = base;
+	adev->gmc.fb_end = top;
+
 	return base;
 }
 
-- 
2.20.1