This makes mc programming much simpler in future patches.
Since evergreen, the vbios has been programming the fb location
to the proper vram size. The only reason to reprogram it would
be to change the location.
Reviewed-by: Christian König <christian.koenig at amd.com>
Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
---
drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c | 5 ++++-
1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c
index 4b38d06..bd94c3d 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v7_0.c
@@ -242,13 +242,16 @@ static int gmc_v7_0_mc_load_microcode(struct amdgpu_device *adev)
static void gmc_v7_0_vram_gtt_location(struct amdgpu_device *adev,
struct amdgpu_mc *mc)
{
+ u64 base = RREG32(mmMC_VM_FB_LOCATION) & 0xFFFF;
+ base <<= 24;
+
if (mc->mc_vram_size > 0xFFC0000000ULL) {
/* leave room for at least 1024M GTT */
dev_warn(adev->dev, "limiting VRAM\n");
mc->real_vram_size = 0xFFC0000000ULL;
mc->mc_vram_size = 0xFFC0000000ULL;
}
- amdgpu_vram_location(adev, &adev->mc, 0);
+ amdgpu_vram_location(adev, &adev->mc, base);
adev->mc.gtt_base_align = 0;
amdgpu_gtt_location(adev, mc);
}
--
2.5.5
