[PATCH] drm/amdgpu: Set correct DMA mask for aldebaran

[Harish Kasiviswanathan]

Aldebaran has 48-bit physical address support

Signed-off-by: Harish Kasiviswanathan <harish.kasiviswanat...@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c 
b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
index 412e44af1608..0765c163b355 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
@@ -1675,12 +1675,17 @@ static int gmc_v9_0_sw_init(void *handle)
         */
        adev->gmc.mc_mask = 0xffffffffffffULL; /* 48 bit MC */
 
-       r = dma_set_mask_and_coherent(adev->dev, DMA_BIT_MASK(44));
+       if (adev->ip_versions[GC_HWIP][0] == IP_VERSION(9, 4, 2)) {
+               r = dma_set_mask_and_coherent(adev->dev, DMA_BIT_MASK(48));
+               adev->need_swiotlb = drm_need_swiotlb(48);
+       } else {
+               r = dma_set_mask_and_coherent(adev->dev, DMA_BIT_MASK(44));
+               adev->need_swiotlb = drm_need_swiotlb(44);
+       }
        if (r) {
                printk(KERN_WARNING "amdgpu: No suitable DMA available.\n");
                return r;
        }
-       adev->need_swiotlb = drm_need_swiotlb(44);
 
        r = gmc_v9_0_mc_init(adev);
        if (r)
-- 
2.25.1