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

[Harish Kasiviswanathan]

Aldebaran has 48-bit physical address support

Signed-off-by: Harish Kasiviswanathan <Harish.Kasiviswanathan at 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