drm/amdkgd: Temporary fix for HBM width

The current computation for vram width is outdated. For permanent solution this has to be fixed. Change-Id: I1ec2895fae698def72d5047961bdf041f92f8194 Signed-off-by: Harish Kasiviswanathan <Harish.Kasiviswanathan@amd.com>
mariux64 · Apr 14, 2016 · 11fd00e · 11fd00e
1 parent 7973237
commit 11fd00e
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diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c b/drivers/gpu/drm/amd/amdgpu/gmc_v8_0.c
@@ -459,6 +459,11 @@ static int gmc_v8_0_mc_init(struct amdgpu_device *adev)
 		break;
 	}
 	adev->mc.vram_width = numchan * chansize;
+	/* FIXME: The above calculation is outdated.
+	 * For HBM provide a temporary fix */
+	if (adev->mc.vram_type == AMDGPU_VRAM_TYPE_HBM)
+		adev->mc.vram_width = AMDGPU_VRAM_TYPE_HBM_WIDTH;
+
 	/* Could aper size report 0 ? */
 	adev->mc.aper_base = pci_resource_start(adev->pdev, 0);
 	adev->mc.aper_size = pci_resource_len(adev->pdev, 0);

diff --git a/include/uapi/drm/amdgpu_drm.h b/include/uapi/drm/amdgpu_drm.h
@@ -607,6 +607,8 @@ struct drm_amdgpu_info_firmware {
 #define AMDGPU_VRAM_TYPE_HBM   6
 #define AMDGPU_VRAM_TYPE_DDR3  7
 
+#define AMDGPU_VRAM_TYPE_HBM_WIDTH 4096
+
 struct drm_amdgpu_info_device {
 	/** PCI Device ID */
 	uint32_t device_id;