[PATCH 4/8] drm/amdgpu: init zfb start address and size

[Feifei Xu]

Use module parameter passed from user to initialize zfb start address
and size.

Change-Id: I3d786e863114a217f89ff7c3d4ffdabf000f31a4
Signed-off-by: Feifei Xu <Feifei.Xu at amd.com>
Signed-off-by: Hawking Zhang <Hawking.Zhang at amd.com>
Acked-by: John Bridgman <john.bridgman at amd.com>
Reviewed-by: Alex Deucher <alexander.deucher at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index 2188763..b88cb4b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -859,6 +859,16 @@ static void amdgpu_device_check_arguments(struct amdgpu_device *adev)
 		amdgpu_lockup_timeout = 10000;
 	}
 
+	if (amdgpu_zfb[0] > 0) {
+		dev_warn(adev->dev,
+			 "Zero Frame Buffer is enabled.\n");
+		adev->gmc.zfb_phys_addr = amdgpu_zfb[1] << 20;
+		adev->gmc.zfb_size = amdgpu_zfb[0] << 20;
+	} else {
+		adev->gmc.zfb_phys_addr = 0;
+		adev->gmc.zfb_size = 0;
+	}
+
 	adev->firmware.load_type = amdgpu_ucode_get_load_type(adev, amdgpu_fw_load_type);
 }
 
-- 
2.7.4