[PATCH 03/18] drm/etnaviv: only check if the cmdbuf is inside the linear window on MMUv1

[Lucas Stach]

There is no linear window on MMUv2 and the FE can access the full 4GB
address space either directly (as long as the MMU isn't configured) or
through the MMU, once it is up.

Signed-off-by: Lucas Stach <l.stach at pengutronix.de>
---
 drivers/gpu/drm/etnaviv/etnaviv_gpu.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c 
b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
index 433d2df0907b..2306962330a0 100644
--- a/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
+++ b/drivers/gpu/drm/etnaviv/etnaviv_gpu.c
@@ -678,7 +678,9 @@ int etnaviv_gpu_init(struct etnaviv_gpu *gpu)
                dev_err(gpu->dev, "could not create command buffer\n");
                goto destroy_iommu;
        }
-       if (gpu->buffer->paddr - gpu->memory_base > 0x80000000) {
+
+       if (!(gpu->identity.minor_features1 & chipMinorFeatures1_MMU_VERSION) &&
+           gpu->buffer->paddr - gpu->memory_base > 0x80000000) {
                ret = -EINVAL;
                dev_err(gpu->dev,
                        "command buffer outside valid memory window\n");
-- 
2.8.1