When CONFIG_NVMEM is disabled, reading the optional "shader-present"
nvmem cell can return -EOPNOTSUPP.

Treat this the same as the cell being absent so panthor can continue
probing on platforms that do not provide shader-present fuses through
nvmem.

Signed-off-by: Karunika Choo <[email protected]>
---
 drivers/gpu/drm/panthor/panthor_hw.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/panthor/panthor_hw.c 
b/drivers/gpu/drm/panthor/panthor_hw.c
index 7e315708ca7c..4c96573b649a 100644
--- a/drivers/gpu/drm/panthor/panthor_hw.c
+++ b/drivers/gpu/drm/panthor/panthor_hw.c
@@ -182,7 +182,7 @@ static int overload_shader_present(struct panthor_device 
*ptdev)
                                              &contents);
        if (!ret)
                ptdev->gpu_info.shader_present = contents;
-       else if (ret == -ENOENT)
+       else if (ret == -ENOENT || ret == -EOPNOTSUPP)
                return 0;
        else
                return dev_err_probe(ptdev->base.dev, ret,
-- 
2.43.0

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