[PATCH] drm/panthor: Add defer probe for firmware load

[Andy Yan]

From: Andy Yan <andy....@rock-chips.com>

The firmware in the rootfs will not be accessible until we
are in the SYSTEM_RUNNING state, so return EPROBE_DEFER until
that point.
This let the driver can load firmware when it is builtin.

Signed-off-by: Andy Yan <andy....@rock-chips.com>
---

 drivers/gpu/drm/panthor/panthor_fw.c | 11 ++++++++++-
 1 file changed, 10 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/panthor/panthor_fw.c 
b/drivers/gpu/drm/panthor/panthor_fw.c
index 33c87a59834e..25e375f8333c 100644
--- a/drivers/gpu/drm/panthor/panthor_fw.c
+++ b/drivers/gpu/drm/panthor/panthor_fw.c
@@ -1336,8 +1336,17 @@ int panthor_fw_init(struct panthor_device *ptdev)
        }
 
        ret = panthor_fw_load(ptdev);
-       if (ret)
+       if (ret) {
+               /*
+                * The firmware in the rootfs will not be accessible until we
+                * are in the SYSTEM_RUNNING state, so return EPROBE_DEFER until
+                * that point.
+                */
+               if (system_state < SYSTEM_RUNNING)
+                       ret = -EPROBE_DEFER;
+
                goto err_unplug_fw;
+       }
 
        ret = panthor_vm_active(fw->vm);
        if (ret)
-- 
2.34.1