GEN2: Initialization of VSP1 failed at upstream v4.8-rc2

[Hiep Cao Minh <cm-hiep@jinso.co.jp>]

Hi Laurent,

As you know the information about Initialization of VSP1 failed at 
upstream v4.8-rc2
  from the report of "The failure summary report of GEN2 for Linux 
v4.8-rc2".
"[    5.237049] vsp1: probe of fe920000.vsp1 failed with error -38
[    5.254664] vsp1: probe of fe928000.vsp1 failed with error -38
[    5.272277] vsp1: probe of fe930000.vsp1 failed with error -38
[    5.289891] vsp1: probe of fe938000.vsp1 failed with error -38"

I have found the patch that causing of this issue:
"94fcdf8 [media] v4l: vsp1: Add FCP support"

In this patch,

"@@ -528,7 +533,7 @@ static int vsp1_pm_runtime_resume(struct device *dev)
                         return ret;
         }

-       return 0;
+       return rcar_fcp_enable(vsp1->fcp);
  }"

vsp1_pm_runtime_resume() function should be returned "0" if it success.
I tried to debug this place, and I realize that the rcar_fcp_enable() 
function returned "-38" during Initialization.
That's why the error message occurs.
We know that the rcar_fcp_enable() function also returns 0 on success or 
a negative error code if an error occurs.
So, I am thinking of something just before it happens.

Please have a look at this issue when you have time.

Best regards,
Hiep.