Hi Doug,
panel->no_hpd = of_property_read_bool(dev->of_node, "no-hpd");
if (!panel->no_hpd) {
@@ -708,6 +712,8 @@ static int panel_simple_probe(struct device *dev,
const struct panel_desc *desc)
if (!panel->ddc)
return -EPROBE_DEFER;
+ } else if (aux) {
+ panel->ddc = &aux->ddc;
}
In panel_simple_probe(), the put_device(&panel->ddc->dev) call is
causing issue when the aux->ddc is used to assign panel->ddc
It works well when "ddc-i2c-bus" is used to assign panel->ddc
static int panel_simple_probe(...)
{
...
free_ddc:
if (panel->ddc)
put_device(&panel->ddc->dev);
return err;
}
== Log start ==
[ 2.393970] ------------[ cut here ]------------
[ 2.398747] kobject: '(null)' ((____ptrval____)): is not initialized,
yet kobject_put() is being called.
[ 2.408554] WARNING: CPU: 7 PID: 7 at lib/kobject.c:752
kobject_put+0x38/0xe0
...
...
[ 2.528574] Call trace:
[ 2.531092] kobject_put+0x38/0xe0
[ 2.534594] put_device+0x20/0x2c
[ 2.538002] panel_simple_probe+0x4bc/0x550
[ 2.542300] panel_simple_dp_aux_ep_probe+0x44/0x5c
[ 2.547305] dp_aux_ep_probe+0x58/0x80
== Log end ==
Sincerely,
Rajeev
