Re: [PATCH] drm/bridge: tc358767: fix probe without attached output node

[Andrey Gusakov <andrey.gusakov@xxxxxxxxxxxxxxxxxx>]

Hi,

On Mon, Jul 10, 2017 at 3:41 PM, Lucas Stach <l.stach@xxxxxxxxxxxxxx> wrote:

The output node of the TC358767 is only used if another bridge is chained
behind it. Panels attached to the TC358767 can be detected using the usual
DP AUX probing. This restores the old behavior of ignoring the output if
no endpoint is found.

Fixes: ebc944613567 (drm: convert drivers to use drm_of_find_panel_or_bridge)
CC: stable@xxxxxxxxxxxxxxx
Signed-off-by: Lucas Stach <l.stach@xxxxxxxxxxxxxx>

Acked-by: Andrey Gusakov <andrey.gusakov@xxxxxxxxxxxxxxxxxx>

---
 drivers/gpu/drm/bridge/tc358767.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/bridge/tc358767.c b/drivers/gpu/drm/bridge/tc358767.c
index 5c26488e7a2d..0529e500c534 100644
--- a/drivers/gpu/drm/bridge/tc358767.c
+++ b/drivers/gpu/drm/bridge/tc358767.c
@@ -1255,7 +1255,7 @@ static int tc_probe(struct i2c_client *client, const struct i2c_device_id *id)

        /* port@2 is the output port */
        ret = drm_of_find_panel_or_bridge(dev->of_node, 2, 0, &tc->panel, NULL);
-       if (ret)
+       if (ret && ret != -ENODEV)
                return ret;

        /* Shut down GPIO is optional */
--
2.11.0

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