diff mbox series

[1/3] drm: display: Set fwnode for aux bus devices

Message ID 20241024061347.1771063-2-saravanak@google.com (mailing list archive)
State New
Headers show
Series A few minor fw_devlink fixes | expand

Commit Message

Saravana Kannan Oct. 24, 2024, 6:13 a.m. UTC
fwnode needs to be set for a device for fw_devlink to be able to
track/enforce its dependencies correctly. Without this, you'll see error
messages like this when the supplier has probed and tries to make sure
all its fwnode consumers are linked to it using device links:

mediatek-drm-dp 1c500000.edp-tx: Failed to create device link (0x180) with backlight-lcd0

Reported-by: "Nícolas F. R. A. Prado" <nfraprado@collabora.com>
Closes: https://lore.kernel.org/all/7b995947-4540-4b17-872e-e107adca4598@notapiano/
Tested-by: "Nícolas F. R. A. Prado" <nfraprado@collabora.com>
Signed-off-by: Saravana Kannan <saravanak@google.com>
---
 drivers/gpu/drm/display/drm_dp_aux_bus.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

Comments

Thierry Reding Oct. 24, 2024, 5:27 p.m. UTC | #1
On Wed, Oct 23, 2024 at 11:13:42PM -0700, Saravana Kannan wrote:
> fwnode needs to be set for a device for fw_devlink to be able to
> track/enforce its dependencies correctly. Without this, you'll see error
> messages like this when the supplier has probed and tries to make sure
> all its fwnode consumers are linked to it using device links:
> 
> mediatek-drm-dp 1c500000.edp-tx: Failed to create device link (0x180) with backlight-lcd0
> 
> Reported-by: "Nícolas F. R. A. Prado" <nfraprado@collabora.com>
> Closes: https://lore.kernel.org/all/7b995947-4540-4b17-872e-e107adca4598@notapiano/
> Tested-by: "Nícolas F. R. A. Prado" <nfraprado@collabora.com>
> Signed-off-by: Saravana Kannan <saravanak@google.com>
> ---
>  drivers/gpu/drm/display/drm_dp_aux_bus.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)

Reviewed-by: Thierry Reding <treding@nvidia.com>
Dmitry Baryshkov Oct. 25, 2024, 12:22 a.m. UTC | #2
On Wed, Oct 23, 2024 at 11:13:42PM -0700, Saravana Kannan wrote:
> fwnode needs to be set for a device for fw_devlink to be able to
> track/enforce its dependencies correctly. Without this, you'll see error
> messages like this when the supplier has probed and tries to make sure
> all its fwnode consumers are linked to it using device links:
> 
> mediatek-drm-dp 1c500000.edp-tx: Failed to create device link (0x180) with backlight-lcd0
> 
> Reported-by: "Nícolas F. R. A. Prado" <nfraprado@collabora.com>
> Closes: https://lore.kernel.org/all/7b995947-4540-4b17-872e-e107adca4598@notapiano/
> Tested-by: "Nícolas F. R. A. Prado" <nfraprado@collabora.com>
> Signed-off-by: Saravana Kannan <saravanak@google.com>
> ---
>  drivers/gpu/drm/display/drm_dp_aux_bus.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
diff mbox series

Patch

diff --git a/drivers/gpu/drm/display/drm_dp_aux_bus.c b/drivers/gpu/drm/display/drm_dp_aux_bus.c
index d810529ebfb6..ec7eac6b595f 100644
--- a/drivers/gpu/drm/display/drm_dp_aux_bus.c
+++ b/drivers/gpu/drm/display/drm_dp_aux_bus.c
@@ -292,7 +292,7 @@  int of_dp_aux_populate_bus(struct drm_dp_aux *aux,
 	aux_ep->dev.parent = aux->dev;
 	aux_ep->dev.bus = &dp_aux_bus_type;
 	aux_ep->dev.type = &dp_aux_device_type_type;
-	aux_ep->dev.of_node = of_node_get(np);
+	device_set_node(&aux_ep->dev, of_fwnode_handle(of_node_get(np)));
 	dev_set_name(&aux_ep->dev, "aux-%s", dev_name(aux->dev));
 
 	ret = device_register(&aux_ep->dev);