* [PATCH] drm/xe/i2c: use device_create_managed_software_node()
@ 2026-09-22 14:25 Bartosz Golaszewski
2026-09-26 1:00 ` Rodrigo Vivi
0 siblings, 1 reply; 2+ messages in thread
From: Bartosz Golaszewski @ 2026-09-22 14:25 UTC (permalink / raw)
To: Matthew Brost, Thomas Hellström, Rodrigo Vivi, David Airlie,
Simona Vetter, brgl
Cc: intel-xe, dri-devel, linux-kernel, Heikki Krogerus, Bartosz Golaszewski
This driver intentionally uses the fine-grained approach to creating
platform devices. It assigns a software node as the primary firmware
node of the device it creates. Ahead of improving the reference counting
of platform device software nodes, switch to using
device_create_managed_software_node(). This way, we create a dynamic
software node whose life-time is tied to the device to which it's
assigned.
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Acked-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
---
This patch exists in mainline as commit fc90ce2d ("drm/xe/i2c: use
device_create_managed_software_node()") but the code got silently
overwritten by merge commit cc467969646b ("Merge drm/drm-next into
drm-xe-next"). It should be reapplied.
---
drivers/gpu/drm/xe/xe_i2c.c | 22 ++++++++--------------
drivers/gpu/drm/xe/xe_i2c.h | 1 -
2 files changed, 8 insertions(+), 15 deletions(-)
diff --git a/drivers/gpu/drm/xe/xe_i2c.c b/drivers/gpu/drm/xe/xe_i2c.c
index 51ca9fb73b708317c5dd8613d0ba060b8dc2028e..f4f3819882897f7f19a7bd3043a936e3c7eec553 100644
--- a/drivers/gpu/drm/xe/xe_i2c.c
+++ b/drivers/gpu/drm/xe/xe_i2c.c
@@ -111,14 +111,9 @@ static int xe_i2c_register_adapter(struct xe_i2c *i2c)
{
struct pci_dev *pci = to_pci_dev(i2c->drm_dev);
struct platform_device *pdev;
- struct fwnode_handle *fwnode;
int ret;
u32 id;
- fwnode = fwnode_create_software_node(xe_i2c_adapter_properties, NULL);
- if (IS_ERR(fwnode))
- return PTR_ERR(fwnode);
-
id = (pci_domain_nr(pci->bus) << 16) | pci_dev_id(pci);
/*
@@ -128,14 +123,16 @@ static int xe_i2c_register_adapter(struct xe_i2c *i2c)
* platform_device_register_full() is done.
*/
pdev = platform_device_alloc(adapter_name, id);
- if (!pdev) {
- ret = -ENOMEM;
- goto err_fwnode_remove;
- }
+ if (!pdev)
+ return -ENOMEM;
+
+ ret = device_create_managed_software_node(&pdev->dev,
+ xe_i2c_adapter_properties,
+ NULL);
+ if (ret)
+ goto err_pdev_put;
pdev->dev.parent = i2c->drm_dev;
- pdev->dev.fwnode = fwnode;
- i2c->adapter_node = fwnode;
i2c->pdev = pdev;
ret = platform_device_add(pdev);
@@ -146,8 +143,6 @@ static int xe_i2c_register_adapter(struct xe_i2c *i2c)
err_pdev_put:
platform_device_put(pdev);
-err_fwnode_remove:
- fwnode_remove_software_node(fwnode);
return ret;
}
@@ -155,7 +150,6 @@ static int xe_i2c_register_adapter(struct xe_i2c *i2c)
static void xe_i2c_unregister_adapter(struct xe_i2c *i2c)
{
platform_device_unregister(i2c->pdev);
- fwnode_remove_software_node(i2c->adapter_node);
}
/**
diff --git a/drivers/gpu/drm/xe/xe_i2c.h b/drivers/gpu/drm/xe/xe_i2c.h
index d63adacfefe71b3ae695987f104f978959a7e2c5..5969054a6b6b3f184857defd4ad3f6489f05aca0 100644
--- a/drivers/gpu/drm/xe/xe_i2c.h
+++ b/drivers/gpu/drm/xe/xe_i2c.h
@@ -33,7 +33,6 @@ struct xe_i2c_endpoint {
};
struct xe_i2c {
- struct fwnode_handle *adapter_node;
struct platform_device *pdev;
struct i2c_adapter *adapter;
struct i2c_client *client[XE_I2C_MAX_CLIENTS];
---
base-commit: 5c4d4169604b335c38bbc79bc1fc03042981fc6f
change-id: 20260922-xe-i2c-reapply-swnode-unreg-8e18b542549f
Best regards,
--
Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PATCH] drm/xe/i2c: use device_create_managed_software_node()
2026-09-22 14:25 [PATCH] drm/xe/i2c: use device_create_managed_software_node() Bartosz Golaszewski
@ 2026-09-26 1:00 ` Rodrigo Vivi
0 siblings, 0 replies; 2+ messages in thread
From: Rodrigo Vivi @ 2026-09-26 1:00 UTC (permalink / raw)
To: Bartosz Golaszewski
Cc: Matthew Brost, Thomas Hellström, David Airlie,
Simona Vetter, brgl, intel-xe, dri-devel, linux-kernel,
Heikki Krogerus
On Tue, Sep 22, 2026 at 04:25:55PM +0200, Bartosz Golaszewski wrote:
> This driver intentionally uses the fine-grained approach to creating
> platform devices. It assigns a software node as the primary firmware
> node of the device it creates. Ahead of improving the reference counting
> of platform device software nodes, switch to using
> device_create_managed_software_node(). This way, we create a dynamic
> software node whose life-time is tied to the device to which it's
> assigned.
>
> Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
> Acked-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
> Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
> ---
> This patch exists in mainline as commit fc90ce2d ("drm/xe/i2c: use
> device_create_managed_software_node()") but the code got silently
> overwritten by merge commit cc467969646b ("Merge drm/drm-next into
> drm-xe-next"). It should be reapplied.
I pushed this back again, but modifying the commit message to reflect the
history.
> ---
> drivers/gpu/drm/xe/xe_i2c.c | 22 ++++++++--------------
> drivers/gpu/drm/xe/xe_i2c.h | 1 -
> 2 files changed, 8 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/gpu/drm/xe/xe_i2c.c b/drivers/gpu/drm/xe/xe_i2c.c
> index 51ca9fb73b708317c5dd8613d0ba060b8dc2028e..f4f3819882897f7f19a7bd3043a936e3c7eec553 100644
> --- a/drivers/gpu/drm/xe/xe_i2c.c
> +++ b/drivers/gpu/drm/xe/xe_i2c.c
> @@ -111,14 +111,9 @@ static int xe_i2c_register_adapter(struct xe_i2c *i2c)
> {
> struct pci_dev *pci = to_pci_dev(i2c->drm_dev);
> struct platform_device *pdev;
> - struct fwnode_handle *fwnode;
> int ret;
> u32 id;
>
> - fwnode = fwnode_create_software_node(xe_i2c_adapter_properties, NULL);
> - if (IS_ERR(fwnode))
> - return PTR_ERR(fwnode);
> -
> id = (pci_domain_nr(pci->bus) << 16) | pci_dev_id(pci);
>
> /*
> @@ -128,14 +123,16 @@ static int xe_i2c_register_adapter(struct xe_i2c *i2c)
> * platform_device_register_full() is done.
> */
> pdev = platform_device_alloc(adapter_name, id);
> - if (!pdev) {
> - ret = -ENOMEM;
> - goto err_fwnode_remove;
> - }
> + if (!pdev)
> + return -ENOMEM;
> +
> + ret = device_create_managed_software_node(&pdev->dev,
> + xe_i2c_adapter_properties,
> + NULL);
> + if (ret)
> + goto err_pdev_put;
>
> pdev->dev.parent = i2c->drm_dev;
> - pdev->dev.fwnode = fwnode;
> - i2c->adapter_node = fwnode;
> i2c->pdev = pdev;
>
> ret = platform_device_add(pdev);
> @@ -146,8 +143,6 @@ static int xe_i2c_register_adapter(struct xe_i2c *i2c)
>
> err_pdev_put:
> platform_device_put(pdev);
> -err_fwnode_remove:
> - fwnode_remove_software_node(fwnode);
>
> return ret;
> }
> @@ -155,7 +150,6 @@ static int xe_i2c_register_adapter(struct xe_i2c *i2c)
> static void xe_i2c_unregister_adapter(struct xe_i2c *i2c)
> {
> platform_device_unregister(i2c->pdev);
> - fwnode_remove_software_node(i2c->adapter_node);
> }
>
> /**
> diff --git a/drivers/gpu/drm/xe/xe_i2c.h b/drivers/gpu/drm/xe/xe_i2c.h
> index d63adacfefe71b3ae695987f104f978959a7e2c5..5969054a6b6b3f184857defd4ad3f6489f05aca0 100644
> --- a/drivers/gpu/drm/xe/xe_i2c.h
> +++ b/drivers/gpu/drm/xe/xe_i2c.h
> @@ -33,7 +33,6 @@ struct xe_i2c_endpoint {
> };
>
> struct xe_i2c {
> - struct fwnode_handle *adapter_node;
> struct platform_device *pdev;
> struct i2c_adapter *adapter;
> struct i2c_client *client[XE_I2C_MAX_CLIENTS];
>
> ---
> base-commit: 5c4d4169604b335c38bbc79bc1fc03042981fc6f
> change-id: 20260922-xe-i2c-reapply-swnode-unreg-8e18b542549f
>
> Best regards,
> --
> Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
>
^ permalink raw reply [flat|nested] 2+ messages in thread
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2026-09-22 14:25 [PATCH] drm/xe/i2c: use device_create_managed_software_node() Bartosz Golaszewski
2026-09-26 1:00 ` Rodrigo Vivi
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