drm/xe/i2c: Allow per domain unique id

PCI bus, device and function can be same for devices existing across
different domains. Allow per domain unique identifier while registering
platform device to prevent name conflict.

Fixes: f0e53aadd702 ("drm/xe: Support for I2C attached MCUs")
Signed-off-by: Raag Jadav <raag.jadav@intel.com>
Reviewed-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://patch.msgid.link/20260721113438.651100-1-raag.jadav@intel.com
Signed-off-by: Matt Roper <matthew.d.roper@intel.com>
(cherry picked from commit a79f6abc8b516b5bd906e2eca8121e3549ee163f)
Signed-off-by: Thomas Hellström <thomas.hellstrom@linux.intel.com>

diff --git a/drivers/gpu/drm/xe/xe_i2c.c b/drivers/gpu/drm/xe/xe_i2c.c
index 706783863d07d66b4685005d6649b3cd143ecc3b..f05f23221c1b7b9a41dd4790d82e3994457b6ecf 100644 (file)
--- a/drivers/gpu/drm/xe/xe_i2c.c
+++ b/drivers/gpu/drm/xe/xe_i2c.c
@@ -95,18 +95,21 @@ static int xe_i2c_register_adapter(struct xe_i2c *i2c)
        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);
+
        /*
         * Not using platform_device_register_full() here because we don't have
         * a handle to the platform_device before it returns. xe_i2c_notifier()
         * uses that handle, but it may be called before
         * platform_device_register_full() is done.
         */
-       pdev = platform_device_alloc(adapter_name, pci_dev_id(pci));
+       pdev = platform_device_alloc(adapter_name, id);
        if (!pdev) {
                ret = -ENOMEM;
                goto err_fwnode_remove;