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xf86: allow DDX driver for GPU/PCI hot-plug

The current X server infrastructure sets modesetting driver as default driver to handle PCI-hotplug of a GPU device. This prevents the respective DDX driver (like AMDGPU DDX driver) to take control of the card.

This patch:

  • fine-tunes the PCI-hotplug infrastructure to allow the respective DDX driver to be loaded.
  • scans and updates the PCI device list before adding the new GPU device in platform, so that the association of the platform device and PCI device is in place (dev->pdev).

Cc: Alex Deucher

Reviewed-by: Adam Jackson Acked-by: Alex Deucher Acked-by: Martin Roukala Signed-off-by: Shashank Sharma

Edited by Shashank Sharma

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