Skip to content

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

Shashank Sharma requested to merge contactshashanksharma/xserver-fork-shashank:v2 into master

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:

  • Adds a few functions and fine-tunes the GPU hotplug infrastructure to allow the DDX driver to be loaded, if it is configured in the X config file options as "hotplug-driver".
  • 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).

V2: Fixed typo in commit message (Martin) Added R-B from Adam. Added ACK from Alex and Martin.

V3: Added an output class based approach for finding the DDX driver (Aaron) Rebase

V4: Addressed review comment from Aaron: GPU hot-plug handling driver's name to be read from the DDX config file options. In this way only the DDX drivers interested in handling GPU hot-plug will be picked and loaded, for others modesetting driver will be used as usual.

V5: Addressed review comments from Aaron:

  • X config option to be listed in CamelCase.
  • Indentation fix at one place.
  • Code readability related optimization.

V6: Addressed review comments from Aaron:

  • Document formatting
  • Squash 2 patches in a single one
Edited by Shashank Sharma

Merge request reports