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).
- Adds documentation of this new option
An example usage in the config file would look like:
Section "OutputClass"
Identifier "AMDgpu"
MatchDriver "amdgpu"
Driver "amdgpu"
HotplugDriver "amdgpu"
EndSection
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:
- Squash the doc in the same patch
- Doc formatting changes
Cc: Alex Deucher <alexander.deucher@amd.com>
Suggested-by: Aaron Plattner aplattner@nvidia.com (v3)
Acked-by: Martin Roukala martin.roukala@mupuf.org(v1)
Acked-by: Alex Deucher alexander.deucher@amd.com (v1)
Reviewed-by: Adam Jackson ajax@redhat.com(v1)
Signed-off-by: Shashank Sharma shashank.sharma@amd.com
82bf391c93