On a side note, because we see a clear behaviour difference when applying the PCI patch we can assume the driver catch the `rdev->flags & RADEON_IS_PCI` test instead of the `rdev->flags & RADEON_IS_AGP` one when running an AGP GPU with AGP disabled in kernel at build time.
On a side note, because we see a clear behaviour difference when applying the PCI patch we can assume the driver catch the `rdev->flags & RADEON_IS_PCI` test instead of the `rdev->flags & RADEON_IS_AGP` one when running an AGP GPU with AGP disabled in kernel at build time.