This doesn't do anything except auto-init drm_agp support when you call drm_get_pci_dev(). Which amdgpu stopped doing with
commit b58c11314a1706bf094c489ef5cb28f76478c704 Author: Alex Deucher alexander.deucher@amd.com Date: Fri Jun 2 17:16:31 2017 -0400
drm/amdgpu: drop deprecated drm_get_pci_dev and drm_put_dev
No idea whether this was intentional or accidental breakage, but I guess anyone who manages to boot a this modern gpu behind an agp bridge deserves a price. A price I never expect anyone to ever collect :-)
Cc: Alex Deucher alexander.deucher@amd.com Cc: "Christian König" christian.koenig@amd.com Cc: Hawking Zhang Hawking.Zhang@amd.com Cc: Xiaojie Yuan xiaojie.yuan@amd.com Cc: Evan Quan evan.quan@amd.com Cc: "Tianci.Yin" tianci.yin@amd.com Cc: "Marek Olšák" marek.olsak@amd.com Cc: Hans de Goede hdegoede@redhat.com Signed-off-by: Daniel Vetter daniel.vetter@intel.com --- drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c index 4598836c5fa4..6cea92017109 100644 --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c @@ -1379,7 +1379,7 @@ int amdgpu_file_to_fpriv(struct file *filp, struct amdgpu_fpriv **fpriv)
static struct drm_driver kms_driver = { .driver_features = - DRIVER_USE_AGP | DRIVER_ATOMIC | + DRIVER_ATOMIC | DRIVER_GEM | DRIVER_RENDER | DRIVER_MODESET | DRIVER_SYNCOBJ | DRIVER_SYNCOBJ_TIMELINE,