This is a note to let you know that I've just added the patch titled
drm/amdgpu: Fix rejecting Tahiti GPUs
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-amdgpu-fix-rejecting-tahiti-gpus.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit c995df2c71b06e788627a83d76c565a56142bf76
Author: Lukas Fink <lukas.fink1@xxxxxxxxx>
Date: Fri Jan 14 07:51:41 2022 +0100
drm/amdgpu: Fix rejecting Tahiti GPUs
[ Upstream commit 3993a799fc971bc9b918bd969aa55864447b5dde ]
eb4fd29afd4a ("drm/amdgpu: bind to any 0x1002 PCI diplay class device") added
generic bindings to amdgpu so that that it binds to all display class devices
with VID 0x1002 and then rejects those in amdgpu_pci_probe.
Unfortunately it reuses a driver_data value of 0 to detect those new bindings,
which is already used to denote CHIP_TAHITI ASICs.
The driver_data value given to those new bindings was changed in
dd0761fd24ea1 ("drm/amdgpu: set CHIP_IP_DISCOVERY as the asic type by default")
to CHIP_IP_DISCOVERY (=36), but it seems that the check in amdgpu_pci_probe
was forgotten to be changed. Therefore, it still rejects Tahiti GPUs.
Link: https://gitlab.freedesktop.org/drm/amd/-/issues/1860
Fixes: eb4fd29afd4a ("drm/amdgpu: bind to any 0x1002 PCI diplay class device")
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Lukas Fink <lukas.fink1@xxxxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index c294081022bd..cb0b5972e7fd 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -2009,7 +2009,7 @@ static int amdgpu_pci_probe(struct pci_dev *pdev,
return -ENODEV;
}
- if (flags == 0) {
+ if (flags == CHIP_IP_DISCOVERY) {
DRM_INFO("Unsupported asic. Remove me when IP discovery init is in place.\n");
return -ENODEV;
}
