This is a note to let you know that I've just added the patch titled
drm/amdgpu: Do not wait for MP0_C2PMSG_33 IFWI init in SRIOV
to the 6.10-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-do-not-wait-for-mp0_c2pmsg_33-ifwi-init-i.patch
and it can be found in the queue-6.10 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit d63b924d950659ec84e21fbc25c8ab3f985a3a7f
Author: Victor Lu <victorchengchi.lu@xxxxxxx>
Date: Fri May 31 14:59:22 2024 -0400
drm/amdgpu: Do not wait for MP0_C2PMSG_33 IFWI init in SRIOV
[ Upstream commit b32563859d6f61265222ec0f27d394964a8f7669 ]
SRIOV does not need to wait for IFWI init, and MP0_C2PMSG_33 is blocked
for VF access.
Signed-off-by: Victor Lu <victorchengchi.lu@xxxxxxx>
Reviewed-by: Vignesh Chander <Vignesh.Chander@xxxxxxx>
Signed-off-by: Alex Deucher <alexander.deucher@xxxxxxx>
Stable-dep-of: 9cead81eff63 ("drm/amdgpu: fix eGPU hotplug regression")
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c
index 0e31bdb4b7cb6..ea5223388cff2 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c
@@ -256,19 +256,21 @@ static int amdgpu_discovery_read_binary_from_mem(struct amdgpu_device *adev,
u32 msg;
int i, ret = 0;
- /* It can take up to a second for IFWI init to complete on some dGPUs,
- * but generally it should be in the 60-100ms range. Normally this starts
- * as soon as the device gets power so by the time the OS loads this has long
- * completed. However, when a card is hotplugged via e.g., USB4, we need to
- * wait for this to complete. Once the C2PMSG is updated, we can
- * continue.
- */
+ if (!amdgpu_sriov_vf(adev)) {
+ /* It can take up to a second for IFWI init to complete on some dGPUs,
+ * but generally it should be in the 60-100ms range. Normally this starts
+ * as soon as the device gets power so by the time the OS loads this has long
+ * completed. However, when a card is hotplugged via e.g., USB4, we need to
+ * wait for this to complete. Once the C2PMSG is updated, we can
+ * continue.
+ */
- for (i = 0; i < 1000; i++) {
- msg = RREG32(mmMP0_SMN_C2PMSG_33);
- if (msg & 0x80000000)
- break;
- usleep_range(1000, 1100);
+ for (i = 0; i < 1000; i++) {
+ msg = RREG32(mmMP0_SMN_C2PMSG_33);
+ if (msg & 0x80000000)
+ break;
+ usleep_range(1000, 1100);
+ }
}
vram_size = (uint64_t)RREG32(mmRCC_CONFIG_MEMSIZE) << 20;
