6.10-stable review patch. If anyone has any objections, please let me know.
------------------
From: Victor Lu <victorchengchi.lu@xxxxxxx>
[ 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>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c | 26 ++++++++++---------
1 file changed, 14 insertions(+), 12 deletions(-)
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;
--
2.43.0
