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drm/amdgpu: fix eGPU hotplug regression

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The driver needs to wait for the on board firmware
to finish its initialization before probing the card.
Commit 959056982a ("drm/amdgpu: Fix discovery initialization failure during pci rescan")
switched from using msleep() to using usleep_range() which
seems to have caused init failures on some navi1x boards. Switch
back to msleep().

Fixes: 959056982a ("drm/amdgpu: Fix discovery initialization failure during pci rescan")
Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3559
Closes: https://gitlab.freedesktop.org/drm/amd/-/issues/3500
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: Ma Jun <Jun.Ma2@amd.com>
This commit is contained in:
Alex Deucher 2024-08-19 11:14:29 -04:00
parent e389eefe34
commit c69b07f7bb
1 changed files with 1 additions and 1 deletions
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2
drivers/gpu/drm/amd/amdgpu/amdgpu_discovery.c
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@ -278,7 +278,7 @@ static int amdgpu_discovery_read_binary_from_mem(struct amdgpu_device *adev,
msg = RREG32(mmMP0_SMN_C2PMSG_33);
if (msg & 0x80000000)
break;
usleep_range(1000, 1100);
msleep(1);
}
}