[PATCH] drm/amdgpu: Add msix restore for pass-through mode

[Deucher, Alexander]

[Public]

Acked-by: Alex Deucher <alexander.deucher at amd.com>
________________________________
From: Chengzhe Liu <ChengZhe.Liu at amd.com>
Sent: Thursday, July 22, 2021 1:49 AM
To: amd-gfx at lists.freedesktop.org <amd-gfx at lists.freedesktop.org>
Cc: Tuikov, Luben <Luben.Tuikov at amd.com>; Koenig, Christian <Christian.Koenig at amd.com>; Deucher, Alexander <Alexander.Deucher at amd.com>; Xiao, Jack <Jack.Xiao at amd.com>; Zhang, Hawking <Hawking.Zhang at amd.com>; Xu, Feifei <Feifei.Xu at amd.com>; Wang, Kevin(Yang) <Kevin1.Wang at amd.com>; Liu, Cheng Zhe <ChengZhe.Liu at amd.com>
Subject: [PATCH] drm/amdgpu: Add msix restore for pass-through mode

In pass-through mode, after mode 1 reset, msix enablement status would
lost and never receives interrupt again. So, we should restore msix
status after mode 1 reset.

Signed-off-by: Chengzhe Liu <ChengZhe.Liu at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
index 83af307e97cd..e1aa4a5e6a98 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_irq.c
@@ -584,7 +584,7 @@ void amdgpu_irq_gpu_reset_resume_helper(struct amdgpu_device *adev)
 {
         int i, j, k;

-       if (amdgpu_sriov_vf(adev))
+       if (amdgpu_sriov_vf(adev) || amdgpu_passthrough(adev))
                 amdgpu_restore_msix(adev);

         for (i = 0; i < AMDGPU_IRQ_CLIENTID_MAX; ++i) {
--
2.25.1

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