From: Alex Deucher <alexdeucher@gmail.com>
To: dri-devel@lists.freedesktop.org
Cc: Alex Deucher <alexander.deucher@amd.com>
Subject: [PATCH 2/2] drm/amdgpu: enable BUS master after pci reset
Date: Tue, 7 Jun 2016 10:24:18 -0400 [thread overview]
Message-ID: <1465309458-25050-2-git-send-email-alexander.deucher@amd.com> (raw)
In-Reply-To: <1465309458-25050-1-git-send-email-alexander.deucher@amd.com>
From: Chunming Zhou <David1.Zhou@amd.com>
Re-enable bus mastering after GPU reset. We disable it
at the top of these functions, so balance them by
re-enabling it.
Signed-off-by: Chunming Zhou <David1.Zhou@amd.com>
eviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---
drivers/gpu/drm/amd/amdgpu/cik.c | 2 ++
drivers/gpu/drm/amd/amdgpu/vi.c | 5 ++++-
2 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/cik.c b/drivers/gpu/drm/amd/amdgpu/cik.c
index 924c85c..9f61cdc 100644
--- a/drivers/gpu/drm/amd/amdgpu/cik.c
+++ b/drivers/gpu/drm/amd/amdgpu/cik.c
@@ -1173,6 +1173,8 @@ static int cik_gpu_pci_config_reset(struct amdgpu_device *adev)
/* wait for asic to come out of reset */
for (i = 0; i < adev->usec_timeout; i++) {
if (RREG32(mmCONFIG_MEMSIZE) != 0xffffffff) {
+ /* enable BM */
+ pci_set_master(adev->pdev);
r = 0;
break;
}
diff --git a/drivers/gpu/drm/amd/amdgpu/vi.c b/drivers/gpu/drm/amd/amdgpu/vi.c
index dcc937e..b102d31 100644
--- a/drivers/gpu/drm/amd/amdgpu/vi.c
+++ b/drivers/gpu/drm/amd/amdgpu/vi.c
@@ -598,8 +598,11 @@ static int vi_gpu_pci_config_reset(struct amdgpu_device *adev)
/* wait for asic to come out of reset */
for (i = 0; i < adev->usec_timeout; i++) {
- if (RREG32(mmCONFIG_MEMSIZE) != 0xffffffff)
+ if (RREG32(mmCONFIG_MEMSIZE) != 0xffffffff) {
+ /* enable BM */
+ pci_set_master(adev->pdev);
return 0;
+ }
udelay(1);
}
return -EINVAL;
--
2.5.5
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prev parent reply other threads:[~2016-06-07 14:24 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-06-07 14:24 [PATCH 1/2] drm/amdgpu: add return value for pci config reset Alex Deucher
2016-06-07 14:24 ` Alex Deucher [this message]
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