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drm/amdgpu: Add a kernel parameter for specifying the asic type

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As more and more new asics start to reuse the old device IDs before
launch, there is a need to quickly override the existing asic type
corresponding to the reused device ID through a kernel parameter. With
this, engineers no longer need to rely on local hack patches,
facilitating cooperation across teams.

Signed-off-by: Yong Zhao <Yong.Zhao@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Yong Zhao
2019-08-30 18:09:10 -04:00
committed by Alex Deucher
parent bb42eda284
commit 4e66d7d215
4 changed files with 45 additions and 28 deletions
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7
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
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@@ -2585,7 +2585,12 @@ int amdgpu_device_init(struct amdgpu_device *adev,
adev->ddev = ddev;
adev->pdev = pdev;
adev->flags = flags;
adev->asic_type = flags & AMD_ASIC_MASK;
if (amdgpu_force_asic_type >= 0 && amdgpu_force_asic_type < CHIP_LAST)
adev->asic_type = amdgpu_force_asic_type;
else
adev->asic_type = flags & AMD_ASIC_MASK;
adev->usec_timeout = AMDGPU_MAX_USEC_TIMEOUT;
if (amdgpu_emu_mode == 1)
adev->usec_timeout *= 2;