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drm/amdgpu/psp: invalidate the hdp read cache before reading the psp response

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Otherwise we may get stale data.

Reviewed-by: Feifei Xu <Feifei.Xu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2019-09-17 15:17:41 -05:00
parent e8186eeccb
commit 01b40c98ed
1 changed files with 2 additions and 0 deletions
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2
drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
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@ -151,10 +151,12 @@ psp_cmd_submit_buf(struct psp_context *psp,
return ret;
}
amdgpu_asic_invalidate_hdp(psp->adev, NULL);
while (*((unsigned int *)psp->fence_buf) != index) {
if (--timeout == 0)
break;
msleep(1);
amdgpu_asic_invalidate_hdp(psp->adev, NULL);
}
/* In some cases, psp response status is not 0 even there is no