From 01b40c98ede4f536a8e30ba30c9510ad7a0fe7ca Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Tue, 17 Sep 2019 15:17:41 -0500
Subject: drm/amdgpu/psp: invalidate the hdp read cache before reading the psp
response
Git-commit: 01b40c98ede4f536a8e30ba30c9510ad7a0fe7ca
Patch-mainline: v5.5-rc1
References: bsc#1152489
Otherwise we may get stale data.
Reviewed-by: Feifei Xu <Feifei.Xu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Thomas Zimmermann <tzimmermann@suse.de>
---
drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c | 2 ++
1 file changed, 2 insertions(+)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
index 17af26ee5a7f..af726bc6980d 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_psp.c
@@ -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
--
2.28.0