[AMD Public Use]

+               if (adev->ras_features & (1 << AMDGPU_RAS_BLOCK__UMC)) {
                        if (adev->df.funcs->enable_ecc_force_par_wr_rmw)
                                
adev->df.funcs->enable_ecc_force_par_wr_rmw(adev, false);

Hmm... this is still not correct. If the UMC ECC is enabled, we don't need to 
apply the workaround.

Regards,
Hawking
-----Original Message-----
From: Chen, Guchun <[email protected]> 
Sent: Tuesday, September 29, 2020 14:53
To: [email protected]; Deucher, Alexander 
<[email protected]>; Zhang, Hawking <[email protected]>; Li, Dennis 
<[email protected]>; Zhou1, Tao <[email protected]>; Clements, John 
<[email protected]>
Cc: Chen, Guchun <[email protected]>
Subject: [PATCH] drm/amdgpu: drop duplicated ecc check for vega10 (v3)

The same ECC check has been executed in amdgpu_ras_init for vega10, prior to 
gmc_v9_0_late_init.

v2: drop all atombios helper callings
v3: use bit operation

Signed-off-by: Guchun Chen <[email protected]>
---
 drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c | 16 ++++------------
 1 file changed, 4 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c 
b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
index 3dddbc60fe3d..9599946e4bee 100644
--- a/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
+++ b/drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c
@@ -1193,21 +1193,13 @@ static int gmc_v9_0_late_init(void *handle)
        r = amdgpu_gmc_allocate_vm_inv_eng(adev);
        if (r)
                return r;
-       /* Check if ecc is available */
+
+       /* apply DF parity workaround */
        if (!amdgpu_sriov_vf(adev) && (adev->asic_type == CHIP_VEGA10)) {
-               r = amdgpu_atomfirmware_mem_ecc_supported(adev);
-               if (!r) {
-                       DRM_INFO("ECC is not present.\n");
+               if (adev->ras_features & (1 << AMDGPU_RAS_BLOCK__UMC)) {
                        if (adev->df.funcs->enable_ecc_force_par_wr_rmw)
                                
adev->df.funcs->enable_ecc_force_par_wr_rmw(adev, false);
-               } else
-                       DRM_INFO("ECC is active.\n");
-
-               r = amdgpu_atomfirmware_sram_ecc_supported(adev);
-               if (!r)
-                       DRM_INFO("SRAM ECC is not present.\n");
-               else
-                       DRM_INFO("SRAM ECC is active.\n");
+               }
        }
 
        if (adev->mmhub.funcs && adev->mmhub.funcs->reset_ras_error_count)
--
2.17.1
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