From: Yifan Zha <Yifan.Zha@amd.com>
Date: Fri, 19 Aug 2022 03:02:19 +0000 (+0800)
Subject: drm/admgpu: Skip CG/PG on SOC21 under SRIOV VF
X-Git-Tag: v5.19.17~109
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=3f2cfb29dceb5a76cdf9d79fbf2b376f953d33bd;p=thirdparty%2Fkernel%2Fstable.git

drm/admgpu: Skip CG/PG on SOC21 under SRIOV VF

[ Upstream commit 828418259254863e0af5805bd712284e2bd88e3b ]

[Why]
There is no CG(Clock Gating)/PG(Power Gating) requirement on SRIOV VF.
For multi VF, VF should not enable any CG/PG features.
For one VF, PF will program CG/PG related registers.

[How]
Do not set any cg/pg flag bit at early init under sriov.

Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Yifan Zha <Yifan.Zha@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---

diff --git a/drivers/gpu/drm/amd/amdgpu/soc21.c b/drivers/gpu/drm/amd/amdgpu/soc21.c
index 8d5c452a91007..6d3bfb0f03469 100644
--- a/drivers/gpu/drm/amd/amdgpu/soc21.c
+++ b/drivers/gpu/drm/amd/amdgpu/soc21.c
@@ -551,6 +551,10 @@ static int soc21_common_early_init(void *handle)
 			AMD_PG_SUPPORT_JPEG |
 			AMD_PG_SUPPORT_ATHUB |
 			AMD_PG_SUPPORT_MMHUB;
+		if (amdgpu_sriov_vf(adev)) {
+			adev->cg_flags = 0;
+			adev->pg_flags = 0;
+		}
 		adev->external_rev_id = adev->rev_id + 0x1; // TODO: need update
 		break;
 	case IP_VERSION(11, 0, 2):