From: Lijo Lazar <lijo.lazar@amd.com>
Date: Sat, 5 Jul 2025 03:15:08 +0000 (+0530)
Subject: drm/amdgpu: Use cached partition mode, if valid
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=8ff4a4b98d1f82544460a9e9c04dbe9d0ac0322f;p=thirdparty%2Flinux.git

drm/amdgpu: Use cached partition mode, if valid

For current partition mode queries, return the mode cached in partition
manager whenever it's valid.

Signed-off-by: Lijo Lazar <lijo.lazar@amd.com>
Acked-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
---

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_xcp.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_xcp.c
index c8fcafeb68645..c417f86892207 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_xcp.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_xcp.c
@@ -218,15 +218,27 @@ int amdgpu_xcp_restore_partition_mode(struct amdgpu_xcp_mgr *xcp_mgr)
 	return __amdgpu_xcp_switch_partition_mode(xcp_mgr, xcp_mgr->mode);
 }
 
-int amdgpu_xcp_query_partition_mode(struct amdgpu_xcp_mgr *xcp_mgr, u32 flags)
+static bool __amdgpu_xcp_is_cached_mode_valid(struct amdgpu_xcp_mgr *xcp_mgr)
 {
-	int mode;
+	if (!xcp_mgr->funcs || !xcp_mgr->funcs->query_partition_mode)
+		return true;
 
 	if (!amdgpu_sriov_vf(xcp_mgr->adev) &&
 	    xcp_mgr->mode == AMDGPU_XCP_MODE_NONE)
-		return xcp_mgr->mode;
+		return true;
 
-	if (!xcp_mgr->funcs || !xcp_mgr->funcs->query_partition_mode)
+	if (xcp_mgr->mode != AMDGPU_XCP_MODE_NONE &&
+	    xcp_mgr->mode != AMDGPU_XCP_MODE_TRANS)
+		return true;
+
+	return false;
+}
+
+int amdgpu_xcp_query_partition_mode(struct amdgpu_xcp_mgr *xcp_mgr, u32 flags)
+{
+	int mode;
+
+	if (__amdgpu_xcp_is_cached_mode_valid(xcp_mgr))
 		return xcp_mgr->mode;
 
 	if (!(flags & AMDGPU_XCP_FL_LOCKED))