[PATCH 1/4] drm/amd/pm: correct gfx and pcie settings on umd pstate switching

[Evan Quan]

For entering UMD stable Pstate, the operations to enter rlc_safe
mode, disable mgcg_perfmon and disable PCIE aspm are needed. And
the opposite operations should be performed on UMD stable Pstate
exiting.

Change-Id: Iff4aa465fd16f55a4f4de8ee0503997b204f8f9d
Signed-off-by: Evan Quan <evan.quan at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu.h       | 3 +++
 drivers/gpu/drm/amd/amdgpu/nv.c           | 7 +++++++
 drivers/gpu/drm/amd/amdgpu/soc15.c        | 7 +++++++
 drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c | 2 ++
 4 files changed, 19 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 8ba389780001..6ff4ddb09d1f 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -617,6 +617,8 @@ struct amdgpu_asic_funcs {
 	uint64_t (*get_pcie_replay_count)(struct amdgpu_device *adev);
 	/* device supports BACO */
 	bool (*supports_baco)(struct amdgpu_device *adev);
+	/* enter/exit umd stable pstate */
+	int (*update_umd_stable_pstate)(struct amdgpu_device *adev, bool enter);
 };
 
 /*
@@ -1132,6 +1134,7 @@ int emu_soc_asic_init(struct amdgpu_device *adev);
 #define amdgpu_asic_need_reset_on_init(adev) (adev)->asic_funcs->need_reset_on_init((adev))
 #define amdgpu_asic_get_pcie_replay_count(adev) ((adev)->asic_funcs->get_pcie_replay_count((adev)))
 #define amdgpu_asic_supports_baco(adev) (adev)->asic_funcs->supports_baco((adev))
+#define amdgpu_asic_update_umd_stable_pstate(adev, enter) (adev)->asic_funcs->update_umd_stable_pstate((adev), (enter))
 
 #define amdgpu_inc_vram_lost(adev) atomic_inc(&((adev)->vram_lost_counter));
 
diff --git a/drivers/gpu/drm/amd/amdgpu/nv.c b/drivers/gpu/drm/amd/amdgpu/nv.c
index 54e941e0db60..d07c84a7543d 100644
--- a/drivers/gpu/drm/amd/amdgpu/nv.c
+++ b/drivers/gpu/drm/amd/amdgpu/nv.c
@@ -691,6 +691,12 @@ static void nv_init_doorbell_index(struct amdgpu_device *adev)
 	adev->doorbell_index.sdma_doorbell_range = 20;
 }
 
+static int nv_update_umd_stable_pstate(struct amdgpu_device *adev,
+				       bool enter)
+{
+	return 0;
+}
+
 static const struct amdgpu_asic_funcs nv_asic_funcs =
 {
 	.read_disabled_bios = &nv_read_disabled_bios,
@@ -710,6 +716,7 @@ static const struct amdgpu_asic_funcs nv_asic_funcs =
 	.need_reset_on_init = &nv_need_reset_on_init,
 	.get_pcie_replay_count = &nv_get_pcie_replay_count,
 	.supports_baco = &nv_asic_supports_baco,
+	.update_umd_stable_pstate = &nv_update_umd_stable_pstate,
 };
 
 static int nv_common_early_init(void *handle)
diff --git a/drivers/gpu/drm/amd/amdgpu/soc15.c b/drivers/gpu/drm/amd/amdgpu/soc15.c
index 3cd98c144bc6..d9671db3b98d 100644
--- a/drivers/gpu/drm/amd/amdgpu/soc15.c
+++ b/drivers/gpu/drm/amd/amdgpu/soc15.c
@@ -1029,6 +1029,12 @@ static uint64_t soc15_get_pcie_replay_count(struct amdgpu_device *adev)
 	return (nak_r + nak_g);
 }
 
+static int soc15_update_umd_stable_pstate(struct amdgpu_device *adev,
+					  bool enter)
+{
+	return 0;
+}
+
 static const struct amdgpu_asic_funcs soc15_asic_funcs =
 {
 	.read_disabled_bios = &soc15_read_disabled_bios,
@@ -1049,6 +1055,7 @@ static const struct amdgpu_asic_funcs soc15_asic_funcs =
 	.need_reset_on_init = &soc15_need_reset_on_init,
 	.get_pcie_replay_count = &soc15_get_pcie_replay_count,
 	.supports_baco = &soc15_supports_baco,
+	.update_umd_stable_pstate = &soc15_update_umd_stable_pstate,
 };
 
 static const struct amdgpu_asic_funcs vega20_asic_funcs =
diff --git a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
index 8eb5b92903cd..db0f1718087d 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
@@ -1442,6 +1442,7 @@ static int smu_enable_umd_pstate(void *handle,
 							       AMD_CG_STATE_UNGATE);
 			smu_gfx_ulv_control(smu, false);
 			smu_deep_sleep_control(smu, false);
+			amdgpu_asic_update_umd_stable_pstate(smu->adev, true);
 		}
 	} else {
 		/* exit umd pstate, restore level, enable gfx cg*/
@@ -1449,6 +1450,7 @@ static int smu_enable_umd_pstate(void *handle,
 			if (*level == AMD_DPM_FORCED_LEVEL_PROFILE_EXIT)
 				*level = smu_dpm_ctx->saved_dpm_level;
 			smu_dpm_ctx->enable_umd_pstate = false;
+			amdgpu_asic_update_umd_stable_pstate(smu->adev, false);
 			smu_deep_sleep_control(smu, true);
 			smu_gfx_ulv_control(smu, true);
 			amdgpu_device_ip_set_clockgating_state(smu->adev,
-- 
2.28.0