From 6bd1cbdd9753860754e1567d2f2a549831bd2fbd Mon Sep 17 00:00:00 2001
From: Evan Quan <evan.quan@amd.com>
Date: Mon, 29 Nov 2021 14:02:25 +0800
Subject: drm/amd/pm: drop unneeded smu_baco->mutex
Git-commit: 1c4dba5e14c0085d412429d50cbcf8e9e2a18924
Patch-mainline: v5.18-rc1
References: jsc#PED-1166 jsc#PED-1168 jsc#PED-1170 jsc#PED-1218 jsc#PED-1220 jsc#PED-1222 jsc#PED-1223 jsc#PED-1225

As those APIs related are already well protected by adev->pm.mutex.

Signed-off-by: Evan Quan <evan.quan@amd.com>
Reviewed-by: Guchun Chen <guchun.chen@amd.com>
Reviewed-by: Lijo Lazar <lijo.lazar@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Acked-by: Patrik Jakobsson <pjakobsson@suse.de>
---
 drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c     |  1 -
 drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h |  1 -
 .../gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c    | 19 +++++--------------
 3 files changed, 5 insertions(+), 16 deletions(-)

diff --git a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
index 57f3d26b03fe..fe155a7874b0 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
@@ -567,7 +567,6 @@ static int smu_early_init(void *handle)
 	smu->adev = adev;
 	smu->pm_enabled = !!amdgpu_dpm;
 	smu->is_apu = false;
-	mutex_init(&smu->smu_baco.mutex);
 	smu->smu_baco.state = SMU_BACO_STATE_EXIT;
 	smu->smu_baco.platform_support = false;
 	smu->user_dpm_profile.fan_mode = -1;
diff --git a/drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h b/drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h
index 2cef7ff46010..79b2a817491c 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h
+++ b/drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h
@@ -428,7 +428,6 @@ enum smu_baco_state
 
 struct smu_baco_context
 {
-	struct mutex mutex;
 	uint32_t state;
 	bool platform_support;
 };
diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c b/drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c
index e94a400db669..b58a4c2823c2 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c
@@ -1617,13 +1617,8 @@ bool smu_v11_0_baco_is_support(struct smu_context *smu)
 enum smu_baco_state smu_v11_0_baco_get_state(struct smu_context *smu)
 {
 	struct smu_baco_context *smu_baco = &smu->smu_baco;
-	enum smu_baco_state baco_state;
 
-	mutex_lock(&smu_baco->mutex);
-	baco_state = smu_baco->state;
-	mutex_unlock(&smu_baco->mutex);
-
-	return baco_state;
+	return smu_baco->state;
 }
 
 #define D3HOT_BACO_SEQUENCE 0
@@ -1640,8 +1635,6 @@ int smu_v11_0_baco_set_state(struct smu_context *smu, enum smu_baco_state state)
 	if (smu_v11_0_baco_get_state(smu) == state)
 		return 0;
 
-	mutex_lock(&smu_baco->mutex);
-
 	if (state == SMU_BACO_STATE_ENTER) {
 		switch (adev->ip_versions[MP1_HWIP][0]) {
 		case IP_VERSION(11, 0, 7):
@@ -1682,18 +1675,16 @@ int smu_v11_0_baco_set_state(struct smu_context *smu, enum smu_baco_state state)
 	} else {
 		ret = smu_cmn_send_smc_msg(smu, SMU_MSG_ExitBaco, NULL);
 		if (ret)
-			goto out;
+			return ret;
 
 		/* clear vbios scratch 6 and 7 for coming asic reinit */
 		WREG32(adev->bios_scratch_reg_offset + 6, 0);
 		WREG32(adev->bios_scratch_reg_offset + 7, 0);
 	}
-	if (ret)
-		goto out;
 
-	smu_baco->state = state;
-out:
-	mutex_unlock(&smu_baco->mutex);
+	if (!ret)
+		smu_baco->state = state;
+
 	return ret;
 }
 
-- 
2.38.1