[PATCH 2/4] drm/amd/pm: drop unnecessary smu_baco->mutex lock protections(V2)

[Evan Quan]

As these operations are performed in hardware setup and there
is actually no race conditions during this period considering:
1. the hardware setup is serial and cannnot be in parallel
2. all other operations can be performed only after hardware
   setup complete.

V2: rich the commit log description

Change-Id: I7078ac26ae71eb6c7cbf918a127adfc2f56acf7d
Signed-off-by: Evan Quan <evan.quan at amd.com>
---
 drivers/gpu/drm/amd/pm/swsmu/smu11/arcturus_ppt.c       | 2 --
 drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c         | 2 --
 drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c | 2 --
 drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c          | 7 +------
 4 files changed, 1 insertion(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu11/arcturus_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu11/arcturus_ppt.c
index 8347b1f2509f..4195b5b9e8e5 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu11/arcturus_ppt.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/arcturus_ppt.c
@@ -386,11 +386,9 @@ static int arcturus_check_powerplay_table(struct smu_context *smu)
 		table_context->power_play_table;
 	struct smu_baco_context *smu_baco = &smu->smu_baco;
 
-	mutex_lock(&smu_baco->mutex);
 	if (powerplay_table->platform_caps & SMU_11_0_PP_PLATFORM_CAP_BACO ||
 	    powerplay_table->platform_caps & SMU_11_0_PP_PLATFORM_CAP_MACO)
 		smu_baco->platform_support = true;
-	mutex_unlock(&smu_baco->mutex);
 
 	table_context->thermal_controller_type =
 		powerplay_table->thermal_controller_type;
diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c
index 72f3d68691d8..f4b26399b413 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c
@@ -347,11 +347,9 @@ static int navi10_check_powerplay_table(struct smu_context *smu)
 	if (powerplay_table->platform_caps & SMU_11_0_PP_PLATFORM_CAP_HARDWAREDC)
 		smu->dc_controlled_by_gpio = true;
 
-	mutex_lock(&smu_baco->mutex);
 	if (powerplay_table->platform_caps & SMU_11_0_PP_PLATFORM_CAP_BACO ||
 	    powerplay_table->platform_caps & SMU_11_0_PP_PLATFORM_CAP_MACO)
 		smu_baco->platform_support = true;
-	mutex_unlock(&smu_baco->mutex);
 
 	table_context->thermal_controller_type =
 		powerplay_table->thermal_controller_type;
diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c
index 66d655958a78..c19f526c5a22 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c
@@ -296,11 +296,9 @@ static int sienna_cichlid_check_powerplay_table(struct smu_context *smu)
 		table_context->power_play_table;
 	struct smu_baco_context *smu_baco = &smu->smu_baco;
 
-	mutex_lock(&smu_baco->mutex);
 	if (powerplay_table->platform_caps & SMU_11_0_7_PP_PLATFORM_CAP_BACO ||
 	    powerplay_table->platform_caps & SMU_11_0_7_PP_PLATFORM_CAP_MACO)
 		smu_baco->platform_support = true;
-	mutex_unlock(&smu_baco->mutex);
 
 	table_context->thermal_controller_type =
 		powerplay_table->thermal_controller_type;
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 28a19ffd22a1..005673bedc2f 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
@@ -1434,13 +1434,8 @@ static int smu_v11_0_baco_set_armd3_sequence(struct smu_context *smu, enum smu_v
 bool smu_v11_0_baco_is_support(struct smu_context *smu)
 {
 	struct smu_baco_context *smu_baco = &smu->smu_baco;
-	bool baco_support;
 
-	mutex_lock(&smu_baco->mutex);
-	baco_support = smu_baco->platform_support;
-	mutex_unlock(&smu_baco->mutex);
-
-	if (!baco_support)
+	if (!smu_baco->platform_support)
 		return false;
 
 	/* Arcturus does not support this bit mask */
-- 
2.28.0