drm/amd/pm: drop unnecessary smu_baco->mutex lock protections(V2)

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 cannot be in parallel
2. all other operations can be performed only after hardware
   setup complete.

V2: rich the commit log description

Signed-off-by: Evan Quan <evan.quan@amd.com>
Acked-by: Nirmoy Das <nirmoy.das@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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 2ce6ad9..d298fa6 100644 (file)
--- 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 3559ba0..7e1d6c2 100644 (file)
--- a/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c
@@ -336,11 +336,9 @@ 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 9cf4e9a..be9cd03 100644 (file)
--- a/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/sienna_cichlid_ppt.c
@@ -298,11 +298,9 @@ 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 48987f3..4aa257c 100644 (file)
--- a/drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/smu_v11_0.c
@@ -1426,13 +1426,8 @@ 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 */