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From: Evan Quan <evan.quan@amd.com>
To: amd-gfx@lists.freedesktop.org
Cc: alexander.deucher@amd.com, Evan Quan <evan.quan@amd.com>
Subject: [PATCH 2/4] drm/amd/pm: drop unnecessary smu_baco->mutex lock protections(V2)
Date: Tue, 25 Aug 2020 15:49:21 +0800	[thread overview]
Message-ID: <20200825074923.32345-2-evan.quan@amd.com> (raw)
In-Reply-To: <20200825074923.32345-1-evan.quan@amd.com>

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@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

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  reply	other threads:[~2020-08-25  7:49 UTC|newest]

Thread overview: 10+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-08-25  7:49 [PATCH 1/4] drm/amd/pm: drop unnecessary feature->mutex lock protections(V2) Evan Quan
2020-08-25  7:49 ` Evan Quan [this message]
2020-08-27  5:12   ` [PATCH 2/4] drm/amd/pm: drop unnecessary smu_baco->mutex " Quan, Evan
2020-08-25  7:49 ` [PATCH 3/4] drm/amd/pm: drop unnecessary table existence and dpm enablement check Evan Quan
2020-08-25  7:49 ` [PATCH 4/4] drm/amd/pm: minor cleanups Evan Quan
2020-08-27  5:12 ` [PATCH 1/4] drm/amd/pm: drop unnecessary feature->mutex lock protections(V2) Quan, Evan
2020-08-27  6:39 ` Nirmoy
2020-08-28  8:16   ` Christian König
2020-08-28 14:16     ` Deucher, Alexander
2020-08-31  7:01       ` Quan, Evan

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