[PATCH 2/7] drm/amd/pm: drop unneeded vcn/jpeg_gate_lock

[Chen, Guchun]

[Public]

err0_out:
-	mutex_unlock(&power_gate->jpeg_gate_lock);
-	mutex_unlock(&power_gate->vcn_gate_lock);
-
 	return ret;

Is it better to refactor the code to drop error path of "err0_out"?

Regards,
Guchun

-----Original Message-----
From: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> On Behalf Of Evan Quan
Sent: Thursday, January 6, 2022 1:57 PM
To: amd-gfx at lists.freedesktop.org
Cc: Deucher, Alexander <Alexander.Deucher at amd.com>; Quan, Evan <Evan.Quan at amd.com>
Subject: [PATCH 2/7] drm/amd/pm: drop unneeded vcn/jpeg_gate_lock

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

Signed-off-by: Evan Quan <evan.quan at amd.com>
Change-Id: I762fab96bb1c034c153b029f939ec6e498460007
---
 drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c     | 56 +++----------------
 drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h |  2 -
 2 files changed, 8 insertions(+), 50 deletions(-)

diff --git a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
index ae91ef2078bf..ecbc768dfe2f 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
@@ -158,8 +158,8 @@ static u32 smu_get_sclk(void *handle, bool low)
 	return clk_freq * 100;
 }
 
-static int smu_dpm_set_vcn_enable_locked(struct smu_context *smu,
-					 bool enable)
+static int smu_dpm_set_vcn_enable(struct smu_context *smu,
+				  bool enable)
 {
 	struct smu_power_context *smu_power = &smu->smu_power;
 	struct smu_power_gate *power_gate = &smu_power->power_gate; @@ -178,24 +178,8 @@ static int smu_dpm_set_vcn_enable_locked(struct smu_context *smu,
 	return ret;
 }
 
-static int smu_dpm_set_vcn_enable(struct smu_context *smu,
-				  bool enable)
-{
-	struct smu_power_context *smu_power = &smu->smu_power;
-	struct smu_power_gate *power_gate = &smu_power->power_gate;
-	int ret = 0;
-
-	mutex_lock(&power_gate->vcn_gate_lock);
-
-	ret = smu_dpm_set_vcn_enable_locked(smu, enable);
-
-	mutex_unlock(&power_gate->vcn_gate_lock);
-
-	return ret;
-}
-
-static int smu_dpm_set_jpeg_enable_locked(struct smu_context *smu,
-					  bool enable)
+static int smu_dpm_set_jpeg_enable(struct smu_context *smu,
+				   bool enable)
 {
 	struct smu_power_context *smu_power = &smu->smu_power;
 	struct smu_power_gate *power_gate = &smu_power->power_gate; @@ -214,22 +198,6 @@ static int smu_dpm_set_jpeg_enable_locked(struct smu_context *smu,
 	return ret;
 }
 
-static int smu_dpm_set_jpeg_enable(struct smu_context *smu,
-				   bool enable)
-{
-	struct smu_power_context *smu_power = &smu->smu_power;
-	struct smu_power_gate *power_gate = &smu_power->power_gate;
-	int ret = 0;
-
-	mutex_lock(&power_gate->jpeg_gate_lock);
-
-	ret = smu_dpm_set_jpeg_enable_locked(smu, enable);
-
-	mutex_unlock(&power_gate->jpeg_gate_lock);
-
-	return ret;
-}
-
 /**
  * smu_dpm_set_power_gate - power gate/ungate the specific IP block
  *
@@ -619,17 +587,14 @@ static int smu_set_default_dpm_table(struct smu_context *smu)
 	if (!smu->ppt_funcs->set_default_dpm_table)
 		return 0;
 
-	mutex_lock(&power_gate->vcn_gate_lock);
-	mutex_lock(&power_gate->jpeg_gate_lock);
-
 	vcn_gate = atomic_read(&power_gate->vcn_gated);
 	jpeg_gate = atomic_read(&power_gate->jpeg_gated);
 
-	ret = smu_dpm_set_vcn_enable_locked(smu, true);
+	ret = smu_dpm_set_vcn_enable(smu, true);
 	if (ret)
 		goto err0_out;
 
-	ret = smu_dpm_set_jpeg_enable_locked(smu, true);
+	ret = smu_dpm_set_jpeg_enable(smu, true);
 	if (ret)
 		goto err1_out;
 
@@ -638,13 +603,10 @@ static int smu_set_default_dpm_table(struct smu_context *smu)
 		dev_err(smu->adev->dev,
 			"Failed to setup default dpm clock tables!\n");
 
-	smu_dpm_set_jpeg_enable_locked(smu, !jpeg_gate);
+	smu_dpm_set_jpeg_enable(smu, !jpeg_gate);
 err1_out:
-	smu_dpm_set_vcn_enable_locked(smu, !vcn_gate);
+	smu_dpm_set_vcn_enable(smu, !vcn_gate);
 err0_out:
-	mutex_unlock(&power_gate->jpeg_gate_lock);
-	mutex_unlock(&power_gate->vcn_gate_lock);
-
 	return ret;
 }
 
@@ -1006,8 +968,6 @@ static int smu_sw_init(void *handle)
 
 	atomic_set(&smu->smu_power.power_gate.vcn_gated, 1);
 	atomic_set(&smu->smu_power.power_gate.jpeg_gated, 1);
-	mutex_init(&smu->smu_power.power_gate.vcn_gate_lock);
-	mutex_init(&smu->smu_power.power_gate.jpeg_gate_lock);
 
 	smu->workload_mask = 1 << smu->workload_prority[PP_SMC_POWER_PROFILE_BOOTUP_DEFAULT];
 	smu->workload_prority[PP_SMC_POWER_PROFILE_BOOTUP_DEFAULT] = 0; 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 00760f3c6da5..c3efe4fea5e0 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h
+++ b/drivers/gpu/drm/amd/pm/swsmu/inc/amdgpu_smu.h
@@ -376,8 +376,6 @@ struct smu_power_gate {
 	bool vce_gated;
 	atomic_t vcn_gated;
 	atomic_t jpeg_gated;
-	struct mutex vcn_gate_lock;
-	struct mutex jpeg_gate_lock;
 };
 
 struct smu_power_context {
--
2.29.0