[PATCH v3 2/7] drm/amdgpu: Add new function to set GPU power profile

[Arvind Yadav]

This patch adds a function which will change the GPU
power profile based on a submitted job. This can optimize
the power performance when the workload is on.

v2:
- Splitting workload_profile_set and workload_profile_put
  into two separate patches.
- Addressed review comment.

v3:
- Adressed all the review comment.
- Changing the function name from *_set() to *_get().
- Now setting a power profile when refcount is zero.

Cc: Shashank Sharma <shashank.sharma at amd.com>
Cc: Christian Koenig <christian.koenig at amd.com>
Cc: Alex Deucher <alexander.deucher at amd.com>
Signed-off-by: Arvind Yadav <Arvind.Yadav at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_workload.c  | 59 +++++++++++++++++++
 drivers/gpu/drm/amd/include/amdgpu_workload.h |  3 +
 2 files changed, 62 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_workload.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_workload.c
index 32166f482f77..67eacaac6c9b 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_workload.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_workload.c
@@ -24,6 +24,65 @@
 
 #include "amdgpu.h"
 
+static enum PP_SMC_POWER_PROFILE
+ring_to_power_profile(uint32_t ring_type)
+{
+	switch (ring_type) {
+	case AMDGPU_RING_TYPE_GFX:
+		return PP_SMC_POWER_PROFILE_FULLSCREEN3D;
+	case AMDGPU_RING_TYPE_COMPUTE:
+		return PP_SMC_POWER_PROFILE_COMPUTE;
+	case AMDGPU_RING_TYPE_UVD:
+	case AMDGPU_RING_TYPE_VCE:
+	case AMDGPU_RING_TYPE_UVD_ENC:
+	case AMDGPU_RING_TYPE_VCN_DEC:
+	case AMDGPU_RING_TYPE_VCN_ENC:
+	case AMDGPU_RING_TYPE_VCN_JPEG:
+		return PP_SMC_POWER_PROFILE_VIDEO;
+	default:
+		return PP_SMC_POWER_PROFILE_BOOTUP_DEFAULT;
+	}
+}
+
+static int
+amdgpu_power_profile_set(struct amdgpu_device *adev,
+			 enum PP_SMC_POWER_PROFILE profile)
+{
+	int ret = amdgpu_dpm_switch_power_profile(adev, profile, true);
+
+	if (!ret) {
+		/* Set the bit for the submitted workload profile */
+		set_bit(profile, &adev->smu_workload.submit_workload_status);
+	}
+
+	return ret;
+}
+
+void amdgpu_workload_profile_get(struct amdgpu_device *adev,
+				 uint32_t ring_type)
+{
+	struct amdgpu_smu_workload *workload = &adev->smu_workload;
+	enum PP_SMC_POWER_PROFILE profile = ring_to_power_profile(ring_type);
+	int ret, refcount;
+
+	if (profile == PP_SMC_POWER_PROFILE_BOOTUP_DEFAULT)
+		return;
+
+	mutex_lock(&workload->workload_lock);
+
+	refcount = atomic_read(&workload->power_profile_ref[profile]);
+	if (!refcount) {
+		ret = amdgpu_power_profile_set(adev, profile);
+		if (ret) {
+			DRM_WARN("Failed to set workload profile to %s, error = %d\n",
+				 amdgpu_workload_mode_name[profile], ret);
+		}
+	}
+
+	atomic_inc(&adev->smu_workload.power_profile_ref[profile]);
+	mutex_unlock(&workload->workload_lock);
+}
+
 void amdgpu_workload_profile_init(struct amdgpu_device *adev)
 {
 	adev->smu_workload.adev = adev;
diff --git a/drivers/gpu/drm/amd/include/amdgpu_workload.h b/drivers/gpu/drm/amd/include/amdgpu_workload.h
index dc12448764a3..5fc0bc2a74a4 100644
--- a/drivers/gpu/drm/amd/include/amdgpu_workload.h
+++ b/drivers/gpu/drm/amd/include/amdgpu_workload.h
@@ -46,6 +46,9 @@ static const char * const amdgpu_workload_mode_name[] = {
 	"Window3D"
 };
 
+void amdgpu_workload_profile_get(struct amdgpu_device *adev,
+				 uint32_t ring_type);
+
 void amdgpu_workload_profile_init(struct amdgpu_device *adev);
 
 void amdgpu_workload_profile_fini(struct amdgpu_device *adev);
-- 
2.34.1