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From f98544ea9af75cdf57211c6a55b63dcf1ffeb999 Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Fri, 4 Oct 2019 12:33:09 -0500
Subject: [PATCH 4548/4736] drm/amdgpu: add helpers for baco entry and exit
BACO - Bus Active, Chip Off
Will be used for runtime pm. Entry will enter the BACO
state (chip off). Exit will exit the BACO state (chip on).
Change-Id: I051a4b9996af9ee7c7639be65fbd5009a4379ab3
Reviewed-by: Evan Quan <evan.quan@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Signed-off-by: Rahul Kumar <rahul.kumar1@amd.com>
---
drivers/gpu/drm/amd/amdgpu/amdgpu.h | 3 +-
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 62 ++++++++++++++++++++++
2 files changed, 64 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index e0423a9efe14..9679649082cb 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -1192,7 +1192,8 @@ bool amdgpu_device_supports_boco(struct drm_device *dev);
bool amdgpu_device_supports_baco(struct drm_device *dev);
bool amdgpu_device_is_peer_accessible(struct amdgpu_device *adev,
struct amdgpu_device *peer_adev);
-
+int amdgpu_device_baco_enter(struct drm_device *dev);
+int amdgpu_device_baco_exit(struct drm_device *dev);
/* atpx handler */
#if defined(CONFIG_VGA_SWITCHEROO)
void amdgpu_register_atpx_handler(void);
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
index ac0dd28ca0a1..ebdf775ab9b0 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
@@ -4333,3 +4333,65 @@ bool amdgpu_device_is_peer_accessible(struct amdgpu_device *adev,
!(adev->gmc.aper_base & address_mask ||
aper_limit & address_mask);
}
+
+int amdgpu_device_baco_enter(struct drm_device *dev)
+{
+ struct amdgpu_device *adev = dev->dev_private;
+
+ if (!amdgpu_device_supports_baco(adev->ddev))
+ return -ENOTSUPP;
+
+ if (is_support_sw_smu(adev)) {
+ struct smu_context *smu = &adev->smu;
+ int ret;
+
+ ret = smu_baco_enter(smu);
+ if (ret)
+ return ret;
+
+ return 0;
+ } else {
+ void *pp_handle = adev->powerplay.pp_handle;
+ const struct amd_pm_funcs *pp_funcs = adev->powerplay.pp_funcs;
+
+ if (!pp_funcs ||!pp_funcs->get_asic_baco_state ||!pp_funcs->set_asic_baco_state)
+ return -ENOENT;
+
+ /* enter BACO state */
+ if (pp_funcs->set_asic_baco_state(pp_handle, 1))
+ return -EIO;
+
+ return 0;
+ }
+}
+
+int amdgpu_device_baco_exit(struct drm_device *dev)
+{
+ struct amdgpu_device *adev = dev->dev_private;
+
+ if (!amdgpu_device_supports_baco(adev->ddev))
+ return -ENOTSUPP;
+
+ if (is_support_sw_smu(adev)) {
+ struct smu_context *smu = &adev->smu;
+ int ret;
+
+ ret = smu_baco_exit(smu);
+ if (ret)
+ return ret;
+
+ return 0;
+ } else {
+ void *pp_handle = adev->powerplay.pp_handle;
+ const struct amd_pm_funcs *pp_funcs = adev->powerplay.pp_funcs;
+
+ if (!pp_funcs ||!pp_funcs->get_asic_baco_state ||!pp_funcs->set_asic_baco_state)
+ return -ENOENT;
+
+ /* exit BACO state */
+ if (pp_funcs->set_asic_baco_state(pp_handle, 0))
+ return -EIO;
+
+ return 0;
+ }
+}
--
2.17.1
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