[PATCH v2] drm/amd: Don't reset dGPUs if the system is going to s2idle

[Mario Limonciello]

An A+A configuration on ASUS ROG Strix G513QY proves that the ASIC
reset for handling aborted suspend can't work with s2idle.

This functionality was introduced in commit daf8de0874ab5b ("drm/amdgpu:
always reset the asic in suspend (v2)").  A few other commits have
gone on top of the ASIC reset, but this still doesn't work on the A+A
configuration in s2idle.

Avoid doing the reset on dGPUs specifically when using s2idle.

Fixes: daf8de0874ab5b ("drm/amdgpu: always reset the asic in suspend (v2)")
Link: https://gitlab.freedesktop.org/drm/amd/-/issues/2008
Signed-off-by: Mario Limonciello <mario.limonciello at amd.com>
---
v1->v2:
 * Add missing stub function for non CONFIG_ACPI case

 drivers/gpu/drm/amd/amdgpu/amdgpu.h      |  2 ++
 drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c | 14 ++++++++++++++
 drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c  |  2 +-
 3 files changed, 17 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 3c20c2eadf4e..76df583663c7 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -1378,9 +1378,11 @@ static inline int amdgpu_acpi_smart_shift_update(struct drm_device *dev,
 
 #if defined(CONFIG_ACPI) && defined(CONFIG_SUSPEND)
 bool amdgpu_acpi_is_s3_active(struct amdgpu_device *adev);
+bool amdgpu_acpi_should_gpu_reset(struct amdgpu_device *adev);
 bool amdgpu_acpi_is_s0ix_active(struct amdgpu_device *adev);
 #else
 static inline bool amdgpu_acpi_is_s0ix_active(struct amdgpu_device *adev) { return false; }
+static inline bool amdgpu_acpi_should_gpu_reset(struct amdgpu_device *adev) { return false; }
 static inline bool amdgpu_acpi_is_s3_active(struct amdgpu_device *adev) { return false; }
 #endif
 
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
index 0e12315fa0cb..98ac53ee6bb5 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_acpi.c
@@ -1045,6 +1045,20 @@ bool amdgpu_acpi_is_s3_active(struct amdgpu_device *adev)
 		(pm_suspend_target_state == PM_SUSPEND_MEM);
 }
 
+/**
+ * amdgpu_acpi_should_gpu_reset
+ *
+ * @adev: amdgpu_device_pointer
+ *
+ * returns true if should reset GPU, false if not
+ */
+bool amdgpu_acpi_should_gpu_reset(struct amdgpu_device *adev)
+{
+	if (adev->flags & AMD_IS_APU)
+		return false;
+	return pm_suspend_target_state != PM_SUSPEND_TO_IDLE;
+}
+
 /**
  * amdgpu_acpi_is_s0ix_active
  *
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index 16871baee784..a84766c13ac5 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -2315,7 +2315,7 @@ static int amdgpu_pmops_suspend_noirq(struct device *dev)
 	struct drm_device *drm_dev = dev_get_drvdata(dev);
 	struct amdgpu_device *adev = drm_to_adev(drm_dev);
 
-	if (!adev->in_s0ix)
+	if (amdgpu_acpi_should_gpu_reset(adev))
 		return amdgpu_asic_reset(adev);
 
 	return 0;
-- 
2.25.1