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From d01273461600fcd798305122d28fec38aa5e2773 Mon Sep 17 00:00:00 2001
From: Alex Deucher <alexander.deucher@amd.com>
Date: Wed, 20 Nov 2019 14:20:32 -0500
Subject: [PATCH 4567/4736] drm/amdgpu: simplify runtime suspend
In the standard _PR3 case, the pci core handles the pci state.
The driver only needs to handle it in the legacy ATPX case.
This may fix issues with runtime suspend/resume on certain
hybrid graphics laptops.
Change-Id: Ifa10d4905a885132c9f8d1168eac5bbd550d1ceb
Acked-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_drv.c | 35 ++++++++++++++++---------
1 file changed, 22 insertions(+), 13 deletions(-)
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
index 6957ef4ef514..4ca9b9bde917 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
@@ -1261,13 +1261,17 @@ static int amdgpu_pmops_runtime_suspend(struct device *dev)
ret = amdgpu_device_suspend(drm_dev, false, false);
if (amdgpu_device_supports_boco(drm_dev)) {
- pci_save_state(pdev);
- pci_disable_device(pdev);
- pci_ignore_hotplug(pdev);
- if (amdgpu_is_atpx_hybrid())
+ /* Only need to handle PCI state in the driver for ATPX
+ * PCI core handles it for _PR3.
+ */
+ if (amdgpu_is_atpx_hybrid()) {
+ pci_ignore_hotplug(pdev);
+ } else {
+ pci_save_state(pdev);
+ pci_disable_device(pdev);
+ pci_ignore_hotplug(pdev);
pci_set_power_state(pdev, PCI_D3cold);
- else if (!amdgpu_has_atpx_dgpu_power_cntl())
- pci_set_power_state(pdev, PCI_D3hot);
+ }
drm_dev->switch_power_state = DRM_SWITCH_POWER_DYNAMIC_OFF;
} else if (amdgpu_device_supports_baco(drm_dev)) {
amdgpu_device_baco_enter(drm_dev);
@@ -1289,14 +1293,19 @@ static int amdgpu_pmops_runtime_resume(struct device *dev)
if (amdgpu_device_supports_boco(drm_dev)) {
drm_dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
- if (amdgpu_is_atpx_hybrid() ||
- !amdgpu_has_atpx_dgpu_power_cntl())
+ /* Only need to handle PCI state in the driver for ATPX
+ * PCI core handles it for _PR3.
+ */
+ if (amdgpu_is_atpx_hybrid()) {
+ pci_set_master(pdev);
+ } else {
pci_set_power_state(pdev, PCI_D0);
- pci_restore_state(pdev);
- ret = pci_enable_device(pdev);
- if (ret)
- return ret;
- pci_set_master(pdev);
+ pci_restore_state(pdev);
+ ret = pci_enable_device(pdev);
+ if (ret)
+ return ret;
+ pci_set_master(pdev);
+ }
} else if (amdgpu_device_supports_baco(drm_dev)) {
amdgpu_device_baco_exit(drm_dev);
}
--
2.17.1
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