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drm/amdgpu: lock and unlock console only for amdgpu_fbdev_set_suspend [V5] 

[Why]
While the console_lock is held, console output will be buffered, till
its unlocked it wont be emitted, hence its ideal to unlock sooner to enable
debugging/detecting/fixing of any issue in the remaining sequence of events
in resume path.
The concern here is about consoles other than fbcon on the device,
e.g. a serial console

[How]
This patch restructures the console_lock, console_unlock around
amdgpu_fbdev_set_suspend() and moves this new block appropriately.

V2: Kept amdgpu_fbdev_set_suspend after pci_set_power_state
V3: Updated the commit message to clarify the real concern that this patch
    addresses.
V4: code clean-up.
V5: fixed return value

Signed-off-by: Shirish S <shirish.s@amd.com>
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Shirish S 2018-07-18 13:36:26 +05:30 committed by Alex Deucher
parent 1bc460a45b
commit 4d3b9ae50e
1 changed files with 7 additions and 15 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

22
drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
View File

@ -2720,15 +2720,12 @@ int amdgpu_device_resume(struct drm_device *dev, bool resume, bool fbcon)
if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
return 0;
if (fbcon)
console_lock();
if (resume) {
pci_set_power_state(dev->pdev, PCI_D0);
pci_restore_state(dev->pdev);
r = pci_enable_device(dev->pdev);
if (r)
goto unlock;
return r;
}
/* post card */
@ -2741,14 +2738,14 @@ int amdgpu_device_resume(struct drm_device *dev, bool resume, bool fbcon)
r = amdgpu_device_ip_resume(adev);
if (r) {
DRM_ERROR("amdgpu_device_ip_resume failed (%d).\n", r);
goto unlock;
return r;
}
amdgpu_fence_driver_resume(adev);
r = amdgpu_device_ip_late_init(adev);
if (r)
goto unlock;
return r;
/* pin cursors */
list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
@ -2783,6 +2780,9 @@ int amdgpu_device_resume(struct drm_device *dev, bool resume, bool fbcon)
}
drm_modeset_unlock_all(dev);
}
console_lock();
amdgpu_fbdev_set_suspend(adev, 0);
console_unlock();
}
drm_kms_helper_poll_enable(dev);
@ -2806,15 +2806,7 @@ int amdgpu_device_resume(struct drm_device *dev, bool resume, bool fbcon)
#ifdef CONFIG_PM
dev->dev->power.disable_depth--;
#endif
if (fbcon)
amdgpu_fbdev_set_suspend(adev, 0);
unlock:
if (fbcon)
console_unlock();
return r;
return 0;
}
/**