> -----Original Message-----
> From: Qu, Jim
> Sent: Monday, August 22, 2016 10:05 PM
> To: Zhou, David(ChunMing); Alex Deucher; amd-gfx at lists.freedesktop.org
> Cc: Deucher, Alexander
> Subject: ç?å¤?: [PATCH 1/2] drm/amdgpu: reset the asic when hibernating
>
> I have a question:
>
> if driver reset the asic in freeze(), Does not need to re-init the asic in thaw()?
Yes, it should already be taken care of in thaw. Thaw calls amdgpu_resume_kms() which calls amdgpu_asic_init() if the card isnâ??t posted which I think should be the case after a GPU reset.
Alex
>
> Thanks
> JimQu
>
> ________________________________________
> å??件人: amd-gfx <amd-gfx-bounces at lists.freedesktop.org> 代表 zhoucm1
> <david1.zhou at amd.com>
> å??é??æ?¶é?´: 2016å¹´8æ??23æ?¥ 9:52:42
> �件人: Alex Deucher; amd-gfx at lists.freedesktop.org
> æ??é??: Deucher, Alexander
> 主�: Re: [PATCH 1/2] drm/amdgpu: reset the asic when hibernating
>
> This series is Reviewed-by: Chunming Zhou <david1.zhou at amd.com>
>
>
>
> On 2016å¹´08æ??23æ?¥ 00:05, Alex Deucher wrote:
> > Some blocks require a reset to properly resume if there
> > is no power down of the asic like during various
> > hibernation steps.
> >
> > Port of:
> > 274ad65c9d02bdcbee9bae045517864c3521d530
> > (drm/radeon: hard reset r600 and newer GPU when hibernating.)
> > from radeon.
> >
> > Signed-off-by: Alex Deucher <alexander.deucher at amd.com>
> > ---
> > drivers/gpu/drm/amd/amdgpu/amdgpu.h | 3 ++-
> > drivers/gpu/drm/amd/amdgpu/amdgpu_device.c | 10 +++++++---
> > drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 6 +++---
> > 3 files changed, 12 insertions(+), 7 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> > index 6fa8268..d0d0588 100644
> > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
> > @@ -2436,7 +2436,8 @@ void amdgpu_driver_postclose_kms(struct
> drm_device *dev,
> > struct drm_file *file_priv);
> > void amdgpu_driver_preclose_kms(struct drm_device *dev,
> > struct drm_file *file_priv);
> > -int amdgpu_suspend_kms(struct drm_device *dev, bool suspend, bool
> fbcon);
> > +int amdgpu_suspend_kms(struct drm_device *dev, bool suspend, bool
> fbcon,
> > + bool freeze);
> > int amdgpu_resume_kms(struct drm_device *dev, bool resume, bool
> fbcon);
> > u32 amdgpu_get_vblank_counter_kms(struct drm_device *dev, unsigned
> int pipe);
> > int amdgpu_enable_vblank_kms(struct drm_device *dev, unsigned int
> pipe);
> > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> > index 21f4b74..5747e37 100644
> > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_device.c
> > @@ -1037,7 +1037,7 @@ static void amdgpu_switcheroo_set_state(struct
> pci_dev *pdev, enum vga_switchero
> > printk(KERN_INFO "amdgpu: switched off\n");
> > drm_kms_helper_poll_disable(dev);
> > dev->switch_power_state = DRM_SWITCH_POWER_CHANGING;
> > - amdgpu_suspend_kms(dev, true, true);
> > + amdgpu_suspend_kms(dev, true, true, false);
> > dev->switch_power_state = DRM_SWITCH_POWER_OFF;
> > }
> > }
> > @@ -1780,7 +1780,8 @@ void amdgpu_device_fini(struct amdgpu_device
> *adev)
> > * Returns 0 for success or an error on failure.
> > * Called at driver suspend.
> > */
> > -int amdgpu_suspend_kms(struct drm_device *dev, bool suspend, bool
> fbcon)
> > +int amdgpu_suspend_kms(struct drm_device *dev, bool suspend, bool
> fbcon,
> > + bool freeze)
> > {
> > struct amdgpu_device *adev;
> > struct drm_crtc *crtc;
> > @@ -1844,7 +1845,10 @@ int amdgpu_suspend_kms(struct drm_device
> *dev, bool suspend, bool fbcon)
> > amdgpu_bo_evict_vram(adev);
> >
> > pci_save_state(dev->pdev);
> > - if (suspend) {
> > + if (freeze) {
> > + /* reset the asic during freeze */
> > + r = amdgpu_asic_reset(adev);
> > + } else if (suspend) {
> > /* Shut down the device */
> > pci_disable_device(dev->pdev);
> > pci_set_power_state(dev->pdev, PCI_D3hot);
> > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> > index 58b1db8..eb4c9b0 100644
> > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> > @@ -395,7 +395,7 @@ static int amdgpu_pmops_suspend(struct device
> *dev)
> > {
> > struct pci_dev *pdev = to_pci_dev(dev);
> > struct drm_device *drm_dev = pci_get_drvdata(pdev);
> > - return amdgpu_suspend_kms(drm_dev, true, true);
> > + return amdgpu_suspend_kms(drm_dev, true, true, false);
> > }
> >
> > static int amdgpu_pmops_resume(struct device *dev)
> > @@ -409,7 +409,7 @@ static int amdgpu_pmops_freeze(struct device
> *dev)
> > {
> > struct pci_dev *pdev = to_pci_dev(dev);
> > struct drm_device *drm_dev = pci_get_drvdata(pdev);
> > - return amdgpu_suspend_kms(drm_dev, false, true);
> > + return amdgpu_suspend_kms(drm_dev, false, true, true);
> > }
> >
> > static int amdgpu_pmops_thaw(struct device *dev)
> > @@ -434,7 +434,7 @@ static int amdgpu_pmops_runtime_suspend(struct
> device *dev)
> > drm_kms_helper_poll_disable(drm_dev);
> > vga_switcheroo_set_dynamic_switch(pdev, VGA_SWITCHEROO_OFF);
> >
> > - ret = amdgpu_suspend_kms(drm_dev, false, false);
> > + ret = amdgpu_suspend_kms(drm_dev, false, false, false);
> > pci_save_state(pdev);
> > pci_disable_device(pdev);
> > pci_ignore_hotplug(pdev);
>
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