linux-kernel - RE: [PATCH 5.15 138/230] drm/amdgpu: bind to any 0x1002 PCI diplay class device

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Message-ID: <BL1PR12MB514417DBBDC4502936002F8BF7879@BL1PR12MB5144.namprd12.prod.outlook.com>
Date:   Mon, 11 Jul 2022 14:01:50 +0000
From:   "Deucher, Alexander" <Alexander.Deucher@....com>
To:     "Koenig, Christian" <Christian.Koenig@....com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
CC:     "stable@...r.kernel.org" <stable@...r.kernel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: RE: [PATCH 5.15 138/230] drm/amdgpu: bind to any 0x1002 PCI diplay
 class device

[Public]

> -----Original Message-----
> From: Koenig, Christian <Christian.Koenig@....com>
> Sent: Monday, July 11, 2022 5:30 AM
> To: Greg Kroah-Hartman <gregkh@...uxfoundation.org>; Deucher,
> Alexander <Alexander.Deucher@....com>; linux-kernel@...r.kernel.org
> Cc: stable@...r.kernel.org; Sasha Levin <sashal@...nel.org>
> Subject: Re: [PATCH 5.15 138/230] drm/amdgpu: bind to any 0x1002 PCI
> diplay class device
> 
> Hi Greg & Alex
> 
> why is that patch picked up for stable? Or are we backporting IP based
> discovery?
> 

Looks like Sasha picked it up.  This should not go to stable.

Alex

> If yes, is that wise? IIRC we had quite a number of typos etc.. in the initial
> patches.
> 
> Regards,
> Christian.
> 
> Am 11.07.22 um 11:06 schrieb Greg Kroah-Hartman:
> > From: Alex Deucher <alexander.deucher@....com>
> >
> > [ Upstream commit eb4fd29afd4aa1c98d882800ceeee7d1f5262803 ]
> >
> > Bind to all 0x1002 GPU devices.
> >
> > For now we explicitly return -ENODEV for generic bindings.
> > Remove this check once IP discovery based checking is in place.
> >
> > v2: rebase (Alex)
> >
> > Reviewed-by: Christian König <christian.koenig@....com>
> > Signed-off-by: Alex Deucher <alexander.deucher@....com>
> > Signed-off-by: Sasha Levin <sashal@...nel.org>
> > ---
> >   drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c | 15 +++++++++++++++
> >   1 file changed, 15 insertions(+)
> >
> > diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> > b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> > index f65b4b233ffb..c294081022bd 100644
> > --- a/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> > +++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_drv.c
> > @@ -1952,6 +1952,16 @@ static const struct pci_device_id pciidlist[] = {
> >   	{0x1002, 0x7424, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_BEIGE_GOBY},
> >   	{0x1002, 0x743F, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_BEIGE_GOBY},
> >
> > +	{ PCI_DEVICE(0x1002, PCI_ANY_ID),
> > +	  .class = PCI_CLASS_DISPLAY_VGA << 8,
> > +	  .class_mask = 0xffffff,
> > +	  .driver_data = 0 },
> > +
> > +	{ PCI_DEVICE(0x1002, PCI_ANY_ID),
> > +	  .class = PCI_CLASS_DISPLAY_OTHER << 8,
> > +	  .class_mask = 0xffffff,
> > +	  .driver_data = 0 },
> > +
> >   	{0, 0, 0}
> >   };
> >
> > @@ -1999,6 +2009,11 @@ static int amdgpu_pci_probe(struct pci_dev
> *pdev,
> >   			return -ENODEV;
> >   	}
> >
> > +	if (flags == 0) {
> > +		DRM_INFO("Unsupported asic.  Remove me when IP
> discovery init is in place.\n");
> > +		return -ENODEV;
> > +	}
> > +
> >   	if (amdgpu_virtual_display ||
> >   	    amdgpu_device_asic_has_dc_support(flags & AMD_ASIC_MASK))
> >   		supports_atomic = true;