NAK [G]:[PATCH 1/1][SRU][OEM-5.6/G] UBUNTU: SAUCE: PCI/ASPM: VMD: add ASPM quirk for 8086:a0bc

[Kai-Heng Feng]

> On Aug 31, 2020, at 17:35, You-Sheng Yang <vicamo.yang at canonical.com> wrote:
> 
> BugLink: https://bugs.launchpad.net/bugs/1893194
> 
> One VMD equipped platform has another PCI bridge with PCI ID [8086:a0bc]
> that is not already in Ubuntu sauced PCI_DEV_FLAGS_ENABLE_ASPM list.
> Link Capability Register shows ASPM L1 supported, but has ASPM Disabled
> in Link Control status:
> 
> 10000:e0:1c.4 PCI bridge [0604]: Intel Corporation Device [8086:a0bc]
> (rev 20) (prog-if 00 [Normal decode])
>        ...
> Capabilities: [40] Express (v2) Root Port (Slot+), MSI 00
>  ...
>  LnkCap: Port #5, Speed 8GT/s, Width x4, ASPM L1, Exit Latency L1 <16us
>   ClockPM- Surprise- LLActRep+ BwNot+ ASPMOptComp+
>  LnkCtl: ASPM Disabled; RCB 64 bytes Disabled- CommClk+
>   ExtSynch- ClockPM- AutWidDis- BWInt- AutBWInt-
> 
> This adds an additional device [8086:a0bc], a PCI bridge behind VMD
> controller, to enable its ASPM.
> 
> Signed-off-by: You-Sheng Yang <vicamo.yang at canonical.com>

Will send a new fix that doesn't need this patch.

Kai-Heng

> ---
> drivers/pci/quirks.c | 1 +
> 1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
> index 44df82ede565..1feba9773b74 100644
> --- a/drivers/pci/quirks.c
> +++ b/drivers/pci/quirks.c
> @@ -5652,3 +5652,4 @@ static void pci_fixup_enable_aspm(struct pci_dev *pdev)
> }
> DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0x9a09, pci_fixup_enable_aspm);
> DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0xa0b0, pci_fixup_enable_aspm);
> +DECLARE_PCI_FIXUP_HEADER(PCI_VENDOR_ID_INTEL, 0xa0bc, pci_fixup_enable_aspm);
> -- 
> 2.27.0
> 
> 
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