linux-kernel - Re: [PATCH] usb: xhci: Workaround for runpm issue on AMD xHC

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Message-ID: <141b6b13-00ca-c941-e315-6b2fe62e6515@amd.com>
Date:   Sun, 19 Feb 2023 21:14:47 -0600
From:   Mario Limonciello <mario.limonciello@....com>
To:     AceLan Kao <acelan.kao@...onical.com>,
        Mathias Nyman <mathias.nyman@...el.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
        Shyam Sundar S K <Shyam-sundar.S-k@....com>,
        "Tsao, Anson" <anson.tsao@....com>,
        "Gong, Richard" <Richard.Gong@....com>,
        Basavaraj Natikar <Basavaraj.Natikar@....com>,
        "Oakes, Gregory" <Gregory.Oakes@....com>
Subject: Re: [PATCH] usb: xhci: Workaround for runpm issue on AMD xHC

+ a bunch of AMD guys

Please don't submit quirks for AMD systems without talking to AMD about 
if they make sense.

On 2/15/23 01:58, AceLan Kao wrote:
> From: "Chia-Lin Kao (AceLan)" <acelan.kao@...onical.com>
> 
> When the xHC host is runtime suspended, the device connects to it will be
> disconnected while trying to use it.
> The quirk in commit 2a632815683d ("usb: xhci: Workaround for S3 issue on
> AMD SNPS 3.0 xHC") also works for this issue, so added its ID to the
> quirk, too.
> 
> 05:00.0 USB controller [0c03]: Advanced Micro Devices, Inc. [AMD] Device [1022:1505] (prog-if 30 [XHCI])
>          Subsystem: Dell Device [1028:0c3f]
>          Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR- FastB2B- DisINTx+
>          Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
>          Latency: 0, Cache Line Size: 64 bytes
>          Interrupt: pin A routed to IRQ 60
>          IOMMU group: 21
>          Region 0: Memory at c0000000 (64-bit, non-prefetchable) [size=1M]
>          Capabilities: <access denied>
>          Kernel driver in use: xhci_hcd
>          Kernel modules: xhci_pci
> 
> [   20.769275] xhci_hcd 0000:05:00.0: xHCI host not responding to stop endpoint command
> [   20.771429] xhci_hcd 0000:05:00.0: xHCI host controller not responding, assume dead
> [   20.771444] xhci_hcd 0000:05:00.0: HC died; cleaning up
> [   20.771733] usb 5-1: USB disconnect, device number 2
> 
> Cc: stable@...r.kernel.org #v4.19+
> Signed-off-by: Chia-Lin Kao (AceLan) <acelan.kao@...onical.com>

Is this system that you're finding this bug already launched?  This 
looks like a BIOS bug.

If it's not launched we should fix it from BIOS, reach out to AMD off 
list to talk about it.

> ---
>   drivers/usb/host/xhci-pci.c | 4 +++-
>   1 file changed, 3 insertions(+), 1 deletion(-)
> 
> diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
> index fb988e4ea924..b8f6843a8cd1 100644
> --- a/drivers/usb/host/xhci-pci.c
> +++ b/drivers/usb/host/xhci-pci.c
> @@ -177,7 +177,9 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
>   	    (pdev->device == 0x15e0 || pdev->device == 0x15e1))
>   		xhci->quirks |= XHCI_SNPS_BROKEN_SUSPEND;
>   
> -	if (pdev->vendor == PCI_VENDOR_ID_AMD && pdev->device == 0x15e5) {
> +	if (pdev->vendor == PCI_VENDOR_ID_AMD &&
> +		(pdev->device == 0x15e5 ||
> +		 pdev->device == 0x1505)) {
>   		xhci->quirks |= XHCI_DISABLE_SPARSE;
>   		xhci->quirks |= XHCI_RESET_ON_RESUME;
>   	}