Re: Regression: Inoperative bluetooth, Intel chipset, mainline kernel 6.6.2+

[Basavaraj Natikar <bnatikar@amd.com>]

On 12/3/2023 2:08 PM, Greg KH wrote:
> On Sun, Dec 03, 2023 at 03:32:52AM -0500, Kris Karas (Bug Reporting) wrote:
>> Greg KH wrote:
>>> Thanks for testing, any chance you can try 6.6.4-rc1?  Or wait a few
>>> hours for me to release 6.6.4 if you don't want to mess with a -rc
>>> release.
>> As I mentioned to Greg off-list (to save wasting other peoples' bandwidth),
>> I couldn't find 6.6.4-rc1.  Looking in wrong git tree?  But 6.6.4 is now
>> out, which I have tested and am running at the moment, albeit with the
>> problem commit from 6.6.2 backed out.
>>
>> There is no change with respect to this bug.  The problematic patch
>> introduced in 6.6.2 was neither reverted nor amended.  The "opcode 0x0c03
>> failed" lines to the kernel log continue to be present.
>>
>>> Also, is this showing up in 6.7-rc3?  If so, that would be a big help in
>>> tracking this down.
>> The bug shows up in 6.7-rc3 as well, exactly as it does here in 6.6.2+ and
>> in 6.1.63+.  The problematic patch bisected earlier appears identically (and
>> seems to have been introduced simultaneously) in these recent releases.
> Ok, in a way, this is good as that means I haven't missed a fix, but bad
> in that this does affect everyone more.
>
> So let's start over, you found the offending commit, and nothing has
> fixed it, so what do we do?  xhci/amd developers, any ideas?

Can we enable RPM on specific controllers for AMD xHC 1.1
instead to cover all AMD xHC 1.1? 

Please find below the proposed changes and let me know if it is OK?
 
Author: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Date:   Sun Dec 3 18:28:27 2023 +0530

    xhci: Remove RPM as default policy to cover AMD xHC 1.1

    xHC 1.1 runtime PM as default policy causes issues on few AMD controllers.
    Hence remove RPM as default policy to cover AMD xHC 1.1 and add only
    AMD USB host controller (1022:43f7) which has RPM support. 

    Fixes: 4baf12181509 ("xhci: Loosen RPM as default policy to cover for AMD xHC 1.1")
    Link: https://lore.kernel.org/all/2023120329-length-strum-9ee1@gregkh
    Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>

diff --git a/drivers/usb/host/xhci-pci.c b/drivers/usb/host/xhci-pci.c
index 95ed9404f6f8..7ffd6b8227cc 100644
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -535,7 +535,7 @@ static void xhci_pci_quirks(struct device *dev, struct xhci_hcd *xhci)
        /* xHC spec requires PCI devices to support D3hot and D3cold */
        if (xhci->hci_version >= 0x120)
                xhci->quirks |= XHCI_DEFAULT_PM_RUNTIME_ALLOW;
-       else if (pdev->vendor == PCI_VENDOR_ID_AMD && xhci->hci_version >= 0x110)
+       else if (pdev->vendor == PCI_VENDOR_ID_AMD && pdev->vendor == 0x43f7)
                xhci->quirks |= XHCI_DEFAULT_PM_RUNTIME_ALLOW;

        if (xhci->quirks & XHCI_RESET_ON_RESUME)

Thanks,
--
Basavaraj

>
> thanks,
>
> greg k-h