[SRU][H][PATCH v2 1/1] usb: pci-quirks: disable D3cold on xhci suspend for s2idle on AMD Renoir

Werner Sembach wse at tuxedocomputers.com
Fri Jul 16 15:12:44 UTC 2021

Am 16.07.21 um 14:50 schrieb Greg Kroah-Hartman:
> On Fri, Jul 16, 2021 at 12:40:10PM +0200, Werner Sembach wrote:
>> From: Mario Limonciello <mario.limonciello at amd.com>
>> BugLink: https://bugs.launchpad.net/bugs/1936583
>> The XHCI controller is required to enter D3hot rather than D3cold for AMD
>> s2idle on this hardware generation.
>> Otherwise, the 'Controller Not Ready' (CNR) bit is not being cleared by
>> host in resume and eventually this results in xhci resume failures during
>> the s2idle wakeup.
>> Link: https://lore.kernel.org/linux-usb/1612527609-7053-1-git-send-email-Prike.Liang@amd.com/
>> Suggested-by: Prike Liang <Prike.Liang at amd.com>
>> Signed-off-by: Mario Limonciello <mario.limonciello at amd.com>
>> Cc: stable <stable at vger.kernel.org> # 5.11+
>> Link: https://lore.kernel.org/r/20210527154534.8900-1-mario.limonciello@amd.com
>> Signed-off-by: Greg Kroah-Hartman <gregkh at linuxfoundation.org>
>> (cherry picked from commit d1658268e43980c071dbffc3d894f6f6c4b6732a)
>> Signed-off-by: Werner Sembach <wse at tuxedocomputers.com>
>> ---
>>  drivers/usb/host/xhci-pci.c | 7 ++++++-
>>  drivers/usb/host/xhci.h     | 1 +
>>  2 files changed, 7 insertions(+), 1 deletion(-)
> Any reason you resent us a patch that is already in a stable release?
> And why not just use the stable kernel trees as-is?  Why attempt to
> cherry-pick random portions of them?
> thanks,
> greg k-h

I didn't add the mailing list as recipent for my last replies so here again:

I only checked the Ubuntu 5.11 tree where the patch is actually missing.

The 5.8 kernel has other issues because of outdated amdgpu, that's why we never checked the 5.4 kernel.

Testing for 5.4: often hangs on boot before display manager shows up

5.4 + amdgpu-dkms from here: https://www.amd.com/en/support/kb/release-notes/rn-amdgpu-unified-linux-21-20 : Hang on
boot issue gone, but does not suspend anymore, and has graphic glitches.

Should I add these findings to the SRU?

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