From: Mathias Nyman <mathias.nyman@linux.intel.com>
To: <gregkh@linuxfoundation.org>
Cc: <linux-usb@vger.kernel.org>,
Basavaraj Natikar <Basavaraj.Natikar@amd.com>,
Mario Limonciello <mario.limonciello@amd.com>,
Mathias Nyman <mathias.nyman@linux.intel.com>
Subject: [PATCH 15/19] xhci: Enable RPM on controllers that support low-power states
Date: Thu, 19 Oct 2023 13:29:20 +0300 [thread overview]
Message-ID: <20231019102924.2797346-16-mathias.nyman@linux.intel.com> (raw)
In-Reply-To: <20231019102924.2797346-1-mathias.nyman@linux.intel.com>
From: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Use the low-power states of the underlying platform to enable runtime PM.
If the platform doesn't support runtime D3, then enabling default RPM will
result in the controller malfunctioning, as in the case of hotplug devices
not being detected because of a failed interrupt generation.
Cc: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Basavaraj Natikar <Basavaraj.Natikar@amd.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
---
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 bde43cef8846..95ed9404f6f8 100644
--- a/drivers/usb/host/xhci-pci.c
+++ b/drivers/usb/host/xhci-pci.c
@@ -695,7 +695,9 @@ static int xhci_pci_probe(struct pci_dev *dev, const struct pci_device_id *id)
/* USB-2 and USB-3 roothubs initialized, allow runtime pm suspend */
pm_runtime_put_noidle(&dev->dev);
- if (xhci->quirks & XHCI_DEFAULT_PM_RUNTIME_ALLOW)
+ if (pci_choose_state(dev, PMSG_SUSPEND) == PCI_D0)
+ pm_runtime_forbid(&dev->dev);
+ else if (xhci->quirks & XHCI_DEFAULT_PM_RUNTIME_ALLOW)
pm_runtime_allow(&dev->dev);
dma_set_max_seg_size(&dev->dev, UINT_MAX);
--
2.25.1
next prev parent reply other threads:[~2023-10-19 10:28 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-10-19 10:29 [PATCH 00/19] xhci features for usb-next Mathias Nyman
2023-10-19 10:29 ` [PATCH 01/19] xhci: pass port structure to tracing instead of port number Mathias Nyman
2023-10-19 10:29 ` [PATCH 02/19] xhci: Add busnumber to port tracing Mathias Nyman
2023-10-19 10:29 ` [PATCH 03/19] xhci: expand next_trb() helper to support more ring types Mathias Nyman
2023-10-19 10:29 ` [PATCH 04/19] xhci: Set DESI bits in ERDP register correctly Mathias Nyman
2023-10-19 10:29 ` [PATCH 05/19] xhci: Use more than one Event Ring segment Mathias Nyman
2023-10-19 10:29 ` [PATCH 06/19] xhci: Adjust segment numbers after ring expansion Mathias Nyman
2023-10-19 10:29 ` [PATCH 07/19] xhci: Update last segment pointer after Event Ring expansion Mathias Nyman
2023-10-19 10:29 ` [PATCH 08/19] xhci: Expose segment numbers in debugfs Mathias Nyman
2023-10-19 10:29 ` [PATCH 09/19] xhci: Clean up ERST_PTR_MASK inversion Mathias Nyman
2023-10-19 10:29 ` [PATCH 10/19] xhci: Clean up stale comment on ERST_SIZE macro Mathias Nyman
2023-10-19 10:29 ` [PATCH 11/19] xhci: Clean up xhci_{alloc,free}_erst() declarations Mathias Nyman
2023-10-19 10:29 ` [PATCH 12/19] xhci: simplify event ring dequeue tracking for transfer events Mathias Nyman
2023-10-19 10:29 ` [PATCH 13/19] xhci: Simplify event ring dequeue pointer update for port change events Mathias Nyman
2023-10-19 10:29 ` [PATCH 14/19] xhci: Loosen RPM as default policy to cover for AMD xHC 1.1 Mathias Nyman
2023-10-19 10:29 ` Mathias Nyman [this message]
2023-10-19 10:29 ` [PATCH 16/19] xhci: split free interrupter into separate remove and free parts Mathias Nyman
2023-10-19 10:29 ` [PATCH 17/19] usb: xhci: Implement xhci_handshake_check_state() helper Mathias Nyman
2023-10-19 10:29 ` [PATCH 18/19] usb: host: xhci-plat: fix possible kernel oops while resuming Mathias Nyman
2023-10-19 10:29 ` [PATCH 19/19] usb: host: xhci: Avoid XHCI resume delay if SSUSB device is not present Mathias Nyman
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20231019102924.2797346-16-mathias.nyman@linux.intel.com \
--to=mathias.nyman@linux.intel.com \
--cc=Basavaraj.Natikar@amd.com \
--cc=gregkh@linuxfoundation.org \
--cc=linux-usb@vger.kernel.org \
--cc=mario.limonciello@amd.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.