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PCI: Add generic quirk for increasing D3hot delay 

[ Upstream commit 62fe23df06 ]

Separate the D3 delay increase functionality out of quirk_radeon_pm() into
its own function so that it can be shared with other quirks, including the
AMD Ryzen XHCI quirk that will be introduced in a followup commit.

Tweak the function name and message to indicate more clearly that the delay
relates to a D3hot-to-D0 transition.

Link: https://lore.kernel.org/r/20191127053836.31624-1-drake@endlessm.com
Signed-off-by: Daniel Drake <drake@endlessm.com>
Signed-off-by: Bjorn Helgaas <bhelgaas@google.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
5.4-rM2-2.2.x-imx-squashed
Daniel Drake 2019-11-27 13:38:35 +08:00 committed by Greg Kroah-Hartman
parent 1e7b1684de
commit 5700b8073f
1 changed files with 12 additions and 7 deletions
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19
drivers/pci/quirks.c
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@ -1871,16 +1871,21 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x2609, quirk_intel_pcie_pm);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x260a, quirk_intel_pcie_pm);
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x260b, quirk_intel_pcie_pm);
static void quirk_d3hot_delay(struct pci_dev *dev, unsigned int delay)
{
if (dev->d3_delay >= delay)
return;
dev->d3_delay = delay;
pci_info(dev, "extending delay after power-on from D3hot to %d msec\n",
dev->d3_delay);
}
static void quirk_radeon_pm(struct pci_dev *dev)
{
if (dev->subsystem_vendor == PCI_VENDOR_ID_APPLE &&
dev->subsystem_device == 0x00e2) {
if (dev->d3_delay < 20) {
dev->d3_delay = 20;
pci_info(dev, "extending delay after power-on from D3 to %d msec\n",
dev->d3_delay);
}
}
dev->subsystem_device == 0x00e2)
quirk_d3hot_delay(dev, 20);
}
DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_ATI, 0x6741, quirk_radeon_pm);