Re: [PATCH v2 1/2] PCI: add generic quirk function for increasing D3hot delay

[Bjorn Helgaas <helgaas@kernel.org>]

On Wed, Nov 27, 2019 at 01:38:35PM +0800, Daniel Drake wrote:
> 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.
> 
> Signed-off-by: Daniel Drake <drake@endlessm.com>

I applied both of these to pci/misc for v5.6, thanks!

> ---
>  drivers/pci/quirks.c | 19 ++++++++++++-------
>  1 file changed, 12 insertions(+), 7 deletions(-)
> 
> v2: tweaked function name and message to emphasize D3hot state
> 
> diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
> index 320255e5e8f89..3b4021e719530 100644
> --- a/drivers/pci/quirks.c
> +++ b/drivers/pci/quirks.c
> @@ -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);
>  
> -- 
> 2.20.1
>