On Fri, Jun 19, 2015 at 11:52:46AM +0530, Srinidhi Kasagar wrote:
> Just like Haswell, Intel Atom Cherrytrail also do not need
> the default 10ms d3_delay imposed by the PCI specification.
>
> Signed-off-by: Srinidhi Kasagar <srinidhi.kasagar@xxxxxxxxx>
Applied with the following changelog to pci/misc for v4.2, thanks!
PCI: Remove Intel Cherrytrail D3 delays
Just like Haswell, Intel Atom Cherrytrail does not need the default 10ms
d3_delay imposed by the PCI specification.
Expand quirk_remove_d3_delay() to apply to Cherrytrail devices, so we can
ignore the 10ms delay before entering or exiting D3 suspend.
[bhelgaas: changelog, comment]
Signed-off-by: Srinidhi Kasagar <srinidhi.kasagar@xxxxxxxxx>
Signed-off-by: Bjorn Helgaas <bhelgaas@xxxxxxxxxx>
> ---
> drivers/pci/quirks.c | 11 ++++++++++-
> 1 file changed, 10 insertions(+), 1 deletion(-)
>
> diff --git a/drivers/pci/quirks.c b/drivers/pci/quirks.c
> index c6dc1dfd25d5..9f1cf197119d 100644
> --- a/drivers/pci/quirks.c
> +++ b/drivers/pci/quirks.c
> @@ -3037,7 +3037,16 @@ DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x8c26, quirk_remove_d3_delay);
> DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x8c4e, quirk_remove_d3_delay);
> DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x8c02, quirk_remove_d3_delay);
> DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x8c22, quirk_remove_d3_delay);
> -
> +/* Even few Cherrytrail devices do not need 10ms d3_delay */
> +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x2280, quirk_remove_d3_delay);
> +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x22b0, quirk_remove_d3_delay);
> +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x22b8, quirk_remove_d3_delay);
> +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x22d8, quirk_remove_d3_delay);
> +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x22dc, quirk_remove_d3_delay);
> +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x22b5, quirk_remove_d3_delay);
> +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x22b7, quirk_remove_d3_delay);
> +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x2298, quirk_remove_d3_delay);
> +DECLARE_PCI_FIXUP_FINAL(PCI_VENDOR_ID_INTEL, 0x229c, quirk_remove_d3_delay);
> /*
> * Some devices may pass our check in pci_intx_mask_supported if
> * PCI_COMMAND_INTX_DISABLE works though they actually do not properly
> --
> 1.7.9.5
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