Messages in this thread | | | Date | Wed, 20 Jul 2016 07:49:21 +0800 | From | "Yong, Jonathan" <> | Subject | Re: [PATCH v6 0/3] PCI: Precision Time Measurement support |
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On 07/20/2016 05:19, Bjorn Helgaas wrote: > On Mon, Jun 13, 2016 at 02:05:26PM -0500, Bjorn Helgaas wrote: >> This is a slightly different proposal for the PTM support Jonathan >> proposed here: >> >> http://lkml.kernel.org/r/1462956446-27361-2-git-send-email-jonathan.yong@intel.com >> >> I split this into three pieces mostly for ease in reviewing. They >> could all be squashed: >> >> - Enable PTM in root ports and switches automatically at boot >> - Enable PTM in endpoints when requested by driver >> - Add clock granularity information >> >> I have some open questions about how PTM works on Root Complex >> Integrated Endpoints and whether we should enable it automatically >> even without a driver request. And I probably left out some details >> of the clock granularity computation, so treat this as more of an RFC >> than anything. >> > > Jonathan, any comments? >
I don't have any new information on how to configure integrated endpoints.
This line: ctrl = PCI_PTM_CTRL_ENABLE | PCI_PTM_CTRL_ROOT;
should also set the responder capable bit (7.32.2): If PTM Root Capable is Set, this bit must be Set to 1b.
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