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Re: [Qemu-devel] [PATCH 1/2] When the XHCI host controller is switched t
From: |
Gerd Hoffmann |
Subject: |
Re: [Qemu-devel] [PATCH 1/2] When the XHCI host controller is switched to the running mode, set the ccs bit for each port, to which a device is already attached. |
Date: |
Thu, 01 Nov 2012 14:20:34 +0100 |
User-agent: |
Mozilla/5.0 (X11; Linux x86_64; rv:10.0.10) Gecko/20121026 Thunderbird/10.0.10 |
Hi,
[ sorry for the delay, was busy with other stuff ]
> I'm not sure about that. According to the spec, when the hc is set to
> running mode (p.70)
>
> "At this point, the host controller is up and running and the Root Hub
> ports (5.4.8) will begin reporting device
> connects"
I understand "report" as "stick events into the event ring".
So I think the portsc register should be updated no matter what, and
when xhci is running additionally queue an event.
> However, does
> this commit also ensure that the status port change event is generated
> when the hc is switched to running mode and there were already some
> devices present?
No. I don't think the controller is supposed to do that.
cheers,
Gerd
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- Re: [Qemu-devel] [PATCH 1/2] When the XHCI host controller is switched to the running mode, set the ccs bit for each port, to which a device is already attached.,
Gerd Hoffmann <=