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From: Gerd Hoffmann <kraxel@redhat.com>
To: Sebastian Bauer <mail@sebastianbauer.info>
Cc: qemu-devel@nongnu.org
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	[thread overview]
Message-ID: <50927722.7040007@redhat.com> (raw)
In-Reply-To: <2c7709acb10525c7c9365fabe1216e7a@sebastianbauer.info>


  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

  reply	other threads:[~2012-11-01 13:20 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-10-26  8:29 [Qemu-devel] [PATCH 0/2] xhci: Better spec conforming behaviour Sebastian Bauer
2012-10-26  8:29 ` [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 Sebastian Bauer
2012-10-26 12:00   ` Gerd Hoffmann
2012-10-26 15:10     ` Sebastian Bauer
2012-11-01 13:20       ` Gerd Hoffmann [this message]
2012-10-26  8:29 ` [Qemu-devel] [PATCH 2/2] Respond a set address command with CC_PARAMETER_ERROR, if the speed field of the input context is not valid Sebastian Bauer
2012-10-26 12:05   ` Gerd Hoffmann
2012-10-26 11:53 ` [Qemu-devel] [PATCH 0/2] xhci: Better spec conforming behaviour Gerd Hoffmann

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