From: bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ@public.gmane.org
To: nouveau-PD4FTy7X32lNgt0PjOBp9y5qC8QIuHrW@public.gmane.org
Subject: [Bug 75985] [NVC1] HDMI audio device only visible after rescan
Date: Thu, 28 Sep 2017 12:33:51 +0000 [thread overview]
Message-ID: <bug-75985-8800-G2ZpNukYgF@http.bugs.freedesktop.org/> (raw)
In-Reply-To: <bug-75985-8800-V0hAGp6uBxMKqLRl/0Ahz6D7qz1kEfGD2LY78lusg7I@public.gmane.org/>
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https://bugs.freedesktop.org/show_bug.cgi?id=75985
Maik Freudenberg <hhfeuer-Mmb7MZpHnFY@public.gmane.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |hhfeuer-Mmb7MZpHnFY@public.gmane.org
--- Comment #13 from Maik Freudenberg <hhfeuer-Mmb7MZpHnFY@public.gmane.org> ---
(In reply to Peter Wu from comment #12)
> On my laptop that area is somewhere after the AER
> capability and is all zeroes, it does not seem to make sense.
Why do you mention AER capability in this context? Are associated registers
normally the highest used in PCI config space? Could you give a hint on that?
Seen from a hardware perspective, this could make sense. Since the audio is
another PCI function not always needed, it sure has some enable pin on the chip
so it can be toggled or disabled by some external circuitry, vendor specific.
And some (reserved) gpio pin is used to make it switchable through software. So
maybe the config space >=0x400 being gpio space?
Wild guess, of course.
Interesting would be if after write, this can be read or returns zero again?
What about desktop cards, do they also have this register? Is this always set
then?
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next prev parent reply other threads:[~2017-09-28 12:33 UTC|newest]
Thread overview: 123+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-03-10 15:56 [Bug 75985] New: HDMI audio device only visible after rescan bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ
[not found] ` <bug-75985-8800-V0hAGp6uBxMKqLRl/0Ahz6D7qz1kEfGD2LY78lusg7I@public.gmane.org/>
2014-03-10 16:00 ` [Bug 75985] [NVC1] " bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ
2014-03-10 16:15 ` bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ
2014-03-10 23:14 ` bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ
2014-03-10 23:14 ` bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ
2014-09-15 23:52 ` bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ
2014-09-16 6:33 ` bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ
2016-07-16 17:20 ` bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ
2016-11-05 22:30 ` bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ
2016-12-22 23:04 ` bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ
2016-12-22 23:05 ` bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ
2017-09-26 10:04 ` bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ
2017-09-26 22:50 ` bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ
2017-09-28 12:33 ` bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ [this message]
2017-09-30 2:45 ` bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ
2017-10-04 21:39 ` bugzilla-daemon-CC+yJ3UmIYqDUpFQwHEjaQ
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