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From: Alex Deucher <alexdeucher@gmail.com>
To: Ilia Mirkin <imirkin@alum.mit.edu>
Cc: Peter Wu <peter@lekensteyn.nl>,
	Linux PCI <linux-pci@vger.kernel.org>,
	"dri-devel@lists.freedesktop.org"
	<dri-devel@lists.freedesktop.org>,
	Bjorn Helgaas <helgaas@kernel.org>,
	"nouveau@lists.freedesktop.org" <nouveau@lists.freedesktop.org>,
	Dave Airlie <airlied@redhat.com>,
	Mika Westerberg <mika.westerberg@linux.intel.com>
Subject: Re: [Nouveau] [PATCH v3 0/4] nouveau RPM fixes for Optimus (final)
Date: Fri, 15 Jul 2016 12:27:57 -0400	[thread overview]
Message-ID: <CADnq5_OBjHXO4sfakK0ZJPbHPrMACqdU7J-j9sHLjod0QcuzcA@mail.gmail.com> (raw)
In-Reply-To: <CAKb7UvisjzPs_K1SNdDb7aZjxGQL4AOs05R8CX2xjU4uRpfcfA@mail.gmail.com>

On Fri, Jul 15, 2016 at 12:10 PM, Ilia Mirkin <imirkin@alum.mit.edu> wrote:
> On Fri, Jul 15, 2016 at 9:12 AM, Peter Wu <peter@lekensteyn.nl> wrote:
>> Hi,
>>
>> Here are two patches to fix an issue reported on kernel bugzilla (infinite loop
>> due to unchecked function) and a more important fix to fix hanging Optimus
>> machines when runtime PM is enabled (with pm/pci patches).
>>
>> These are the final patches targeting v4.8. Changes compared to v2[1]:
>> collected R-b from Hans and Mika and fixed a minor comment style issue.
>>
>> I recommend it to be merged before the pci/pm patches[2], otherwise there is a
>> window where newer Nvidia Optimus laptops might fail to runtime resume and/or
>> lock up.  Once the pci/pm branch is merged I will propose another patch to
>> improve reliability[3].
>>
>> Known issue with patch 4: when a Nvidia HDMI audio function is present, the
>> bridge will not suspend and hence the Nvidia card will still be powered. Fixing
>
> That's basically all optimus gpu's, right? Anything GT21x+ has a HDMI
> audio subfunction, and prior to that, the nvidia gpu tended to be the
> only gpu, or hard-muxed.

I'd imagine there is a strap on the asic so the audio function is only
enabled if there is a connector actually wired to the dGPU.  It
doesn't make much sense to expose audio if there is no way to use it.

Alex

  reply	other threads:[~2016-07-15 16:27 UTC|newest]

Thread overview: 20+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2016-07-15 13:12 [PATCH v3 0/4] nouveau RPM fixes for Optimus (final) Peter Wu
2016-07-15 13:12 ` Peter Wu
2016-07-15 13:12 ` [PATCH v3 4/4] drm/nouveau/acpi: fix lockup with PCIe runtime PM Peter Wu
2016-07-15 16:10 ` [Nouveau] [PATCH v3 0/4] nouveau RPM fixes for Optimus (final) Ilia Mirkin
2016-07-15 16:10   ` Ilia Mirkin
2016-07-15 16:27   ` Alex Deucher [this message]
2016-07-15 16:31     ` [Nouveau] " Ilia Mirkin
2016-07-15 16:40       ` Alex Deucher
2016-07-15 16:40         ` Alex Deucher
2016-07-15 16:42         ` Ilia Mirkin
2016-07-15 16:42           ` Ilia Mirkin
2016-07-15 16:36   ` [Nouveau] " Peter Wu
2016-07-15 16:41     ` Ilia Mirkin
2016-07-15 16:54       ` Peter Wu
2016-07-15 16:54         ` Peter Wu
2016-07-15 23:24         ` Peter Wu
     [not found] ` <20160715131218.2416-1-peter-VTkQYDcBqhK7DlmcbJSQ7g@public.gmane.org>
2016-07-15 13:12   ` [PATCH v3 1/4] drm/nouveau/acpi: ensure matching ACPI handle and supported functions Peter Wu
2016-07-15 13:12   ` [PATCH v3 2/4] drm/nouveau/acpi: return supported DSM functions Peter Wu
2016-07-15 13:12   ` [PATCH v3 3/4] drm/nouveau/acpi: check for function 0x1B before using it Peter Wu
2016-07-27 12:02   ` [PATCH v3 0/4] nouveau RPM fixes for Optimus (final) Peter Wu

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