[UBUNTU (3.19) PATCH 0/4] i915 to call HDA on HDMI hotplug

David Henningsson david.henningsson at canonical.com
Wed Sep 2 11:48:59 UTC 2015



On 2015-09-02 13:44, Anthony Wong wrote:
> On 2 September 2015 at 17:23, David Henningsson
> <david.henningsson at canonical.com
> <mailto:david.henningsson at canonical.com>> wrote:
>
>
>
>     On 2015-09-01 21:38, Brad Figg wrote:
>
>         On Tue, Sep 01, 2015 at 12:04:05PM +0200, David Henningsson wrote:
>
>             This is a patch set fixing a long-standing bug for some
>             Haswell, Broadwell and most Skylake machines.
>
>             When the HDA audio controller is in D3, a hotplug event (i
>             e, HDMI or DisplayPort being plugged in) fails to wake up
>             the audio side so it never registers that something has
>             happened.
>
>             By having the i915 driver call directly into the hda driver,
>             the HDA driver is always notified that an HDMI hotplug event
>             has happened.
>
>             I've been trying to get this through upstream, but it has
>             been slower than usual due to it touching both the i915 and
>             HDA subsystems, and ideally I wanted it in there first, but
>             I don't think OEM wants to miss another SRU cycle. So this
>             is on its way in upstream, but not there yet. The patches
>             here are based on v5 of my patch set, and v4 were both
>             reviewed by Jani Nikula and Takashi Iwai.
>
>             Now, I've tested the upstream version, but I've just
>             backported this to 3.19 without any testing. I could use
>             Timo's assistance here so we coordinate testing this with
>             other i915 changes for the next SRU cycle. And I could use
>             Timo's help to make sure this applies equally to i915 and
>             i915_bpo.
>
>             BugLink:
>             https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1490895
>
>         I want to see some positive test results in the bug before I'm
>         going to
>         take this.
>
>
>     Me too. :-)
>
>     Once Timo has a finished build (and I've provided him with a version
>     that actually compiles, *ahem*), could Anthony help assign people to
>     help us test it? It would be very nice if we could have this tested
>     on more than one of (Skylake / Broadwell / Haswell).
>
>     @Anthony, if you look at the duplicates for bug 1490895 (e g,
>     1383997) I think you'll quickly understand what all of this is about
>
>
> Hi Ara,
>
> We need your team's help again to test a fix of a long-standing hdmi
> audio hotplug issue on Skylake, Broadwell and Haswell. We hope this fix
> can get in the next SRU kernel, so the test need to be done before
> Friday, do you have the resources to help with this?
>
> These are the bugs for your reference:
> Master bug: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1490895
> Dell BDW: https://bugs.launchpad.net/kittyhawk/+bug/1321986
> Dell HSW: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1383997,
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1393701\
> HP:
> https://bugs.launchpad.net/ubuntu/+source/xserver-xorg-video-ati/+bug/1379180
> Lenovo:
> https://bugs.launchpad.net/ubuntu/+source/linux-lts-utopic/+bug/1433891

And the kernel to test is the +bpo2.2 kernel at 
http://koti.kapsi.fi/~tjaalton/skl/

Please make sure you do not have any ALSA DKMS installed while testing. 
Thanks!

-- 
David Henningsson, Canonical Ltd.
https://launchpad.net/~diwic




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