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

Ara Pulido ara.pulido at canonical.com
Wed Sep 2 11:50:25 UTC 2015



On 02/09/15 13:48, David Henningsson wrote:
> 
> 
> 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!
> 

What's the scope of the testing?

Just testing HDMI and DP hotplug on a SKL, a BDW and a HSW system? What
kind of regression testing should we doing?

Thanks!
Ara.




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