[alsa-devel] [PATCH 0/1] ALSA: hda - Use acpi_dev_present()

[Pierre-Louis Bossart]

On 02/21/2016 02:17 AM, Takashi Iwai wrote:
> On Sat, 20 Feb 2016 23:47:24 +0100,
> Lukas Wunner wrote:
>>
>> Hi Takashi,
>>
>> On Fri, Jan 15, 2016 at 06:58:19AM +0100, Takashi Iwai wrote:
>>> On Thu, 14 Jan 2016 22:05:03 +0100, Lukas Wunner wrote:
>>>> Hi Takashi,
>>>>
>>>> the acpi_dev_present() API has now landed in Linus' tree.
>>>> Thus, after Linus' tree gets merged back into yours,
>>>> it would be possible to use the API in the Thinkpad hda drivers
>>>> as per the following patch.
>>>>
>>>> I've also pushed it to GitHub in case anyone prefers
>>>> perusing it in a browser:
>>>> https://github.com/l1k/linux/commit/a1473d726b57eaf97c4de8812c5967603068e261
>>>>
>>>> An ack for this patch was kindly provided by Hui Wang with:
>>>> Message-ID: <5653C291.9090607 at canonical.com>
>>>> http://mailman.alsa-project.org/pipermail/alsa-devel/2015-November/100962.html
>>>
>>> A back merge is ugly and I'd like to avoid it.
>>> This is no urgent fix but rather a cleanup, right?  If so, I'd
>>> postpone this to 4.6.
>>
>> I've noticed this patch isn't in one of your trees, so it looks
>> like it's not queued for 4.6 yet. If there are objections against
>> it please let me know. If there aren't, I'd like to gently remind
>> of the patch's existence.
> 
> Sorry for the delay, it's merged now.
 
heads-up: we've identified that the ACPI subsystem reports devices as present even if they are explicitly disabled in the BIOS _STA routine. we have a couple of WIP patches to work around this issue that is blocking for some CHT-T devices, and they pretty much amount to a revert and addition of an explicit presence test
-Pierre