lkml.org 
[lkml]   [2020]   [Apr]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH AUTOSEL 4.9 03/13] ALSA: hda: Keep the controller initialization even if no codecs found
On Fri, Apr 24, 2020 at 02:45:55PM +0200, Takashi Iwai wrote:
>On Fri, 24 Apr 2020 14:24:36 +0200,
>Sasha Levin wrote:
>>
>> From: Takashi Iwai <tiwai@suse.de>
>>
>> [ Upstream commit 9479e75fca370a5220784f7596bf598c4dad0b9b ]
>>
>> Currently, when the HD-audio controller driver doesn't detect any
>> codecs, it tries to abort the probe. But this abort happens at the
>> delayed probe, i.e. the primary probe call already returned success,
>> hence the driver is never unbound until user does so explicitly.
>> As a result, it may leave the HD-audio device in the running state
>> without the runtime PM. More badly, if the device is a HD-audio bus
>> that is tied with a GPU, GPU cannot reach to the full power down and
>> consumes unnecessarily much power.
>>
>> This patch changes the logic after no-codec situation; it continues
>> probing without the further codec initialization but keep the
>> controller driver running normally.
>>
>> BugLink: https://bugzilla.kernel.org/show_bug.cgi?id=207043
>> Tested-by: Roy Spliet <nouveau@spliet.org>
>> Link: https://lore.kernel.org/r/20200413082034.25166-5-tiwai@suse.de
>> Signed-off-by: Takashi Iwai <tiwai@suse.de>
>> Signed-off-by: Sasha Levin <sashal@kernel.org>
>
>Applying this without other commits isn't recommended, especially for
>the older branches. Maybe OK up from 4.19, but I'd avoid applying for
>the older.

Okay, I've dropped it from branches older than 4.19. Thanks!

--
Thanks,
Sasha

\
 
 \ /
  Last update: 2020-05-01 03:00    [W:0.061 / U:0.076 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site