[alsa-devel] USB Type-C monitor flashes once when play a video file after unplug and re-plug the monitor

Wed Feb 12 11:03:52 CET 2020

On Wed, 12 Feb 2020 10:37:30 +0100,
<Lucien_Kao at compal.com> wrote:
> 
> Hi Takashi
> 
> Sorry to bother you again, during this period I do some experiment then issue may be fixed by my local patch, but I am not sure, however may I have your suggestion if you are available.
> I put snd_hda_codec_read and snd_hda_codec_set_power_to_all ahead then add debug log in function haswell_verify_D0 I found my changes cause cvt_nid and nid could get "power state: 1" every single time after re-plug type-c cable then playing music, you can see flash_once_fixed_messages in details. But without my patch which nid gets "power state: 0" and external type-c monitor flashes once after playing music. Assume my finding is right, do we have chance to submit code to fix issue? Thanks.

Is the issue reproduced with the latest upstream code (or at least
5.4.y stable)?
Then yeah, we need to take a deeper look.

thanks,

Takashi

> 
> With patch
> 2020-02-12T00:58:27.496016-08:00 ERR kernel: [   47.729823] @@@ cvt_nid power state: 1
> 2020-02-12T00:58:27.496024-08:00 ERR kernel: [   47.729883] @@@ nid power state: 1
> 
> Without patch
> 2020-02-12T00:55:36.795016-08:00 ERR kernel: [  125.047502] @@@ cvt_nid power state: 1
> 2020-02-12T00:55:36.795026-08:00 ERR kernel: [  125.047565] @@@ nid power state: 0
> 
> -----Original Message-----
> From: Takashi Iwai <tiwai at suse.de> 
> Sent: Wednesday, January 8, 2020 2:18 PM
> To: Kao. Lucien (TPE) <Lucien_Kao at compal.com>
> Cc: nathan.d.ciobanu at linux.intel.com; Cheng. AJ (TPE) <AJ_Cheng at compal.com>; intel-gfx at lists.freedesktop.org; alsa-devel at alsa-project.org; Wang. CindyXT (TPE) <CindyXT_Wang at compal.com>; Ye. Nelson (TPE) <Nelson_Ye at compal.com>; Yap. Shane (TPE) <Shane_Yap at compal.com>; Tseng. Evan (TPE) <Evan_Tseng at compal.com>
> Subject: Re: [alsa-devel] USB Type-C monitor flashes once when play a video file after unplug and re-plug the monitor
> 
> On Wed, 08 Jan 2020 04:07:17 +0100,
> <Lucien_Kao at compal.com> wrote:
> > 
> > Hi Takashi
> > 
> > Is the attachment what you suspect? That merged to our kernel v4.19 already, have any suggestions? Thanks.
> 
> Then I have no concrete idea.  It might be some other changes in HDMI codec driver or it might be a fix in i915 graphics side, or even thunderbolt or whatever, too...
> 
> Takashi
> 
> > 
> > -----Original Message-----
> > From: Takashi Iwai <tiwai at suse.de>
> > Sent: Wednesday, January 8, 2020 2:57 AM
> > To: Nathan Ciobanu <nathan.d.ciobanu at linux.intel.com>
> > Cc: Kao. Lucien (TPE) <Lucien_Kao at compal.com>; Cheng. AJ (TPE) 
> > <AJ_Cheng at compal.com>; intel-gfx at lists.freedesktop.org; 
> > alsa-devel at alsa-project.org; Wang. CindyXT (TPE) 
> > <CindyXT_Wang at compal.com>; Ye. Nelson (TPE) <Nelson_Ye at compal.com>; 
> > Yap. Shane (TPE) <Shane_Yap at compal.com>; Tseng. Evan (TPE) 
> > <Evan_Tseng at compal.com>
> > Subject: Re: [alsa-devel] USB Type-C monitor flashes once when play a 
> > video file after unplug and re-plug the monitor
> > 
> > On Tue, 07 Jan 2020 18:24:57 +0100,
> > Nathan Ciobanu wrote:
> > > 
> > > On Mon, Jan 06, 2020 at 08:08:04AM +0000, Lucien_Kao at compal.com wrote:
> > > > Hi Takashi
> > > > 
> > > > We verified on Ubuntu 19.10 with kernel 5.4.0.0-050400-generic (please refer to attachment), the result is positive which symptom doesn't happen anymore once I played music or video sound output through Dell S2718D Type-C monitor. It seems had some fix in latest kernel.
> > > 
> > > Takashi, can you point to the patch series you suspect may have fixed this issue? 
> > 
> > The first suspect would be
> > 2756d9143aa517b97961e85412882b8ce31371a6
> >     ALSA: hda - Fix intermittent CORB/RIRB stall on Intel chips
> > 
> > Takashi
> > 
> > > 
> > > Thanks,
> > > Nathan
> > > > 
> > > > Thanks.
> > > > 
> > > > 
> > > > -----Original Message-----
> > > > From: Takashi Iwai <tiwai at suse.de>
> > > > Sent: Friday, January 3, 2020 5:16 PM
> > > > To: Cheng. AJ (TPE) <AJ_Cheng at compal.com>
> > > > Cc: intel-gfx at lists.freedesktop.org; alsa-devel at alsa-project.org; 
> > > > nathan.d.ciobanu at linux.intel.com; Wang. CindyXT (TPE) 
> > > > <CindyXT_Wang at compal.com>; Ye. Nelson (TPE) 
> > > > <Nelson_Ye at compal.com>; Yap. Shane (TPE) <Shane_Yap at compal.com>; 
> > > > Kao. Lucien (TPE) <Lucien_Kao at compal.com>; Tseng. Evan (TPE) 
> > > > <Evan_Tseng at compal.com>
> > > > Subject: Re: [alsa-devel] USB Type-C monitor flashes once when 
> > > > play a video file after unplug and re-plug the monitor
> > > > 
> > > > On Fri, 03 Jan 2020 02:57:03 +0100, <AJ_Cheng at compal.com> wrote:
> > > > > 
> > > > > Hi Sirs,
> > > > >         Here is chromebook SW team from Compal.
> > > > > As the mail title, we hit issue that the external monitor will flash once when play video after hot pluging.
> > > > > We can reproduce not only on chromebook but also ubuntu 16.04.
> > > > > There has higher failure rate with Dell Solomon dock and Dell S2718D monitor.
> > > > > 
> > > > > We found adding the delay in "sound/pci/hda/patch_hdmi.c " can 
> > > > > fix this issue.(as the attachment) May need your help to review and advice. Thanks.
> > > > > 
> > > > > Here is the issue number in gitlab for more detail.
> > > > > https://gitlab.freedesktop.org/drm/intel/issues/318
> > > > 
> > > > Could you check whether it still happens with the latest upstream kernel, at least 5.4.y, if it wasn't tested yet?
> > > > 
> > > > I don't want to put a long delay just because of random reason unless it's really mandatory.  I'm wondering whether the recent write-sync change improves the situation, so let's check the recent code.
> > > > 
> > > > 
> > > > thanks,
> > > > 
> > > > Takashi
> > > > 
> > > > > 
> > > > > 
> > > > > 
> > > > > AJ Cheng
> > > > > NID/NID1
> > > > > e-mail: AJ_Cheng at compal.com<mailto:AJ_Cheng at compal.com>
> > > > > Tel:  +886-2-8797-8599 ext. 17561 Mobile : +886-932827829 COMPAL 
> > > > > Electronics, Inc.
> > > > > 
> > > > > [2 flash_once.diff <application/octet-stream (base64)>]
> > > > > 
> > > > > _______________________________________________
> > > > > Alsa-devel mailing list
> > > > > Alsa-devel at alsa-project.org
> > > > > https://mailman.alsa-project.org/mailman/listinfo/alsa-devel
> > > 
> > > 
> > 
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> > 
> > [1.2  <text/plain; us-ascii (base64)>]
> > 
> > [2 0001-UPSTREAM-ALSA-hda-Fix-intermittent-CORB-RIRB-stall-o.patch 
> > <application/octet-stream (base64)>]
> > 
> 
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> This message may contain information which is private, privileged or
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> If you are not the intended recipient of this message, please notify the
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> 
> [1.2  <text/plain; us-ascii (base64)>]
> 
> [2 flash_once_fixed_messages <application/octet-stream (base64)>]
> 
> [3 flash_once_present_messages <application/octet-stream (base64)>]
> 
> [4 flash_once.diff <application/octet-stream (base64)>]
> 