<pre> 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. 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@suse.de> Sent: Wednesday, January 8, 2020 2:18 PM To: Kao. Lucien (TPE) <Lucien_Kao@compal.com> Cc: nathan.d.ciobanu@linux.intel.com; Cheng. AJ (TPE) <AJ_Cheng@compal.com>; intel-gfx@lists.freedesktop.org; alsa-devel@alsa-project.org; Wang. CindyXT (TPE) <CindyXT_Wang@compal.com>; Ye. Nelson (TPE) <Nelson_Ye@compal.com>; Yap. Shane (TPE) <Shane_Yap@compal.com>; Tseng. Evan (TPE) <Evan_Tseng@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@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@suse.de> > Sent: Wednesday, January 8, 2020 2:57 AM > To: Nathan Ciobanu <nathan.d.ciobanu@linux.intel.com> > Cc: Kao. Lucien (TPE) <Lucien_Kao@compal.com>; Cheng. AJ (TPE) > <AJ_Cheng@compal.com>; intel-gfx@lists.freedesktop.org; > alsa-devel@alsa-project.org; Wang. CindyXT (TPE) > <CindyXT_Wang@compal.com>; Ye. Nelson (TPE) <Nelson_Ye@compal.com>; > Yap. Shane (TPE) <Shane_Yap@compal.com>; Tseng. Evan (TPE) > <Evan_Tseng@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@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@suse.de> > > > Sent: Friday, January 3, 2020 5:16 PM > > > To: Cheng. AJ (TPE) <AJ_Cheng@compal.com> > > > Cc: intel-gfx@lists.freedesktop.org; alsa-devel@alsa-project.org; > > > nathan.d.ciobanu@linux.intel.com; Wang. CindyXT (TPE) > > > <CindyXT_Wang@compal.com>; Ye. Nelson (TPE) > > > <Nelson_Ye@compal.com>; Yap. Shane (TPE) <Shane_Yap@compal.com>; > > > Kao. Lucien (TPE) <Lucien_Kao@compal.com>; Tseng. Evan (TPE) > > > <Evan_Tseng@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@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@compal.com<mailto:AJ_Cheng@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@alsa-project.org > > > > https://mailman.alsa-project.org/mailman/listinfo/alsa-devel > > > > > > ====================================================================== > ======== > ================================= > This message may contain information which is private, privileged or > confidential of Compal Electronics, Inc. > If you are not the intended recipient of this message, please notify > the sender and destroy/delete the message. > Any review, retransmission, dissemination or other use of, or taking > of any action in reliance upon this information, by persons or > entities other than the intended recipient is prohibited. > ====================================================================== > ======== > ================================= > > > [1.2 <text/plain; us-ascii (base64)>] > > [2 0001-UPSTREAM-ALSA-hda-Fix-intermittent-CORB-RIRB-stall-o.patch > <application/octet-stream (base64)>] > </pre>=============================================================================================================== This message may contain information which is private, privileged or confidential of Compal Electronics, Inc. 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