Bug 114981

Summary:	HDMI muted on radeon card
Product:	Drivers	Reporter:	Lorenzo Bona (lorenz.bona)
Component:	Sound(ALSA)	Assignee:	platform_x86_64 (platform_x86_64)
Status:	NEW ---
Severity:	normal	CC:	dex, francois.jacques, superquad.vortex2, szg00000, tiwai
Priority:	P1
Hardware:	x86-64
OS:	Linux
Kernel Version:	4.6-git	Subsystem:
Regression:	No	Bisected commit-id:
Attachments:	Output of xrandr --prop git bisect log

Description Lorenzo Bona 2016-03-20 13:55:54 UTC

Hi,
between this 2 git commits:

9ea446352047d8350553250db51da2c73a610688 - good
021f163d696caed5a336fa1569efdd22216da340 - bad

audio from HDMI got broken.
I can't hear any sound from my monitor.

My monitor is plugged, over HDMI, to a R7-265 radeon card (pitcairn).

On the bad commit dmesg doesn't show any warning/error while booting up.
I'm using pulseaudio from debian sid.

Cheers

Comment 1 Daniel Exner 2016-05-01 20:51:39 UTC

Created attachment 214871 [details]
Output of xrandr --prop

Comment 2 Daniel Exner 2016-05-01 20:55:43 UTC

I can confirm this for R7 270X (also pitcairn) connected via DisplayPort.

See attached output of "xrandr --prop" after doing:

xrandr --output DisplayPort-0 --set audio on

Monitor flickers and comes back but no sound.

Also I found this in dmesg (not sure its related):

[drm:radeon_dp_link_train [radeon]] *ERROR* displayport link status failed
[drm:radeon_dp_link_train [radeon]] *ERROR* channel eq failed

The monitor got a menu item to toggle DP version 1.2, but that doesn't make any difference, except another error in dmesg:

[drm:radeon_crtc_page_flip [radeon]] *ERROR* failed to get vblank before flip

Comment 3 Daniel Exner 2016-05-02 21:34:07 UTC

Created attachment 214981 [details]
git bisect log

I went as far to bisect this down to:

commit 739ffee97ed550a2899a925ed3f260fa1e8fa955
Author: Subhransu S. Prusty <subhransu.s.prusty@intel.com>
Date:   Fri Mar 4 19:59:49 2016 +0530

    ALSA: hda - Add hdmi chmap verb programming ops to chmap object

Comment 4 Raymond 2016-05-11 13:00:46 UTC

https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/pci/hda/patch_hdmi.c?id=89250f84644676c1ed6a09acef1033e14596a402


are your codec rev 3 ?


https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/pci/hda/patch_hdmi.c?id=44fde3b89ba1e154b3cec7d711703fff53852983

Comment 5 Daniel Exner 2016-05-11 13:06:38 UTC

(In reply to Raymond from comment #4)
> https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/
> pci/hda/patch_hdmi.c?id=89250f84644676c1ed6a09acef1033e14596a402
> 
> 
> are your codec rev 3 ?

How do I check that?

Anyway Takashi Iwai posted a Patch that fixes this for me on LKML.