[Bug 94652] New: Reloading the module creates two additional playback devices for HDMI.

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=94652

            Bug ID: 94652
           Summary: Reloading the module creates two additional playback
                    devices for HDMI.
           Product: DRI
           Version: DRI git
          Hardware: x86-64 (AMD64)
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/Intel
          Assignee: intel-gfx-bugs at lists.freedesktop.org
          Reporter: marius.c.vlad at intel.com
        QA Contact: intel-gfx-bugs at lists.freedesktop.org
                CC: intel-gfx-bugs at lists.freedesktop.org

Freshly booted machines shows:

$ cat /proc/asound/pcm 
00-03: HDMI 0 : HDMI 0 : playback 1
01-00: ALC662 rev3 Analog : ALC662 rev3 Analog : playback 1 : capture 1
01-02: ALC662 rev3 Alt Analog : ALC662 rev3 Alt Analog : capture 1


$ cat /proc/asound/cards 
 0 [HDMI           ]: HDA-Intel - HDA Intel HDMI
                      HDA Intel HDMI at 0xf7e14000 irq 36
 1 [PCH            ]: HDA-Intel - HDA Intel PCH
                      HDA Intel PCH at 0xf7e10000 irq 35

$ ls -1 /proc/asound/HDMI/
codec#0
eld#0.0
id
pcm3p

Upload reloading i915 module (w/ drv_module_reload) I get:

$ ls -1 /proc/asound/HDMI/
codec#0
eld#0.0
eld#0.1
eld#0.2
id
pcm3p
pcm7p
pcm8p


The following remains the same:

$ cat /proc/asound/cards 
 0 [HDMI           ]: HDA-Intel - HDA Intel HDMI
                      HDA Intel HDMI at 0xf7e14000 irq 36
 1 [PCH            ]: HDA-Intel - HDA Intel PCH
                      HDA Intel PCH at 0xf7e10000 irq 35


$ ls -1 /proc/asound/card0/
codec#0
eld#0.0
eld#0.1
eld#0.2
id
pcm3p
pcm7p
pcm8p

pcm7p and pcm8p and their ELDs are bogus.

If I try to override the EDID, I could check EID-ELD conversion working by
looking at /proc/asound/HDMI/eld#0.0. Upon reloading it seems that
/proc/asound/HDMI/eld#0.1 gets filled with ELD information.

Just reloading snd_hda_intel doesn't trigger it. 

Used drm-intel-nightly:

commit 3b8b9e2deb9f23e1a841d0f9d80296a9759ff8f8
Author: Jani Nikula <jani.nikula at intel.com>
Date:   Mon Mar 21 15:04:36 2016 +0200

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