[Bug 208679] New: AMDGPU - HDMI audio not available

[Bug 208679] New: AMDGPU - HDMI audio not available

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=208679

            Bug ID: 208679
           Summary: AMDGPU - HDMI audio not available
           Product: Drivers
           Version: 2.5
    Kernel Version: 5.7.10
          Hardware: All
                OS: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Video(DRI - non Intel)
          Assignee: drivers_video-dri@kernel-bugs.osdl.org
          Reporter: kurmikon@libero.it
        Regression: No

Hello, I have an HP laptop with the following specs:

0:00.0 Host bridge: Advanced Micro Devices, Inc. [AMD] Family 16h (Models
30h-3fh) Processor Root Complex
00:01.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI]
Mullins [Radeon R3 Graphics] (rev 40)
00:01.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] Kabini HDMI/DP
Audio

The VGA belongs to CIK Sea Island Family. The system is running Arch Linux with
latest kernel without issues. Used radeon driver for years, then switched to
amdgpu to test how they work. No issues until I needed to play something
through HDMI port.

Video is good, but audio device is not available. So I switched back to radeon
and HDMI audio is working, but I'm experiencing gpu lockup freezes. So I need
to switch back to amdgpu which is more reliable since I don't get freezes even
if its support for CIK is experimental. But I don't get HDMI audio with this
driver.

When I do a test with aplay, it shows the following error: "set_params:1349:
Channels count non available"

Is there a way to get HDMI audio working on amdgpu for my card? Thanks.

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[Bug 208679] AMDGPU - HDMI audio not available

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=208679

Alex Deucher (alexdeucher@gmail.com) changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |alexdeucher@gmail.com

--- Comment #1 from Alex Deucher (alexdeucher@gmail.com) ---
You can append amdgpu.dc=1 to the kernel command line in grub.  However DC
lacks analog display support (e.g., VGA) so you will lose VGA support.

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[Bug 208679] AMDGPU - HDMI audio not available

[bugzilla-daemon]

https://bugzilla.kernel.org/show_bug.cgi?id=208679

kurmikon@libero.it changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |CODE_FIX

--- Comment #2 from kurmikon@libero.it ---
That kernel parameter is working. No need VGA support. Thanks.

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