New subject: [alsa-devel] [Alsa-user] hdmi sound rerouted?

4 Nov 2013


      the original issue is that wen using an ATI gpu with hdmi in it, rerouting the sound via the ati hdmi card doesn't work, only via the generic.
alsa devs pointed out that the ati cards listed in intel_hda.c aren't updated with latest cards due to insufficient info on about the cards.
Alex Deucher from AMD's dev answered that he will query the right team in his workplace but no response was received fro him yet.
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----- Original Message -----
From: Takashi Iwai
Sent: 11/04/13 10:43 AM
To: Dagg Stompler
Subject: Re: [alsa-devel] [Alsa-user]  hdmi sound rerouted?
At Sun, 03 Nov 2013 08:50:55 +0100,
Dagg Stompler wrote:
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----- Original Message -----
From: Deucher, Alexander
Sent: 10/19/13 03:59 PM
To: Dagg Stompler, Takashi Iwai
Subject: RE: [alsa-devel] [Alsa-user]  hdmi sound rerouted?
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-----Original Message-----
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From: Dagg Stompler [mailto:daggs@gmx.com]
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Sent: Saturday, October 19, 2013 5:49 AM
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To: Takashi Iwai; Deucher, Alexander
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Cc: Clemens Ladisch; alsa-user@lists.sourceforge.net; alsa-devel@alsa-
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project.org
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Subject: Re: [alsa-devel] [Alsa-user] hdmi sound rerouted?
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----- Original Message -----
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From: Takashi Iwai
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Sent: 10/08/13 10:49 AM
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To: Deucher, Alexander
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Subject: Re: [alsa-devel] [Alsa-user]  hdmi sound rerouted?
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At Mon, 7 Oct 2013 13:36:24 +0000,
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Deucher, Alexander wrote:
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> -----Original Message-----
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> From: Takashi Iwai [mailto:tiwai@suse.de]
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> Sent: Monday, September 30, 2013 5:18 AM
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> To: Deucher, Alexander
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> Cc: Clemens Ladisch; Dagg Stompler; alsa-user@lists.sourceforge.net;
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alsa-
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> devel@alsa-project.org
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> Subject: Re: [alsa-devel] [Alsa-user] hdmi sound rerouted?
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>
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> At Mon, 30 Sep 2013 02:23:22 +0000,
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> Deucher, Alexander wrote:
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> >
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> > > -----Original Message-----
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> > > From: Clemens Ladisch [mailto:cladisch@googlemail.com]
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> > > Sent: Saturday, September 28, 2013 6:33 PM
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> > > To: Dagg Stompler
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> > > Cc: alsa-user@lists.sourceforge.net; Deucher, Alexander; alsa-
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> devel@alsa-
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> > > project.org
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> > > Subject: Re: [Alsa-user] [alsa-devel] hdmi sound rerouted?
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> > >
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> > > Dagg Stompler wrote:
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> > > >> daggs@gmx.com wrote:
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> > > >>> card 0: PCH [HDA Intel PCH], device 3: HDMI 0 [HDMI 0]
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> > > >>> card 1: Generic [HD-Audio Generic], device 3: HDMI 0 [HDMI 0]
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> > > >>> card 2: HDMI [HDA ATI HDMI], device 3: HDMI 0 [HDMI 0]
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> > > >>
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> > > >> The second one is called "Generic" because your kernel does not
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(yet)
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> > > >> know the hardware.
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> > > >>
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> > > >>> 01:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI]
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Cedar
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> > > HDMI Audio [Radeon HD 5400/6300 Series]
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> > > >>> 06:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI]
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RV635
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> > > HDMI Audio [Radeon HD 3600 Series]
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> > > >>
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> > > >> These are the HDMI outputs of *two* graphics cards. The first
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one's
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> > > >> model is so new that the driver doesn't know it.
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> > > >
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> > > > the 3600 doesn't have hdmi socket so I think it is irrelevant for my
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issue.
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> > >
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> > > The RV635 chip does support HDMI outputs (even if none are
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actually
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> > > connected), so the corresponding PCI device shows up here.
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> > >
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> > > >>> If you update the kernel, you will get two devices named "HDA
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ATI
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> > > HDMI".
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> > > >
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> > > > upgrade to where?
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> > >
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> > > Oops. Even the latest driver lacks the PCI IDs of many HDMI HDA
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devices
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> > > (aa50/aa58/aa60/aa68/aa80/aa88/aa90/aa98:
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> > > Cypress/Juniper/Redwood/Cedar/
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> > > Cayman+Antilles/Barts/Turks/Caicos).
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> > >
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> > > Alex, are these devices that require disabling snooping?
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> > Sorry what does snooping mean in this context?
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> Most of HD-audio controller have a snoop control, but the recent AMD
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> HDMI audio controller don't have the feature, thus the driver must use
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> the non-cached pages. At least, PCI ID 1002:aaa0, aaa8 and aab0 are
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> known to require such.
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> Now the question is whether all new chips above (aa50,...) require the
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> same workaround, too. Could you check this or forward the inquiry to
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> someone in AMD?
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According to our internal teams, disabling snooping is only required on
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the audio parts included in Evergreen and Northern Islands GPUs. Older chips
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like R7xx (aa48) and newer chips like Southern Islands (aaa0) are able to use
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snooping. I'm not real familiar with the audio portions of the GPUs so if you
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need further clarification, let me know.
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Thanks for the information.
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Though, it's strange that the information doesn't match with what I've
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heard (and also with what I've tested with a laptop). I've heard that
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it's Southern Island HDMI that needs the snoop-disablement.
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Could you ask again whether it's really Evergreen / Nothern Islands?
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thanks,
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Takashi
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Alex
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> FWIW, such a chip needs to set AZX_DRIVER_ATIHDMI_NS bits in
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> driver_data of pci entries in sound/pci/hda/hda_intel.c.
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> thanks,
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> Takashi
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any updates on the matter guys?
Haven't heard back. I'll ping them again.
Alex
sorry for nudging, any updates?
Well, what's your original issue?
I wasn't in the loop from the beginning, so I don't know what is the
information you need to know.
If disablement of the snoop is mandatory on your board, we need to add
the workaround in the driver no matter what spec says.  (The datasheet
is often wrong in practice :)
Takashi

Re: [alsa-devel] [Alsa-user] hdmi sound rerouted?

daggs＠gmx.com

Takashi Iwai

Deucher, Alexander

Takashi Iwai

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