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

3 Nov 2013


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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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At Mon, 30 Sep 2013 02:23:22 +0000,
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Deucher, Alexander wrote:
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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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> 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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> 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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> >>> 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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> 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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> 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?

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

Dagg Stompler

Takashi Iwai

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