From mboxrd@z Thu Jan 1 00:00:00 1970 From: Xuebing Wang Subject: DSD over HDMI: audio data packetization Date: Wed, 31 Dec 2014 21:32:00 +0800 Message-ID: <1420032720.2102.14.camel@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Received: from mail-pd0-f171.google.com (mail-pd0-f171.google.com [209.85.192.171]) by alsa0.perex.cz (Postfix) with ESMTP id 3B00B260554 for ; Wed, 31 Dec 2014 14:32:07 +0100 (CET) Received: by mail-pd0-f171.google.com with SMTP id y13so20960037pdi.2 for ; Wed, 31 Dec 2014 05:32:06 -0800 (PST) List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org To: "alsa-devel@alsa-project.org" Cc: Libin Yang , "; Mengdong Lin" , "; Wu Fengguang" , "; Takashi Iwai" , "; Anssi Hannula" List-Id: alsa-devel@alsa-project.org Hi Community, I am trying to implement DSD (one bit audio) over HDMI, for Intel integrated graphics. I am referencing HDMI specification 1.3a. Regarding audio data packetization, I am referencing spec: 5.3.4 Audio Sample Packet 7.6 Audio Data Packetization Q1) Would you please point to me where is the source code to handle L-PCM audio sample packetization (to implement 5.3.4 Audio Sample Packet)? Q2) I admit that I did not carefully read HD-Audio specification. Is this possible that this L-PCM audio data packetization is done by *hardware* (e.g HDMI related widgets/pins)? Q3) Did we implement "7.2 Audio Sample Clock Capture and Regeneration"? Thanks. Xuebing Wang