From mboxrd@z Thu Jan 1 00:00:00 1970 X-Spam-Checker-Version: SpamAssassin 3.4.4 (2020-01-24) on inbox.vuxu.org X-Spam-Level: X-Spam-Status: No, score=0.0 required=5.0 tests=none autolearn=ham autolearn_force=no version=3.4.4 Received: (qmail 23418 invoked from network); 3 Dec 2021 02:21:47 -0000 Received: from 4ess.inri.net (216.126.196.42) by inbox.vuxu.org with ESMTPUTF8; 3 Dec 2021 02:21:47 -0000 Received: from mx.sdf.org ([205.166.94.24]) by 4ess; Thu Dec 2 21:13:46 -0500 2021 Received: from sdf.org (IDENT:adr@sdf.org [205.166.94.16]) by mx.sdf.org (8.15.2/8.14.5) with ESMTPS id 1B32Dips017347 (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256 bits) verified NO) for <9front@9front.org>; Fri, 3 Dec 2021 02:13:45 GMT Received: from localhost (adr@localhost) by sdf.org (8.15.2/8.12.8/Submit) with ESMTP id 1B32Dm3l000371 for <9front@9front.org>; Fri, 3 Dec 2021 02:13:48 GMT Date: Fri, 3 Dec 2021 02:13:48 +0000 (UTC) From: adr To: 9front@9front.org In-Reply-To: <172D21BD-0B2C-4D13-909B-84EE2AEDB1B2@quintile.net> Message-ID: <7cb3db78-1ec6-3c71-c4cd-8f15c73b2de@SDF.ORG> References: <172D21BD-0B2C-4D13-909B-84EE2AEDB1B2@quintile.net> MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed List-ID: <9front.9front.org> List-Help: X-Glyph: ➈ X-Bullshit: template enhancement information realtime-java database Subject: Re: [9front] bcm-audio Reply-To: 9front@9front.org Precedence: bulk On Fri, 3 Dec 2021, Steve Simon wrote: > the bcm audio driver only worked with one pi model (the pi1 i think). For what I've seen the dma controller interface is almost the same (same base addrs, offsets, etc) with some enhanced channels (DMA4). I'm not sure which are those and which are lite although, just poke the debug regs? The pi4 has now two pwm controllers, the jack is connected to gpios 40 and 41 (if I'm correct) and the code has to be changed to use pwm1 when the soc is BCM2711. > the pi?s audio hardware is very basic, however the soc is capable > of sending i2s to an external dac, whilst being clocked from the > dac. Yes, I think this is the best option for quality audio and I'm sure I'll play with this in the future, but I'd like to be able to use the onboard audio output also. I'll share with the list if I make it work. Regards, adr.