Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754695AbbHCSYM (ORCPT ); Mon, 3 Aug 2015 14:24:12 -0400 Received: from bitmer.com ([213.157.87.50]:51003 "EHLO bitmer.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753992AbbHCSYL (ORCPT ); Mon, 3 Aug 2015 14:24:11 -0400 X-Greylist: delayed 1164 seconds by postgrey-1.27 at vger.kernel.org; Mon, 03 Aug 2015 14:24:10 EDT Message-ID: <55BFACE4.1010100@bitmer.com> Date: Mon, 03 Aug 2015 21:03:16 +0300 From: Jarkko Nikula User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:31.0) Gecko/20100101 Icedove/31.7.0 MIME-Version: 1.0 To: =?UTF-8?B?UGFsaSBSb2jDoXI=?= , Lars-Peter Clausen CC: Peter Ujfalusi , linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org, Pavel Machek , Sebastian Reichel , Aaro Koskinen , Tony Lindgren , Nishanth Menon , Ivaylo Dimitrov Subject: Re: Nokia N900 - audio TPA6130A2 problems References: <201507251228.27128@pali> <55B38C59.8060001@metafoo.de> <201508011218.45076@pali> In-Reply-To: <201508011218.45076@pali> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2733 Lines: 72 Hi On 08/01/2015 01:18 PM, Pali Rohár wrote: > On Saturday 25 July 2015 15:17:13 Lars-Peter Clausen wrote: >> On 07/25/2015 12:28 PM, Pali Rohár wrote: >>> Hello, >>> >>> sometimes after rebooting Nokia N900 initializing alsa audio fails. >>> Here output from dmesg log when it happen: >>> >>> [ 6.925140] tpa6130a2 2-0060: Write failed >>> [ 6.929534] tpa6130a2 2-0060: Failed to initialize chip >>> [ 6.935272] tpa6130a2: probe of 2-0060 failed with error -121 >>> [ 7.624237] rx51-audio n900-audio: Failed to add TPA6130A2 >>> controls [ 7.635101] rx51-audio n900-audio: ASoC: failed to >>> init TLV320AIC34: -19 [ 7.645874] rx51-audio n900-audio: ASoC: >>> failed to instantiate card -19 [ 7.665740] rx51-audio >>> n900-audio: snd_soc_register_card failed (-19) [ 8.063049] ALSA >>> device list: >>> [ 8.070343] No soundcards found. >>> >>> Any idea what to do? >> >> Looks like the chip is not responding. Try to add a small delay after >> powerup to give the device to be fully ready, something like the >> following: >> >> --- a/sound/soc/codecs/tpa6130a2.c >> +++ b/sound/soc/codecs/tpa6130a2.c >> @@ -152,6 +152,8 @@ static int tpa6130a2_power(u8 power) >> if (data->power_gpio >= 0) >> gpio_set_value(data->power_gpio, 1); >> >> + msleep(5); >> + >> data->power_state = 1; >> ret = tpa6130a2_initialize(); >> if (ret < 0) { > > > Hello, your patch did not helped. Problem is still there... > For me v4.2-rc5 works, i.e. TPA6130A2 can still play loudly to headphones. Don't know were there any i2c etc regression before it or how easy it would be to reproduce. Logs below made me thinking can it be a HW issue? Although if it is an HW issue it shouldn't work sometimes I guess. Do you have any earlier well known configuration you could try is it an SW regression or something else? > [ 5.962585] tpa6130a2 2-0060: Write failed > [ 5.962707] tpa6130a2 2-0060: Failed to initialize chip > [ 5.962860] tpa6130a2: probe of 2-0060 failed with error -121 -121 == EREMOTEIO which is returned from i2c-omap.c when there is no ACK from the chip. > [ 28.102233] omap_i2c 48072000.i2c: controller timed out > [ 29.463653] lp5523x 2-0032: lp5523 Programmable led chip found > [ 30.734191] omap_i2c 48072000.i2c: controller timed out waiting for start condition to finish > [ 32.142333] i2c i2c-2: SCL is stuck low, exit recovery If SCL is really stuck it also explains why chip doesn't acknowledge. -- Jarkko -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/