From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1750914AbcECENK (ORCPT ); Tue, 3 May 2016 00:13:10 -0400 Received: from regular1.263xmail.com ([211.150.99.140]:35304 "EHLO regular1.263xmail.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750713AbcECENI (ORCPT ); Tue, 3 May 2016 00:13:08 -0400 X-263anti-spam: BIG:0;ABS:1;DNS:0;ATT:0;SPF:S;KSV:0; X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-ABS-CHECKED: 1 X-SKE-CHECKED: 1 X-ADDR-CHECKED: 0 X-KSVirus-check: 0 X-RL-SENDER: sugar.zhang@rock-chips.com X-FST-TO: linux-arm-kernel@lists.infradead.org X-SENDER-IP: 58.22.7.114 X-LOGIN-NAME: sugar.zhang@rock-chips.com X-UNIQUE-TAG: X-ATTACHMENT-NUM: 0 X-DNS-TYPE: 0 Subject: Re: [PATCH 1/2] ASoC: rockchip: i2s: separate capture and playback To: John Keeping , Enric Balletbo Serra References: <1449657147-26959-1-git-send-email-john@metanate.com> <20160430070049.GF14612@serenity.lan> Cc: alsa-devel@alsa-project.org, Heiko Stuebner , linux-kernel@vger.kernel.org, Takashi Iwai , Liam Girdwood , linux-rockchip@lists.infradead.org, Mark Brown , Jaroslav Kysela , "linux-arm-kernel@lists.infradead.org" From: sugar Message-ID: <57282532.7000402@rock-chips.com> Date: Tue, 3 May 2016 12:12:34 +0800 User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:38.0) Gecko/20100101 Thunderbird/38.7.2 MIME-Version: 1.0 In-Reply-To: <20160430070049.GF14612@serenity.lan> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hi John, On 4/30/2016 15:00, John Keeping Wrote: > Hi Enric, > > On Fri, Apr 29, 2016 at 04:59:27PM +0200, Enric Balletbo Serra wrote: >> 2015-12-09 11:32 GMT+01:00 John Keeping : >>> If we only clear the tx/rx state when both are disabled it is not >>> possible to start/stop one multiple times while the other is running. >>> Since the two are independently controlled, treat them as such and >>> remove the false dependency between capture and playback. >>> >>> Signed-off-by: John Keeping >>> --- >>> sound/soc/rockchip/rockchip_i2s.c | 72 +++++++++++++++++---------------------- >>> 1 file changed, 32 insertions(+), 40 deletions(-) >>> >>> diff --git a/sound/soc/rockchip/rockchip_i2s.c b/sound/soc/rockchip/rockchip_i2s.c >>> index 83b1b9c..acc6225 100644 >>> --- a/sound/soc/rockchip/rockchip_i2s.c >>> +++ b/sound/soc/rockchip/rockchip_i2s.c >>> @@ -82,8 +82,8 @@ static void rockchip_snd_txctrl(struct rk_i2s_dev *i2s, int on) >>> I2S_DMACR_TDE_ENABLE, I2S_DMACR_TDE_ENABLE); >>> >>> regmap_update_bits(i2s->regmap, I2S_XFER, >>> - I2S_XFER_TXS_START | I2S_XFER_RXS_START, >>> - I2S_XFER_TXS_START | I2S_XFER_RXS_START); >>> + I2S_XFER_TXS_START, >>> + I2S_XFER_TXS_START); >>> >>> i2s->tx_start = true; >>> } else { >>> @@ -92,27 +92,23 @@ static void rockchip_snd_txctrl(struct rk_i2s_dev *i2s, int on) >>> regmap_update_bits(i2s->regmap, I2S_DMACR, >>> I2S_DMACR_TDE_ENABLE, I2S_DMACR_TDE_DISABLE); >>> >>> - if (!i2s->rx_start) { >>> - regmap_update_bits(i2s->regmap, I2S_XFER, >>> - I2S_XFER_TXS_START | >>> - I2S_XFER_RXS_START, >>> - I2S_XFER_TXS_STOP | >>> - I2S_XFER_RXS_STOP); >>> + regmap_update_bits(i2s->regmap, I2S_XFER, >>> + I2S_XFER_TXS_START, >>> + I2S_XFER_TXS_STOP); >>> >>> - regmap_update_bits(i2s->regmap, I2S_CLR, >>> - I2S_CLR_TXC | I2S_CLR_RXC, >>> - I2S_CLR_TXC | I2S_CLR_RXC); >>> + regmap_update_bits(i2s->regmap, I2S_CLR, >>> + I2S_CLR_TXC, >>> + I2S_CLR_TXC); >>> >>> - regmap_read(i2s->regmap, I2S_CLR, &val); >>> + regmap_read(i2s->regmap, I2S_CLR, &val); >>> >>> - /* Should wait for clear operation to finish */ >>> - while (val) { >>> - regmap_read(i2s->regmap, I2S_CLR, &val); >>> - retry--; >>> - if (!retry) { >>> - dev_warn(i2s->dev, "fail to clear\n"); >>> - break; >>> - } >>> + /* Should wait for clear operation to finish */ >>> + while (val & I2S_CLR_TXC) { >>> + regmap_read(i2s->regmap, I2S_CLR, &val); >>> + retry--; >>> + if (!retry) { >>> + dev_warn(i2s->dev, "fail to clear\n"); >>> + break; >>> } >>> } >>> } >>> @@ -128,8 +124,8 @@ static void rockchip_snd_rxctrl(struct rk_i2s_dev *i2s, int on) >>> I2S_DMACR_RDE_ENABLE, I2S_DMACR_RDE_ENABLE); >>> >>> regmap_update_bits(i2s->regmap, I2S_XFER, >>> - I2S_XFER_TXS_START | I2S_XFER_RXS_START, >>> - I2S_XFER_TXS_START | I2S_XFER_RXS_START); >>> + I2S_XFER_RXS_START, >>> + I2S_XFER_RXS_START); >>> >>> i2s->rx_start = true; >>> } else { >>> @@ -138,27 +134,23 @@ static void rockchip_snd_rxctrl(struct rk_i2s_dev *i2s, int on) >>> regmap_update_bits(i2s->regmap, I2S_DMACR, >>> I2S_DMACR_RDE_ENABLE, I2S_DMACR_RDE_DISABLE); >>> >>> - if (!i2s->tx_start) { >>> - regmap_update_bits(i2s->regmap, I2S_XFER, >>> - I2S_XFER_TXS_START | >>> - I2S_XFER_RXS_START, >>> - I2S_XFER_TXS_STOP | >>> - I2S_XFER_RXS_STOP); >>> + regmap_update_bits(i2s->regmap, I2S_XFER, >>> + I2S_XFER_RXS_START, >>> + I2S_XFER_RXS_STOP); >>> >>> - regmap_update_bits(i2s->regmap, I2S_CLR, >>> - I2S_CLR_TXC | I2S_CLR_RXC, >>> - I2S_CLR_TXC | I2S_CLR_RXC); >>> + regmap_update_bits(i2s->regmap, I2S_CLR, >>> + I2S_CLR_RXC, >>> + I2S_CLR_RXC); >>> >>> - regmap_read(i2s->regmap, I2S_CLR, &val); >>> + regmap_read(i2s->regmap, I2S_CLR, &val); >>> >>> - /* Should wait for clear operation to finish */ >>> - while (val) { >>> - regmap_read(i2s->regmap, I2S_CLR, &val); >>> - retry--; >>> - if (!retry) { >>> - dev_warn(i2s->dev, "fail to clear\n"); >>> - break; >>> - } >>> + /* Should wait for clear operation to finish */ >>> + while (val & I2S_CLR_RXC) { >>> + regmap_read(i2s->regmap, I2S_CLR, &val); >>> + retry--; >>> + if (!retry) { >>> + dev_warn(i2s->dev, "fail to clear\n"); >>> + break; >>> } >>> } >>> } >>> -- >>> 2.6.3.462.gbe2c914 >> >> Using my Veyron Jerry Chromebook wiht latest kernel I found that the >> speakers doesn't work. Bisect points to this patch as the offending >> commit. However your changes looks reasonable the fact is that >> reverting the patch makes the audio work again on my device. I need to >> dig a bit more into the issue, but meanwhile, any idea on what is >> happening ? Can I ask which device did you test? > > I tested this on a Radxa Rock2 square. This change fixed an issue I > found when running separate processes for playback and recording (I was > testing with arecord and speaker-test IIRC) but I don't think that > should be relevant. I just read through the patch again and I can't see > anything obviously wrong so I'm afraid I don't have any idea what's > causing the problem you're seeing. > Do you have test playback/capture at the same time? I think you may reproduce this issue if you do as follows: step 1: tinyplay test.wav -D 0 -d 0 -p 1024 -n 4 & step 2: tinycap r.wav -D 0 -d 0 -p 1024 -n 4 & you will find that there is no music now. because of this problem, we enable tx/rx at the same time to WA this issue. May I know what's the issue that you met before? > > John > > _______________________________________________ > Linux-rockchip mailing list > Linux-rockchip@lists.infradead.org > http://lists.infradead.org/mailman/listinfo/linux-rockchip > > >