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Fri, 27 Nov 2020 17:49:00 GMT Received: by smtp.codeaurora.org (Postfix, from userid 1001) id 18892C43460; Fri, 27 Nov 2020 17:49:00 +0000 (UTC) Received: from [172.20.10.2] (unknown [27.59.128.68]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: srivasam) by smtp.codeaurora.org (Postfix) with ESMTPSA id B9F65C433C6; Fri, 27 Nov 2020 17:48:54 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org B9F65C433C6 Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: aws-us-west-2-caf-mail-1.web.codeaurora.org; spf=fail smtp.mailfrom=srivasam@codeaurora.org Subject: Re: [PATCH v3] ASoC: qcom: Fix playback recover problem in suspend resume To: Srinivas Kandagatla , agross@kernel.org, bjorn.andersson@linaro.org, lgirdwood@gmail.com, broonie@kernel.org, robh+dt@kernel.org, plai@codeaurora.org, bgoswami@codeaurora.org, perex@perex.cz, tiwai@suse.com, rohitkr@codeaurora.org, linux-arm-msm@vger.kernel.org, alsa-devel@alsa-project.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org References: <1606470988-26965-1-git-send-email-srivasam@codeaurora.org> <1146040c-5559-f4bf-fafe-eb7468e577a0@linaro.org> From: Srinivasa Rao Mandadapu Organization: Qualcomm India Private Limited. Message-ID: <0055cc2e-87f1-bcc3-247b-8a4bd1bea883@codeaurora.org> Date: Fri, 27 Nov 2020 23:18:52 +0530 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:78.0) Gecko/20100101 Thunderbird/78.5.0 MIME-Version: 1.0 In-Reply-To: <1146040c-5559-f4bf-fafe-eb7468e577a0@linaro.org> Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit Content-Language: en-US Cc: V Sujith Kumar Reddy X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: "Alsa-devel mailing list for ALSA developers - http://www.alsa-project.org" List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: alsa-devel-bounces@alsa-project.org Sender: "Alsa-devel" Thanks a lot  Srinivas for your valuable review comments and for your time!!! On 11/27/2020 5:39 PM, Srinivas Kandagatla wrote: > > > On 27/11/2020 09:56, Srinivasa Rao Mandadapu wrote: >> To support playback continuation after hard suspend(bypass powerd) >>   and resume: >> Prepare device in  platform trigger callback. >> Make I2s and DMA control registers as non volatile. > Looks like there are two changes here, One is fixing the volatile > registers! > > > Other is preparing device after suspend! > > Consider splitting them! > Okay will split and share. >> > > Fixes tag is missing here? > Actually fixing volatile registers is just partial reversal of commit b1824968221c ("ASoC: qcom: Fix enabling BCLK and LRCLK in LPAIF invalid state") Will revert and share the patch separately. >> Signed-off-by: V Sujith Kumar Reddy >> Signed-off-by: Srinivasa Rao Mandadapu >> --- >> Changes Since v1 and v2: >>    -- Subject lines changed >> >>   sound/soc/qcom/lpass-cpu.c      | 8 ++------ >>   sound/soc/qcom/lpass-platform.c | 5 +++-- >>   2 files changed, 5 insertions(+), 8 deletions(-) >> >> diff --git a/sound/soc/qcom/lpass-cpu.c b/sound/soc/qcom/lpass-cpu.c >> index af684fd..c99be03 100644 >> --- a/sound/soc/qcom/lpass-cpu.c >> +++ b/sound/soc/qcom/lpass-cpu.c >> @@ -454,20 +454,16 @@ static bool lpass_cpu_regmap_volatile(struct >> device *dev, unsigned int reg) >>       struct lpass_variant *v = drvdata->variant; >>       int i; >>   -    for (i = 0; i < v->i2s_ports; ++i) >> -        if (reg == LPAIF_I2SCTL_REG(v, i)) >> -            return true; >>       for (i = 0; i < v->irq_ports; ++i) >>           if (reg == LPAIF_IRQSTAT_REG(v, i)) >>               return true; >>         for (i = 0; i < v->rdma_channels; ++i) >> -        if (reg == LPAIF_RDMACURR_REG(v, i) || reg == >> LPAIF_RDMACTL_REG(v, i)) >> +        if (reg == LPAIF_RDMACURR_REG(v, i)) >>               return true; >>         for (i = 0; i < v->wrdma_channels; ++i) >> -        if (reg == LPAIF_WRDMACURR_REG(v, i + >> v->wrdma_channel_start) || >> -            reg == LPAIF_WRDMACTL_REG(v, i + v->wrdma_channel_start)) >> +        if (reg == LPAIF_WRDMACURR_REG(v, i + v->wrdma_channel_start)) >>               return true; >>         return false; >> diff --git a/sound/soc/qcom/lpass-platform.c >> b/sound/soc/qcom/lpass-platform.c >> index 80b09de..2b0a7c1 100644 >> --- a/sound/soc/qcom/lpass-platform.c >> +++ b/sound/soc/qcom/lpass-platform.c >> @@ -481,8 +481,9 @@ static int lpass_platform_pcmops_trigger(struct >> snd_soc_component *component, >>           return -ENOTRECOVERABLE; >>       } >>       switch (cmd) { >> -    case SNDRV_PCM_TRIGGER_START: >>       case SNDRV_PCM_TRIGGER_RESUME: >> +        lpass_platform_pcmops_prepare(component, substream); > > Can you elaborate the actual issue here? > > Are any other registers needs to re-programmed?? > > Does it make sense to use > regcache_mark_dirty() > regcache_sync() in pm suspend resume path, > instead of calling prepare explicitly? > > > --srini > Yes it's working fine with regcache APIs. will update the patch. > >> +    case SNDRV_PCM_TRIGGER_START: >>       case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: >>           ret = regmap_fields_write(dmactl->enable, id, >>                            LPAIF_DMACTL_ENABLE_ON); >> @@ -592,7 +593,7 @@ static int lpass_platform_pcmops_trigger(struct >> snd_soc_component *component, >>           break; >>       } >>   -    return 0; >> +    return ret; >>   } >>     static snd_pcm_uframes_t lpass_platform_pcmops_pointer( >> -- Qualcomm India Private Limited, on behalf of Qualcomm Innovation Center, Inc., is a member of Code Aurora Forum, a Linux Foundation Collaborative Project.