From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-14.6 required=3.0 tests=BAYES_00,DKIMWL_WL_MED, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_IN_DEF_DKIM_WL autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 3A581C433E2 for ; Wed, 22 Jul 2020 03:15:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1A20320771 for ; Wed, 22 Jul 2020 03:15:46 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=google.com header.i=@google.com header.b="o+sfsjMC" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731856AbgGVDPp (ORCPT ); Tue, 21 Jul 2020 23:15:45 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60412 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731621AbgGVDPo (ORCPT ); Tue, 21 Jul 2020 23:15:44 -0400 Received: from mail-io1-xd43.google.com (mail-io1-xd43.google.com [IPv6:2607:f8b0:4864:20::d43]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 78C76C061794 for ; Tue, 21 Jul 2020 20:15:44 -0700 (PDT) Received: by mail-io1-xd43.google.com with SMTP id a12so988919ion.13 for ; Tue, 21 Jul 2020 20:15:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to :cc; bh=45JomO1d9wejy1HPoYxaCzisM7wW+NcLf1i+9Sigraw=; b=o+sfsjMCDuKPzbe/qIeYMbzrEqO1c3cG6lOfmpnyTEQm+sA/yJ7z+qHiKEtgfUSGpV wMHw163AiILZEL7mx9dOU1WNE5kixKXY7q5NnrEUACGAFtwWFsWKdiRNJUyepwilvgnY iUn0p2++v3ZaNkQioAz7VGloQD2D6dHBNUGz5/vSQwvYkSesZoiwJQ8HnhyMZ6enhZKr DkV6zb9TmsuIxgw003JvA4UaCJ2+HAtqFGqwIpq6Yo3VADMSwQfMzOgQnC2bjgrGkQvB i3j1u9ZQZnzkMYpllOWdDbcDqymwGviqmmwK2tUcfutCvtQpZAb2xrrWvd8ElWMbZGO0 7aTw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=45JomO1d9wejy1HPoYxaCzisM7wW+NcLf1i+9Sigraw=; b=G1gokVG6Iec+4TlnIHkYx/jvmYCeCfSg7LdqfGEhl0UAa7PtYuYwE9mclc/f++0yl0 Fvr6Ri6rkwTXh6kYXNJgfQJSbyDdbwELzkwgxsS86uX5I6EouEtfHi1rbZvAZItYTvbI EoRgRiKsyZDDZ/7YE7SKSZmnprEK9vY2lCfae2Dv56wBltjMLuceO1xwRJcT97CuLxB0 7OVakxYlKSv6fVURrRJEUGegNkZEMuAk68/eSl2Rvwu12sGWKhh+OU1AxVyQ39qKdxvg 6bGJqdkyz2VrmAty42p9WzrN7osMVWNOxxtPwno59d3LgHeK12a14D7oYVWl2MhLxUct tHAA== X-Gm-Message-State: AOAM533f20COfSNN94e9jPntEcISgA+dUow1aQkvIFe6hh06fiAcva7c Mtj3ODhFdh/Cl0WxXeu9vbx+W77Bo2lL2ckur83S9Q== X-Google-Smtp-Source: ABdhPJytvgzhX6bIeTKuXIhQ8Ogfb1O2KxTd1ZdvSE0ibGG3xWtYgYMUBBjc4eOOaKb7vSbZzLHEhfw0MosrRiQSayg= X-Received: by 2002:a6b:d301:: with SMTP id s1mr30475980iob.146.1595387743234; Tue, 21 Jul 2020 20:15:43 -0700 (PDT) MIME-Version: 1.0 References: <20200721104422.369368-1-cychiang@chromium.org> <20200721104422.369368-3-cychiang@chromium.org> In-Reply-To: <20200721104422.369368-3-cychiang@chromium.org> From: Tzung-Bi Shih Date: Wed, 22 Jul 2020 11:15:32 +0800 Message-ID: Subject: Re: [PATCH v2 2/2] ASoC: qcom: sc7180: Add machine driver for sound card registration To: Cheng-Yi Chiang Cc: Linux Kernel Mailing List , Mark Brown , Taniya Das , Rohit kumar , Banajit Goswami , Patrick Lai , Andy Gross , Bjorn Andersson , Liam Girdwood , Rob Herring , Jaroslav Kysela , Takashi Iwai , Douglas Anderson , dgreid@chromium.org, Tzung-Bi Shih , linux-arm-kernel@lists.infradead.org, linux-arm-msm@vger.kernel.org, devicetree@vger.kernel.org, ALSA development , Ajit Pandey Content-Type: text/plain; charset="UTF-8" Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org On Tue, Jul 21, 2020 at 6:44 PM Cheng-Yi Chiang wrote: > diff --git a/sound/soc/qcom/sc7180.c b/sound/soc/qcom/sc7180.c > new file mode 100644 > index 000000000000..3beb2b129d01 > --- /dev/null > +++ b/sound/soc/qcom/sc7180.c > @@ -0,0 +1,380 @@ > +// SPDX-License-Identifier: GPL-2.0-only > +// > +//Copyright (c) 2020, The Linux Foundation. All rights reserved. > +// > +//sc7180.c -- ALSA SoC Machine driver for SC7180 Insert an extra space between // and text to make it look better. > +static int sc7180_headset_init(struct snd_soc_component *component); > + > +static struct snd_soc_aux_dev sc7180_headset_dev = { > + .dlc = COMP_EMPTY(), > + .init = sc7180_headset_init, > +}; Move definition of sc7180_headset_dev after sc7180_headset_init( ) so that you don't need forward declaration of sc7180_headset_init( ). > +static unsigned int primary_dai_fmt = SND_SOC_DAIFMT_CBS_CFS | > + SND_SOC_DAIFMT_NB_NF | > + SND_SOC_DAIFMT_I2S; > + > +static int sc7180_snd_startup(struct snd_pcm_substream *substream) > +{ > + struct snd_soc_pcm_runtime *rtd = substream->private_data; > + struct snd_soc_card *card = rtd->card; > + struct sc7180_snd_data *data = snd_soc_card_get_drvdata(card); > + struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0); > + struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0); > + int ret; > + > + switch (cpu_dai->id) { > + case MI2S_PRIMARY: > + if (++data->pri_mi2s_clk_count == 1) { > + snd_soc_dai_set_sysclk(cpu_dai, > + LPASS_MCLK0, > + DEFAULT_MCLK_RATE, > + SNDRV_PCM_STREAM_PLAYBACK); > + } > + snd_soc_dai_set_fmt(codec_dai, primary_dai_fmt); My comment on the previous thread may mislead. My original intent: move the DAIFMT setting to DAI link->dai_fmt in sc7180_parse_of( ). If you need to keep it as is: inline the SND_SOC_DAIFMT_* into snd_soc_dai_set_fmt( ) (i.e. eliminate primary_dai_fmt). > +static int sc7180_parse_of(struct snd_soc_card *card) > +{ > + struct device_node *np; > + struct device_node *codec = NULL; > + struct device_node *platform = NULL; The function doesn't use platform. > + struct device_node *cpu = NULL; > + struct device *dev = card->dev; > + struct snd_soc_dai_link *link; > + struct of_phandle_args args; > + struct snd_soc_dai_link_component *dlc; > + int ret, num_links; > + > + ret = snd_soc_of_parse_card_name(card, "model"); > + if (ret) { > + dev_err(dev, "Error parsing card name: %d\n", ret); > + return ret; > + } > + > + /* DAPM routes */ > + if (of_property_read_bool(dev->of_node, "audio-routing")) { > + ret = snd_soc_of_parse_audio_routing(card, > + "audio-routing"); > + if (ret) > + return ret; > + } > + > + /* headset aux dev. */ > + sc7180_headset_dev.dlc.of_node = of_parse_phandle( > + dev->of_node, "aux-dev", 0); > + if (!sc7180_headset_dev.dlc.of_node) { > + dev_err(dev, > + "Property 'aux-dev' missing/invalid\n"); > + return -EINVAL; > + } > + > + /* Populate links */ > + num_links = of_get_child_count(dev->of_node); Eliminate num_links but use card->num_links directly. > + > + /* Allocate the DAI link array */ > + card->dai_link = devm_kcalloc(dev, num_links, sizeof(*link), > + GFP_KERNEL); > + if (!card->dai_link) > + return -ENOMEM; > + > + card->num_links = num_links; Ditto, eliminate it. > + link = card->dai_link; > + Eliminate the blank line to make "link = card->dai_link" and the following for-loop "a whole thing". > + for_each_child_of_node(dev->of_node, np) { > + dlc = devm_kzalloc(dev, 2 * sizeof(*dlc), GFP_KERNEL); > + if (!dlc) > + return -ENOMEM; > + > + link->cpus = &dlc[0]; > + link->platforms = &dlc[1]; > + > + link->num_cpus = 1; > + link->num_platforms = 1; > + > + ret = of_property_read_string(np, "link-name", &link->name); > + if (ret) { > + dev_err(card->dev, > + "error getting codec dai_link name\n"); > + goto err; > + } > + > + link->playback_only = of_property_read_bool(np, > + "playback_only"); > + link->capture_only = of_property_read_bool(np, > + "capture_only"); > + > + if (link->playback_only && link->capture_only) { > + dev_err(card->dev, > + "getting both playback and capture only\n"); ret = -EINVAL; > + goto err; > + } > + > + cpu = of_get_child_by_name(np, "cpu"); > + codec = of_get_child_by_name(np, "codec"); Move to below. > + > + if (!cpu) { > + dev_err(dev, "%s: Can't find cpu DT node\n", > + link->name); > + ret = -EINVAL; > + goto err; > + } > + > + ret = of_parse_phandle_with_args(cpu, "sound-dai", > + "#sound-dai-cells", 0, &args); I may overlook it but I failed to find "#sound-dai-cells" in the dt-binding example. I think it should be in DTS? > + if (ret) { > + dev_err(card->dev, "%s: error getting cpu phandle\n", > + link->name); > + goto err; > + } > + link->cpus->of_node = args.np; > + link->id = args.args[0]; I am not quite sure what it will be. I guess one of the following comes from DTS node name. #define MI2S_PRIMARY 0 #define MI2S_SECONDARY 1 > + > + ret = snd_soc_of_get_dai_name(cpu, &link->cpus->dai_name); > + if (ret) { > + dev_err(card->dev, "%s: error getting cpu dai name\n", > + link->name); > + goto err; > + } > + Move "codec = of_get_child_by_name(np, "codec");" to here. > + if (codec) { > + ret = snd_soc_of_get_dai_link_codecs(dev, codec, link); > + if (ret < 0) { > + dev_err(card->dev, "%s: codec dai not found\n", > + link->name); > + goto err; > + } > + } else { > + dlc = devm_kzalloc(dev, sizeof(*dlc), GFP_KERNEL); > + if (!dlc) > + return -ENOMEM; > + > + link->codecs = dlc; > + link->num_codecs = 1; > + > + link->codecs->dai_name = "snd-soc-dummy-dai"; > + link->codecs->name = "snd-soc-dummy"; > + } > + > + link->platforms->of_node = link->cpus->of_node; > + link->stream_name = link->name; > + link->ops = &sc7180_ops; > + link++; > + > + of_node_put(cpu); > + of_node_put(codec); cpu = NULL; codec = NULL; In case of double of_node_put( ). > + } > + > + return 0; > +err: > + of_node_put(np); I guess you don't need this. > + of_node_put(cpu); > + of_node_put(codec); > + of_node_put(platform); Eliminate it, not used. > +static int sc7180_snd_platform_probe(struct platform_device *pdev) > +{ > + struct snd_soc_card *card; > + struct sc7180_snd_data *data; > + struct device *dev = &pdev->dev; > + int ret; > + > + card = &sc7180_card; In this case, inline the initialization while declaration. > + > + /* Allocate the private data */ > + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); > + if (!data) > + return -ENOMEM; > + > + card->dapm_widgets = sc7180_snd_widgets; > + card->num_dapm_widgets = ARRAY_SIZE(sc7180_snd_widgets); Remove them. > + card->dev = dev; > + dev_set_drvdata(dev, card); I guess you don't need this if using devm_snd_soc_register_card(...). Insert a blank line. > + ret = sc7180_parse_of(card); > + if (ret) { > + dev_err(dev, "Error parsing OF data\n"); > + return ret; > + } > + > + data->card = card; Looks like data->card is not used. > + snd_soc_card_set_drvdata(card, data); > + > + ret = snd_soc_register_card(card); > + if (ret) { > + dev_err(dev, "Sound card registration failed\n"); > + return ret; > + } > + return ret; Just return devm_snd_soc_register_card(...); > +static int sc7180_snd_platform_remove(struct platform_device *pdev) > +{ > + struct snd_soc_card *card = dev_get_drvdata(&pdev->dev); > + > + snd_soc_unregister_card(card); > + return 0; > +} Can be removed if using devm_snd_soc_register_card( ). I didn't go through all the cases. But it would be better if all "if (ret < 0)" can be replaced to "if (ret)". 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charset="UTF-8" Cc: Taniya Das , devicetree@vger.kernel.org, Tzung-Bi Shih , Banajit Goswami , ALSA development , Liam Girdwood , linux-arm-msm@vger.kernel.org, Patrick Lai , Takashi Iwai , Linux Kernel Mailing List , Rob Herring , Bjorn Andersson , Mark Brown , Rohit kumar , Andy Gross , Douglas Anderson , Ajit Pandey , dgreid@chromium.org, linux-arm-kernel@lists.infradead.org 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" On Tue, Jul 21, 2020 at 6:44 PM Cheng-Yi Chiang wrote: > diff --git a/sound/soc/qcom/sc7180.c b/sound/soc/qcom/sc7180.c > new file mode 100644 > index 000000000000..3beb2b129d01 > --- /dev/null > +++ b/sound/soc/qcom/sc7180.c > @@ -0,0 +1,380 @@ > +// SPDX-License-Identifier: GPL-2.0-only > +// > +//Copyright (c) 2020, The Linux Foundation. All rights reserved. > +// > +//sc7180.c -- ALSA SoC Machine driver for SC7180 Insert an extra space between // and text to make it look better. > +static int sc7180_headset_init(struct snd_soc_component *component); > + > +static struct snd_soc_aux_dev sc7180_headset_dev = { > + .dlc = COMP_EMPTY(), > + .init = sc7180_headset_init, > +}; Move definition of sc7180_headset_dev after sc7180_headset_init( ) so that you don't need forward declaration of sc7180_headset_init( ). > +static unsigned int primary_dai_fmt = SND_SOC_DAIFMT_CBS_CFS | > + SND_SOC_DAIFMT_NB_NF | > + SND_SOC_DAIFMT_I2S; > + > +static int sc7180_snd_startup(struct snd_pcm_substream *substream) > +{ > + struct snd_soc_pcm_runtime *rtd = substream->private_data; > + struct snd_soc_card *card = rtd->card; > + struct sc7180_snd_data *data = snd_soc_card_get_drvdata(card); > + struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0); > + struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0); > + int ret; > + > + switch (cpu_dai->id) { > + case MI2S_PRIMARY: > + if (++data->pri_mi2s_clk_count == 1) { > + snd_soc_dai_set_sysclk(cpu_dai, > + LPASS_MCLK0, > + DEFAULT_MCLK_RATE, > + SNDRV_PCM_STREAM_PLAYBACK); > + } > + snd_soc_dai_set_fmt(codec_dai, primary_dai_fmt); My comment on the previous thread may mislead. My original intent: move the DAIFMT setting to DAI link->dai_fmt in sc7180_parse_of( ). If you need to keep it as is: inline the SND_SOC_DAIFMT_* into snd_soc_dai_set_fmt( ) (i.e. eliminate primary_dai_fmt). > +static int sc7180_parse_of(struct snd_soc_card *card) > +{ > + struct device_node *np; > + struct device_node *codec = NULL; > + struct device_node *platform = NULL; The function doesn't use platform. > + struct device_node *cpu = NULL; > + struct device *dev = card->dev; > + struct snd_soc_dai_link *link; > + struct of_phandle_args args; > + struct snd_soc_dai_link_component *dlc; > + int ret, num_links; > + > + ret = snd_soc_of_parse_card_name(card, "model"); > + if (ret) { > + dev_err(dev, "Error parsing card name: %d\n", ret); > + return ret; > + } > + > + /* DAPM routes */ > + if (of_property_read_bool(dev->of_node, "audio-routing")) { > + ret = snd_soc_of_parse_audio_routing(card, > + "audio-routing"); > + if (ret) > + return ret; > + } > + > + /* headset aux dev. */ > + sc7180_headset_dev.dlc.of_node = of_parse_phandle( > + dev->of_node, "aux-dev", 0); > + if (!sc7180_headset_dev.dlc.of_node) { > + dev_err(dev, > + "Property 'aux-dev' missing/invalid\n"); > + return -EINVAL; > + } > + > + /* Populate links */ > + num_links = of_get_child_count(dev->of_node); Eliminate num_links but use card->num_links directly. > + > + /* Allocate the DAI link array */ > + card->dai_link = devm_kcalloc(dev, num_links, sizeof(*link), > + GFP_KERNEL); > + if (!card->dai_link) > + return -ENOMEM; > + > + card->num_links = num_links; Ditto, eliminate it. > + link = card->dai_link; > + Eliminate the blank line to make "link = card->dai_link" and the following for-loop "a whole thing". > + for_each_child_of_node(dev->of_node, np) { > + dlc = devm_kzalloc(dev, 2 * sizeof(*dlc), GFP_KERNEL); > + if (!dlc) > + return -ENOMEM; > + > + link->cpus = &dlc[0]; > + link->platforms = &dlc[1]; > + > + link->num_cpus = 1; > + link->num_platforms = 1; > + > + ret = of_property_read_string(np, "link-name", &link->name); > + if (ret) { > + dev_err(card->dev, > + "error getting codec dai_link name\n"); > + goto err; > + } > + > + link->playback_only = of_property_read_bool(np, > + "playback_only"); > + link->capture_only = of_property_read_bool(np, > + "capture_only"); > + > + if (link->playback_only && link->capture_only) { > + dev_err(card->dev, > + "getting both playback and capture only\n"); ret = -EINVAL; > + goto err; > + } > + > + cpu = of_get_child_by_name(np, "cpu"); > + codec = of_get_child_by_name(np, "codec"); Move to below. > + > + if (!cpu) { > + dev_err(dev, "%s: Can't find cpu DT node\n", > + link->name); > + ret = -EINVAL; > + goto err; > + } > + > + ret = of_parse_phandle_with_args(cpu, "sound-dai", > + "#sound-dai-cells", 0, &args); I may overlook it but I failed to find "#sound-dai-cells" in the dt-binding example. I think it should be in DTS? > + if (ret) { > + dev_err(card->dev, "%s: error getting cpu phandle\n", > + link->name); > + goto err; > + } > + link->cpus->of_node = args.np; > + link->id = args.args[0]; I am not quite sure what it will be. I guess one of the following comes from DTS node name. #define MI2S_PRIMARY 0 #define MI2S_SECONDARY 1 > + > + ret = snd_soc_of_get_dai_name(cpu, &link->cpus->dai_name); > + if (ret) { > + dev_err(card->dev, "%s: error getting cpu dai name\n", > + link->name); > + goto err; > + } > + Move "codec = of_get_child_by_name(np, "codec");" to here. > + if (codec) { > + ret = snd_soc_of_get_dai_link_codecs(dev, codec, link); > + if (ret < 0) { > + dev_err(card->dev, "%s: codec dai not found\n", > + link->name); > + goto err; > + } > + } else { > + dlc = devm_kzalloc(dev, sizeof(*dlc), GFP_KERNEL); > + if (!dlc) > + return -ENOMEM; > + > + link->codecs = dlc; > + link->num_codecs = 1; > + > + link->codecs->dai_name = "snd-soc-dummy-dai"; > + link->codecs->name = "snd-soc-dummy"; > + } > + > + link->platforms->of_node = link->cpus->of_node; > + link->stream_name = link->name; > + link->ops = &sc7180_ops; > + link++; > + > + of_node_put(cpu); > + of_node_put(codec); cpu = NULL; codec = NULL; In case of double of_node_put( ). > + } > + > + return 0; > +err: > + of_node_put(np); I guess you don't need this. > + of_node_put(cpu); > + of_node_put(codec); > + of_node_put(platform); Eliminate it, not used. > +static int sc7180_snd_platform_probe(struct platform_device *pdev) > +{ > + struct snd_soc_card *card; > + struct sc7180_snd_data *data; > + struct device *dev = &pdev->dev; > + int ret; > + > + card = &sc7180_card; In this case, inline the initialization while declaration. > + > + /* Allocate the private data */ > + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); > + if (!data) > + return -ENOMEM; > + > + card->dapm_widgets = sc7180_snd_widgets; > + card->num_dapm_widgets = ARRAY_SIZE(sc7180_snd_widgets); Remove them. > + card->dev = dev; > + dev_set_drvdata(dev, card); I guess you don't need this if using devm_snd_soc_register_card(...). Insert a blank line. > + ret = sc7180_parse_of(card); > + if (ret) { > + dev_err(dev, "Error parsing OF data\n"); > + return ret; > + } > + > + data->card = card; Looks like data->card is not used. > + snd_soc_card_set_drvdata(card, data); > + > + ret = snd_soc_register_card(card); > + if (ret) { > + dev_err(dev, "Sound card registration failed\n"); > + return ret; > + } > + return ret; Just return devm_snd_soc_register_card(...); > +static int sc7180_snd_platform_remove(struct platform_device *pdev) > +{ > + struct snd_soc_card *card = dev_get_drvdata(&pdev->dev); > + > + snd_soc_unregister_card(card); > + return 0; > +} Can be removed if using devm_snd_soc_register_card( ). I didn't go through all the cases. But it would be better if all "if (ret < 0)" can be replaced to "if (ret)". 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a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to:cc; bh=45JomO1d9wejy1HPoYxaCzisM7wW+NcLf1i+9Sigraw=; b=rM+N4yk6rrHcaweg0SZKFyd5wowtptrLvKG34HqvRgmc+5WyBXNbGjEm/2t86WqvJi wMBgdtv6HUvcx8RA+nCl1nPwj/XQCCodTvQ+DaN/YUS5dgX/YJJtBGpbNmKThxa9sBXj CsC1jidw9tA7UrAawLHYJY+61qZku0QqNuwM9AnTLIE9cKlL/MpAPnOkx8ElEaecyAJf bcve6P7Y7pVr7lVo7ggjz41V9mylqLhkxdL9sST/u99rJAuSLRhpJMp4or3h4g/HOGk7 Isa3cg0XUC/fBTQkODWnteQKTWHQ0qlZJORLZEu/UuVs7cu39mkVXp9bfBrjz4pkvwDG JwDQ== X-Gm-Message-State: AOAM531Q9ORcsqWS/3HRsCbrZgNDFrwmwMW9WnO257k1F0LRpYzpqBlP sVA4ZwbbM/jgr5L2oCmtmeakgWs1q1nOh33c5yR5zA== X-Google-Smtp-Source: ABdhPJytvgzhX6bIeTKuXIhQ8Ogfb1O2KxTd1ZdvSE0ibGG3xWtYgYMUBBjc4eOOaKb7vSbZzLHEhfw0MosrRiQSayg= X-Received: by 2002:a6b:d301:: with SMTP id s1mr30475980iob.146.1595387743234; Tue, 21 Jul 2020 20:15:43 -0700 (PDT) MIME-Version: 1.0 References: <20200721104422.369368-1-cychiang@chromium.org> <20200721104422.369368-3-cychiang@chromium.org> In-Reply-To: <20200721104422.369368-3-cychiang@chromium.org> From: Tzung-Bi Shih Date: Wed, 22 Jul 2020 11:15:32 +0800 Message-ID: Subject: Re: [PATCH v2 2/2] ASoC: qcom: sc7180: Add machine driver for sound card registration To: Cheng-Yi Chiang X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200721_231545_705679_CDA087D5 X-CRM114-Status: GOOD ( 26.93 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Taniya Das , devicetree@vger.kernel.org, Tzung-Bi Shih , Banajit Goswami , ALSA development , Liam Girdwood , linux-arm-msm@vger.kernel.org, Patrick Lai , Takashi Iwai , Linux Kernel Mailing List , Rob Herring , Bjorn Andersson , Mark Brown , Rohit kumar , Andy Gross , Douglas Anderson , Ajit Pandey , dgreid@chromium.org, Jaroslav Kysela , linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Tue, Jul 21, 2020 at 6:44 PM Cheng-Yi Chiang wrote: > diff --git a/sound/soc/qcom/sc7180.c b/sound/soc/qcom/sc7180.c > new file mode 100644 > index 000000000000..3beb2b129d01 > --- /dev/null > +++ b/sound/soc/qcom/sc7180.c > @@ -0,0 +1,380 @@ > +// SPDX-License-Identifier: GPL-2.0-only > +// > +//Copyright (c) 2020, The Linux Foundation. All rights reserved. > +// > +//sc7180.c -- ALSA SoC Machine driver for SC7180 Insert an extra space between // and text to make it look better. > +static int sc7180_headset_init(struct snd_soc_component *component); > + > +static struct snd_soc_aux_dev sc7180_headset_dev = { > + .dlc = COMP_EMPTY(), > + .init = sc7180_headset_init, > +}; Move definition of sc7180_headset_dev after sc7180_headset_init( ) so that you don't need forward declaration of sc7180_headset_init( ). > +static unsigned int primary_dai_fmt = SND_SOC_DAIFMT_CBS_CFS | > + SND_SOC_DAIFMT_NB_NF | > + SND_SOC_DAIFMT_I2S; > + > +static int sc7180_snd_startup(struct snd_pcm_substream *substream) > +{ > + struct snd_soc_pcm_runtime *rtd = substream->private_data; > + struct snd_soc_card *card = rtd->card; > + struct sc7180_snd_data *data = snd_soc_card_get_drvdata(card); > + struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0); > + struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0); > + int ret; > + > + switch (cpu_dai->id) { > + case MI2S_PRIMARY: > + if (++data->pri_mi2s_clk_count == 1) { > + snd_soc_dai_set_sysclk(cpu_dai, > + LPASS_MCLK0, > + DEFAULT_MCLK_RATE, > + SNDRV_PCM_STREAM_PLAYBACK); > + } > + snd_soc_dai_set_fmt(codec_dai, primary_dai_fmt); My comment on the previous thread may mislead. My original intent: move the DAIFMT setting to DAI link->dai_fmt in sc7180_parse_of( ). If you need to keep it as is: inline the SND_SOC_DAIFMT_* into snd_soc_dai_set_fmt( ) (i.e. eliminate primary_dai_fmt). > +static int sc7180_parse_of(struct snd_soc_card *card) > +{ > + struct device_node *np; > + struct device_node *codec = NULL; > + struct device_node *platform = NULL; The function doesn't use platform. > + struct device_node *cpu = NULL; > + struct device *dev = card->dev; > + struct snd_soc_dai_link *link; > + struct of_phandle_args args; > + struct snd_soc_dai_link_component *dlc; > + int ret, num_links; > + > + ret = snd_soc_of_parse_card_name(card, "model"); > + if (ret) { > + dev_err(dev, "Error parsing card name: %d\n", ret); > + return ret; > + } > + > + /* DAPM routes */ > + if (of_property_read_bool(dev->of_node, "audio-routing")) { > + ret = snd_soc_of_parse_audio_routing(card, > + "audio-routing"); > + if (ret) > + return ret; > + } > + > + /* headset aux dev. */ > + sc7180_headset_dev.dlc.of_node = of_parse_phandle( > + dev->of_node, "aux-dev", 0); > + if (!sc7180_headset_dev.dlc.of_node) { > + dev_err(dev, > + "Property 'aux-dev' missing/invalid\n"); > + return -EINVAL; > + } > + > + /* Populate links */ > + num_links = of_get_child_count(dev->of_node); Eliminate num_links but use card->num_links directly. > + > + /* Allocate the DAI link array */ > + card->dai_link = devm_kcalloc(dev, num_links, sizeof(*link), > + GFP_KERNEL); > + if (!card->dai_link) > + return -ENOMEM; > + > + card->num_links = num_links; Ditto, eliminate it. > + link = card->dai_link; > + Eliminate the blank line to make "link = card->dai_link" and the following for-loop "a whole thing". > + for_each_child_of_node(dev->of_node, np) { > + dlc = devm_kzalloc(dev, 2 * sizeof(*dlc), GFP_KERNEL); > + if (!dlc) > + return -ENOMEM; > + > + link->cpus = &dlc[0]; > + link->platforms = &dlc[1]; > + > + link->num_cpus = 1; > + link->num_platforms = 1; > + > + ret = of_property_read_string(np, "link-name", &link->name); > + if (ret) { > + dev_err(card->dev, > + "error getting codec dai_link name\n"); > + goto err; > + } > + > + link->playback_only = of_property_read_bool(np, > + "playback_only"); > + link->capture_only = of_property_read_bool(np, > + "capture_only"); > + > + if (link->playback_only && link->capture_only) { > + dev_err(card->dev, > + "getting both playback and capture only\n"); ret = -EINVAL; > + goto err; > + } > + > + cpu = of_get_child_by_name(np, "cpu"); > + codec = of_get_child_by_name(np, "codec"); Move to below. > + > + if (!cpu) { > + dev_err(dev, "%s: Can't find cpu DT node\n", > + link->name); > + ret = -EINVAL; > + goto err; > + } > + > + ret = of_parse_phandle_with_args(cpu, "sound-dai", > + "#sound-dai-cells", 0, &args); I may overlook it but I failed to find "#sound-dai-cells" in the dt-binding example. I think it should be in DTS? > + if (ret) { > + dev_err(card->dev, "%s: error getting cpu phandle\n", > + link->name); > + goto err; > + } > + link->cpus->of_node = args.np; > + link->id = args.args[0]; I am not quite sure what it will be. I guess one of the following comes from DTS node name. #define MI2S_PRIMARY 0 #define MI2S_SECONDARY 1 > + > + ret = snd_soc_of_get_dai_name(cpu, &link->cpus->dai_name); > + if (ret) { > + dev_err(card->dev, "%s: error getting cpu dai name\n", > + link->name); > + goto err; > + } > + Move "codec = of_get_child_by_name(np, "codec");" to here. > + if (codec) { > + ret = snd_soc_of_get_dai_link_codecs(dev, codec, link); > + if (ret < 0) { > + dev_err(card->dev, "%s: codec dai not found\n", > + link->name); > + goto err; > + } > + } else { > + dlc = devm_kzalloc(dev, sizeof(*dlc), GFP_KERNEL); > + if (!dlc) > + return -ENOMEM; > + > + link->codecs = dlc; > + link->num_codecs = 1; > + > + link->codecs->dai_name = "snd-soc-dummy-dai"; > + link->codecs->name = "snd-soc-dummy"; > + } > + > + link->platforms->of_node = link->cpus->of_node; > + link->stream_name = link->name; > + link->ops = &sc7180_ops; > + link++; > + > + of_node_put(cpu); > + of_node_put(codec); cpu = NULL; codec = NULL; In case of double of_node_put( ). > + } > + > + return 0; > +err: > + of_node_put(np); I guess you don't need this. > + of_node_put(cpu); > + of_node_put(codec); > + of_node_put(platform); Eliminate it, not used. > +static int sc7180_snd_platform_probe(struct platform_device *pdev) > +{ > + struct snd_soc_card *card; > + struct sc7180_snd_data *data; > + struct device *dev = &pdev->dev; > + int ret; > + > + card = &sc7180_card; In this case, inline the initialization while declaration. > + > + /* Allocate the private data */ > + data = devm_kzalloc(dev, sizeof(*data), GFP_KERNEL); > + if (!data) > + return -ENOMEM; > + > + card->dapm_widgets = sc7180_snd_widgets; > + card->num_dapm_widgets = ARRAY_SIZE(sc7180_snd_widgets); Remove them. > + card->dev = dev; > + dev_set_drvdata(dev, card); I guess you don't need this if using devm_snd_soc_register_card(...). Insert a blank line. > + ret = sc7180_parse_of(card); > + if (ret) { > + dev_err(dev, "Error parsing OF data\n"); > + return ret; > + } > + > + data->card = card; Looks like data->card is not used. > + snd_soc_card_set_drvdata(card, data); > + > + ret = snd_soc_register_card(card); > + if (ret) { > + dev_err(dev, "Sound card registration failed\n"); > + return ret; > + } > + return ret; Just return devm_snd_soc_register_card(...); > +static int sc7180_snd_platform_remove(struct platform_device *pdev) > +{ > + struct snd_soc_card *card = dev_get_drvdata(&pdev->dev); > + > + snd_soc_unregister_card(card); > + return 0; > +} Can be removed if using devm_snd_soc_register_card( ). I didn't go through all the cases. But it would be better if all "if (ret < 0)" can be replaced to "if (ret)". _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel