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=-9.6 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS,USER_AGENT_GIT autolearn=ham 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 0547AC433DF for ; Sun, 17 May 2020 17:18:19 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C7A3A207D4 for ; Sun, 17 May 2020 17:18:18 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=gmail.com header.i=@gmail.com header.b="d20afjeo" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726601AbgEQRSS (ORCPT ); Sun, 17 May 2020 13:18:18 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57754 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726242AbgEQRSR (ORCPT ); Sun, 17 May 2020 13:18:17 -0400 Received: from mail-pj1-x1044.google.com (mail-pj1-x1044.google.com [IPv6:2607:f8b0:4864:20::1044]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 0BD3DC061A0C for ; Sun, 17 May 2020 10:18:16 -0700 (PDT) Received: by mail-pj1-x1044.google.com with SMTP id s69so3748404pjb.4 for ; Sun, 17 May 2020 10:18:16 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:to:cc:subject:date:message-id:in-reply-to:references :in-reply-to:references; bh=RKdhnFcOC5TVG/BAO4zflTRA8bOp2S6+ekpq+ExBLDk=; b=d20afjeoaDcCfpHeGHUTrIpl5ZOUVHsA5YrjjMl7ldRUeQsxPMmfkvWvocAKBKxogQ 5cUzhFDFyFNAgSX5iFZqBi/tQ6wtOlR0mQx4LDEzsUqvaf55CX9sCGitrwlYjInRrQ/j B//ZT5N7oEoaEUZ2SV4mKx77lz27bU7lK/APvJXeH4VH5vvM47Q2zgNAJKpXksJgqIX3 V9589E3TayeEe1YZgGGfXaFT7zuGYXUU+QewUAuNNblo0JXjIxN2qoa1ZGj6noE8JUk5 U3TjZzzy/qhUI2Mz2kk8Au6hJI310MC7Xw6wRT5B25oO4taFvIcm8IqASKsaIWxEMLy0 KRBw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:in-reply-to:references; bh=RKdhnFcOC5TVG/BAO4zflTRA8bOp2S6+ekpq+ExBLDk=; b=PdjrZMAbhuodk9PyaH04ERcaVc3eJNi5PVZG9QJuUEh3RVo3/Hm5fXCh+t1CkrWn1Q t/Xum19srNAVGazo3VOZqbfMDGE6wQPeSjp5BqySgspMnU1+n8rw9+32BigKKbVuCAzS +AusAQniIhOJZ2Z5aFtUaoEwibPA3Uw7ymE+qjxXBVg+NTRyXURlJ//4rVKQpzyf0/4k mUXAbmS7+0I77g8j8qHcIle/JQ0yvdl1fQMzUv+Pd0x01tqiCQ44G+XafkMOL0Da401E +KeALIUznzs0AC8EF9qdUadesY/x/SnWXlOeNb281sx2+nGElH6vu2Du9wSLufRDvKWL DxUA== X-Gm-Message-State: AOAM5321kdCrFbgZDtBKFgdflTmq146wPp7wyr75hs2aavsDxQaPsczU GRm0bVJsiH1xv8fTS8Z1w24= X-Google-Smtp-Source: ABdhPJxGsVFmwEjNidWlik7m5mV/Tu7zIeL1vftotkNOr5jb4FUMlyranjvPMTUss3iKHk+goA968Q== X-Received: by 2002:a17:902:a58b:: with SMTP id az11mr2770987plb.172.1589735895601; Sun, 17 May 2020 10:18:15 -0700 (PDT) Received: from cvds-vagarw7.iind.intel.com (fmdmzpr03-ext.fm.intel.com. [192.55.54.38]) by smtp.googlemail.com with ESMTPSA id n69sm6513900pjc.8.2020.05.17.10.18.08 (version=TLS1_2 cipher=ECDHE-ECDSA-AES128-GCM-SHA256 bits=128/128); Sun, 17 May 2020 10:18:14 -0700 (PDT) From: Vaibhav Agarwal To: Greg Kroah-Hartman , Alex Elder , Johan Hovold , Mark Greer Cc: greybus-dev@lists.linaro.org, devel@driverdev.osuosl.org, linux-kernel@vger.kernel.org, Alexandre Belloni , Vaibhav Agarwal Subject: [PATCH V1 5/6] staging: greybus: audio: Add helper APIs for dynamic audio modules Date: Sun, 17 May 2020 22:47:20 +0530 Message-Id: X-Mailer: git-send-email 2.7.4 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Greybus Codec driver allows modules to be dynamically added and removed, which further requires updating the DAPM configurations as well. With current snd_soc architecture, dynamic audio modules is not yet supported. This patch provides helper APIs to update DAPM configurations in response to modules which are dynamically added or removed. The source is primarily based on snd_dapm.c Signed-off-by: Vaibhav Agarwal --- drivers/staging/greybus/Makefile | 2 +- drivers/staging/greybus/audio_codec.c | 13 ++- drivers/staging/greybus/audio_helper.c | 197 +++++++++++++++++++++++++++++++++ drivers/staging/greybus/audio_helper.h | 17 +++ 4 files changed, 224 insertions(+), 5 deletions(-) create mode 100644 drivers/staging/greybus/audio_helper.c create mode 100644 drivers/staging/greybus/audio_helper.h diff --git a/drivers/staging/greybus/Makefile b/drivers/staging/greybus/Makefile index 627e44f2a983..3b4b6cabff19 100644 --- a/drivers/staging/greybus/Makefile +++ b/drivers/staging/greybus/Makefile @@ -28,7 +28,7 @@ obj-$(CONFIG_GREYBUS_VIBRATOR) += gb-vibrator.o # Greybus Audio is a bunch of modules gb-audio-module-y := audio_module.o audio_topology.o -gb-audio-codec-y := audio_codec.o +gb-audio-codec-y := audio_codec.o audio_helper.o gb-audio-gb-y := audio_gb.o gb-audio-apbridgea-y := audio_apbridgea.o gb-audio-manager-y := audio_manager.o audio_manager_module.o diff --git a/drivers/staging/greybus/audio_codec.c b/drivers/staging/greybus/audio_codec.c index bbd072acda5c..866b3342515f 100644 --- a/drivers/staging/greybus/audio_codec.c +++ b/drivers/staging/greybus/audio_codec.c @@ -14,6 +14,7 @@ #include "audio_codec.h" #include "audio_apbridgea.h" #include "audio_manager.h" +#include "audio_helper.h" static struct gbaudio_codec_info *gbcodec; @@ -874,7 +875,7 @@ int gbaudio_register_module(struct gbaudio_module_info *module) /* card already instantiated, create widgets here only */ if (component->card->instantiated) { - snd_soc_dapm_link_component_dai_widgets(component->card, + gbaudio_dapm_link_component_dai_widgets(component->card, &component->dapm); #ifdef CONFIG_SND_JACK /* @@ -1004,19 +1005,23 @@ void gbaudio_unregister_module(struct gbaudio_module_info *module) if (module->dapm_routes) { dev_dbg(component->dev, "Removing %d routes\n", module->num_dapm_routes); + /* verify routes with controls are removed */ snd_soc_dapm_del_routes(&component->dapm, module->dapm_routes, module->num_dapm_routes); } if (module->controls) { dev_dbg(component->dev, "Removing %d controls\n", module->num_controls); - snd_soc_remove_codec_controls(component, module->controls, - module->num_controls); + /* release control semaphore */ + up_write(&card->controls_rwsem); + gbaudio_remove_component_controls(component, module->controls, + module->num_controls); + down_write(&card->controls_rwsem); } if (module->dapm_widgets) { dev_dbg(component->dev, "Removing %d widgets\n", module->num_dapm_widgets); - snd_soc_dapm_free_controls(&component->dapm, + gbaudio_dapm_free_controls(&component->dapm, module->dapm_widgets, module->num_dapm_widgets); } diff --git a/drivers/staging/greybus/audio_helper.c b/drivers/staging/greybus/audio_helper.c new file mode 100644 index 000000000000..e2f113a811ee --- /dev/null +++ b/drivers/staging/greybus/audio_helper.c @@ -0,0 +1,197 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Greybus Audio Sound SoC helper APIs + */ + +#include +#include +#include +#include + +#define gbaudio_dapm_for_each_direction(dir) \ + for ((dir) = SND_SOC_DAPM_DIR_IN; (dir) <= SND_SOC_DAPM_DIR_OUT; \ + (dir)++) + +static void gbaudio_dapm_link_dai_widget(struct snd_soc_dapm_widget *dai_w, + struct snd_soc_card *card) +{ + struct snd_soc_dapm_widget *w; + struct snd_soc_dapm_widget *src, *sink; + struct snd_soc_dai *dai = dai_w->priv; + + /* ...find all widgets with the same stream and link them */ + list_for_each_entry(w, &card->widgets, list) { + if (w->dapm != dai_w->dapm) + continue; + + switch (w->id) { + case snd_soc_dapm_dai_in: + case snd_soc_dapm_dai_out: + continue; + default: + break; + } + + if (!w->sname || !strstr(w->sname, dai_w->sname)) + continue; + + /* + * check if widget is already linked, + * if (w->linked) + * return; + */ + + if (dai_w->id == snd_soc_dapm_dai_in) { + src = dai_w; + sink = w; + } else { + src = w; + sink = dai_w; + } + dev_dbg(dai->dev, "%s -> %s\n", src->name, sink->name); + /* Add the DAPM path and set widget's linked status + * snd_soc_dapm_add_path(w->dapm, src, sink, NULL, NULL); + * w->linked = 1; + */ + } +} + +int gbaudio_dapm_link_component_dai_widgets(struct snd_soc_card *card, + struct snd_soc_dapm_context *dapm) +{ + struct snd_soc_dapm_widget *dai_w; + + /* For each DAI widget... */ + list_for_each_entry(dai_w, &card->widgets, list) { + if (dai_w->dapm != dapm) + continue; + switch (dai_w->id) { + case snd_soc_dapm_dai_in: + case snd_soc_dapm_dai_out: + break; + default: + continue; + } + gbaudio_dapm_link_dai_widget(dai_w, card); + } + + return 0; +} + +static void gbaudio_dapm_free_path(struct snd_soc_dapm_path *path) +{ + list_del(&path->list_node[SND_SOC_DAPM_DIR_IN]); + list_del(&path->list_node[SND_SOC_DAPM_DIR_OUT]); + list_del(&path->list_kcontrol); + list_del(&path->list); + kfree(path); +} + +static void gbaudio_dapm_free_widget(struct snd_soc_dapm_widget *w) +{ + struct snd_soc_dapm_path *p, *next_p; + enum snd_soc_dapm_direction dir; + + list_del(&w->list); + /* + * remove source and sink paths associated to this widget. + * While removing the path, remove reference to it from both + * source and sink widgets so that path is removed only once. + */ + gbaudio_dapm_for_each_direction(dir) { + snd_soc_dapm_widget_for_each_path_safe(w, dir, p, next_p) + gbaudio_dapm_free_path(p); + } + + kfree(w->kcontrols); + kfree_const(w->name); + kfree_const(w->sname); + kfree(w); +} + +int gbaudio_dapm_free_controls(struct snd_soc_dapm_context *dapm, + const struct snd_soc_dapm_widget *widget, + int num) +{ + int i; + struct snd_soc_dapm_widget *w, *next_w; +#ifdef CONFIG_DEBUG_FS + struct dentry *parent = dapm->debugfs_dapm; + struct dentry *debugfs_w = NULL; +#endif + + mutex_lock(&dapm->card->dapm_mutex); + for (i = 0; i < num; i++) { + /* below logic can be optimized to identify widget pointer */ + list_for_each_entry_safe(w, next_w, &dapm->card->widgets, + list) { + if (w->dapm != dapm) + continue; + if (!strcmp(w->name, widget->name)) + break; + w = NULL; + } + if (!w) { + dev_err(dapm->dev, "%s: widget not found\n", + widget->name); + return -EINVAL; + } + widget++; +#ifdef CONFIG_DEBUG_FS + if (!parent) + debugfs_w = debugfs_lookup(w->name, parent); + debugfs_remove(debugfs_w); + debugfs_w = NULL; +#endif + gbaudio_dapm_free_widget(w); + } + mutex_unlock(&dapm->card->dapm_mutex); + return 0; +} + +static int gbaudio_remove_controls(struct snd_card *card, struct device *dev, + const struct snd_kcontrol_new *controls, + int num_controls, const char *prefix) +{ + int i, err; + + for (i = 0; i < num_controls; i++) { + const struct snd_kcontrol_new *control = &controls[i]; + struct snd_ctl_elem_id id; + struct snd_kcontrol *kctl; + + if (prefix) + snprintf(id.name, sizeof(id.name), "%s %s", prefix, + control->name); + else + strlcpy(id.name, control->name, sizeof(id.name)); + id.numid = 0; + id.iface = control->iface; + id.device = control->device; + id.subdevice = control->subdevice; + id.index = control->index; + kctl = snd_ctl_find_id(card, &id); + if (!kctl) { + dev_err(dev, "%d: Failed to find %s\n", err, + control->name); + return -ENOENT; + } + err = snd_ctl_remove(card, kctl); + if (err < 0) { + dev_err(dev, "%d: Failed to remove %s\n", err, + control->name); + return err; + } + } + return 0; +} + +int gbaudio_remove_component_controls(struct snd_soc_component *component, + const struct snd_kcontrol_new *controls, + unsigned int num_controls) +{ + struct snd_card *card = component->card->snd_card; + + return gbaudio_remove_controls(card, component->dev, controls, + num_controls, component->name_prefix); +} diff --git a/drivers/staging/greybus/audio_helper.h b/drivers/staging/greybus/audio_helper.h new file mode 100644 index 000000000000..5cf1c6d7d3ea --- /dev/null +++ b/drivers/staging/greybus/audio_helper.h @@ -0,0 +1,17 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Greybus Audio Sound SoC helper APIs + */ + +#ifndef __LINUX_GBAUDIO_HELPER_H +#define __LINUX_GBAUDIO_HELPER_H + +int gbaudio_dapm_link_component_dai_widgets(struct snd_soc_card *card, + struct snd_soc_dapm_context *dapm); +int gbaudio_dapm_free_controls(struct snd_soc_dapm_context *dapm, + const struct snd_soc_dapm_widget *widget, + int num); +int gbaudio_remove_component_controls(struct snd_soc_component *component, + const struct snd_kcontrol_new *controls, + unsigned int num_controls); +#endif -- 2.7.4