From patchwork Thu Sep 23 10:50:46 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sugar Zhang X-Patchwork-Id: 12512405 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=-18.2 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_GIT autolearn=unavailable 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 A23C5C433F5 for ; Thu, 23 Sep 2021 10:51:11 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 32C3960F21 for ; Thu, 23 Sep 2021 10:51:11 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 32C3960F21 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=rock-chips.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:List-Subscribe:List-Help: List-Post:List-Archive:List-Unsubscribe:List-Id:Message-Id:Date:Subject:Cc:To :From:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:In-Reply-To:References: List-Owner; bh=QXWn5FFEphNnIg1SNT332kUoGcY4NcgR6cdyo+WWDPA=; b=oAI7aOIzhwc1j5 T1JfWLUorVnX9Nct4TtOW9TOMJgLrxx/umXvbTF1lbfX4lmVbeBkQICKxocNHn5O0+/TM8pEMY3iO iwzYuhHXcyWbYrLM9LctqmY9VHqmTux8MJ7t3REI5tZQAIYDpnvxU5hF4HH4M0n9fvegjJHfl1/7I AINU1e1ALrFcOnHSfW3MsrxvoTCHjm4DVV50I5tKKQ5benzbNKKP+670LqlVEa6sPMnv5nGTEeGMW UU2EOl8JQPZw5hYjF29JgMv8PfvuJ3nA/u0XXf55jSNr1Bui6IyIhKssrVl/aFMnOqiTH2ir6exrj pVEtbmJa25MDKj2BYDoQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mTMJm-00B1CK-Rd; Thu, 23 Sep 2021 10:51:06 +0000 Received: from lucky1.263xmail.com ([211.157.147.130]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mTMJi-00B18Z-E0 for linux-rockchip@lists.infradead.org; Thu, 23 Sep 2021 10:51:05 +0000 Received: from localhost (unknown [192.168.167.16]) by lucky1.263xmail.com (Postfix) with ESMTP id D2885D8002; Thu, 23 Sep 2021 18:50:53 +0800 (CST) X-MAIL-GRAY: 0 X-MAIL-DELIVERY: 1 X-ADDR-CHECKED4: 1 X-SKE-CHECKED: 1 X-ANTISPAM-LEVEL: 2 Received: from localhost.localdomain (unknown [58.22.7.114]) by smtp.263.net (postfix) whith ESMTP id P30982T140487228909312S1632394252895090_; Thu, 23 Sep 2021 18:50:54 +0800 (CST) X-IP-DOMAINF: 1 X-RL-SENDER: sugar.zhang@rock-chips.com X-SENDER: zxg@rock-chips.com X-LOGIN-NAME: sugar.zhang@rock-chips.com X-FST-TO: broonie@kernel.org X-RCPT-COUNT: 12 X-LOCAL-RCPT-COUNT: 1 X-SENDER-IP: 58.22.7.114 X-ATTACHMENT-NUM: 0 X-UNIQUE-TAG: <0073ee5634e02cce322910e426978038> X-System-Flag: 0 From: Sugar Zhang To: broonie@kernel.org, heiko@sntech.de Cc: linux-rockchip@lists.infradead.org, Sugar Zhang , Jaroslav Kysela , Takashi Iwai , Jonathan Corbet , Lars-Peter Clausen , Liam Girdwood , alsa-devel@alsa-project.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH] ASoC: dmaengine: Introduce module option prealloc_buffer_size_kbytes Date: Thu, 23 Sep 2021 18:50:46 +0800 Message-Id: <1632394246-59341-1-git-send-email-sugar.zhang@rock-chips.com> X-Mailer: git-send-email 2.7.4 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20210923_035102_751973_25345BFC X-CRM114-Status: GOOD ( 13.22 ) X-BeenThere: linux-rockchip@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: Upstream kernel work for Rockchip platforms List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Sender: "Linux-rockchip" Errors-To: linux-rockchip-bounces+linux-rockchip=archiver.kernel.org@lists.infradead.org Currently, The fixed 512KB prealloc buffer size is too larger for tiny memory kernel (such as 16MB memory). This patch adds the module option "prealloc_buffer_size_kbytes" to specify prealloc buffer size. It's suitable for cards which use the generic dmaengine pcm driver with no config. Signed-off-by: Sugar Zhang --- Documentation/sound/alsa-configuration.rst | 9 +++++++++ sound/soc/soc-generic-dmaengine-pcm.c | 6 +++++- 2 files changed, 14 insertions(+), 1 deletion(-) diff --git a/Documentation/sound/alsa-configuration.rst b/Documentation/sound/alsa-configuration.rst index 65f6169..34888d4 100644 --- a/Documentation/sound/alsa-configuration.rst +++ b/Documentation/sound/alsa-configuration.rst @@ -100,6 +100,15 @@ amidi_map MIDI device number maps assigned to the 2st OSS device; Default: 1 +Module snd-soc-core +------------------- + +The soc core module. It is used by all ALSA card drivers. +It takes the following options which have global effects. + +prealloc_buffer_size_kbytes + Specify prealloc buffer size in kbytes (default: 512). + Common parameters for top sound card modules -------------------------------------------- diff --git a/sound/soc/soc-generic-dmaengine-pcm.c b/sound/soc/soc-generic-dmaengine-pcm.c index 4aa48c7..c54c8ca 100644 --- a/sound/soc/soc-generic-dmaengine-pcm.c +++ b/sound/soc/soc-generic-dmaengine-pcm.c @@ -15,6 +15,10 @@ #include +static unsigned int prealloc_buffer_size_kbytes = 512; +module_param(prealloc_buffer_size_kbytes, uint, 0444); +MODULE_PARM_DESC(prealloc_buffer_size_kbytes, "Preallocate DMA buffer size (KB)."); + /* * The platforms dmaengine driver does not support reporting the amount of * bytes that are still left to transfer. @@ -237,7 +241,7 @@ static int dmaengine_pcm_new(struct snd_soc_component *component, prealloc_buffer_size = config->prealloc_buffer_size; max_buffer_size = config->pcm_hardware->buffer_bytes_max; } else { - prealloc_buffer_size = 512 * 1024; + prealloc_buffer_size = prealloc_buffer_size_kbytes * 1024; max_buffer_size = SIZE_MAX; }