From patchwork Wed Jul 13 10:47:55 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Takashi Iwai X-Patchwork-Id: 590081 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id C675DCCA479 for ; Wed, 13 Jul 2022 10:49:54 +0000 (UTC) Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id 021B916FB; Wed, 13 Jul 2022 12:49:03 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz 021B916FB DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1657709393; bh=UEyk8JuDi6V/x283xrIEzuTYvfogpgRzqD9y63XFQbA=; h=From:To:Subject:Date:In-Reply-To:References:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=MNHOxWi4H7j5327EzF9S/wVB1+dHOjtvFZefUzzUEcRFt1It1AC4Zab5caS4iJfr4 2Fjod5XvPdSImw1/mtIzl5a/FQF6qT1uVAlk/eWN2xWO4AbGnn4wMlJ4b92ey8mSI1 nQAsWhz4hU5o/BJR9rKx8oCaaIumOJlZPwMSHAlc= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 34A3AF80544; Wed, 13 Jul 2022 12:48:16 +0200 (CEST) Received: by alsa1.perex.cz (Postfix, from userid 50401) id EB880F8054A; Wed, 13 Jul 2022 12:48:14 +0200 (CEST) Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.220.29]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id 525B4F80249 for ; Wed, 13 Jul 2022 12:48:06 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 525B4F80249 Authentication-Results: alsa1.perex.cz; dkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de header.b="tgrIS4Vv"; dkim=permerror (0-bit key) header.d=suse.de header.i=@suse.de header.b="EtrbJFpj" Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id A9F921FF8A; Wed, 13 Jul 2022 10:48:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1657709286; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=AmjIkuBX+i+NgsG8xs2kb1yrkedswGeklfJm2ndQK78=; b=tgrIS4Vv9TdnGDj2M3gbR6ajQ6gHGfB/DhYNgBoNmcll5AYDbVnU/4HAM4TvbhRrZXH75P N2gxEmiZGuSXDpYSdI7aIWP3EH45UcEroY5tG+c+23TkBqGMh0jscTFTqGxJgwpeBW7SH1 H287Ge+tvX2p691KkXeZ+Or1I7CNVrs= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1657709286; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=AmjIkuBX+i+NgsG8xs2kb1yrkedswGeklfJm2ndQK78=; b=EtrbJFpjaOaX11Ea5nrCRB2WQINh6Nlh5hXoobIJgqnruik4dIr1BNq08J0gXerGhutpFf MlOjkKTB6N53IdDg== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 8FD6713AC7; Wed, 13 Jul 2022 10:48:06 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id qAVnIuaizmLceAAAMHmgww (envelope-from ); Wed, 13 Jul 2022 10:48:06 +0000 From: Takashi Iwai To: alsa-devel@alsa-project.org Subject: [PATCH 3/7] ALSA: dmaengine: Fix missing return value comments for kernel docs Date: Wed, 13 Jul 2022 12:47:55 +0200 Message-Id: <20220713104759.4365-4-tiwai@suse.de> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20220713104759.4365-1-tiwai@suse.de> References: <20220713104759.4365-1-tiwai@suse.de> MIME-Version: 1.0 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" Each kernel doc comment expects the definition of the return value in a proper format. This patch adds or fixes the missing entries for PCM dmaengine API. Signed-off-by: Takashi Iwai --- include/sound/dmaengine_pcm.h | 2 ++ sound/core/pcm_dmaengine.c | 30 ++++++++++++++++++++---------- 2 files changed, 22 insertions(+), 10 deletions(-) diff --git a/include/sound/dmaengine_pcm.h b/include/sound/dmaengine_pcm.h index 38ea046e653c..2df54cf02cb3 100644 --- a/include/sound/dmaengine_pcm.h +++ b/include/sound/dmaengine_pcm.h @@ -15,6 +15,8 @@ * snd_pcm_substream_to_dma_direction - Get dma_transfer_direction for a PCM * substream * @substream: PCM substream + * + * Return: DMA transfer direction */ static inline enum dma_transfer_direction snd_pcm_substream_to_dma_direction(const struct snd_pcm_substream *substream) diff --git a/sound/core/pcm_dmaengine.c b/sound/core/pcm_dmaengine.c index af6f717e1e7e..5b2ca028f5aa 100644 --- a/sound/core/pcm_dmaengine.c +++ b/sound/core/pcm_dmaengine.c @@ -48,6 +48,8 @@ EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_get_chan); * * This function can be used to initialize a dma_slave_config from a substream * and hw_params in a dmaengine based PCM driver implementation. + * + * Return: zero if successful, or a negative error code */ int snd_hwparams_to_dma_slave_config(const struct snd_pcm_substream *substream, const struct snd_pcm_hw_params *params, @@ -175,10 +177,10 @@ static int dmaengine_pcm_prepare_and_submit(struct snd_pcm_substream *substream) * @substream: PCM substream * @cmd: Trigger command * - * Returns 0 on success, a negative error code otherwise. - * * This function can be used as the PCM trigger callback for dmaengine based PCM * driver implementations. + * + * Return: 0 on success, a negative error code otherwise */ int snd_dmaengine_pcm_trigger(struct snd_pcm_substream *substream, int cmd) { @@ -223,6 +225,8 @@ EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_trigger); * * This function is deprecated and should not be used by new drivers, as its * results may be unreliable. + * + * Return: PCM position in frames */ snd_pcm_uframes_t snd_dmaengine_pcm_pointer_no_residue(struct snd_pcm_substream *substream) { @@ -237,6 +241,8 @@ EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_pointer_no_residue); * * This function can be used as the PCM pointer callback for dmaengine based PCM * driver implementations. + * + * Return: PCM position in frames */ snd_pcm_uframes_t snd_dmaengine_pcm_pointer(struct snd_pcm_substream *substream) { @@ -266,9 +272,9 @@ EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_pointer); * @filter_fn: Filter function used to request the DMA channel * @filter_data: Data passed to the DMA filter function * - * Returns NULL or the requested DMA channel. - * * This function request a DMA channel for usage with dmaengine PCM. + * + * Return: NULL or the requested DMA channel */ struct dma_chan *snd_dmaengine_pcm_request_channel(dma_filter_fn filter_fn, void *filter_data) @@ -288,11 +294,11 @@ EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_request_channel); * @substream: PCM substream * @chan: DMA channel to use for data transfers * - * Returns 0 on success, a negative error code otherwise. - * * The function should usually be called from the pcm open callback. Note that * this function will use private_data field of the substream's runtime. So it * is not available to your pcm driver implementation. + * + * Return: 0 on success, a negative error code otherwise */ int snd_dmaengine_pcm_open(struct snd_pcm_substream *substream, struct dma_chan *chan) @@ -326,12 +332,12 @@ EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_open); * @filter_fn: Filter function used to request the DMA channel * @filter_data: Data passed to the DMA filter function * - * Returns 0 on success, a negative error code otherwise. - * * This function will request a DMA channel using the passed filter function and * data. The function should usually be called from the pcm open callback. Note * that this function will use private_data field of the substream's runtime. So * it is not available to your pcm driver implementation. + * + * Return: 0 on success, a negative error code otherwise */ int snd_dmaengine_pcm_open_request_chan(struct snd_pcm_substream *substream, dma_filter_fn filter_fn, void *filter_data) @@ -344,6 +350,8 @@ EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_open_request_chan); /** * snd_dmaengine_pcm_close - Close a dmaengine based PCM substream * @substream: PCM substream + * + * Return: 0 on success, a negative error code otherwise */ int snd_dmaengine_pcm_close(struct snd_pcm_substream *substream) { @@ -362,6 +370,8 @@ EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_close); * @substream: PCM substream * * Releases the DMA channel associated with the PCM substream. + * + * Return: zero if successful, or a negative error code */ int snd_dmaengine_pcm_close_release_chan(struct snd_pcm_substream *substream) { @@ -382,10 +392,10 @@ EXPORT_SYMBOL_GPL(snd_dmaengine_pcm_close_release_chan); * @hw: PCM hw params * @chan: DMA channel to use for data transfers * - * Returns 0 on success, a negative error code otherwise. - * * This function will query DMA capability, then refine the pcm hardware * parameters. + * + * Return: 0 on success, a negative error code otherwise */ int snd_dmaengine_pcm_refine_runtime_hwparams( struct snd_pcm_substream *substream,