From patchwork Mon Jun 28 18:11:17 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thierry Reding X-Patchwork-Id: 468070 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=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, 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 3843BC11F65 for ; Mon, 28 Jun 2021 18:09:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 117A461C79 for ; Mon, 28 Jun 2021 18:09:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232919AbhF1SLl (ORCPT ); Mon, 28 Jun 2021 14:11:41 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:57456 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231950AbhF1SLk (ORCPT ); Mon, 28 Jun 2021 14:11:40 -0400 Received: from mail-wm1-x331.google.com (mail-wm1-x331.google.com [IPv6:2a00:1450:4864:20::331]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D89D3C061574; Mon, 28 Jun 2021 11:09:13 -0700 (PDT) Received: by mail-wm1-x331.google.com with SMTP id o35-20020a05600c5123b02901e6a7a3266cso617455wms.1; Mon, 28 Jun 2021 11:09:13 -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 :mime-version:content-transfer-encoding; bh=7cXvDI8Kzqpcqy3dBcYOT9+SxskkDGP9OBiIpKbc+vw=; b=VzxGxsECFusZYeydLXp3kGqX1kEeuRJ7P2YVsTKQsEiydF716gM2ynykirBFKoaGED 3lOA641YG8eqvsQN3oh6RfKGZ0/Ficce7v1w0ZNPY6Wq2iBB47gBe+UHyZatmOo7O9sD QvOO5AmcPh/mJMCzCcTkBjQhmvvjMXO+aJCEgSCIZ+O9ERtnYxFMFKYpfet3LsHh5y5g rGIi/y42VvVKwmf7Ai7l/bu11nMjVb3Huled2MEugk5kcd9O84U9XRr+T1r4cj2JALel KyMyPUOf+h2dW+OsCatNKSOsZsIjVLlR21DbyxuygkG9qidZF1L4z7xAhXRjh7qh8pPs 8swQ== 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:mime-version:content-transfer-encoding; bh=7cXvDI8Kzqpcqy3dBcYOT9+SxskkDGP9OBiIpKbc+vw=; b=pWNKWjjoE67ZYyXYSUMcO4BPFGaxFZEEl+qVpmIhetyhG9c0J6oAamwJDPvjf3rx6D 4GlSbJY+tfKQvcUaQiTBV3XetgGCh+O6h3UR9+hqE+PscGdLUzdAe4cMkfbxIVjf6NTb xXYaWXdykW1zMH31vHzCZmEbUhdvqSoUiv077VXtOJA1NrG38dk0carL6c2Sk3A0hGJS 28PdFmMxuDs5jC789psjBYj3+H7jdNZ3JUxThFs98Ib2KKzwC71BngCvJcQ4K+/It9M9 pcUADslg4CJHgqrxFDla6HWWbmBx8Ps94ffFoOD4dLIcqYagg0+qJ6Ur/IjkQpASrZl/ lMcg== X-Gm-Message-State: AOAM533Jp+XWJgshBQpj6IMU694cEcbSLz+K8hsWXV4e4YMJPXNPS04D KObkZE2O477Qu3nxXnGQ6Kc= X-Google-Smtp-Source: ABdhPJxGfuPsUAde8SSnlWeeLPCBE0PsAoaICKAart/xt6DmvZRurJux+PMaWqH81mTbQHk0Oi8cSQ== X-Received: by 2002:a1c:7402:: with SMTP id p2mr27595934wmc.88.1624903752551; Mon, 28 Jun 2021 11:09:12 -0700 (PDT) Received: from localhost ([62.96.65.119]) by smtp.gmail.com with ESMTPSA id x17sm3796487wrn.62.2021.06.28.11.09.11 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 28 Jun 2021 11:09:11 -0700 (PDT) From: Thierry Reding To: Thierry Reding , Liam Girdwood , Mark Brown Cc: Rob Herring , Jon Hunter , Sameer Pujar , linux-tegra@vger.kernel.org, alsa-devel@alsa-project.org, devicetree@vger.kernel.org Subject: [PATCH 1/2] ASoC: tegra: Use ADMAIF component for DMA allocations Date: Mon, 28 Jun 2021 20:11:17 +0200 Message-Id: <20210628181118.2295007-2-thierry.reding@gmail.com> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20210628181118.2295007-1-thierry.reding@gmail.com> References: <20210628181118.2295007-1-thierry.reding@gmail.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org From: Thierry Reding DMA memory is currently allocated for the soundcard device, which is a virtual device added for the sole purpose of "stitching" together the audio device. It is not a real device and therefore doesn't have a DMA mask or a description of the path to and from memory of accesses. Memory accesses really originate from the ADMA controller that provides the DMA channels used by the PCM component. However, since the DMA memory is allocated up-front and the DMA channels aren't known at that point, there is no way of knowing the DMA channel provider at allocation time. The next best physical device in the memory path is the ADMAIF. Use it as the device to allocate DMA memory to. iommus and interconnects device tree properties can thus be added to the ADMAIF device tree node to describe the memory access path for audio. Signed-off-by: Thierry Reding --- sound/soc/tegra/tegra_pcm.c | 21 +++++++++------------ 1 file changed, 9 insertions(+), 12 deletions(-) diff --git a/sound/soc/tegra/tegra_pcm.c b/sound/soc/tegra/tegra_pcm.c index 573374b89b10..33bdbdfb24ba 100644 --- a/sound/soc/tegra/tegra_pcm.c +++ b/sound/soc/tegra/tegra_pcm.c @@ -213,19 +213,19 @@ snd_pcm_uframes_t tegra_pcm_pointer(struct snd_soc_component *component, } EXPORT_SYMBOL_GPL(tegra_pcm_pointer); -static int tegra_pcm_preallocate_dma_buffer(struct snd_pcm *pcm, int stream, +static int tegra_pcm_preallocate_dma_buffer(struct device *dev, struct snd_pcm *pcm, int stream, size_t size) { struct snd_pcm_substream *substream = pcm->streams[stream].substream; struct snd_dma_buffer *buf = &substream->dma_buffer; - buf->area = dma_alloc_wc(pcm->card->dev, size, &buf->addr, GFP_KERNEL); + buf->area = dma_alloc_wc(dev, size, &buf->addr, GFP_KERNEL); if (!buf->area) return -ENOMEM; buf->private_data = NULL; buf->dev.type = SNDRV_DMA_TYPE_DEV; - buf->dev.dev = pcm->card->dev; + buf->dev.dev = dev; buf->bytes = size; return 0; @@ -244,31 +244,28 @@ static void tegra_pcm_deallocate_dma_buffer(struct snd_pcm *pcm, int stream) if (!buf->area) return; - dma_free_wc(pcm->card->dev, buf->bytes, buf->area, buf->addr); + dma_free_wc(buf->dev.dev, buf->bytes, buf->area, buf->addr); buf->area = NULL; } -static int tegra_pcm_dma_allocate(struct snd_soc_pcm_runtime *rtd, +static int tegra_pcm_dma_allocate(struct device *dev, struct snd_soc_pcm_runtime *rtd, size_t size) { - struct snd_card *card = rtd->card->snd_card; struct snd_pcm *pcm = rtd->pcm; int ret; - ret = dma_set_mask_and_coherent(card->dev, DMA_BIT_MASK(32)); + ret = dma_set_mask_and_coherent(dev, DMA_BIT_MASK(32)); if (ret < 0) return ret; if (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream) { - ret = tegra_pcm_preallocate_dma_buffer(pcm, - SNDRV_PCM_STREAM_PLAYBACK, size); + ret = tegra_pcm_preallocate_dma_buffer(dev, pcm, SNDRV_PCM_STREAM_PLAYBACK, size); if (ret) goto err; } if (pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream) { - ret = tegra_pcm_preallocate_dma_buffer(pcm, - SNDRV_PCM_STREAM_CAPTURE, size); + ret = tegra_pcm_preallocate_dma_buffer(dev, pcm, SNDRV_PCM_STREAM_CAPTURE, size); if (ret) goto err_free_play; } @@ -284,7 +281,7 @@ static int tegra_pcm_dma_allocate(struct snd_soc_pcm_runtime *rtd, int tegra_pcm_construct(struct snd_soc_component *component, struct snd_soc_pcm_runtime *rtd) { - return tegra_pcm_dma_allocate(rtd, tegra_pcm_hardware.buffer_bytes_max); + return tegra_pcm_dma_allocate(component->dev, rtd, tegra_pcm_hardware.buffer_bytes_max); } EXPORT_SYMBOL_GPL(tegra_pcm_construct);