From patchwork Sat Aug 8 16:10:21 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Russell King X-Patchwork-Id: 6975141 Return-Path: X-Original-To: patchwork-dri-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 87B9DC05AC for ; Sat, 8 Aug 2015 16:10:48 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id AEA5C2053D for ; Sat, 8 Aug 2015 16:10:47 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id E6B8E2053C for ; Sat, 8 Aug 2015 16:10:46 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 55CE76E560; Sat, 8 Aug 2015 09:10:46 -0700 (PDT) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from pandora.arm.linux.org.uk (pandora.arm.linux.org.uk [78.32.30.218]) by gabe.freedesktop.org (Postfix) with ESMTPS id 9249C6E560 for ; Sat, 8 Aug 2015 09:10:44 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=arm.linux.org.uk; s=pandora-2014; h=Date:Sender:Message-Id:Content-Type:Content-Transfer-Encoding:MIME-Version:Subject:Cc:To:From:References:In-Reply-To; bh=+EKQJy04qgSr8wi5HsohTszKOjYhL95/+Onpgp6qkmE=; b=RogFnf7ZwwPKWg/TNc+m+TWleTFustewJEV4SSQsll5COqPa1F26O4S/R69m8aUZ8m6VyzmO41yPEtGT4ROpouOcDBgPpHws5ewDZLaaDYUOM7TwX0OrbCaS8o7T6bunSXRIepBYPMs1P1ArHOOkQGTRDp/P5UW+0zUH7re8Ink=; Received: from e0022681537dd.dyn.arm.linux.org.uk ([2002:4e20:1eda:1:222:68ff:fe15:37dd]:49571 helo=rmk-PC.arm.linux.org.uk) by pandora.arm.linux.org.uk with esmtpsa (TLSv1:AES128-SHA:128) (Exim 4.82_1-5b7a7c0-XX) (envelope-from ) id 1ZO6hX-0006Sx-0J; Sat, 08 Aug 2015 17:10:27 +0100 Received: from rmk by rmk-PC.arm.linux.org.uk with local (Exim 4.82_1-5b7a7c0-XX) (envelope-from ) id 1ZO6hR-0003NE-Rq; Sat, 08 Aug 2015 17:10:21 +0100 In-Reply-To: <20150808160936.GN7557@n2100.arm.linux.org.uk> References: <20150808160936.GN7557@n2100.arm.linux.org.uk> From: Russell King To: linux-rockchip@lists.infradead.org, alsa-devel@alsa-project.org, dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org Subject: [PATCH 4/9] drm: bridge/dw_hdmi-ahb-audio: allow larger buffer sizes MIME-Version: 1.0 Content-Disposition: inline Message-Id: Date: Sat, 08 Aug 2015 17:10:21 +0100 Cc: Fabio Estevam , Jaroslav Kysela , Mark Brown , Yakir Yang , Andy Yan X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Spam-Status: No, score=-4.5 required=5.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_MED,RP_MATCHES_RCVD,T_DKIM_INVALID,UNPARSEABLE_RELAY autolearn=ham version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP With multichannel audio, we need to allow larger buffer sizes to avoid XRUNs during playback. Push the buffer size up to 1024K, but as we maintain two buffers, ensure that the vmalloc buffer does not exceed the userspace buffer size. Signed-off-by: Russell King --- drivers/gpu/drm/bridge/dw_hdmi-ahb-audio.c | 19 ++++++++++++++++--- 1 file changed, 16 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/bridge/dw_hdmi-ahb-audio.c b/drivers/gpu/drm/bridge/dw_hdmi-ahb-audio.c index 3a8f32e04b63..4b537f9ce8f0 100644 --- a/drivers/gpu/drm/bridge/dw_hdmi-ahb-audio.c +++ b/drivers/gpu/drm/bridge/dw_hdmi-ahb-audio.c @@ -312,7 +312,7 @@ static struct snd_pcm_hardware dw_hdmi_hw = { SNDRV_PCM_RATE_192000, .channels_min = 2, .channels_max = 8, - .buffer_bytes_max = 64 * 1024, + .buffer_bytes_max = 1024 * 1024, .period_bytes_min = 256, .period_bytes_max = 8192, /* ERR004323: must limit to 8k */ .periods_min = 2, @@ -337,7 +337,15 @@ static int dw_hdmi_open(struct snd_pcm_substream *substream) if (ret < 0) return ret; - ret = snd_pcm_hw_constraint_integer(runtime, SNDRV_PCM_HW_PARAM_PERIODS); + ret = snd_pcm_hw_constraint_integer(runtime, + SNDRV_PCM_HW_PARAM_PERIODS); + if (ret < 0) + return ret; + + /* Limit the buffer size to the size of the preallocated buffer */ + ret = snd_pcm_hw_constraint_minmax(runtime, + SNDRV_PCM_HW_PARAM_BUFFER_SIZE, + 0, substream->dma_buffer.bytes); if (ret < 0) return ret; @@ -387,6 +395,7 @@ static int dw_hdmi_hw_free(struct snd_pcm_substream *substream) static int dw_hdmi_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params) { + /* Allocate the PCM runtime buffer, which is exposed to userspace. */ return snd_pcm_lib_alloc_vmalloc_buffer(substream, params_buffer_bytes(params)); } @@ -552,8 +561,12 @@ static int snd_dw_hdmi_probe(struct platform_device *pdev) strlcpy(pcm->name, DRIVER_NAME, sizeof(pcm->name)); snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &snd_dw_hdmi_ops); + /* + * To support 8-channel 96kHz audio reliably, we need 512k + * to satisfy alsa with our restricted period (ERR004323). + */ snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV, - dev, 64 * 1024, 64 * 1024); + dev, 128 * 1024, 1024 * 1024); ret = snd_card_register(card); if (ret < 0)