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=-9.8 required=3.0 tests=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 DB12BC282DD for ; Wed, 8 Jan 2020 17:55:08 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BFB362067D for ; Wed, 8 Jan 2020 17:55:08 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729990AbgAHRzH (ORCPT ); Wed, 8 Jan 2020 12:55:07 -0500 Received: from mga09.intel.com ([134.134.136.24]:41182 "EHLO mga09.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729965AbgAHRzE (ORCPT ); Wed, 8 Jan 2020 12:55:04 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga007.jf.intel.com ([10.7.209.58]) by orsmga102.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 08 Jan 2020 09:55:04 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.69,410,1571727600"; d="scan'208";a="211617401" Received: from cozturk-mobl2.amr.corp.intel.com (HELO pbossart-mobl3.amr.corp.intel.com) ([10.251.17.77]) by orsmga007.jf.intel.com with ESMTP; 08 Jan 2020 09:55:03 -0800 From: Pierre-Louis Bossart To: alsa-devel@alsa-project.org Cc: linux-kernel@vger.kernel.org, tiwai@suse.de, broonie@kernel.org, vkoul@kernel.org, gregkh@linuxfoundation.org, jank@cadence.com, srinivas.kandagatla@linaro.org, slawomir.blauciak@intel.com, Bard liao , Rander Wang , Ranjani Sridharan , Pierre-Louis Bossart , Sanyog Kale Subject: [PATCH 4/6] soundwire: stream: do not update parameters during DISABLED-PREPARED transition Date: Wed, 8 Jan 2020 11:54:36 -0600 Message-Id: <20200108175438.13121-5-pierre-louis.bossart@linux.intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20200108175438.13121-1-pierre-louis.bossart@linux.intel.com> References: <20200108175438.13121-1-pierre-louis.bossart@linux.intel.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org After a system suspend, the ALSA/ASoC core will invoke the .prepare() callback and a TRIGGER_START when INFO_RESUME is not supported. Likewise, when an underflow occurs, the .prepare callback will be invoked. In both cases, the stream can be in DISABLED mode, and will transition into the PREPARED mode. We however don't want the bus bandwidth to be recomputed. Signed-off-by: Pierre-Louis Bossart --- drivers/soundwire/stream.c | 19 +++++++++++++++++-- 1 file changed, 17 insertions(+), 2 deletions(-) diff --git a/drivers/soundwire/stream.c b/drivers/soundwire/stream.c index bd0bddf73830..c28ce7f0d742 100644 --- a/drivers/soundwire/stream.c +++ b/drivers/soundwire/stream.c @@ -1460,7 +1460,8 @@ static void sdw_release_bus_lock(struct sdw_stream_runtime *stream) } } -static int _sdw_prepare_stream(struct sdw_stream_runtime *stream) +static int _sdw_prepare_stream(struct sdw_stream_runtime *stream, + bool update_params) { struct sdw_master_runtime *m_rt; struct sdw_bus *bus = NULL; @@ -1480,6 +1481,9 @@ static int _sdw_prepare_stream(struct sdw_stream_runtime *stream) return -EINVAL; } + if (!update_params) + goto program_params; + /* Increment cumulative bus bandwidth */ /* TODO: Update this during Device-Device support */ bus->params.bandwidth += m_rt->stream->params.rate * @@ -1495,6 +1499,7 @@ static int _sdw_prepare_stream(struct sdw_stream_runtime *stream) } } +program_params: /* Program params */ ret = sdw_program_params(bus); if (ret < 0) { @@ -1544,6 +1549,7 @@ static int _sdw_prepare_stream(struct sdw_stream_runtime *stream) */ int sdw_prepare_stream(struct sdw_stream_runtime *stream) { + bool update_params = true; int ret; if (!stream) { @@ -1567,7 +1573,16 @@ int sdw_prepare_stream(struct sdw_stream_runtime *stream) goto state_err; } - ret = _sdw_prepare_stream(stream); + /* + * when the stream is DISABLED, this means sdw_prepare_stream() + * is called as a result of an underflow or a resume operation. + * In this case, the bus parameters shall not be recomputed, but + * still need to be re-applied + */ + if (stream->state == SDW_STREAM_DISABLED) + update_params = false; + + ret = _sdw_prepare_stream(stream, update_params); state_err: sdw_release_bus_lock(stream); -- 2.20.1