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=-11.5 required=3.0 tests=BAYES_00,DATE_IN_PAST_06_12, 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 862BCC433E2 for ; Wed, 2 Sep 2020 03:00:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6F0D82087C for ; Wed, 2 Sep 2020 03:00:15 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726594AbgIBDAO (ORCPT ); Tue, 1 Sep 2020 23:00:14 -0400 Received: from mga06.intel.com ([134.134.136.31]:23996 "EHLO mga06.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727058AbgIBDAH (ORCPT ); Tue, 1 Sep 2020 23:00:07 -0400 IronPort-SDR: m4i8AY7znJjPmnI+IshuGySw0KNLxg/+Dt1J51lHgwoKAvtJgnpuP4/sqjJeX688KgukOBsh+C gQ6jna7nTGXQ== X-IronPort-AV: E=McAfee;i="6000,8403,9731"; a="218860119" X-IronPort-AV: E=Sophos;i="5.76,381,1592895600"; d="scan'208";a="218860119" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Sep 2020 20:00:07 -0700 IronPort-SDR: M96i8wad03eC41a30IwMqxvxvOik1H0Dma+3krLueXM9s4XH3wcCkbXmNILBVavy/CG5/wtrUe zp5Fu8A+3L0Q== X-IronPort-AV: E=Sophos;i="5.76,381,1592895600"; d="scan'208";a="283588189" Received: from bard-ubuntu.sh.intel.com ([10.239.13.33]) by fmsmga008-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Sep 2020 20:00:03 -0700 From: Bard Liao To: alsa-devel@alsa-project.org, vkoul@kernel.org Cc: vinod.koul@linaro.org, linux-kernel@vger.kernel.org, tiwai@suse.de, broonie@kernel.org, gregkh@linuxfoundation.org, jank@cadence.com, srinivas.kandagatla@linaro.org, rander.wang@linux.intel.com, ranjani.sridharan@linux.intel.com, hui.wang@canonical.com, pierre-louis.bossart@linux.intel.com, sanyog.r.kale@intel.com, mengdong.lin@intel.com, bard.liao@intel.com Subject: [PATCH v2 07/10] soundwire: stream: enable hw_sync as needed by hardware Date: Tue, 1 Sep 2020 23:05:53 +0800 Message-Id: <20200901150556.19432-8-yung-chuan.liao@linux.intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200901150556.19432-1-yung-chuan.liao@linux.intel.com> References: <20200901150556.19432-1-yung-chuan.liao@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Pierre-Louis Bossart Use platform-specific information to decide when to use hw_sync, not only a number of links > 1. Signed-off-by: Pierre-Louis Bossart Signed-off-by: Bard Liao --- drivers/soundwire/stream.c | 15 +++++++++------ 1 file changed, 9 insertions(+), 6 deletions(-) diff --git a/drivers/soundwire/stream.c b/drivers/soundwire/stream.c index 37290a799023..e4cf484f5905 100644 --- a/drivers/soundwire/stream.c +++ b/drivers/soundwire/stream.c @@ -689,9 +689,9 @@ static int sdw_bank_switch(struct sdw_bus *bus, int m_rt_count) /* * Set the multi_link flag only when both the hardware supports - * and there is a stream handled by multiple masters + * and hardware-based sync is required */ - multi_link = bus->multi_link && (m_rt_count > 1); + multi_link = bus->multi_link && (m_rt_count >= bus->hw_sync_min_links); if (multi_link) ret = sdw_transfer_defer(bus, wr_msg, &bus->defer_msg); @@ -760,13 +760,16 @@ static int do_bank_switch(struct sdw_stream_runtime *stream) const struct sdw_master_ops *ops; struct sdw_bus *bus; bool multi_link = false; + int m_rt_count; int ret = 0; + m_rt_count = stream->m_rt_count; + list_for_each_entry(m_rt, &stream->master_list, stream_node) { bus = m_rt->bus; ops = bus->ops; - if (bus->multi_link) { + if (bus->multi_link && m_rt_count >= bus->hw_sync_min_links) { multi_link = true; mutex_lock(&bus->msg_lock); } @@ -787,7 +790,7 @@ static int do_bank_switch(struct sdw_stream_runtime *stream) * synchronized across all Masters and happens later as a * part of post_bank_switch ops. */ - ret = sdw_bank_switch(bus, stream->m_rt_count); + ret = sdw_bank_switch(bus, m_rt_count); if (ret < 0) { dev_err(bus->dev, "Bank switch failed: %d\n", ret); goto error; @@ -813,7 +816,7 @@ static int do_bank_switch(struct sdw_stream_runtime *stream) ret); goto error; } - } else if (bus->multi_link && stream->m_rt_count > 1) { + } else if (multi_link) { dev_err(bus->dev, "Post bank switch ops not implemented\n"); goto error; @@ -831,7 +834,7 @@ static int do_bank_switch(struct sdw_stream_runtime *stream) goto error; } - if (bus->multi_link) + if (multi_link) mutex_unlock(&bus->msg_lock); } -- 2.17.1