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18 Aug 2020 07:35:39 -0700 IronPort-SDR: Nm5sXXdIiKloF9WkqN4c5PIQZLYiuslrQENHSkOpmHr6kagJ77jfHpkmRUNlSd2RYqyvt7HdB5 OZGwBLlp9tDw== X-IronPort-AV: E=Sophos;i="5.76,327,1592895600"; d="scan'208";a="471830602" Received: from bard-ubuntu.sh.intel.com ([10.239.13.33]) by orsmga005-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 18 Aug 2020 07:35:35 -0700 From: Bard Liao To: alsa-devel@alsa-project.org, vkoul@kernel.org Subject: [PATCH 06/11] soundwire: intel: add multi-link hw_synchronization information Date: Tue, 18 Aug 2020 10:41:15 +0800 Message-Id: <20200818024120.20721-7-yung-chuan.liao@linux.intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200818024120.20721-1-yung-chuan.liao@linux.intel.com> References: <20200818024120.20721-1-yung-chuan.liao@linux.intel.com> Cc: pierre-louis.bossart@linux.intel.com, vinod.koul@linaro.org, tiwai@suse.de, gregkh@linuxfoundation.org, linux-kernel@vger.kernel.org, ranjani.sridharan@linux.intel.com, hui.wang@canonical.com, broonie@kernel.org, srinivas.kandagatla@linaro.org, jank@cadence.com, mengdong.lin@intel.com, sanyog.r.kale@intel.com, rander.wang@linux.intel.com, bard.liao@intel.com 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" From: Pierre-Louis Bossart set the flags as required by hardware implementation Signed-off-by: Pierre-Louis Bossart Signed-off-by: Bard Liao --- drivers/soundwire/intel.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c index f4441684bd7e..89a8ad1f80e8 100644 --- a/drivers/soundwire/intel.c +++ b/drivers/soundwire/intel.c @@ -1400,7 +1400,14 @@ int intel_master_startup(struct platform_device *pdev) dev_dbg(dev, "Multi-link is disabled\n"); bus->multi_link = false; } else { + /* + * hardware-based synchronization is required regardless + * of the number of segments used by a stream: SSP-based + * synchronization is gated by gsync when the multi-master + * mode is set. + */ bus->multi_link = true; + bus->hw_sync_min_links = 1; } /* Initialize shim, controller */