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 76A58C43603 for ; Mon, 9 Dec 2019 23:56:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 5271620721 for ; Mon, 9 Dec 2019 23:56:00 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1727667AbfLIXz7 (ORCPT ); Mon, 9 Dec 2019 18:55:59 -0500 Received: from mga02.intel.com ([134.134.136.20]:13468 "EHLO mga02.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1727509AbfLIXzm (ORCPT ); Mon, 9 Dec 2019 18:55:42 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 09 Dec 2019 15:55:42 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.69,297,1571727600"; d="scan'208";a="210273679" Received: from bbower-mobl.amr.corp.intel.com (HELO pbossart-mobl3.amr.corp.intel.com) ([10.254.65.172]) by fmsmga008.fm.intel.com with ESMTP; 09 Dec 2019 15:55:40 -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 v4 08/11] soundwire: intel: add link_list to handle interrupts with a single thread Date: Mon, 9 Dec 2019 17:55:16 -0600 Message-Id: <20191209235520.18727-9-pierre-louis.bossart@linux.intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191209235520.18727-1-pierre-louis.bossart@linux.intel.com> References: <20191209235520.18727-1-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 From: Bard Liao In MSI mode, the use of separate handlers and threads for the Intel IPC, stream and SoundWire shared interrupt leads to timeouts and lost interrupts. The solution is to merge all interrupt handling across all links with a single thread function. The use of a linked list enables this thread function to walk through all contexts and figure out which link needs attention. Signed-off-by: Bard Liao Signed-off-by: Pierre-Louis Bossart --- include/linux/soundwire/sdw_intel.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/linux/soundwire/sdw_intel.h b/include/linux/soundwire/sdw_intel.h index 47b7678ca2ab..2cf92724864c 100644 --- a/include/linux/soundwire/sdw_intel.h +++ b/include/linux/soundwire/sdw_intel.h @@ -68,6 +68,7 @@ struct sdw_intel_link_res; * @handle: ACPI parent handle * @links: information for each link (controller-specific and kept * opaque here) + * @link_list: list to handle interrupts across all links */ struct sdw_intel_ctx { int count; @@ -75,6 +76,7 @@ struct sdw_intel_ctx { u32 link_mask; acpi_handle handle; struct sdw_intel_link_res *links; + struct list_head link_list; }; /** -- 2.20.1