From patchwork Tue Aug 6 00:55:19 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Pierre-Louis Bossart X-Patchwork-Id: 11078043 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 744CB17E0 for ; Tue, 6 Aug 2019 01:12:21 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 643D42897D for ; Tue, 6 Aug 2019 01:12:21 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 58C202884A; Tue, 6 Aug 2019 01:12:21 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-2.9 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_NONE autolearn=ham version=3.3.1 Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 811DD2884A for ; Tue, 6 Aug 2019 01:12:20 +0000 (UTC) Received: from alsa1.perex.cz (alsa1.perex.cz [207.180.221.201]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by alsa0.perex.cz (Postfix) with ESMTPS id BF06116B0; Tue, 6 Aug 2019 03:05:25 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa0.perex.cz BF06116B0 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=alsa-project.org; s=default; t=1565053575; bh=xN1Cn2pddpCh0iul4nUZIj0kvDlySKDsel2GAkYTp8k=; h=From:To:Date:In-Reply-To:References:Cc:Subject:List-Id: List-Unsubscribe:List-Archive:List-Post:List-Help:List-Subscribe: From; b=HA1GUfxhIbnpn9XjoiCP7OHaITsJtg7i+RS/rHYk1vv/1tIRowtLuloXCEb/FGpKg VOVSnq3B2y+EhwGO81D456IdmvN5mwHRY/B/FjEnM862iRNpMs55mr2n6gK/5jiKIE 8+NNLHz1xu3YMcIGx6F7Pgp8/EqyXUqAcvMIpwCg= Received: from alsa1.perex.cz (localhost.localdomain [127.0.0.1]) by alsa1.perex.cz (Postfix) with ESMTP id 02B34F806E9; Tue, 6 Aug 2019 02:55:57 +0200 (CEST) X-Original-To: alsa-devel@alsa-project.org Delivered-To: alsa-devel@alsa-project.org Received: by alsa1.perex.cz (Postfix, from userid 50401) id 10077F806EF; Tue, 6 Aug 2019 02:55:54 +0200 (CEST) Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by alsa1.perex.cz (Postfix) with ESMTPS id 0991FF8067A for ; Tue, 6 Aug 2019 02:55:50 +0200 (CEST) DKIM-Filter: OpenDKIM Filter v2.11.0 alsa1.perex.cz 0991FF8067A X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by fmsmga101.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 05 Aug 2019 17:55:50 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.64,350,1559545200"; d="scan'208";a="198153229" Received: from sahluwal-mobl1.amr.corp.intel.com (HELO pbossart-mobl3.intel.com) ([10.252.202.215]) by fmsmga004.fm.intel.com with ESMTP; 05 Aug 2019 17:55:49 -0700 From: Pierre-Louis Bossart To: alsa-devel@alsa-project.org Date: Mon, 5 Aug 2019 19:55:19 -0500 Message-Id: <20190806005522.22642-15-pierre-louis.bossart@linux.intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190806005522.22642-1-pierre-louis.bossart@linux.intel.com> References: <20190806005522.22642-1-pierre-louis.bossart@linux.intel.com> MIME-Version: 1.0 Cc: tiwai@suse.de, gregkh@linuxfoundation.org, Blauciak@alsa-project.org, linux-kernel@vger.kernel.org, Pierre-Louis Bossart , vkoul@kernel.org, broonie@kernel.org, srinivas.kandagatla@linaro.org, jank@cadence.com, Slawomir , Sanyog Kale Subject: [alsa-devel] [PATCH 14/17] soundwire: intel: handle disabled links 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" X-Virus-Scanned: ClamAV using ClamSMTP On most hardware platforms, SoundWire interfaces are pin-muxed with other interfaces (typically DMIC or I2S) and the status of each link needs to be checked at boot time. For Intel platforms, the BIOS provides a menu to enable/disable the links separately, and the information is provided to the OS with an Intel-specific _DSD property. The same capability will be added to revisions of the MIPI DisCo specification. Signed-off-by: Pierre-Louis Bossart --- drivers/soundwire/intel.c | 26 ++++++++++++++++++++++---- include/linux/soundwire/sdw.h | 2 ++ 2 files changed, 24 insertions(+), 4 deletions(-) diff --git a/drivers/soundwire/intel.c b/drivers/soundwire/intel.c index 3f876642cb7f..e702187c0609 100644 --- a/drivers/soundwire/intel.c +++ b/drivers/soundwire/intel.c @@ -90,6 +90,8 @@ #define SDW_ALH_STRMZCFG_DMAT GENMASK(7, 0) #define SDW_ALH_STRMZCFG_CHN GENMASK(19, 16) +#define SDW_INTEL_QUIRK_MASK_BUS_DISABLE BIT(1) + enum intel_pdi_type { INTEL_PDI_IN = 0, INTEL_PDI_OUT = 1, @@ -914,7 +916,7 @@ static int sdw_master_read_intel_prop(struct sdw_bus *bus) struct sdw_master_prop *prop = &bus->prop; struct fwnode_handle *link; char name[32]; - int nval, i; + u32 quirk_mask; /* Find master handle */ snprintf(name, sizeof(name), @@ -929,6 +931,14 @@ static int sdw_master_read_intel_prop(struct sdw_bus *bus) fwnode_property_read_u32(link, "intel-sdw-ip-clock", &prop->mclk_freq); + + fwnode_property_read_u32(link, + "intel-quirk-mask", + &quirk_mask); + + if (quirk_mask & SDW_INTEL_QUIRK_MASK_BUS_DISABLE) + prop->hw_disabled = true; + return 0; } @@ -989,6 +999,12 @@ static int intel_probe(struct platform_device *pdev) goto err_master_reg; } + if (sdw->cdns.bus.prop.hw_disabled) { + dev_info(&pdev->dev, "SoundWire master %d is disabled, ignoring\n", + sdw->cdns.bus.link_id); + return 0; + } + /* Initialize shim and controller */ intel_link_power_up(sdw); intel_shim_init(sdw); @@ -1042,9 +1058,11 @@ static int intel_remove(struct platform_device *pdev) sdw = platform_get_drvdata(pdev); - intel_debugfs_exit(sdw); - free_irq(sdw->res->irq, sdw); - snd_soc_unregister_component(sdw->cdns.dev); + if (!sdw->cdns.bus.prop.hw_disabled) { + intel_debugfs_exit(sdw); + free_irq(sdw->res->irq, sdw); + snd_soc_unregister_component(sdw->cdns.dev); + } sdw_delete_bus_master(&sdw->cdns.bus); return 0; diff --git a/include/linux/soundwire/sdw.h b/include/linux/soundwire/sdw.h index b6acc436ac80..a3c7448d5817 100644 --- a/include/linux/soundwire/sdw.h +++ b/include/linux/soundwire/sdw.h @@ -380,6 +380,7 @@ struct sdw_slave_prop { * @err_threshold: Number of times that software may retry sending a single * command * @mclk_freq: clock reference passed to SoundWire Master, in Hz. + * @hw_disabled: if true, the Master is not functional, typically due to pin-mux */ struct sdw_master_prop { u32 revision; @@ -395,6 +396,7 @@ struct sdw_master_prop { bool dynamic_frame; u32 err_threshold; u32 mclk_freq; + bool hw_disabled; }; int sdw_master_read_prop(struct sdw_bus *bus);