From patchwork Thu Mar 20 05:01:06 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Lin, Mengdong" X-Patchwork-Id: 3863331 Return-Path: X-Original-To: patchwork-alsa-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id CD1EABF540 for ; Thu, 20 Mar 2014 05:01:42 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 2C6B620218 for ; Thu, 20 Mar 2014 05:01:38 +0000 (UTC) Received: from alsa0.perex.cz (alsa0.perex.cz [77.48.224.243]) by mail.kernel.org (Postfix) with ESMTP id 1A6C5201FA for ; Thu, 20 Mar 2014 05:01:36 +0000 (UTC) Received: by alsa0.perex.cz (Postfix, from userid 1000) id CDE3C26520A; Thu, 20 Mar 2014 06:01:33 +0100 (CET) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-1.9 required=5.0 tests=BAYES_00, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 Received: from alsa0.perex.cz (localhost [IPv6:::1]) by alsa0.perex.cz (Postfix) with ESMTP id 8C6012651D8; Thu, 20 Mar 2014 06:01:28 +0100 (CET) X-Original-To: alsa-devel@alsa-project.org Delivered-To: alsa-devel@alsa-project.org Received: by alsa0.perex.cz (Postfix, from userid 1000) id 1BEA82651EB; Thu, 20 Mar 2014 06:01:27 +0100 (CET) Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by alsa0.perex.cz (Postfix) with ESMTP id 188592651B2 for ; Thu, 20 Mar 2014 06:01:19 +0100 (CET) Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga102.jf.intel.com with ESMTP; 19 Mar 2014 21:56:44 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="4.97,692,1389772800"; d="scan'208";a="476149974" Received: from amanda-hsw-pc.sh.intel.com ([10.239.37.140]) by orsmga001.jf.intel.com with ESMTP; 19 Mar 2014 22:00:47 -0700 From: mengdong.lin@intel.com To: alsa-devel@alsa-project.org, tiwai@suse.de Date: Thu, 20 Mar 2014 13:01:06 +0800 Message-Id: X-Mailer: git-send-email 1.8.1.2 In-Reply-To: References: Cc: Mengdong Lin Subject: [alsa-devel] [PATCH v2] ALSA: hda - verify pin:cvt connection on preparing a stream for Intel HDMI codec X-BeenThere: alsa-devel@alsa-project.org X-Mailman-Version: 2.1.14 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: , MIME-Version: 1.0 Errors-To: alsa-devel-bounces@alsa-project.org Sender: alsa-devel-bounces@alsa-project.org X-Virus-Scanned: ClamAV using ClamSMTP From: Mengdong Lin This is a temporary fix for some Intel HDMI codecs to avoid no sound output for a resuming playback after S3. After S3, the audio driver restores pin:cvt connection selections by snd_hda_codec_resume_cache(). However this can happen before the gfx side is ready and such connect selection is overlooked by HW. After gfx is ready, the pins make the default selection again. And this will cause multiple pins share a same convertor and mute control will affect each other. Thus a resumed audio playback become silent after S3. This patch verifies pin:cvt connection on preparing a stream, to assure the pin selects the right convetor and an assigned convertor is not shared by other unused pins. Apply this fix-up on Haswell, Broadwell and Valleyview (Baytrail). We need this temporary fix before a reliable software communication channel is established between audio and gfx, to sync audio/gfx operations. Signed-off-by: Mengdong Lin diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c index 3ab7063..585c271 100644 --- a/sound/pci/hda/patch_hdmi.c +++ b/sound/pci/hda/patch_hdmi.c @@ -68,6 +68,7 @@ struct hdmi_spec_per_pin { hda_nid_t pin_nid; int num_mux_nids; hda_nid_t mux_nids[HDA_MAX_CONNECTIONS]; + int mux_idx; hda_nid_t cvt_nid; struct hda_codec *codec; @@ -1342,6 +1343,8 @@ static int hdmi_choose_cvt(struct hda_codec *codec, if (cvt_idx == spec->num_cvts) return -ENODEV; + per_pin->mux_idx = mux_idx; + if (cvt_id) *cvt_id = cvt_idx; if (mux_id) @@ -1350,6 +1353,22 @@ static int hdmi_choose_cvt(struct hda_codec *codec, return 0; } +/* Assure the pin select the right convetor */ +static void intel_verify_pin_cvt_connect(struct hda_codec *codec, + struct hdmi_spec_per_pin *per_pin) +{ + hda_nid_t pin_nid = per_pin->pin_nid; + int mux_idx, curr; + + mux_idx = per_pin->mux_idx; + curr = snd_hda_codec_read(codec, pin_nid, 0, + AC_VERB_GET_CONNECT_SEL, 0); + if (curr != mux_idx) + snd_hda_codec_write_cache(codec, pin_nid, 0, + AC_VERB_SET_CONNECT_SEL, + mux_idx); +} + /* Intel HDMI workaround to fix audio routing issue: * For some Intel display codecs, pins share the same connection list. * So a conveter can be selected by multiple pins and playback on any of these @@ -1751,6 +1770,19 @@ static int generic_hdmi_playback_pcm_prepare(struct hda_pcm_stream *hinfo, bool non_pcm; int pinctl; + if (is_haswell_plus(codec) || is_valleyview(codec)) { + /* Verify pin:cvt selections to avoid silent audio after S3. + * After S3, the audio driver restores pin:cvt selections + * but this can happen before gfx is ready and such selection + * is overlooked by HW. Thus multiple pins can share a same + * default convertor and mute control will affect each other, + * which can cause a resumed audio playback become silent + * after S3. + */ + intel_verify_pin_cvt_connect(codec, per_pin); + intel_not_share_assigned_cvt(codec, pin_nid, per_pin->mux_idx); + } + non_pcm = check_non_pcm_per_cvt(codec, cvt_nid); mutex_lock(&per_pin->lock); per_pin->channels = substream->runtime->channels;