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=-10.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,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 A3596C43603 for ; Tue, 10 Dec 2019 21:34:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 747EB22464 for ; Tue, 10 Dec 2019 21:34:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576013652; bh=UtT9m3SV8Nl59iqRpAiuZx2MjM2XWgzYpBKXjgJDrGE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=SELAnerHwUu367vS1M71BHWfMg6y0kx3UDNXb4dLVFG48ym0siuh/ofO1Df+iV6sR EpjDTSRn6TZs6O8tygHQQTceRSHD/rwx6hRwyj/pgs/DLGl5fHS6s83QTNvyBCMrHY DUUP0nULOcgdn8IBy2wSkigIk1Ox4FYJkHhSI/eM= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729965AbfLJVeL (ORCPT ); Tue, 10 Dec 2019 16:34:11 -0500 Received: from mail.kernel.org ([198.145.29.99]:38988 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729942AbfLJVeH (ORCPT ); Tue, 10 Dec 2019 16:34:07 -0500 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 3F78A208C3; Tue, 10 Dec 2019 21:34:06 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1576013647; bh=UtT9m3SV8Nl59iqRpAiuZx2MjM2XWgzYpBKXjgJDrGE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=aOXol1qYm96HQn7dHnGAkEeUZf7pHc0EPlZSChHW0KyK2NaJWq1SP2bUwW8W5pFQD 90wbuNTSO46XBIex7j16+1n1pOJW7j2iLURh3lext2EEIEku1GCdj4mMovAle8QCrE Grj70pgD7QDg7O+Sy9puKWzkVHf7D0SlxbZxg6lU= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Kai Vehmanen , Takashi Iwai , Pierre-Louis Bossart , Mark Brown , Sasha Levin , alsa-devel@alsa-project.org Subject: [PATCH AUTOSEL 4.19 086/177] ALSA: hda/hdmi - implement mst_no_extra_pcms flag Date: Tue, 10 Dec 2019 16:30:50 -0500 Message-Id: <20191210213221.11921-86-sashal@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20191210213221.11921-1-sashal@kernel.org> References: <20191210213221.11921-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Kai Vehmanen [ Upstream commit 2a2edfbbfee47947dd05f5860c66c0e80ee5e09d ] To support the DP-MST multiple streams via single connector feature, the HDMI driver was extended with the concept of backup PCMs. See commit 9152085defb6 ("ALSA: hda - add DP MST audio support"). This implementation works fine with snd_hda_intel.c as PCM topology is fully managed within the single driver. When the HDA codec driver is used from ASoC components, the concept of backup PCMs no longer fits. For ASoC topologies, the physical HDMI converters are presented as backend DAIs and these should match with hardware capabilities. The ASoC topology may define arbitrary PCMs (i.e. frontend DAIs) and have processing elements before eventual routing to the HDMI BE DAIs. With backup PCMs, the link between FE and BE DAIs would become dynamic and change when monitors are (un)plugged. This would lead to modifying the topology every time hotplug events happen, which is not currently possible in ASoC and there does not seem to be any obvious benefits from this design. To overcome above problems and enable the HDMI driver to be used from ASoC, this patch adds a new mode (mst_no_extra_pcms flags) to patch_hdmi.c. In this mode, the codec driver does not assume the backup PCMs to be created. Signed-off-by: Kai Vehmanen Reviewed-by: Takashi Iwai Reviewed-by: Pierre-Louis Bossart Link: https://lore.kernel.org/r/20191029134017.18901-2-kai.vehmanen@linux.intel.com Signed-off-by: Mark Brown Signed-off-by: Sasha Levin --- sound/pci/hda/hda_codec.h | 1 + sound/pci/hda/patch_hdmi.c | 19 ++++++++++++++----- 2 files changed, 15 insertions(+), 5 deletions(-) diff --git a/sound/pci/hda/hda_codec.h b/sound/pci/hda/hda_codec.h index 2003403ce1c82..199927694aeff 100644 --- a/sound/pci/hda/hda_codec.h +++ b/sound/pci/hda/hda_codec.h @@ -262,6 +262,7 @@ struct hda_codec { unsigned int force_pin_prefix:1; /* Add location prefix */ unsigned int link_down_at_suspend:1; /* link down at runtime suspend */ unsigned int relaxed_resume:1; /* don't resume forcibly for jack */ + unsigned int mst_no_extra_pcms:1; /* no backup PCMs for DP-MST */ #ifdef CONFIG_PM unsigned long power_on_acct; diff --git a/sound/pci/hda/patch_hdmi.c b/sound/pci/hda/patch_hdmi.c index c827a2a89cc3d..9d5e3c8d62b93 100644 --- a/sound/pci/hda/patch_hdmi.c +++ b/sound/pci/hda/patch_hdmi.c @@ -2063,15 +2063,24 @@ static bool is_hdmi_pcm_attached(struct hdac_device *hdac, int pcm_idx) static int generic_hdmi_build_pcms(struct hda_codec *codec) { struct hdmi_spec *spec = codec->spec; - int idx; + int idx, pcm_num; /* * for non-mst mode, pcm number is the same as before - * for DP MST mode, pcm number is (nid number + dev_num - 1) - * dev_num is the device entry number in a pin - * + * for DP MST mode without extra PCM, pcm number is same + * for DP MST mode with extra PCMs, pcm number is + * (nid number + dev_num - 1) + * dev_num is the device entry number in a pin */ - for (idx = 0; idx < spec->num_nids + spec->dev_num - 1; idx++) { + + if (codec->mst_no_extra_pcms) + pcm_num = spec->num_nids; + else + pcm_num = spec->num_nids + spec->dev_num - 1; + + codec_dbg(codec, "hdmi: pcm_num set to %d\n", pcm_num); + + for (idx = 0; idx < pcm_num; idx++) { struct hda_pcm *info; struct hda_pcm_stream *pstr; -- 2.20.1