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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org,
        Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>,
        Ranjani Sridharan <ranjani.sridharan@linux.intel.com>,
        Kai Vehmanen <kai.vehmanen@linux.intel.com>,
        Mark Brown <broonie@kernel.org>
Subject: [PATCH 5.16 1038/1039] ASoC: SOF: sof-audio: setup sched widgets during pipeline complete step
Date:   Mon, 24 Jan 2022 19:47:07 +0100
Message-Id: <20220124184200.174533144@linuxfoundation.org>
In-Reply-To: <20220124184125.121143506@linuxfoundation.org>
References: <20220124184125.121143506@linuxfoundation.org>
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From: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>

commit 01429183f479c54c1b5d15453a8ce574ea43e525 upstream.

Older firmware prior to ABI 3.19 has a dependency where the scheduler
widgets need to be setup last. Moving the call to sof_widget_setup()
before the pipeline_complete() call also helps remove the need for the
'reverse' direction when walking through the widget list - this was
only working because of the topology macros but the topology does not
require any order.

Fixes: 5fcdbb2d45df ("ASoC: SOF: Add support for dynamic pipelines")
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com>
Signed-off-by: Kai Vehmanen <kai.vehmanen@linux.intel.com>
Link: https://lore.kernel.org/r/20211123171606.129350-1-kai.vehmanen@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 sound/soc/sof/sof-audio.c |   19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

--- a/sound/soc/sof/sof-audio.c
+++ b/sound/soc/sof/sof-audio.c
@@ -596,16 +596,25 @@ const struct sof_ipc_pipe_new *snd_sof_p
 
 int sof_set_up_pipelines(struct snd_sof_dev *sdev, bool verify)
 {
+	struct sof_ipc_fw_version *v = &sdev->fw_ready.version;
 	struct snd_sof_widget *swidget;
 	struct snd_sof_route *sroute;
 	int ret;
 
 	/* restore pipeline components */
-	list_for_each_entry_reverse(swidget, &sdev->widget_list, list) {
+	list_for_each_entry(swidget, &sdev->widget_list, list) {
 		/* only set up the widgets belonging to static pipelines */
 		if (!verify && swidget->dynamic_pipeline_widget)
 			continue;
 
+		/*
+		 * For older firmware, skip scheduler widgets in this loop,
+		 * sof_widget_setup() will be called in the 'complete pipeline' loop
+		 */
+		if (v->abi_version < SOF_ABI_VER(3, 19, 0) &&
+		    swidget->id == snd_soc_dapm_scheduler)
+			continue;
+
 		/* update DAI config. The IPC will be sent in sof_widget_setup() */
 		if (WIDGET_IS_DAI(swidget->id)) {
 			struct snd_sof_dai *dai = swidget->private;
@@ -653,6 +662,12 @@ int sof_set_up_pipelines(struct snd_sof_
 			if (!verify && swidget->dynamic_pipeline_widget)
 				continue;
 
+			if (v->abi_version < SOF_ABI_VER(3, 19, 0)) {
+				ret = sof_widget_setup(sdev, swidget);
+				if (ret < 0)
+					return ret;
+			}
+
 			swidget->complete =
 				snd_sof_complete_pipeline(sdev, swidget);
 			break;
@@ -681,7 +696,7 @@ int sof_tear_down_pipelines(struct snd_s
 	 * sroute->setup because during suspend all streams are suspended and during topology
 	 * loading the sound card unavailable to open PCMs.
 	 */
-	list_for_each_entry_reverse(swidget, &sdev->widget_list, list) {
+	list_for_each_entry(swidget, &sdev->widget_list, list) {
 		if (swidget->dynamic_pipeline_widget)
 			continue;