linux-kernel - [PATCH AUTOSEL 6.11 08/32] soundwire: intel_ace2x: Send PDI stream number during prepare

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Message-ID: <20241028105050.3559169-8-sashal@kernel.org>
Date: Mon, 28 Oct 2024 06:49:50 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>,
	Péter Ujfalusi <peter.ujfalusi@...ux.intel.com>,
	Kai Vehmanen <kai.vehmanen@...ux.intel.com>,
	Bard Liao <yung-chuan.liao@...ux.intel.com>,
	Vinod Koul <vkoul@...nel.org>,
	Mark Brown <broonie@...nel.org>,
	Sasha Levin <sashal@...nel.org>,
	linux-sound@...r.kernel.org
Subject: [PATCH AUTOSEL 6.11 08/32] soundwire: intel_ace2x: Send PDI stream number during prepare

From: Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>

[ Upstream commit c78f1e15e46ac82607eed593b22992fd08644d96 ]

In the case of a prepare callback after an xrun or when the PCM is
restarted after a call to snd_pcm_drain/snd_pcm_drop, avoid
reprogramming the SHIM registers but send the PDI stream number so that
the link DMA data can be set. This is needed for the case that the DMA
data is cleared when the PCM is stopped and restarted without being
closed.

Link: https://github.com/thesofproject/sof/issues/9502
Signed-off-by: Ranjani Sridharan <ranjani.sridharan@...ux.intel.com>
Reviewed-by: Péter Ujfalusi <peter.ujfalusi@...ux.intel.com>
Reviewed-by: Kai Vehmanen <kai.vehmanen@...ux.intel.com>
Signed-off-by: Bard Liao <yung-chuan.liao@...ux.intel.com>
Acked-by: Vinod Koul <vkoul@...nel.org>
All: stable@...r.kernel.org # 6.10.x 6.11.x
Link: https://patch.msgid.link/20241016032910.14601-4-yung-chuan.liao@linux.intel.com
Signed-off-by: Mark Brown <broonie@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/soundwire/intel_ace2x.c | 19 ++++++-------------
 1 file changed, 6 insertions(+), 13 deletions(-)

diff --git a/drivers/soundwire/intel_ace2x.c b/drivers/soundwire/intel_ace2x.c
index 781fe0aefa68f..655766af2ea56 100644
--- a/drivers/soundwire/intel_ace2x.c
+++ b/drivers/soundwire/intel_ace2x.c
@@ -376,11 +376,12 @@ static int intel_hw_params(struct snd_pcm_substream *substream,
 static int intel_prepare(struct snd_pcm_substream *substream,
 			 struct snd_soc_dai *dai)
 {
+	struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
 	struct sdw_cdns *cdns = snd_soc_dai_get_drvdata(dai);
 	struct sdw_intel *sdw = cdns_to_intel(cdns);
 	struct sdw_cdns_dai_runtime *dai_runtime;
+	struct snd_pcm_hw_params *hw_params;
 	int ch, dir;
-	int ret = 0;
 
 	dai_runtime = cdns->dai_runtime_array[dai->id];
 	if (!dai_runtime) {
@@ -389,12 +390,8 @@ static int intel_prepare(struct snd_pcm_substream *substream,
 		return -EIO;
 	}
 
+	hw_params = &rtd->dpcm[substream->stream].hw_params;
 	if (dai_runtime->suspended) {
-		struct snd_soc_pcm_runtime *rtd = snd_soc_substream_to_rtd(substream);
-		struct snd_pcm_hw_params *hw_params;
-
-		hw_params = &rtd->dpcm[substream->stream].hw_params;
-
 		dai_runtime->suspended = false;
 
 		/*
@@ -415,15 +412,11 @@ static int intel_prepare(struct snd_pcm_substream *substream,
 		/* the SHIM will be configured in the callback functions */
 
 		sdw_cdns_config_stream(cdns, ch, dir, dai_runtime->pdi);
-
-		/* Inform DSP about PDI stream number */
-		ret = intel_params_stream(sdw, substream, dai,
-					  hw_params,
-					  sdw->instance,
-					  dai_runtime->pdi->intel_alh_id);
 	}
 
-	return ret;
+	/* Inform DSP about PDI stream number */
+	return intel_params_stream(sdw, substream, dai, hw_params, sdw->instance,
+				   dai_runtime->pdi->intel_alh_id);
 }
 
 static int
-- 
2.43.0