linux-kernel - [PATCH 3/3] ASoC: codecs: wsa884x: check if set

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Date:   Wed, 25 Oct 2023 16:46:01 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...aro.org>,
        Vinod Koul <vkoul@...nel.org>,
        Bard Liao <yung-chuan.liao@...ux.intel.com>,
        Pierre-Louis Bossart <pierre-louis.bossart@...ux.intel.com>,
        Sanyog Kale <sanyog.r.kale@...el.com>,
        Srinivas Kandagatla <srinivas.kandagatla@...aro.org>,
        Banajit Goswami <bgoswami@...cinc.com>,
        Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>,
        Takashi Iwai <tiwai@...e.com>, linux-arm-msm@...r.kernel.org,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Cc:     Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: [PATCH 3/3] ASoC: codecs: wsa884x: check if set_stream is called for proper bus

From: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>

If multiple WSA8840 speakers, from two separate Soundwire buses, are
used in one codec DAI link, the set_stream() should ignore calls for
setting stream from other Soundwire controller.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@...aro.org>
Co-developed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
---
 sound/soc/codecs/wsa884x.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/sound/soc/codecs/wsa884x.c b/sound/soc/codecs/wsa884x.c
index bee6e763c700..91205e8c96f1 100644
--- a/sound/soc/codecs/wsa884x.c
+++ b/sound/soc/codecs/wsa884x.c
@@ -1775,6 +1775,12 @@ static int wsa884x_set_stream(struct snd_soc_dai *dai,
 			      void *stream, int direction)
 {
 	struct wsa884x_priv *wsa884x = dev_get_drvdata(dai->dev);
+	struct sdw_stream_runtime *sruntime = stream;
+	struct sdw_slave *sdw = dev_to_sdw_dev(dai->dev);
+
+	/* Check if this belongs to same bus */
+	if (sdw->bus->dev != sruntime->dev)
+		return 0;
 
 	wsa884x->sruntime = stream;
 
-- 
2.34.1