linux-kernel - [RFC PATCH 3/5] HACK: ASoC: Tolerate N-cpus-to-M-codecs links

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Date:   Thu, 31 Mar 2022 02:04:47 +0200
From:   Martin Povišer <povik+lin@...ebit.org>
To:     Liam Girdwood <lgirdwood@...il.com>,
        Mark Brown <broonie@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Jaroslav Kysela <perex@...ex.cz>, Takashi Iwai <tiwai@...e.com>
Cc:     Martin Povišer <povik+lin@...ebit.org>,
        alsa-devel@...a-project.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, Mark Kettenis <kettenis@...nbsd.org>,
        Hector Martin <marcan@...can.st>,
        Sven Peter <sven@...npeter.dev>
Subject: [RFC PATCH 3/5] HACK: ASoC: Tolerate N-cpus-to-M-codecs links

Tolerate N-to-M DAI links while using the first CPU DAI to decide
playback/capture abilities.

Signed-off-by: Martin Povišer <povik+lin@...ebit.org>
---
 sound/soc/soc-pcm.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index 9a954680d492..770cf367a147 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -2781,9 +2781,12 @@ static int soc_get_playback_capture(struct snd_soc_pcm_runtime *rtd,
 			} else if (rtd->num_cpus == rtd->num_codecs) {
 				cpu_dai = asoc_rtd_to_cpu(rtd, i);
 			} else {
+#if 0
 				dev_err(rtd->card->dev,
 					"N cpus to M codecs link is not supported yet\n");
 				return -EINVAL;
+#endif
+				cpu_dai = asoc_rtd_to_cpu(rtd, 0);
 			}
 
 			if (snd_soc_dai_stream_valid(codec_dai, SNDRV_PCM_STREAM_PLAYBACK) &&
-- 
2.33.0