linux-kernel - [PATCH] ASoC: soc-pcm: Don't zero TDM masks in __soc_pcm

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Date:   Fri, 4 Nov 2022 13:22:13 +0000
From:   Richard Fitzgerald <rf@...nsource.cirrus.com>
To:     <broonie@...nel.org>
CC:     <bcousson@...libre.com>, <fparent@...libre.com>,
        <misael.lopez@...com>, <alsa-devel@...a-project.org>,
        <linux-kernel@...r.kernel.org>, <patches@...nsource.cirrus.com>,
        Richard Fitzgerald <rf@...nsource.cirrus.com>
Subject: [PATCH] ASoC: soc-pcm: Don't zero TDM masks in __soc_pcm_open()

The DAI tx_mask and rx_mask are set by snd_soc_dai_set_tdm_slot()
and used by later code that depends on the TDM settings. So
__soc_pcm_open() should not be obliterating those mask values.

The code in __soc_pcm_hw_params() uses these masks to calculate the
active channels so that only the AIF_IN/AIF_OUT widgets for the
active TDM slots are enabled. The zeroing of the masks in
__soc_pcm_open() disables this functionality so all AIF widgets
were enabled even for channels that are not assigned to a TDM slot.

Signed-off-by: Richard Fitzgerald <rf@...nsource.cirrus.com>
Fixes: 2e5894d73789 ("ASoC: pcm: Add support for DAI multicodec")
---
 sound/soc/soc-pcm.c | 5 -----
 1 file changed, 5 deletions(-)

diff --git a/sound/soc/soc-pcm.c b/sound/soc/soc-pcm.c
index d8e4677f3002..493f003273d0 100644
--- a/sound/soc/soc-pcm.c
+++ b/sound/soc/soc-pcm.c
@@ -822,11 +822,6 @@ static int __soc_pcm_open(struct snd_soc_pcm_runtime *rtd,
 		ret = snd_soc_dai_startup(dai, substream);
 		if (ret < 0)
 			goto err;
-
-		if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
-			dai->tx_mask = 0;
-		else
-			dai->rx_mask = 0;
 	}

 	/* Dynamic PCM DAI links compat checks use dynamic capabilities */
-- 
2.30.2