ASoC: fsl_spdif: Silence output on stop

[ Upstream commit 0e4c2b6b0c4a4b4014d9424c27e5e79d185229c5 ]

Clear TX registers on stop to prevent the SPDIF interface from sending
last written word over and over again.

Fixes: a2388a498ad2 ("ASoC: fsl: Add S/PDIF CPU DAI driver")
Signed-off-by: Matus Gajdos <matuszpd@gmail.com>
Reviewed-by: Fabio Estevam <festevam@gmail.com>
Link: https://lore.kernel.org/r/20230719164729.19969-1-matuszpd@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/sound/soc/fsl/fsl_spdif.c b/sound/soc/fsl/fsl_spdif.c
index 8b5c3ba48516ca77068cbcb4334fd800e8dc17e1..5b107f2555ddb210ad11807ae6ed70979fca57ea 100644 (file)
--- a/sound/soc/fsl/fsl_spdif.c
+++ b/sound/soc/fsl/fsl_spdif.c
@@ -666,6 +666,8 @@ static int fsl_spdif_trigger(struct snd_pcm_substream *substream,
        case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
                regmap_update_bits(regmap, REG_SPDIF_SCR, dmaen, 0);
                regmap_update_bits(regmap, REG_SPDIF_SIE, intr, 0);
+               regmap_write(regmap, REG_SPDIF_STL, 0x0);
+               regmap_write(regmap, REG_SPDIF_STR, 0x0);
                break;
        default:
                return -EINVAL;