1 files changed, 64 insertions, 0 deletions
diff --git a/target/linux/bcm27xx/patches-5.4/950-0919-Mute-bug-fix-for-the-Audioinjector.net-isolated-soun.patch b/target/linux/bcm27xx/patches-5.4/950-0919-Mute-bug-fix-for-the-Audioinjector.net-isolated-soun.patch
new file mode 100644
index 0000000000..10fe757577
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.4/950-0919-Mute-bug-fix-for-the-Audioinjector.net-isolated-soun.patch
@@ -0,0 +1,64 @@
+From 11a2b192e0a8b7514895f9f6b7451f4c6ddd0a22 Mon Sep 17 00:00:00 2001
+From: Matt Flax <flatmax@flatmax.org>
+Date: Fri, 17 Jul 2020 09:17:36 +1000
+Subject: [PATCH] Mute bug fix for the Audioinjector.net isolated
+ soundcard.
+
+---
+ .../bcm/audioinjector-isolated-soundcard.c    | 26 +++----------------
+ 1 file changed, 3 insertions(+), 23 deletions(-)
+
+--- a/sound/soc/bcm/audioinjector-isolated-soundcard.c
++++ b/sound/soc/bcm/audioinjector-isolated-soundcard.c
+@@ -42,41 +42,20 @@ static int audioinjector_isolated_dai_in
+ 	int ret=snd_soc_dai_set_sysclk(rtd->codec_dai, 0, 24576000, 0);
+ 	if (ret)
+ 		return ret;
+-
+ 	return snd_soc_dai_set_bclk_ratio(rtd->cpu_dai, 64);
+ }
+ 
+ static int audioinjector_isolated_startup(struct snd_pcm_substream *substream)
+ {
+ 	snd_pcm_hw_constraint_list(substream->runtime, 0,
+-				SNDRV_PCM_HW_PARAM_RATE, &audioinjector_isolated_constraints);
+-
+-	return 0;
+-}
++			SNDRV_PCM_HW_PARAM_RATE, &audioinjector_isolated_constraints);
+ 
+-static int audioinjector_isolated_trigger(struct snd_pcm_substream *substream,
+-								int cmd){
+-
+-	switch (cmd) {
+-	case SNDRV_PCM_TRIGGER_STOP:
+-	case SNDRV_PCM_TRIGGER_SUSPEND:
+-	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+-		gpiod_set_value(mute_gpio, 0);
+-		break;
+-	case SNDRV_PCM_TRIGGER_START:
+-	case SNDRV_PCM_TRIGGER_RESUME:
+-	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+-		gpiod_set_value(mute_gpio, 1);
+-		break;
+-	default:
+-		return -EINVAL;
+-	}
++	gpiod_set_value(mute_gpio, 1);
+ 	return 0;
+ }
+ 
+ static struct snd_soc_ops audioinjector_isolated_ops = {
+ 	.startup	= audioinjector_isolated_startup,
+-	.trigger = audioinjector_isolated_trigger,
+ };
+ 
+ SND_SOC_DAILINK_DEFS(audioinjector_isolated,
+@@ -153,6 +132,7 @@ static int audioinjector_isolated_probe(
+ 			dev_err(&pdev->dev, "mute gpio not found in dt overlay\n");
+ 			return PTR_ERR(mute_gpio);
+ 		}
++		gpiod_set_value(mute_gpio, 0);
+ 	}
+ 
+ 	ret = devm_snd_soc_register_card(&pdev->dev, card);