openwrt/target/linux/bcm27xx/patches-4.19/950-0440-Fixed-48k-timing-issue.patch

From 539e2eef7dbfb58ab028a5530430611973dd4c84 Mon Sep 17 00:00:00 2001
From: IQaudIO <gordon@iqaudio.com>
Date: Thu, 6 Jun 2019 10:20:55 +0100
Subject: [PATCH] Fixed 48k timing issue

---
 sound/soc/bcm/iqaudio-codec.c | 33 ++++++++++++++++++++++++++++-----
 1 file changed, 28 insertions(+), 5 deletions(-)

--- a/sound/soc/bcm/iqaudio-codec.c
+++ b/sound/soc/bcm/iqaudio-codec.c
@@ -45,11 +45,15 @@ static int snd_rpi_iqaudio_pll_control(s
 					  0);
 		if (ret)
 			dev_err(card->dev, "Failed to bypass PLL: %d\n", ret);
+		/* Allow PLL time to bypass */
+		msleep(100);
 	} else if (SND_SOC_DAPM_EVENT_ON(event)) {
 		ret = snd_soc_dai_set_pll(codec_dai, 0, DA7213_SYSCLK_PLL, 0,
 					  pll_out);
 		if (ret)
 			dev_err(card->dev, "Failed to enable PLL: %d\n", ret);
+		/* Allow PLL time to lock */
+		msleep(100);
 	}
 
 	return ret;
@@ -71,6 +75,13 @@ static int snd_rpi_iqaudio_post_dapm_eve
      return 0;
 }
 
+static const struct snd_kcontrol_new dapm_controls[] = {
+	SOC_DAPM_PIN_SWITCH("HP Jack"),
+	SOC_DAPM_PIN_SWITCH("MIC Jack"),
+	SOC_DAPM_PIN_SWITCH("Onboard MIC"),
+	SOC_DAPM_PIN_SWITCH("AUX Jack"),
+};
+
 static const struct snd_soc_dapm_widget dapm_widgets[] = {
 	SND_SOC_DAPM_HP("HP Jack", NULL),
 	SND_SOC_DAPM_MIC("MIC Jack", NULL),
@@ -87,14 +98,14 @@ static const struct snd_soc_dapm_route a
 	{"HP Jack", NULL, "HPR"},
 	{"HP Jack", NULL, "PLL Control"},
 
-	{"AUX Jack", NULL, "AUXR"},
-	{"AUX Jack", NULL, "AUXL"},
+	{"AUXR", NULL, "AUX Jack"},
+	{"AUXL", NULL, "AUX Jack"},
 	{"AUX Jack", NULL, "PLL Control"},
 
 	/* Assume Mic1 is linked to Headset and Mic2 to on-board mic */
-	{"MIC Jack", NULL, "MIC1"},
+	{"MIC1", NULL, "MIC Jack"},
 	{"MIC Jack", NULL, "PLL Control"},
-	{"Onboard MIC", NULL, "MIC2"},
+	{"MIC2", NULL, "Onboard MIC"},
 	{"Onboard MIC", NULL, "PLL Control"},
 };
 
@@ -106,6 +117,16 @@ static int snd_rpi_iqaudio_codec_init(st
 	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 	int ret;
 
+	/*
+	 * Disable AUX Jack Pin by default to prevent PLL being enabled at
+	 * startup. This avoids holding the PLL to a fixed SR config for
+	 * subsequent streams.
+	 *
+	 * This pin can still be enabled later, as required by user-space.
+	 */
+	snd_soc_dapm_disable_pin(&rtd->card->dapm, "AUX Jack");
+	snd_soc_dapm_sync(&rtd->card->dapm);
+
 	/* Set bclk ratio to align with codec's BCLK rate */
 	ret = snd_soc_dai_set_bclk_ratio(cpu_dai, 64);
 	if (ret) {
@@ -168,6 +189,8 @@ static struct snd_soc_card snd_rpi_iqaud
 	.owner			= THIS_MODULE,
 	.dai_link		= snd_rpi_iqaudio_codec_dai,
 	.num_links		= ARRAY_SIZE(snd_rpi_iqaudio_codec_dai),
+	.controls		= dapm_controls,
+	.num_controls		= ARRAY_SIZE(dapm_controls),
 	.dapm_widgets		= dapm_widgets,
 	.num_dapm_widgets	= ARRAY_SIZE(dapm_widgets),
 	.dapm_routes		= audio_map,
@@ -204,7 +227,7 @@ static int snd_rpi_iqaudio_codec_probe(s
 
 		if (of_property_read_string(pdev->dev.of_node,
 					"dai_stream_name", &dai->stream_name))
-			dai->stream_name = "IQaudIO CODEC HiFi v1.1";
+			dai->stream_name = "IQaudIO CODEC HiFi v1.2";
 
 	}