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Diffstat (limited to 'target/linux/brcm2708/patches-4.4/0411-IQaudIO-auto-mute-for-AMP-and-DigiAMP.patch')
-rw-r--r--target/linux/brcm2708/patches-4.4/0411-IQaudIO-auto-mute-for-AMP-and-DigiAMP.patch272
1 files changed, 0 insertions, 272 deletions
diff --git a/target/linux/brcm2708/patches-4.4/0411-IQaudIO-auto-mute-for-AMP-and-DigiAMP.patch b/target/linux/brcm2708/patches-4.4/0411-IQaudIO-auto-mute-for-AMP-and-DigiAMP.patch
deleted file mode 100644
index 882fa0d169..0000000000
--- a/target/linux/brcm2708/patches-4.4/0411-IQaudIO-auto-mute-for-AMP-and-DigiAMP.patch
+++ /dev/null
@@ -1,272 +0,0 @@
-From fdf637067ca6a532f785ca4fe54a38caeda39d48 Mon Sep 17 00:00:00 2001
-From: DigitalDreamtime <clive.messer@digitaldreamtime.co.uk>
-Date: Mon, 9 May 2016 20:38:08 +0100
-Subject: [PATCH] IQaudIO: auto-mute for AMP+ and DigiAMP+
-
-IQAudIO amplifier mute via GPIO22. Add dt params for "one-shot" unmute
-and auto mute.
-
-Revision 2, auto mute implementing HiassofT suggestion to mute/unmute
-using set_bias_level, rather than startup/shutdown....
-"By default DAPM waits 5 seconds (pmdown_time) before shutting down
-playback streams so a close/stop immediately followed by open/start
-doesn't trigger an amp mute+unmute."
-
-Tested on both AMP+ (via DAC+) and DigiAMP+, with both options...
-
-dtoverlay=iqaudio-dacplus,unmute_amp
- "one-shot" unmute when kernel module loads.
-
-dtoverlay=iqaudio-dacplus,auto_mute_amp
- Unmute amp when ALSA device opened by a client. Mute, with 5 second delay
- when ALSA device closed. (Re-opening the device within the 5 second close
- window, will cancel mute.)
-
-Revision 4, using gpiod.
-
-Revision 5, clean-up formatting before adding mute code.
- - Convert tab plus 4 space formatting to 2x tab
- - Remove '// NOT USED' commented code
-
-Revision 6, don't attempt to "one-shot" unmute amp, unless card is
-successfully registered.
-
-Signed-off-by: DigitalDreamtime <clive.messer@digitaldreamtime.co.uk>
----
- arch/arm/boot/dts/overlays/README | 4 +
- .../boot/dts/overlays/iqaudio-dacplus-overlay.dts | 7 +-
- sound/soc/bcm/iqaudio-dac.c | 144 ++++++++++++++++-----
- 3 files changed, 124 insertions(+), 31 deletions(-)
-
---- a/arch/arm/boot/dts/overlays/README
-+++ b/arch/arm/boot/dts/overlays/README
-@@ -540,6 +540,10 @@ Params: 24db_digital_gain Allow ga
- responsibility of the user to ensure that
- the Digital volume control is set to a value
- that does not result in clipping/distortion!)
-+ auto_mute_amp If specified, unmute/mute the IQaudIO amp when
-+ starting/stopping audio playback.
-+ unmute_amp If specified, unmute the IQaudIO amp once when
-+ the DAC driver module loads.
-
-
- Name: justboom-dac
---- a/arch/arm/boot/dts/overlays/iqaudio-dacplus-overlay.dts
-+++ b/arch/arm/boot/dts/overlays/iqaudio-dacplus-overlay.dts
-@@ -30,14 +30,17 @@
-
- fragment@2 {
- target = <&sound>;
-- frag2: __overlay__ {
-+ iqaudio_dac: __overlay__ {
- compatible = "iqaudio,iqaudio-dac";
- i2s-controller = <&i2s>;
-+ mute-gpios = <&gpio 22 0>;
- status = "okay";
- };
- };
-
- __overrides__ {
-- 24db_digital_gain = <&frag2>,"iqaudio,24db_digital_gain?";
-+ 24db_digital_gain = <&iqaudio_dac>,"iqaudio,24db_digital_gain?";
-+ auto_mute_amp = <&iqaudio_dac>,"iqaudio-dac,auto-mute-amp?";
-+ unmute_amp = <&iqaudio_dac>,"iqaudio-dac,unmute-amp?";
- };
- };
---- a/sound/soc/bcm/iqaudio-dac.c
-+++ b/sound/soc/bcm/iqaudio-dac.c
-@@ -15,6 +15,7 @@
- */
-
- #include <linux/module.h>
-+#include <linux/gpio/consumer.h>
- #include <linux/platform_device.h>
-
- #include <sound/core.h>
-@@ -25,6 +26,8 @@
-
- static bool digital_gain_0db_limit = true;
-
-+static struct gpio_desc *mute_gpio;
-+
- static int snd_rpi_iqaudio_dac_init(struct snd_soc_pcm_runtime *rtd)
- {
- if (digital_gain_0db_limit)
-@@ -41,11 +44,9 @@ static int snd_rpi_iqaudio_dac_init(stru
- }
-
- static int snd_rpi_iqaudio_dac_hw_params(struct snd_pcm_substream *substream,
-- struct snd_pcm_hw_params *params)
-+ struct snd_pcm_hw_params *params)
- {
- struct snd_soc_pcm_runtime *rtd = substream->private_data;
--// NOT USED struct snd_soc_dai *codec_dai = rtd->codec_dai;
--// NOT USED struct snd_soc_codec *codec = rtd->codec;
- struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
-
- unsigned int sample_bits =
-@@ -54,6 +55,56 @@ static int snd_rpi_iqaudio_dac_hw_params
- return snd_soc_dai_set_bclk_ratio(cpu_dai, sample_bits * 2);
- }
-
-+static void snd_rpi_iqaudio_gpio_mute(struct snd_soc_card *card)
-+{
-+ if (mute_gpio) {
-+ dev_info(card->dev, "%s: muting amp using GPIO22\n",
-+ __func__);
-+ gpiod_set_value_cansleep(mute_gpio, 0);
-+ }
-+}
-+
-+static void snd_rpi_iqaudio_gpio_unmute(struct snd_soc_card *card)
-+{
-+ if (mute_gpio) {
-+ dev_info(card->dev, "%s: un-muting amp using GPIO22\n",
-+ __func__);
-+ gpiod_set_value_cansleep(mute_gpio, 1);
-+ }
-+}
-+
-+static int snd_rpi_iqaudio_set_bias_level(struct snd_soc_card *card,
-+ struct snd_soc_dapm_context *dapm, enum snd_soc_bias_level level)
-+{
-+ struct snd_soc_dai *codec_dai = card->rtd[0].codec_dai;
-+
-+ if (dapm->dev != codec_dai->dev)
-+ return 0;
-+
-+ switch (level) {
-+ case SND_SOC_BIAS_PREPARE:
-+ if (dapm->bias_level != SND_SOC_BIAS_STANDBY)
-+ break;
-+
-+ /* UNMUTE AMP */
-+ snd_rpi_iqaudio_gpio_unmute(card);
-+
-+ break;
-+ case SND_SOC_BIAS_STANDBY:
-+ if (dapm->bias_level != SND_SOC_BIAS_PREPARE)
-+ break;
-+
-+ /* MUTE AMP */
-+ snd_rpi_iqaudio_gpio_mute(card);
-+
-+ break;
-+ default:
-+ break;
-+ }
-+
-+ return 0;
-+}
-+
- /* machine stream operations */
- static struct snd_soc_ops snd_rpi_iqaudio_dac_ops = {
- .hw_params = snd_rpi_iqaudio_dac_hw_params,
-@@ -82,46 +133,81 @@ static struct snd_soc_card snd_rpi_iqaud
- static int snd_rpi_iqaudio_dac_probe(struct platform_device *pdev)
- {
- int ret = 0;
-+ bool gpio_unmute = false;
-
- snd_rpi_iqaudio_dac.dev = &pdev->dev;
-
- if (pdev->dev.of_node) {
-- struct device_node *i2s_node;
-- struct snd_soc_card *card = &snd_rpi_iqaudio_dac;
-- struct snd_soc_dai_link *dai = &snd_rpi_iqaudio_dac_dai[0];
-- i2s_node = of_parse_phandle(pdev->dev.of_node,
-- "i2s-controller", 0);
--
-- if (i2s_node) {
-- dai->cpu_dai_name = NULL;
-- dai->cpu_of_node = i2s_node;
-- dai->platform_name = NULL;
-- dai->platform_of_node = i2s_node;
-- }
--
-- digital_gain_0db_limit = !of_property_read_bool(pdev->dev.of_node,
-- "iqaudio,24db_digital_gain");
-- if (of_property_read_string(pdev->dev.of_node, "card_name",
-- &card->name))
-- card->name = "IQaudIODAC";
-- if (of_property_read_string(pdev->dev.of_node, "dai_name",
-- &dai->name))
-- dai->name = "IQaudIO DAC";
-- if (of_property_read_string(pdev->dev.of_node, "dai_stream_name",
-- &dai->stream_name))
-- dai->stream_name = "IQaudIO DAC HiFi";
-+ struct device_node *i2s_node;
-+ struct snd_soc_card *card = &snd_rpi_iqaudio_dac;
-+ struct snd_soc_dai_link *dai = &snd_rpi_iqaudio_dac_dai[0];
-+ bool auto_gpio_mute = false;
-+
-+ i2s_node = of_parse_phandle(pdev->dev.of_node,
-+ "i2s-controller", 0);
-+ if (i2s_node) {
-+ dai->cpu_dai_name = NULL;
-+ dai->cpu_of_node = i2s_node;
-+ dai->platform_name = NULL;
-+ dai->platform_of_node = i2s_node;
-+ }
-+
-+ digital_gain_0db_limit = !of_property_read_bool(
-+ pdev->dev.of_node, "iqaudio,24db_digital_gain");
-+
-+ if (of_property_read_string(pdev->dev.of_node, "card_name",
-+ &card->name))
-+ card->name = "IQaudIODAC";
-+
-+ if (of_property_read_string(pdev->dev.of_node, "dai_name",
-+ &dai->name))
-+ dai->name = "IQaudIO DAC";
-+
-+ if (of_property_read_string(pdev->dev.of_node,
-+ "dai_stream_name", &dai->stream_name))
-+ dai->stream_name = "IQaudIO DAC HiFi";
-+
-+ /* gpio_unmute - one time unmute amp using GPIO */
-+ gpio_unmute = of_property_read_bool(pdev->dev.of_node,
-+ "iqaudio-dac,unmute-amp");
-+
-+ /* auto_gpio_mute - mute/unmute amp using GPIO */
-+ auto_gpio_mute = of_property_read_bool(pdev->dev.of_node,
-+ "iqaudio-dac,auto-mute-amp");
-+
-+ if (auto_gpio_mute || gpio_unmute) {
-+ mute_gpio = devm_gpiod_get_optional(&pdev->dev, "mute",
-+ GPIOD_OUT_LOW);
-+ if (IS_ERR(mute_gpio)) {
-+ ret = PTR_ERR(mute_gpio);
-+ dev_err(&pdev->dev,
-+ "Failed to get mute gpio: %d\n", ret);
-+ return ret;
-+ }
-+
-+ if (auto_gpio_mute && mute_gpio)
-+ snd_rpi_iqaudio_dac.set_bias_level =
-+ snd_rpi_iqaudio_set_bias_level;
-+ }
- }
-
- ret = snd_soc_register_card(&snd_rpi_iqaudio_dac);
-- if (ret)
-+ if (ret) {
- dev_err(&pdev->dev,
- "snd_soc_register_card() failed: %d\n", ret);
-+ return ret;
-+ }
-+
-+ if (gpio_unmute && mute_gpio)
-+ snd_rpi_iqaudio_gpio_unmute(&snd_rpi_iqaudio_dac);
-
-- return ret;
-+ return 0;
- }
-
- static int snd_rpi_iqaudio_dac_remove(struct platform_device *pdev)
- {
-+ snd_rpi_iqaudio_gpio_mute(&snd_rpi_iqaudio_dac);
-+
- return snd_soc_unregister_card(&snd_rpi_iqaudio_dac);
- }
-
generated by cgit v1.2.3 (git 2.25.1) at 2024-07-11 22:52:23 +0000