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105 lines
3.3 KiB
Diff
105 lines
3.3 KiB
Diff
6 years ago
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From f7045758fffa176ea68730ea855415e619bf516d Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.org>
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Date: Sat, 3 Mar 2018 16:25:19 +0000
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Subject: [PATCH 240/454] audioinjector-octo: Add continuous clock feature
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By user request, add a switch to prevent the clocks being stopped when
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the stream is paused, stopped or shutdown. Provide access to the switch
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by adding a 'non-stop-clocks' parameter to the audioinjector-addons
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overlay.
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See: https://github.com/raspberrypi/linux/issues/2409
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Signed-off-by: Phil Elwell <phil@raspberrypi.org>
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---
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arch/arm/boot/dts/overlays/README | 5 +++--
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.../overlays/audioinjector-addons-overlay.dts | 6 +++++-
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sound/soc/bcm/audioinjector-octo-soundcard.c | 19 +++++++++++--------
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3 files changed, 19 insertions(+), 11 deletions(-)
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--- a/arch/arm/boot/dts/overlays/README
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+++ b/arch/arm/boot/dts/overlays/README
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@@ -357,8 +357,9 @@ Params: interrupt GPIO use
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Name: audioinjector-addons
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Info: Configures the audioinjector.net audio add on soundcards
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-Load: dtoverlay=audioinjector-addons
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-Params: <None>
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+Load: dtoverlay=audioinjector-addons,<param>=<val>
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+Params: non-stop-clocks Keeps the clocks running even when the stream
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+ is paused or stopped (default off)
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Name: audioinjector-wm8731-audio
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--- a/arch/arm/boot/dts/overlays/audioinjector-addons-overlay.dts
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+++ b/arch/arm/boot/dts/overlays/audioinjector-addons-overlay.dts
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@@ -42,7 +42,7 @@
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fragment@2 {
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target = <&sound>;
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- __overlay__ {
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+ snd: __overlay__ {
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compatible = "ai,audioinjector-octo-soundcard";
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mult-gpios = <&gpio 27 0>, <&gpio 22 0>, <&gpio 23 0>,
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<&gpio 24 0>;
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@@ -52,4 +52,8 @@
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status = "okay";
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};
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};
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+
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+ __overrides__ {
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+ non-stop-clocks = <&snd>, "non-stop-clocks?";
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+ };
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};
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--- a/sound/soc/bcm/audioinjector-octo-soundcard.c
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+++ b/sound/soc/bcm/audioinjector-octo-soundcard.c
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@@ -29,6 +29,7 @@
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static struct gpio_descs *mult_gpios;
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static struct gpio_desc *codec_rst_gpio;
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static unsigned int audioinjector_octo_rate;
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+static bool non_stop_clocks;
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static const unsigned int audioinjector_octo_rates[] = {
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96000, 48000, 32000, 24000, 16000, 8000, 88200, 44100, 29400, 22050, 14700,
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@@ -133,12 +134,16 @@ static int audioinjector_octo_hw_params(
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static int audioinjector_octo_trigger(struct snd_pcm_substream *substream,
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int cmd){
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int mult[4];
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- mult[0] = 0;
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- mult[1] = 0;
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- mult[2] = 0;
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- mult[3] = 0;
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+
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+ memset(mult, 0, sizeof(mult));
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switch (cmd) {
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+ case SNDRV_PCM_TRIGGER_STOP:
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+ case SNDRV_PCM_TRIGGER_SUSPEND:
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+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
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+ if (!non_stop_clocks)
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+ break;
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+ /* Drop through... */
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case SNDRV_PCM_TRIGGER_START:
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case SNDRV_PCM_TRIGGER_RESUME:
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case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
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@@ -177,10 +182,6 @@ static int audioinjector_octo_trigger(st
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return -EINVAL;
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}
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break;
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- case SNDRV_PCM_TRIGGER_STOP:
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- case SNDRV_PCM_TRIGGER_SUSPEND:
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- case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
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- break;
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default:
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return -EINVAL;
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}
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@@ -276,6 +277,8 @@ static int audioinjector_octo_probe(stru
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if (IS_ERR(codec_rst_gpio))
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return PTR_ERR(codec_rst_gpio);
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+ non_stop_clocks = of_property_read_bool(pdev->dev.of_node, "non-stop-clocks");
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+
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if (codec_rst_gpio)
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gpiod_set_value(codec_rst_gpio, 1);
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msleep(500);
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