115 lines
3.7 KiB
Diff
115 lines
3.7 KiB
Diff
From d58c054ba30b313bacbb7d19f559ecb4e3bb5c76 Mon Sep 17 00:00:00 2001
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From: Joerg Schambacher <joerg@hifiberry.com>
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Date: Fri, 19 Jan 2024 10:58:39 +0100
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Subject: [PATCH 1266/1295] ASoC: adds support for AMP4 Pro to the DAC Plus
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driver
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The AMP4 Pro is a I2S master mode capable amplifier with
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clean onboard clock generators.
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We can share the card driver between TAS575x amplifiers
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and the PCM512x DACs as they are SW compatible.
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From a HW perspective though we need to limit the sample
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rates to the standard audio rates to avoid running the
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onboard clocks through the PLL. Using the PLL would require
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even a different HW.
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DAI/stream name are also set accordingly to allow the user
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a convenient identification of the soundcard
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Needs the pcm512x driver with TAS575x support (already in
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upstream kernel).
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Signed-off-by: Joerg Schambacher <joerg@hifiberry.com>
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---
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sound/soc/bcm/hifiberry_dacplus.c | 41 ++++++++++++++++++++++++++++---
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1 file changed, 38 insertions(+), 3 deletions(-)
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--- a/sound/soc/bcm/hifiberry_dacplus.c
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+++ b/sound/soc/bcm/hifiberry_dacplus.c
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@@ -58,10 +58,21 @@ static bool leds_off;
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static bool auto_mute;
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static int mute_ext_ctl;
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static int mute_ext;
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+static bool tas_device;
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static struct gpio_desc *snd_mute_gpio;
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static struct gpio_desc *snd_reset_gpio;
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static struct snd_soc_card snd_rpi_hifiberry_dacplus;
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+static const u32 master_dai_rates[] = {
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+ 44100, 48000, 88200, 96000,
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+ 176400, 192000, 352800, 384000,
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+};
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+
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+static const struct snd_pcm_hw_constraint_list constraints_master = {
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+ .count = ARRAY_SIZE(master_dai_rates),
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+ .list = master_dai_rates,
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+};
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+
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static int snd_rpi_hifiberry_dacplus_mute_set(int mute)
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{
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gpiod_set_value_cansleep(snd_mute_gpio, mute);
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@@ -197,8 +208,13 @@ static int snd_rpi_hifiberry_dacplus_ini
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if (snd_rpi_hifiberry_is_dacpro) {
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struct snd_soc_dai_link *dai = rtd->dai_link;
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- dai->name = "HiFiBerry DAC+ Pro";
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- dai->stream_name = "HiFiBerry DAC+ Pro HiFi";
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+ if (tas_device) {
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+ dai->name = "HiFiBerry AMP4 Pro";
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+ dai->stream_name = "HiFiBerry AMP4 Pro HiFi";
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+ } else {
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+ dai->name = "HiFiBerry DAC+ Pro";
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+ dai->stream_name = "HiFiBerry DAC+ Pro HiFi";
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+ }
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dai->dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF
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| SND_SOC_DAIFMT_CBM_CFM;
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@@ -303,6 +319,18 @@ static int snd_rpi_hifiberry_dacplus_sta
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_component *component = asoc_rtd_to_codec(rtd, 0)->component;
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+ int ret;
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+
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+ if (tas_device && !slave) {
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+ ret = snd_pcm_hw_constraint_list(substream->runtime, 0,
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+ SNDRV_PCM_HW_PARAM_RATE,
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+ &constraints_master);
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+ if (ret < 0) {
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+ dev_err(rtd->card->dev,
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+ "Cannot apply constraints for sample rates\n");
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+ return ret;
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+ }
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+ }
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if (auto_mute)
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gpiod_set_value_cansleep(snd_mute_gpio, 0);
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@@ -324,7 +352,7 @@ static void snd_rpi_hifiberry_dacplus_sh
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}
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/* machine stream operations */
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-static struct snd_soc_ops snd_rpi_hifiberry_dacplus_ops = {
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+static const struct snd_soc_ops snd_rpi_hifiberry_dacplus_ops = {
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.hw_params = snd_rpi_hifiberry_dacplus_hw_params,
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.startup = snd_rpi_hifiberry_dacplus_startup,
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.shutdown = snd_rpi_hifiberry_dacplus_shutdown,
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@@ -394,6 +422,7 @@ static int snd_rpi_hifiberry_dacplus_pro
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struct snd_soc_card *card = &snd_rpi_hifiberry_dacplus;
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int len;
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struct device_node *tpa_node;
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+ struct device_node *tas_node;
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struct property *tpa_prop;
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struct of_changeset ocs;
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struct property *pp;
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@@ -430,6 +459,12 @@ static int snd_rpi_hifiberry_dacplus_pro
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}
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}
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+ tas_node = of_find_compatible_node(NULL, NULL, "ti,tas5756");
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+ if (tas_node) {
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+ tas_device = true;
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+ dev_info(&pdev->dev, "TAS5756 device found!\n");
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+ };
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+
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snd_rpi_hifiberry_dacplus.dev = &pdev->dev;
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if (pdev->dev.of_node) {
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struct device_node *i2s_node;
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