diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0075-Allo-Piano-DAC-boards-Initial-2-channel-stereo-suppo.patch')
| -rw-r--r-- | target/linux/brcm2708/patches-4.19/950-0075-Allo-Piano-DAC-boards-Initial-2-channel-stereo-suppo.patch | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0075-Allo-Piano-DAC-boards-Initial-2-channel-stereo-suppo.patch b/target/linux/brcm2708/patches-4.19/950-0075-Allo-Piano-DAC-boards-Initial-2-channel-stereo-suppo.patch new file mode 100644 index 0000000000..3f9b69faf3 --- /dev/null +++ b/target/linux/brcm2708/patches-4.19/950-0075-Allo-Piano-DAC-boards-Initial-2-channel-stereo-suppo.patch @@ -0,0 +1,157 @@ +From befd64b81a740cba0ad23a6732dd56b2e67dda84 Mon Sep 17 00:00:00 2001 +From: Clive Messer <clive.m.messer@gmail.com> +Date: Mon, 19 Sep 2016 14:01:04 +0100 +Subject: [PATCH 075/703] Allo Piano DAC boards: Initial 2 channel (stereo) + support (#1645) + +Add initial 2 channel (stereo) support for Allo Piano DAC (2.0/2.1) boards, +using allo-piano-dac-pcm512x-audio overlay and allo-piano-dac ALSA ASoC +machine driver. + +NB. The initial support is 2 channel (stereo) ONLY! +(The Piano DAC 2.1 will only support 2 channel (stereo) left/right output, + pending an update to the upstream pcm512x codec driver, which will have + to be submitted via upstream. With the initial downstream support, + provided by this patch, the Piano DAC 2.1 subwoofer outputs will + not function.) + +Signed-off-by: Baswaraj K <jaikumar@cem-solutions.net> +Signed-off-by: Clive Messer <clive.messer@digitaldreamtime.co.uk> +Tested-by: Clive Messer <clive.messer@digitaldreamtime.co.uk> + +ASoC: allo-piano-dac: fix S24_LE format + +Remove set_bclk_ratio call so 24-bit data is transmitted in +24 bclk cycles. + +Also remove hw_params and ops as they are no longer needed. + +Signed-off-by: Matthias Reichl <hias@horus.com> +--- + sound/soc/bcm/allo-piano-dac.c | 120 +++++++++++++++++++++++++++++++++ + 1 file changed, 120 insertions(+) + create mode 100644 sound/soc/bcm/allo-piano-dac.c + +--- /dev/null ++++ b/sound/soc/bcm/allo-piano-dac.c +@@ -0,0 +1,120 @@ ++/* ++ * ALSA ASoC Machine Driver for Allo Piano DAC ++ * ++ * Author: Baswaraj K <jaikumar@cem-solutions.net> ++ * Copyright 2016 ++ * based on code by Daniel Matuschek <info@crazy-audio.com> ++ * based on code by Florian Meier <florian.meier@koalo.de> ++ * ++ * This program is free software; you can redistribute it and/or ++ * modify it under the terms of the GNU General Public License ++ * version 2 as published by the Free Software Foundation. ++ * ++ * This program is distributed in the hope that it will be useful, but ++ * WITHOUT ANY WARRANTY; without even the implied warranty of ++ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU ++ * General Public License for more details. ++ */ ++ ++#include <linux/module.h> ++#include <linux/platform_device.h> ++ ++#include <sound/core.h> ++#include <sound/pcm.h> ++#include <sound/pcm_params.h> ++#include <sound/soc.h> ++ ++static bool digital_gain_0db_limit = true; ++ ++static int snd_allo_piano_dac_init(struct snd_soc_pcm_runtime *rtd) ++{ ++ if (digital_gain_0db_limit) { ++ int ret; ++ struct snd_soc_card *card = rtd->card; ++ ++ ret = snd_soc_limit_volume(card, "Digital Playback Volume", ++ 207); ++ if (ret < 0) ++ dev_warn(card->dev, "Failed to set volume limit: %d\n", ++ ret); ++ } ++ ++ return 0; ++} ++ ++static struct snd_soc_dai_link snd_allo_piano_dac_dai[] = { ++{ ++ .name = "Piano DAC", ++ .stream_name = "Piano DAC HiFi", ++ .cpu_dai_name = "bcm2708-i2s.0", ++ .codec_dai_name = "pcm512x-hifi", ++ .platform_name = "bcm2708-i2s.0", ++ .codec_name = "pcm512x.1-004c", ++ .dai_fmt = SND_SOC_DAIFMT_I2S | ++ SND_SOC_DAIFMT_NB_NF | ++ SND_SOC_DAIFMT_CBS_CFS, ++ .init = snd_allo_piano_dac_init, ++}, ++}; ++ ++/* audio machine driver */ ++static struct snd_soc_card snd_allo_piano_dac = { ++ .name = "PianoDAC", ++ .owner = THIS_MODULE, ++ .dai_link = snd_allo_piano_dac_dai, ++ .num_links = ARRAY_SIZE(snd_allo_piano_dac_dai), ++}; ++ ++static int snd_allo_piano_dac_probe(struct platform_device *pdev) ++{ ++ int ret = 0; ++ ++ snd_allo_piano_dac.dev = &pdev->dev; ++ ++ if (pdev->dev.of_node) { ++ struct device_node *i2s_node; ++ struct snd_soc_dai_link *dai; ++ ++ dai = &snd_allo_piano_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, "allo,24db_digital_gain"); ++ } ++ ++ ret = devm_snd_soc_register_card(&pdev->dev, &snd_allo_piano_dac); ++ if (ret && ret != -EPROBE_DEFER) ++ dev_err(&pdev->dev, ++ "snd_soc_register_card() failed: %d\n", ret); ++ ++ return ret; ++} ++ ++static const struct of_device_id snd_allo_piano_dac_of_match[] = { ++ { .compatible = "allo,piano-dac", }, ++ { /* sentinel */ }, ++}; ++MODULE_DEVICE_TABLE(of, snd_allo_piano_dac_of_match); ++ ++static struct platform_driver snd_allo_piano_dac_driver = { ++ .driver = { ++ .name = "snd-allo-piano-dac", ++ .owner = THIS_MODULE, ++ .of_match_table = snd_allo_piano_dac_of_match, ++ }, ++ .probe = snd_allo_piano_dac_probe, ++}; ++ ++module_platform_driver(snd_allo_piano_dac_driver); ++ ++MODULE_AUTHOR("Baswaraj K <jaikumar@cem-solutions.net>"); ++MODULE_DESCRIPTION("ALSA ASoC Machine Driver for Allo Piano DAC"); ++MODULE_LICENSE("GPL v2"); |