From: Rongjun Ying rongjun.ying@csr.com
This connects platform DAI, hdmi audio codec DAI and SiRF I2S DAI together and works as a mach driver.
Signed-off-by: Rongjun Ying rongjun.ying@csr.com --- .../devicetree/bindings/sound/sirf-hdmi.txt | 15 +++ sound/soc/sirf/Kconfig | 6 + sound/soc/sirf/Makefile | 2 + sound/soc/sirf/sirf-hdmi.c | 98 ++++++++++++++++++++ 4 files changed, 121 insertions(+), 0 deletions(-) create mode 100644 Documentation/devicetree/bindings/sound/sirf-hdmi.txt create mode 100644 sound/soc/sirf/sirf-hdmi.c
diff --git a/Documentation/devicetree/bindings/sound/sirf-hdmi.txt b/Documentation/devicetree/bindings/sound/sirf-hdmi.txt new file mode 100644 index 0000000..3b6eb2a --- /dev/null +++ b/Documentation/devicetree/bindings/sound/sirf-hdmi.txt @@ -0,0 +1,15 @@ +* SiRF atlas6/prima2 hdmi audio codec based audio setups + +Required properties: +- compatible: "sirf,sirf-hdmi" +- sirf,i2s-controller: The phandle of the SiRF I2S controller. +- sirf,hdmi-audio-codec: The phandle of the hdmi audio codec. + +Example: + +sirf-hdmi { + compatible = "sirf,hdmi-card"; + sirf,i2s-controller = <&i2s>; + sirf,hdmi-audio-codec = <&hdmi_audio>; +}; + diff --git a/sound/soc/sirf/Kconfig b/sound/soc/sirf/Kconfig index 2fca80a..dc7c71e 100644 --- a/sound/soc/sirf/Kconfig +++ b/sound/soc/sirf/Kconfig @@ -16,3 +16,9 @@ config SND_SOC_SIRF_AUDIO config SND_SOC_SIRF_I2S select REGMAP_MMIO tristate + +config SND_SOC_SIRF_HDMI + tristate "SoC Audio support for SiRF HDMI" + depends on SND_SOC_SIRF + select SND_SOC_SIRF_I2S + select SND_SOC_HDMI_CODEC diff --git a/sound/soc/sirf/Makefile b/sound/soc/sirf/Makefile index 2de3cf8..ef28a38 100644 --- a/sound/soc/sirf/Makefile +++ b/sound/soc/sirf/Makefile @@ -1,7 +1,9 @@ snd-soc-sirf-audio-port-objs := sirf-audio-port.o snd-soc-sirf-audio-objs := sirf-audio.o snd-soc-sirf-i2s-objs := sirf-i2s.o +snd-soc-sirf-hdmi-objs := sirf-hdmi.o
obj-$(CONFIG_SND_SOC_SIRF_AUDIO_PORT) += snd-soc-sirf-audio-port.o obj-$(CONFIG_SND_SOC_SIRF_AUDIO) += snd-soc-sirf-audio.o obj-$(CONFIG_SND_SOC_SIRF_I2S) += snd-soc-sirf-i2s.o +obj-$(CONFIG_SND_SOC_SIRF_HDMI) += snd-soc-sirf-hdmi.o diff --git a/sound/soc/sirf/sirf-hdmi.c b/sound/soc/sirf/sirf-hdmi.c new file mode 100644 index 0000000..a581ec4 --- /dev/null +++ b/sound/soc/sirf/sirf-hdmi.c @@ -0,0 +1,98 @@ +/* + * SIRF HDMI ALSA SoC Audio board driver + * + * Copyright (c) 2013 Cambridge Silicon Radio Limited, a CSR plc group company. + * + * Licensed under GPLv2 or later. + */ + +#include <linux/module.h> +#include <linux/of.h> + +#include <sound/soc.h> + +static int sirf_hdmi_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params) +{ + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct snd_soc_dai *cpu_dai = rtd->cpu_dai; + struct snd_soc_codec *codec = rtd->codec; + struct snd_soc_card *card = codec->card; + unsigned int fmt; + int ret; + + fmt = card->dai_link[0].dai_fmt; + + ret = snd_soc_dai_set_fmt(cpu_dai, fmt); + if (ret < 0) { + dev_err(card->dev, "can't set cpu DAI configuration\n"); + return ret; + } + + return 0; +} + +static struct snd_soc_ops sirf_hdmi_ops = { + .hw_params = sirf_hdmi_hw_params, +}; +/* Digital audio interface glue - connects codec <--> CPU */ +static struct snd_soc_dai_link sirf_hdmi_dai_links[] = { + { + .name = "SiRF HDMI", + .stream_name = "SiRF HDMI", + .codec_dai_name = "hdmi-hifi", + .ops = &sirf_hdmi_ops, + }, +}; + +static struct snd_soc_card snd_soc_sirf_hdmi_card = { + .name = "SiRF HDMI", + .owner = THIS_MODULE, + .dai_link = sirf_hdmi_dai_links, + .num_links = ARRAY_SIZE(sirf_hdmi_dai_links), +}; + +static int sirf_hdmi_card_probe(struct platform_device *pdev) +{ + struct snd_soc_card *card = &snd_soc_sirf_hdmi_card; + int ret; + sirf_hdmi_dai_links[0].cpu_of_node = + of_parse_phandle(pdev->dev.of_node, "sirf,i2s-controller", 0); + sirf_hdmi_dai_links[0].platform_of_node = + of_parse_phandle(pdev->dev.of_node, "sirf,i2s-controller", 0); + sirf_hdmi_dai_links[0].codec_of_node = + of_parse_phandle(pdev->dev.of_node, "sirf,hdmi-audio-codec", 0); + + sirf_hdmi_dai_links[0].dai_fmt = SND_SOC_DAIFMT_CBM_CFM | + SND_SOC_DAIFMT_I2S; + + card->dev = &pdev->dev; + + ret = devm_snd_soc_register_card(&pdev->dev, card); + if (ret) + dev_err(&pdev->dev, "snd_soc_register_card() failed:%d\n", ret); + + return ret; +} + +static const struct of_device_id sirf_hdmi_card_of_match[] = { + { .compatible = "sirf,hdmi-card", }, + {} +}; +MODULE_DEVICE_TABLE(of, sirf_hdmi_card_of_match); + +static struct platform_driver sirf_hdmi_card_driver = { + .driver = { + .name = "sirf-hdmi-card", + .owner = THIS_MODULE, + .pm = &snd_soc_pm_ops, + .of_match_table = sirf_hdmi_card_of_match, + }, + .probe = sirf_hdmi_card_probe, +}; + +module_platform_driver(sirf_hdmi_card_driver); + +MODULE_DESCRIPTION("SIRF HDMI ALSA SoC Audio board driver"); +MODULE_AUTHOR("RongJun Ying Rongjun.Ying@csr.com"); +MODULE_LICENSE("GPL v2");