diff options
Diffstat (limited to 'sound/soc/fsl/imx-hdmi.c')
-rw-r--r-- | sound/soc/fsl/imx-hdmi.c | 114 |
1 files changed, 114 insertions, 0 deletions
diff --git a/sound/soc/fsl/imx-hdmi.c b/sound/soc/fsl/imx-hdmi.c new file mode 100644 index 000000000000..e99a1ed81956 --- /dev/null +++ b/sound/soc/fsl/imx-hdmi.c @@ -0,0 +1,114 @@ +/* + * ASoC HDMI Transmitter driver for IMX development boards + * + * Copyright (C) 2011-2016 Freescale Semiconductor, Inc. + * + * based on stmp3780_devb_hdmi.c + * + * Vladimir Barinov <vbarinov@embeddedalley.com> + * + * Copyright 2008 SigmaTel, Inc + * Copyright 2008 Embedded Alley Solutions, Inc + * + * This file is licensed under the terms of the GNU General Public License + * version 2. This program is licensed "as is" without any warranty of any + * kind, whether express or implied. + */ + +#include <linux/module.h> +#include <linux/of_platform.h> +#include <linux/mfd/mxc-hdmi-core.h> +#include <sound/soc.h> + +#include "imx-hdmi.h" + +/* imx digital audio interface glue - connects codec <--> CPU */ +static struct snd_soc_dai_link imx_hdmi_dai_link = { + .name = "i.MX HDMI Audio Tx", + .stream_name = "i.MX HDMI Audio Tx", + .codec_dai_name = "hdmi-hifi.0", + .codec_name = "hdmi-audio-codec", + .platform_name = "imx-hdmi-audio", +}; + +static struct snd_soc_card snd_soc_card_imx_hdmi = { + .name = "imx-hdmi-soc", + .dai_link = &imx_hdmi_dai_link, + .num_links = 1, + .owner = THIS_MODULE, +}; + +static int imx_hdmi_audio_probe(struct platform_device *pdev) +{ + struct device_node *hdmi_np, *np = pdev->dev.of_node; + struct snd_soc_card *card = &snd_soc_card_imx_hdmi; + struct platform_device *hdmi_pdev; + int ret = 0; + + if (!hdmi_get_registered()) { + dev_err(&pdev->dev, "initialize HDMI-audio failed. load HDMI-video first!\n"); + return -ENODEV; + } + + hdmi_np = of_parse_phandle(np, "hdmi-controller", 0); + if (!hdmi_np) { + dev_err(&pdev->dev, "failed to find hdmi-audio cpudai\n"); + ret = -EINVAL; + goto end; + } + + hdmi_pdev = of_find_device_by_node(hdmi_np); + if (!hdmi_pdev) { + dev_err(&pdev->dev, "failed to find SSI platform device\n"); + ret = -EINVAL; + goto end; + } + + card->dev = &pdev->dev; + card->dai_link->cpu_dai_name = dev_name(&hdmi_pdev->dev); + + platform_set_drvdata(pdev, card); + + ret = snd_soc_register_card(card); + if (ret) + dev_err(&pdev->dev, "failed to register card: %d\n", ret); + +end: + if (hdmi_np) + of_node_put(hdmi_np); + + return ret; +} + +static int imx_hdmi_audio_remove(struct platform_device *pdev) +{ + struct snd_soc_card *card = platform_get_drvdata(pdev); + + snd_soc_unregister_card(card); + + return 0; +} + +static const struct of_device_id imx_hdmi_dt_ids[] = { + { .compatible = "fsl,imx-audio-hdmi", }, + { /* sentinel */ } +}; +MODULE_DEVICE_TABLE(of, imx_hdmi_dt_ids); + +static struct platform_driver imx_hdmi_audio_driver = { + .probe = imx_hdmi_audio_probe, + .remove = imx_hdmi_audio_remove, + .driver = { + .of_match_table = imx_hdmi_dt_ids, + .name = "imx-audio-hdmi", + .owner = THIS_MODULE, + .pm = &snd_soc_pm_ops, + }, +}; + +module_platform_driver(imx_hdmi_audio_driver); + +MODULE_AUTHOR("Freescale Semiconductor, Inc."); +MODULE_DESCRIPTION("IMX HDMI TX ASoC driver"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS("platform:imx-audio-hdmi"); |