forked from luck/tmp_suning_uos_patched
130 lines
3.3 KiB
C
130 lines
3.3 KiB
C
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/*
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* omap4-hdmi-card.c
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*
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* OMAP ALSA SoC machine driver for TI OMAP4 HDMI
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* Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
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* Author: Ricardo Neri <ricardo.neri@ti.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*
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*/
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#include <sound/pcm.h>
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#include <sound/soc.h>
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#include <asm/mach-types.h>
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#include <video/omapdss.h>
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#define DRV_NAME "omap4-hdmi-audio"
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static int omap4_hdmi_dai_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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int i;
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struct omap_overlay_manager *mgr = NULL;
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struct device *dev = substream->pcm->card->dev;
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/* Find DSS HDMI device */
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for (i = 0; i < omap_dss_get_num_overlay_managers(); i++) {
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mgr = omap_dss_get_overlay_manager(i);
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if (mgr && mgr->device
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&& mgr->device->type == OMAP_DISPLAY_TYPE_HDMI)
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break;
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}
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if (i == omap_dss_get_num_overlay_managers()) {
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dev_err(dev, "HDMI display device not found!\n");
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return -ENODEV;
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}
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/* Make sure HDMI is power-on to avoid L3 interconnect errors */
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if (mgr->device->state != OMAP_DSS_DISPLAY_ACTIVE) {
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dev_err(dev, "HDMI display is not active!\n");
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return -EIO;
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}
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return 0;
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}
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static struct snd_soc_ops omap4_hdmi_dai_ops = {
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.hw_params = omap4_hdmi_dai_hw_params,
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};
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static struct snd_soc_dai_link omap4_hdmi_dai = {
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.name = "HDMI",
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.stream_name = "HDMI",
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.cpu_dai_name = "hdmi-audio-dai",
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.platform_name = "omap-pcm-audio",
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.codec_name = "omapdss_hdmi",
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.codec_dai_name = "hdmi-audio-codec",
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.ops = &omap4_hdmi_dai_ops,
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};
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static struct snd_soc_card snd_soc_omap4_hdmi = {
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.name = "OMAP4HDMI",
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.dai_link = &omap4_hdmi_dai,
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.num_links = 1,
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};
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static __devinit int omap4_hdmi_probe(struct platform_device *pdev)
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{
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struct snd_soc_card *card = &snd_soc_omap4_hdmi;
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int ret;
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card->dev = &pdev->dev;
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ret = snd_soc_register_card(card);
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if (ret) {
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dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
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card->dev = NULL;
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return ret;
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}
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return 0;
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}
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static int __devexit omap4_hdmi_remove(struct platform_device *pdev)
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{
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struct snd_soc_card *card = platform_get_drvdata(pdev);
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snd_soc_unregister_card(card);
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card->dev = NULL;
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return 0;
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}
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static struct platform_driver omap4_hdmi_driver = {
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.driver = {
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.name = "omap4-hdmi-audio",
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.owner = THIS_MODULE,
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},
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.probe = omap4_hdmi_probe,
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.remove = __devexit_p(omap4_hdmi_remove),
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};
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static int __init omap4_hdmi_init(void)
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{
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return platform_driver_register(&omap4_hdmi_driver);
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}
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module_init(omap4_hdmi_init);
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static void __exit omap4_hdmi_exit(void)
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{
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platform_driver_unregister(&omap4_hdmi_driver);
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}
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module_exit(omap4_hdmi_exit);
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MODULE_AUTHOR("Ricardo Neri <ricardo.neri@ti.com>");
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MODULE_DESCRIPTION("OMAP4 HDMI machine ASoC driver");
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MODULE_LICENSE("GPL");
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MODULE_ALIAS("platform:" DRV_NAME);
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