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/*
* omap4-hdmi-card.c
*
* OMAP ALSA SoC machine driver for TI OMAP4 HDMI
* Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
* Author: Ricardo Neri <ricardo.neri@ti.com>
*
* 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.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
*/
#include <linux/module.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <asm/mach-types.h>
#include <video/omapdss.h>
#define DRV_NAME "omap4-hdmi-audio"
static int omap4_hdmi_dai_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
int i;
struct omap_overlay_manager *mgr = NULL;
struct device *dev = substream->pcm->card->dev;
/* Find DSS HDMI device */
for (i = 0; i < omap_dss_get_num_overlay_managers(); i++) {
mgr = omap_dss_get_overlay_manager(i);
if (mgr && mgr->device
&& mgr->device->type == OMAP_DISPLAY_TYPE_HDMI)
break;
}
if (i == omap_dss_get_num_overlay_managers()) {
dev_err(dev, "HDMI display device not found!\n");
return -ENODEV;
}
/* Make sure HDMI is power-on to avoid L3 interconnect errors */
if (mgr->device->state != OMAP_DSS_DISPLAY_ACTIVE) {
dev_err(dev, "HDMI display is not active!\n");
return -EIO;
}
return 0;
}
static struct snd_soc_ops omap4_hdmi_dai_ops = {
.hw_params = omap4_hdmi_dai_hw_params,
};
static struct snd_soc_dai_link omap4_hdmi_dai = {
.name = "HDMI",
.stream_name = "HDMI",
.cpu_dai_name = "hdmi-audio-dai",
.platform_name = "omap-pcm-audio",
.codec_name = "omapdss_hdmi",
.codec_dai_name = "hdmi-audio-codec",
.ops = &omap4_hdmi_dai_ops,
};
static struct snd_soc_card snd_soc_omap4_hdmi = {
.name = "OMAP4HDMI",
.owner = THIS_MODULE,
.dai_link = &omap4_hdmi_dai,
.num_links = 1,
};
static __devinit int omap4_hdmi_probe(struct platform_device *pdev)
{
struct snd_soc_card *card = &snd_soc_omap4_hdmi;
int ret;
card->dev = &pdev->dev;
ret = snd_soc_register_card(card);
if (ret) {
dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n", ret);
card->dev = NULL;
return ret;
}
return 0;
}
static int __devexit omap4_hdmi_remove(struct platform_device *pdev)
{
struct snd_soc_card *card = platform_get_drvdata(pdev);
snd_soc_unregister_card(card);
card->dev = NULL;
return 0;
}
static struct platform_driver omap4_hdmi_driver = {
.driver = {
.name = "omap4-hdmi-audio",
.owner = THIS_MODULE,
},
.probe = omap4_hdmi_probe,
.remove = __devexit_p(omap4_hdmi_remove),
};
module_platform_driver(omap4_hdmi_driver);
MODULE_AUTHOR("Ricardo Neri <ricardo.neri@ti.com>");
MODULE_DESCRIPTION("OMAP4 HDMI machine ASoC driver");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:" DRV_NAME);
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