diff options
Diffstat (limited to 'sound/soc/omap/omap4-hdmi-card.c')
| -rw-r--r-- | sound/soc/omap/omap4-hdmi-card.c | 121 |
1 files changed, 121 insertions, 0 deletions
diff --git a/sound/soc/omap/omap4-hdmi-card.c b/sound/soc/omap/omap4-hdmi-card.c new file mode 100644 index 00000000..28d689b2 --- /dev/null +++ b/sound/soc/omap/omap4-hdmi-card.c @@ -0,0 +1,121 @@ +/* + * 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); |