1 files changed, 129 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 000000000000..9f32615b81f7
--- /dev/null
+++ b/sound/soc/omap/omap4-hdmi-card.c
@@ -0,0 +1,129 @@
+/*
+ * 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 <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",
+        .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),
+};
+
+static int __init omap4_hdmi_init(void)
+{
+        return platform_driver_register(&omap4_hdmi_driver);
+}
+module_init(omap4_hdmi_init);
+
+static void __exit omap4_hdmi_exit(void)
+{
+        platform_driver_unregister(&omap4_hdmi_driver);
+}
+module_exit(omap4_hdmi_exit);
+
+MODULE_AUTHOR("Ricardo Neri <ricardo.neri@ti.com>");
+MODULE_DESCRIPTION("OMAP4 HDMI machine ASoC driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" DRV_NAME);