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Diffstat (limited to 'sound/soc/omap/omap-hdmi.c')
-rw-r--r--sound/soc/omap/omap-hdmi.c238
1 files changed, 223 insertions, 15 deletions
diff --git a/sound/soc/omap/omap-hdmi.c b/sound/soc/omap/omap-hdmi.c
index 38e0defa707..a08245d9203 100644
--- a/sound/soc/omap/omap-hdmi.c
+++ b/sound/soc/omap/omap-hdmi.c
@@ -30,21 +30,28 @@
#include <sound/pcm_params.h>
#include <sound/initval.h>
#include <sound/soc.h>
+#include <sound/asound.h>
+#include <sound/asoundef.h>
+#include <video/omapdss.h>
#include <plat/dma.h>
#include "omap-pcm.h"
#include "omap-hdmi.h"
-#define DRV_NAME "hdmi-audio-dai"
+#define DRV_NAME "omap-hdmi-audio-dai"
-static struct omap_pcm_dma_data omap_hdmi_dai_dma_params = {
- .name = "HDMI playback",
- .sync_mode = OMAP_DMA_SYNC_PACKET,
+struct hdmi_priv {
+ struct omap_pcm_dma_data dma_params;
+ struct omap_dss_audio dss_audio;
+ struct snd_aes_iec958 iec;
+ struct snd_cea_861_aud_if cea;
+ struct omap_dss_device *dssdev;
};
static int omap_hdmi_dai_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
+ struct hdmi_priv *priv = snd_soc_dai_get_drvdata(dai);
int err;
/*
* Make sure that the period bytes are multiple of the DMA packet size.
@@ -52,46 +59,201 @@ static int omap_hdmi_dai_startup(struct snd_pcm_substream *substream,
*/
err = snd_pcm_hw_constraint_step(substream->runtime, 0,
SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 128);
- if (err < 0)
+ if (err < 0) {
+ dev_err(dai->dev, "could not apply constraint\n");
return err;
+ }
+ if (!priv->dssdev->driver->audio_supported(priv->dssdev)) {
+ dev_err(dai->dev, "audio not supported\n");
+ return -ENODEV;
+ }
return 0;
}
+static int omap_hdmi_dai_prepare(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct hdmi_priv *priv = snd_soc_dai_get_drvdata(dai);
+
+ return priv->dssdev->driver->audio_enable(priv->dssdev);
+}
+
static int omap_hdmi_dai_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
+ struct hdmi_priv *priv = snd_soc_dai_get_drvdata(dai);
+ struct snd_aes_iec958 *iec = &priv->iec;
+ struct snd_cea_861_aud_if *cea = &priv->cea;
int err = 0;
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
- omap_hdmi_dai_dma_params.packet_size = 16;
+ priv->dma_params.packet_size = 16;
break;
case SNDRV_PCM_FORMAT_S24_LE:
- omap_hdmi_dai_dma_params.packet_size = 32;
+ priv->dma_params.packet_size = 32;
break;
default:
- err = -EINVAL;
+ dev_err(dai->dev, "format not supported!\n");
+ return -EINVAL;
}
- omap_hdmi_dai_dma_params.data_type = OMAP_DMA_DATA_TYPE_S32;
+ priv->dma_params.data_type = OMAP_DMA_DATA_TYPE_S32;
snd_soc_dai_set_dma_data(dai, substream,
- &omap_hdmi_dai_dma_params);
+ &priv->dma_params);
+
+ /*
+ * fill the IEC-60958 channel status word
+ */
+
+ /* specify IEC-60958-3 (commercial use) */
+ iec->status[0] &= ~IEC958_AES0_PROFESSIONAL;
+
+ /* specify that the audio is LPCM*/
+ iec->status[0] &= ~IEC958_AES0_NONAUDIO;
+
+ iec->status[0] |= IEC958_AES0_CON_NOT_COPYRIGHT;
+
+ iec->status[0] |= IEC958_AES0_CON_EMPHASIS_NONE;
+
+ iec->status[0] |= IEC958_AES1_PRO_MODE_NOTID;
+
+ iec->status[1] = IEC958_AES1_CON_GENERAL;
+
+ iec->status[2] |= IEC958_AES2_CON_SOURCE_UNSPEC;
+
+ iec->status[2] |= IEC958_AES2_CON_CHANNEL_UNSPEC;
+
+ switch (params_rate(params)) {
+ case 32000:
+ iec->status[3] |= IEC958_AES3_CON_FS_32000;
+ break;
+ case 44100:
+ iec->status[3] |= IEC958_AES3_CON_FS_44100;
+ break;
+ case 48000:
+ iec->status[3] |= IEC958_AES3_CON_FS_48000;
+ break;
+ case 88200:
+ iec->status[3] |= IEC958_AES3_CON_FS_88200;
+ break;
+ case 96000:
+ iec->status[3] |= IEC958_AES3_CON_FS_96000;
+ break;
+ case 176400:
+ iec->status[3] |= IEC958_AES3_CON_FS_176400;
+ break;
+ case 192000:
+ iec->status[3] |= IEC958_AES3_CON_FS_192000;
+ break;
+ default:
+ dev_err(dai->dev, "rate not supported!\n");
+ return -EINVAL;
+ }
+
+ /* specify the clock accuracy */
+ iec->status[3] |= IEC958_AES3_CON_CLOCK_1000PPM;
+
+ /*
+ * specify the word length. The same word length value can mean
+ * two different lengths. Hence, we need to specify the maximum
+ * word length as well.
+ */
+ switch (params_format(params)) {
+ case SNDRV_PCM_FORMAT_S16_LE:
+ iec->status[4] |= IEC958_AES4_CON_WORDLEN_20_16;
+ iec->status[4] &= ~IEC958_AES4_CON_MAX_WORDLEN_24;
+ break;
+ case SNDRV_PCM_FORMAT_S24_LE:
+ iec->status[4] |= IEC958_AES4_CON_WORDLEN_24_20;
+ iec->status[4] |= IEC958_AES4_CON_MAX_WORDLEN_24;
+ break;
+ default:
+ dev_err(dai->dev, "format not supported!\n");
+ return -EINVAL;
+ }
+
+ /*
+ * Fill the CEA-861 audio infoframe (see spec for details)
+ */
+
+ cea->db1_ct_cc = (params_channels(params) - 1)
+ & CEA861_AUDIO_INFOFRAME_DB1CC;
+ cea->db1_ct_cc |= CEA861_AUDIO_INFOFRAME_DB1CT_FROM_STREAM;
+
+ cea->db2_sf_ss = CEA861_AUDIO_INFOFRAME_DB2SF_FROM_STREAM;
+ cea->db2_sf_ss |= CEA861_AUDIO_INFOFRAME_DB2SS_FROM_STREAM;
+
+ cea->db3 = 0; /* not used, all zeros */
+
+ /*
+ * The OMAP HDMI IP requires to use the 8-channel channel code when
+ * transmitting more than two channels.
+ */
+ if (params_channels(params) == 2)
+ cea->db4_ca = 0x0;
+ else
+ cea->db4_ca = 0x13;
+
+ cea->db5_dminh_lsv = CEA861_AUDIO_INFOFRAME_DB5_DM_INH_PROHIBITED;
+ /* the expression is trivial but makes clear what we are doing */
+ cea->db5_dminh_lsv |= (0 & CEA861_AUDIO_INFOFRAME_DB5_LSV);
+
+ priv->dss_audio.iec = iec;
+ priv->dss_audio.cea = cea;
+
+ err = priv->dssdev->driver->audio_config(priv->dssdev,
+ &priv->dss_audio);
return err;
}
+static int omap_hdmi_dai_trigger(struct snd_pcm_substream *substream, int cmd,
+ struct snd_soc_dai *dai)
+{
+ struct hdmi_priv *priv = snd_soc_dai_get_drvdata(dai);
+ int err = 0;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ err = priv->dssdev->driver->audio_start(priv->dssdev);
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ priv->dssdev->driver->audio_stop(priv->dssdev);
+ break;
+ default:
+ err = -EINVAL;
+ }
+ return err;
+}
+
+static void omap_hdmi_dai_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct hdmi_priv *priv = snd_soc_dai_get_drvdata(dai);
+
+ priv->dssdev->driver->audio_disable(priv->dssdev);
+}
+
static const struct snd_soc_dai_ops omap_hdmi_dai_ops = {
.startup = omap_hdmi_dai_startup,
.hw_params = omap_hdmi_dai_hw_params,
+ .prepare = omap_hdmi_dai_prepare,
+ .trigger = omap_hdmi_dai_trigger,
+ .shutdown = omap_hdmi_dai_shutdown,
};
static struct snd_soc_dai_driver omap_hdmi_dai = {
.playback = {
.channels_min = 2,
- .channels_max = 2,
+ .channels_max = 8,
.rates = OMAP_HDMI_RATES,
.formats = OMAP_HDMI_FORMATS,
},
@@ -102,31 +264,77 @@ static __devinit int omap_hdmi_probe(struct platform_device *pdev)
{
int ret;
struct resource *hdmi_rsrc;
+ struct hdmi_priv *hdmi_data;
+ bool hdmi_dev_found = false;
+
+ hdmi_data = devm_kzalloc(&pdev->dev, sizeof(*hdmi_data), GFP_KERNEL);
+ if (hdmi_data == NULL) {
+ dev_err(&pdev->dev, "Cannot allocate memory for HDMI data\n");
+ return -ENOMEM;
+ }
hdmi_rsrc = platform_get_resource(pdev, IORESOURCE_MEM, 0);
if (!hdmi_rsrc) {
dev_err(&pdev->dev, "Cannot obtain IORESOURCE_MEM HDMI\n");
- return -EINVAL;
+ return -ENODEV;
}
- omap_hdmi_dai_dma_params.port_addr = hdmi_rsrc->start
+ hdmi_data->dma_params.port_addr = hdmi_rsrc->start
+ OMAP_HDMI_AUDIO_DMA_PORT;
hdmi_rsrc = platform_get_resource(pdev, IORESOURCE_DMA, 0);
if (!hdmi_rsrc) {
dev_err(&pdev->dev, "Cannot obtain IORESOURCE_DMA HDMI\n");
- return -EINVAL;
+ return -ENODEV;
}
- omap_hdmi_dai_dma_params.dma_req = hdmi_rsrc->start;
+ hdmi_data->dma_params.dma_req = hdmi_rsrc->start;
+ hdmi_data->dma_params.name = "HDMI playback";
+ hdmi_data->dma_params.sync_mode = OMAP_DMA_SYNC_PACKET;
+
+ /*
+ * TODO: We assume that there is only one DSS HDMI device. Future
+ * OMAP implementations may support more than one HDMI devices and
+ * we should provided separate audio support for all of them.
+ */
+ /* Find an HDMI device. */
+ for_each_dss_dev(hdmi_data->dssdev) {
+ omap_dss_get_device(hdmi_data->dssdev);
+ if (!hdmi_data->dssdev->driver) {
+ omap_dss_put_device(hdmi_data->dssdev);
+ continue;
+ }
+
+ if (hdmi_data->dssdev->type == OMAP_DISPLAY_TYPE_HDMI) {
+ hdmi_dev_found = true;
+ break;
+ }
+ }
+
+ if (!hdmi_dev_found) {
+ dev_err(&pdev->dev, "no driver for HDMI display found\n");
+ return -ENODEV;
+ }
+
+ dev_set_drvdata(&pdev->dev, hdmi_data);
ret = snd_soc_register_dai(&pdev->dev, &omap_hdmi_dai);
+
return ret;
}
static int __devexit omap_hdmi_remove(struct platform_device *pdev)
{
+ struct hdmi_priv *hdmi_data = dev_get_drvdata(&pdev->dev);
+
snd_soc_unregister_dai(&pdev->dev);
+
+ if (hdmi_data == NULL) {
+ dev_err(&pdev->dev, "cannot obtain HDMi data\n");
+ return -ENODEV;
+ }
+
+ omap_dss_put_device(hdmi_data->dssdev);
return 0;
}