On 11/12/2014 12:49 PM, Jyri Sarha wrote: > The platform device should only be registered from OMAPDSS HDMI > driver. The platform driver registers and unregisters all ASoC > components needed for OMAP HDMI audio. > > The hdmi audio driver implements cpu-dai component using the callbacks > provided by OMAPDSS and registers the component under DSS HDMI > device. Omap-pcm is registered for platform component also under DSS > HDMI device. Dummy codec is used as as codec component. The hdmi audio > driver implements also the card and registers it under its own > platform device. > > Signed-off-by: Jyri Sarha <[email protected]>
Acked-by: Peter Ujfalusi <[email protected]> > --- > include/sound/omap-hdmi-audio.h | 43 ++++ > sound/soc/omap/Kconfig | 15 ++ > sound/soc/omap/Makefile | 2 + > sound/soc/omap/omap-hdmi-audio.c | 407 > ++++++++++++++++++++++++++++++++++++++ > 4 files changed, 467 insertions(+) > create mode 100644 include/sound/omap-hdmi-audio.h > create mode 100644 sound/soc/omap/omap-hdmi-audio.c > > diff --git a/include/sound/omap-hdmi-audio.h b/include/sound/omap-hdmi-audio.h > new file mode 100644 > index 0000000..afdb416 > --- /dev/null > +++ b/include/sound/omap-hdmi-audio.h > @@ -0,0 +1,43 @@ > +/* > + * hdmi-audio.c -- OMAP4+ DSS HDMI audio support library > + * > + * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com > + * > + * Author: Jyri Sarha <[email protected]> > + * > + * 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. > + * > + */ > + > +#include <video/omapdss.h> > + > +#ifndef __OMAP_HDMI_AUDIO_H__ > +#define __OMAP_HDMI_AUDIO_H__ > + > +struct omap_hdmi_audio_ops { > + int (*audio_startup)(struct device *dev, > + void (*abort_cb)(struct device *dev)); > + int (*audio_shutdown)(struct device *dev); > + int (*audio_start)(struct device *dev); > + void (*audio_stop)(struct device *dev); > + int (*audio_config)(struct device *dev, > + struct omap_dss_audio *dss_audio); > +}; > + > +/* HDMI audio initalization data */ > +struct omap_hdmi_audio_pdata { > + struct device *dev; > + enum omapdss_version dss_version; > + phys_addr_t audio_dma_addr; > + > + const struct omap_hdmi_audio_ops *ops; > +}; > + > +#endif /* __OMAP_HDMI_AUDIO_H__ */ > diff --git a/sound/soc/omap/Kconfig b/sound/soc/omap/Kconfig > index d44463a..2b32b3e 100644 > --- a/sound/soc/omap/Kconfig > +++ b/sound/soc/omap/Kconfig > @@ -15,6 +15,21 @@ config SND_OMAP_SOC_MCPDM > config SND_OMAP_SOC_HDMI > tristate > > +config SND_OMAP_SOC_HDMI_AUDIO > + tristate "HDMI audio support for OMAP4+ based SoCs" > + depends on SND_OMAP_SOC > + help > + For HDMI audio to work OMAPDSS HDMI support should be > + enabled. > + The hdmi audio driver implements cpu-dai component using the > + callbacks provided by OMAPDSS and registers the component > + under DSS HDMI device. Omap-pcm is registered for platform > + component also under DSS HDMI device. Dummy codec is used as > + as codec component. The hdmi audio driver implements also > + the card and registers it under its own platform device. > + The device for the dirver is registered by OMAPDSS hdmi > + driver. > + > config SND_OMAP_SOC_N810 > tristate "SoC Audio support for Nokia N810" > depends on SND_OMAP_SOC && MACH_NOKIA_N810 && I2C > diff --git a/sound/soc/omap/Makefile b/sound/soc/omap/Makefile > index a725905..40688a6 100644 > --- a/sound/soc/omap/Makefile > +++ b/sound/soc/omap/Makefile > @@ -4,12 +4,14 @@ snd-soc-omap-dmic-objs := omap-dmic.o > snd-soc-omap-mcbsp-objs := omap-mcbsp.o mcbsp.o > snd-soc-omap-mcpdm-objs := omap-mcpdm.o > snd-soc-omap-hdmi-objs := omap-hdmi.o > +snd-soc-omap-hdmi-audio-objs := omap-hdmi-audio.o > > obj-$(CONFIG_SND_OMAP_SOC) += snd-soc-omap.o > obj-$(CONFIG_SND_OMAP_SOC_DMIC) += snd-soc-omap-dmic.o > obj-$(CONFIG_SND_OMAP_SOC_MCBSP) += snd-soc-omap-mcbsp.o > obj-$(CONFIG_SND_OMAP_SOC_MCPDM) += snd-soc-omap-mcpdm.o > obj-$(CONFIG_SND_OMAP_SOC_HDMI) += snd-soc-omap-hdmi.o > +obj-$(CONFIG_SND_OMAP_SOC_HDMI_AUDIO) += snd-soc-omap-hdmi-audio.o > > # OMAP Machine Support > snd-soc-n810-objs := n810.o > diff --git a/sound/soc/omap/omap-hdmi-audio.c > b/sound/soc/omap/omap-hdmi-audio.c > new file mode 100644 > index 0000000..3f9ac7d > --- /dev/null > +++ b/sound/soc/omap/omap-hdmi-audio.c > @@ -0,0 +1,407 @@ > +/* > + * omap-hdmi-audio.c -- OMAP4+ DSS HDMI audio support library > + * > + * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com > + * > + * Author: Jyri Sarha <[email protected]> > + * > + * 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. > + * > + */ > + > +#include <linux/kernel.h> > +#include <linux/module.h> > +#include <linux/err.h> > +#include <linux/string.h> > +#include <linux/platform_device.h> > +#include <sound/soc.h> > +#include <sound/pcm_params.h> > +#include <sound/dmaengine_pcm.h> > +#include <uapi/sound/asound.h> > +#include <sound/asoundef.h> > +#include <sound/omap-pcm.h> > +#include <sound/omap-hdmi-audio.h> > +#include <video/omapdss.h> > + > +#define DRV_NAME "omap-hdmi-audio" > + > +struct hdmi_audio_data { > + struct snd_soc_card *card; > + > + const struct omap_hdmi_audio_ops *ops; > + struct device *dssdev; > + struct snd_dmaengine_dai_dma_data dma_data; > + struct omap_dss_audio dss_audio; > + struct snd_aes_iec958 iec; > + struct snd_cea_861_aud_if cea; > + > + struct mutex current_stream_lock; > + struct snd_pcm_substream *current_stream; > +}; > + > +static > +struct hdmi_audio_data *card_drvdata_substream(struct snd_pcm_substream *ss) > +{ > + struct snd_soc_pcm_runtime *rtd = ss->private_data; > + > + return snd_soc_card_get_drvdata(rtd->card); > +} > + > +static void hdmi_dai_abort(struct device *dev) > +{ > + struct hdmi_audio_data *ad = dev_get_drvdata(dev); > + > + mutex_lock(&ad->current_stream_lock); > + if (ad->current_stream && ad->current_stream->runtime && > + snd_pcm_running(ad->current_stream)) { > + dev_err(dev, "HDMI display disabled, aborting playback\n"); > + snd_pcm_stream_lock_irq(ad->current_stream); > + snd_pcm_stop(ad->current_stream, SNDRV_PCM_STATE_DISCONNECTED); > + snd_pcm_stream_unlock_irq(ad->current_stream); > + } > + mutex_unlock(&ad->current_stream_lock); > +} > + > +static int hdmi_dai_startup(struct snd_pcm_substream *substream, > + struct snd_soc_dai *dai) > +{ > + struct hdmi_audio_data *ad = card_drvdata_substream(substream); > + int ret; > + /* > + * Make sure that the period bytes are multiple of the DMA packet size. > + * Largest packet size we use is 32 32-bit words = 128 bytes > + */ > + ret = snd_pcm_hw_constraint_step(substream->runtime, 0, > + SNDRV_PCM_HW_PARAM_PERIOD_BYTES, 128); > + if (ret < 0) { > + dev_err(dai->dev, "could not apply constraint\n"); > + return ret; > + } > + > + snd_soc_dai_set_dma_data(dai, substream, &ad->dma_data); > + > + mutex_lock(&ad->current_stream_lock); > + ad->current_stream = substream; > + mutex_unlock(&ad->current_stream_lock); > + > + ret = ad->ops->audio_startup(ad->dssdev, hdmi_dai_abort); > + > + if (ret) { > + mutex_lock(&ad->current_stream_lock); > + ad->current_stream = NULL; > + mutex_unlock(&ad->current_stream_lock); > + } > + > + return ret; > +} > + > +static int hdmi_dai_hw_params(struct snd_pcm_substream *substream, > + struct snd_pcm_hw_params *params, > + struct snd_soc_dai *dai) > +{ > + struct hdmi_audio_data *ad = card_drvdata_substream(substream); > + struct snd_aes_iec958 *iec = &ad->iec; > + struct snd_cea_861_aud_if *cea = &ad->cea; > + > + WARN_ON(ad->current_stream != substream); > + > + switch (params_format(params)) { > + case SNDRV_PCM_FORMAT_S16_LE: > + ad->dma_data.maxburst = 16; > + break; > + case SNDRV_PCM_FORMAT_S24_LE: > + ad->dma_data.maxburst = 32; > + break; > + default: > + dev_err(dai->dev, "format not supported!\n"); > + return -EINVAL; > + } > + > + ad->dss_audio.iec = iec; > + ad->dss_audio.cea = cea; > + /* > + * fill the IEC-60958 channel status word > + */ > + /* initialize the word bytes */ > + memset(iec->status, 0, sizeof(iec->status)); > + > + /* 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); > + > + return ad->ops->audio_config(ad->dssdev, &ad->dss_audio); > +} > + > +static int hdmi_dai_trigger(struct snd_pcm_substream *substream, int cmd, > + struct snd_soc_dai *dai) > +{ > + struct hdmi_audio_data *ad = card_drvdata_substream(substream); > + int err = 0; > + > + WARN_ON(ad->current_stream != substream); > + > + switch (cmd) { > + case SNDRV_PCM_TRIGGER_START: > + case SNDRV_PCM_TRIGGER_RESUME: > + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: > + err = ad->ops->audio_start(ad->dssdev); > + break; > + case SNDRV_PCM_TRIGGER_STOP: > + case SNDRV_PCM_TRIGGER_SUSPEND: > + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: > + ad->ops->audio_stop(ad->dssdev); > + break; > + default: > + err = -EINVAL; > + } > + return err; > +} > + > +static void hdmi_dai_shutdown(struct snd_pcm_substream *substream, > + struct snd_soc_dai *dai) > +{ > + struct hdmi_audio_data *ad = card_drvdata_substream(substream); > + > + WARN_ON(ad->current_stream != substream); > + > + ad->ops->audio_shutdown(ad->dssdev); > + > + mutex_lock(&ad->current_stream_lock); > + ad->current_stream = NULL; > + mutex_unlock(&ad->current_stream_lock); > +} > + > +static const struct snd_soc_dai_ops hdmi_dai_ops = { > + .startup = hdmi_dai_startup, > + .hw_params = hdmi_dai_hw_params, > + .trigger = hdmi_dai_trigger, > + .shutdown = hdmi_dai_shutdown, > +}; > + > +static const struct snd_soc_component_driver omap_hdmi_component = { > + .name = "omapdss_hdmi", > +}; > + > +static struct snd_soc_dai_driver omap5_hdmi_dai = { > + .name = "omap5-hdmi-dai", > + .playback = { > + .channels_min = 2, > + .channels_max = 8, > + .rates = (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | > + SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | > + SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 | > + SNDRV_PCM_RATE_192000), > + .formats = SNDRV_PCM_FMTBIT_S16_LE, > + }, > + .ops = &hdmi_dai_ops, > +}; > + > +static struct snd_soc_dai_driver omap4_hdmi_dai = { > + .name = "omap4-hdmi-dai", > + .playback = { > + .channels_min = 2, > + .channels_max = 8, > + .rates = (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | > + SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | > + SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 | > + SNDRV_PCM_RATE_192000), > + .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE, > + }, > + .ops = &hdmi_dai_ops, > +}; > + > +static int omap_hdmi_audio_probe(struct platform_device *pdev) > +{ > + struct omap_hdmi_audio_pdata *ha = pdev->dev.platform_data; > + struct device *dev = &pdev->dev; > + struct hdmi_audio_data *ad; > + struct snd_soc_dai_driver *dai_drv; > + struct snd_soc_card *card; > + int ret; > + > + if (!ha) { > + dev_err(dev, "No platform data\n"); > + return -EINVAL; > + } > + > + ad = devm_kzalloc(dev, sizeof(*ad), GFP_KERNEL); > + if (!ad) > + return -ENOMEM; > + ad->dssdev = ha->dev; > + ad->ops = ha->ops; > + ad->dma_data.addr = ha->audio_dma_addr; > + ad->dma_data.filter_data = "audio_tx"; > + ad->dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; > + mutex_init(&ad->current_stream_lock); > + > + switch (ha->dss_version) { > + case OMAPDSS_VER_OMAP4430_ES1: > + case OMAPDSS_VER_OMAP4430_ES2: > + case OMAPDSS_VER_OMAP4: > + dai_drv = &omap4_hdmi_dai; > + break; > + case OMAPDSS_VER_OMAP5: > + dai_drv = &omap5_hdmi_dai; > + break; > + default: > + return -EINVAL; > + } > + ret = snd_soc_register_component(ad->dssdev, &omap_hdmi_component, > + dai_drv, 1); > + if (ret) > + return ret; > + > + ret = omap_pcm_platform_register(ad->dssdev); > + if (ret) > + return ret; > + > + card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL); > + card->name = devm_kasprintf(dev, GFP_KERNEL, > + "HDMI %s", dev_name(ad->dssdev)); > + card->owner = THIS_MODULE; > + card->dai_link = > + devm_kzalloc(dev, sizeof(*(card->dai_link)), GFP_KERNEL); > + card->dai_link->name = card->name; > + card->dai_link->stream_name = card->name; > + card->dai_link->cpu_dai_name = dev_name(ad->dssdev); > + card->dai_link->platform_name = dev_name(ad->dssdev); > + card->dai_link->codec_name = "snd-soc-dummy"; > + card->dai_link->codec_dai_name = "snd-soc-dummy-dai"; > + card->num_links = 1; > + card->dev = dev; > + > + ret = snd_soc_register_card(card); > + if (ret) { > + dev_err(dev, "snd_soc_register_card failed (%d)\n", ret); > + snd_soc_unregister_component(ad->dssdev); > + return ret; > + } > + > + ad->card = card; > + snd_soc_card_set_drvdata(card, ad); > + > + dev_set_drvdata(dev, ad); > + > + return 0; > +} > + > +static int omap_hdmi_audio_remove(struct platform_device *pdev) > +{ > + struct hdmi_audio_data *ad = platform_get_drvdata(pdev); > + > + snd_soc_unregister_card(ad->card); > + snd_soc_unregister_component(ad->dssdev); > + return 0; > +} > + > +static struct platform_driver hdmi_audio_driver = { > + .driver = { > + .name = DRV_NAME, > + .owner = THIS_MODULE, > + }, > + .probe = omap_hdmi_audio_probe, > + .remove = omap_hdmi_audio_remove, > +}; > + > +module_platform_driver(hdmi_audio_driver); > + > +MODULE_AUTHOR("Jyri Sarha <[email protected]>"); > +MODULE_DESCRIPTION("OMAP HDMI Audio Driver"); > +MODULE_LICENSE("GPL"); > +MODULE_ALIAS("platform:" DRV_NAME); > -- Péter -- To unsubscribe from this list: send the line "unsubscribe linux-omap" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html
