The library exports omap_hdmi_audio_register() and omap_hdmi_audio_unregister() functions. With the functions OMAPDSS HDMI implementation registers and unregisters all ASoC components needed for OMAP HDMI audio.
The library implements cpu-dai component using the callbacks provided by OMAPDSS. Omap-pcm is registered for platform component, dummy hdmi-audio-codec is registered for codec component, and asoc-simple-card is registered for machine driver.
Signed-off-by: Jyri Sarha jsarha@ti.com --- include/sound/omap-hdmi-audio.h | 50 ++++++ sound/soc/omap/Kconfig | 6 + sound/soc/omap/Makefile | 2 + sound/soc/omap/omap-hdmi-audio.c | 357 ++++++++++++++++++++++++++++++++++++++ 4 files changed, 415 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..0bf81f2 --- /dev/null +++ b/include/sound/omap-hdmi-audio.h @@ -0,0 +1,50 @@ +/* + * hdmi-audio.c -- OMAP4+ DSS HDMI audio support library + * + * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com + * + * Author: Jyri Sarha jsarha@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. + * + */ + +#include <video/omapdss.h> + +#ifndef __OMAP_HDMI_AUDIO_H__ +#define __OMAP_HDMI_AUDIO_H__ + +/* HDMI audio initalization data */ +struct omap_hdmi_audio { + struct device *dev; + enum { OMAP4_HDMI, OMAP5_HDMI } hw_version; + phys_addr_t audio_dma_addr; + + int (*mode_has_audio)(struct device *dev); + int (*audio_enable)(struct device *dev, bool enable); + int (*audio_start)(struct device *dev, bool enable); + int (*audio_config)(struct device *dev, + struct omap_dss_audio *dss_audio); +}; + +#if IS_ENABLED(CONFIG_SND_OMAP_SOC_HDMI_AUDIO) +int omap_hdmi_audio_register(struct omap_hdmi_audio *hdmi_audio); +void omap_hdmi_audio_unregister(struct device *dev); +#else +static inline int omap_hdmi_audio_register(struct omap_hdmi_audio *hdmi_audio) +{ + return 0; +} +static inline void omap_hdmi_audio_unregister(struct device *dev) +{ +} +#endif + +#endif /* __OMAP_HDMI_AUDIO_H__ */ diff --git a/sound/soc/omap/Kconfig b/sound/soc/omap/Kconfig index d44463a..a2b0801 100644 --- a/sound/soc/omap/Kconfig +++ b/sound/soc/omap/Kconfig @@ -15,6 +15,12 @@ config SND_OMAP_SOC_MCPDM config SND_OMAP_SOC_HDMI tristate
+config SND_OMAP_SOC_HDMI_AUDIO + tristate + depends on OMAP2_DSS_HDMI_COMMON && SND_OMAP_SOC + select SND_SOC_HDMI_CODEC + select SND_SIMPLE_CARD + 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..9ff7ae5 --- /dev/null +++ b/sound/soc/omap/omap-hdmi-audio.c @@ -0,0 +1,357 @@ +/* + * omap-hdmi-audio.c -- OMAP4+ DSS HDMI audio support library + * + * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com + * + * Author: Jyri Sarha jsarha@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. + * + */ + +#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> + +#include <sound/simple_card.h> + +struct hdmi_audio_data { + int (*mode_has_audio)(struct device *dev); + int (*audio_enable)(struct device *dev, bool enable); + int (*audio_start)(struct device *dev, bool enable); + int (*audio_config)(struct device *dev, + struct omap_dss_audio *dss_audio); + + 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 platform_device *codec_pdev; + struct platform_device *card_pdev; +}; + +static int hdmi_dai_startup(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct hdmi_audio_data *ad = omapdss_hdmi_get_audio_data(dai->dev); + 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; + } + + if (!ad->mode_has_audio(dai->dev)) { + dev_err(dai->dev, "audio not supported\n"); + return -ENODEV; + } + + snd_soc_dai_set_dma_data(dai, substream, &ad->dma_data); + + return 0; +} + +static int hdmi_dai_prepare(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct hdmi_audio_data *ad = omapdss_hdmi_get_audio_data(dai->dev); + + return ad->audio_enable(dai->dev, true); +} + +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 = omapdss_hdmi_get_audio_data(dai->dev); + struct snd_aes_iec958 *iec = &ad->iec; + struct snd_cea_861_aud_if *cea = &ad->cea; + + 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->audio_config(dai->dev, &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 = omapdss_hdmi_get_audio_data(dai->dev); + int err = 0; + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + err = ad->audio_start(dai->dev, true); + break; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + ad->audio_start(dai->dev, false); + 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 = omapdss_hdmi_get_audio_data(dai->dev); + + ad->audio_enable(dai->dev, false); +} + +static const struct snd_soc_dai_ops hdmi_dai_ops = { + .startup = hdmi_dai_startup, + .hw_params = hdmi_dai_hw_params, + .prepare = hdmi_dai_prepare, + .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, +}; + +int omap_hdmi_audio_register(struct omap_hdmi_audio *ha) +{ + struct hdmi_audio_data *ad; + struct snd_soc_dai_driver *dai_drv; + struct asoc_simple_card_info card_info = { + .codec_dai.name = "hdmi-hifi", + }; + char nametmp[64]; + int ret; + + ad = devm_kzalloc(ha->dev, sizeof(*ad), GFP_KERNEL); + if (!ad) + return -ENOMEM; + ad->mode_has_audio = ha->mode_has_audio; + ad->audio_enable = ha->audio_enable; + ad->audio_start = ha->audio_start; + ad->audio_config = ha->audio_config; + 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; + if (ha->hw_version == OMAP5_HDMI) + dai_drv = &omap5_hdmi_dai; + else + dai_drv = &omap4_hdmi_dai; + + ret = snd_soc_register_component(ha->dev, &omap_hdmi_component, + dai_drv, 1); + if (ret) + return ret; + + ret = omap_pcm_platform_register(ha->dev); + if (ret) + return ret; + + ad->codec_pdev = platform_device_register_data( + ha->dev, "hdmi-audio-codec", 0, NULL, 0); + + if (IS_ERR(ad->codec_pdev)) { + snd_soc_unregister_component(ha->dev); + return PTR_ERR(ad->codec_pdev); + } + + snprintf(nametmp, sizeof(nametmp), "HDMI %s", dev_name(ha->dev)); + card_info.name = devm_kstrdup(ha->dev, nametmp, GFP_KERNEL); + card_info.card = card_info.name; + card_info.cpu_dai.name = dev_name(ha->dev); + card_info.platform = dev_name(ha->dev); + card_info.codec = dev_name(&ad->codec_pdev->dev); + + ad->card_pdev = + platform_device_register_data(ha->dev, "asoc-simple-card", 0, + &card_info, sizeof(card_info)); + if (IS_ERR(ad->card_pdev)) { + snd_soc_unregister_component(ha->dev); + platform_device_unregister(ad->codec_pdev); + return PTR_ERR(ad->card_pdev); + } + + omapdss_hdmi_set_audio_data(ha->dev, ad); + + return 0; +} +EXPORT_SYMBOL_GPL(omap_hdmi_audio_register); + +void omap_hdmi_audio_unregister(struct device *dev) +{ + struct hdmi_audio_data *ad = omapdss_hdmi_get_audio_data(dev); + + if (ad) { + platform_device_unregister(ad->card_pdev); + platform_device_unregister(ad->codec_pdev); + snd_soc_unregister_component(dev); + } +} +EXPORT_SYMBOL_GPL(omap_hdmi_audio_unregister); + +MODULE_AUTHOR("Jyri Sarha jsarha@ti.com"); +MODULE_DESCRIPTION("OMAP HDMI Audio Support Library"); +MODULE_LICENSE("GPL");