Integrate ASoC DAI component driver in to the OMAP hdmi driver. The patch also updates the relevant entry in ti,omap5-dss DT binding document. The driver registers a dummy hdmi codec driver and a simple-card driver to produce a fully functional ALSA device. The DAI driver is implemented in hdmi_audio.c, but it still needs to be registered from hdmi4.c or hdmi5.c.
Signed-off-by: Jyri Sarha jsarha@ti.com --- drivers/video/fbdev/omap2/dss/Kconfig | 3 + drivers/video/fbdev/omap2/dss/Makefile | 1 + drivers/video/fbdev/omap2/dss/hdmi.h | 37 +++- drivers/video/fbdev/omap2/dss/hdmi_audio.c | 298 ++++++++++++++++++++++++++++ 4 files changed, 335 insertions(+), 4 deletions(-) create mode 100644 drivers/video/fbdev/omap2/dss/hdmi_audio.c
diff --git a/drivers/video/fbdev/omap2/dss/Kconfig b/drivers/video/fbdev/omap2/dss/Kconfig index 3d5eb6c..41fb8ac 100644 --- a/drivers/video/fbdev/omap2/dss/Kconfig +++ b/drivers/video/fbdev/omap2/dss/Kconfig @@ -67,6 +67,9 @@ config OMAP2_DSS_VENC config OMAP2_DSS_HDMI_COMMON bool
+config OMAP_DSS_HDMI_AUDIO + bool + config OMAP4_DSS_HDMI bool "HDMI support for OMAP4" default y diff --git a/drivers/video/fbdev/omap2/dss/Makefile b/drivers/video/fbdev/omap2/dss/Makefile index 245f933..a95d715 100644 --- a/drivers/video/fbdev/omap2/dss/Makefile +++ b/drivers/video/fbdev/omap2/dss/Makefile @@ -13,6 +13,7 @@ omapdss-$(CONFIG_OMAP2_DSS_SDI) += sdi.o omapdss-$(CONFIG_OMAP2_DSS_DSI) += dsi.o omapdss-$(CONFIG_OMAP2_DSS_HDMI_COMMON) += hdmi_common.o hdmi_wp.o hdmi_pll.o \ hdmi_phy.o +omapdss-$(CONFIG_OMAP_DSS_HDMI_AUDIO) += hdmi_audio.o omapdss-$(CONFIG_OMAP4_DSS_HDMI) += hdmi4.o hdmi4_core.o omapdss-$(CONFIG_OMAP5_DSS_HDMI) += hdmi5.o hdmi5_core.o ccflags-$(CONFIG_OMAP2_DSS_DEBUG) += -DDEBUG diff --git a/drivers/video/fbdev/omap2/dss/hdmi.h b/drivers/video/fbdev/omap2/dss/hdmi.h index f5ae8ae..64544e1 100644 --- a/drivers/video/fbdev/omap2/dss/hdmi.h +++ b/drivers/video/fbdev/omap2/dss/hdmi.h @@ -25,6 +25,9 @@ #include <linux/hdmi.h> #include <video/omapdss.h>
+#include <sound/dmaengine_pcm.h> +#include <uapi/sound/asound.h> + #include "dss.h"
/* HDMI Wrapper */ @@ -337,7 +340,31 @@ int hdmi_phy_parse_lanes(struct hdmi_phy_data *phy, const u32 *lanes); int hdmi_parse_lanes_of(struct platform_device *pdev, struct device_node *ep, struct hdmi_phy_data *phy);
-#if defined(CONFIG_OMAP4_DSS_HDMI_AUDIO) || defined(CONFIG_OMAP5_DSS_HDMI_AUDIO) +struct omap_hdmi; + +/* HDMI audio support */ +struct hdmi_audio_data { + /* These should be initialized when hdmi_audio_register() is called */ + struct snd_soc_dai_driver *hdmi_dai_drv; + + int (*mode_has_audio)(struct omap_hdmi *hd); + int (*audio_enable)(struct omap_hdmi *hd, bool enable); + int (*audio_start)(struct omap_hdmi *hd, bool enable); + int (*audio_config)(struct omap_hdmi *hd, + struct omap_dss_audio *dss_audio); + + /* These are for audio implementation's private use */ + 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; +}; + +int hdmi_audio_register(struct platform_device *pdev); +void hdmi_audio_unregister(struct platform_device *pdev); + int hdmi_compute_acr(u32 pclk, u32 sample_freq, u32 *n, u32 *cts); int hdmi_wp_audio_enable(struct hdmi_wp_data *wp, bool enable); int hdmi_wp_audio_core_req_enable(struct hdmi_wp_data *wp, bool enable); @@ -345,13 +372,16 @@ void hdmi_wp_audio_config_format(struct hdmi_wp_data *wp, struct hdmi_audio_format *aud_fmt); void hdmi_wp_audio_config_dma(struct hdmi_wp_data *wp, struct hdmi_audio_dma *aud_dma); -static inline bool hdmi_mode_has_audio(int mode) +static inline bool hdmi_mode_has_audio(struct hdmi_config *cfg) { - return mode == HDMI_HDMI ? true : false; + return cfg->hdmi_dvi_mode == HDMI_HDMI ? true : false; }
/* HDMI DRV data */ struct omap_hdmi { +#if defined(CONFIG_OMAP_DSS_HDMI_AUDIO) + struct hdmi_audio_data audio; +#endif struct mutex lock; struct platform_device *pdev;
@@ -371,4 +401,3 @@ struct omap_hdmi { };
#endif -#endif diff --git a/drivers/video/fbdev/omap2/dss/hdmi_audio.c b/drivers/video/fbdev/omap2/dss/hdmi_audio.c new file mode 100644 index 0000000..6795d93 --- /dev/null +++ b/drivers/video/fbdev/omap2/dss/hdmi_audio.c @@ -0,0 +1,298 @@ +/* + * OMAP4+ HDMI audio + * + * Copyright (C) 2014 Texas Instruments Incorporated + * + * Authors: 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/simple_card.h> + +#include "hdmi.h" + +static int hdmi_dai_startup(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct omap_hdmi *hd = snd_soc_dai_get_drvdata(dai); + struct hdmi_audio_data *ad = &hd->audio; + 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(hd)) { + 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 omap_hdmi *hd = snd_soc_dai_get_drvdata(dai); + struct hdmi_audio_data *ad = &hd->audio; + + return ad->audio_enable(hd, true); +} + +static int hdmi_dai_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *dai) +{ + struct omap_hdmi *hd = snd_soc_dai_get_drvdata(dai); + struct hdmi_audio_data *ad = &hd->audio; + 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(hd, &ad->dss_audio); +} + +static int hdmi_dai_trigger(struct snd_pcm_substream *substream, int cmd, + struct snd_soc_dai *dai) +{ + struct omap_hdmi *hd = snd_soc_dai_get_drvdata(dai); + struct hdmi_audio_data *ad = &hd->audio; + 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(hd, true); + break; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + ad->audio_start(hd, false); + break; + default: + err = -EINVAL; + } + return err; +} + +static void hdmi_dai_shutdown(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + struct omap_hdmi *hd = snd_soc_dai_get_drvdata(dai); + struct hdmi_audio_data *ad = &hd->audio; + + ad->audio_enable(hd, 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", +}; + +int hdmi_audio_register(struct platform_device *pdev) +{ + struct omap_hdmi *hd = dev_get_drvdata(&pdev->dev); + struct hdmi_audio_data *ad = &hd->audio; + struct device *dev = &pdev->dev; + struct asoc_simple_card_info card_info = { + .codec_dai.name = "hdmi-hifi", + }; + char nametmp[64]; + int ret; + + ad->dma_data.addr = hdmi_wp_get_audio_dma_addr(&hd->wp); + ad->dma_data.filter_data = "audio_tx"; + ad->dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; + ad->hdmi_dai_drv->ops = &hdmi_dai_ops, + + ret = snd_soc_register_component(dev, &omap_hdmi_component, + ad->hdmi_dai_drv, 1); + if (ret) + return ret; + + ret = omap_pcm_platform_register(dev); + if (ret) + return ret; + + ad->codec_pdev = platform_device_register_data(dev, "hdmi-audio-codec", + 0, NULL, 0); + if (IS_ERR(ad->codec_pdev)) { + snd_soc_unregister_component(dev); + return PTR_ERR(ad->codec_pdev); + } + + snprintf(nametmp, sizeof(nametmp), "HDMI %s", dev_name(dev)); + card_info.name = devm_kstrdup(dev, nametmp, GFP_KERNEL); + card_info.card = card_info.name; + card_info.cpu_dai.name = dev_name(dev); + card_info.platform = dev_name(dev); + card_info.codec = dev_name(&ad->codec_pdev->dev); + + ad->card_pdev = + platform_device_register_data(dev, "asoc-simple-card", 0, + &card_info, sizeof(card_info)); + if (IS_ERR(ad->card_pdev)) { + snd_soc_unregister_component(dev); + platform_device_unregister(ad->codec_pdev); + return PTR_ERR(ad->card_pdev); + } + return 0; +} + +void hdmi_audio_unregister(struct platform_device *pdev) +{ + struct omap_hdmi *hd = dev_get_drvdata(&pdev->dev); + struct hdmi_audio_data *ad = &hd->audio; + + platform_device_unregister(ad->card_pdev); + platform_device_unregister(ad->codec_pdev); + snd_soc_unregister_component(&pdev->dev); +}