diff options
| -rw-r--r-- | drivers/video/omap2/dss/hdmi.c | 217 |
1 files changed, 217 insertions, 0 deletions
diff --git a/drivers/video/omap2/dss/hdmi.c b/drivers/video/omap2/dss/hdmi.c index 0b209d38a106..b0555f4f0a78 100644 --- a/drivers/video/omap2/dss/hdmi.c +++ b/drivers/video/omap2/dss/hdmi.c @@ -30,9 +30,15 @@ #include <linux/delay.h> #include <linux/string.h> #include <video/omapdss.h> +#if defined(CONFIG_SND_OMAP_SOC_OMAP4_HDMI) || \ + defined(CONFIG_SND_OMAP_SOC_OMAP4_HDMI_MODULE) +#include <sound/soc.h> +#include <sound/pcm_params.h> +#endif #include "dss.h" #include "hdmi.h" +#include "dss_features.h" static struct { struct mutex lock; @@ -1487,12 +1493,207 @@ static int hdmi_config_audio_acr(u32 sample_freq, u32 *n, u32 *cts) return 0; } + +static int hdmi_audio_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *dai) +{ + struct hdmi_audio_format audio_format; + struct hdmi_audio_dma audio_dma; + struct hdmi_core_audio_config core_cfg; + struct hdmi_core_infoframe_audio aud_if_cfg; + int err, n, cts; + enum hdmi_core_audio_sample_freq sample_freq; + + switch (params_format(params)) { + case SNDRV_PCM_FORMAT_S16_LE: + core_cfg.i2s_cfg.word_max_length = + HDMI_AUDIO_I2S_MAX_WORD_20BITS; + core_cfg.i2s_cfg.word_length = HDMI_AUDIO_I2S_CHST_WORD_16_BITS; + core_cfg.i2s_cfg.in_length_bits = + HDMI_AUDIO_I2S_INPUT_LENGTH_16; + core_cfg.i2s_cfg.justification = HDMI_AUDIO_JUSTIFY_LEFT; + audio_format.samples_per_word = HDMI_AUDIO_ONEWORD_TWOSAMPLES; + audio_format.sample_size = HDMI_AUDIO_SAMPLE_16BITS; + audio_format.justification = HDMI_AUDIO_JUSTIFY_LEFT; + audio_dma.transfer_size = 0x10; + break; + case SNDRV_PCM_FORMAT_S24_LE: + core_cfg.i2s_cfg.word_max_length = + HDMI_AUDIO_I2S_MAX_WORD_24BITS; + core_cfg.i2s_cfg.word_length = HDMI_AUDIO_I2S_CHST_WORD_24_BITS; + core_cfg.i2s_cfg.in_length_bits = + HDMI_AUDIO_I2S_INPUT_LENGTH_24; + audio_format.samples_per_word = HDMI_AUDIO_ONEWORD_ONESAMPLE; + audio_format.sample_size = HDMI_AUDIO_SAMPLE_24BITS; + audio_format.justification = HDMI_AUDIO_JUSTIFY_RIGHT; + core_cfg.i2s_cfg.justification = HDMI_AUDIO_JUSTIFY_RIGHT; + audio_dma.transfer_size = 0x20; + break; + default: + return -EINVAL; + } + + switch (params_rate(params)) { + case 32000: + sample_freq = HDMI_AUDIO_FS_32000; + break; + case 44100: + sample_freq = HDMI_AUDIO_FS_44100; + break; + case 48000: + sample_freq = HDMI_AUDIO_FS_48000; + break; + default: + return -EINVAL; + } + + err = hdmi_config_audio_acr(params_rate(params), &n, &cts); + if (err < 0) + return err; + + /* Audio wrapper config */ + audio_format.stereo_channels = HDMI_AUDIO_STEREO_ONECHANNEL; + audio_format.active_chnnls_msk = 0x03; + audio_format.type = HDMI_AUDIO_TYPE_LPCM; + audio_format.sample_order = HDMI_AUDIO_SAMPLE_LEFT_FIRST; + /* Disable start/stop signals of IEC 60958 blocks */ + audio_format.en_sig_blk_strt_end = HDMI_AUDIO_BLOCK_SIG_STARTEND_OFF; + + audio_dma.block_size = 0xC0; + audio_dma.mode = HDMI_AUDIO_TRANSF_DMA; + audio_dma.fifo_threshold = 0x20; /* in number of samples */ + + hdmi_wp_audio_config_dma(&audio_dma); + hdmi_wp_audio_config_format(&audio_format); + + /* + * I2S config + */ + core_cfg.i2s_cfg.en_high_bitrate_aud = false; + /* Only used with high bitrate audio */ + core_cfg.i2s_cfg.cbit_order = false; + /* Serial data and word select should change on sck rising edge */ + core_cfg.i2s_cfg.sck_edge_mode = HDMI_AUDIO_I2S_SCK_EDGE_RISING; + core_cfg.i2s_cfg.vbit = HDMI_AUDIO_I2S_VBIT_FOR_PCM; + /* Set I2S word select polarity */ + core_cfg.i2s_cfg.ws_polarity = HDMI_AUDIO_I2S_WS_POLARITY_LOW_IS_LEFT; + core_cfg.i2s_cfg.direction = HDMI_AUDIO_I2S_MSB_SHIFTED_FIRST; + /* Set serial data to word select shift. See Phillips spec. */ + core_cfg.i2s_cfg.shift = HDMI_AUDIO_I2S_FIRST_BIT_SHIFT; + /* Enable one of the four available serial data channels */ + core_cfg.i2s_cfg.active_sds = HDMI_AUDIO_I2S_SD0_EN; + + /* Core audio config */ + core_cfg.freq_sample = sample_freq; + core_cfg.n = n; + core_cfg.cts = cts; + if (dss_has_feature(FEAT_HDMI_CTS_SWMODE)) { + core_cfg.aud_par_busclk = 0; + core_cfg.cts_mode = HDMI_AUDIO_CTS_MODE_SW; + core_cfg.use_mclk = false; + } else { + core_cfg.aud_par_busclk = (((128 * 31) - 1) << 8); + core_cfg.cts_mode = HDMI_AUDIO_CTS_MODE_HW; + core_cfg.use_mclk = true; + core_cfg.mclk_mode = HDMI_AUDIO_MCLK_128FS; + } + core_cfg.layout = HDMI_AUDIO_LAYOUT_2CH; + core_cfg.en_spdif = false; + /* Use sample frequency from channel status word */ + core_cfg.fs_override = true; + /* Enable ACR packets */ + core_cfg.en_acr_pkt = true; + /* Disable direct streaming digital audio */ + core_cfg.en_dsd_audio = false; + /* Use parallel audio interface */ + core_cfg.en_parallel_aud_input = true; + + hdmi_core_audio_config(&core_cfg); + + /* + * Configure packet + * info frame audio see doc CEA861-D page 74 + */ + aud_if_cfg.db1_coding_type = HDMI_INFOFRAME_AUDIO_DB1CT_FROM_STREAM; + aud_if_cfg.db1_channel_count = 2; + aud_if_cfg.db2_sample_freq = HDMI_INFOFRAME_AUDIO_DB2SF_FROM_STREAM; + aud_if_cfg.db2_sample_size = HDMI_INFOFRAME_AUDIO_DB2SS_FROM_STREAM; + aud_if_cfg.db4_channel_alloc = 0x00; + aud_if_cfg.db5_downmix_inh = false; + aud_if_cfg.db5_lsv = 0; + + hdmi_core_audio_infoframe_config(&aud_if_cfg); + return 0; +} + +static int hdmi_audio_trigger(struct snd_pcm_substream *substream, int cmd, + struct snd_soc_dai *dai) +{ + int err = 0; + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + REG_FLD_MOD(HDMI_CORE_AV_AUD_MODE, 1, 0, 0); + REG_FLD_MOD(HDMI_WP_AUDIO_CTRL, 1, 31, 31); + REG_FLD_MOD(HDMI_WP_AUDIO_CTRL, 1, 30, 30); + break; + + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + REG_FLD_MOD(HDMI_CORE_AV_AUD_MODE, 0, 0, 0); + REG_FLD_MOD(HDMI_WP_AUDIO_CTRL, 0, 30, 30); + REG_FLD_MOD(HDMI_WP_AUDIO_CTRL, 0, 31, 31); + break; + default: + err = -EINVAL; + } + return err; +} + +static int hdmi_audio_startup(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + if (!hdmi.mode) { + pr_err("Current video settings do not support audio.\n"); + return -EIO; + } + return 0; +} + +static struct snd_soc_codec_driver hdmi_audio_codec_drv = { +}; + +static struct snd_soc_dai_ops hdmi_audio_codec_ops = { + .hw_params = hdmi_audio_hw_params, + .trigger = hdmi_audio_trigger, + .startup = hdmi_audio_startup, +}; + +static struct snd_soc_dai_driver hdmi_codec_dai_drv = { + .name = "hdmi-audio-codec", + .playback = { + .channels_min = 2, + .channels_max = 2, + .rates = SNDRV_PCM_RATE_32000 | + SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000, + .formats = SNDRV_PCM_FMTBIT_S16_LE | + SNDRV_PCM_FMTBIT_S24_LE, + }, + .ops = &hdmi_audio_codec_ops, +}; #endif /* HDMI HW IP initialisation */ static int omapdss_hdmihw_probe(struct platform_device *pdev) { struct resource *hdmi_mem; +#if defined(CONFIG_SND_OMAP_SOC_OMAP4_HDMI) || \ + defined(CONFIG_SND_OMAP_SOC_OMAP4_HDMI_MODULE) + int ret; +#endif hdmi.pdata = pdev->dev.platform_data; hdmi.pdev = pdev; @@ -1514,6 +1715,17 @@ static int omapdss_hdmihw_probe(struct platform_device *pdev) hdmi_panel_init(); +#if defined(CONFIG_SND_OMAP_SOC_OMAP4_HDMI) || \ + defined(CONFIG_SND_OMAP_SOC_OMAP4_HDMI_MODULE) + + /* Register ASoC codec DAI */ + ret = snd_soc_register_codec(&pdev->dev, &hdmi_audio_codec_drv, + &hdmi_codec_dai_drv, 1); + if (ret) { + DSSERR("can't register ASoC HDMI audio codec\n"); + return ret; + } +#endif return 0; } @@ -1521,6 +1733,11 @@ static int omapdss_hdmihw_remove(struct platform_device *pdev) { hdmi_panel_exit(); +#if defined(CONFIG_SND_OMAP_SOC_OMAP4_HDMI) || \ + defined(CONFIG_SND_OMAP_SOC_OMAP4_HDMI_MODULE) + snd_soc_unregister_codec(&pdev->dev); +#endif + iounmap(hdmi.base_wp); return 0; |