Add ALSA based HDMI I2S audio driver for dw_hdmi. Sound card driver could connect to this codec through the codec dai name "dw-hdmi-i2s-audio".

Signed-off-by: Yakir Yang ykk@rock-chips.com --- drivers/gpu/drm/bridge/Kconfig | 9 + drivers/gpu/drm/bridge/Makefile | 1 + drivers/gpu/drm/bridge/dw_hdmi-i2s-audio.c | 412 +++++++++++++++++++++++++++++ drivers/gpu/drm/bridge/dw_hdmi.c | 24 +- drivers/gpu/drm/bridge/dw_hdmi.h | 3 + 5 files changed, 440 insertions(+), 9 deletions(-) create mode 100644 drivers/gpu/drm/bridge/dw_hdmi-i2s-audio.c

diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig index 9fff41e..fa8a9d2 100644 --- a/drivers/gpu/drm/bridge/Kconfig +++ b/drivers/gpu/drm/bridge/Kconfig @@ -14,6 +14,15 @@ config DRM_DW_HDMI_AHB_AUDIO Designware HDMI block. This is used in conjunction with the i.MX6 HDMI driver.

+config DRM_DW_HDMI_I2S_AUDIO + tristate "Synopsis Designware I2S Audio interface" + depends on DRM_DW_HDMI && SND + select SND_PCM + help + Support the I2S Audio interface which is part of the Synopsis + Designware HDMI block. This is used in conjunction with the + RK3288 HDMI driver. + config DRM_PTN3460 tristate "PTN3460 DP/LVDS bridge" depends on DRM diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile index ebc5190..4aa566a 100644 --- a/drivers/gpu/drm/bridge/Makefile +++ b/drivers/gpu/drm/bridge/Makefile @@ -3,3 +3,4 @@ ccflags-y := -Iinclude/drm obj-$(CONFIG_DRM_PTN3460) += ptn3460.o obj-$(CONFIG_DRM_DW_HDMI) += dw_hdmi.o obj-$(CONFIG_DRM_DW_HDMI_AHB_AUDIO) += dw_hdmi-ahb-audio.o +obj-$(CONFIG_DRM_DW_HDMI_I2S_AUDIO) += dw_hdmi-i2s-audio.o diff --git a/drivers/gpu/drm/bridge/dw_hdmi-i2s-audio.c b/drivers/gpu/drm/bridge/dw_hdmi-i2s-audio.c new file mode 100644 index 0000000..e0b5b9d --- /dev/null +++ b/drivers/gpu/drm/bridge/dw_hdmi-i2s-audio.c @@ -0,0 +1,412 @@ +/* + * DesignWare HDMI audio driver + * + * 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. + * + * Written and tested against the Designware HDMI Tx found in RK3288. + */ +#include <linux/io.h> +#include <linux/init.h> +#include <linux/kernel.h> +#include <linux/module.h> +#include <linux/device.h> +#include <linux/moduleparam.h> + +#include <sound/pcm.h> +#include <sound/soc.h> +#include <sound/core.h> +#include <sound/jack.h> +#include <sound/initval.h> +#include <sound/pcm_params.h> +#include <drm/bridge/dw_hdmi.h> + +#include "dw_hdmi-audio.h" + +#define DRIVER_NAME "dw-hdmi-i2s-audio" + +enum { + AUDIO_CONF1_DATWIDTH_MSK = 0x1F, + AUDIO_CONF1_DATAMODE_MSK = 0xE0, + AUDIO_DAIFMT_IIS = 0x0, + AUDIO_DAIFMT_RIGHT_J = 0x20, + AUDIO_DAIFMT_LEFT_J = 0x40, + AUDIO_DAIFMT_BURST_1 = 0x60, + AUDIO_DAIFMT_BURST_2 = 0x80, + AUDIO_CONF0_INTERFACE_MSK = BIT(5), + AUDIO_INPUTTYPE_IIS = 0x20, + AUDIO_INPUTTYPE_SPDIF = 0x00, + AUDIO_CONF0_I2SINEN_MSK = 0x0F, + AUDIO_CHANNELNUM_2 = 0x01, + AUDIO_CHANNELNUM_4 = 0x03, + AUDIO_CHANNELNUM_6 = 0x07, + AUDIO_CHANNELNUM_8 = 0x0F, + HDMI_PHY_HPD = BIT(1), + HDMI_PHY_STAT0 = 0x3004, + HDMI_AUD_CONF0 = 0x3100, + HDMI_AUD_CONF1 = 0x3101, + HDMI_AUD_INPUTCLKFS = 0x3206, +}; + +struct dw_audio_fmt { + int input_type; + int chan_num; + int sample_rate; + int word_length; + int dai_fmt; +}; + +struct snd_dw_hdmi { + struct device *dev; + struct dw_hdmi_audio_data data; + + u8 jack_status; + bool is_jack_ready; + struct snd_soc_jack jack; + + bool is_playback_status; + struct dw_audio_fmt fmt; +}; + +static void hdmi_writel(struct snd_dw_hdmi *dw, u8 val, int offset) +{ + writel(val, dw->data.base + (offset << 2)); +} + +static u8 hdmi_readl(struct snd_dw_hdmi *dw, int offset) +{ + return readl(dw->data.base + (offset << 2)); +} + +static void hdmi_modl(struct snd_dw_hdmi *dw, u8 data, + u8 mask, unsigned reg) +{ + u8 val = hdmi_readl(dw, reg) & ~mask; + + val |= data & mask; + hdmi_writel(dw, val, reg); +} + +int snd_dw_hdmi_jack_detect(struct snd_dw_hdmi *dw) +{ + u8 jack_status; + + if (!dw->is_jack_ready) + return -EINVAL; + + jack_status = !!(hdmi_readl(dw, HDMI_PHY_STAT0) & HDMI_PHY_HPD) ? + SND_JACK_LINEOUT : 0; + + if (jack_status != dw->jack_status) { + snd_soc_jack_report(&dw->jack, jack_status, SND_JACK_LINEOUT); + dw->jack_status = jack_status; + } + + return 0; +} + +static irqreturn_t snd_dw_hdmi_irq(int irq, void *dev_id) +{ + struct snd_dw_hdmi *dw = dev_id; + + snd_dw_hdmi_jack_detect(dw); + + return IRQ_HANDLED; +} + +static void dw_hdmi_audio_set_fmt(struct snd_dw_hdmi *dw, + const struct dw_audio_fmt *fmt) +{ + hdmi_modl(dw, fmt->input_type, AUDIO_CONF0_INTERFACE_MSK, + HDMI_AUD_CONF0); + + hdmi_modl(dw, fmt->chan_num, AUDIO_CONF0_I2SINEN_MSK, + HDMI_AUD_CONF0); + + hdmi_modl(dw, fmt->word_length, AUDIO_CONF1_DATWIDTH_MSK, + HDMI_AUD_CONF1); + + hdmi_modl(dw, fmt->dai_fmt, AUDIO_CONF1_DATAMODE_MSK, + HDMI_AUD_CONF1); + + hdmi_writel(dw, 0, HDMI_AUD_INPUTCLKFS); + + dw_hdmi_set_sample_rate(dw->data.hdmi, fmt->sample_rate); +} + +static void dw_audio_set_fmt(struct snd_dw_hdmi *dw, + const struct dw_audio_fmt *fmt) +{ + if (fmt) + dw->fmt = *fmt; + dw_hdmi_audio_set_fmt(dw, &dw->fmt); +} + +static int snd_dw_hdmi_dai_startup(struct snd_pcm_substream *substream, + struct snd_soc_dai *codec_dai) +{ + struct snd_dw_hdmi *dw = snd_soc_dai_get_drvdata(codec_dai); + + dw->is_playback_status = true; + dw_hdmi_audio_enable(dw->data.hdmi); + + return 0; +} + +static int snd_dw_hdmi_dai_hw_params(struct snd_pcm_substream *substream, + struct snd_pcm_hw_params *params, + struct snd_soc_dai *codec_dai) +{ + struct snd_dw_hdmi *dw = snd_soc_dai_get_drvdata(codec_dai); + struct snd_soc_pcm_runtime *rtd = substream->private_data; + struct dw_audio_fmt dw_fmt; + unsigned int fmt, rate, chan, width; + + fmt = rtd->dai_link->dai_fmt & SND_SOC_DAIFMT_FORMAT_MASK; + switch (fmt) { + case SND_SOC_DAIFMT_I2S: + dw_fmt.dai_fmt = AUDIO_DAIFMT_IIS; + break; + case SND_SOC_DAIFMT_LEFT_J: + dw_fmt.dai_fmt = AUDIO_DAIFMT_LEFT_J; + break; + case SND_SOC_DAIFMT_RIGHT_J: + dw_fmt.dai_fmt = AUDIO_DAIFMT_RIGHT_J; + break; + default: + dev_err(codec_dai->dev, "DAI format unsupported"); + return -EINVAL; + } + + width = params_width(params); + switch (width) { + case 16: + case 24: + dw_fmt.word_length = width; + break; + default: + dev_err(codec_dai->dev, "width[%d] not support!\n", width); + return -EINVAL; + } + + chan = params_channels(params); + switch (chan) { + case 2: + dw_fmt.chan_num = AUDIO_CHANNELNUM_2; + break; + case 4: + dw_fmt.chan_num = AUDIO_CHANNELNUM_4; + break; + case 6: + dw_fmt.chan_num = AUDIO_CHANNELNUM_6; + break; + case 8: + dw_fmt.chan_num = AUDIO_CHANNELNUM_8; + break; + default: + dev_err(codec_dai->dev, "channel[%d] not support!\n", chan); + return -EINVAL; + } + + rate = params_rate(params); + switch (rate) { + case 32000: + case 44100: + case 48000: + case 88200: + case 96000: + case 176400: + case 192000: + dw_fmt.sample_rate = rate; + break; + default: + dev_err(codec_dai->dev, "rate[%d] not support!\n", rate); + return -EINVAL; + } + + dw_fmt.input_type = AUDIO_INPUTTYPE_IIS; + + dw_audio_set_fmt(dw, &dw_fmt); + + return 0; +} + +static int snd_dw_hdmi_dai_trigger(struct snd_pcm_substream *substream, + int cmd, struct snd_soc_dai *codec_dai) +{ + struct snd_dw_hdmi *dw = snd_soc_dai_get_drvdata(codec_dai); + + switch (cmd) { + case SNDRV_PCM_TRIGGER_START: + case SNDRV_PCM_TRIGGER_RESUME: + case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: + dw_hdmi_audio_enable(dw->data.hdmi); + break; + case SNDRV_PCM_TRIGGER_STOP: + case SNDRV_PCM_TRIGGER_SUSPEND: + case SNDRV_PCM_TRIGGER_PAUSE_PUSH: + dw_hdmi_audio_disable(dw->data.hdmi); + break; + default: + return -EINVAL; + } + + return 0; +} + +static void snd_dw_hdmi_dai_shutdown(struct snd_pcm_substream *substream, + struct snd_soc_dai *codec_dai) +{ + struct snd_dw_hdmi *dw = snd_soc_dai_get_drvdata(codec_dai); + + dw->is_playback_status = false; + dw_hdmi_audio_disable(dw->data.hdmi); +} + +static int snd_dw_hdmi_audio_probe(struct snd_soc_codec *codec) +{ + struct snd_dw_hdmi *dw = snd_soc_codec_get_drvdata(codec); + int ret; + + ret = snd_soc_jack_new(codec, "dw Jack", SND_JACK_LINEOUT, + &dw->jack); + if (ret) { + dev_err(dw->dev, "jack new failed (%d)\n", ret); + dw->is_jack_ready = false; + return ret; + } + + dw->is_jack_ready = true; + + return snd_dw_hdmi_jack_detect(dw); +} + +static const struct snd_soc_dapm_widget snd_dw_hdmi_audio_widgets[] = { + SND_SOC_DAPM_OUTPUT("TX"), +}; + +static const struct snd_soc_dapm_route snd_dw_hdmi_audio_routes[] = { + { "TX", NULL, "Playback" }, +}; + +static const struct snd_soc_dai_ops dw_hdmi_dai_ops = { + .startup = snd_dw_hdmi_dai_startup, + .hw_params = snd_dw_hdmi_dai_hw_params, + .trigger = snd_dw_hdmi_dai_trigger, + .shutdown = snd_dw_hdmi_dai_shutdown, +}; + +static struct snd_soc_dai_driver dw_hdmi_audio_dai = { + .name = "dw-hdmi-hifi", + .playback = { + .stream_name = "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 = &dw_hdmi_dai_ops, +}; + +static const struct snd_soc_codec_driver dw_hdmi_audio = { + .probe = snd_dw_hdmi_audio_probe, + .dapm_widgets = snd_dw_hdmi_audio_widgets, + .num_dapm_widgets = ARRAY_SIZE(snd_dw_hdmi_audio_widgets), + .dapm_routes = snd_dw_hdmi_audio_routes, + .num_dapm_routes = ARRAY_SIZE(snd_dw_hdmi_audio_routes), +}; + +static int dw_hdmi_audio_probe(struct platform_device *pdev) +{ + struct dw_hdmi_audio_data *data = pdev->dev.platform_data; + struct snd_dw_hdmi *dw; + int ret; + + dw = devm_kzalloc(&pdev->dev, sizeof(*dw), GFP_KERNEL); + if (!dw) + return -ENOMEM; + + dw->data = *data; + dw->dev = &pdev->dev; + dw->is_jack_ready = false; + platform_set_drvdata(pdev, dw); + + ret = request_irq(dw->data.irq, snd_dw_hdmi_irq, IRQF_SHARED, + "dw-dw-audio", dw); + if (ret) { + dev_err(&pdev->dev, "request irq failed (%d)\n", ret); + goto free_dw_data; + } + + ret = snd_soc_register_codec(&pdev->dev, &dw_hdmi_audio, + &dw_hdmi_audio_dai, 1); + if (ret) { + dev_err(&pdev->dev, "register codec failed (%d)\n", ret); + goto free_irq; + } + + dev_dbg(&pdev->dev, "dw audio init success.\n"); + + return 0; + +free_irq: + free_irq(dw->data.irq, dw); +free_dw_data: + devm_kfree(&pdev->dev, dw); + + return ret; +} + +static int dw_hdmi_audio_remove(struct platform_device *pdev) +{ + struct snd_dw_hdmi *dw = platform_get_drvdata(pdev); + + snd_soc_unregister_codec(&pdev->dev); + devm_free_irq(&pdev->dev, dw->data.irq, dw); + devm_kfree(&pdev->dev, dw); + + return 0; +} + +#ifdef CONFIG_PM +static int dw_hdmi_audio_resume(struct device *dev) +{ + struct snd_dw_hdmi *dw = dev_get_drvdata(dev); + + snd_dw_hdmi_jack_detect(dw); + + if (dw->is_playback_status) + dw_hdmi_audio_set_fmt(dw, &dw->fmt); + + return 0; +} + +static int dw_hdmi_audio_suspend(struct device *dev) +{ + return 0; +} +#endif + +static const struct dev_pm_ops dw_hdmi_audio_pm = { + SET_SYSTEM_SLEEP_PM_OPS(dw_hdmi_audio_suspend, dw_hdmi_audio_resume) +}; + +static struct platform_driver dw_hdmi_audio_driver = { + .driver = { + .name = DRIVER_NAME, + .owner = THIS_MODULE, + .pm = &dw_hdmi_audio_pm, + }, + .probe = dw_hdmi_audio_probe, + .remove = dw_hdmi_audio_remove, +}; +module_platform_driver(dw_hdmi_audio_driver); + +MODULE_AUTHOR("Yakir Yang ykk@rock-chips.com"); +MODULE_DESCRIPTION("DW dw Audio ASoC Interface"); +MODULE_LICENSE("GPL"); +MODULE_ALIAS(PLATFORM_MODULE_PREFIX DRIVER_NAME); diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c index 7b70619..5f092de 100644 --- a/drivers/gpu/drm/bridge/dw_hdmi.c +++ b/drivers/gpu/drm/bridge/dw_hdmi.c @@ -1720,20 +1720,26 @@ int dw_hdmi_bind(struct device *dev, struct device *master,

memset(&pdevinfo, 0, sizeof(pdevinfo)); pdevinfo.parent = dev; - pdevinfo.id = PLATFORM_DEVID_AUTO;

- if (hdmi_readb(hdmi, HDMI_CONFIG1_ID) & HDMI_CONFIG1_AHB) { - audio.phys = iores->start; - audio.base = hdmi->regs; - audio.irq = irq; - audio.hdmi = hdmi; - audio.eld = hdmi->connector.eld; + audio.phys = iores->start; + audio.base = hdmi->regs; + audio.irq = irq; + audio.hdmi = hdmi; + audio.eld = hdmi->connector.eld; + + pdevinfo.data = &audio; + pdevinfo.size_data = sizeof(audio);

+ if (hdmi_readb(hdmi, HDMI_CONFIG1_ID) & HDMI_CONFIG1_AHB) { pdevinfo.name = "dw-hdmi-ahb-audio"; - pdevinfo.data = &audio; - pdevinfo.size_data = sizeof(audio); + pdevinfo.id = PLATFORM_DEVID_AUTO; pdevinfo.dma_mask = DMA_BIT_MASK(32); hdmi->audio = platform_device_register_full(&pdevinfo); + + } else if (hdmi_readb(hdmi, HDMI_CONFIG0_ID) & HDMI_CONFIG0_I2S) { + pdevinfo.name = "dw-hdmi-ahb-audio"; + pdevinfo.id = PLATFORM_DEVID_NONE; + hdmi->audio = platform_device_register_full(&pdevinfo); }

dev_set_drvdata(dev, hdmi); diff --git a/drivers/gpu/drm/bridge/dw_hdmi.h b/drivers/gpu/drm/bridge/dw_hdmi.h index 78e54e8..9c22377 100644 --- a/drivers/gpu/drm/bridge/dw_hdmi.h +++ b/drivers/gpu/drm/bridge/dw_hdmi.h @@ -545,6 +545,9 @@ #define HDMI_I2CM_FS_SCL_LCNT_0_ADDR 0x7E12

enum { +/* CONFIG0_ID field values */ + HDMI_CONFIG0_I2S = 0x01, + /* CONFIG1_ID field values */ HDMI_CONFIG1_AHB = 0x01,