[PATCH v2 2/2] drm: sun4i: hdmi: Add support for sun4i HDMI encoder audio
From: Stefan Mavrodiev
Date: Mon Jan 20 2020 - 07:34:00 EST
Add HDMI audio support for the sun4i-hdmi encoder, used on
the older Allwinner chips - A10, A20, A31.
Most of the code is based on the BSP implementation. In it
dditional formats are supported (S20_3LE and S24_LE), however
there where some problems with them and only S16_LE is left.
Signed-off-by: Stefan Mavrodiev <stefan@xxxxxxxxxx>
---
Changes for v2:
- Create a new platform driver instead of using the HDMI encoder
- Expose a new kcontrol to the userspace holding the ELD data
- Wrap all macro arguments in parentheses
drivers/gpu/drm/sun4i/Kconfig | 1 +
drivers/gpu/drm/sun4i/Makefile | 1 +
drivers/gpu/drm/sun4i/sun4i_hdmi.h | 28 ++
drivers/gpu/drm/sun4i/sun4i_hdmi_audio.c | 452 +++++++++++++++++++++++
drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c | 20 +
5 files changed, 502 insertions(+)
create mode 100644 drivers/gpu/drm/sun4i/sun4i_hdmi_audio.c
diff --git a/drivers/gpu/drm/sun4i/Kconfig b/drivers/gpu/drm/sun4i/Kconfig
index 37e90e42943f..192b732b10cd 100644
--- a/drivers/gpu/drm/sun4i/Kconfig
+++ b/drivers/gpu/drm/sun4i/Kconfig
@@ -19,6 +19,7 @@ if DRM_SUN4I
config DRM_SUN4I_HDMI
tristate "Allwinner A10 HDMI Controller Support"
default DRM_SUN4I
+ select SND_PCM_ELD
help
Choose this option if you have an Allwinner SoC with an HDMI
controller.
diff --git a/drivers/gpu/drm/sun4i/Makefile b/drivers/gpu/drm/sun4i/Makefile
index 0d04f2447b01..e2d82b451c36 100644
--- a/drivers/gpu/drm/sun4i/Makefile
+++ b/drivers/gpu/drm/sun4i/Makefile
@@ -5,6 +5,7 @@ sun4i-frontend-y += sun4i_frontend.o
sun4i-drm-y += sun4i_drv.o
sun4i-drm-y += sun4i_framebuffer.o
+sun4i-drm-hdmi-y += sun4i_hdmi_audio.o
sun4i-drm-hdmi-y += sun4i_hdmi_ddc_clk.o
sun4i-drm-hdmi-y += sun4i_hdmi_enc.o
sun4i-drm-hdmi-y += sun4i_hdmi_i2c.o
diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi.h b/drivers/gpu/drm/sun4i/sun4i_hdmi.h
index 7ad3f06c127e..a965a97b4814 100644
--- a/drivers/gpu/drm/sun4i/sun4i_hdmi.h
+++ b/drivers/gpu/drm/sun4i/sun4i_hdmi.h
@@ -42,7 +42,32 @@
#define SUN4I_HDMI_VID_TIMING_POL_VSYNC BIT(1)
#define SUN4I_HDMI_VID_TIMING_POL_HSYNC BIT(0)
+#define SUN4I_HDMI_AUDIO_CTRL_REG 0x040
+#define SUN4I_HDMI_AUDIO_CTRL_ENABLE BIT(31)
+#define SUN4I_HDMI_AUDIO_CTRL_RESET BIT(30)
+
+#define SUN4I_HDMI_AUDIO_FMT_REG 0x048
+#define SUN4I_HDMI_AUDIO_FMT_SRC BIT(31)
+#define SUN4I_HDMI_AUDIO_FMT_LAYOUT BIT(3)
+#define SUN4I_HDMI_AUDIO_FMT_CH_CFG(n) ((n) - 1)
+#define SUN4I_HDMI_AUDIO_FMT_CH_CFG_MASK GENMASK(2, 0)
+
+#define SUN4I_HDMI_AUDIO_PCM_REG 0x4c
+#define SUN4I_HDMI_AUDIO_PCM_CH_MAP(n, m) (((m) - 1) << ((n) * 4))
+#define SUN4I_HDMI_AUDIO_PCM_CH_MAP_MASK(n) (GENMASK(2, 0) << ((n) * 4))
+
+#define SUN4I_HDMI_AUDIO_CTS_REG 0x050
+#define SUN4I_HDMI_AUDIO_CTS(n) ((n) & GENMASK(19, 0))
+
+#define SUN4I_HDMI_AUDIO_N_REG 0x054
+#define SUN4I_HDMI_AUDIO_N(n) ((n) & GENMASK(19, 0))
+
+#define SUN4I_HDMI_AUDIO_STAT0_REG 0x58
+#define SUN4I_HDMI_AUDIO_STAT0_FREQ(n) ((n) << 24)
+#define SUN4I_HDMI_AUDIO_STAT0_FREQ_MASK GENMASK(27, 24)
+
#define SUN4I_HDMI_AVI_INFOFRAME_REG(n) (0x080 + (n))
+#define SUN4I_HDMI_AUDIO_INFOFRAME_REG(n) (0x0a0 + (n))
#define SUN4I_HDMI_PAD_CTRL0_REG 0x200
#define SUN4I_HDMI_PAD_CTRL0_BIASEN BIT(31)
@@ -286,9 +311,12 @@ struct sun4i_hdmi {
struct sun4i_drv *drv;
bool hdmi_monitor;
+ bool hdmi_audio;
+
struct cec_adapter *cec_adap;
const struct sun4i_hdmi_variant *variant;
+ struct platform_device *audio;
};
int sun4i_ddc_create(struct sun4i_hdmi *hdmi, struct clk *clk);
diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi_audio.c b/drivers/gpu/drm/sun4i/sun4i_hdmi_audio.c
new file mode 100644
index 000000000000..fbfe59459633
--- /dev/null
+++ b/drivers/gpu/drm/sun4i/sun4i_hdmi_audio.c
@@ -0,0 +1,452 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2020 Olimex Ltd.
+ * Author: Stefan Mavrodiev <stefan@xxxxxxxxxx>
+ */
+#include <linux/dma-mapping.h>
+#include <linux/dmaengine.h>
+#include <linux/module.h>
+#include <linux/of_dma.h>
+#include <linux/regmap.h>
+
+#include <drm/drm_print.h>
+
+#include <sound/dmaengine_pcm.h>
+#include <sound/pcm_drm_eld.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#include "sun4i_hdmi.h"
+
+#define DRIVER_NAME "sun4i-hdmi-audio"
+
+struct sun4i_hdmi_audio {
+ struct device *hdmi;
+ u8 audio_channels;
+};
+
+static int sun4i_hdmi_audio_ctl_eld_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
+ uinfo->count = MAX_ELD_BYTES;
+ return 0;
+}
+
+static int sun4i_hdmi_audio_ctl_eld_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
+ struct snd_soc_card *card = snd_soc_component_get_drvdata(component);
+ struct sun4i_hdmi_audio *priv = snd_soc_card_get_drvdata(card);
+ struct sun4i_hdmi *hdmi = dev_get_drvdata(priv->hdmi);
+
+ memcpy(ucontrol->value.bytes.data,
+ hdmi->connector.eld,
+ MAX_ELD_BYTES);
+
+ return 0;
+}
+
+static const struct snd_kcontrol_new sun4i_hdmi_audio_controls[] = {
+ {
+ .access = SNDRV_CTL_ELEM_ACCESS_READ |
+ SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+ .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+ .name = "ELD",
+ .info = sun4i_hdmi_audio_ctl_eld_info,
+ .get = sun4i_hdmi_audio_ctl_eld_get,
+ },
+};
+
+static const struct snd_soc_dapm_widget sun4i_hdmi_audio_widgets[] = {
+ SND_SOC_DAPM_OUTPUT("TX"),
+};
+
+static const struct snd_soc_dapm_route sun4i_hdmi_audio_routes[] = {
+ { "TX", NULL, "Playback" },
+};
+
+static const struct snd_soc_component_driver sun4i_hdmi_audio_component = {
+ .controls = sun4i_hdmi_audio_controls,
+ .num_controls = ARRAY_SIZE(sun4i_hdmi_audio_controls),
+ .dapm_widgets = sun4i_hdmi_audio_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(sun4i_hdmi_audio_widgets),
+ .dapm_routes = sun4i_hdmi_audio_routes,
+ .num_dapm_routes = ARRAY_SIZE(sun4i_hdmi_audio_routes),
+};
+
+static int sun4i_hdmi_audio_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_card *card = snd_soc_dai_get_drvdata(dai);
+ struct sun4i_hdmi_audio *priv = snd_soc_card_get_drvdata(card);
+ struct sun4i_hdmi *hdmi = dev_get_drvdata(priv->hdmi);
+ u32 reg;
+ int ret;
+
+ regmap_write(hdmi->regmap, SUN4I_HDMI_AUDIO_CTRL_REG, 0);
+ regmap_write(hdmi->regmap,
+ SUN4I_HDMI_AUDIO_CTRL_REG,
+ SUN4I_HDMI_AUDIO_CTRL_RESET);
+ ret = regmap_read_poll_timeout(hdmi->regmap,
+ SUN4I_HDMI_AUDIO_CTRL_REG,
+ reg, !reg, 100, 50000);
+ if (ret < 0) {
+ DRM_ERROR("Failed to reset HDMI Audio\n");
+ return ret;
+ }
+
+ regmap_write(hdmi->regmap,
+ SUN4I_HDMI_AUDIO_CTRL_REG,
+ SUN4I_HDMI_AUDIO_CTRL_ENABLE);
+
+ return snd_pcm_hw_constraint_eld(substream->runtime,
+ hdmi->connector.eld);
+}
+
+static void sun4i_hdmi_audio_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_card *card = snd_soc_dai_get_drvdata(dai);
+ struct sun4i_hdmi_audio *priv = snd_soc_card_get_drvdata(card);
+ struct sun4i_hdmi *hdmi = dev_get_drvdata(priv->hdmi);
+
+ regmap_write(hdmi->regmap, SUN4I_HDMI_AUDIO_CTRL_REG, 0);
+}
+
+static int sun4i_hdmi_setup_audio_infoframes(struct sun4i_hdmi_audio *priv)
+{
+ struct sun4i_hdmi *hdmi = dev_get_drvdata(priv->hdmi);
+ union hdmi_infoframe frame;
+ u8 buffer[14];
+ int i, ret;
+
+ ret = hdmi_audio_infoframe_init(&frame.audio);
+ if (ret < 0) {
+ DRM_ERROR("Failed to init HDMI audio infoframe\n");
+ return ret;
+ }
+
+ frame.audio.coding_type = HDMI_AUDIO_CODING_TYPE_STREAM;
+ frame.audio.sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_STREAM;
+ frame.audio.sample_size = HDMI_AUDIO_SAMPLE_SIZE_STREAM;
+ frame.audio.channels = priv->audio_channels;
+
+ ret = hdmi_infoframe_pack(&frame, buffer, sizeof(buffer));
+ if (ret < 0) {
+ DRM_ERROR("Failed to pack HDMI audio infoframe\n");
+ return ret;
+ }
+
+ for (i = 0; i < sizeof(buffer); i++)
+ writeb(buffer[i],
+ hdmi->base + SUN4I_HDMI_AUDIO_INFOFRAME_REG(i));
+
+ return 0;
+}
+
+static void sun4i_hdmi_audio_set_cts_n(struct sun4i_hdmi_audio *priv,
+ struct snd_pcm_hw_params *params)
+{
+ struct sun4i_hdmi *hdmi = dev_get_drvdata(priv->hdmi);
+ struct drm_encoder *encoder = &hdmi->encoder;
+ struct drm_crtc *crtc = encoder->crtc;
+ const struct drm_display_mode *mode = &crtc->state->adjusted_mode;
+ u32 rate = params_rate(params);
+ u32 n, cts;
+ u64 tmp;
+
+ /**
+ * Calculate Cycle Time Stamp (CTS) and Numerator (N):
+ *
+ * N = 128 * Samplerate / 1000
+ * CTS = (Ftdms * N) / (128 * Samplerate)
+ */
+
+ n = 128 * rate / 1000;
+ tmp = (u64)(mode->clock * 1000) * n;
+ do_div(tmp, 128 * rate);
+ cts = tmp;
+
+ regmap_write(hdmi->regmap,
+ SUN4I_HDMI_AUDIO_CTS_REG,
+ SUN4I_HDMI_AUDIO_CTS(cts));
+
+ regmap_write(hdmi->regmap,
+ SUN4I_HDMI_AUDIO_N_REG,
+ SUN4I_HDMI_AUDIO_N(n));
+}
+
+static int sun4i_hdmi_audio_set_hw_rate(struct sun4i_hdmi_audio *priv,
+ struct snd_pcm_hw_params *params)
+{
+ struct sun4i_hdmi *hdmi = dev_get_drvdata(priv->hdmi);
+ u32 rate = params_rate(params);
+ u32 val;
+
+ switch (rate) {
+ case 44100:
+ val = 0x0;
+ break;
+ case 48000:
+ val = 0x2;
+ break;
+ case 32000:
+ val = 0x3;
+ break;
+ case 88200:
+ val = 0x8;
+ break;
+ case 96000:
+ val = 0x9;
+ break;
+ case 176400:
+ val = 0xc;
+ break;
+ case 192000:
+ val = 0xe;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ regmap_update_bits(hdmi->regmap,
+ SUN4I_HDMI_AUDIO_STAT0_REG,
+ SUN4I_HDMI_AUDIO_STAT0_FREQ_MASK,
+ SUN4I_HDMI_AUDIO_STAT0_FREQ(val));
+
+ return 0;
+}
+
+static int sun4i_hdmi_audio_set_hw_channels(struct sun4i_hdmi_audio *priv,
+ struct snd_pcm_hw_params *params)
+{
+ struct sun4i_hdmi *hdmi = dev_get_drvdata(priv->hdmi);
+ u32 channels = params_channels(params);
+
+ if (channels > 8)
+ return -EINVAL;
+
+ priv->audio_channels = channels;
+
+ regmap_update_bits(hdmi->regmap,
+ SUN4I_HDMI_AUDIO_FMT_REG,
+ SUN4I_HDMI_AUDIO_FMT_LAYOUT,
+ (channels > 2) ? SUN4I_HDMI_AUDIO_FMT_LAYOUT : 0);
+
+ regmap_update_bits(hdmi->regmap,
+ SUN4I_HDMI_AUDIO_FMT_REG,
+ SUN4I_HDMI_AUDIO_FMT_CH_CFG_MASK,
+ SUN4I_HDMI_AUDIO_FMT_CH_CFG(channels));
+
+ regmap_write(hdmi->regmap, SUN4I_HDMI_AUDIO_PCM_REG, 0x76543210);
+
+ /**
+ * If only one channel is required, send the same sample
+ * to the sink device as a left and right channel.
+ */
+ if (channels == 1)
+ regmap_update_bits(hdmi->regmap,
+ SUN4I_HDMI_AUDIO_PCM_REG,
+ SUN4I_HDMI_AUDIO_PCM_CH_MAP_MASK(1),
+ SUN4I_HDMI_AUDIO_PCM_CH_MAP(1, 1));
+
+ return 0;
+}
+
+static int sun4i_hdmi_audio_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_card *card = snd_soc_dai_get_drvdata(dai);
+ struct sun4i_hdmi_audio *priv = snd_soc_card_get_drvdata(card);
+ int ret;
+
+ ret = sun4i_hdmi_audio_set_hw_rate(priv, params);
+ if (ret)
+ return ret;
+
+ ret = sun4i_hdmi_audio_set_hw_channels(priv, params);
+ if (ret)
+ return ret;
+
+ sun4i_hdmi_audio_set_cts_n(priv, params);
+
+ return 0;
+}
+
+static int sun4i_hdmi_audio_trigger(struct snd_pcm_substream *substream,
+ int cmd,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_card *card = snd_soc_dai_get_drvdata(dai);
+ struct sun4i_hdmi_audio *priv = snd_soc_card_get_drvdata(card);
+ int ret = 0;
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ ret = sun4i_hdmi_setup_audio_infoframes(priv);
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
+static const struct snd_soc_dai_ops sun4i_hdmi_audio_dai_ops = {
+ .startup = sun4i_hdmi_audio_startup,
+ .shutdown = sun4i_hdmi_audio_shutdown,
+ .hw_params = sun4i_hdmi_audio_hw_params,
+ .trigger = sun4i_hdmi_audio_trigger,
+};
+
+static int sun4i_hdmi_audio_dai_probe(struct snd_soc_dai *dai)
+{
+ struct snd_dmaengine_dai_dma_data *dma_data;
+
+ dma_data = devm_kzalloc(dai->dev, sizeof(*dma_data), GFP_KERNEL);
+ if (!dma_data)
+ return -ENOMEM;
+
+ dma_data->addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
+ dma_data->maxburst = 8;
+
+ snd_soc_dai_init_dma_data(dai, dma_data, NULL);
+
+ return 0;
+}
+
+static struct snd_soc_dai_driver sun4i_hdmi_audio_dai = {
+ .name = "HDMI",
+ .ops = &sun4i_hdmi_audio_dai_ops,
+ .probe = sun4i_hdmi_audio_dai_probe,
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 1,
+ .channels_max = 8,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,
+ .rates = SNDRV_PCM_RATE_8000_192000,
+ },
+};
+
+static const struct snd_pcm_hardware sun4i_hdmi_audio_pcm_hardware = {
+ .info = SNDRV_PCM_INFO_INTERLEAVED |
+ SNDRV_PCM_INFO_BLOCK_TRANSFER |
+ SNDRV_PCM_INFO_MMAP |
+ SNDRV_PCM_INFO_MMAP_VALID |
+ SNDRV_PCM_INFO_PAUSE |
+ SNDRV_PCM_INFO_RESUME,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE,
+ .rates = SNDRV_PCM_RATE_8000_192000,
+ .rate_min = 8000,
+ .rate_max = 192000,
+ .channels_min = 1,
+ .channels_max = 8,
+ .buffer_bytes_max = 128 * 1024,
+ .period_bytes_min = 4 * 1024,
+ .period_bytes_max = 32 * 1024,
+ .periods_min = 2,
+ .periods_max = 8,
+ .fifo_size = 128,
+};
+
+static const struct snd_dmaengine_pcm_config sun4i_hdmi_audio_pcm_config = {
+ .chan_names[SNDRV_PCM_STREAM_PLAYBACK] = "audio-tx",
+ .pcm_hardware = &sun4i_hdmi_audio_pcm_hardware,
+ .prealloc_buffer_size = 128 * 1024,
+ .prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
+};
+
+struct snd_soc_card sun4i_hdmi_audio_card = {
+ .name = "sun4i-hdmi",
+};
+
+static int sun4i_hdmi_audio_probe(struct platform_device *pdev)
+{
+ struct snd_soc_card *card = &sun4i_hdmi_audio_card;
+ struct snd_soc_dai_link_component *comp;
+ struct snd_soc_dai_link *link;
+ struct device *dev = &pdev->dev;
+ struct sun4i_hdmi_audio *priv;
+ int ret;
+
+ ret = devm_snd_dmaengine_pcm_register(dev,
+ &sun4i_hdmi_audio_pcm_config, 0);
+ if (ret) {
+ dev_err(dev, "Failed registering PCM DMA component\n");
+ return ret;
+ }
+
+ ret = devm_snd_soc_register_component(dev,
+ &sun4i_hdmi_audio_component,
+ &sun4i_hdmi_audio_dai, 1);
+ if (ret) {
+ dev_err(dev, "Failed registering DAI component\n");
+ return ret;
+ }
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+ if (!priv)
+ return -ENOMEM;
+
+ priv->hdmi = dev->parent;
+ dev->of_node = dev->parent->of_node;
+
+ link = devm_kzalloc(dev, sizeof(*link), GFP_KERNEL);
+ if (!link)
+ return -ENOMEM;
+
+ comp = devm_kzalloc(dev, sizeof(*comp) * 3, GFP_KERNEL);
+ if (!comp)
+ return -ENOMEM;
+
+ link->cpus = &comp[0];
+ link->codecs = &comp[1];
+ link->platforms = &comp[2];
+
+ link->num_cpus = 1;
+ link->num_codecs = 1;
+ link->num_platforms = 1;
+
+ link->playback_only = 1;
+
+ link->name = "SUN4I-HDMI";
+ link->stream_name = "SUN4I-HDMI PCM";
+
+ link->codecs->name = dev_name(dev);
+ link->codecs->dai_name = sun4i_hdmi_audio_dai.name;
+
+ link->cpus->dai_name = dev_name(dev);
+
+ link->platforms->name = dev_name(dev);
+
+ link->dai_fmt = SND_SOC_DAIFMT_I2S;
+
+ card->dai_link = link;
+ card->num_links = 1;
+ card->dev = dev;
+
+ snd_soc_card_set_drvdata(card, priv);
+ return devm_snd_soc_register_card(dev, card);
+}
+
+static int sun4i_hdmi_audio_remove(struct platform_device *pdev)
+{
+ return 0;
+}
+
+static struct platform_driver sun4i_hdmi_audio_driver = {
+ .probe = sun4i_hdmi_audio_probe,
+ .remove = sun4i_hdmi_audio_remove,
+ .driver = {
+ .name = DRIVER_NAME,
+ },
+};
+module_platform_driver(sun4i_hdmi_audio_driver);
+
+MODULE_AUTHOR("Stefan Mavrodiev <stefan@xxxxxxxxxx");
+MODULE_DESCRIPTION("Allwinner A10 HDMI Audio driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:" DRIVER_NAME);
diff --git a/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c b/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c
index 68d4644ac2dc..ec598b5a1d3a 100644
--- a/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c
+++ b/drivers/gpu/drm/sun4i/sun4i_hdmi_enc.c
@@ -92,6 +92,11 @@ static void sun4i_hdmi_disable(struct drm_encoder *encoder)
writel(val, hdmi->base + SUN4I_HDMI_VID_CTRL_REG);
clk_disable_unprepare(hdmi->tmds_clk);
+
+ if (hdmi->audio) {
+ platform_device_unregister(hdmi->audio);
+ hdmi->audio = NULL;
+ }
}
static void sun4i_hdmi_enable(struct drm_encoder *encoder)
@@ -114,6 +119,20 @@ static void sun4i_hdmi_enable(struct drm_encoder *encoder)
val |= SUN4I_HDMI_VID_CTRL_HDMI_MODE;
writel(val, hdmi->base + SUN4I_HDMI_VID_CTRL_REG);
+
+ if (hdmi->hdmi_audio) {
+ struct platform_device_info pdevinfo;
+
+ memset(&pdevinfo, 0, sizeof(pdevinfo));
+ pdevinfo.name = "sun4i-hdmi-audio";
+ pdevinfo.parent = hdmi->dev;
+ pdevinfo.id = PLATFORM_DEVID_AUTO;
+ hdmi->audio = platform_device_register_full(&pdevinfo);
+ if (IS_ERR(hdmi->audio)) {
+ DRM_ERROR("Couldn't create the HDMI audio adapter\n");
+ hdmi->audio = NULL;
+ }
+ }
}
static void sun4i_hdmi_mode_set(struct drm_encoder *encoder,
@@ -218,6 +237,7 @@ static int sun4i_hdmi_get_modes(struct drm_connector *connector)
if (!edid)
return 0;
+ hdmi->hdmi_audio = drm_detect_monitor_audio(edid);
hdmi->hdmi_monitor = drm_detect_hdmi_monitor(edid);
DRM_DEBUG_DRIVER("Monitor is %s monitor\n",
hdmi->hdmi_monitor ? "an HDMI" : "a DVI");
--
2.17.1