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openwrt/target/linux/bcm27xx/patches-5.10/950-0636-drm-vc4-Register-H...

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From 1e6a19ca5f275155a4dd1961d351306b589b11a0 Mon Sep 17 00:00:00 2001
From: Maxime Ripard <maxime@cerno.tech>
Date: Mon, 26 Apr 2021 14:42:26 +0200
Subject: [PATCH] drm/vc4: Register HDMI codec
The hdmi-codec brings a lot of advanced features, including the HDMI
channel mapping. Let's use it in our driver instead of our own codec.
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
---
drivers/gpu/drm/vc4/Kconfig | 1 +
drivers/gpu/drm/vc4/vc4_hdmi.c | 311 +++++++++------------------------
drivers/gpu/drm/vc4/vc4_hdmi.h | 3 +-
3 files changed, 84 insertions(+), 231 deletions(-)
--- a/drivers/gpu/drm/vc4/Kconfig
+++ b/drivers/gpu/drm/vc4/Kconfig
@@ -12,6 +12,7 @@ config DRM_VC4
select SND_PCM
select SND_PCM_ELD
select SND_SOC_GENERIC_DMAENGINE_PCM
+ select SND_SOC_HDMI_CODEC
select DRM_MIPI_DSI
help
Choose this option if you have a system that has a Broadcom
--- a/drivers/gpu/drm/vc4/vc4_hdmi.c
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.c
@@ -47,6 +47,7 @@
#include <linux/reset.h>
#include <sound/asoundef.h>
#include <sound/dmaengine_pcm.h>
+#include <sound/hdmi-codec.h>
#include <sound/pcm_drm_eld.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
@@ -95,6 +96,12 @@
# define VC4_HD_M_ENABLE BIT(0)
#define CEC_CLOCK_FREQ 40000
+#define HDMI_14_MAX_TMDS_CLK (340 * 1000 * 1000)
+
+static bool vc4_hdmi_mode_needs_scrambling(const struct drm_display_mode *mode)
+{
+ return (mode->clock * 1000) > HDMI_14_MAX_TMDS_CLK;
+}
static int vc4_hdmi_debugfs_regs(struct seq_file *m, void *unused)
{
@@ -472,16 +479,10 @@ static void vc4_hdmi_set_spd_infoframe(s
static void vc4_hdmi_set_audio_infoframe(struct drm_encoder *encoder)
{
struct vc4_hdmi *vc4_hdmi = encoder_to_vc4_hdmi(encoder);
+ struct hdmi_audio_infoframe *audio = &vc4_hdmi->audio.infoframe;
union hdmi_infoframe frame;
- int ret;
-
- ret = hdmi_audio_infoframe_init(&frame.audio);
-
- 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 = vc4_hdmi->audio.channels;
+ memcpy(&frame.audio, audio, sizeof(*audio));
vc4_hdmi_write_infoframe(encoder, &frame);
}
@@ -1214,18 +1215,10 @@ static inline struct vc4_hdmi *dai_to_hd
return snd_soc_card_get_drvdata(card);
}
-static int vc4_hdmi_audio_startup(struct snd_pcm_substream *substream,
- struct snd_soc_dai *dai)
+static int vc4_hdmi_audio_startup(struct device *dev, void *data)
{
- struct vc4_hdmi *vc4_hdmi = dai_to_hdmi(dai);
+ struct vc4_hdmi *vc4_hdmi = dev_get_drvdata(dev);
struct drm_encoder *encoder = &vc4_hdmi->encoder.base.base;
- struct drm_connector *connector = &vc4_hdmi->connector;
- int ret;
-
- if (vc4_hdmi->audio.substream && vc4_hdmi->audio.substream != substream)
- return -EINVAL;
-
- vc4_hdmi->audio.substream = substream;
/*
* If the HDMI encoder hasn't probed, or the encoder is
@@ -1235,15 +1228,18 @@ static int vc4_hdmi_audio_startup(struct
VC4_HDMI_RAM_PACKET_ENABLE))
return -ENODEV;
- ret = snd_pcm_hw_constraint_eld(substream->runtime, connector->eld);
- if (ret)
- return ret;
+ vc4_hdmi->audio.streaming = true;
- return 0;
-}
+ HDMI_WRITE(HDMI_MAI_CTL,
+ VC4_HD_MAI_CTL_RESET |
+ VC4_HD_MAI_CTL_FLUSH |
+ VC4_HD_MAI_CTL_DLATE |
+ VC4_HD_MAI_CTL_ERRORE |
+ VC4_HD_MAI_CTL_ERRORF);
+
+ if (vc4_hdmi->variant->phy_rng_enable)
+ vc4_hdmi->variant->phy_rng_enable(vc4_hdmi);
-static int vc4_hdmi_audio_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
-{
return 0;
}
@@ -1263,17 +1259,20 @@ static void vc4_hdmi_audio_reset(struct
HDMI_WRITE(HDMI_MAI_CTL, VC4_HD_MAI_CTL_FLUSH);
}
-static void vc4_hdmi_audio_shutdown(struct snd_pcm_substream *substream,
- struct snd_soc_dai *dai)
+static void vc4_hdmi_audio_shutdown(struct device *dev, void *data)
{
- struct vc4_hdmi *vc4_hdmi = dai_to_hdmi(dai);
+ struct vc4_hdmi *vc4_hdmi = dev_get_drvdata(dev);
- if (substream != vc4_hdmi->audio.substream)
- return;
+ HDMI_WRITE(HDMI_MAI_CTL,
+ VC4_HD_MAI_CTL_DLATE |
+ VC4_HD_MAI_CTL_ERRORE |
+ VC4_HD_MAI_CTL_ERRORF);
- vc4_hdmi_audio_reset(vc4_hdmi);
+ if (vc4_hdmi->variant->phy_rng_disable)
+ vc4_hdmi->variant->phy_rng_disable(vc4_hdmi);
- vc4_hdmi->audio.substream = NULL;
+ vc4_hdmi->audio.streaming = false;
+ vc4_hdmi_audio_reset(vc4_hdmi);
}
static int sample_rate_to_mai_fmt(int samplerate)
@@ -1315,42 +1314,35 @@ static int sample_rate_to_mai_fmt(int sa
}
/* HDMI audio codec callbacks */
-static int vc4_hdmi_audio_prepare(struct snd_pcm_substream *substream,
- struct snd_soc_dai *dai)
+static int vc4_hdmi_audio_prepare(struct device *dev, void *data,
+ struct hdmi_codec_daifmt *daifmt,
+ struct hdmi_codec_params *params)
{
- struct vc4_hdmi *vc4_hdmi = dai_to_hdmi(dai);
+ struct vc4_hdmi *vc4_hdmi = dev_get_drvdata(dev);
struct drm_encoder *encoder = &vc4_hdmi->encoder.base.base;
- struct device *dev = &vc4_hdmi->pdev->dev;
u32 audio_packet_config, channel_mask;
u32 channel_map;
u32 mai_audio_format;
u32 mai_sample_rate;
- if (substream != vc4_hdmi->audio.substream)
- return -EINVAL;
+ dev_dbg(dev, "%s: %u Hz, %d bit, %d channels\n", __func__,
+ params->sample_rate, params->sample_width,
+ params->channels);
- dev_dbg(dev, "%s: %u Hz, %d bit, %d channels AES0=%02x\n",
- __func__,
- substream->runtime->rate,
- snd_pcm_format_width(substream->runtime->format),
- substream->runtime->channels,
- vc4_hdmi->audio.iec_status[0]);
-
- vc4_hdmi->audio.channels = substream->runtime->channels;
- vc4_hdmi->audio.samplerate = substream->runtime->rate;
+ vc4_hdmi->audio.channels = params->channels;
+ vc4_hdmi->audio.samplerate = params->sample_rate;
HDMI_WRITE(HDMI_MAI_CTL,
- VC4_HD_MAI_CTL_RESET |
- VC4_HD_MAI_CTL_FLUSH |
- VC4_HD_MAI_CTL_DLATE |
- VC4_HD_MAI_CTL_ERRORE |
- VC4_HD_MAI_CTL_ERRORF);
+ VC4_SET_FIELD(params->channels, VC4_HD_MAI_CTL_CHNUM) |
+ VC4_HD_MAI_CTL_WHOLSMP |
+ VC4_HD_MAI_CTL_CHALIGN |
+ VC4_HD_MAI_CTL_ENABLE);
vc4_hdmi_audio_set_mai_clock(vc4_hdmi);
mai_sample_rate = sample_rate_to_mai_fmt(vc4_hdmi->audio.samplerate);
- if (vc4_hdmi->audio.iec_status[0] & IEC958_AES0_NONAUDIO &&
- vc4_hdmi->audio.channels == 8)
+ if (params->iec.status[0] & IEC958_AES0_NONAUDIO &&
+ params->channels == 8)
mai_audio_format = VC4_HDMI_MAI_FORMAT_HBR;
else
mai_audio_format = VC4_HDMI_MAI_FORMAT_PCM;
@@ -1387,148 +1379,12 @@ static int vc4_hdmi_audio_prepare(struct
HDMI_WRITE(HDMI_AUDIO_PACKET_CONFIG, audio_packet_config);
vc4_hdmi_set_n_cts(vc4_hdmi);
+ memcpy(&vc4_hdmi->audio.infoframe, &params->cea, sizeof(params->cea));
vc4_hdmi_set_audio_infoframe(encoder);
return 0;
}
-static int vc4_hdmi_audio_trigger(struct snd_pcm_substream *substream, int cmd,
- struct snd_soc_dai *dai)
-{
- struct vc4_hdmi *vc4_hdmi = dai_to_hdmi(dai);
-
- switch (cmd) {
- case SNDRV_PCM_TRIGGER_START:
- vc4_hdmi->audio.streaming = true;
-
- if (vc4_hdmi->variant->phy_rng_enable)
- vc4_hdmi->variant->phy_rng_enable(vc4_hdmi);
-
- HDMI_WRITE(HDMI_MAI_CTL,
- VC4_SET_FIELD(vc4_hdmi->audio.channels,
- VC4_HD_MAI_CTL_CHNUM) |
- VC4_HD_MAI_CTL_WHOLSMP |
- VC4_HD_MAI_CTL_CHALIGN |
- VC4_HD_MAI_CTL_ENABLE);
- break;
- case SNDRV_PCM_TRIGGER_STOP:
- HDMI_WRITE(HDMI_MAI_CTL,
- VC4_HD_MAI_CTL_DLATE |
- VC4_HD_MAI_CTL_ERRORE |
- VC4_HD_MAI_CTL_ERRORF);
-
- if (vc4_hdmi->variant->phy_rng_disable)
- vc4_hdmi->variant->phy_rng_disable(vc4_hdmi);
-
- vc4_hdmi->audio.streaming = false;
-
- break;
- default:
- break;
- }
-
- return 0;
-}
-
-static inline struct vc4_hdmi *
-snd_component_to_hdmi(struct snd_soc_component *component)
-{
- struct snd_soc_card *card = snd_soc_component_get_drvdata(component);
-
- return snd_soc_card_get_drvdata(card);
-}
-
-static int vc4_hdmi_audio_eld_ctl_info(struct snd_kcontrol *kcontrol,
- struct snd_ctl_elem_info *uinfo)
-{
- struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
- struct vc4_hdmi *vc4_hdmi = snd_component_to_hdmi(component);
- struct drm_connector *connector = &vc4_hdmi->connector;
-
- uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
- uinfo->count = sizeof(connector->eld);
-
- return 0;
-}
-
-static int vc4_hdmi_audio_eld_ctl_get(struct snd_kcontrol *kcontrol,
- struct snd_ctl_elem_value *ucontrol)
-{
- struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
- struct vc4_hdmi *vc4_hdmi = snd_component_to_hdmi(component);
- struct drm_connector *connector = &vc4_hdmi->connector;
-
- memcpy(ucontrol->value.bytes.data, connector->eld,
- sizeof(connector->eld));
-
- return 0;
-}
-
-static int vc4_spdif_info(struct snd_kcontrol *kcontrol,
- struct snd_ctl_elem_info *uinfo)
-{
- uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
- uinfo->count = 1;
- return 0;
-}
-
-static int vc4_spdif_playback_get(struct snd_kcontrol *kcontrol,
- struct snd_ctl_elem_value *ucontrol)
-{
- struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
- struct vc4_hdmi *vc4_hdmi = snd_component_to_hdmi(component);
-
- memcpy(ucontrol->value.iec958.status, vc4_hdmi->audio.iec_status,
- sizeof(vc4_hdmi->audio.iec_status));
-
- return 0;
-}
-
-static int vc4_spdif_playback_put(struct snd_kcontrol *kcontrol,
- struct snd_ctl_elem_value *ucontrol)
-{
- struct snd_soc_component *component = snd_kcontrol_chip(kcontrol);
- struct vc4_hdmi *vc4_hdmi = snd_component_to_hdmi(component);
-
- memcpy(vc4_hdmi->audio.iec_status, ucontrol->value.iec958.status,
- sizeof(vc4_hdmi->audio.iec_status));
-
- return 0;
-}
-
-static int vc4_spdif_mask_get(struct snd_kcontrol *kcontrol,
- struct snd_ctl_elem_value *ucontrol)
-{
- memset(ucontrol->value.iec958.status, 0xff,
- sizeof_field(struct vc4_hdmi_audio, iec_status));
-
- return 0;
-}
-
-static const struct snd_kcontrol_new vc4_hdmi_audio_controls[] = {
- {
- .access = SNDRV_CTL_ELEM_ACCESS_READ |
- SNDRV_CTL_ELEM_ACCESS_VOLATILE,
- .iface = SNDRV_CTL_ELEM_IFACE_PCM,
- .name = "ELD",
- .info = vc4_hdmi_audio_eld_ctl_info,
- .get = vc4_hdmi_audio_eld_ctl_get,
- },
- {
- .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
- .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
- .info = vc4_spdif_info,
- .get = vc4_spdif_playback_get,
- .put = vc4_spdif_playback_put,
- },
- {
- .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
- .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, MASK),
- .info = vc4_spdif_info,
- .get = vc4_spdif_mask_get,
- },
-};
-
static const struct snd_soc_dapm_widget vc4_hdmi_audio_widgets[] = {
SND_SOC_DAPM_OUTPUT("TX"),
};
@@ -1539,8 +1395,6 @@ static const struct snd_soc_dapm_route v
static const struct snd_soc_component_driver vc4_hdmi_audio_component_drv = {
.name = "vc4-hdmi-codec-dai-component",
- .controls = vc4_hdmi_audio_controls,
- .num_controls = ARRAY_SIZE(vc4_hdmi_audio_controls),
.dapm_widgets = vc4_hdmi_audio_widgets,
.num_dapm_widgets = ARRAY_SIZE(vc4_hdmi_audio_widgets),
.dapm_routes = vc4_hdmi_audio_routes,
@@ -1551,28 +1405,6 @@ static const struct snd_soc_component_dr
.non_legacy_dai_naming = 1,
};
-static const struct snd_soc_dai_ops vc4_hdmi_audio_dai_ops = {
- .startup = vc4_hdmi_audio_startup,
- .shutdown = vc4_hdmi_audio_shutdown,
- .prepare = vc4_hdmi_audio_prepare,
- .set_fmt = vc4_hdmi_audio_set_fmt,
- .trigger = vc4_hdmi_audio_trigger,
-};
-
-static struct snd_soc_dai_driver vc4_hdmi_audio_codec_dai_drv = {
- .name = "vc4-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_IEC958_SUBFRAME_LE,
- },
-};
-
static const struct snd_soc_component_driver vc4_hdmi_audio_cpu_dai_comp = {
.name = "vc4-hdmi-cpu-dai-component",
};
@@ -1599,7 +1431,6 @@ static struct snd_soc_dai_driver vc4_hdm
SNDRV_PCM_RATE_192000,
.formats = SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE,
},
- .ops = &vc4_hdmi_audio_dai_ops,
};
static const struct snd_dmaengine_pcm_config pcm_conf = {
@@ -1607,6 +1438,31 @@ static const struct snd_dmaengine_pcm_co
.prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
};
+
+static int vc4_hdmi_audio_get_eld(struct device *dev, void *data,
+ uint8_t *buf, size_t len)
+{
+ struct vc4_hdmi *vc4_hdmi = dev_get_drvdata(dev);
+ struct drm_connector *connector = &vc4_hdmi->connector;
+
+ memcpy(buf, connector->eld, min(sizeof(connector->eld), len));
+
+ return 0;
+}
+
+static const struct hdmi_codec_ops vc4_hdmi_codec_ops = {
+ .get_eld = vc4_hdmi_audio_get_eld,
+ .prepare = vc4_hdmi_audio_prepare,
+ .audio_shutdown = vc4_hdmi_audio_shutdown,
+ .audio_startup = vc4_hdmi_audio_startup,
+};
+
+struct hdmi_codec_pdata vc4_hdmi_codec_pdata = {
+ .ops = &vc4_hdmi_codec_ops,
+ .max_i2s_channels = 8,
+ .i2s = 1,
+};
+
static int vc4_hdmi_audio_init(struct vc4_hdmi *vc4_hdmi)
{
const struct vc4_hdmi_register *mai_data =
@@ -1614,6 +1470,7 @@ static int vc4_hdmi_audio_init(struct vc
struct snd_soc_dai_link *dai_link = &vc4_hdmi->audio.link;
struct snd_soc_card *card = &vc4_hdmi->audio.card;
struct device *dev = &vc4_hdmi->pdev->dev;
+ struct platform_device *codec_pdev;
const __be32 *addr;
int index;
int ret;
@@ -1649,11 +1506,6 @@ static int vc4_hdmi_audio_init(struct vc
vc4_hdmi->audio.dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
vc4_hdmi->audio.dma_data.maxburst = 2;
- vc4_hdmi->audio.iec_status[0] = IEC958_AES0_CON_NOT_COPYRIGHT;
- vc4_hdmi->audio.iec_status[1] =
- IEC958_AES1_CON_ORIGINAL | IEC958_AES1_CON_PCM_CODER;
- vc4_hdmi->audio.iec_status[3] = IEC958_AES3_CON_FS_48000;
-
ret = devm_snd_dmaengine_pcm_register(dev, &pcm_conf, 0);
if (ret) {
dev_err(dev, "Could not register PCM component: %d\n", ret);
@@ -1667,12 +1519,13 @@ static int vc4_hdmi_audio_init(struct vc
return ret;
}
- /* register component and codec dai */
- ret = devm_snd_soc_register_component(dev, &vc4_hdmi_audio_component_drv,
- &vc4_hdmi_audio_codec_dai_drv, 1);
- if (ret) {
- dev_err(dev, "Could not register component: %d\n", ret);
- return ret;
+ codec_pdev = platform_device_register_data(dev, HDMI_CODEC_DRV_NAME,
+ PLATFORM_DEVID_AUTO,
+ &vc4_hdmi_codec_pdata,
+ sizeof(vc4_hdmi_codec_pdata));
+ if (IS_ERR(codec_pdev)) {
+ dev_err(dev, "Couldn't register the HDMI codec: %ld\n", PTR_ERR(codec_pdev));
+ return PTR_ERR(codec_pdev);
}
dai_link->cpus = &vc4_hdmi->audio.cpu;
@@ -1685,9 +1538,9 @@ static int vc4_hdmi_audio_init(struct vc
dai_link->name = "MAI";
dai_link->stream_name = "MAI PCM";
- dai_link->codecs->dai_name = vc4_hdmi_audio_codec_dai_drv.name;
+ dai_link->codecs->dai_name = "i2s-hifi";
dai_link->cpus->dai_name = dev_name(dev);
- dai_link->codecs->name = dev_name(dev);
+ dai_link->codecs->name = dev_name(&codec_pdev->dev);
dai_link->platforms->name = dev_name(dev);
card->dai_link = dai_link;
--- a/drivers/gpu/drm/vc4/vc4_hdmi.h
+++ b/drivers/gpu/drm/vc4/vc4_hdmi.h
@@ -114,8 +114,7 @@ struct vc4_hdmi_audio {
int samplerate;
int channels;
struct snd_dmaengine_dai_dma_data dma_data;
- struct snd_pcm_substream *substream;
-
+ struct hdmi_audio_infoframe infoframe;
bool streaming;
unsigned char iec_status[4];
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