Re: [PATCH 1/3] drm/rockchip: inno_hdmi: add audio support

From: Heiko Stübner
Date: Wed Aug 03 2016 - 15:22:14 EST

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In reply to: Yakir Yang: "Re: [PATCH 1/3] drm/rockchip: inno_hdmi: add audio support"
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Am Dienstag, 2. August 2016, 10:16:04 schrieb Yakir Yang:
> Hi Mark & Heiko,
>
> Ping......

devicetree side looks good, so we're waiting on Mark to pick up patch 1.

Heiko

> On 06/15/2016 09:28 PM, Yakir Yang wrote:
> > Using the common hdmi-codec driver to support hdmi audio function.
> >
> > Signed-off-by: Yakir Yang <ykk@xxxxxxxxxxxxxx>
> > ---
> >
> > drivers/gpu/drm/rockchip/inno_hdmi.c | 237
> > ++++++++++++++++++++++++++++++++++-
> > drivers/gpu/drm/rockchip/inno_hdmi.h | 2 +
> > 2 files changed, 237 insertions(+), 2 deletions(-)
> >
> > diff --git a/drivers/gpu/drm/rockchip/inno_hdmi.c
> > b/drivers/gpu/drm/rockchip/inno_hdmi.c index f8b4feb..c31dc07 100644
> > --- a/drivers/gpu/drm/rockchip/inno_hdmi.c
> > +++ b/drivers/gpu/drm/rockchip/inno_hdmi.c
> > @@ -29,6 +29,8 @@
> >
> > #include <drm/drm_crtc_helper.h>
> > #include <drm/drm_edid.h>
> >
> > +#include <sound/hdmi-codec.h>
> > +
> >
> > #include "rockchip_drm_drv.h"
> > #include "rockchip_drm_vop.h"
> >
> > @@ -36,6 +38,12 @@
> >
> > #define to_inno_hdmi(x) container_of(x, struct inno_hdmi, x)
> >
> > +struct audio_info {
> > + int sample_rate;
> > + int channels;
> > + int sample_width;
> > +};
> > +
> >
> > struct hdmi_data_info {
> >
> > int vic;
> > bool sink_is_hdmi;
> >
> > @@ -71,6 +79,9 @@ struct inno_hdmi {
> >
> > unsigned int tmds_rate;
> >
> > + struct platform_device *audio_pdev;
> > + bool audio_enable;
> > +
> >
> > struct hdmi_data_info hdmi_data;
> > struct drm_display_mode previous_mode;
> >
> > };
> >
> > @@ -306,6 +317,57 @@ static int inno_hdmi_config_video_avi(struct
> > inno_hdmi *hdmi,>
> > return inno_hdmi_upload_frame(hdmi, rc, &frame, INFOFRAME_AVI, 0, 0,
> > 0);
> >
> > }
> >
> > +static int inno_hdmi_config_audio_aai(struct inno_hdmi *hdmi,
> > + struct audio_info *audio)
> > +{
> > + struct hdmi_audio_infoframe *faudio;
> > + union hdmi_infoframe frame;
> > + int rc;
> > +
> > + rc = hdmi_audio_infoframe_init(&frame.audio);
> > + faudio = (struct hdmi_audio_infoframe *)&frame;
> > +
> > + faudio->channels = audio->channels;
> > +
> > + switch (audio->sample_width) {
> > + case 16:
> > + faudio->sample_size = HDMI_AUDIO_SAMPLE_SIZE_16;
> > + break;
> > + case 20:
> > + faudio->sample_size = HDMI_AUDIO_SAMPLE_SIZE_20;
> > + break;
> > + case 24:
> > + faudio->sample_size = HDMI_AUDIO_SAMPLE_SIZE_24;
> > + break;
> > + }
> > +
> > + switch (audio->sample_rate) {
> > + case 32000:
> > + faudio->sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_32000;
> > + break;
> > + case 44100:
> > + faudio->sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_44100;
> > + break;
> > + case 48000:
> > + faudio->sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_48000;
> > + break;
> > + case 88200:
> > + faudio->sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_88200;
> > + break;
> > + case 96000:
> > + faudio->sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_96000;
> > + break;
> > + case 176400:
> > + faudio->sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_176400;
> > + break;
> > + case 192000:
> > + faudio->sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_192000;
> > + break;
> > + }
> > +
> > + return inno_hdmi_upload_frame(hdmi, rc, &frame, INFOFRAME_AAI, 0, 0,
0);
> > +}
> > +
> >
> > static int inno_hdmi_config_video_csc(struct inno_hdmi *hdmi)
> > {
> >
> > struct hdmi_data_info *data = &hdmi->hdmi_data;
> >
> > @@ -478,8 +540,9 @@ static int inno_hdmi_setup(struct inno_hdmi *hdmi,
> >
> > inno_hdmi_i2c_init(hdmi);
> >
> > /* Unmute video and audio output */
> >
> > - hdmi_modb(hdmi, HDMI_AV_MUTE, m_AUDIO_MUTE | m_VIDEO_BLACK,
> > - v_AUDIO_MUTE(0) | v_VIDEO_MUTE(0));
> > + hdmi_modb(hdmi, HDMI_AV_MUTE, m_VIDEO_BLACK, v_VIDEO_MUTE(0));
> > + if (hdmi->audio_enable)
> > + hdmi_modb(hdmi, HDMI_AV_MUTE, m_AUDIO_MUTE, v_AUDIO_MUTE(0));
> >
> > return 0;
> >
> > }
> >
> > @@ -616,6 +679,174 @@ static struct drm_connector_helper_funcs
> > inno_hdmi_connector_helper_funcs = {>
> > .best_encoder = inno_hdmi_connector_best_encoder,
> >
> > };
> >
> > +int inno_hdmi_audio_config_set(struct inno_hdmi *hdmi, struct audio_info
> > *audio) +{
> > + int rate, N, channel;
> > +
> > + if (audio->channels < 3)
> > + channel = I2S_CHANNEL_1_2;
> > + else if (audio->channels < 5)
> > + channel = I2S_CHANNEL_3_4;
> > + else if (audio->channels < 7)
> > + channel = I2S_CHANNEL_5_6;
> > + else
> > + channel = I2S_CHANNEL_7_8;
> > +
> > + switch (audio->sample_rate) {
> > + case 32000:
> > + rate = AUDIO_32K;
> > + N = N_32K;
> > + break;
> > + case 44100:
> > + rate = AUDIO_441K;
> > + N = N_441K;
> > + break;
> > + case 48000:
> > + rate = AUDIO_48K;
> > + N = N_48K;
> > + break;
> > + case 88200:
> > + rate = AUDIO_882K;
> > + N = N_882K;
> > + break;
> > + case 96000:
> > + rate = AUDIO_96K;
> > + N = N_96K;
> > + break;
> > + case 176400:
> > + rate = AUDIO_1764K;
> > + N = N_1764K;
> > + break;
> > + case 192000:
> > + rate = AUDIO_192K;
> > + N = N_192K;
> > + break;
> > + default:
> > + dev_err(hdmi->dev, "[%s] not support such sample rate %d\n",
> > + __func__, audio->sample_rate);
> > + return -ENOENT;
> > + }
> > +
> > + /* set_audio source I2S */
> > + hdmi_writeb(hdmi, HDMI_AUDIO_CTRL1, 0x01);
> > + hdmi_writeb(hdmi, AUDIO_SAMPLE_RATE, rate);
> > + hdmi_writeb(hdmi, AUDIO_I2S_MODE, v_I2S_MODE(I2S_STANDARD) |
> > + v_I2S_CHANNEL(channel));
> > +
> > + hdmi_writeb(hdmi, AUDIO_I2S_MAP, 0x00);
> > + hdmi_writeb(hdmi, AUDIO_I2S_SWAPS_SPDIF, 0);
> > +
> > + /* Set N value */
> > + hdmi_writeb(hdmi, AUDIO_N_H, (N >> 16) & 0x0F);
> > + hdmi_writeb(hdmi, AUDIO_N_M, (N >> 8) & 0xFF);
> > + hdmi_writeb(hdmi, AUDIO_N_L, N & 0xFF);
> > +
> > + /*Set hdmi nlpcm mode to support hdmi bitstream*/
> > + hdmi_writeb(hdmi, HDMI_AUDIO_CHANNEL_STATUS, v_AUDIO_STATUS_NLPCM(0));
> > +
> > + return inno_hdmi_config_audio_aai(hdmi, audio);
> > +}
> > +
> > +static int inno_hdmi_audio_hw_params(struct device *dev,
> > + struct hdmi_codec_daifmt *daifmt,
> > + struct hdmi_codec_params *params)
> > +{
> > + struct inno_hdmi *hdmi = dev_get_drvdata(dev);
> > + struct audio_info audio = {
> > + .sample_width = params->sample_width,
> > + .sample_rate = params->sample_rate,
> > + .channels = params->channels,
> > + };
> > +
> > + if (!hdmi->hdmi_data.sink_has_audio) {
> > + dev_err(hdmi->dev, "Sink do not support audio!\n");
> > + return -ENODEV;
> > + }
> > +
> > + if (!hdmi->encoder.crtc)
> > + return -ENODEV;
> > +
> > + switch (daifmt->fmt) {
> > + case HDMI_I2S:
> > + break;
> > + default:
> > + dev_err(dev, "%s: Invalid format %d\n", __func__, daifmt->fmt);
> > + return -EINVAL;
> > + }
> > +
> > + return inno_hdmi_audio_config_set(hdmi, &audio);
> > +}
> > +
> > +static void inno_hdmi_audio_shutdown(struct device *dev)
> > +{
> > + /* do nothing */
> > +}
> > +
> > +static int inno_hdmi_audio_digital_mute(struct device *dev, bool mute)
> > +{
> > + struct inno_hdmi *hdmi = dev_get_drvdata(dev);
> > +
> > + if (!hdmi->hdmi_data.sink_has_audio) {
> > + dev_err(hdmi->dev, "Sink do not support audio!\n");
> > + return -ENODEV;
> > + }
> > +
> > + hdmi->audio_enable = !mute;
> > +
> > + if (mute)
> > + hdmi_modb(hdmi, HDMI_AV_MUTE, m_AUDIO_MUTE | m_AUDIO_PD,
> > + v_AUDIO_MUTE(1) | v_AUDIO_PD(1));
> > + else
> > + hdmi_modb(hdmi, HDMI_AV_MUTE, m_AUDIO_MUTE | m_AUDIO_PD,
> > + v_AUDIO_MUTE(0) | v_AUDIO_PD(0));
> > +
> > + return 0;
> > +}
> > +
> > +static int inno_hdmi_audio_get_eld(struct device *dev, uint8_t *buf,
> > size_t len) +{
> > + struct inno_hdmi *hdmi = dev_get_drvdata(dev);
> > + struct drm_mode_config *config = &hdmi->encoder.dev->mode_config;
> > + struct drm_connector *connector;
> > + int ret = -ENODEV;
> > +
> > + mutex_lock(&config->mutex);
> > + list_for_each_entry(connector, &config->connector_list, head) {
> > + if (&hdmi->encoder == connector->encoder) {
> > + memcpy(buf, connector->eld,
> > + min(sizeof(connector->eld), len));
> > + ret = 0;
> > + }
> > + }
> > + mutex_unlock(&config->mutex);
> > +
> > + return ret;
> > +}
> > +
> > +static const struct hdmi_codec_ops audio_codec_ops = {
> > + .hw_params = inno_hdmi_audio_hw_params,
> > + .audio_shutdown = inno_hdmi_audio_shutdown,
> > + .digital_mute = inno_hdmi_audio_digital_mute,
> > + .get_eld = inno_hdmi_audio_get_eld,
> > +};
> > +
> > +static int inno_hdmi_audio_codec_init(struct inno_hdmi *hdmi,
> > + struct device *dev)
> > +{
> > + struct hdmi_codec_pdata codec_data = {
> > + .i2s = 1,
> > + .ops = &audio_codec_ops,
> > + .max_i2s_channels = 8,
> > + };
> > +
> > + hdmi->audio_enable = false;
> > + hdmi->audio_pdev = platform_device_register_data(
> > + dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_NONE,
> > + &codec_data, sizeof(codec_data));
> > +
> > + return PTR_ERR_OR_ZERO(hdmi->audio_pdev);
> > +}
> > +
> >
> > static int inno_hdmi_register(struct drm_device *drm, struct inno_hdmi
> > *hdmi) {
> >
> > struct drm_encoder *encoder = &hdmi->encoder;
> >
> > @@ -645,6 +876,8 @@ static int inno_hdmi_register(struct drm_device *drm,
> > struct inno_hdmi *hdmi)>
> > drm_mode_connector_attach_encoder(&hdmi->connector, encoder);
> >
> > + inno_hdmi_audio_codec_init(hdmi, dev);
> > +
> >
> > return 0;
> >
> > }
> >
> > diff --git a/drivers/gpu/drm/rockchip/inno_hdmi.h
> > b/drivers/gpu/drm/rockchip/inno_hdmi.h index aa7c415..8b23037 100644
> > --- a/drivers/gpu/drm/rockchip/inno_hdmi.h
> > +++ b/drivers/gpu/drm/rockchip/inno_hdmi.h
> > @@ -104,11 +104,13 @@ enum {
> >
> > #define HDMI_AV_MUTE 0x05
> > #define m_AVMUTE_CLEAR (1 << 7)
> > #define m_AVMUTE_ENABLE (1 << 6)
> >
> > +#define m_AUDIO_PD (1 << 2)
> >
> > #define m_AUDIO_MUTE (1 << 1)
> > #define m_VIDEO_BLACK (1 << 0)
> > #define v_AVMUTE_CLEAR(n) (n << 7)
> > #define v_AVMUTE_ENABLE(n) (n << 6)
> > #define v_AUDIO_MUTE(n) (n << 1)
> >
> > +#define v_AUDIO_PD(n) (n << 2)
> >
> > #define v_VIDEO_MUTE(n) (n << 0)
> >
> > #define HDMI_VIDEO_TIMING_CTL 0x08

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