2017년 10월 12일 18:51에 Sylwester Nawrocki 이(가) 쓴 글:
> On 09/26/2017 04:17 PM, Sylwester Nawrocki wrote:
>> The hdmi-codec interface added in this patch is required to properly
>> support HDMI audio. Currently the audio part of the SoC internal
>> HDMI transmitter is configured with fixed values, which makes HDMI
>> audio working by chance, only on boards having an external audio
>> codec connected in parallel with the HDMI audio transmitter's input
>> I2S interface.
>>
>> Signed-off-by: Sylwester Nawrocki <s.nawrocki@xxxxxxxxxxx>
>> Reviewed-by: Andrzej Hajda <a.hajda@xxxxxxxxxxx>
>
> Any comments on this patch?
I will review this patch including other patch series which should go to -next at end of this week.
Thanks,
Inki Dae
>
> Thanks,
> Sylwester
>
>> ---
>> Tested on Odroid XU3 and Odroid XU4 with Ubuntu 14.04.
>>
>> Changes since v2:
>> - u8 replaced with bool type,
>> - the HDMI codec iec.status data used directly for setting up
>> the HDMI controller registers rather than using hard coded
>> constants,
>> - constants used for configuring the HDMI_AUI_CON register
>> instead of plain numbers,
>> - if/IS_ERR/return replaced with PTR_ERR_OR_ZERO().
>>
>> Changes since v1:
>> - rebased onto v4.14-rc1 and adapted locking
>>
>> Changes since RFC version:
>> - fixed hdmi-codec locking issue
>> - added a comment documenting struct hdmi_contex::mutex
>> ---
>> drivers/gpu/drm/exynos/Kconfig | 1 +
>> drivers/gpu/drm/exynos/exynos_hdmi.c | 253 ++++++++++++++++++++++++++---------
>> drivers/gpu/drm/exynos/regs-hdmi.h | 8 +-
>> 3 files changed, 197 insertions(+), 65 deletions(-)
>>
>> diff --git a/drivers/gpu/drm/exynos/Kconfig b/drivers/gpu/drm/exynos/Kconfig
>> index 305dc3d..5a7c9d8 100644
>> --- a/drivers/gpu/drm/exynos/Kconfig
>> +++ b/drivers/gpu/drm/exynos/Kconfig
>> @@ -3,6 +3,7 @@ config DRM_EXYNOS
>> depends on OF && DRM && (ARCH_S3C64XX || ARCH_EXYNOS || ARCH_MULTIPLATFORM)
>> select DRM_KMS_HELPER
>> select VIDEOMODE_HELPERS
>> + select SND_SOC_HDMI_CODEC if SND_SOC
>> help
>> Choose this option if you have a Samsung SoC EXYNOS chipset.
>> If M is selected the module will be called exynosdrm.
>> diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c
>> index 214fa5e..d2b389a 100644
>> --- a/drivers/gpu/drm/exynos/exynos_hdmi.c
>> +++ b/drivers/gpu/drm/exynos/exynos_hdmi.c
>> @@ -40,7 +40,7 @@
>> #include <linux/component.h>
>> #include <linux/mfd/syscon.h>
>> #include <linux/regmap.h>
>> -
>> +#include <sound/hdmi-codec.h>
>> #include <drm/exynos_drm.h>
>>
>> #include <media/cec-notifier.h>
>> @@ -111,12 +111,18 @@ struct hdmi_driver_data {
>> struct string_array_spec clk_muxes;
>> };
>>
>> +struct hdmi_audio {
>> + struct platform_device *pdev;
>> + struct hdmi_audio_infoframe infoframe;
>> + struct hdmi_codec_params params;
>> + bool enable;
>> +};
>> +
>> struct hdmi_context {
>> struct drm_encoder encoder;
>> struct device *dev;
>> struct drm_device *drm_dev;
>> struct drm_connector connector;
>> - bool powered;
>> bool dvi_mode;
>> struct delayed_work hotplug_work;
>> struct drm_display_mode current_mode;
>> @@ -137,6 +143,11 @@ struct hdmi_context {
>> struct regulator *reg_hdmi_en;
>> struct exynos_drm_clk phy_clk;
>> struct drm_bridge *bridge;
>> +
>> + /* mutex protecting subsequent fields below */
>> + struct mutex mutex;
>> + struct hdmi_audio audio;
>> + bool powered;
>> };
>>
>> static inline struct hdmi_context *encoder_to_hdmi(struct drm_encoder *e)
>> @@ -768,6 +779,22 @@ static int hdmi_clk_set_parents(struct hdmi_context *hdata, bool to_phy)
>> return ret;
>> }
>>
>> +static int hdmi_audio_infoframe_apply(struct hdmi_context *hdata)
>> +{
>> + struct hdmi_audio_infoframe *infoframe = &hdata->audio.infoframe;
>> + u8 buf[HDMI_INFOFRAME_SIZE(AUDIO)];
>> + int len;
>> +
>> + len = hdmi_audio_infoframe_pack(infoframe, buf, sizeof(buf));
>> + if (len < 0)
>> + return len;
>> +
>> + hdmi_reg_writeb(hdata, HDMI_AUI_CON, HDMI_AUI_CON_EVERY_VSYNC);
>> + hdmi_reg_write_buf(hdata, HDMI_AUI_HEADER0, buf, len);
>> +
>> + return 0;
>> +}
>> +
>> static void hdmi_reg_infoframes(struct hdmi_context *hdata)
>> {
>> union hdmi_infoframe frm;
>> @@ -805,15 +832,7 @@ static void hdmi_reg_infoframes(struct hdmi_context *hdata)
>> hdmi_reg_write_buf(hdata, HDMI_VSI_DATA(0), buf + 3, ret - 3);
>> }
>>
>> - ret = hdmi_audio_infoframe_init(&frm.audio);
>> - if (!ret) {
>> - frm.audio.channels = 2;
>> - ret = hdmi_audio_infoframe_pack(&frm.audio, buf, sizeof(buf));
>> - }
>> - if (ret > 0) {
>> - hdmi_reg_writeb(hdata, HDMI_AUI_CON, HDMI_AUI_CON_EVERY_VSYNC);
>> - hdmi_reg_write_buf(hdata, HDMI_AUI_HEADER0, buf, ret);
>> - }
>> + hdmi_audio_infoframe_apply(hdata);
>> }
>>
>> static enum drm_connector_status hdmi_detect(struct drm_connector *connector,
>> @@ -995,23 +1014,18 @@ static void hdmi_reg_acr(struct hdmi_context *hdata, u32 freq)
>> hdmi_reg_writeb(hdata, HDMI_ACR_CON, 4);
>> }
>>
>> -static void hdmi_audio_init(struct hdmi_context *hdata)
>> +static void hdmi_audio_config(struct hdmi_context *hdata)
>> {
>> - u32 sample_rate, bits_per_sample;
>> - u32 data_num, bit_ch, sample_frq;
>> - u32 val;
>> -
>> - sample_rate = 44100;
>> - bits_per_sample = 16;
>> + u32 bit_ch = 1;
>> + u32 data_num, val;
>> + int i;
>>
>> - switch (bits_per_sample) {
>> + switch (hdata->audio.params.sample_width) {
>> case 20:
>> data_num = 2;
>> - bit_ch = 1;
>> break;
>> case 24:
>> data_num = 3;
>> - bit_ch = 1;
>> break;
>> default:
>> data_num = 1;
>> @@ -1019,7 +1033,7 @@ static void hdmi_audio_init(struct hdmi_context *hdata)
>> break;
>> }
>>
>> - hdmi_reg_acr(hdata, sample_rate);
>> + hdmi_reg_acr(hdata, hdata->audio.params.sample_rate);
>>
>> hdmi_reg_writeb(hdata, HDMI_I2S_MUX_CON, HDMI_I2S_IN_DISABLE
>> | HDMI_I2S_AUD_I2S | HDMI_I2S_CUV_I2S_ENABLE
>> @@ -1029,12 +1043,6 @@ static void hdmi_audio_init(struct hdmi_context *hdata)
>> | HDMI_I2S_CH1_EN | HDMI_I2S_CH2_EN);
>>
>> hdmi_reg_writeb(hdata, HDMI_I2S_MUX_CUV, HDMI_I2S_CUV_RL_EN);
>> -
>> - sample_frq = (sample_rate == 44100) ? 0 :
>> - (sample_rate == 48000) ? 2 :
>> - (sample_rate == 32000) ? 3 :
>> - (sample_rate == 96000) ? 0xa : 0x0;
>> -
>> hdmi_reg_writeb(hdata, HDMI_I2S_CLK_CON, HDMI_I2S_CLK_DIS);
>> hdmi_reg_writeb(hdata, HDMI_I2S_CLK_CON, HDMI_I2S_CLK_EN);
>>
>> @@ -1058,31 +1066,24 @@ static void hdmi_audio_init(struct hdmi_context *hdata)
>> | HDMI_I2S_SET_SDATA_BIT(data_num)
>> | HDMI_I2S_BASIC_FORMAT);
>>
>> - /* Configure register related to CUV information */
>> - hdmi_reg_writeb(hdata, HDMI_I2S_CH_ST_0, HDMI_I2S_CH_STATUS_MODE_0
>> - | HDMI_I2S_2AUD_CH_WITHOUT_PREEMPH
>> - | HDMI_I2S_COPYRIGHT
>> - | HDMI_I2S_LINEAR_PCM
>> - | HDMI_I2S_CONSUMER_FORMAT);
>> - hdmi_reg_writeb(hdata, HDMI_I2S_CH_ST_1, HDMI_I2S_CD_PLAYER);
>> - hdmi_reg_writeb(hdata, HDMI_I2S_CH_ST_2, HDMI_I2S_SET_SOURCE_NUM(0));
>> - hdmi_reg_writeb(hdata, HDMI_I2S_CH_ST_3, HDMI_I2S_CLK_ACCUR_LEVEL_2
>> - | HDMI_I2S_SET_SMP_FREQ(sample_frq));
>> - hdmi_reg_writeb(hdata, HDMI_I2S_CH_ST_4,
>> - HDMI_I2S_ORG_SMP_FREQ_44_1
>> - | HDMI_I2S_WORD_LEN_MAX24_24BITS
>> - | HDMI_I2S_WORD_LEN_MAX_24BITS);
>> + /* Configure registers related to CUV information */
>> + for (i = 0; i < HDMI_I2S_CH_ST_MAXNUM; i++)
>> + hdmi_reg_writeb(hdata, HDMI_I2S_CH_ST(i),
>> + hdata->audio.params.iec.status[i]);
>>
>> hdmi_reg_writeb(hdata, HDMI_I2S_CH_ST_CON, HDMI_I2S_CH_STATUS_RELOAD);
>> }
>>
>> -static void hdmi_audio_control(struct hdmi_context *hdata, bool onoff)
>> +static void hdmi_audio_control(struct hdmi_context *hdata)
>> {
>> + bool enable = hdata->audio.enable;
>> +
>> if (hdata->dvi_mode)
>> return;
>>
>> - hdmi_reg_writeb(hdata, HDMI_AUI_CON, onoff ? 2 : 0);
>> - hdmi_reg_writemask(hdata, HDMI_CON_0, onoff ?
>> + hdmi_reg_writeb(hdata, HDMI_AUI_CON, enable ?
>> + HDMI_AVI_CON_EVERY_VSYNC : HDMI_AUI_CON_NO_TRAN);
>> + hdmi_reg_writemask(hdata, HDMI_CON_0, enable ?
>> HDMI_ASP_EN : HDMI_ASP_DIS, HDMI_ASP_MASK);
>> }
>>
>> @@ -1398,13 +1399,14 @@ static void hdmiphy_conf_apply(struct hdmi_context *hdata)
>> hdmiphy_wait_for_pll(hdata);
>> }
>>
>> +/* Should be called with hdata->mutex mutex held */
>> static void hdmi_conf_apply(struct hdmi_context *hdata)
>> {
>> hdmi_start(hdata, false);
>> hdmi_conf_init(hdata);
>> - hdmi_audio_init(hdata);
>> + hdmi_audio_config(hdata);
>> hdmi_mode_apply(hdata);
>> - hdmi_audio_control(hdata, true);
>> + hdmi_audio_control(hdata);
>> }
>>
>> static void hdmi_mode_set(struct drm_encoder *encoder,
>> @@ -1431,6 +1433,7 @@ static void hdmi_set_refclk(struct hdmi_context *hdata, bool on)
>> SYSREG_HDMI_REFCLK_INT_CLK, on ? ~0 : 0);
>> }
>>
>> +/* Should be called with hdata->mutex mutex held. */
>> static void hdmiphy_enable(struct hdmi_context *hdata)
>> {
>> if (hdata->powered)
>> @@ -1453,6 +1456,7 @@ static void hdmiphy_enable(struct hdmi_context *hdata)
>> hdata->powered = true;
>> }
>>
>> +/* Should be called with hdata->mutex mutex held. */
>> static void hdmiphy_disable(struct hdmi_context *hdata)
>> {
>> if (!hdata->powered)
>> @@ -1478,28 +1482,38 @@ static void hdmi_enable(struct drm_encoder *encoder)
>> {
>> struct hdmi_context *hdata = encoder_to_hdmi(encoder);
>>
>> + mutex_lock(&hdata->mutex);
>> +
>> hdmiphy_enable(hdata);
>> hdmi_conf_apply(hdata);
>> +
>> + mutex_unlock(&hdata->mutex);
>> }
>>
>> static void hdmi_disable(struct drm_encoder *encoder)
>> {
>> struct hdmi_context *hdata = encoder_to_hdmi(encoder);
>>
>> - if (!hdata->powered)
>> + mutex_lock(&hdata->mutex);
>> +
>> + if (hdata->powered) {
>> + /*
>> + * The SFRs of VP and Mixer are updated by Vertical Sync of
>> + * Timing generator which is a part of HDMI so the sequence
>> + * to disable TV Subsystem should be as following,
>> + * VP -> Mixer -> HDMI
>> + *
>> + * To achieve such sequence HDMI is disabled together with
>> + * HDMI PHY, via pipe clock callback.
>> + */
>> + mutex_unlock(&hdata->mutex);
>> + cancel_delayed_work(&hdata->hotplug_work);
>> + cec_notifier_set_phys_addr(hdata->notifier,
>> + CEC_PHYS_ADDR_INVALID);
>> return;
>> + }
>>
>> - /*
>> - * The SFRs of VP and Mixer are updated by Vertical Sync of
>> - * Timing generator which is a part of HDMI so the sequence
>> - * to disable TV Subsystem should be as following,
>> - * VP -> Mixer -> HDMI
>> - *
>> - * To achieve such sequence HDMI is disabled together with HDMI PHY, via
>> - * pipe clock callback.
>> - */
>> - cancel_delayed_work(&hdata->hotplug_work);
>> - cec_notifier_set_phys_addr(hdata->notifier, CEC_PHYS_ADDR_INVALID);
>> + mutex_unlock(&hdata->mutex);
>> }
>>
>> static const struct drm_encoder_helper_funcs exynos_hdmi_encoder_helper_funcs = {
>> @@ -1513,6 +1527,104 @@ static void hdmi_disable(struct drm_encoder *encoder)
>> .destroy = drm_encoder_cleanup,
>> };
>>
>> +static void hdmi_audio_shutdown(struct device *dev, void *data)
>> +{
>> + struct hdmi_context *hdata = dev_get_drvdata(dev);
>> +
>> + mutex_lock(&hdata->mutex);
>> +
>> + hdata->audio.enable = false;
>> +
>> + if (hdata->powered)
>> + hdmi_audio_control(hdata);
>> +
>> + mutex_unlock(&hdata->mutex);
>> +}
>> +
>> +static int hdmi_audio_hw_params(struct device *dev, void *data,
>> + struct hdmi_codec_daifmt *daifmt,
>> + struct hdmi_codec_params *params)
>> +{
>> + struct hdmi_context *hdata = dev_get_drvdata(dev);
>> +
>> + if (daifmt->fmt != HDMI_I2S || daifmt->bit_clk_inv ||
>> + daifmt->frame_clk_inv || daifmt->bit_clk_master ||
>> + daifmt->frame_clk_master) {
>> + dev_err(dev, "%s: Bad flags %d %d %d %d\n", __func__,
>> + daifmt->bit_clk_inv, daifmt->frame_clk_inv,
>> + daifmt->bit_clk_master,
>> + daifmt->frame_clk_master);
>> + return -EINVAL;
>> + }
>> +
>> + mutex_lock(&hdata->mutex);
>> +
>> + hdata->audio.params = *params;
>> +
>> + if (hdata->powered) {
>> + hdmi_audio_config(hdata);
>> + hdmi_audio_infoframe_apply(hdata);
>> + }
>> +
>> + mutex_unlock(&hdata->mutex);
>> +
>> + return 0;
>> +}
>> +
>> +static int hdmi_audio_digital_mute(struct device *dev, void *data, bool mute)
>> +{
>> + struct hdmi_context *hdata = dev_get_drvdata(dev);
>> +
>> + mutex_lock(&hdata->mutex);
>> +
>> + hdata->audio.enable = !mute;
>> +
>> + if (hdata->powered)
>> + hdmi_audio_control(hdata);
>> +
>> + mutex_unlock(&hdata->mutex);
>> +
>> + return 0;
>> +}
>> +
>> +static int hdmi_audio_get_eld(struct device *dev, void *data, uint8_t *buf,
>> + size_t len)
>> +{
>> + struct hdmi_context *hdata = dev_get_drvdata(dev);
>> + struct drm_connector *connector = &hdata->connector;
>> +
>> + memcpy(buf, connector->eld, min(sizeof(connector->eld), len));
>> +
>> + return 0;
>> +}
>> +
>> +static const struct hdmi_codec_ops audio_codec_ops = {
>> + .hw_params = hdmi_audio_hw_params,
>> + .audio_shutdown = hdmi_audio_shutdown,
>> + .digital_mute = hdmi_audio_digital_mute,
>> + .get_eld = hdmi_audio_get_eld,
>> +};
>> +
>> +static int hdmi_register_audio_device(struct hdmi_context *hdata)
>> +{
>> + struct hdmi_codec_pdata codec_data = {
>> + .ops = &audio_codec_ops,
>> + .max_i2s_channels = 6,
>> + .i2s = 1,
>> + };
>> +
>> + hdata->audio.pdev = platform_device_register_data(
>> + hdata->dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO,
>> + &codec_data, sizeof(codec_data));
>> +
>> + return PTR_ERR_OR_ZERO(hdata->audio.pdev);
>> +}
>> +
>> +static void hdmi_unregister_audio_device(struct hdmi_context *hdata)
>> +{
>> + platform_device_unregister(hdata->audio.pdev);
>> +}
>> +
>> static void hdmi_hotplug_work_func(struct work_struct *work)
>> {
>> struct hdmi_context *hdata;
>> @@ -1588,11 +1700,14 @@ static void hdmiphy_clk_enable(struct exynos_drm_clk *clk, bool enable)
>> {
>> struct hdmi_context *hdata = container_of(clk, struct hdmi_context,
>> phy_clk);
>> + mutex_lock(&hdata->mutex);
>>
>> if (enable)
>> hdmiphy_enable(hdata);
>> else
>> hdmiphy_disable(hdata);
>> +
>> + mutex_unlock(&hdata->mutex);
>> }
>>
>> static int hdmi_bridge_init(struct hdmi_context *hdata)
>> @@ -1697,6 +1812,7 @@ static int hdmi_bind(struct device *dev, struct device *master, void *data)
>> struct drm_device *drm_dev = data;
>> struct hdmi_context *hdata = dev_get_drvdata(dev);
>> struct drm_encoder *encoder = &hdata->encoder;
>> + struct hdmi_audio_infoframe *audio_infoframe = &hdata->audio.infoframe;
>> struct exynos_drm_crtc *crtc;
>> int ret;
>>
>> @@ -1704,6 +1820,12 @@ static int hdmi_bind(struct device *dev, struct device *master, void *data)
>>
>> hdata->phy_clk.enable = hdmiphy_clk_enable;
>>
>> + hdmi_audio_infoframe_init(audio_infoframe);
>> + audio_infoframe->coding_type = HDMI_AUDIO_CODING_TYPE_STREAM;
>> + audio_infoframe->sample_size = HDMI_AUDIO_SAMPLE_SIZE_STREAM;
>> + audio_infoframe->sample_frequency = HDMI_AUDIO_SAMPLE_FREQUENCY_STREAM;
>> + audio_infoframe->channels = 2;
>> +
>> drm_encoder_init(drm_dev, encoder, &exynos_hdmi_encoder_funcs,
>> DRM_MODE_ENCODER_TMDS, NULL);
>>
>> @@ -1818,6 +1940,8 @@ static int hdmi_probe(struct platform_device *pdev)
>>
>> hdata->dev = dev;
>>
>> + mutex_init(&hdata->mutex);
>> +
>> ret = hdmi_resources_init(hdata);
>> if (ret) {
>> if (ret != -EPROBE_DEFER)
>> @@ -1877,12 +2001,19 @@ static int hdmi_probe(struct platform_device *pdev)
>>
>> pm_runtime_enable(dev);
>>
>> - ret = component_add(&pdev->dev, &hdmi_component_ops);
>> + ret = hdmi_register_audio_device(hdata);
>> if (ret)
>> goto err_notifier_put;
>>
>> + ret = component_add(&pdev->dev, &hdmi_component_ops);
>> + if (ret)
>> + goto err_unregister_audio;
>> +
>> return ret;
>>
>> +err_unregister_audio:
>> + hdmi_unregister_audio_device(hdata);
>> +
>> err_notifier_put:
>> cec_notifier_put(hdata->notifier);
>> pm_runtime_disable(dev);
>> @@ -1921,6 +2052,8 @@ static int hdmi_remove(struct platform_device *pdev)
>>
>> put_device(&hdata->ddc_adpt->dev);
>>
>> + mutex_destroy(&hdata->mutex);
>> +
>> return 0;
>> }
>>
>> diff --git a/drivers/gpu/drm/exynos/regs-hdmi.h b/drivers/gpu/drm/exynos/regs-hdmi.h
>> index a0507dc..d843b1f 100644
>> --- a/drivers/gpu/drm/exynos/regs-hdmi.h
>> +++ b/drivers/gpu/drm/exynos/regs-hdmi.h
>> @@ -419,11 +419,9 @@
>> #define HDMI_I2S_DSD_CON HDMI_I2S_BASE(0x01c)
>> #define HDMI_I2S_MUX_CON HDMI_I2S_BASE(0x020)
>> #define HDMI_I2S_CH_ST_CON HDMI_I2S_BASE(0x024)
>> -#define HDMI_I2S_CH_ST_0 HDMI_I2S_BASE(0x028)
>> -#define HDMI_I2S_CH_ST_1 HDMI_I2S_BASE(0x02c)
>> -#define HDMI_I2S_CH_ST_2 HDMI_I2S_BASE(0x030)
>> -#define HDMI_I2S_CH_ST_3 HDMI_I2S_BASE(0x034)
>> -#define HDMI_I2S_CH_ST_4 HDMI_I2S_BASE(0x038)
>> +/* n must be withing range 0...(HDMI_I2S_CH_ST_MAXNUM - 1) */
>> +#define HDMI_I2S_CH_ST_MAXNUM 5
>> +#define HDMI_I2S_CH_ST(n) HDMI_I2S_BASE(0x028 + 4 * (n))
>> #define HDMI_I2S_CH_ST_SH_0 HDMI_I2S_BASE(0x03c)
>> #define HDMI_I2S_CH_ST_SH_1 HDMI_I2S_BASE(0x040)
>> #define HDMI_I2S_CH_ST_SH_2 HDMI_I2S_BASE(0x044)
>> --
>> 1.9.1
>
>
>
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