Ack-by: Benjamin Gaignard <benjamin.gaignard@xxxxxxxxxx>
2016-05-30 15:31 GMT+02:00 Arnaud Pouliquen <arnaud.pouliquen@xxxxxx>:
> Add the interface needed by audio hdmi-codec driver.
>
> Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@xxxxxx>
> ---
> drivers/gpu/drm/sti/Kconfig | 1 +
> drivers/gpu/drm/sti/sti_hdmi.c | 294 ++++++++++++++++++++++++++++++++++++++---
> drivers/gpu/drm/sti/sti_hdmi.h | 13 ++
> 3 files changed, 291 insertions(+), 17 deletions(-)
>
> diff --git a/drivers/gpu/drm/sti/Kconfig b/drivers/gpu/drm/sti/Kconfig
> index 5ad43a1..494ab25 100644
> --- a/drivers/gpu/drm/sti/Kconfig
> +++ b/drivers/gpu/drm/sti/Kconfig
> @@ -7,5 +7,6 @@ config DRM_STI
> select DRM_KMS_CMA_HELPER
> select DRM_PANEL
> select FW_LOADER
> + select SND_SOC_HDMI_CODEC if SND_SOC
> help
> Choose this option to enable DRM on STM stiH41x chipset
> diff --git a/drivers/gpu/drm/sti/sti_hdmi.c b/drivers/gpu/drm/sti/sti_hdmi.c
> index 6ef0715..f345c2d 100644
> --- a/drivers/gpu/drm/sti/sti_hdmi.c
> +++ b/drivers/gpu/drm/sti/sti_hdmi.c
> @@ -18,6 +18,8 @@
> #include <drm/drm_crtc_helper.h>
> #include <drm/drm_edid.h>
>
> +#include <sound/hdmi-codec.h>
> +
> #include "sti_hdmi.h"
> #include "sti_hdmi_tx3g4c28phy.h"
> #include "sti_hdmi_tx3g0c55phy.h"
> @@ -35,6 +37,8 @@
> #define HDMI_DFLT_CHL0_DAT 0x0110
> #define HDMI_DFLT_CHL1_DAT 0x0114
> #define HDMI_DFLT_CHL2_DAT 0x0118
> +#define HDMI_AUDIO_CFG 0x0200
> +#define HDMI_SPDIF_FIFO_STATUS 0x0204
> #define HDMI_SW_DI_1_HEAD_WORD 0x0210
> #define HDMI_SW_DI_1_PKT_WORD0 0x0214
> #define HDMI_SW_DI_1_PKT_WORD1 0x0218
> @@ -44,6 +48,9 @@
> #define HDMI_SW_DI_1_PKT_WORD5 0x0228
> #define HDMI_SW_DI_1_PKT_WORD6 0x022C
> #define HDMI_SW_DI_CFG 0x0230
> +#define HDMI_SAMPLE_FLAT_MASK 0x0244
> +#define HDMI_AUDN 0x0400
> +#define HDMI_AUD_CTS 0x0404
> #define HDMI_SW_DI_2_HEAD_WORD 0x0600
> #define HDMI_SW_DI_2_PKT_WORD0 0x0604
> #define HDMI_SW_DI_2_PKT_WORD1 0x0608
> @@ -103,6 +110,7 @@
> #define HDMI_INT_DLL_LCK BIT(5)
> #define HDMI_INT_NEW_FRAME BIT(6)
> #define HDMI_INT_GENCTRL_PKT BIT(7)
> +#define HDMI_INT_AUDIO_FIFO_XRUN BIT(8)
> #define HDMI_INT_SINK_TERM_PRESENT BIT(11)
>
> #define HDMI_DEFAULT_INT (HDMI_INT_SINK_TERM_PRESENT \
> @@ -111,6 +119,7 @@
> | HDMI_INT_GLOBAL)
>
> #define HDMI_WORKING_INT (HDMI_INT_SINK_TERM_PRESENT \
> + | HDMI_INT_AUDIO_FIFO_XRUN \
> | HDMI_INT_GENCTRL_PKT \
> | HDMI_INT_NEW_FRAME \
> | HDMI_INT_DLL_LCK \
> @@ -121,6 +130,27 @@
>
> #define HDMI_STA_SW_RST BIT(1)
>
> +#define HDMI_AUD_CFG_8CH BIT(0)
> +#define HDMI_AUD_CFG_SPDIF_DIV_2 BIT(1)
> +#define HDMI_AUD_CFG_SPDIF_DIV_3 BIT(2)
> +#define HDMI_AUD_CFG_SPDIF_CLK_DIV_4 (BIT(1) | BIT(2))
> +#define HDMI_AUD_CFG_CTS_CLK_256FS BIT(12)
> +#define HDMI_AUD_CFG_DTS_INVALID BIT(16)
> +#define HDMI_AUD_CFG_ONE_BIT_INVALID (BIT(18) | BIT(19) | BIT(20) | BIT(21))
> +#define HDMI_AUD_CFG_CH12_VALID BIT(28)
> +#define HDMI_AUD_CFG_CH34_VALID BIT(29)
> +#define HDMI_AUD_CFG_CH56_VALID BIT(30)
> +#define HDMI_AUD_CFG_CH78_VALID BIT(31)
> +
> +/* sample flat mask */
> +#define HDMI_SAMPLE_FLAT_NO 0
> +#define HDMI_SAMPLE_FLAT_SP0 BIT(0)
> +#define HDMI_SAMPLE_FLAT_SP1 BIT(1)
> +#define HDMI_SAMPLE_FLAT_SP2 BIT(2)
> +#define HDMI_SAMPLE_FLAT_SP3 BIT(3)
> +#define HDMI_SAMPLE_FLAT_ALL (HDMI_SAMPLE_FLAT_SP0 | HDMI_SAMPLE_FLAT_SP1 |\
> + HDMI_SAMPLE_FLAT_SP2 | HDMI_SAMPLE_FLAT_SP3)
> +
> #define HDMI_INFOFRAME_HEADER_TYPE(x) (((x) & 0xff) << 0)
> #define HDMI_INFOFRAME_HEADER_VERSION(x) (((x) & 0xff) << 8)
> #define HDMI_INFOFRAME_HEADER_LEN(x) (((x) & 0x0f) << 16)
> @@ -171,6 +201,10 @@ static irqreturn_t hdmi_irq_thread(int irq, void *arg)
> wake_up_interruptible(&hdmi->wait_event);
> }
>
> + /* Audio FIFO underrun IRQ */
> + if (hdmi->irq_status & HDMI_INT_AUDIO_FIFO_XRUN)
> + DRM_INFO("Warning: audio FIFO underrun occurs!");
> +
> return IRQ_HANDLED;
> }
>
> @@ -441,26 +475,29 @@ static int hdmi_avi_infoframe_config(struct sti_hdmi *hdmi)
> */
> static int hdmi_audio_infoframe_config(struct sti_hdmi *hdmi)
> {
> - struct hdmi_audio_infoframe infofame;
> + struct hdmi_audio_params *audio = &hdmi->audio;
> u8 buffer[HDMI_INFOFRAME_SIZE(AUDIO)];
> - int ret;
> -
> - ret = hdmi_audio_infoframe_init(&infofame);
> - if (ret < 0) {
> - DRM_ERROR("failed to setup audio infoframe: %d\n", ret);
> - return ret;
> - }
> -
> - infofame.channels = 2;
> -
> - ret = hdmi_audio_infoframe_pack(&infofame, buffer, sizeof(buffer));
> - if (ret < 0) {
> - DRM_ERROR("failed to pack audio infoframe: %d\n", ret);
> - return ret;
> + int ret, val;
> +
> + DRM_DEBUG_DRIVER("enter %s, AIF %s\n", __func__,
> + audio->enabled ? "enable" : "disable");
> + if (audio->enabled) {
> + /* set audio parameters stored*/
> + ret = hdmi_audio_infoframe_pack(&audio->cea, buffer,
> + sizeof(buffer));
> + if (ret < 0) {
> + DRM_ERROR("failed to pack audio infoframe: %d\n", ret);
> + return ret;
> + }
> + hdmi_infoframe_write_infopack(hdmi, buffer, ret);
> + } else {
> + /*disable audio info frame transmission */
> + val = hdmi_read(hdmi, HDMI_SW_DI_CFG);
> + val &= ~HDMI_IFRAME_CFG_DI_N(HDMI_IFRAME_MASK,
> + HDMI_IFRAME_SLOT_AUDIO);
> + hdmi_write(hdmi, val, HDMI_SW_DI_CFG);
> }
>
> - hdmi_infoframe_write_infopack(hdmi, buffer, ret);
> -
> return 0;
> }
>
> @@ -656,6 +693,10 @@ static int hdmi_dbg_show(struct seq_file *s, void *data)
> DBGFS_DUMP("", HDMI_SW_DI_CFG);
> hdmi_dbg_sw_di_cfg(s, hdmi_read(hdmi, HDMI_SW_DI_CFG));
>
> + DBGFS_DUMP("\n", HDMI_AUDIO_CFG);
> + DBGFS_DUMP("\n", HDMI_SPDIF_FIFO_STATUS);
> + DBGFS_DUMP("\n", HDMI_AUDN);
> +
> seq_printf(s, "\n AVI Infoframe (Data Island slot N=%d):",
> HDMI_IFRAME_SLOT_AVI);
> DBGFS_DUMP_DI(HDMI_SW_DI_N_HEAD_WORD, HDMI_IFRAME_SLOT_AVI);
> @@ -861,6 +902,7 @@ static int sti_hdmi_connector_get_modes(struct drm_connector *connector)
>
> count = drm_add_edid_modes(connector, edid);
> drm_mode_connector_update_edid_property(connector, edid);
> + drm_edid_to_eld(connector, edid);
>
> kfree(edid);
> return count;
> @@ -1049,6 +1091,206 @@ static struct drm_encoder *sti_hdmi_find_encoder(struct drm_device *dev)
> return NULL;
> }
>
> +/**
> + * sti_hdmi_audio_get_non_coherent_n() - get N parameter for non-coherent
> + * clocks. None-coherent clocks means that audio and TMDS clocks have not the
> + * same source (drifts between clocks). In this case assumption is that CTS is
> + * automatically calculated by hardware.
> + *
> + * @audio_fs: audio frame clock frequency in Hz
> + *
> + * Values computed are based on table described in HDMI specification 1.4b
> + *
> + * Returns n value.
> + */
> +static int sti_hdmi_audio_get_non_coherent_n(unsigned int audio_fs)
> +{
> + unsigned int n;
> +
> + switch (audio_fs) {
> + case 32000:
> + n = 4096;
> + break;
> + case 44100:
> + n = 6272;
> + break;
> + case 48000:
> + n = 6144;
> + break;
> + case 88200:
> + n = 6272 * 2;
> + break;
> + case 96000:
> + n = 6144 * 2;
> + break;
> + case 176400:
> + n = 6272 * 4;
> + break;
> + case 192000:
> + n = 6144 * 4;
> + break;
> + default:
> + /* Not pre-defined, recommended value: 128 * fs / 1000 */
> + n = (audio_fs * 128) / 1000;
> + }
> +
> + return n;
> +}
> +
> +static int hdmi_audio_configure(struct sti_hdmi *hdmi,
> + struct hdmi_audio_params *params)
> +{
> + int audio_cfg, n;
> + struct hdmi_audio_infoframe *info = ¶ms->cea;
> +
> + DRM_DEBUG_DRIVER("\n");
> +
> + if (!hdmi->enabled)
> + return 0;
> +
> + /* update N parameter */
> + n = sti_hdmi_audio_get_non_coherent_n(params->sample_rate);
> +
> + DRM_DEBUG_DRIVER("Audio rate = %d Hz, TMDS clock = %d Hz, n = %d\n",
> + params->sample_rate, hdmi->mode.clock * 1000, n);
> + hdmi_write(hdmi, n, HDMI_AUDN);
> +
> + /* update HDMI registers according to configuration */
> + audio_cfg = HDMI_AUD_CFG_SPDIF_DIV_2 | HDMI_AUD_CFG_DTS_INVALID |
> + HDMI_AUD_CFG_ONE_BIT_INVALID;
> +
> + switch (info->channels) {
> + case 8:
> + audio_cfg |= HDMI_AUD_CFG_CH78_VALID;
> + case 6:
> + audio_cfg |= HDMI_AUD_CFG_CH56_VALID;
> + case 4:
> + audio_cfg |= HDMI_AUD_CFG_CH34_VALID | HDMI_AUD_CFG_8CH;
> + case 2:
> + audio_cfg |= HDMI_AUD_CFG_CH12_VALID;
> + break;
> + default:
> + DRM_ERROR("ERROR: Unsupported number of channels (%d)!\n",
> + info->channels);
> + return -EINVAL;
> + }
> +
> + hdmi_write(hdmi, audio_cfg, HDMI_AUDIO_CFG);
> +
> + hdmi->audio = *params;
> +
> + return hdmi_audio_infoframe_config(hdmi);
> +}
> +
> +static void hdmi_audio_shutdown(struct device *dev)
> +{
> + struct sti_hdmi *hdmi = dev_get_drvdata(dev);
> + int audio_cfg;
> +
> + DRM_DEBUG_DRIVER("\n");
> +
> + /* disable audio */
> + audio_cfg = HDMI_AUD_CFG_SPDIF_DIV_2 | HDMI_AUD_CFG_DTS_INVALID |
> + HDMI_AUD_CFG_ONE_BIT_INVALID;
> + hdmi_write(hdmi, audio_cfg, HDMI_AUDIO_CFG);
> +
> + hdmi->audio.enabled = 0;
> + hdmi_audio_infoframe_config(hdmi);
> +}
> +
> +static int hdmi_audio_hw_params(struct device *dev,
> + struct hdmi_codec_daifmt *daifmt,
> + struct hdmi_codec_params *params)
> +{
> + struct sti_hdmi *hdmi = dev_get_drvdata(dev);
> + int ret;
> + struct hdmi_audio_params audio = {
> + .sample_width = params->sample_width,
> + .sample_rate = params->sample_rate,
> + .cea = params->cea,
> + };
> +
> + DRM_DEBUG_DRIVER("\n");
> +
> + if (!hdmi->enabled)
> + return 0;
> +
> + 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;
> + }
> +
> + audio.enabled = 1;
> +
> + ret = hdmi_audio_configure(hdmi, &audio);
> + if (ret < 0)
> + return ret;
> +
> + return 0;
> +}
> +
> +static int hdmi_audio_digital_mute(struct device *dev, bool enable)
> +{
> + struct sti_hdmi *hdmi = dev_get_drvdata(dev);
> +
> + DRM_DEBUG_DRIVER("%s\n", enable ? "enable" : "disable");
> +
> + if (enable)
> + hdmi_write(hdmi, HDMI_SAMPLE_FLAT_ALL, HDMI_SAMPLE_FLAT_MASK);
> + else
> + hdmi_write(hdmi, HDMI_SAMPLE_FLAT_NO, HDMI_SAMPLE_FLAT_MASK);
> +
> + return 0;
> +}
> +
> +static int hdmi_audio_get_eld(struct device *dev, uint8_t *buf, size_t len)
> +{
> + struct sti_hdmi *hdmi = dev_get_drvdata(dev);
> + struct drm_connector *connector = hdmi->drm_connector;
> +
> + DRM_DEBUG_DRIVER("\n");
> + 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 sti_hdmi_register_audio_driver(struct device *dev,
> + struct sti_hdmi *hdmi)
> +{
> + struct hdmi_codec_pdata codec_data = {
> + .ops = &audio_codec_ops,
> + .max_i2s_channels = 8,
> + .i2s = 1,
> + };
> +
> + DRM_DEBUG_DRIVER("\n");
> +
> + hdmi->audio.enabled = 0;
> +
> + hdmi->audio_pdev = platform_device_register_data(
> + dev, HDMI_CODEC_DRV_NAME, PLATFORM_DEVID_AUTO,
> + &codec_data, sizeof(codec_data));
> +
> + if (IS_ERR(hdmi->audio_pdev))
> + return PTR_ERR(hdmi->audio_pdev);
> +
> + DRM_INFO("%s Driver bound %s\n", HDMI_CODEC_DRV_NAME, dev_name(dev));
> +
> + return 0;
> +}
> +
> static int sti_hdmi_bind(struct device *dev, struct device *master, void *data)
> {
> struct sti_hdmi *hdmi = dev_get_drvdata(dev);
> @@ -1099,12 +1341,27 @@ static int sti_hdmi_bind(struct device *dev, struct device *master, void *data)
> if (err)
> goto err_connector;
>
> + hdmi->drm_connector = drm_connector;
> +
> err = drm_mode_connector_attach_encoder(drm_connector, encoder);
> if (err) {
> DRM_ERROR("Failed to attach a connector to a encoder\n");
> goto err_sysfs;
> }
>
> + err = sti_hdmi_register_audio_driver(dev, hdmi);
> + if (err) {
> + DRM_ERROR("Failed to attach an audio codec\n");
> + goto err_sysfs;
> + }
> +
> + /* Initialize audio infoframe */
> + err = hdmi_audio_infoframe_init(&hdmi->audio.cea);
> + if (err) {
> + DRM_ERROR("Failed to init audio infoframe\n");
> + goto err_sysfs;
> + }
> +
> /* Enable default interrupts */
> hdmi_write(hdmi, HDMI_DEFAULT_INT, HDMI_INT_EN);
>
> @@ -1115,6 +1372,7 @@ static int sti_hdmi_bind(struct device *dev, struct device *master, void *data)
>
> err_sysfs:
> drm_connector_unregister(drm_connector);
> + hdmi->drm_connector = NULL;
> err_connector:
> drm_connector_cleanup(drm_connector);
>
> @@ -1267,6 +1525,8 @@ static int sti_hdmi_remove(struct platform_device *pdev)
> struct sti_hdmi *hdmi = dev_get_drvdata(&pdev->dev);
>
> i2c_put_adapter(hdmi->ddc_adapt);
> + if (hdmi->audio_pdev)
> + platform_device_unregister(hdmi->audio_pdev);
> component_del(&pdev->dev, &sti_hdmi_ops);
>
> return 0;
> diff --git a/drivers/gpu/drm/sti/sti_hdmi.h b/drivers/gpu/drm/sti/sti_hdmi.h
> index ef3a945..119bc35 100644
> --- a/drivers/gpu/drm/sti/sti_hdmi.h
> +++ b/drivers/gpu/drm/sti/sti_hdmi.h
> @@ -23,6 +23,13 @@ struct hdmi_phy_ops {
> void (*stop)(struct sti_hdmi *hdmi);
> };
>
> +struct hdmi_audio_params {
> + bool enabled;
> + unsigned int sample_width;
> + unsigned int sample_rate;
> + struct hdmi_audio_infoframe cea;
> +};
> +
> /* values for the framing mode property */
> enum sti_hdmi_modes {
> HDMI_MODE_HDMI,
> @@ -67,6 +74,9 @@ static const struct drm_prop_enum_list colorspace_mode_names[] = {
> * @ddc_adapt: i2c ddc adapter
> * @colorspace: current colorspace selected
> * @hdmi_mode: select framing for HDMI or DVI
> + * @audio_pdev: ASoC hdmi-codec platform device
> + * @audio: hdmi audio parameters.
> + * @drm_connector: hdmi connector
> */
> struct sti_hdmi {
> struct device dev;
> @@ -89,6 +99,9 @@ struct sti_hdmi {
> struct i2c_adapter *ddc_adapt;
> enum hdmi_colorspace colorspace;
> enum sti_hdmi_modes hdmi_mode;
> + struct platform_device *audio_pdev;
> + struct hdmi_audio_params audio;
> + struct drm_connector *drm_connector;
> };
>
> u32 hdmi_read(struct sti_hdmi *hdmi, int offset);
> --
> 1.9.1
>
--
Benjamin Gaignard
Graphic Working Group
Linaro.org │ Open source software for ARM SoCs
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