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drm: sti: Add ASoC generic hdmi codec support.

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Add the interface needed by audio hdmi-codec driver.

Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen@st.com>
This commit is contained in:
Arnaud Pouliquen 2016-05-30 15:31:37 +02:00 committed by Benjamin Gaignard
parent 4d7037708a
commit 2c348e5053
3 changed files with 290 additions and 16 deletions
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1
drivers/gpu/drm/sti/Kconfig
View File

@ -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

292
drivers/gpu/drm/sti/sti_hdmi.c
View File

@ -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;
int ret, val;
ret = hdmi_audio_infoframe_init(&infofame);
if (ret < 0) {
DRM_ERROR("failed to setup audio infoframe: %d\n", ret);
return ret;
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);
}
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;
}
hdmi_infoframe_write_infopack(hdmi, buffer, ret);
return 0;
}
@ -650,6 +687,10 @@ 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);
@ -854,6 +895,7 @@ 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;
@ -1036,6 +1078,206 @@ 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 = &params->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);
@ -1082,12 +1324,27 @@ static int sti_hdmi_bind(struct device *dev, struct device *master, void *data)
/* initialise property */
sti_hdmi_connector_init_property(drm_dev, drm_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);
@ -1095,6 +1352,7 @@ static int sti_hdmi_bind(struct device *dev, struct device *master, void *data)
err_sysfs:
drm_bridge_remove(bridge);
hdmi->drm_connector = NULL;
return -EINVAL;
}
@ -1244,6 +1502,8 @@ 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;

13
drivers/gpu/drm/sti/sti_hdmi.h
View File

@ -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);