// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright (c) 2016-2020, The Linux Foundation. All rights reserved.
*/
#define pr_fmt(fmt) "[drm-dp] %s: " fmt, __func__
#include <linux/platform_device.h>
#include <drm/display/drm_dp_helper.h>
#include <drm/drm_edid.h>
#include "dp_catalog.h"
#include "dp_audio.h"
#include "dp_panel.h"
#include "dp_display.h"
#include "dp_utils.h"
struct dp_audio_private {
struct platform_device *audio_pdev;
struct platform_device *pdev;
struct drm_device *drm_dev;
struct dp_catalog *catalog;
u32 channels;
struct dp_audio dp_audio;
};
static u32 dp_audio_get_header(struct dp_catalog *catalog,
enum dp_catalog_audio_sdp_type sdp,
enum dp_catalog_audio_header_type header)
{
return dp_catalog_audio_get_header(catalog, sdp, header);
}
static void dp_audio_set_header(struct dp_catalog *catalog,
u32 data,
enum dp_catalog_audio_sdp_type sdp,
enum dp_catalog_audio_header_type header)
{
dp_catalog_audio_set_header(catalog, sdp, header, data);
}
static void dp_audio_stream_sdp(struct dp_audio_private *audio)
{
struct dp_catalog *catalog = audio->catalog;
u32 value, new_value;
u8 parity_byte;
/* Config header and parity byte 1 */
value = dp_audio_get_header(catalog,
DP_AUDIO_SDP_STREAM, DP_AUDIO_SDP_HEADER_1);
new_value = 0x02;
parity_byte = dp_utils_calculate_parity(new_value);
value |= ((new_value << HEADER_BYTE_1_BIT)
| (parity_byte << PARITY_BYTE_1_BIT));
drm_dbg_dp(audio->drm_dev,
"Header Byte 1: value = 0x%x, parity_byte = 0x%x\n",
value, parity_byte);
dp_audio_set_header(catalog, value,
DP_AUDIO_SDP_STREAM, DP_AUDIO_SDP_HEADER_1);
/* Config header and parity byte 2 */
value = dp_audio_get_header(catalog,
DP_AUDIO_SDP_STREAM, DP_AUDIO_SDP_HEADER_2);
new_value = value;
parity_byte = dp_utils_calculate_parity(new_value);
value |= ((new_value << HEADER_BYTE_2_BIT)
| (parity_byte << PARITY_BYTE_2_BIT));
drm_dbg_dp(audio->drm_dev,
"Header Byte 2: value = 0x%x, parity_byte = 0x%x\n",
value, parity_byte);
dp_audio_set_header(catalog, value,
DP_AUDIO_SDP_STREAM, DP_AUDIO_SDP_HEADER_2);
/* Config header and parity byte 3 */
value = dp_audio_get_header(catalog,
DP_AUDIO_SDP_STREAM, DP_AUDIO_SDP_HEADER_3);
new_value = audio->channels - 1;
parity_byte = dp_utils_calculate_parity(new_value);
value |= ((new_value << HEADER_BYTE_3_BIT)
| (parity_byte << PARITY_BYTE_3_BIT));
drm_dbg_dp(audio->drm_dev,
"Header Byte 3: value = 0x%x, parity_byte = 0x%x\n",
value, parity_byte);
dp_audio_set_header(catalog, value,
DP_AUDIO_SDP_STREAM, DP_AUDIO_SDP_HEADER_3);
}
static void dp_audio_timestamp_sdp(struct dp_audio_private *audio)
{
struct dp_catalog *catalog = audio->catalog;
u32 value, new_value;
u8 parity_byte;
/* Config header and parity byte 1 */
value = dp_audio_get_header(catalog,
DP_AUDIO_SDP_TIMESTAMP, DP_AUDIO_SDP_HEADER_1);
new_value = 0x1;
parity_byte = dp_utils_calculate_parity(new_value);
value |= ((new_value << HEADER_BYTE_1_BIT)
| (parity_byte << PARITY_BYTE_1_BIT));
drm_dbg_dp(audio->drm_dev,
"Header Byte 1: value = 0x%x, parity_byte = 0x%x\n",
value, parity_byte);
dp_audio_set_header(catalog, value,
DP_AUDIO_SDP_TIMESTAMP, DP_AUDIO_SDP_HEADER_1);
/* Config header and parity byte 2 */
value = dp_audio_get_header(catalog,
DP_AUDIO_SDP_TIMESTAMP, DP_AUDIO_SDP_HEADER_2);
new_value = 0x17;
parity_byte = dp_utils_calculate_parity(new_value);
value |= ((new_value << HEADER_BYTE_2_BIT)
| (parity_byte << PARITY_BYTE_2_BIT));
drm_dbg_dp(audio->drm_dev,
"Header Byte 2: value = 0x%x, parity_byte = 0x%x\n",
value, parity_byte);
dp_audio_set_header(catalog, value,
DP_AUDIO_SDP_TIMESTAMP, DP_AUDIO_SDP_HEADER_2);
/* Config header and parity byte 3 */
value = dp_audio_get_header(catalog,
DP_AUDIO_SDP_TIMESTAMP, DP_AUDIO_SDP_HEADER_3);
new_value = (0x0 | (0x11 << 2));
parity_byte = dp_utils_calculate_parity(new_value);
value |= ((new_value << HEADER_BYTE_3_BIT)
| (parity_byte << PARITY_BYTE_3_BIT));
drm_dbg_dp(audio->drm_dev,
"Header Byte 3: value = 0x%x, parity_byte = 0x%x\n",
value, parity_byte);
dp_audio_set_header(catalog, value,
DP_AUDIO_SDP_TIMESTAMP, DP_AUDIO_SDP_HEADER_3);
}
static void dp_audio_infoframe_sdp(struct dp_audio_private *audio)
{
struct dp_catalog *catalog = audio->catalog;
u32 value, new_value;
u8 parity_byte;
/* Config header and parity byte 1 */
value = dp_audio_get_header(catalog,
DP_AUDIO_SDP_INFOFRAME, DP_AUDIO_SDP_HEADER_1);
new_value = 0x84;
parity_byte = dp_utils_calculate_parity(new_value);
value |= ((new_value << HEADER_BYTE_1_BIT)
| (parity_byte << PARITY_BYTE_1_BIT));
drm_dbg_dp(audio->drm_dev,
"Header Byte 1: value = 0x%x, parity_byte = 0x%x\n",
value, parity_byte);
dp_audio_set_header(catalog, value,
DP_AUDIO_SDP_INFOFRAME, DP_AUDIO_SDP_HEADER_1);
/* Config header and parity byte 2 */
value = dp_audio_get_header(catalog,
DP_AUDIO_SDP_INFOFRAME, DP_AUDIO_SDP_HEADER_2);
new_value = 0x1b;
parity_byte = dp_utils_calculate_parity(new_value);
value |= ((new_value << HEADER_BYTE_2_BIT)
| (parity_byte << PARITY_BYTE_2_BIT));
drm_dbg_dp(audio->drm_dev,
"Header Byte 2: value = 0x%x, parity_byte = 0x%x\n",
value, parity_byte);
dp_audio_set_header(catalog, value,
DP_AUDIO_SDP_INFOFRAME, DP_AUDIO_SDP_HEADER_2);
/* Config header and parity byte 3 */
value = dp_audio_get_header(catalog,
DP_AUDIO_SDP_INFOFRAME, DP_AUDIO_SDP_HEADER_3);
new_value = (0x0 | (0x11 << 2));
parity_byte = dp_utils_calculate_parity(new_value);
value |= ((new_value << HEADER_BYTE_3_BIT)
| (parity_byte << PARITY_BYTE_3_BIT));
drm_dbg_dp(audio->drm_dev,
"Header Byte 3: value = 0x%x, parity_byte = 0x%x\n",
new_value, parity_byte);
dp_audio_set_header(catalog, value,
DP_AUDIO_SDP_INFOFRAME, DP_AUDIO_SDP_HEADER_3);
}
static void dp_audio_copy_management_sdp(struct dp_audio_private *audio)
{
struct dp_catalog *catalog = audio->catalog;
u32 value, new_value;
u8 parity_byte;
/* Config header and parity byte 1 */
value = dp_audio_get_header(catalog,
DP_AUDIO_SDP_COPYMANAGEMENT, DP_AUDIO_SDP_HEADER_1);
new_value = 0x05;
parity_byte = dp_utils_calculate_parity(new_value);
value |= ((new_value << HEADER_BYTE_1_BIT)
| (parity_byte << PARITY_BYTE_1_BIT));
drm_dbg_dp(audio->drm_dev,
"Header Byte 1: value = 0x%x, parity_byte = 0x%x\n",
value, parity_byte);
dp_audio_set_header(catalog, value,
DP_AUDIO_SDP_COPYMANAGEMENT, DP_AUDIO_SDP_HEADER_1);
/* Config header and parity byte 2 */
value = dp_audio_get_header(catalog,
DP_AUDIO_SDP_COPYMANAGEMENT, DP_AUDIO_SDP_HEADER_2);
new_value = 0x0F;
parity_byte = dp_utils_calculate_parity(new_value);
value |= ((new_value << HEADER_BYTE_2_BIT)
| (parity_byte << PARITY_BYTE_2_BIT));
drm_dbg_dp(audio->drm_dev,
"Header Byte 2: value = 0x%x, parity_byte = 0x%x\n",
value, parity_byte);
dp_audio_set_header(catalog, value,
DP_AUDIO_SDP_COPYMANAGEMENT, DP_AUDIO_SDP_HEADER_2);
/* Config header and parity byte 3 */
value = dp_audio_get_header(catalog,
DP_AUDIO_SDP_COPYMANAGEMENT, DP_AUDIO_SDP_HEADER_3);
new_value = 0x0;
parity_byte = dp_utils_calculate_parity(new_value);
value |= ((new_value << HEADER_BYTE_3_BIT)
| (parity_byte << PARITY_BYTE_3_BIT));
drm_dbg_dp(audio->drm_dev,
"Header Byte 3: value = 0x%x, parity_byte = 0x%x\n",
value, parity_byte);
dp_audio_set_header(catalog, value,
DP_AUDIO_SDP_COPYMANAGEMENT, DP_AUDIO_SDP_HEADER_3);
}
static void dp_audio_isrc_sdp(struct dp_audio_private *audio)
{
struct dp_catalog *catalog = audio->catalog;
u32 value, new_value;
u8 parity_byte;
/* Config header and parity byte 1 */
value = dp_audio_get_header(catalog,
DP_AUDIO_SDP_ISRC, DP_AUDIO_SDP_HEADER_1);
new_value = 0x06;
parity_byte = dp_utils_calculate_parity(new_value);
value |= ((new_value << HEADER_BYTE_1_BIT)
| (parity_byte << PARITY_BYTE_1_BIT));
drm_dbg_dp(audio->drm_dev,
"Header Byte 1: value = 0x%x, parity_byte = 0x%x\n",
value, parity_byte);
dp_audio_set_header(catalog, value,
DP_AUDIO_SDP_ISRC, DP_AUDIO_SDP_HEADER_1);
/* Config header and parity byte 2 */
value = dp_audio_get_header(catalog,
DP_AUDIO_SDP_ISRC, DP_AUDIO_SDP_HEADER_2);
new_value = 0x0F;
parity_byte = dp_utils_calculate_parity(new_value);
value |= ((new_value << HEADER_BYTE_2_BIT)
| (parity_byte << PARITY_BYTE_2_BIT));
drm_dbg_dp(audio->drm_dev,
"Header Byte 2: value = 0x%x, parity_byte = 0x%x\n",
value, parity_byte);
dp_audio_set_header(catalog, value,
DP_AUDIO_SDP_ISRC, DP_AUDIO_SDP_HEADER_2);
}
static void dp_audio_setup_sdp(struct dp_audio_private *audio)
{
dp_catalog_audio_config_sdp(audio->catalog);
dp_audio_stream_sdp(audio);
dp_audio_timestamp_sdp(audio);
dp_audio_infoframe_sdp(audio);
dp_audio_copy_management_sdp(audio);
dp_audio_isrc_sdp(audio);
}
static void dp_audio_setup_acr(struct dp_audio_private *audio)
{
u32 select = 0;
struct dp_catalog *catalog = audio->catalog;
switch (audio->dp_audio.bw_code) {
case DP_LINK_BW_1_62:
select = 0;
break;
case DP_LINK_BW_2_7:
select = 1;
break;
case DP_LINK_BW_5_4:
select = 2;
break;
case DP_LINK_BW_8_1:
select = 3;
break;
default:
drm_dbg_dp(audio->drm_dev, "Unknown link rate\n");
select = 0;
break;
}
dp_catalog_audio_config_acr(catalog, select);
}
static void dp_audio_safe_to_exit_level(struct dp_audio_private *audio)
{
struct dp_catalog *catalog = audio->catalog;
u32 safe_to_exit_level = 0;
switch (audio->dp_audio.lane_count) {
case 1:
safe_to_exit_level = 14;
break;
case 2:
safe_to_exit_level = 8;
break;
case 4:
safe_to_exit_level = 5;
break;
default:
drm_dbg_dp(audio->drm_dev,
"setting the default safe_to_exit_level = %u\n",
safe_to_exit_level);
safe_to_exit_level = 14;
break;
}
dp_catalog_audio_sfe_level(catalog, safe_to_exit_level);
}
static void dp_audio_enable(struct dp_audio_private *audio, bool enable)
{
struct dp_catalog *catalog = audio->catalog;
dp_catalog_audio_enable(catalog, enable);
}
static struct dp_audio_private *dp_audio_get_data(struct platform_device *pdev)
{
struct dp_audio *dp_audio;
struct msm_dp *dp_display;
if (!pdev) {
DRM_ERROR("invalid input\n");
return ERR_PTR(-ENODEV);
}
dp_display = platform_get_drvdata(pdev);
if (!dp_display) {
DRM_ERROR("invalid input\n");
return ERR_PTR(-ENODEV);
}
dp_audio = dp_display->dp_audio;
if (!dp_audio) {
DRM_ERROR("invalid dp_audio data\n");
return ERR_PTR(-EINVAL);
}
return container_of(dp_audio, struct dp_audio_private, dp_audio);
}
static int dp_audio_hook_plugged_cb(struct device *dev, void *data,
hdmi_codec_plugged_cb fn,
struct device *codec_dev)
{
struct platform_device *pdev;
struct msm_dp *dp_display;
pdev = to_platform_device(dev);
if (!pdev) {
pr_err("invalid input\n");
return -ENODEV;
}
dp_display = platform_get_drvdata(pdev);
if (!dp_display) {
pr_err("invalid input\n");
return -ENODEV;
}
return dp_display_set_plugged_cb(dp_display, fn, codec_dev);
}
static int dp_audio_get_eld(struct device *dev,
void *data, uint8_t *buf, size_t len)
{
struct platform_device *pdev;
struct msm_dp *dp_display;
pdev = to_platform_device(dev);
if (!pdev) {
DRM_ERROR("invalid input\n");
return -ENODEV;
}
dp_display = platform_get_drvdata(pdev);
if (!dp_display) {
DRM_ERROR("invalid input\n");
return -ENODEV;
}
memcpy(buf, dp_display->connector->eld,
min(sizeof(dp_display->connector->eld), len));
return 0;
}
int dp_audio_hw_params(struct device *dev,
void *data,
struct hdmi_codec_daifmt *daifmt,
struct hdmi_codec_params *params)
{
int rc = 0;
struct dp_audio_private *audio;
struct platform_device *pdev;
struct msm_dp *dp_display;
pdev = to_platform_device(dev);
dp_display = platform_get_drvdata(pdev);
/*
* there could be cases where sound card can be opened even
* before OR even when DP is not connected . This can cause
* unclocked access as the audio subsystem relies on the DP
* driver to maintain the correct state of clocks. To protect
* such cases check for connection status and bail out if not
* connected.
*/
if (!dp_display->power_on) {
rc = -EINVAL;
goto end;
}
audio = dp_audio_get_data(pdev);
if (IS_ERR(audio)) {
rc = PTR_ERR(audio);
goto end;
}
audio->channels = params->channels;
dp_audio_setup_sdp(audio);
dp_audio_setup_acr(audio);
dp_audio_safe_to_exit_level(audio);
dp_audio_enable(audio, true);
dp_display_signal_audio_start(dp_display);
dp_display->audio_enabled = true;
end:
return rc;
}
static void dp_audio_shutdown(struct device *dev, void *data)
{
struct dp_audio_private *audio;
struct platform_device *pdev;
struct msm_dp *dp_display;
pdev = to_platform_device(dev);
dp_display = platform_get_drvdata(pdev);
audio = dp_audio_get_data(pdev);
if (IS_ERR(audio)) {
DRM_ERROR("failed to get audio data\n");
return;
}
/*
* if audio was not enabled there is no need
* to execute the shutdown and we can bail out early.
* This also makes sure that we dont cause an unclocked
* access when audio subsystem calls this without DP being
* connected. is_connected cannot be used here as its set
* to false earlier than this call
*/
if (!dp_display->audio_enabled)
return;
dp_audio_enable(audio, false);
/* signal the dp display to safely shutdown clocks */
dp_display_signal_audio_complete(dp_display);
}
static const struct hdmi_codec_ops dp_audio_codec_ops = {
.hw_params = dp_audio_hw_params,
.audio_shutdown = dp_audio_shutdown,
.get_eld = dp_audio_get_eld,
.hook_plugged_cb = dp_audio_hook_plugged_cb,
};
static struct hdmi_codec_pdata codec_data = {
.ops = &dp_audio_codec_ops,
.max_i2s_channels = 8,
.i2s = 1,
};
void dp_unregister_audio_driver(struct device *dev, struct dp_audio *dp_audio)
{
struct dp_audio_private *audio_priv;
audio_priv = container_of(dp_audio, struct dp_audio_private, dp_audio);
if (audio_priv->audio_pdev) {
platform_device_unregister(audio_priv->audio_pdev);
audio_priv->audio_pdev = NULL;
}
}
int dp_register_audio_driver(struct device *dev,
struct dp_audio *dp_audio)
{
struct dp_audio_private *audio_priv;
audio_priv = container_of(dp_audio,
struct dp_audio_private, dp_audio);
audio_priv->audio_pdev = platform_device_register_data(dev,
HDMI_CODEC_DRV_NAME,
PLATFORM_DEVID_AUTO,
&codec_data,
sizeof(codec_data));
return PTR_ERR_OR_ZERO(audio_priv->audio_pdev);
}
struct dp_audio *dp_audio_get(struct platform_device *pdev,
struct dp_panel *panel,
struct dp_catalog *catalog)
{
int rc = 0;
struct dp_audio_private *audio;
struct dp_audio *dp_audio;
if (!pdev || !panel || !catalog) {
DRM_ERROR("invalid input\n");
rc = -EINVAL;
goto error;
}
audio = devm_kzalloc(&pdev->dev, sizeof(*audio), GFP_KERNEL);
if (!audio) {
rc = -ENOMEM;
goto error;
}
audio->pdev = pdev;
audio->catalog = catalog;
dp_audio = &audio->dp_audio;
dp_catalog_audio_init(catalog);
return dp_audio;
error:
return ERR_PTR(rc);
}
void dp_audio_put(struct dp_audio *dp_audio)
{
struct dp_audio_private *audio;
if (!dp_audio)
return;
audio = container_of(dp_audio, struct dp_audio_private, dp_audio);
devm_kfree(&audio->pdev->dev, audio);
}
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