668 lines
16 KiB
C
668 lines
16 KiB
C
|
// 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/of_platform.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"
|
||
|
|
|
||
|
|
#define HEADER_BYTE_2_BIT 0
|
||
|
|
#define PARITY_BYTE_2_BIT 8
|
||
|
|
#define HEADER_BYTE_1_BIT 16
|
||
|
|
#define PARITY_BYTE_1_BIT 24
|
||
|
|
#define HEADER_BYTE_3_BIT 16
|
||
|
|
#define PARITY_BYTE_3_BIT 24
|
||
|
|
|
||
|
|
struct dp_audio_private {
|
||
|
|
struct platform_device *audio_pdev;
|
||
|
|
struct platform_device *pdev;
|
||
|
|
struct drm_device *drm_dev;
|
||
|
|
struct dp_catalog *catalog;
|
||
|
|
struct dp_panel *panel;
|
||
|
|
|
||
|
|
bool engine_on;
|
||
|
|
u32 channels;
|
||
|
|
|
||
|
|
struct dp_audio dp_audio;
|
||
|
|
};
|
||
|
|
|
||
|
|
static u8 dp_audio_get_g0_value(u8 data)
|
||
|
|
{
|
||
|
|
u8 c[4];
|
||
|
|
u8 g[4];
|
||
|
|
u8 ret_data = 0;
|
||
|
|
u8 i;
|
||
|
|
|
||
|
|
for (i = 0; i < 4; i++)
|
||
|
|
c[i] = (data >> i) & 0x01;
|
||
|
|
|
||
|
|
g[0] = c[3];
|
||
|
|
g[1] = c[0] ^ c[3];
|
||
|
|
g[2] = c[1];
|
||
|
|
g[3] = c[2];
|
||
|
|
|
||
|
|
for (i = 0; i < 4; i++)
|
||
|
|
ret_data = ((g[i] & 0x01) << i) | ret_data;
|
||
|
|
|
||
|
|
return ret_data;
|
||
|
|
}
|
||
|
|
|
||
|
|
static u8 dp_audio_get_g1_value(u8 data)
|
||
|
|
{
|
||
|
|
u8 c[4];
|
||
|
|
u8 g[4];
|
||
|
|
u8 ret_data = 0;
|
||
|
|
u8 i;
|
||
|
|
|
||
|
|
for (i = 0; i < 4; i++)
|
||
|
|
c[i] = (data >> i) & 0x01;
|
||
|
|
|
||
|
|
g[0] = c[0] ^ c[3];
|
||
|
|
g[1] = c[0] ^ c[1] ^ c[3];
|
||
|
|
g[2] = c[1] ^ c[2];
|
||
|
|
g[3] = c[2] ^ c[3];
|
||
|
|
|
||
|
|
for (i = 0; i < 4; i++)
|
||
|
|
ret_data = ((g[i] & 0x01) << i) | ret_data;
|
||
|
|
|
||
|
|
return ret_data;
|
||
|
|
}
|
||
|
|
|
||
|
|
static u8 dp_audio_calculate_parity(u32 data)
|
||
|
|
{
|
||
|
|
u8 x0 = 0;
|
||
|
|
u8 x1 = 0;
|
||
|
|
u8 ci = 0;
|
||
|
|
u8 iData = 0;
|
||
|
|
u8 i = 0;
|
||
|
|
u8 parity_byte;
|
||
|
|
u8 num_byte = (data & 0xFF00) > 0 ? 8 : 2;
|
||
|
|
|
||
|
|
for (i = 0; i < num_byte; i++) {
|
||
|
|
iData = (data >> i*4) & 0xF;
|
||
|
|
|
||
|
|
ci = iData ^ x1;
|
||
|
|
x1 = x0 ^ dp_audio_get_g1_value(ci);
|
||
|
|
x0 = dp_audio_get_g0_value(ci);
|
||
|
|
}
|
||
|
|
|
||
|
|
parity_byte = x1 | (x0 << 4);
|
||
|
|
|
||
|
|
return parity_byte;
|
||
|
|
}
|
||
|
|
|
||
|
|
static u32 dp_audio_get_header(struct dp_catalog *catalog,
|
||
|
|
enum dp_catalog_audio_sdp_type sdp,
|
||
|
|
enum dp_catalog_audio_header_type header)
|
||
|
|
{
|
||
|
|
catalog->sdp_type = sdp;
|
||
|
|
catalog->sdp_header = header;
|
||
|
|
dp_catalog_audio_get_header(catalog);
|
||
|
|
|
||
|
|
return catalog->audio_data;
|
||
|
|
}
|
||
|
|
|
||
|
|
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)
|
||
|
|
{
|
||
|
|
catalog->sdp_type = sdp;
|
||
|
|
catalog->sdp_header = header;
|
||
|
|
catalog->audio_data = data;
|
||
|
|
dp_catalog_audio_set_header(catalog);
|
||
|
|
}
|
||
|
|
|
||
|
|
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_audio_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_audio_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_audio_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_audio_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_audio_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_audio_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_audio_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_audio_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_audio_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_audio_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_audio_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_audio_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_audio_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_audio_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;
|
||
|
|
}
|
||
|
|
|
||
|
|
catalog->audio_data = select;
|
||
|
|
dp_catalog_audio_config_acr(catalog);
|
||
|
|
}
|
||
|
|
|
||
|
|
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;
|
||
|
|
}
|
||
|
|
|
||
|
|
catalog->audio_data = safe_to_exit_level;
|
||
|
|
dp_catalog_audio_sfe_level(catalog);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void dp_audio_enable(struct dp_audio_private *audio, bool enable)
|
||
|
|
{
|
||
|
|
struct dp_catalog *catalog = audio->catalog;
|
||
|
|
|
||
|
|
catalog->audio_data = enable;
|
||
|
|
dp_catalog_audio_enable(catalog);
|
||
|
|
|
||
|
|
audio->engine_on = 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->panel = panel;
|
||
|
|
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);
|
||
|
|
}
|