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linuxdebug/drivers/gpu/drm/mediatek/mtk_dp.c

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null pointer error
2024-07-16 15:50:57 +02:00
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2019-2022 MediaTek Inc.
* Copyright (c) 2022 BayLibre
*/
#include <drm/display/drm_dp.h>
#include <drm/display/drm_dp_helper.h>
#include <drm/drm_atomic_helper.h>
#include <drm/drm_bridge.h>
#include <drm/drm_crtc.h>
#include <drm/drm_edid.h>
#include <drm/drm_of.h>
#include <drm/drm_panel.h>
#include <drm/drm_print.h>
#include <drm/drm_probe_helper.h>
#include <linux/arm-smccc.h>
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/media-bus-format.h>
#include <linux/nvmem-consumer.h>
#include <linux/of.h>
#include <linux/of_irq.h>
#include <linux/of_platform.h>
#include <linux/phy/phy.h>
#include <linux/platform_device.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/soc/mediatek/mtk_sip_svc.h>
#include <sound/hdmi-codec.h>
#include <video/videomode.h>
#include "mtk_dp_reg.h"
#define MTK_DP_SIP_CONTROL_AARCH32 MTK_SIP_SMC_CMD(0x523)
#define MTK_DP_SIP_ATF_EDP_VIDEO_UNMUTE (BIT(0) | BIT(5))
#define MTK_DP_SIP_ATF_VIDEO_UNMUTE BIT(5)
#define MTK_DP_THREAD_CABLE_STATE_CHG BIT(0)
#define MTK_DP_THREAD_HPD_EVENT BIT(1)
#define MTK_DP_4P1T 4
#define MTK_DP_HDE 2
#define MTK_DP_PIX_PER_ADDR 2
#define MTK_DP_AUX_WAIT_REPLY_COUNT 20
#define MTK_DP_TBC_BUF_READ_START_ADDR 0x8
#define MTK_DP_TRAIN_VOLTAGE_LEVEL_RETRY 5
#define MTK_DP_TRAIN_DOWNSCALE_RETRY 10
#define MTK_DP_VERSION 0x11
#define MTK_DP_SDP_AUI 0x4
enum {
MTK_DP_CAL_GLB_BIAS_TRIM = 0,
MTK_DP_CAL_CLKTX_IMPSE,
MTK_DP_CAL_LN_TX_IMPSEL_PMOS_0,
MTK_DP_CAL_LN_TX_IMPSEL_PMOS_1,
MTK_DP_CAL_LN_TX_IMPSEL_PMOS_2,
MTK_DP_CAL_LN_TX_IMPSEL_PMOS_3,
MTK_DP_CAL_LN_TX_IMPSEL_NMOS_0,
MTK_DP_CAL_LN_TX_IMPSEL_NMOS_1,
MTK_DP_CAL_LN_TX_IMPSEL_NMOS_2,
MTK_DP_CAL_LN_TX_IMPSEL_NMOS_3,
MTK_DP_CAL_MAX,
};
struct mtk_dp_train_info {
bool sink_ssc;
bool cable_plugged_in;
/* link_rate is in multiple of 0.27Gbps */
int link_rate;
int lane_count;
unsigned int channel_eq_pattern;
};
struct mtk_dp_audio_cfg {
bool detect_monitor;
int sad_count;
int sample_rate;
int word_length_bits;
int channels;
};
struct mtk_dp_info {
enum dp_pixelformat format;
struct videomode vm;
struct mtk_dp_audio_cfg audio_cur_cfg;
};
struct mtk_dp_efuse_fmt {
unsigned short idx;
unsigned short shift;
unsigned short mask;
unsigned short min_val;
unsigned short max_val;
unsigned short default_val;
};
struct mtk_dp {
bool enabled;
bool need_debounce;
u8 max_lanes;
u8 max_linkrate;
u8 rx_cap[DP_RECEIVER_CAP_SIZE];
u32 cal_data[MTK_DP_CAL_MAX];
u32 irq_thread_handle;
/* irq_thread_lock is used to protect irq_thread_handle */
spinlock_t irq_thread_lock;
struct device *dev;
struct drm_bridge bridge;
struct drm_bridge *next_bridge;
struct drm_connector *conn;
struct drm_device *drm_dev;
struct drm_dp_aux aux;
const struct mtk_dp_data *data;
struct mtk_dp_info info;
struct mtk_dp_train_info train_info;
struct platform_device *phy_dev;
struct phy *phy;
struct regmap *regs;
struct timer_list debounce_timer;
/* For audio */
bool audio_enable;
hdmi_codec_plugged_cb plugged_cb;
struct platform_device *audio_pdev;
struct device *codec_dev;
/* protect the plugged_cb as it's used in both bridge ops and audio */
struct mutex update_plugged_status_lock;
};
struct mtk_dp_data {
int bridge_type;
unsigned int smc_cmd;
const struct mtk_dp_efuse_fmt *efuse_fmt;
bool audio_supported;
};
static const struct mtk_dp_efuse_fmt mt8195_edp_efuse_fmt[MTK_DP_CAL_MAX] = {
[MTK_DP_CAL_GLB_BIAS_TRIM] = {
.idx = 3,
.shift = 27,
.mask = 0x1f,
.min_val = 1,
.max_val = 0x1e,
.default_val = 0xf,
},
[MTK_DP_CAL_CLKTX_IMPSE] = {
.idx = 0,
.shift = 9,
.mask = 0xf,
.min_val = 1,
.max_val = 0xe,
.default_val = 0x8,
},
[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_0] = {
.idx = 2,
.shift = 28,
.mask = 0xf,
.min_val = 1,
.max_val = 0xe,
.default_val = 0x8,
},
[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_1] = {
.idx = 2,
.shift = 20,
.mask = 0xf,
.min_val = 1,
.max_val = 0xe,
.default_val = 0x8,
},
[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_2] = {
.idx = 2,
.shift = 12,
.mask = 0xf,
.min_val = 1,
.max_val = 0xe,
.default_val = 0x8,
},
[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_3] = {
.idx = 2,
.shift = 4,
.mask = 0xf,
.min_val = 1,
.max_val = 0xe,
.default_val = 0x8,
},
[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_0] = {
.idx = 2,
.shift = 24,
.mask = 0xf,
.min_val = 1,
.max_val = 0xe,
.default_val = 0x8,
},
[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_1] = {
.idx = 2,
.shift = 16,
.mask = 0xf,
.min_val = 1,
.max_val = 0xe,
.default_val = 0x8,
},
[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_2] = {
.idx = 2,
.shift = 8,
.mask = 0xf,
.min_val = 1,
.max_val = 0xe,
.default_val = 0x8,
},
[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_3] = {
.idx = 2,
.shift = 0,
.mask = 0xf,
.min_val = 1,
.max_val = 0xe,
.default_val = 0x8,
},
};
static const struct mtk_dp_efuse_fmt mt8195_dp_efuse_fmt[MTK_DP_CAL_MAX] = {
[MTK_DP_CAL_GLB_BIAS_TRIM] = {
.idx = 0,
.shift = 27,
.mask = 0x1f,
.min_val = 1,
.max_val = 0x1e,
.default_val = 0xf,
},
[MTK_DP_CAL_CLKTX_IMPSE] = {
.idx = 0,
.shift = 13,
.mask = 0xf,
.min_val = 1,
.max_val = 0xe,
.default_val = 0x8,
},
[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_0] = {
.idx = 1,
.shift = 28,
.mask = 0xf,
.min_val = 1,
.max_val = 0xe,
.default_val = 0x8,
},
[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_1] = {
.idx = 1,
.shift = 20,
.mask = 0xf,
.min_val = 1,
.max_val = 0xe,
.default_val = 0x8,
},
[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_2] = {
.idx = 1,
.shift = 12,
.mask = 0xf,
.min_val = 1,
.max_val = 0xe,
.default_val = 0x8,
},
[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_3] = {
.idx = 1,
.shift = 4,
.mask = 0xf,
.min_val = 1,
.max_val = 0xe,
.default_val = 0x8,
},
[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_0] = {
.idx = 1,
.shift = 24,
.mask = 0xf,
.min_val = 1,
.max_val = 0xe,
.default_val = 0x8,
},
[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_1] = {
.idx = 1,
.shift = 16,
.mask = 0xf,
.min_val = 1,
.max_val = 0xe,
.default_val = 0x8,
},
[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_2] = {
.idx = 1,
.shift = 8,
.mask = 0xf,
.min_val = 1,
.max_val = 0xe,
.default_val = 0x8,
},
[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_3] = {
.idx = 1,
.shift = 0,
.mask = 0xf,
.min_val = 1,
.max_val = 0xe,
.default_val = 0x8,
},
};
static struct regmap_config mtk_dp_regmap_config = {
.reg_bits = 32,
.val_bits = 32,
.reg_stride = 4,
.max_register = SEC_OFFSET + 0x90,
.name = "mtk-dp-registers",
};
static struct mtk_dp *mtk_dp_from_bridge(struct drm_bridge *b)
{
return container_of(b, struct mtk_dp, bridge);
}
static u32 mtk_dp_read(struct mtk_dp *mtk_dp, u32 offset)
{
u32 read_val;
int ret;
ret = regmap_read(mtk_dp->regs, offset, &read_val);
if (ret) {
dev_err(mtk_dp->dev, "Failed to read register 0x%x: %d\n",
offset, ret);
return 0;
}
return read_val;
}
static int mtk_dp_write(struct mtk_dp *mtk_dp, u32 offset, u32 val)
{
int ret = regmap_write(mtk_dp->regs, offset, val);
if (ret)
dev_err(mtk_dp->dev,
"Failed to write register 0x%x with value 0x%x\n",
offset, val);
return ret;
}
static int mtk_dp_update_bits(struct mtk_dp *mtk_dp, u32 offset,
u32 val, u32 mask)
{
int ret = regmap_update_bits(mtk_dp->regs, offset, mask, val);
if (ret)
dev_err(mtk_dp->dev,
"Failed to update register 0x%x with value 0x%x, mask 0x%x\n",
offset, val, mask);
return ret;
}
static void mtk_dp_bulk_16bit_write(struct mtk_dp *mtk_dp, u32 offset, u8 *buf,
size_t length)
{
int i;
/* 2 bytes per register */
for (i = 0; i < length; i += 2) {
u32 val = buf[i] | (i + 1 < length ? buf[i + 1] << 8 : 0);
if (mtk_dp_write(mtk_dp, offset + i * 2, val))
return;
}
}
static void mtk_dp_msa_bypass_enable(struct mtk_dp *mtk_dp, bool enable)
{
u32 mask = HTOTAL_SEL_DP_ENC0_P0 | VTOTAL_SEL_DP_ENC0_P0 |
HSTART_SEL_DP_ENC0_P0 | VSTART_SEL_DP_ENC0_P0 |
HWIDTH_SEL_DP_ENC0_P0 | VHEIGHT_SEL_DP_ENC0_P0 |
HSP_SEL_DP_ENC0_P0 | HSW_SEL_DP_ENC0_P0 |
VSP_SEL_DP_ENC0_P0 | VSW_SEL_DP_ENC0_P0;
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3030, enable ? 0 : mask, mask);
}
static void mtk_dp_set_msa(struct mtk_dp *mtk_dp)
{
struct drm_display_mode mode;
struct videomode *vm = &mtk_dp->info.vm;
drm_display_mode_from_videomode(vm, &mode);
/* horizontal */
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3010,
mode.htotal, HTOTAL_SW_DP_ENC0_P0_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3018,
vm->hsync_len + vm->hback_porch,
HSTART_SW_DP_ENC0_P0_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3028,
vm->hsync_len, HSW_SW_DP_ENC0_P0_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3028,
0, HSP_SW_DP_ENC0_P0_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3020,
vm->hactive, HWIDTH_SW_DP_ENC0_P0_MASK);
/* vertical */
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3014,
mode.vtotal, VTOTAL_SW_DP_ENC0_P0_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_301C,
vm->vsync_len + vm->vback_porch,
VSTART_SW_DP_ENC0_P0_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_302C,
vm->vsync_len, VSW_SW_DP_ENC0_P0_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_302C,
0, VSP_SW_DP_ENC0_P0_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3024,
vm->vactive, VHEIGHT_SW_DP_ENC0_P0_MASK);
/* horizontal */
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3064,
vm->hactive, HDE_NUM_LAST_DP_ENC0_P0_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3154,
mode.htotal, PGEN_HTOTAL_DP_ENC0_P0_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3158,
vm->hfront_porch,
PGEN_HSYNC_RISING_DP_ENC0_P0_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_315C,
vm->hsync_len,
PGEN_HSYNC_PULSE_WIDTH_DP_ENC0_P0_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3160,
vm->hback_porch + vm->hsync_len,
PGEN_HFDE_START_DP_ENC0_P0_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3164,
vm->hactive,
PGEN_HFDE_ACTIVE_WIDTH_DP_ENC0_P0_MASK);
/* vertical */
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3168,
mode.vtotal,
PGEN_VTOTAL_DP_ENC0_P0_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_316C,
vm->vfront_porch,
PGEN_VSYNC_RISING_DP_ENC0_P0_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3170,
vm->vsync_len,
PGEN_VSYNC_PULSE_WIDTH_DP_ENC0_P0_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3174,
vm->vback_porch + vm->vsync_len,
PGEN_VFDE_START_DP_ENC0_P0_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3178,
vm->vactive,
PGEN_VFDE_ACTIVE_WIDTH_DP_ENC0_P0_MASK);
}
static int mtk_dp_set_color_format(struct mtk_dp *mtk_dp,
enum dp_pixelformat color_format)
{
u32 val;
/* update MISC0 */
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3034,
color_format << DP_TEST_COLOR_FORMAT_SHIFT,
DP_TEST_COLOR_FORMAT_MASK);
switch (color_format) {
case DP_PIXELFORMAT_YUV422:
val = PIXEL_ENCODE_FORMAT_DP_ENC0_P0_YCBCR422;
break;
case DP_PIXELFORMAT_RGB:
val = PIXEL_ENCODE_FORMAT_DP_ENC0_P0_RGB;
break;
default:
drm_warn(mtk_dp->drm_dev, "Unsupported color format: %d\n",
color_format);
return -EINVAL;
}
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_303C,
val, PIXEL_ENCODE_FORMAT_DP_ENC0_P0_MASK);
return 0;
}
static void mtk_dp_set_color_depth(struct mtk_dp *mtk_dp)
{
/* Only support 8 bits currently */
/* Update MISC0 */
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3034,
DP_MSA_MISC_8_BPC, DP_TEST_BIT_DEPTH_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_303C,
VIDEO_COLOR_DEPTH_DP_ENC0_P0_8BIT,
VIDEO_COLOR_DEPTH_DP_ENC0_P0_MASK);
}
static void mtk_dp_config_mn_mode(struct mtk_dp *mtk_dp)
{
/* 0: hw mode, 1: sw mode */
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3004,
0, VIDEO_M_CODE_SEL_DP_ENC0_P0_MASK);
}
static void mtk_dp_set_sram_read_start(struct mtk_dp *mtk_dp, u32 val)
{
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_303C,
val, SRAM_START_READ_THRD_DP_ENC0_P0_MASK);
}
static void mtk_dp_setup_encoder(struct mtk_dp *mtk_dp)
{
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_303C,
VIDEO_MN_GEN_EN_DP_ENC0_P0,
VIDEO_MN_GEN_EN_DP_ENC0_P0);
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3040,
SDP_DOWN_CNT_DP_ENC0_P0_VAL,
SDP_DOWN_CNT_INIT_DP_ENC0_P0_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3364,
SDP_DOWN_CNT_IN_HBLANK_DP_ENC1_P0_VAL,
SDP_DOWN_CNT_INIT_IN_HBLANK_DP_ENC1_P0_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3300,
VIDEO_AFIFO_RDY_SEL_DP_ENC1_P0_VAL << 8,
VIDEO_AFIFO_RDY_SEL_DP_ENC1_P0_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3364,
FIFO_READ_START_POINT_DP_ENC1_P0_VAL << 12,
FIFO_READ_START_POINT_DP_ENC1_P0_MASK);
mtk_dp_write(mtk_dp, MTK_DP_ENC1_P0_3368, DP_ENC1_P0_3368_VAL);
}
static void mtk_dp_pg_enable(struct mtk_dp *mtk_dp, bool enable)
{
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3038,
enable ? VIDEO_SOURCE_SEL_DP_ENC0_P0_MASK : 0,
VIDEO_SOURCE_SEL_DP_ENC0_P0_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_31B0,
PGEN_PATTERN_SEL_VAL << 4, PGEN_PATTERN_SEL_MASK);
}
static void mtk_dp_audio_setup_channels(struct mtk_dp *mtk_dp,
struct mtk_dp_audio_cfg *cfg)
{
u32 channel_enable_bits;
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3324,
AUDIO_SOURCE_MUX_DP_ENC1_P0_DPRX,
AUDIO_SOURCE_MUX_DP_ENC1_P0_MASK);
/* audio channel count change reset */
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_33F4,
DP_ENC_DUMMY_RW_1, DP_ENC_DUMMY_RW_1);
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3304,
AU_PRTY_REGEN_DP_ENC1_P0_MASK |
AU_CH_STS_REGEN_DP_ENC1_P0_MASK |
AUDIO_SAMPLE_PRSENT_REGEN_DP_ENC1_P0_MASK,
AU_PRTY_REGEN_DP_ENC1_P0_MASK |
AU_CH_STS_REGEN_DP_ENC1_P0_MASK |
AUDIO_SAMPLE_PRSENT_REGEN_DP_ENC1_P0_MASK);
switch (cfg->channels) {
case 2:
channel_enable_bits = AUDIO_2CH_SEL_DP_ENC0_P0_MASK |
AUDIO_2CH_EN_DP_ENC0_P0_MASK;
break;
case 8:
default:
channel_enable_bits = AUDIO_8CH_SEL_DP_ENC0_P0_MASK |
AUDIO_8CH_EN_DP_ENC0_P0_MASK;
break;
}
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3088,
channel_enable_bits | AU_EN_DP_ENC0_P0,
AUDIO_2CH_SEL_DP_ENC0_P0_MASK |
AUDIO_2CH_EN_DP_ENC0_P0_MASK |
AUDIO_8CH_SEL_DP_ENC0_P0_MASK |
AUDIO_8CH_EN_DP_ENC0_P0_MASK |
AU_EN_DP_ENC0_P0);
/* audio channel count change reset */
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_33F4, 0, DP_ENC_DUMMY_RW_1);
/* enable audio reset */
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_33F4,
DP_ENC_DUMMY_RW_1_AUDIO_RST_EN,
DP_ENC_DUMMY_RW_1_AUDIO_RST_EN);
}
static void mtk_dp_audio_channel_status_set(struct mtk_dp *mtk_dp,
struct mtk_dp_audio_cfg *cfg)
{
struct snd_aes_iec958 iec = { 0 };
switch (cfg->sample_rate) {
case 32000:
iec.status[3] = IEC958_AES3_CON_FS_32000;
break;
case 44100:
iec.status[3] = IEC958_AES3_CON_FS_44100;
break;
case 48000:
iec.status[3] = IEC958_AES3_CON_FS_48000;
break;
case 88200:
iec.status[3] = IEC958_AES3_CON_FS_88200;
break;
case 96000:
iec.status[3] = IEC958_AES3_CON_FS_96000;
break;
case 192000:
iec.status[3] = IEC958_AES3_CON_FS_192000;
break;
default:
iec.status[3] = IEC958_AES3_CON_FS_NOTID;
break;
}
switch (cfg->word_length_bits) {
case 16:
iec.status[4] = IEC958_AES4_CON_WORDLEN_20_16;
break;
case 20:
iec.status[4] = IEC958_AES4_CON_WORDLEN_20_16 |
IEC958_AES4_CON_MAX_WORDLEN_24;
break;
case 24:
iec.status[4] = IEC958_AES4_CON_WORDLEN_24_20 |
IEC958_AES4_CON_MAX_WORDLEN_24;
break;
default:
iec.status[4] = IEC958_AES4_CON_WORDLEN_NOTID;
}
/* IEC 60958 consumer channel status bits */
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_308C,
0, CH_STATUS_0_DP_ENC0_P0_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3090,
iec.status[3] << 8, CH_STATUS_1_DP_ENC0_P0_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3094,
iec.status[4], CH_STATUS_2_DP_ENC0_P0_MASK);
}
static void mtk_dp_audio_sdp_asp_set_channels(struct mtk_dp *mtk_dp,
int channels)
{
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_312C,
(min(8, channels) - 1) << 8,
ASP_HB2_DP_ENC0_P0_MASK | ASP_HB3_DP_ENC0_P0_MASK);
}
static void mtk_dp_audio_set_divider(struct mtk_dp *mtk_dp)
{
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_30BC,
AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_DIV_2,
AUDIO_M_CODE_MULT_DIV_SEL_DP_ENC0_P0_MASK);
}
static void mtk_dp_sdp_trigger_aui(struct mtk_dp *mtk_dp)
{
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3280,
MTK_DP_SDP_AUI, SDP_PACKET_TYPE_DP_ENC1_P0_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3280,
SDP_PACKET_W_DP_ENC1_P0, SDP_PACKET_W_DP_ENC1_P0);
}
static void mtk_dp_sdp_set_data(struct mtk_dp *mtk_dp, u8 *data_bytes)
{
mtk_dp_bulk_16bit_write(mtk_dp, MTK_DP_ENC1_P0_3200,
data_bytes, 0x10);
}
static void mtk_dp_sdp_set_header_aui(struct mtk_dp *mtk_dp,
struct dp_sdp_header *header)
{
u32 db_addr = MTK_DP_ENC0_P0_30D8 + (MTK_DP_SDP_AUI - 1) * 8;
mtk_dp_bulk_16bit_write(mtk_dp, db_addr, (u8 *)header, 4);
}
static void mtk_dp_disable_sdp_aui(struct mtk_dp *mtk_dp)
{
/* Disable periodic send */
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_30A8 & 0xfffc, 0,
0xff << ((MTK_DP_ENC0_P0_30A8 & 3) * 8));
}
static void mtk_dp_setup_sdp_aui(struct mtk_dp *mtk_dp,
struct dp_sdp *sdp)
{
u32 shift;
mtk_dp_sdp_set_data(mtk_dp, sdp->db);
mtk_dp_sdp_set_header_aui(mtk_dp, &sdp->sdp_header);
mtk_dp_disable_sdp_aui(mtk_dp);
shift = (MTK_DP_ENC0_P0_30A8 & 3) * 8;
mtk_dp_sdp_trigger_aui(mtk_dp);
/* Enable periodic sending */
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_30A8 & 0xfffc,
0x05 << shift, 0xff << shift);
}
static void mtk_dp_aux_irq_clear(struct mtk_dp *mtk_dp)
{
mtk_dp_write(mtk_dp, MTK_DP_AUX_P0_3640, DP_AUX_P0_3640_VAL);
}
static void mtk_dp_aux_set_cmd(struct mtk_dp *mtk_dp, u8 cmd, u32 addr)
{
mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3644,
cmd, MCU_REQUEST_COMMAND_AUX_TX_P0_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3648,
addr, MCU_REQUEST_ADDRESS_LSB_AUX_TX_P0_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_364C,
addr >> 16, MCU_REQUEST_ADDRESS_MSB_AUX_TX_P0_MASK);
}
static void mtk_dp_aux_clear_fifo(struct mtk_dp *mtk_dp)
{
mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3650,
MCU_ACK_TRAN_COMPLETE_AUX_TX_P0,
MCU_ACK_TRAN_COMPLETE_AUX_TX_P0 |
PHY_FIFO_RST_AUX_TX_P0_MASK |
MCU_REQ_DATA_NUM_AUX_TX_P0_MASK);
}
static void mtk_dp_aux_request_ready(struct mtk_dp *mtk_dp)
{
mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3630,
AUX_TX_REQUEST_READY_AUX_TX_P0,
AUX_TX_REQUEST_READY_AUX_TX_P0);
}
static void mtk_dp_aux_fill_write_fifo(struct mtk_dp *mtk_dp, u8 *buf,
size_t length)
{
mtk_dp_bulk_16bit_write(mtk_dp, MTK_DP_AUX_P0_3708, buf, length);
}
static void mtk_dp_aux_read_rx_fifo(struct mtk_dp *mtk_dp, u8 *buf,
size_t length, int read_delay)
{
int read_pos;
mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3620,
0, AUX_RD_MODE_AUX_TX_P0_MASK);
for (read_pos = 0; read_pos < length; read_pos++) {
mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3620,
AUX_RX_FIFO_READ_PULSE_TX_P0,
AUX_RX_FIFO_READ_PULSE_TX_P0);
/* Hardware needs time to update the data */
usleep_range(read_delay, read_delay * 2);
buf[read_pos] = (u8)(mtk_dp_read(mtk_dp, MTK_DP_AUX_P0_3620) &
AUX_RX_FIFO_READ_DATA_AUX_TX_P0_MASK);
}
}
static void mtk_dp_aux_set_length(struct mtk_dp *mtk_dp, size_t length)
{
if (length > 0) {
mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3650,
(length - 1) << 12,
MCU_REQ_DATA_NUM_AUX_TX_P0_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_362C,
0,
AUX_NO_LENGTH_AUX_TX_P0 |
AUX_TX_AUXTX_OV_EN_AUX_TX_P0_MASK |
AUX_RESERVED_RW_0_AUX_TX_P0_MASK);
} else {
mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_362C,
AUX_NO_LENGTH_AUX_TX_P0,
AUX_NO_LENGTH_AUX_TX_P0 |
AUX_TX_AUXTX_OV_EN_AUX_TX_P0_MASK |
AUX_RESERVED_RW_0_AUX_TX_P0_MASK);
}
}
static int mtk_dp_aux_wait_for_completion(struct mtk_dp *mtk_dp, bool is_read)
{
int wait_reply = MTK_DP_AUX_WAIT_REPLY_COUNT;
while (--wait_reply) {
u32 aux_irq_status;
if (is_read) {
u32 fifo_status = mtk_dp_read(mtk_dp, MTK_DP_AUX_P0_3618);
if (fifo_status &
(AUX_RX_FIFO_WRITE_POINTER_AUX_TX_P0_MASK |
AUX_RX_FIFO_FULL_AUX_TX_P0_MASK)) {
return 0;
}
}
aux_irq_status = mtk_dp_read(mtk_dp, MTK_DP_AUX_P0_3640);
if (aux_irq_status & AUX_RX_AUX_RECV_COMPLETE_IRQ_AUX_TX_P0)
return 0;
if (aux_irq_status & AUX_400US_TIMEOUT_IRQ_AUX_TX_P0)
return -ETIMEDOUT;
/* Give the hardware a chance to reach completion before retrying */
usleep_range(100, 500);
}
return -ETIMEDOUT;
}
static int mtk_dp_aux_do_transfer(struct mtk_dp *mtk_dp, bool is_read, u8 cmd,
u32 addr, u8 *buf, size_t length, u8 *reply_cmd)
{
int ret;
if (is_read && (length > DP_AUX_MAX_PAYLOAD_BYTES ||
(cmd == DP_AUX_NATIVE_READ && !length)))
return -EINVAL;
if (!is_read)
mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3704,
AUX_TX_FIFO_NEW_MODE_EN_AUX_TX_P0,
AUX_TX_FIFO_NEW_MODE_EN_AUX_TX_P0);
/* We need to clear fifo and irq before sending commands to the sink device. */
mtk_dp_aux_clear_fifo(mtk_dp);
mtk_dp_aux_irq_clear(mtk_dp);
mtk_dp_aux_set_cmd(mtk_dp, cmd, addr);
mtk_dp_aux_set_length(mtk_dp, length);
if (!is_read) {
if (length)
mtk_dp_aux_fill_write_fifo(mtk_dp, buf, length);
mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3704,
AUX_TX_FIFO_WDATA_NEW_MODE_T_AUX_TX_P0_MASK,
AUX_TX_FIFO_WDATA_NEW_MODE_T_AUX_TX_P0_MASK);
}
mtk_dp_aux_request_ready(mtk_dp);
/* Wait for feedback from sink device. */
ret = mtk_dp_aux_wait_for_completion(mtk_dp, is_read);
*reply_cmd = mtk_dp_read(mtk_dp, MTK_DP_AUX_P0_3624) &
AUX_RX_REPLY_COMMAND_AUX_TX_P0_MASK;
if (ret) {
u32 phy_status = mtk_dp_read(mtk_dp, MTK_DP_AUX_P0_3628) &
AUX_RX_PHY_STATE_AUX_TX_P0_MASK;
if (phy_status != AUX_RX_PHY_STATE_AUX_TX_P0_RX_IDLE) {
dev_err(mtk_dp->dev,
"AUX Rx Aux hang, need SW reset\n");
return -EIO;
}
return -ETIMEDOUT;
}
if (!length) {
mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_362C,
0,
AUX_NO_LENGTH_AUX_TX_P0 |
AUX_TX_AUXTX_OV_EN_AUX_TX_P0_MASK |
AUX_RESERVED_RW_0_AUX_TX_P0_MASK);
} else if (is_read) {
int read_delay;
if (cmd == (DP_AUX_I2C_READ | DP_AUX_I2C_MOT) ||
cmd == DP_AUX_I2C_READ)
read_delay = 500;
else
read_delay = 100;
mtk_dp_aux_read_rx_fifo(mtk_dp, buf, length, read_delay);
}
return 0;
}
static void mtk_dp_set_swing_pre_emphasis(struct mtk_dp *mtk_dp, int lane_num,
int swing_val, int preemphasis)
{
u32 lane_shift = lane_num * DP_TX1_VOLT_SWING_SHIFT;
dev_dbg(mtk_dp->dev,
"link training: swing_val = 0x%x, pre-emphasis = 0x%x\n",
swing_val, preemphasis);
mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_SWING_EMP,
swing_val << (DP_TX0_VOLT_SWING_SHIFT + lane_shift),
DP_TX0_VOLT_SWING_MASK << lane_shift);
mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_SWING_EMP,
preemphasis << (DP_TX0_PRE_EMPH_SHIFT + lane_shift),
DP_TX0_PRE_EMPH_MASK << lane_shift);
}
static void mtk_dp_reset_swing_pre_emphasis(struct mtk_dp *mtk_dp)
{
mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_SWING_EMP,
0,
DP_TX0_VOLT_SWING_MASK |
DP_TX1_VOLT_SWING_MASK |
DP_TX2_VOLT_SWING_MASK |
DP_TX3_VOLT_SWING_MASK |
DP_TX0_PRE_EMPH_MASK |
DP_TX1_PRE_EMPH_MASK |
DP_TX2_PRE_EMPH_MASK |
DP_TX3_PRE_EMPH_MASK);
}
static u32 mtk_dp_swirq_get_clear(struct mtk_dp *mtk_dp)
{
u32 irq_status = mtk_dp_read(mtk_dp, MTK_DP_TRANS_P0_35D0) &
SW_IRQ_FINAL_STATUS_DP_TRANS_P0_MASK;
if (irq_status) {
mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_35C8,
irq_status, SW_IRQ_CLR_DP_TRANS_P0_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_35C8,
0, SW_IRQ_CLR_DP_TRANS_P0_MASK);
}
return irq_status;
}
static u32 mtk_dp_hwirq_get_clear(struct mtk_dp *mtk_dp)
{
u32 irq_status = (mtk_dp_read(mtk_dp, MTK_DP_TRANS_P0_3418) &
IRQ_STATUS_DP_TRANS_P0_MASK) >> 12;
if (irq_status) {
mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3418,
irq_status, IRQ_CLR_DP_TRANS_P0_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3418,
0, IRQ_CLR_DP_TRANS_P0_MASK);
}
return irq_status;
}
static void mtk_dp_hwirq_enable(struct mtk_dp *mtk_dp, bool enable)
{
mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3418,
enable ? 0 :
IRQ_MASK_DP_TRANS_P0_DISC_IRQ |
IRQ_MASK_DP_TRANS_P0_CONN_IRQ |
IRQ_MASK_DP_TRANS_P0_INT_IRQ,
IRQ_MASK_DP_TRANS_P0_MASK);
}
static void mtk_dp_initialize_settings(struct mtk_dp *mtk_dp)
{
mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_342C,
XTAL_FREQ_DP_TRANS_P0_DEFAULT,
XTAL_FREQ_DP_TRANS_P0_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3540,
FEC_CLOCK_EN_MODE_DP_TRANS_P0,
FEC_CLOCK_EN_MODE_DP_TRANS_P0);
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_31EC,
AUDIO_CH_SRC_SEL_DP_ENC0_P0,
AUDIO_CH_SRC_SEL_DP_ENC0_P0);
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_304C,
0, SDP_VSYNC_RISING_MASK_DP_ENC0_P0_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_IRQ_MASK,
IRQ_MASK_AUX_TOP_IRQ, IRQ_MASK_AUX_TOP_IRQ);
}
static void mtk_dp_initialize_hpd_detect_settings(struct mtk_dp *mtk_dp)
{
u32 val;
/* Debounce threshold */
mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3410,
8, HPD_DEB_THD_DP_TRANS_P0_MASK);
val = (HPD_INT_THD_DP_TRANS_P0_LOWER_500US |
HPD_INT_THD_DP_TRANS_P0_UPPER_1100US) << 4;
mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3410,
val, HPD_INT_THD_DP_TRANS_P0_MASK);
/*
* Connect threshold 1.5ms + 5 x 0.1ms = 2ms
* Disconnect threshold 1.5ms + 5 x 0.1ms = 2ms
*/
val = (5 << 8) | (5 << 12);
mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3410,
val,
HPD_DISC_THD_DP_TRANS_P0_MASK |
HPD_CONN_THD_DP_TRANS_P0_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3430,
HPD_INT_THD_ECO_DP_TRANS_P0_HIGH_BOUND_EXT,
HPD_INT_THD_ECO_DP_TRANS_P0_MASK);
}
static void mtk_dp_initialize_aux_settings(struct mtk_dp *mtk_dp)
{
/* modify timeout threshold = 0x1595 */
mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_360C,
AUX_TIMEOUT_THR_AUX_TX_P0_VAL,
AUX_TIMEOUT_THR_AUX_TX_P0_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3658,
0, AUX_TX_OV_EN_AUX_TX_P0_MASK);
/* 25 for 26M */
mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3634,
AUX_TX_OVER_SAMPLE_RATE_FOR_26M << 8,
AUX_TX_OVER_SAMPLE_RATE_AUX_TX_P0_MASK);
/* 13 for 26M */
mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3614,
AUX_RX_UI_CNT_THR_AUX_FOR_26M,
AUX_RX_UI_CNT_THR_AUX_TX_P0_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_37C8,
MTK_ATOP_EN_AUX_TX_P0,
MTK_ATOP_EN_AUX_TX_P0);
}
static void mtk_dp_initialize_digital_settings(struct mtk_dp *mtk_dp)
{
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_304C,
0, VBID_VIDEO_MUTE_DP_ENC0_P0_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3368,
BS2BS_MODE_DP_ENC1_P0_VAL << 12,
BS2BS_MODE_DP_ENC1_P0_MASK);
/* dp tx encoder reset all sw */
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3004,
DP_TX_ENCODER_4P_RESET_SW_DP_ENC0_P0,
DP_TX_ENCODER_4P_RESET_SW_DP_ENC0_P0);
/* Wait for sw reset to complete */
usleep_range(1000, 5000);
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3004,
0, DP_TX_ENCODER_4P_RESET_SW_DP_ENC0_P0);
}
static void mtk_dp_digital_sw_reset(struct mtk_dp *mtk_dp)
{
mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_340C,
DP_TX_TRANSMITTER_4P_RESET_SW_DP_TRANS_P0,
DP_TX_TRANSMITTER_4P_RESET_SW_DP_TRANS_P0);
/* Wait for sw reset to complete */
usleep_range(1000, 5000);
mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_340C,
0, DP_TX_TRANSMITTER_4P_RESET_SW_DP_TRANS_P0);
}
static void mtk_dp_set_lanes(struct mtk_dp *mtk_dp, int lanes)
{
mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_35F0,
lanes == 0 ? 0 : DP_TRANS_DUMMY_RW_0,
DP_TRANS_DUMMY_RW_0_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3000,
lanes, LANE_NUM_DP_ENC0_P0_MASK);
mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_34A4,
lanes << 2, LANE_NUM_DP_TRANS_P0_MASK);
}
static void mtk_dp_get_calibration_data(struct mtk_dp *mtk_dp)
{
const struct mtk_dp_efuse_fmt *fmt;
struct device *dev = mtk_dp->dev;
struct nvmem_cell *cell;
u32 *cal_data = mtk_dp->cal_data;
u32 *buf;
int i;
size_t len;
cell = nvmem_cell_get(dev, "dp_calibration_data");
if (IS_ERR(cell)) {
dev_warn(dev, "Failed to get nvmem cell dp_calibration_data\n");
goto use_default_val;
}
buf = (u32 *)nvmem_cell_read(cell, &len);
nvmem_cell_put(cell);
if (IS_ERR(buf) || ((len / sizeof(u32)) != 4)) {
dev_warn(dev, "Failed to read nvmem_cell_read\n");
if (!IS_ERR(buf))
kfree(buf);
goto use_default_val;
}
for (i = 0; i < MTK_DP_CAL_MAX; i++) {
fmt = &mtk_dp->data->efuse_fmt[i];
cal_data[i] = (buf[fmt->idx] >> fmt->shift) & fmt->mask;
if (cal_data[i] < fmt->min_val || cal_data[i] > fmt->max_val) {
dev_warn(mtk_dp->dev, "Invalid efuse data, idx = %d\n", i);
kfree(buf);
goto use_default_val;
}
}
kfree(buf);
return;
use_default_val:
dev_warn(mtk_dp->dev, "Use default calibration data\n");
for (i = 0; i < MTK_DP_CAL_MAX; i++)
cal_data[i] = mtk_dp->data->efuse_fmt[i].default_val;
}
static void mtk_dp_set_calibration_data(struct mtk_dp *mtk_dp)
{
u32 *cal_data = mtk_dp->cal_data;
mtk_dp_update_bits(mtk_dp, DP_PHY_GLB_DPAUX_TX,
cal_data[MTK_DP_CAL_CLKTX_IMPSE] << 20,
RG_CKM_PT0_CKTX_IMPSEL);
mtk_dp_update_bits(mtk_dp, DP_PHY_GLB_BIAS_GEN_00,
cal_data[MTK_DP_CAL_GLB_BIAS_TRIM] << 16,
RG_XTP_GLB_BIAS_INTR_CTRL);
mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_0,
cal_data[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_0] << 12,
RG_XTP_LN0_TX_IMPSEL_PMOS);
mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_0,
cal_data[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_0] << 16,
RG_XTP_LN0_TX_IMPSEL_NMOS);
mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_1,
cal_data[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_1] << 12,
RG_XTP_LN1_TX_IMPSEL_PMOS);
mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_1,
cal_data[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_1] << 16,
RG_XTP_LN1_TX_IMPSEL_NMOS);
mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_2,
cal_data[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_2] << 12,
RG_XTP_LN2_TX_IMPSEL_PMOS);
mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_2,
cal_data[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_2] << 16,
RG_XTP_LN2_TX_IMPSEL_NMOS);
mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_3,
cal_data[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_3] << 12,
RG_XTP_LN3_TX_IMPSEL_PMOS);
mtk_dp_update_bits(mtk_dp, DP_PHY_LANE_TX_3,
cal_data[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_3] << 16,
RG_XTP_LN3_TX_IMPSEL_NMOS);
}
static int mtk_dp_phy_configure(struct mtk_dp *mtk_dp,
u32 link_rate, int lane_count)
{
int ret;
union phy_configure_opts phy_opts = {
.dp = {
.link_rate = drm_dp_bw_code_to_link_rate(link_rate) / 100,
.set_rate = 1,
.lanes = lane_count,
.set_lanes = 1,
.ssc = mtk_dp->train_info.sink_ssc,
}
};
mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE, DP_PWR_STATE_BANDGAP,
DP_PWR_STATE_MASK);
ret = phy_configure(mtk_dp->phy, &phy_opts);
if (ret)
return ret;
mtk_dp_set_calibration_data(mtk_dp);
mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
DP_PWR_STATE_BANDGAP_TPLL_LANE, DP_PWR_STATE_MASK);
return 0;
}
static void mtk_dp_set_idle_pattern(struct mtk_dp *mtk_dp, bool enable)
{
u32 val = POST_MISC_DATA_LANE0_OV_DP_TRANS_P0_MASK |
POST_MISC_DATA_LANE1_OV_DP_TRANS_P0_MASK |
POST_MISC_DATA_LANE2_OV_DP_TRANS_P0_MASK |
POST_MISC_DATA_LANE3_OV_DP_TRANS_P0_MASK;
mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3580,
enable ? val : 0, val);
}
static void mtk_dp_train_set_pattern(struct mtk_dp *mtk_dp, int pattern)
{
/* TPS1 */
if (pattern == 1)
mtk_dp_set_idle_pattern(mtk_dp, false);
mtk_dp_update_bits(mtk_dp,
MTK_DP_TRANS_P0_3400,
pattern ? BIT(pattern - 1) << 12 : 0,
PATTERN1_EN_DP_TRANS_P0_MASK |
PATTERN2_EN_DP_TRANS_P0_MASK |
PATTERN3_EN_DP_TRANS_P0_MASK |
PATTERN4_EN_DP_TRANS_P0_MASK);
}
static void mtk_dp_set_enhanced_frame_mode(struct mtk_dp *mtk_dp)
{
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3000,
ENHANCED_FRAME_EN_DP_ENC0_P0,
ENHANCED_FRAME_EN_DP_ENC0_P0);
}
static void mtk_dp_training_set_scramble(struct mtk_dp *mtk_dp, bool enable)
{
mtk_dp_update_bits(mtk_dp, MTK_DP_TRANS_P0_3404,
enable ? DP_SCR_EN_DP_TRANS_P0_MASK : 0,
DP_SCR_EN_DP_TRANS_P0_MASK);
}
static void mtk_dp_video_mute(struct mtk_dp *mtk_dp, bool enable)
{
struct arm_smccc_res res;
u32 val = VIDEO_MUTE_SEL_DP_ENC0_P0 |
(enable ? VIDEO_MUTE_SW_DP_ENC0_P0 : 0);
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3000,
val,
VIDEO_MUTE_SEL_DP_ENC0_P0 |
VIDEO_MUTE_SW_DP_ENC0_P0);
arm_smccc_smc(MTK_DP_SIP_CONTROL_AARCH32,
mtk_dp->data->smc_cmd, enable,
0, 0, 0, 0, 0, &res);
dev_dbg(mtk_dp->dev, "smc cmd: 0x%x, p1: %s, ret: 0x%lx-0x%lx\n",
mtk_dp->data->smc_cmd, enable ? "enable" : "disable", res.a0, res.a1);
}
static void mtk_dp_audio_mute(struct mtk_dp *mtk_dp, bool mute)
{
u32 val[3];
if (mute) {
val[0] = VBID_AUDIO_MUTE_FLAG_SW_DP_ENC0_P0 |
VBID_AUDIO_MUTE_FLAG_SEL_DP_ENC0_P0;
val[1] = 0;
val[2] = 0;
} else {
val[0] = 0;
val[1] = AU_EN_DP_ENC0_P0;
/* Send one every two frames */
val[2] = 0x0F;
}
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3030,
val[0],
VBID_AUDIO_MUTE_FLAG_SW_DP_ENC0_P0 |
VBID_AUDIO_MUTE_FLAG_SEL_DP_ENC0_P0);
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3088,
val[1], AU_EN_DP_ENC0_P0);
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_30A4,
val[2], AU_TS_CFG_DP_ENC0_P0_MASK);
}
static void mtk_dp_power_enable(struct mtk_dp *mtk_dp)
{
mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_RESET_AND_PROBE,
0, SW_RST_B_PHYD);
/* Wait for power enable */
usleep_range(10, 200);
mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_RESET_AND_PROBE,
SW_RST_B_PHYD, SW_RST_B_PHYD);
mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
DP_PWR_STATE_BANDGAP_TPLL, DP_PWR_STATE_MASK);
mtk_dp_write(mtk_dp, MTK_DP_1040,
RG_DPAUX_RX_VALID_DEGLITCH_EN | RG_XTP_GLB_CKDET_EN |
RG_DPAUX_RX_EN);
mtk_dp_update_bits(mtk_dp, MTK_DP_0034, 0, DA_CKM_CKTX0_EN_FORCE_EN);
}
static void mtk_dp_power_disable(struct mtk_dp *mtk_dp)
{
mtk_dp_write(mtk_dp, MTK_DP_TOP_PWR_STATE, 0);
mtk_dp_update_bits(mtk_dp, MTK_DP_0034,
DA_CKM_CKTX0_EN_FORCE_EN, DA_CKM_CKTX0_EN_FORCE_EN);
/* Disable RX */
mtk_dp_write(mtk_dp, MTK_DP_1040, 0);
mtk_dp_write(mtk_dp, MTK_DP_TOP_MEM_PD,
0x550 | FUSE_SEL | MEM_ISO_EN);
}
static void mtk_dp_initialize_priv_data(struct mtk_dp *mtk_dp)
{
mtk_dp->train_info.link_rate = DP_LINK_BW_5_4;
mtk_dp->train_info.lane_count = mtk_dp->max_lanes;
mtk_dp->train_info.cable_plugged_in = false;
mtk_dp->info.format = DP_PIXELFORMAT_RGB;
memset(&mtk_dp->info.vm, 0, sizeof(struct videomode));
mtk_dp->audio_enable = false;
}
static void mtk_dp_sdp_set_down_cnt_init(struct mtk_dp *mtk_dp,
u32 sram_read_start)
{
u32 sdp_down_cnt_init = 0;
struct drm_display_mode mode;
struct videomode *vm = &mtk_dp->info.vm;
drm_display_mode_from_videomode(vm, &mode);
if (mode.clock > 0)
sdp_down_cnt_init = sram_read_start *
mtk_dp->train_info.link_rate * 2700 * 8 /
(mode.clock * 4);
switch (mtk_dp->train_info.lane_count) {
case 1:
sdp_down_cnt_init = max_t(u32, sdp_down_cnt_init, 0x1A);
break;
case 2:
/* case for LowResolution && High Audio Sample Rate */
sdp_down_cnt_init = max_t(u32, sdp_down_cnt_init, 0x10);
sdp_down_cnt_init += mode.vtotal <= 525 ? 4 : 0;
break;
case 4:
default:
sdp_down_cnt_init = max_t(u32, sdp_down_cnt_init, 6);
break;
}
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC0_P0_3040,
sdp_down_cnt_init,
SDP_DOWN_CNT_INIT_DP_ENC0_P0_MASK);
}
static void mtk_dp_sdp_set_down_cnt_init_in_hblank(struct mtk_dp *mtk_dp)
{
int pix_clk_mhz;
u32 dc_offset;
u32 spd_down_cnt_init = 0;
struct drm_display_mode mode;
struct videomode *vm = &mtk_dp->info.vm;
drm_display_mode_from_videomode(vm, &mode);
pix_clk_mhz = mtk_dp->info.format == DP_PIXELFORMAT_YUV420 ?
mode.clock / 2000 : mode.clock / 1000;
switch (mtk_dp->train_info.lane_count) {
case 1:
spd_down_cnt_init = 0x20;
break;
case 2:
dc_offset = (mode.vtotal <= 525) ? 0x14 : 0x00;
spd_down_cnt_init = 0x18 + dc_offset;
break;
case 4:
default:
dc_offset = (mode.vtotal <= 525) ? 0x08 : 0x00;
if (pix_clk_mhz > mtk_dp->train_info.link_rate * 27)
spd_down_cnt_init = 0x8;
else
spd_down_cnt_init = 0x10 + dc_offset;
break;
}
mtk_dp_update_bits(mtk_dp, MTK_DP_ENC1_P0_3364, spd_down_cnt_init,
SDP_DOWN_CNT_INIT_IN_HBLANK_DP_ENC1_P0_MASK);
}
static void mtk_dp_setup_tu(struct mtk_dp *mtk_dp)
{
u32 sram_read_start = min_t(u32, MTK_DP_TBC_BUF_READ_START_ADDR,
mtk_dp->info.vm.hactive /
mtk_dp->train_info.lane_count /
MTK_DP_4P1T / MTK_DP_HDE /
MTK_DP_PIX_PER_ADDR);
mtk_dp_set_sram_read_start(mtk_dp, sram_read_start);
mtk_dp_setup_encoder(mtk_dp);
mtk_dp_sdp_set_down_cnt_init_in_hblank(mtk_dp);
mtk_dp_sdp_set_down_cnt_init(mtk_dp, sram_read_start);
}
static void mtk_dp_set_tx_out(struct mtk_dp *mtk_dp)
{
mtk_dp_setup_tu(mtk_dp);
}
static void mtk_dp_train_update_swing_pre(struct mtk_dp *mtk_dp, int lanes,
u8 dpcd_adjust_req[2])
{
int lane;
for (lane = 0; lane < lanes; ++lane) {
u8 val;
u8 swing;
u8 preemphasis;
int index = lane / 2;
int shift = lane % 2 ? DP_ADJUST_VOLTAGE_SWING_LANE1_SHIFT : 0;
swing = (dpcd_adjust_req[index] >> shift) &
DP_ADJUST_VOLTAGE_SWING_LANE0_MASK;
preemphasis = ((dpcd_adjust_req[index] >> shift) &
DP_ADJUST_PRE_EMPHASIS_LANE0_MASK) >>
DP_ADJUST_PRE_EMPHASIS_LANE0_SHIFT;
val = swing << DP_TRAIN_VOLTAGE_SWING_SHIFT |
preemphasis << DP_TRAIN_PRE_EMPHASIS_SHIFT;
if (swing == DP_TRAIN_VOLTAGE_SWING_LEVEL_3)
val |= DP_TRAIN_MAX_SWING_REACHED;
if (preemphasis == 3)
val |= DP_TRAIN_MAX_PRE_EMPHASIS_REACHED;
mtk_dp_set_swing_pre_emphasis(mtk_dp, lane, swing, preemphasis);
drm_dp_dpcd_writeb(&mtk_dp->aux, DP_TRAINING_LANE0_SET + lane,
val);
}
}
static void mtk_dp_pattern(struct mtk_dp *mtk_dp, bool is_tps1)
{
int pattern;
unsigned int aux_offset;
if (is_tps1) {
pattern = 1;
aux_offset = DP_LINK_SCRAMBLING_DISABLE | DP_TRAINING_PATTERN_1;
} else {
aux_offset = mtk_dp->train_info.channel_eq_pattern;
switch (mtk_dp->train_info.channel_eq_pattern) {
case DP_TRAINING_PATTERN_4:
pattern = 4;
break;
case DP_TRAINING_PATTERN_3:
pattern = 3;
aux_offset |= DP_LINK_SCRAMBLING_DISABLE;
break;
case DP_TRAINING_PATTERN_2:
default:
pattern = 2;
aux_offset |= DP_LINK_SCRAMBLING_DISABLE;
break;
}
}
mtk_dp_train_set_pattern(mtk_dp, pattern);
drm_dp_dpcd_writeb(&mtk_dp->aux, DP_TRAINING_PATTERN_SET, aux_offset);
}
static int mtk_dp_train_setting(struct mtk_dp *mtk_dp, u8 target_link_rate,
u8 target_lane_count)
{
int ret;
drm_dp_dpcd_writeb(&mtk_dp->aux, DP_LINK_BW_SET, target_link_rate);
drm_dp_dpcd_writeb(&mtk_dp->aux, DP_LANE_COUNT_SET,
target_lane_count | DP_LANE_COUNT_ENHANCED_FRAME_EN);
if (mtk_dp->train_info.sink_ssc)
drm_dp_dpcd_writeb(&mtk_dp->aux, DP_DOWNSPREAD_CTRL,
DP_SPREAD_AMP_0_5);
mtk_dp_set_lanes(mtk_dp, target_lane_count / 2);
ret = mtk_dp_phy_configure(mtk_dp, target_link_rate, target_lane_count);
if (ret)
return ret;
dev_dbg(mtk_dp->dev,
"Link train target_link_rate = 0x%x, target_lane_count = 0x%x\n",
target_link_rate, target_lane_count);
return 0;
}
static int mtk_dp_train_cr(struct mtk_dp *mtk_dp, u8 target_lane_count)
{
u8 lane_adjust[2] = {};
u8 link_status[DP_LINK_STATUS_SIZE] = {};
u8 prev_lane_adjust = 0xff;
int train_retries = 0;
int voltage_retries = 0;
mtk_dp_pattern(mtk_dp, true);
/* In DP spec 1.4, the retry count of CR is defined as 10. */
do {
train_retries++;
if (!mtk_dp->train_info.cable_plugged_in) {
mtk_dp_train_set_pattern(mtk_dp, 0);
return -ENODEV;
}
drm_dp_dpcd_read(&mtk_dp->aux, DP_ADJUST_REQUEST_LANE0_1,
lane_adjust, sizeof(lane_adjust));
mtk_dp_train_update_swing_pre(mtk_dp, target_lane_count,
lane_adjust);
drm_dp_link_train_clock_recovery_delay(&mtk_dp->aux,
mtk_dp->rx_cap);
/* check link status from sink device */
drm_dp_dpcd_read_link_status(&mtk_dp->aux, link_status);
if (drm_dp_clock_recovery_ok(link_status,
target_lane_count)) {
dev_dbg(mtk_dp->dev, "Link train CR pass\n");
return 0;
}
/*
* In DP spec 1.4, if current voltage level is the same
* with previous voltage level, we need to retry 5 times.
*/
if (prev_lane_adjust == link_status[4]) {
voltage_retries++;
/*
* Condition of CR fail:
* 1. Failed to pass CR using the same voltage
* level over five times.
* 2. Failed to pass CR when the current voltage
* level is the same with previous voltage
* level and reach max voltage level (3).
*/
if (voltage_retries > MTK_DP_TRAIN_VOLTAGE_LEVEL_RETRY ||
(prev_lane_adjust & DP_ADJUST_VOLTAGE_SWING_LANE0_MASK) == 3) {
dev_dbg(mtk_dp->dev, "Link train CR fail\n");
break;
}
} else {
/*
* If the voltage level is changed, we need to
* re-calculate this retry count.
*/
voltage_retries = 0;
}
prev_lane_adjust = link_status[4];
} while (train_retries < MTK_DP_TRAIN_DOWNSCALE_RETRY);
/* Failed to train CR, and disable pattern. */
drm_dp_dpcd_writeb(&mtk_dp->aux, DP_TRAINING_PATTERN_SET,
DP_TRAINING_PATTERN_DISABLE);
mtk_dp_train_set_pattern(mtk_dp, 0);
return -ETIMEDOUT;
}
static int mtk_dp_train_eq(struct mtk_dp *mtk_dp, u8 target_lane_count)
{
u8 lane_adjust[2] = {};
u8 link_status[DP_LINK_STATUS_SIZE] = {};
int train_retries = 0;
mtk_dp_pattern(mtk_dp, false);
do {
train_retries++;
if (!mtk_dp->train_info.cable_plugged_in) {
mtk_dp_train_set_pattern(mtk_dp, 0);
return -ENODEV;
}
drm_dp_dpcd_read(&mtk_dp->aux, DP_ADJUST_REQUEST_LANE0_1,
lane_adjust, sizeof(lane_adjust));
mtk_dp_train_update_swing_pre(mtk_dp, target_lane_count,
lane_adjust);
drm_dp_link_train_channel_eq_delay(&mtk_dp->aux,
mtk_dp->rx_cap);
/* check link status from sink device */
drm_dp_dpcd_read_link_status(&mtk_dp->aux, link_status);
if (drm_dp_channel_eq_ok(link_status, target_lane_count)) {
dev_dbg(mtk_dp->dev, "Link train EQ pass\n");
/* Training done, and disable pattern. */
drm_dp_dpcd_writeb(&mtk_dp->aux, DP_TRAINING_PATTERN_SET,
DP_TRAINING_PATTERN_DISABLE);
mtk_dp_train_set_pattern(mtk_dp, 0);
return 0;
}
dev_dbg(mtk_dp->dev, "Link train EQ fail\n");
} while (train_retries < MTK_DP_TRAIN_DOWNSCALE_RETRY);
/* Failed to train EQ, and disable pattern. */
drm_dp_dpcd_writeb(&mtk_dp->aux, DP_TRAINING_PATTERN_SET,
DP_TRAINING_PATTERN_DISABLE);
mtk_dp_train_set_pattern(mtk_dp, 0);
return -ETIMEDOUT;
}
static int mtk_dp_parse_capabilities(struct mtk_dp *mtk_dp)
{
u8 val;
ssize_t ret;
ret = drm_dp_read_dpcd_caps(&mtk_dp->aux, mtk_dp->rx_cap);
if (ret < 0)
return ret;
if (drm_dp_tps4_supported(mtk_dp->rx_cap))
mtk_dp->train_info.channel_eq_pattern = DP_TRAINING_PATTERN_4;
else if (drm_dp_tps3_supported(mtk_dp->rx_cap))
mtk_dp->train_info.channel_eq_pattern = DP_TRAINING_PATTERN_3;
else
mtk_dp->train_info.channel_eq_pattern = DP_TRAINING_PATTERN_2;
mtk_dp->train_info.sink_ssc = drm_dp_max_downspread(mtk_dp->rx_cap);
ret = drm_dp_dpcd_readb(&mtk_dp->aux, DP_MSTM_CAP, &val);
if (ret < 1) {
drm_err(mtk_dp->drm_dev, "Read mstm cap failed\n");
return ret == 0 ? -EIO : ret;
}
if (val & DP_MST_CAP) {
/* Clear DP_DEVICE_SERVICE_IRQ_VECTOR_ESI0 */
ret = drm_dp_dpcd_readb(&mtk_dp->aux,
DP_DEVICE_SERVICE_IRQ_VECTOR_ESI0,
&val);
if (ret < 1) {
drm_err(mtk_dp->drm_dev, "Read irq vector failed\n");
return ret == 0 ? -EIO : ret;
}
if (val) {
ret = drm_dp_dpcd_writeb(&mtk_dp->aux,
DP_DEVICE_SERVICE_IRQ_VECTOR_ESI0,
val);
if (ret < 0)
return ret;
}
}
return 0;
}
static bool mtk_dp_edid_parse_audio_capabilities(struct mtk_dp *mtk_dp,
struct mtk_dp_audio_cfg *cfg)
{
if (!mtk_dp->data->audio_supported)
return false;
if (mtk_dp->info.audio_cur_cfg.sad_count <= 0) {
drm_info(mtk_dp->drm_dev, "The SADs is NULL\n");
return false;
}
return true;
}
static void mtk_dp_train_change_mode(struct mtk_dp *mtk_dp)
{
phy_reset(mtk_dp->phy);
mtk_dp_reset_swing_pre_emphasis(mtk_dp);
}
static int mtk_dp_training(struct mtk_dp *mtk_dp)
{
int ret;
u8 lane_count, link_rate, train_limit, max_link_rate;
link_rate = min_t(u8, mtk_dp->max_linkrate,
mtk_dp->rx_cap[DP_MAX_LINK_RATE]);
max_link_rate = link_rate;
lane_count = min_t(u8, mtk_dp->max_lanes,
drm_dp_max_lane_count(mtk_dp->rx_cap));
/*
* TPS are generated by the hardware pattern generator. From the
* hardware setting we need to disable this scramble setting before
* use the TPS pattern generator.
*/
mtk_dp_training_set_scramble(mtk_dp, false);
for (train_limit = 6; train_limit > 0; train_limit--) {
mtk_dp_train_change_mode(mtk_dp);
ret = mtk_dp_train_setting(mtk_dp, link_rate, lane_count);
if (ret)
return ret;
ret = mtk_dp_train_cr(mtk_dp, lane_count);
if (ret == -ENODEV) {
return ret;
} else if (ret) {
/* reduce link rate */
switch (link_rate) {
case DP_LINK_BW_1_62:
lane_count = lane_count / 2;
link_rate = max_link_rate;
if (lane_count == 0)
return -EIO;
break;
case DP_LINK_BW_2_7:
link_rate = DP_LINK_BW_1_62;
break;
case DP_LINK_BW_5_4:
link_rate = DP_LINK_BW_2_7;
break;
case DP_LINK_BW_8_1:
link_rate = DP_LINK_BW_5_4;
break;
default:
return -EINVAL;
};
continue;
}
ret = mtk_dp_train_eq(mtk_dp, lane_count);
if (ret == -ENODEV) {
return ret;
} else if (ret) {
/* reduce lane count */
if (lane_count == 0)
return -EIO;
lane_count /= 2;
continue;
}
/* if we can run to this, training is done. */
break;
}
if (train_limit == 0)
return -ETIMEDOUT;
mtk_dp->train_info.link_rate = link_rate;
mtk_dp->train_info.lane_count = lane_count;
/*
* After training done, we need to output normal stream instead of TPS,
* so we need to enable scramble.
*/
mtk_dp_training_set_scramble(mtk_dp, true);
mtk_dp_set_enhanced_frame_mode(mtk_dp);
return 0;
}
static void mtk_dp_video_enable(struct mtk_dp *mtk_dp, bool enable)
{
/* the mute sequence is different between enable and disable */
if (enable) {
mtk_dp_msa_bypass_enable(mtk_dp, false);
mtk_dp_pg_enable(mtk_dp, false);
mtk_dp_set_tx_out(mtk_dp);
mtk_dp_video_mute(mtk_dp, false);
} else {
mtk_dp_video_mute(mtk_dp, true);
mtk_dp_pg_enable(mtk_dp, true);
mtk_dp_msa_bypass_enable(mtk_dp, true);
}
}
static void mtk_dp_audio_sdp_setup(struct mtk_dp *mtk_dp,
struct mtk_dp_audio_cfg *cfg)
{
struct dp_sdp sdp;
struct hdmi_audio_infoframe frame;
hdmi_audio_infoframe_init(&frame);
frame.coding_type = HDMI_AUDIO_CODING_TYPE_PCM;
frame.channels = cfg->channels;
frame.sample_frequency = cfg->sample_rate;
switch (cfg->word_length_bits) {
case 16:
frame.sample_size = HDMI_AUDIO_SAMPLE_SIZE_16;
break;
case 20:
frame.sample_size = HDMI_AUDIO_SAMPLE_SIZE_20;
break;
case 24:
default:
frame.sample_size = HDMI_AUDIO_SAMPLE_SIZE_24;
break;
}
hdmi_audio_infoframe_pack_for_dp(&frame, &sdp, MTK_DP_VERSION);
mtk_dp_audio_sdp_asp_set_channels(mtk_dp, cfg->channels);
mtk_dp_setup_sdp_aui(mtk_dp, &sdp);
}
static void mtk_dp_audio_setup(struct mtk_dp *mtk_dp,
struct mtk_dp_audio_cfg *cfg)
{
mtk_dp_audio_sdp_setup(mtk_dp, cfg);
mtk_dp_audio_channel_status_set(mtk_dp, cfg);
mtk_dp_audio_setup_channels(mtk_dp, cfg);
mtk_dp_audio_set_divider(mtk_dp);
}
static int mtk_dp_video_config(struct mtk_dp *mtk_dp)
{
mtk_dp_config_mn_mode(mtk_dp);
mtk_dp_set_msa(mtk_dp);
mtk_dp_set_color_depth(mtk_dp);
return mtk_dp_set_color_format(mtk_dp, mtk_dp->info.format);
}
static void mtk_dp_init_port(struct mtk_dp *mtk_dp)
{
mtk_dp_set_idle_pattern(mtk_dp, true);
mtk_dp_initialize_priv_data(mtk_dp);
mtk_dp_initialize_settings(mtk_dp);
mtk_dp_initialize_aux_settings(mtk_dp);
mtk_dp_initialize_digital_settings(mtk_dp);
mtk_dp_update_bits(mtk_dp, MTK_DP_AUX_P0_3690,
RX_REPLY_COMPLETE_MODE_AUX_TX_P0,
RX_REPLY_COMPLETE_MODE_AUX_TX_P0);
mtk_dp_initialize_hpd_detect_settings(mtk_dp);
mtk_dp_digital_sw_reset(mtk_dp);
}
static irqreturn_t mtk_dp_hpd_event_thread(int hpd, void *dev)
{
struct mtk_dp *mtk_dp = dev;
unsigned long flags;
u32 status;
if (mtk_dp->need_debounce && mtk_dp->train_info.cable_plugged_in)
msleep(100);
spin_lock_irqsave(&mtk_dp->irq_thread_lock, flags);
status = mtk_dp->irq_thread_handle;
mtk_dp->irq_thread_handle = 0;
spin_unlock_irqrestore(&mtk_dp->irq_thread_lock, flags);
if (status & MTK_DP_THREAD_CABLE_STATE_CHG) {
if (mtk_dp->bridge.dev)
drm_helper_hpd_irq_event(mtk_dp->bridge.dev);
if (!mtk_dp->train_info.cable_plugged_in) {
mtk_dp_disable_sdp_aui(mtk_dp);
memset(&mtk_dp->info.audio_cur_cfg, 0,
sizeof(mtk_dp->info.audio_cur_cfg));
mtk_dp->need_debounce = false;
mod_timer(&mtk_dp->debounce_timer,
jiffies + msecs_to_jiffies(100) - 1);
}
}
if (status & MTK_DP_THREAD_HPD_EVENT)
dev_dbg(mtk_dp->dev, "Receive IRQ from sink devices\n");
return IRQ_HANDLED;
}
static irqreturn_t mtk_dp_hpd_event(int hpd, void *dev)
{
struct mtk_dp *mtk_dp = dev;
bool cable_sta_chg = false;
unsigned long flags;
u32 irq_status = mtk_dp_swirq_get_clear(mtk_dp) |
mtk_dp_hwirq_get_clear(mtk_dp);
if (!irq_status)
return IRQ_HANDLED;
spin_lock_irqsave(&mtk_dp->irq_thread_lock, flags);
if (irq_status & MTK_DP_HPD_INTERRUPT)
mtk_dp->irq_thread_handle |= MTK_DP_THREAD_HPD_EVENT;
/* Cable state is changed. */
if (irq_status != MTK_DP_HPD_INTERRUPT) {
mtk_dp->irq_thread_handle |= MTK_DP_THREAD_CABLE_STATE_CHG;
cable_sta_chg = true;
}
spin_unlock_irqrestore(&mtk_dp->irq_thread_lock, flags);
if (cable_sta_chg) {
if (!!(mtk_dp_read(mtk_dp, MTK_DP_TRANS_P0_3414) &
HPD_DB_DP_TRANS_P0_MASK))
mtk_dp->train_info.cable_plugged_in = true;
else
mtk_dp->train_info.cable_plugged_in = false;
}
return IRQ_WAKE_THREAD;
}
static int mtk_dp_dt_parse(struct mtk_dp *mtk_dp,
struct platform_device *pdev)
{
struct device_node *endpoint;
struct device *dev = &pdev->dev;
int ret;
void __iomem *base;
u32 linkrate;
int len;
base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(base))
return PTR_ERR(base);
mtk_dp->regs = devm_regmap_init_mmio(dev, base, &mtk_dp_regmap_config);
if (IS_ERR(mtk_dp->regs))
return PTR_ERR(mtk_dp->regs);
endpoint = of_graph_get_endpoint_by_regs(pdev->dev.of_node, 1, -1);
len = of_property_count_elems_of_size(endpoint,
"data-lanes", sizeof(u32));
if (len < 0 || len > 4 || len == 3) {
dev_err(dev, "invalid data lane size: %d\n", len);
return -EINVAL;
}
mtk_dp->max_lanes = len;
ret = device_property_read_u32(dev, "max-linkrate-mhz", &linkrate);
if (ret) {
dev_err(dev, "failed to read max linkrate: %d\n", ret);
return ret;
}
mtk_dp->max_linkrate = drm_dp_link_rate_to_bw_code(linkrate * 100);
return 0;
}
static void mtk_dp_update_plugged_status(struct mtk_dp *mtk_dp)
{
mutex_lock(&mtk_dp->update_plugged_status_lock);
if (mtk_dp->plugged_cb && mtk_dp->codec_dev)
mtk_dp->plugged_cb(mtk_dp->codec_dev,
mtk_dp->enabled &
mtk_dp->info.audio_cur_cfg.detect_monitor);
mutex_unlock(&mtk_dp->update_plugged_status_lock);
}
static enum drm_connector_status mtk_dp_bdg_detect(struct drm_bridge *bridge)
{
struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
enum drm_connector_status ret = connector_status_disconnected;
bool enabled = mtk_dp->enabled;
u8 sink_count = 0;
if (!mtk_dp->train_info.cable_plugged_in)
return ret;
if (!enabled) {
/* power on aux */
mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
DP_PWR_STATE_BANDGAP_TPLL_LANE,
DP_PWR_STATE_MASK);
/* power on panel */
drm_dp_dpcd_writeb(&mtk_dp->aux, DP_SET_POWER, DP_SET_POWER_D0);
usleep_range(2000, 5000);
}
/*
* Some dongles still source HPD when they do not connect to any
* sink device. To avoid this, we need to read the sink count
* to make sure we do connect to sink devices. After this detect
* function, we just need to check the HPD connection to check
* whether we connect to a sink device.
*/
drm_dp_dpcd_readb(&mtk_dp->aux, DP_SINK_COUNT, &sink_count);
if (DP_GET_SINK_COUNT(sink_count))
ret = connector_status_connected;
if (!enabled) {
/* power off panel */
drm_dp_dpcd_writeb(&mtk_dp->aux, DP_SET_POWER, DP_SET_POWER_D3);
usleep_range(2000, 3000);
/* power off aux */
mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
DP_PWR_STATE_BANDGAP_TPLL,
DP_PWR_STATE_MASK);
}
return ret;
}
static struct edid *mtk_dp_get_edid(struct drm_bridge *bridge,
struct drm_connector *connector)
{
struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
bool enabled = mtk_dp->enabled;
struct edid *new_edid = NULL;
struct mtk_dp_audio_cfg *audio_caps = &mtk_dp->info.audio_cur_cfg;
struct cea_sad *sads;
if (!enabled) {
drm_bridge_chain_pre_enable(bridge);
/* power on aux */
mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
DP_PWR_STATE_BANDGAP_TPLL_LANE,
DP_PWR_STATE_MASK);
/* power on panel */
drm_dp_dpcd_writeb(&mtk_dp->aux, DP_SET_POWER, DP_SET_POWER_D0);
usleep_range(2000, 5000);
}
new_edid = drm_get_edid(connector, &mtk_dp->aux.ddc);
/*
* Parse capability here to let atomic_get_input_bus_fmts and
* mode_valid use the capability to calculate sink bitrates.
*/
if (mtk_dp_parse_capabilities(mtk_dp)) {
drm_err(mtk_dp->drm_dev, "Can't parse capabilities\n");
new_edid = NULL;
}
if (new_edid) {
audio_caps->sad_count = drm_edid_to_sad(new_edid, &sads);
audio_caps->detect_monitor = drm_detect_monitor_audio(new_edid);
}
if (!enabled) {
/* power off panel */
drm_dp_dpcd_writeb(&mtk_dp->aux, DP_SET_POWER, DP_SET_POWER_D3);
usleep_range(2000, 3000);
/* power off aux */
mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
DP_PWR_STATE_BANDGAP_TPLL,
DP_PWR_STATE_MASK);
drm_bridge_chain_post_disable(bridge);
}
return new_edid;
}
static ssize_t mtk_dp_aux_transfer(struct drm_dp_aux *mtk_aux,
struct drm_dp_aux_msg *msg)
{
struct mtk_dp *mtk_dp;
bool is_read;
u8 request;
size_t accessed_bytes = 0;
int ret;
mtk_dp = container_of(mtk_aux, struct mtk_dp, aux);
if (!mtk_dp->train_info.cable_plugged_in) {
ret = -EAGAIN;
goto err;
}
switch (msg->request) {
case DP_AUX_I2C_MOT:
case DP_AUX_I2C_WRITE:
case DP_AUX_NATIVE_WRITE:
case DP_AUX_I2C_WRITE_STATUS_UPDATE:
case DP_AUX_I2C_WRITE_STATUS_UPDATE | DP_AUX_I2C_MOT:
request = msg->request & ~DP_AUX_I2C_WRITE_STATUS_UPDATE;
is_read = false;
break;
case DP_AUX_I2C_READ:
case DP_AUX_NATIVE_READ:
case DP_AUX_I2C_READ | DP_AUX_I2C_MOT:
request = msg->request;
is_read = true;
break;
default:
dev_err(mtk_dp->dev, "invalid aux cmd = %d\n",
msg->request);
ret = -EINVAL;
goto err;
}
do {
size_t to_access = min_t(size_t, DP_AUX_MAX_PAYLOAD_BYTES,
msg->size - accessed_bytes);
ret = mtk_dp_aux_do_transfer(mtk_dp, is_read, request,
msg->address + accessed_bytes,
msg->buffer + accessed_bytes,
to_access, &msg->reply);
if (ret) {
dev_info(mtk_dp->dev,
"Failed to do AUX transfer: %d\n", ret);
goto err;
}
accessed_bytes += to_access;
} while (accessed_bytes < msg->size);
return msg->size;
err:
msg->reply = DP_AUX_NATIVE_REPLY_NACK | DP_AUX_I2C_REPLY_NACK;
return ret;
}
static int mtk_dp_poweron(struct mtk_dp *mtk_dp)
{
int ret;
ret = phy_init(mtk_dp->phy);
if (ret) {
dev_err(mtk_dp->dev, "Failed to initialize phy: %d\n", ret);
return ret;
}
mtk_dp_init_port(mtk_dp);
mtk_dp_power_enable(mtk_dp);
return 0;
}
static void mtk_dp_poweroff(struct mtk_dp *mtk_dp)
{
mtk_dp_power_disable(mtk_dp);
phy_exit(mtk_dp->phy);
}
static int mtk_dp_bridge_attach(struct drm_bridge *bridge,
enum drm_bridge_attach_flags flags)
{
struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
int ret;
if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
dev_err(mtk_dp->dev, "Driver does not provide a connector!");
return -EINVAL;
}
mtk_dp->aux.drm_dev = bridge->dev;
ret = drm_dp_aux_register(&mtk_dp->aux);
if (ret) {
dev_err(mtk_dp->dev,
"failed to register DP AUX channel: %d\n", ret);
return ret;
}
ret = mtk_dp_poweron(mtk_dp);
if (ret)
goto err_aux_register;
if (mtk_dp->next_bridge) {
ret = drm_bridge_attach(bridge->encoder, mtk_dp->next_bridge,
&mtk_dp->bridge, flags);
if (ret) {
drm_warn(mtk_dp->drm_dev,
"Failed to attach external bridge: %d\n", ret);
goto err_bridge_attach;
}
}
mtk_dp->drm_dev = bridge->dev;
mtk_dp_hwirq_enable(mtk_dp, true);
return 0;
err_bridge_attach:
mtk_dp_poweroff(mtk_dp);
err_aux_register:
drm_dp_aux_unregister(&mtk_dp->aux);
return ret;
}
static void mtk_dp_bridge_detach(struct drm_bridge *bridge)
{
struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
mtk_dp_hwirq_enable(mtk_dp, false);
mtk_dp->drm_dev = NULL;
mtk_dp_poweroff(mtk_dp);
drm_dp_aux_unregister(&mtk_dp->aux);
}
static void mtk_dp_bridge_atomic_enable(struct drm_bridge *bridge,
struct drm_bridge_state *old_state)
{
struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
int ret;
mtk_dp->conn = drm_atomic_get_new_connector_for_encoder(old_state->base.state,
bridge->encoder);
if (!mtk_dp->conn) {
drm_err(mtk_dp->drm_dev,
"Can't enable bridge as connector is missing\n");
return;
}
/* power on aux */
mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
DP_PWR_STATE_BANDGAP_TPLL_LANE,
DP_PWR_STATE_MASK);
if (mtk_dp->train_info.cable_plugged_in) {
drm_dp_dpcd_writeb(&mtk_dp->aux, DP_SET_POWER, DP_SET_POWER_D0);
usleep_range(2000, 5000);
}
/* Training */
ret = mtk_dp_training(mtk_dp);
if (ret) {
drm_err(mtk_dp->drm_dev, "Training failed, %d\n", ret);
goto power_off_aux;
}
ret = mtk_dp_video_config(mtk_dp);
if (ret)
goto power_off_aux;
mtk_dp_video_enable(mtk_dp, true);
mtk_dp->audio_enable =
mtk_dp_edid_parse_audio_capabilities(mtk_dp,
&mtk_dp->info.audio_cur_cfg);
if (mtk_dp->audio_enable) {
mtk_dp_audio_setup(mtk_dp, &mtk_dp->info.audio_cur_cfg);
mtk_dp_audio_mute(mtk_dp, false);
} else {
memset(&mtk_dp->info.audio_cur_cfg, 0,
sizeof(mtk_dp->info.audio_cur_cfg));
}
mtk_dp->enabled = true;
mtk_dp_update_plugged_status(mtk_dp);
return;
power_off_aux:
mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
DP_PWR_STATE_BANDGAP_TPLL,
DP_PWR_STATE_MASK);
}
static void mtk_dp_bridge_atomic_disable(struct drm_bridge *bridge,
struct drm_bridge_state *old_state)
{
struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
mtk_dp->enabled = false;
mtk_dp_update_plugged_status(mtk_dp);
mtk_dp_video_enable(mtk_dp, false);
mtk_dp_audio_mute(mtk_dp, true);
if (mtk_dp->train_info.cable_plugged_in) {
drm_dp_dpcd_writeb(&mtk_dp->aux, DP_SET_POWER, DP_SET_POWER_D3);
usleep_range(2000, 3000);
}
/* power off aux */
mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
DP_PWR_STATE_BANDGAP_TPLL,
DP_PWR_STATE_MASK);
/* Ensure the sink is muted */
msleep(20);
}
static enum drm_mode_status
mtk_dp_bridge_mode_valid(struct drm_bridge *bridge,
const struct drm_display_info *info,
const struct drm_display_mode *mode)
{
struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
u32 bpp = info->color_formats & DRM_COLOR_FORMAT_YCBCR422 ? 16 : 24;
u32 rate = min_t(u32, drm_dp_max_link_rate(mtk_dp->rx_cap) *
drm_dp_max_lane_count(mtk_dp->rx_cap),
drm_dp_bw_code_to_link_rate(mtk_dp->max_linkrate) *
mtk_dp->max_lanes);
if (rate < mode->clock * bpp / 8)
return MODE_CLOCK_HIGH;
return MODE_OK;
}
static u32 *mtk_dp_bridge_atomic_get_output_bus_fmts(struct drm_bridge *bridge,
struct drm_bridge_state *bridge_state,
struct drm_crtc_state *crtc_state,
struct drm_connector_state *conn_state,
unsigned int *num_output_fmts)
{
u32 *output_fmts;
*num_output_fmts = 0;
output_fmts = kmalloc(sizeof(*output_fmts), GFP_KERNEL);
if (!output_fmts)
return NULL;
*num_output_fmts = 1;
output_fmts[0] = MEDIA_BUS_FMT_FIXED;
return output_fmts;
}
static const u32 mt8195_input_fmts[] = {
MEDIA_BUS_FMT_RGB888_1X24,
MEDIA_BUS_FMT_YUV8_1X24,
MEDIA_BUS_FMT_YUYV8_1X16,
};
static u32 *mtk_dp_bridge_atomic_get_input_bus_fmts(struct drm_bridge *bridge,
struct drm_bridge_state *bridge_state,
struct drm_crtc_state *crtc_state,
struct drm_connector_state *conn_state,
u32 output_fmt,
unsigned int *num_input_fmts)
{
u32 *input_fmts;
struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
struct drm_display_mode *mode = &crtc_state->adjusted_mode;
struct drm_display_info *display_info =
&conn_state->connector->display_info;
u32 rate = min_t(u32, drm_dp_max_link_rate(mtk_dp->rx_cap) *
drm_dp_max_lane_count(mtk_dp->rx_cap),
drm_dp_bw_code_to_link_rate(mtk_dp->max_linkrate) *
mtk_dp->max_lanes);
*num_input_fmts = 0;
/*
* If the linkrate is smaller than datarate of RGB888, larger than
* datarate of YUV422 and sink device supports YUV422, we output YUV422
* format. Use this condition, we can support more resolution.
*/
if ((rate < (mode->clock * 24 / 8)) &&
(rate > (mode->clock * 16 / 8)) &&
(display_info->color_formats & DRM_COLOR_FORMAT_YCBCR422)) {
input_fmts = kcalloc(1, sizeof(*input_fmts), GFP_KERNEL);
if (!input_fmts)
return NULL;
*num_input_fmts = 1;
input_fmts[0] = MEDIA_BUS_FMT_YUYV8_1X16;
} else {
input_fmts = kcalloc(ARRAY_SIZE(mt8195_input_fmts),
sizeof(*input_fmts),
GFP_KERNEL);
if (!input_fmts)
return NULL;
*num_input_fmts = ARRAY_SIZE(mt8195_input_fmts);
memcpy(input_fmts, mt8195_input_fmts, sizeof(mt8195_input_fmts));
}
return input_fmts;
}
static int mtk_dp_bridge_atomic_check(struct drm_bridge *bridge,
struct drm_bridge_state *bridge_state,
struct drm_crtc_state *crtc_state,
struct drm_connector_state *conn_state)
{
struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
struct drm_crtc *crtc = conn_state->crtc;
unsigned int input_bus_format;
input_bus_format = bridge_state->input_bus_cfg.format;
dev_dbg(mtk_dp->dev, "input format 0x%04x, output format 0x%04x\n",
bridge_state->input_bus_cfg.format,
bridge_state->output_bus_cfg.format);
if (input_bus_format == MEDIA_BUS_FMT_YUYV8_1X16)
mtk_dp->info.format = DP_PIXELFORMAT_YUV422;
else
mtk_dp->info.format = DP_PIXELFORMAT_RGB;
if (!crtc) {
drm_err(mtk_dp->drm_dev,
"Can't enable bridge as connector state doesn't have a crtc\n");
return -EINVAL;
}
drm_display_mode_to_videomode(&crtc_state->adjusted_mode, &mtk_dp->info.vm);
return 0;
}
static const struct drm_bridge_funcs mtk_dp_bridge_funcs = {
.atomic_check = mtk_dp_bridge_atomic_check,
.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
.atomic_get_output_bus_fmts = mtk_dp_bridge_atomic_get_output_bus_fmts,
.atomic_get_input_bus_fmts = mtk_dp_bridge_atomic_get_input_bus_fmts,
.atomic_reset = drm_atomic_helper_bridge_reset,
.attach = mtk_dp_bridge_attach,
.detach = mtk_dp_bridge_detach,
.atomic_enable = mtk_dp_bridge_atomic_enable,
.atomic_disable = mtk_dp_bridge_atomic_disable,
.mode_valid = mtk_dp_bridge_mode_valid,
.get_edid = mtk_dp_get_edid,
.detect = mtk_dp_bdg_detect,
};
static void mtk_dp_debounce_timer(struct timer_list *t)
{
struct mtk_dp *mtk_dp = from_timer(mtk_dp, t, debounce_timer);
mtk_dp->need_debounce = true;
}
/*
* HDMI audio codec callbacks
*/
static int mtk_dp_audio_hw_params(struct device *dev, void *data,
struct hdmi_codec_daifmt *daifmt,
struct hdmi_codec_params *params)
{
struct mtk_dp *mtk_dp = dev_get_drvdata(dev);
if (!mtk_dp->enabled) {
dev_err(mtk_dp->dev, "%s, DP is not ready!\n", __func__);
return -ENODEV;
}
mtk_dp->info.audio_cur_cfg.channels = params->cea.channels;
mtk_dp->info.audio_cur_cfg.sample_rate = params->sample_rate;
mtk_dp_audio_setup(mtk_dp, &mtk_dp->info.audio_cur_cfg);
return 0;
}
static int mtk_dp_audio_startup(struct device *dev, void *data)
{
struct mtk_dp *mtk_dp = dev_get_drvdata(dev);
mtk_dp_audio_mute(mtk_dp, false);
return 0;
}
static void mtk_dp_audio_shutdown(struct device *dev, void *data)
{
struct mtk_dp *mtk_dp = dev_get_drvdata(dev);
mtk_dp_audio_mute(mtk_dp, true);
}
static int mtk_dp_audio_get_eld(struct device *dev, void *data, uint8_t *buf,
size_t len)
{
struct mtk_dp *mtk_dp = dev_get_drvdata(dev);
if (mtk_dp->enabled)
memcpy(buf, mtk_dp->conn->eld, len);
else
memset(buf, 0, len);
return 0;
}
static int mtk_dp_audio_hook_plugged_cb(struct device *dev, void *data,
hdmi_codec_plugged_cb fn,
struct device *codec_dev)
{
struct mtk_dp *mtk_dp = data;
mutex_lock(&mtk_dp->update_plugged_status_lock);
mtk_dp->plugged_cb = fn;
mtk_dp->codec_dev = codec_dev;
mutex_unlock(&mtk_dp->update_plugged_status_lock);
mtk_dp_update_plugged_status(mtk_dp);
return 0;
}
static const struct hdmi_codec_ops mtk_dp_audio_codec_ops = {
.hw_params = mtk_dp_audio_hw_params,
.audio_startup = mtk_dp_audio_startup,
.audio_shutdown = mtk_dp_audio_shutdown,
.get_eld = mtk_dp_audio_get_eld,
.hook_plugged_cb = mtk_dp_audio_hook_plugged_cb,
.no_capture_mute = 1,
};
static int mtk_dp_register_audio_driver(struct device *dev)
{
struct mtk_dp *mtk_dp = dev_get_drvdata(dev);
struct hdmi_codec_pdata codec_data = {
.ops = &mtk_dp_audio_codec_ops,
.max_i2s_channels = 8,
.i2s = 1,
.data = mtk_dp,
};
mtk_dp->audio_pdev = platform_device_register_data(dev,
HDMI_CODEC_DRV_NAME,
PLATFORM_DEVID_AUTO,
&codec_data,
sizeof(codec_data));
return PTR_ERR_OR_ZERO(mtk_dp->audio_pdev);
}
static int mtk_dp_probe(struct platform_device *pdev)
{
struct mtk_dp *mtk_dp;
struct device *dev = &pdev->dev;
int ret, irq_num;
mtk_dp = devm_kzalloc(dev, sizeof(*mtk_dp), GFP_KERNEL);
if (!mtk_dp)
return -ENOMEM;
mtk_dp->dev = dev;
mtk_dp->data = (struct mtk_dp_data *)of_device_get_match_data(dev);
irq_num = platform_get_irq(pdev, 0);
if (irq_num < 0)
return dev_err_probe(dev, irq_num,
"failed to request dp irq resource\n");
mtk_dp->next_bridge = devm_drm_of_get_bridge(dev, dev->of_node, 1, 0);
if (IS_ERR(mtk_dp->next_bridge) &&
PTR_ERR(mtk_dp->next_bridge) == -ENODEV)
mtk_dp->next_bridge = NULL;
else if (IS_ERR(mtk_dp->next_bridge))
return dev_err_probe(dev, PTR_ERR(mtk_dp->next_bridge),
"Failed to get bridge\n");
ret = mtk_dp_dt_parse(mtk_dp, pdev);
if (ret)
return dev_err_probe(dev, ret, "Failed to parse dt\n");
drm_dp_aux_init(&mtk_dp->aux);
mtk_dp->aux.name = "aux_mtk_dp";
mtk_dp->aux.transfer = mtk_dp_aux_transfer;
spin_lock_init(&mtk_dp->irq_thread_lock);
ret = devm_request_threaded_irq(dev, irq_num, mtk_dp_hpd_event,
mtk_dp_hpd_event_thread,
IRQ_TYPE_LEVEL_HIGH, dev_name(dev),
mtk_dp);
if (ret)
return dev_err_probe(dev, ret,
"failed to request mediatek dptx irq\n");
mutex_init(&mtk_dp->update_plugged_status_lock);
platform_set_drvdata(pdev, mtk_dp);
if (mtk_dp->data->audio_supported) {
ret = mtk_dp_register_audio_driver(dev);
if (ret) {
dev_err(dev, "Failed to register audio driver: %d\n",
ret);
return ret;
}
}
mtk_dp->phy_dev = platform_device_register_data(dev, "mediatek-dp-phy",
PLATFORM_DEVID_AUTO,
&mtk_dp->regs,
sizeof(struct regmap *));
if (IS_ERR(mtk_dp->phy_dev))
return dev_err_probe(dev, PTR_ERR(mtk_dp->phy_dev),
"Failed to create device mediatek-dp-phy\n");
mtk_dp_get_calibration_data(mtk_dp);
mtk_dp->phy = devm_phy_get(&mtk_dp->phy_dev->dev, "dp");
if (IS_ERR(mtk_dp->phy)) {
platform_device_unregister(mtk_dp->phy_dev);
return dev_err_probe(dev, PTR_ERR(mtk_dp->phy),
"Failed to get phy\n");
}
mtk_dp->bridge.funcs = &mtk_dp_bridge_funcs;
mtk_dp->bridge.of_node = dev->of_node;
mtk_dp->bridge.ops =
DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID | DRM_BRIDGE_OP_HPD;
mtk_dp->bridge.type = mtk_dp->data->bridge_type;
drm_bridge_add(&mtk_dp->bridge);
mtk_dp->need_debounce = true;
timer_setup(&mtk_dp->debounce_timer, mtk_dp_debounce_timer, 0);
pm_runtime_enable(dev);
pm_runtime_get_sync(dev);
return 0;
}
static int mtk_dp_remove(struct platform_device *pdev)
{
struct mtk_dp *mtk_dp = platform_get_drvdata(pdev);
pm_runtime_put(&pdev->dev);
pm_runtime_disable(&pdev->dev);
del_timer_sync(&mtk_dp->debounce_timer);
drm_bridge_remove(&mtk_dp->bridge);
platform_device_unregister(mtk_dp->phy_dev);
if (mtk_dp->audio_pdev)
platform_device_unregister(mtk_dp->audio_pdev);
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int mtk_dp_suspend(struct device *dev)
{
struct mtk_dp *mtk_dp = dev_get_drvdata(dev);
mtk_dp_power_disable(mtk_dp);
mtk_dp_hwirq_enable(mtk_dp, false);
pm_runtime_put_sync(dev);
return 0;
}
static int mtk_dp_resume(struct device *dev)
{
struct mtk_dp *mtk_dp = dev_get_drvdata(dev);
pm_runtime_get_sync(dev);
mtk_dp_init_port(mtk_dp);
mtk_dp_hwirq_enable(mtk_dp, true);
mtk_dp_power_enable(mtk_dp);
return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(mtk_dp_pm_ops, mtk_dp_suspend, mtk_dp_resume);
static const struct mtk_dp_data mt8195_edp_data = {
.bridge_type = DRM_MODE_CONNECTOR_eDP,
.smc_cmd = MTK_DP_SIP_ATF_EDP_VIDEO_UNMUTE,
.efuse_fmt = mt8195_edp_efuse_fmt,
.audio_supported = false,
};
static const struct mtk_dp_data mt8195_dp_data = {
.bridge_type = DRM_MODE_CONNECTOR_DisplayPort,
.smc_cmd = MTK_DP_SIP_ATF_VIDEO_UNMUTE,
.efuse_fmt = mt8195_dp_efuse_fmt,
.audio_supported = true,
};
static const struct of_device_id mtk_dp_of_match[] = {
{
.compatible = "mediatek,mt8195-edp-tx",
.data = &mt8195_edp_data,
},
{
.compatible = "mediatek,mt8195-dp-tx",
.data = &mt8195_dp_data,
},
{},
};
MODULE_DEVICE_TABLE(of, mtk_dp_of_match);
static struct platform_driver mtk_dp_driver = {
.probe = mtk_dp_probe,
.remove = mtk_dp_remove,
.driver = {
.name = "mediatek-drm-dp",
.of_match_table = mtk_dp_of_match,
.pm = &mtk_dp_pm_ops,
},
};
module_platform_driver(mtk_dp_driver);
MODULE_AUTHOR("Jitao Shi <jitao.shi@mediatek.com>");
MODULE_AUTHOR("Markus Schneider-Pargmann <msp@baylibre.com>");
MODULE_AUTHOR("Bo-Chen Chen <rex-bc.chen@mediatek.com>");
MODULE_DESCRIPTION("MediaTek DisplayPort Driver");
MODULE_LICENSE("GPL");