// SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
/*
* Copyright (c) 2020, The Linux Foundation. All rights reserved.
*/
#include <linux/bits.h>
#include <linux/debugfs.h>
#include <linux/delay.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/extcon.h>
#include <linux/fs.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/regulator/consumer.h>
#include <linux/types.h>
#include <linux/wait.h>
#include <crypto/hash.h>
#include <drm/display/drm_dp_helper.h>
#include <drm/display/drm_hdcp_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_print.h>
#include <drm/drm_probe_helper.h>
#include <sound/hdmi-codec.h>
#define REG_IC_VER 0x04
#define REG_RESET_CTRL 0x05
#define VIDEO_RESET BIT(0)
#define AUDIO_RESET BIT(1)
#define ALL_LOGIC_RESET BIT(2)
#define AUX_RESET BIT(3)
#define HDCP_RESET BIT(4)
#define INT_STATUS_01 0x06
#define INT_MASK_01 0x09
#define INT_HPD_CHANGE 0
#define INT_RECEIVE_HPD_IRQ 1
#define INT_SCDT_CHANGE 2
#define INT_HDCP_FAIL 3
#define INT_HDCP_DONE 4
#define BIT_OFFSET(x) (((x) - INT_STATUS_01) * BITS_PER_BYTE)
#define BIT_INT_HPD INT_HPD_CHANGE
#define BIT_INT_HPD_IRQ INT_RECEIVE_HPD_IRQ
#define BIT_INT_SCDT INT_SCDT_CHANGE
#define BIT_INT_HDCP_FAIL INT_HDCP_FAIL
#define BIT_INT_HDCP_DONE INT_HDCP_DONE
#define INT_STATUS_02 0x07
#define INT_MASK_02 0x0A
#define INT_AUX_CMD_FAIL 0
#define INT_HDCP_KSV_CHECK 1
#define INT_AUDIO_FIFO_ERROR 2
#define BIT_INT_AUX_CMD_FAIL (BIT_OFFSET(0x07) + INT_AUX_CMD_FAIL)
#define BIT_INT_HDCP_KSV_CHECK (BIT_OFFSET(0x07) + INT_HDCP_KSV_CHECK)
#define BIT_INT_AUDIO_FIFO_ERROR (BIT_OFFSET(0x07) + INT_AUDIO_FIFO_ERROR)
#define INT_STATUS_03 0x08
#define INT_MASK_03 0x0B
#define INT_LINK_TRAIN_FAIL 4
#define INT_VID_FIFO_ERROR 5
#define INT_IO_LATCH_FIFO_OVERFLOW 7
#define BIT_INT_LINK_TRAIN_FAIL (BIT_OFFSET(0x08) + INT_LINK_TRAIN_FAIL)
#define BIT_INT_VID_FIFO_ERROR (BIT_OFFSET(0x08) + INT_VID_FIFO_ERROR)
#define BIT_INT_IO_FIFO_OVERFLOW (BIT_OFFSET(0x08) + INT_IO_LATCH_FIFO_OVERFLOW)
#define REG_SYSTEM_STS 0x0D
#define INT_STS BIT(0)
#define HPD_STS BIT(1)
#define VIDEO_STB BIT(2)
#define REG_LINK_TRAIN_STS 0x0E
#define LINK_STATE_CR BIT(2)
#define LINK_STATE_EQ BIT(3)
#define LINK_STATE_NORP BIT(4)
#define REG_BANK_SEL 0x0F
#define REG_CLK_CTRL0 0x10
#define M_PCLK_DELAY 0x03
#define REG_AUX_OPT 0x11
#define AUX_AUTO_RST BIT(0)
#define AUX_FIX_FREQ BIT(3)
#define REG_DATA_CTRL0 0x12
#define VIDEO_LATCH_EDGE BIT(4)
#define ENABLE_PCLK_COUNTER BIT(7)
#define REG_PCLK_COUNTER_VALUE 0x13
#define REG_501_FIFO_CTRL 0x15
#define RST_501_FIFO BIT(1)
#define REG_TRAIN_CTRL0 0x16
#define FORCE_LBR BIT(0)
#define LANE_COUNT_MASK 0x06
#define LANE_SWAP BIT(3)
#define SPREAD_AMP_5 BIT(4)
#define FORCE_CR_DONE BIT(5)
#define FORCE_EQ_DONE BIT(6)
#define REG_TRAIN_CTRL1 0x17
#define AUTO_TRAIN BIT(0)
#define MANUAL_TRAIN BIT(1)
#define FORCE_RETRAIN BIT(2)
#define REG_AUX_CTRL 0x23
#define CLR_EDID_FIFO BIT(0)
#define AUX_USER_MODE BIT(1)
#define AUX_NO_SEGMENT_WR BIT(6)
#define AUX_EN_FIFO_READ BIT(7)
#define REG_AUX_ADR_0_7 0x24
#define REG_AUX_ADR_8_15 0x25
#define REG_AUX_ADR_16_19 0x26
#define REG_AUX_OUT_DATA0 0x27
#define REG_AUX_CMD_REQ 0x2B
#define AUX_BUSY BIT(5)
#define REG_AUX_DATA_0_7 0x2C
#define REG_AUX_DATA_8_15 0x2D
#define REG_AUX_DATA_16_23 0x2E
#define REG_AUX_DATA_24_31 0x2F
#define REG_AUX_DATA_FIFO 0x2F
#define REG_AUX_ERROR_STS 0x9F
#define M_AUX_REQ_FAIL 0x03
#define REG_HDCP_CTRL1 0x38
#define HDCP_CP_ENABLE BIT(0)
#define REG_HDCP_TRIGGER 0x39
#define HDCP_TRIGGER_START BIT(0)
#define HDCP_TRIGGER_CPIRQ BIT(1)
#define HDCP_TRIGGER_KSV_DONE BIT(4)
#define HDCP_TRIGGER_KSV_FAIL BIT(5)
#define REG_HDCP_CTRL2 0x3A
#define HDCP_AN_SEL BIT(0)
#define HDCP_AN_GEN BIT(1)
#define HDCP_HW_HPDIRQ_ACT BIT(2)
#define HDCP_EN_M0_READ BIT(5)
#define REG_M0_0_7 0x4C
#define REG_AN_0_7 0x4C
#define REG_SP_CTRL0 0x58
#define REG_IP_CTRL1 0x59
#define REG_IP_CTRL2 0x5A
#define REG_LINK_DRV 0x5C
#define DRV_HS BIT(1)
#define REG_DRV_LN_DATA_SEL 0x5D
#define REG_AUX 0x5E
#define REG_VID_BUS_CTRL0 0x60
#define IN_DDR BIT(2)
#define DDR_CD (0x01 << 6)
#define REG_VID_BUS_CTRL1 0x61
#define TX_FIFO_RESET BIT(1)
#define REG_INPUT_CTRL 0xA0
#define INPUT_HSYNC_POL BIT(0)
#define INPUT_VSYNC_POL BIT(2)
#define INPUT_INTERLACED BIT(4)
#define REG_INPUT_HTOTAL 0xA1
#define REG_INPUT_HACTIVE_START 0xA3
#define REG_INPUT_HACTIVE_WIDTH 0xA5
#define REG_INPUT_HFRONT_PORCH 0xA7
#define REG_INPUT_HSYNC_WIDTH 0xA9
#define REG_INPUT_VTOTAL 0xAB
#define REG_INPUT_VACTIVE_START 0xAD
#define REG_INPUT_VACTIVE_WIDTH 0xAF
#define REG_INPUT_VFRONT_PORCH 0xB1
#define REG_INPUT_VSYNC_WIDTH 0xB3
#define REG_AUDIO_SRC_CTRL 0xB8
#define M_AUDIO_I2S_EN 0x0F
#define EN_I2S0 BIT(0)
#define EN_I2S1 BIT(1)
#define EN_I2S2 BIT(2)
#define EN_I2S3 BIT(3)
#define AUDIO_FIFO_RESET BIT(7)
#define REG_AUDIO_FMT 0xB9
#define REG_AUDIO_FIFO_SEL 0xBA
#define REG_AUDIO_CTRL0 0xBB
#define AUDIO_FULL_PKT BIT(4)
#define AUDIO_16B_BOUND BIT(5)
#define REG_AUDIO_CTRL1 0xBC
#define REG_AUDIO_INPUT_FREQ 0xBE
#define REG_IEC958_STS0 0xBF
#define REG_IEC958_STS1 0xC0
#define REG_IEC958_STS2 0xC1
#define REG_IEC958_STS3 0xC2
#define REG_IEC958_STS4 0xC3
#define REG_HPD_IRQ_TIME 0xC9
#define REG_AUX_DEBUG_MODE 0xCA
#define REG_AUX_OPT2 0xCB
#define REG_HDCP_OPT 0xCE
#define REG_USER_DRV_PRE 0xCF
#define REG_DATA_MUTE_CTRL 0xD3
#define ENABLE_ENHANCED_FRAME BIT(0)
#define ENABLE_AUTO_VIDEO_FIFO_RESET BIT(1)
#define EN_VID_MUTE BIT(4)
#define EN_AUD_MUTE BIT(5)
#define REG_TIME_STMP_CTRL 0xD4
#define EN_ENHANCE_VID_STMP BIT(0)
#define EN_ENHANCE_AUD_STMP BIT(2)
#define M_STAMP_STEP 0x30
#define EN_SSC_GAT BIT(6)
#define REG_INFOFRAME_CTRL 0xE8
#define EN_AVI_PKT BIT(0)
#define EN_AUD_PKT BIT(1)
#define EN_MPG_PKT BIT(2)
#define EN_GEN_PKT BIT(3)
#define EN_VID_TIME_STMP BIT(4)
#define EN_AUD_TIME_STMP BIT(5)
#define EN_VID_CTRL_PKT (EN_AVI_PKT | EN_VID_TIME_STMP)
#define EN_AUD_CTRL_PKT (EN_AUD_PKT | EN_AUD_TIME_STMP)
#define REG_AUDIO_N_0_7 0xDE
#define REG_AUDIO_N_8_15 0xDF
#define REG_AUDIO_N_16_23 0xE0
#define REG_AVI_INFO_DB1 0xE9
#define REG_AVI_INFO_DB2 0xEA
#define REG_AVI_INFO_DB3 0xEB
#define REG_AVI_INFO_DB4 0xEC
#define REG_AVI_INFO_DB5 0xED
#define REG_AVI_INFO_SUM 0xF6
#define REG_AUD_INFOFRAM_DB1 0xF7
#define REG_AUD_INFOFRAM_DB2 0xF8
#define REG_AUD_INFOFRAM_DB3 0xF9
#define REG_AUD_INFOFRAM_DB4 0xFA
#define REG_AUD_INFOFRAM_SUM 0xFB
/* the following six registers are in bank1 */
#define REG_DRV_0_DB_800_MV 0x17E
#define REG_PRE_0_DB_800_MV 0x17F
#define REG_PRE_3P5_DB_800_MV 0x181
#define REG_SSC_CTRL0 0x188
#define REG_SSC_CTRL1 0x189
#define REG_SSC_CTRL2 0x18A
#define RBR DP_LINK_BW_1_62
#define HBR DP_LINK_BW_2_7
#define HBR2 DP_LINK_BW_5_4
#define HBR3 DP_LINK_BW_8_1
#define DPCD_V_1_1 0x11
#define MISC_VERB 0xF0
#define MISC_VERC 0x70
#define I2S_INPUT_FORMAT_STANDARD 0
#define I2S_INPUT_FORMAT_32BIT 1
#define I2S_INPUT_LEFT_JUSTIFIED 0
#define I2S_INPUT_RIGHT_JUSTIFIED 1
#define I2S_DATA_1T_DELAY 0
#define I2S_DATA_NO_DELAY 1
#define I2S_WS_LEFT_CHANNEL 0
#define I2S_WS_RIGHT_CHANNEL 1
#define I2S_DATA_MSB_FIRST 0
#define I2S_DATA_LSB_FIRST 1
#define WORD_LENGTH_16BIT 0
#define WORD_LENGTH_18BIT 1
#define WORD_LENGTH_20BIT 2
#define WORD_LENGTH_24BIT 3
#define DEBUGFS_DIR_NAME "it6505-debugfs"
#define READ_BUFFER_SIZE 400
/* Vendor option */
#define HDCP_DESIRED 1
#define MAX_LANE_COUNT 4
#define MAX_LINK_RATE HBR
#define AUTO_TRAIN_RETRY 3
#define MAX_HDCP_DOWN_STREAM_COUNT 10
#define MAX_CR_LEVEL 0x03
#define MAX_EQ_LEVEL 0x03
#define AUX_WAIT_TIMEOUT_MS 15
#define AUX_FIFO_MAX_SIZE 32
#define PIXEL_CLK_DELAY 1
#define PIXEL_CLK_INVERSE 0
#define ADJUST_PHASE_THRESHOLD 80000
#define DPI_PIXEL_CLK_MAX 95000
#define HDCP_SHA1_FIFO_LEN (MAX_HDCP_DOWN_STREAM_COUNT * 5 + 10)
#define DEFAULT_PWR_ON 0
#define DEFAULT_DRV_HOLD 0
#define AUDIO_SELECT I2S
#define AUDIO_TYPE LPCM
#define AUDIO_SAMPLE_RATE SAMPLE_RATE_48K
#define AUDIO_CHANNEL_COUNT 2
#define I2S_INPUT_FORMAT I2S_INPUT_FORMAT_32BIT
#define I2S_JUSTIFIED I2S_INPUT_LEFT_JUSTIFIED
#define I2S_DATA_DELAY I2S_DATA_1T_DELAY
#define I2S_WS_CHANNEL I2S_WS_LEFT_CHANNEL
#define I2S_DATA_SEQUENCE I2S_DATA_MSB_FIRST
#define AUDIO_WORD_LENGTH WORD_LENGTH_24BIT
enum aux_cmd_type {
CMD_AUX_NATIVE_READ = 0x0,
CMD_AUX_NATIVE_WRITE = 0x5,
CMD_AUX_I2C_EDID_READ = 0xB,
};
enum aux_cmd_reply {
REPLY_ACK,
REPLY_NACK,
REPLY_DEFER,
};
enum link_train_status {
LINK_IDLE,
LINK_BUSY,
LINK_OK,
};
enum hdcp_state {
HDCP_AUTH_IDLE,
HDCP_AUTH_GOING,
HDCP_AUTH_DONE,
};
struct it6505_platform_data {
struct regulator *pwr18;
struct regulator *ovdd;
struct gpio_desc *gpiod_reset;
};
enum it6505_audio_select {
I2S = 0,
SPDIF,
};
enum it6505_audio_sample_rate {
SAMPLE_RATE_24K = 0x6,
SAMPLE_RATE_32K = 0x3,
SAMPLE_RATE_48K = 0x2,
SAMPLE_RATE_96K = 0xA,
SAMPLE_RATE_192K = 0xE,
SAMPLE_RATE_44_1K = 0x0,
SAMPLE_RATE_88_2K = 0x8,
SAMPLE_RATE_176_4K = 0xC,
};
enum it6505_audio_type {
LPCM = 0,
NLPCM,
DSS,
};
struct it6505_audio_data {
enum it6505_audio_select select;
enum it6505_audio_sample_rate sample_rate;
enum it6505_audio_type type;
u8 word_length;
u8 channel_count;
u8 i2s_input_format;
u8 i2s_justified;
u8 i2s_data_delay;
u8 i2s_ws_channel;
u8 i2s_data_sequence;
};
struct it6505_audio_sample_rate_map {
enum it6505_audio_sample_rate rate;
int sample_rate_value;
};
struct it6505_drm_dp_link {
unsigned char revision;
unsigned int rate;
unsigned int num_lanes;
unsigned long capabilities;
};
struct debugfs_entries {
char *name;
const struct file_operations *fops;
};
struct it6505 {
struct drm_dp_aux aux;
struct drm_bridge bridge;
struct device *dev;
struct it6505_drm_dp_link link;
struct it6505_platform_data pdata;
/*
* Mutex protects extcon and interrupt functions from interfering
* each other.
*/
struct mutex extcon_lock;
struct mutex mode_lock; /* used to bridge_detect */
struct mutex aux_lock; /* used to aux data transfers */
struct regmap *regmap;
struct drm_display_mode source_output_mode;
struct drm_display_mode video_info;
struct notifier_block event_nb;
struct extcon_dev *extcon;
struct work_struct extcon_wq;
int extcon_state;
enum drm_connector_status connector_status;
enum link_train_status link_state;
struct work_struct link_works;
u8 dpcd[DP_RECEIVER_CAP_SIZE];
u8 lane_count;
u8 link_rate_bw_code;
u8 sink_count;
bool step_train;
bool branch_device;
bool enable_ssc;
bool lane_swap_disabled;
bool lane_swap;
bool powered;
bool hpd_state;
u32 afe_setting;
u32 max_dpi_pixel_clock;
u32 max_lane_count;
enum hdcp_state hdcp_status;
struct delayed_work hdcp_work;
struct work_struct hdcp_wait_ksv_list;
struct completion extcon_completion;
u8 auto_train_retry;
bool hdcp_desired;
bool is_repeater;
u8 hdcp_down_stream_count;
u8 bksvs[DRM_HDCP_KSV_LEN];
u8 sha1_input[HDCP_SHA1_FIFO_LEN];
bool enable_enhanced_frame;
hdmi_codec_plugged_cb plugged_cb;
struct device *codec_dev;
struct delayed_work delayed_audio;
struct it6505_audio_data audio;
struct dentry *debugfs;
/* it6505 driver hold option */
bool enable_drv_hold;
const struct drm_edid *cached_edid;
int irq;
};
struct it6505_step_train_para {
u8 voltage_swing[MAX_LANE_COUNT];
u8 pre_emphasis[MAX_LANE_COUNT];
};
/*
* Vendor option afe settings for different platforms
* 0: without FPC cable
* 1: with FPC cable
*/
static const u8 afe_setting_table[][3] = {
{0x82, 0x00, 0x45},
{0x93, 0x2A, 0x85}
};
static const struct it6505_audio_sample_rate_map audio_sample_rate_map[] = {
{SAMPLE_RATE_24K, 24000},
{SAMPLE_RATE_32K, 32000},
{SAMPLE_RATE_48K, 48000},
{SAMPLE_RATE_96K, 96000},
{SAMPLE_RATE_192K, 192000},
{SAMPLE_RATE_44_1K, 44100},
{SAMPLE_RATE_88_2K, 88200},
{SAMPLE_RATE_176_4K, 176400},
};
static const struct regmap_range it6505_bridge_volatile_ranges[] = {
{ .range_min = 0, .range_max = 0x1FF },
};
static const struct regmap_access_table it6505_bridge_volatile_table = {
.yes_ranges = it6505_bridge_volatile_ranges,
.n_yes_ranges = ARRAY_SIZE(it6505_bridge_volatile_ranges),
};
static const struct regmap_range_cfg it6505_regmap_banks[] = {
{
.name = "it6505",
.range_min = 0x00,
.range_max = 0x1FF,
.selector_reg = REG_BANK_SEL,
.selector_mask = 0x1,
.selector_shift = 0,
.window_start = 0x00,
.window_len = 0x100,
},
};
static const struct regmap_config it6505_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.volatile_table = &it6505_bridge_volatile_table,
.cache_type = REGCACHE_NONE,
.ranges = it6505_regmap_banks,
.num_ranges = ARRAY_SIZE(it6505_regmap_banks),
.max_register = 0x1FF,
};
static int it6505_read(struct it6505 *it6505, unsigned int reg_addr)
{
unsigned int value;
int err;
struct device *dev = it6505->dev;
if (!it6505->powered)
return -ENODEV;
err = regmap_read(it6505->regmap, reg_addr, &value);
if (err < 0) {
dev_err(dev, "read failed reg[0x%x] err: %d", reg_addr, err);
return err;
}
return value;
}
static int it6505_write(struct it6505 *it6505, unsigned int reg_addr,
unsigned int reg_val)
{
int err;
struct device *dev = it6505->dev;
if (!it6505->powered)
return -ENODEV;
err = regmap_write(it6505->regmap, reg_addr, reg_val);
if (err < 0) {
dev_err(dev, "write failed reg[0x%x] = 0x%x err = %d",
reg_addr, reg_val, err);
return err;
}
return 0;
}
static int it6505_set_bits(struct it6505 *it6505, unsigned int reg,
unsigned int mask, unsigned int value)
{
int err;
struct device *dev = it6505->dev;
if (!it6505->powered)
return -ENODEV;
err = regmap_update_bits(it6505->regmap, reg, mask, value);
if (err < 0) {
dev_err(dev, "write reg[0x%x] = 0x%x mask = 0x%x failed err %d",
reg, value, mask, err);
return err;
}
return 0;
}
static void it6505_debug_print(struct it6505 *it6505, unsigned int reg,
const char *prefix)
{
struct device *dev = it6505->dev;
int val;
if (!drm_debug_enabled(DRM_UT_DRIVER))
return;
val = it6505_read(it6505, reg);
if (val < 0)
DRM_DEV_DEBUG_DRIVER(dev, "%s reg[%02x] read error (%d)",
prefix, reg, val);
else
DRM_DEV_DEBUG_DRIVER(dev, "%s reg[%02x] = 0x%02x", prefix, reg,
val);
}
static int it6505_dpcd_read(struct it6505 *it6505, unsigned long offset)
{
u8 value;
int ret;
struct device *dev = it6505->dev;
ret = drm_dp_dpcd_readb(&it6505->aux, offset, &value);
if (ret < 0) {
dev_err(dev, "DPCD read failed [0x%lx] ret: %d", offset, ret);
return ret;
}
return value;
}
static int it6505_dpcd_write(struct it6505 *it6505, unsigned long offset,
u8 datain)
{
int ret;
struct device *dev = it6505->dev;
ret = drm_dp_dpcd_writeb(&it6505->aux, offset, datain);
if (ret < 0) {
dev_err(dev, "DPCD write failed [0x%lx] ret: %d", offset, ret);
return ret;
}
return 0;
}
static int it6505_get_dpcd(struct it6505 *it6505, int offset, u8 *dpcd, int num)
{
int ret;
struct device *dev = it6505->dev;
ret = drm_dp_dpcd_read(&it6505->aux, offset, dpcd, num);
if (ret < 0)
return ret;
DRM_DEV_DEBUG_DRIVER(dev, "ret = %d DPCD[0x%x] = 0x%*ph", ret, offset,
num, dpcd);
return 0;
}
static void it6505_dump(struct it6505 *it6505)
{
unsigned int i, j;
u8 regs[16];
struct device *dev = it6505->dev;
for (i = 0; i <= 0xff; i += 16) {
for (j = 0; j < 16; j++)
regs[j] = it6505_read(it6505, i + j);
DRM_DEV_DEBUG_DRIVER(dev, "[0x%02x] = %16ph", i, regs);
}
}
static bool it6505_get_sink_hpd_status(struct it6505 *it6505)
{
int reg_0d;
reg_0d = it6505_read(it6505, REG_SYSTEM_STS);
if (reg_0d < 0)
return false;
return reg_0d & HPD_STS;
}
static int it6505_read_word(struct it6505 *it6505, unsigned int reg)
{
int val0, val1;
val0 = it6505_read(it6505, reg);
if (val0 < 0)
return val0;
val1 = it6505_read(it6505, reg + 1);
if (val1 < 0)
return val1;
return (val1 << 8) | val0;
}
static void it6505_calc_video_info(struct it6505 *it6505)
{
struct device *dev = it6505->dev;
int hsync_pol, vsync_pol, interlaced;
int htotal, hdes, hdew, hfph, hsyncw;
int vtotal, vdes, vdew, vfph, vsyncw;
int rddata, i, pclk, sum = 0;
usleep_range(10000, 15000);
rddata = it6505_read(it6505, REG_INPUT_CTRL);
hsync_pol = rddata & INPUT_HSYNC_POL;
vsync_pol = (rddata & INPUT_VSYNC_POL) >> 2;
interlaced = (rddata & INPUT_INTERLACED) >> 4;
htotal = it6505_read_word(it6505, REG_INPUT_HTOTAL) & 0x1FFF;
hdes = it6505_read_word(it6505, REG_INPUT_HACTIVE_START) & 0x1FFF;
hdew = it6505_read_word(it6505, REG_INPUT_HACTIVE_WIDTH) & 0x1FFF;
hfph = it6505_read_word(it6505, REG_INPUT_HFRONT_PORCH) & 0x1FFF;
hsyncw = it6505_read_word(it6505, REG_INPUT_HSYNC_WIDTH) & 0x1FFF;
vtotal = it6505_read_word(it6505, REG_INPUT_VTOTAL) & 0xFFF;
vdes = it6505_read_word(it6505, REG_INPUT_VACTIVE_START) & 0xFFF;
vdew = it6505_read_word(it6505, REG_INPUT_VACTIVE_WIDTH) & 0xFFF;
vfph = it6505_read_word(it6505, REG_INPUT_VFRONT_PORCH) & 0xFFF;
vsyncw = it6505_read_word(it6505, REG_INPUT_VSYNC_WIDTH) & 0xFFF;
DRM_DEV_DEBUG_DRIVER(dev, "hsync_pol:%d, vsync_pol:%d, interlaced:%d",
hsync_pol, vsync_pol, interlaced);
DRM_DEV_DEBUG_DRIVER(dev, "hactive_start:%d, vactive_start:%d",
hdes, vdes);
for (i = 0; i < 3; i++) {
it6505_set_bits(it6505, REG_DATA_CTRL0, ENABLE_PCLK_COUNTER,
ENABLE_PCLK_COUNTER);
usleep_range(10000, 15000);
it6505_set_bits(it6505, REG_DATA_CTRL0, ENABLE_PCLK_COUNTER,
0x00);
rddata = it6505_read_word(it6505, REG_PCLK_COUNTER_VALUE) &
0xFFF;
sum += rddata;
}
if (sum == 0) {
DRM_DEV_DEBUG_DRIVER(dev, "calc video timing error");
return;
}
sum /= 3;
pclk = 13500 * 2048 / sum;
it6505->video_info.clock = pclk;
it6505->video_info.hdisplay = hdew;
it6505->video_info.hsync_start = hdew + hfph;
it6505->video_info.hsync_end = hdew + hfph + hsyncw;
it6505->video_info.htotal = htotal;
it6505->video_info.vdisplay = vdew;
it6505->video_info.vsync_start = vdew + vfph;
it6505->video_info.vsync_end = vdew + vfph + vsyncw;
it6505->video_info.vtotal = vtotal;
DRM_DEV_DEBUG_DRIVER(dev, DRM_MODE_FMT,
DRM_MODE_ARG(&it6505->video_info));
}
static int it6505_drm_dp_link_set_power(struct drm_dp_aux *aux,
struct it6505_drm_dp_link *link,
u8 mode)
{
u8 value;
int err;
/* DP_SET_POWER register is only available on DPCD v1.1 and later */
if (link->revision < DPCD_V_1_1)
return 0;
err = drm_dp_dpcd_readb(aux, DP_SET_POWER, &value);
if (err < 0)
return err;
value &= ~DP_SET_POWER_MASK;
value |= mode;
err = drm_dp_dpcd_writeb(aux, DP_SET_POWER, value);
if (err < 0)
return err;
if (mode == DP_SET_POWER_D0) {
/*
* According to the DP 1.1 specification, a "Sink Device must
* exit the power saving state within 1 ms" (Section 2.5.3.1,
* Table 5-52, "Sink Control Field" (register 0x600).
*/
usleep_range(1000, 2000);
}
return 0;
}
static void it6505_clear_int(struct it6505 *it6505)
{
it6505_write(it6505, INT_STATUS_01, 0xFF);
it6505_write(it6505, INT_STATUS_02, 0xFF);
it6505_write(it6505, INT_STATUS_03, 0xFF);
}
static void it6505_int_mask_enable(struct it6505 *it6505)
{
it6505_write(it6505, INT_MASK_01, BIT(INT_HPD_CHANGE) |
BIT(INT_RECEIVE_HPD_IRQ) | BIT(INT_SCDT_CHANGE) |
BIT(INT_HDCP_FAIL) | BIT(INT_HDCP_DONE));
it6505_write(it6505, INT_MASK_02, BIT(INT_AUX_CMD_FAIL) |
BIT(INT_HDCP_KSV_CHECK) | BIT(INT_AUDIO_FIFO_ERROR));
it6505_write(it6505, INT_MASK_03, BIT(INT_LINK_TRAIN_FAIL) |
BIT(INT_VID_FIFO_ERROR) | BIT(INT_IO_LATCH_FIFO_OVERFLOW));
}
static void it6505_int_mask_disable(struct it6505 *it6505)
{
it6505_write(it6505, INT_MASK_01, 0x00);
it6505_write(it6505, INT_MASK_02, 0x00);
it6505_write(it6505, INT_MASK_03, 0x00);
}
static void it6505_lane_termination_on(struct it6505 *it6505)
{
int regcf;
regcf = it6505_read(it6505, REG_USER_DRV_PRE);
if (regcf == MISC_VERB)
it6505_set_bits(it6505, REG_DRV_LN_DATA_SEL, 0x80, 0x00);
if (regcf == MISC_VERC) {
if (it6505->lane_swap) {
switch (it6505->lane_count) {
case 1:
case 2:
it6505_set_bits(it6505, REG_DRV_LN_DATA_SEL,
0x0C, 0x08);
break;
default:
it6505_set_bits(it6505, REG_DRV_LN_DATA_SEL,
0x0C, 0x0C);
break;
}
} else {
switch (it6505->lane_count) {
case 1:
case 2:
it6505_set_bits(it6505, REG_DRV_LN_DATA_SEL,
0x0C, 0x04);
break;
default:
it6505_set_bits(it6505, REG_DRV_LN_DATA_SEL,
0x0C, 0x0C);
break;
}
}
}
}
static void it6505_lane_termination_off(struct it6505 *it6505)
{
int regcf;
regcf = it6505_read(it6505, REG_USER_DRV_PRE);
if (regcf == MISC_VERB)
it6505_set_bits(it6505, REG_DRV_LN_DATA_SEL, 0x80, 0x80);
if (regcf == MISC_VERC)
it6505_set_bits(it6505, REG_DRV_LN_DATA_SEL, 0x0C, 0x00);
}
static void it6505_lane_power_on(struct it6505 *it6505)
{
it6505_set_bits(it6505, REG_LINK_DRV, 0xF1,
(it6505->lane_swap ?
GENMASK(7, 8 - it6505->lane_count) :
GENMASK(3 + it6505->lane_count, 4)) |
0x01);
}
static void it6505_lane_power_off(struct it6505 *it6505)
{
it6505_set_bits(it6505, REG_LINK_DRV, 0xF0, 0x00);
}
static void it6505_lane_off(struct it6505 *it6505)
{
it6505_lane_power_off(it6505);
it6505_lane_termination_off(it6505);
}
static void it6505_aux_termination_on(struct it6505 *it6505)
{
int regcf;
regcf = it6505_read(it6505, REG_USER_DRV_PRE);
if (regcf == MISC_VERB)
it6505_lane_termination_on(it6505);
if (regcf == MISC_VERC)
it6505_set_bits(it6505, REG_DRV_LN_DATA_SEL, 0x80, 0x80);
}
static void it6505_aux_power_on(struct it6505 *it6505)
{
it6505_set_bits(it6505, REG_AUX, 0x02, 0x02);
}
static void it6505_aux_on(struct it6505 *it6505)
{
it6505_aux_power_on(it6505);
it6505_aux_termination_on(it6505);
}
static void it6505_aux_reset(struct it6505 *it6505)
{
it6505_set_bits(it6505, REG_RESET_CTRL, AUX_RESET, AUX_RESET);
it6505_set_bits(it6505, REG_RESET_CTRL, AUX_RESET, 0x00);
}
static void it6505_reset_logic(struct it6505 *it6505)
{
regmap_write(it6505->regmap, REG_RESET_CTRL, ALL_LOGIC_RESET);
usleep_range(1000, 1500);
}
static bool it6505_aux_op_finished(struct it6505 *it6505)
{
int reg2b = it6505_read(it6505, REG_AUX_CMD_REQ);
if (reg2b < 0)
return false;
return (reg2b & AUX_BUSY) == 0;
}
static int it6505_aux_wait(struct it6505 *it6505)
{
int status;
unsigned long timeout;
struct device *dev = it6505->dev;
timeout = jiffies + msecs_to_jiffies(AUX_WAIT_TIMEOUT_MS) + 1;
while (!it6505_aux_op_finished(it6505)) {
if (time_after(jiffies, timeout)) {
dev_err(dev, "Timed out waiting AUX to finish");
return -ETIMEDOUT;
}
usleep_range(1000, 2000);
}
status = it6505_read(it6505, REG_AUX_ERROR_STS);
if (status < 0) {
dev_err(dev, "Failed to read AUX channel: %d", status);
return status;
}
return 0;
}
static ssize_t it6505_aux_operation(struct it6505 *it6505,
enum aux_cmd_type cmd,
unsigned int address, u8 *buffer,
size_t size, enum aux_cmd_reply *reply)
{
int i, ret;
bool aux_write_check = false;
if (!it6505_get_sink_hpd_status(it6505))
return -EIO;
/* set AUX user mode */
it6505_set_bits(it6505, REG_AUX_CTRL, AUX_USER_MODE, AUX_USER_MODE);
aux_op_start:
if (cmd == CMD_AUX_I2C_EDID_READ) {
/* AUX EDID FIFO has max length of AUX_FIFO_MAX_SIZE bytes. */
size = min_t(size_t, size, AUX_FIFO_MAX_SIZE);
/* Enable AUX FIFO read back and clear FIFO */
it6505_set_bits(it6505, REG_AUX_CTRL,
AUX_EN_FIFO_READ | CLR_EDID_FIFO,
AUX_EN_FIFO_READ | CLR_EDID_FIFO);
it6505_set_bits(it6505, REG_AUX_CTRL,
AUX_EN_FIFO_READ | CLR_EDID_FIFO,
AUX_EN_FIFO_READ);
} else {
/* The DP AUX transmit buffer has 4 bytes. */
size = min_t(size_t, size, 4);
it6505_set_bits(it6505, REG_AUX_CTRL, AUX_NO_SEGMENT_WR,
AUX_NO_SEGMENT_WR);
}
/* Start Address[7:0] */
it6505_write(it6505, REG_AUX_ADR_0_7, (address >> 0) & 0xFF);
/* Start Address[15:8] */
it6505_write(it6505, REG_AUX_ADR_8_15, (address >> 8) & 0xFF);
/* WriteNum[3:0]+StartAdr[19:16] */
it6505_write(it6505, REG_AUX_ADR_16_19,
((address >> 16) & 0x0F) | ((size - 1) << 4));
if (cmd == CMD_AUX_NATIVE_WRITE)
regmap_bulk_write(it6505->regmap, REG_AUX_OUT_DATA0, buffer,
size);
/* Aux Fire */
it6505_write(it6505, REG_AUX_CMD_REQ, cmd);
ret = it6505_aux_wait(it6505);
if (ret < 0)
goto aux_op_err;
ret = it6505_read(it6505, REG_AUX_ERROR_STS);
if (ret < 0)
goto aux_op_err;
switch ((ret >> 6) & 0x3) {
case 0:
*reply = REPLY_ACK;
break;
case 1:
*reply = REPLY_DEFER;
ret = -EAGAIN;
goto aux_op_err;
case 2:
*reply = REPLY_NACK;
ret = -EIO;
goto aux_op_err;
case 3:
ret = -ETIMEDOUT;
goto aux_op_err;
}
/* Read back Native Write data */
if (cmd == CMD_AUX_NATIVE_WRITE) {
aux_write_check = true;
cmd = CMD_AUX_NATIVE_READ;
goto aux_op_start;
}
if (cmd == CMD_AUX_I2C_EDID_READ) {
for (i = 0; i < size; i++) {
ret = it6505_read(it6505, REG_AUX_DATA_FIFO);
if (ret < 0)
goto aux_op_err;
buffer[i] = ret;
}
} else {
for (i = 0; i < size; i++) {
ret = it6505_read(it6505, REG_AUX_DATA_0_7 + i);
if (ret < 0)
goto aux_op_err;
if (aux_write_check && buffer[size - 1 - i] != ret) {
ret = -EINVAL;
goto aux_op_err;
}
buffer[size - 1 - i] = ret;
}
}
ret = i;
aux_op_err:
if (cmd == CMD_AUX_I2C_EDID_READ) {
/* clear AUX FIFO */
it6505_set_bits(it6505, REG_AUX_CTRL,
AUX_EN_FIFO_READ | CLR_EDID_FIFO,
AUX_EN_FIFO_READ | CLR_EDID_FIFO);
it6505_set_bits(it6505, REG_AUX_CTRL,
AUX_EN_FIFO_READ | CLR_EDID_FIFO, 0x00);
}
/* Leave AUX user mode */
it6505_set_bits(it6505, REG_AUX_CTRL, AUX_USER_MODE, 0);
return ret;
}
static ssize_t it6505_aux_do_transfer(struct it6505 *it6505,
enum aux_cmd_type cmd,
unsigned int address, u8 *buffer,
size_t size, enum aux_cmd_reply *reply)
{
int i, ret_size, ret = 0, request_size;
mutex_lock(&it6505->aux_lock);
for (i = 0; i < size; i += 4) {
request_size = min((int)size - i, 4);
ret_size = it6505_aux_operation(it6505, cmd, address + i,
buffer + i, request_size,
reply);
if (ret_size < 0) {
ret = ret_size;
goto aux_op_err;
}
ret += ret_size;
}
aux_op_err:
mutex_unlock(&it6505->aux_lock);
return ret;
}
static ssize_t it6505_aux_transfer(struct drm_dp_aux *aux,
struct drm_dp_aux_msg *msg)
{
struct it6505 *it6505 = container_of(aux, struct it6505, aux);
u8 cmd;
bool is_i2c = !(msg->request & DP_AUX_NATIVE_WRITE);
int ret;
enum aux_cmd_reply reply;
/* IT6505 doesn't support arbitrary I2C read / write. */
if (is_i2c)
return -EINVAL;
switch (msg->request) {
case DP_AUX_NATIVE_READ:
cmd = CMD_AUX_NATIVE_READ;
break;
case DP_AUX_NATIVE_WRITE:
cmd = CMD_AUX_NATIVE_WRITE;
break;
default:
return -EINVAL;
}
ret = it6505_aux_do_transfer(it6505, cmd, msg->address, msg->buffer,
msg->size, &reply);
if (ret < 0)
return ret;
switch (reply) {
case REPLY_ACK:
msg->reply = DP_AUX_NATIVE_REPLY_ACK;
break;
case REPLY_NACK:
msg->reply = DP_AUX_NATIVE_REPLY_NACK;
break;
case REPLY_DEFER:
msg->reply = DP_AUX_NATIVE_REPLY_DEFER;
break;
}
return ret;
}
static int it6505_get_edid_block(void *data, u8 *buf, unsigned int block,
size_t len)
{
struct it6505 *it6505 = data;
struct device *dev = it6505->dev;
enum aux_cmd_reply reply;
int offset, ret, aux_retry = 100;
it6505_aux_reset(it6505);
DRM_DEV_DEBUG_DRIVER(dev, "block number = %d", block);
for (offset = 0; offset < EDID_LENGTH;) {
ret = it6505_aux_do_transfer(it6505, CMD_AUX_I2C_EDID_READ,
block * EDID_LENGTH + offset,
buf + offset, 8, &reply);
if (ret < 0 && ret != -EAGAIN)
return ret;
switch (reply) {
case REPLY_ACK:
DRM_DEV_DEBUG_DRIVER(dev, "[0x%02x]: %8ph", offset,
buf + offset);
offset += 8;
aux_retry = 100;
break;
case REPLY_NACK:
return -EIO;
case REPLY_DEFER:
msleep(20);
if (!(--aux_retry))
return -EIO;
}
}
return 0;
}
static void it6505_variable_config(struct it6505 *it6505)
{
it6505->link_rate_bw_code = HBR;
it6505->lane_count = MAX_LANE_COUNT;
it6505->link_state = LINK_IDLE;
it6505->hdcp_desired = HDCP_DESIRED;
it6505->auto_train_retry = AUTO_TRAIN_RETRY;
it6505->audio.select = AUDIO_SELECT;
it6505->audio.sample_rate = AUDIO_SAMPLE_RATE;
it6505->audio.channel_count = AUDIO_CHANNEL_COUNT;
it6505->audio.type = AUDIO_TYPE;
it6505->audio.i2s_input_format = I2S_INPUT_FORMAT;
it6505->audio.i2s_justified = I2S_JUSTIFIED;
it6505->audio.i2s_data_delay = I2S_DATA_DELAY;
it6505->audio.i2s_ws_channel = I2S_WS_CHANNEL;
it6505->audio.i2s_data_sequence = I2S_DATA_SEQUENCE;
it6505->audio.word_length = AUDIO_WORD_LENGTH;
memset(it6505->sha1_input, 0, sizeof(it6505->sha1_input));
memset(it6505->bksvs, 0, sizeof(it6505->bksvs));
}
static int it6505_send_video_infoframe(struct it6505 *it6505,
struct hdmi_avi_infoframe *frame)
{
u8 buffer[HDMI_INFOFRAME_HEADER_SIZE + HDMI_AVI_INFOFRAME_SIZE];
int err;
struct device *dev = it6505->dev;
err = hdmi_avi_infoframe_pack(frame, buffer, sizeof(buffer));
if (err < 0) {
dev_err(dev, "Failed to pack AVI infoframe: %d", err);
return err;
}
err = it6505_set_bits(it6505, REG_INFOFRAME_CTRL, EN_AVI_PKT, 0x00);
if (err)
return err;
err = regmap_bulk_write(it6505->regmap, REG_AVI_INFO_DB1,
buffer + HDMI_INFOFRAME_HEADER_SIZE,
frame->length);
if (err)
return err;
err = it6505_set_bits(it6505, REG_INFOFRAME_CTRL, EN_AVI_PKT,
EN_AVI_PKT);
if (err)
return err;
return 0;
}
static void it6505_get_extcon_property(struct it6505 *it6505)
{
int err;
union extcon_property_value property;
struct device *dev = it6505->dev;
if (it6505->extcon && !it6505->lane_swap_disabled) {
err = extcon_get_property(it6505->extcon, EXTCON_DISP_DP,
EXTCON_PROP_USB_TYPEC_POLARITY,
&property);
if (err) {
dev_err(dev, "get property fail!");
return;
}
it6505->lane_swap = property.intval;
}
}
static void it6505_clk_phase_adjustment(struct it6505 *it6505,
const struct drm_display_mode *mode)
{
int clock = mode->clock;
it6505_set_bits(it6505, REG_CLK_CTRL0, M_PCLK_DELAY,
clock < ADJUST_PHASE_THRESHOLD ? PIXEL_CLK_DELAY : 0);
it6505_set_bits(it6505, REG_DATA_CTRL0, VIDEO_LATCH_EDGE,
PIXEL_CLK_INVERSE << 4);
}
static void it6505_link_reset_step_train(struct it6505 *it6505)
{
it6505_set_bits(it6505, REG_TRAIN_CTRL0,
FORCE_CR_DONE | FORCE_EQ_DONE, 0x00);
it6505_dpcd_write(it6505, DP_TRAINING_PATTERN_SET,
DP_TRAINING_PATTERN_DISABLE);
}
static void it6505_init(struct it6505 *it6505)
{
it6505_write(it6505, REG_AUX_OPT, AUX_AUTO_RST | AUX_FIX_FREQ);
it6505_write(it6505, REG_AUX_CTRL, AUX_NO_SEGMENT_WR);
it6505_write(it6505, REG_HDCP_CTRL2, HDCP_AN_SEL | HDCP_HW_HPDIRQ_ACT);
it6505_write(it6505, REG_VID_BUS_CTRL0, IN_DDR | DDR_CD);
it6505_write(it6505, REG_VID_BUS_CTRL1, 0x01);
it6505_write(it6505, REG_AUDIO_CTRL0, AUDIO_16B_BOUND);
/* chip internal setting, don't modify */
it6505_write(it6505, REG_HPD_IRQ_TIME, 0xF5);
it6505_write(it6505, REG_AUX_DEBUG_MODE, 0x4D);
it6505_write(it6505, REG_AUX_OPT2, 0x17);
it6505_write(it6505, REG_HDCP_OPT, 0x60);
it6505_write(it6505, REG_DATA_MUTE_CTRL,
EN_VID_MUTE | EN_AUD_MUTE | ENABLE_AUTO_VIDEO_FIFO_RESET);
it6505_write(it6505, REG_TIME_STMP_CTRL,
EN_SSC_GAT | EN_ENHANCE_VID_STMP | EN_ENHANCE_AUD_STMP);
it6505_write(it6505, REG_INFOFRAME_CTRL, 0x00);
it6505_write(it6505, REG_DRV_0_DB_800_MV,
afe_setting_table[it6505->afe_setting][0]);
it6505_write(it6505, REG_PRE_0_DB_800_MV,
afe_setting_table[it6505->afe_setting][1]);
it6505_write(it6505, REG_PRE_3P5_DB_800_MV,
afe_setting_table[it6505->afe_setting][2]);
it6505_write(it6505, REG_SSC_CTRL0, 0x9E);
it6505_write(it6505, REG_SSC_CTRL1, 0x1C);
it6505_write(it6505, REG_SSC_CTRL2, 0x42);
}
static void it6505_video_disable(struct it6505 *it6505)
{
it6505_set_bits(it6505, REG_DATA_MUTE_CTRL, EN_VID_MUTE, EN_VID_MUTE);
it6505_set_bits(it6505, REG_INFOFRAME_CTRL, EN_VID_CTRL_PKT, 0x00);
it6505_set_bits(it6505, REG_RESET_CTRL, VIDEO_RESET, VIDEO_RESET);
}
static void it6505_video_reset(struct it6505 *it6505)
{
it6505_link_reset_step_train(it6505);
it6505_set_bits(it6505, REG_DATA_MUTE_CTRL, EN_VID_MUTE, EN_VID_MUTE);
it6505_set_bits(it6505, REG_INFOFRAME_CTRL, EN_VID_CTRL_PKT, 0x00);
it6505_set_bits(it6505, REG_VID_BUS_CTRL1, TX_FIFO_RESET, TX_FIFO_RESET);
it6505_set_bits(it6505, REG_VID_BUS_CTRL1, TX_FIFO_RESET, 0x00);
it6505_set_bits(it6505, REG_501_FIFO_CTRL, RST_501_FIFO, RST_501_FIFO);
it6505_set_bits(it6505, REG_501_FIFO_CTRL, RST_501_FIFO, 0x00);
it6505_set_bits(it6505, REG_RESET_CTRL, VIDEO_RESET, VIDEO_RESET);
usleep_range(1000, 2000);
it6505_set_bits(it6505, REG_RESET_CTRL, VIDEO_RESET, 0x00);
}
static void it6505_update_video_parameter(struct it6505 *it6505,
const struct drm_display_mode *mode)
{
it6505_clk_phase_adjustment(it6505, mode);
it6505_video_disable(it6505);
}
static bool it6505_audio_input(struct it6505 *it6505)
{
int reg05, regbe;
reg05 = it6505_read(it6505, REG_RESET_CTRL);
it6505_set_bits(it6505, REG_RESET_CTRL, AUDIO_RESET, 0x00);
usleep_range(3000, 4000);
regbe = it6505_read(it6505, REG_AUDIO_INPUT_FREQ);
it6505_write(it6505, REG_RESET_CTRL, reg05);
return regbe != 0xFF;
}
static void it6505_setup_audio_channel_status(struct it6505 *it6505)
{
enum it6505_audio_sample_rate sample_rate = it6505->audio.sample_rate;
u8 audio_word_length_map[] = { 0x02, 0x04, 0x03, 0x0B };
/* Channel Status */
it6505_write(it6505, REG_IEC958_STS0, it6505->audio.type << 1);
it6505_write(it6505, REG_IEC958_STS1, 0x00);
it6505_write(it6505, REG_IEC958_STS2, 0x00);
it6505_write(it6505, REG_IEC958_STS3, sample_rate);
it6505_write(it6505, REG_IEC958_STS4, (~sample_rate << 4) |
audio_word_length_map[it6505->audio.word_length]);
}
static void it6505_setup_audio_format(struct it6505 *it6505)
{
/* I2S MODE */
it6505_write(it6505, REG_AUDIO_FMT,
(it6505->audio.word_length << 5) |
(it6505->audio.i2s_data_sequence << 4) |
(it6505->audio.i2s_ws_channel << 3) |
(it6505->audio.i2s_data_delay << 2) |
(it6505->audio.i2s_justified << 1) |
it6505->audio.i2s_input_format);
if (it6505->audio.select == SPDIF) {
it6505_write(it6505, REG_AUDIO_FIFO_SEL, 0x00);
/* 0x30 = 128*FS */
it6505_set_bits(it6505, REG_AUX_OPT, 0xF0, 0x30);
} else {
it6505_write(it6505, REG_AUDIO_FIFO_SEL, 0xE4);
}
it6505_write(it6505, REG_AUDIO_CTRL0, 0x20);
it6505_write(it6505, REG_AUDIO_CTRL1, 0x00);
}
static void it6505_enable_audio_source(struct it6505 *it6505)
{
unsigned int audio_source_count;
audio_source_count = BIT(DIV_ROUND_UP(it6505->audio.channel_count, 2))
- 1;
audio_source_count |= it6505->audio.select << 4;
it6505_write(it6505, REG_AUDIO_SRC_CTRL, audio_source_count);
}
static void it6505_enable_audio_infoframe(struct it6505 *it6505)
{
struct device *dev = it6505->dev;
u8 audio_info_ca[] = { 0x00, 0x00, 0x01, 0x03, 0x07, 0x0B, 0x0F, 0x1F };
DRM_DEV_DEBUG_DRIVER(dev, "infoframe channel_allocation:0x%02x",
audio_info_ca[it6505->audio.channel_count - 1]);
it6505_write(it6505, REG_AUD_INFOFRAM_DB1, it6505->audio.channel_count
- 1);
it6505_write(it6505, REG_AUD_INFOFRAM_DB2, 0x00);
it6505_write(it6505, REG_AUD_INFOFRAM_DB3,
audio_info_ca[it6505->audio.channel_count - 1]);
it6505_write(it6505, REG_AUD_INFOFRAM_DB4, 0x00);
it6505_write(it6505, REG_AUD_INFOFRAM_SUM, 0x00);
/* Enable Audio InfoFrame */
it6505_set_bits(it6505, REG_INFOFRAME_CTRL, EN_AUD_CTRL_PKT,
EN_AUD_CTRL_PKT);
}
static void it6505_disable_audio(struct it6505 *it6505)
{
it6505_set_bits(it6505, REG_DATA_MUTE_CTRL, EN_AUD_MUTE, EN_AUD_MUTE);
it6505_set_bits(it6505, REG_AUDIO_SRC_CTRL, M_AUDIO_I2S_EN, 0x00);
it6505_set_bits(it6505, REG_INFOFRAME_CTRL, EN_AUD_CTRL_PKT, 0x00);
it6505_set_bits(it6505, REG_RESET_CTRL, AUDIO_RESET, AUDIO_RESET);
}
static void it6505_enable_audio(struct it6505 *it6505)
{
struct device *dev = it6505->dev;
int regbe;
DRM_DEV_DEBUG_DRIVER(dev, "start");
it6505_disable_audio(it6505);
it6505_setup_audio_channel_status(it6505);
it6505_setup_audio_format(it6505);
it6505_enable_audio_source(it6505);
it6505_enable_audio_infoframe(it6505);
it6505_write(it6505, REG_AUDIO_N_0_7, 0x00);
it6505_write(it6505, REG_AUDIO_N_8_15, 0x80);
it6505_write(it6505, REG_AUDIO_N_16_23, 0x00);
it6505_set_bits(it6505, REG_AUDIO_SRC_CTRL, AUDIO_FIFO_RESET,
AUDIO_FIFO_RESET);
it6505_set_bits(it6505, REG_AUDIO_SRC_CTRL, AUDIO_FIFO_RESET, 0x00);
it6505_set_bits(it6505, REG_RESET_CTRL, AUDIO_RESET, 0x00);
regbe = it6505_read(it6505, REG_AUDIO_INPUT_FREQ);
DRM_DEV_DEBUG_DRIVER(dev, "regbe:0x%02x audio input fs: %d.%d kHz",
regbe, 6750 / regbe, (6750 % regbe) * 10 / regbe);
it6505_set_bits(it6505, REG_DATA_MUTE_CTRL, EN_AUD_MUTE, 0x00);
}
static bool it6505_use_step_train_check(struct it6505 *it6505)
{
if (it6505->link.revision >= 0x12)
return it6505->dpcd[DP_TRAINING_AUX_RD_INTERVAL] >= 0x01;
return true;
}
static void it6505_parse_link_capabilities(struct it6505 *it6505)
{
struct device *dev = it6505->dev;
struct it6505_drm_dp_link *link = &it6505->link;
int bcaps;
if (it6505->dpcd[0] == 0) {
dev_err(dev, "DPCD is not initialized");
return;
}
memset(link, 0, sizeof(*link));
link->revision = it6505->dpcd[0];
link->rate = drm_dp_bw_code_to_link_rate(it6505->dpcd[1]);
link->num_lanes = it6505->dpcd[2] & DP_MAX_LANE_COUNT_MASK;
if (it6505->dpcd[2] & DP_ENHANCED_FRAME_CAP)
link->capabilities = DP_ENHANCED_FRAME_CAP;
DRM_DEV_DEBUG_DRIVER(dev, "DPCD Rev.: %d.%d",
link->revision >> 4, link->revision & 0x0F);
DRM_DEV_DEBUG_DRIVER(dev, "Sink max link rate: %d.%02d Gbps per lane",
link->rate / 100000, link->rate / 1000 % 100);
it6505->link_rate_bw_code = drm_dp_link_rate_to_bw_code(link->rate);
DRM_DEV_DEBUG_DRIVER(dev, "link rate bw code:0x%02x",
it6505->link_rate_bw_code);
it6505->link_rate_bw_code = min_t(int, it6505->link_rate_bw_code,
MAX_LINK_RATE);
it6505->lane_count = link->num_lanes;
DRM_DEV_DEBUG_DRIVER(dev, "Sink support %d lanes training",
it6505->lane_count);
it6505->lane_count = min_t(int, it6505->lane_count,
it6505->max_lane_count);
it6505->branch_device = drm_dp_is_branch(it6505->dpcd);
DRM_DEV_DEBUG_DRIVER(dev, "Sink %sbranch device",
it6505->branch_device ? "" : "Not ");
it6505->enable_enhanced_frame = link->capabilities;
DRM_DEV_DEBUG_DRIVER(dev, "Sink %sSupport Enhanced Framing",
it6505->enable_enhanced_frame ? "" : "Not ");
it6505->enable_ssc = (it6505->dpcd[DP_MAX_DOWNSPREAD] &
DP_MAX_DOWNSPREAD_0_5);
DRM_DEV_DEBUG_DRIVER(dev, "Maximum Down-Spread: %s, %ssupport SSC!",
it6505->enable_ssc ? "0.5" : "0",
it6505->enable_ssc ? "" : "Not ");
it6505->step_train = it6505_use_step_train_check(it6505);
if (it6505->step_train)
DRM_DEV_DEBUG_DRIVER(dev, "auto train fail, will step train");
bcaps = it6505_dpcd_read(it6505, DP_AUX_HDCP_BCAPS);
DRM_DEV_DEBUG_DRIVER(dev, "bcaps:0x%02x", bcaps);
if (bcaps & DP_BCAPS_HDCP_CAPABLE) {
it6505->is_repeater = (bcaps & DP_BCAPS_REPEATER_PRESENT);
DRM_DEV_DEBUG_DRIVER(dev, "Support HDCP! Downstream is %s!",
it6505->is_repeater ? "repeater" :
"receiver");
} else {
DRM_DEV_DEBUG_DRIVER(dev, "Sink not support HDCP!");
it6505->hdcp_desired = false;
}
DRM_DEV_DEBUG_DRIVER(dev, "HDCP %s",
it6505->hdcp_desired ? "desired" : "undesired");
}
static void it6505_setup_ssc(struct it6505 *it6505)
{
it6505_set_bits(it6505, REG_TRAIN_CTRL0, SPREAD_AMP_5,
it6505->enable_ssc ? SPREAD_AMP_5 : 0x00);
if (it6505->enable_ssc) {
it6505_write(it6505, REG_SSC_CTRL0, 0x9E);
it6505_write(it6505, REG_SSC_CTRL1, 0x1C);
it6505_write(it6505, REG_SSC_CTRL2, 0x42);
it6505_write(it6505, REG_SP_CTRL0, 0x07);
it6505_write(it6505, REG_IP_CTRL1, 0x29);
it6505_write(it6505, REG_IP_CTRL2, 0x03);
/* Stamp Interrupt Step */
it6505_set_bits(it6505, REG_TIME_STMP_CTRL, M_STAMP_STEP,
0x10);
it6505_dpcd_write(it6505, DP_DOWNSPREAD_CTRL,
DP_SPREAD_AMP_0_5);
} else {
it6505_dpcd_write(it6505, DP_DOWNSPREAD_CTRL, 0x00);
it6505_set_bits(it6505, REG_TIME_STMP_CTRL, M_STAMP_STEP,
0x00);
}
}
static inline void it6505_link_rate_setup(struct it6505 *it6505)
{
it6505_set_bits(it6505, REG_TRAIN_CTRL0, FORCE_LBR,
(it6505->link_rate_bw_code == RBR) ? FORCE_LBR : 0x00);
it6505_set_bits(it6505, REG_LINK_DRV, DRV_HS,
(it6505->link_rate_bw_code == RBR) ? 0x00 : DRV_HS);
}
static void it6505_lane_count_setup(struct it6505 *it6505)
{
it6505_get_extcon_property(it6505);
it6505_set_bits(it6505, REG_TRAIN_CTRL0, LANE_SWAP,
it6505->lane_swap ? LANE_SWAP : 0x00);
it6505_set_bits(it6505, REG_TRAIN_CTRL0, LANE_COUNT_MASK,
(it6505->lane_count - 1) << 1);
}
static void it6505_link_training_setup(struct it6505 *it6505)
{
struct device *dev = it6505->dev;
if (it6505->enable_enhanced_frame)
it6505_set_bits(it6505, REG_DATA_MUTE_CTRL,
ENABLE_ENHANCED_FRAME, ENABLE_ENHANCED_FRAME);
it6505_link_rate_setup(it6505);
it6505_lane_count_setup(it6505);
it6505_setup_ssc(it6505);
DRM_DEV_DEBUG_DRIVER(dev,
"%s, %d lanes, %sable ssc, %sable enhanced frame",
it6505->link_rate_bw_code != RBR ? "HBR" : "RBR",
it6505->lane_count,
it6505->enable_ssc ? "en" : "dis",
it6505->enable_enhanced_frame ? "en" : "dis");
}
static bool it6505_link_start_auto_train(struct it6505 *it6505)
{
int timeout = 500, link_training_state;
bool state = false;
mutex_lock(&it6505->aux_lock);
it6505_set_bits(it6505, REG_TRAIN_CTRL0,
FORCE_CR_DONE | FORCE_EQ_DONE, 0x00);
it6505_write(it6505, REG_TRAIN_CTRL1, FORCE_RETRAIN);
it6505_write(it6505, REG_TRAIN_CTRL1, AUTO_TRAIN);
while (timeout > 0) {
usleep_range(1000, 2000);
link_training_state = it6505_read(it6505, REG_LINK_TRAIN_STS);
if (link_training_state > 0 &&
(link_training_state & LINK_STATE_NORP)) {
state = true;
goto unlock;
}
timeout--;
}
unlock:
mutex_unlock(&it6505->aux_lock);
return state;
}
static int it6505_drm_dp_link_configure(struct it6505 *it6505)
{
u8 values[2];
int err;
struct drm_dp_aux *aux = &it6505->aux;
values[0] = it6505->link_rate_bw_code;
values[1] = it6505->lane_count;
if (it6505->enable_enhanced_frame)
values[1] |= DP_LANE_COUNT_ENHANCED_FRAME_EN;
err = drm_dp_dpcd_write(aux, DP_LINK_BW_SET, values, sizeof(values));
if (err < 0)
return err;
return 0;
}
static bool it6505_check_voltage_swing_max(u8 lane_voltage_swing_pre_emphasis)
{
return ((lane_voltage_swing_pre_emphasis & 0x03) == MAX_CR_LEVEL);
}
static bool it6505_check_pre_emphasis_max(u8 lane_voltage_swing_pre_emphasis)
{
return ((lane_voltage_swing_pre_emphasis & 0x03) == MAX_EQ_LEVEL);
}
static bool it6505_check_max_voltage_swing_reached(u8 *lane_voltage_swing,
u8 lane_count)
{
u8 i;
for (i = 0; i < lane_count; i++) {
if (lane_voltage_swing[i] & DP_TRAIN_MAX_SWING_REACHED)
return true;
}
return false;
}
static bool
step_train_lane_voltage_para_set(struct it6505 *it6505,
struct it6505_step_train_para
*lane_voltage_pre_emphasis,
u8 *lane_voltage_pre_emphasis_set)
{
u8 *voltage_swing = lane_voltage_pre_emphasis->voltage_swing;
u8 *pre_emphasis = lane_voltage_pre_emphasis->pre_emphasis;
u8 i;
for (i = 0; i < it6505->lane_count; i++) {
voltage_swing[i] &= 0x03;
lane_voltage_pre_emphasis_set[i] = voltage_swing[i];
if (it6505_check_voltage_swing_max(voltage_swing[i]))
lane_voltage_pre_emphasis_set[i] |=
DP_TRAIN_MAX_SWING_REACHED;
pre_emphasis[i] &= 0x03;
lane_voltage_pre_emphasis_set[i] |= pre_emphasis[i]
<< DP_TRAIN_PRE_EMPHASIS_SHIFT;
if (it6505_check_pre_emphasis_max(pre_emphasis[i]))
lane_voltage_pre_emphasis_set[i] |=
DP_TRAIN_MAX_PRE_EMPHASIS_REACHED;
it6505_dpcd_write(it6505, DP_TRAINING_LANE0_SET + i,
lane_voltage_pre_emphasis_set[i]);
if (lane_voltage_pre_emphasis_set[i] !=
it6505_dpcd_read(it6505, DP_TRAINING_LANE0_SET + i))
return false;
}
return true;
}
static bool
it6505_step_cr_train(struct it6505 *it6505,
struct it6505_step_train_para *lane_voltage_pre_emphasis)
{
u8 loop_count = 0, i = 0, j;
u8 link_status[DP_LINK_STATUS_SIZE] = { 0 };
u8 lane_level_config[MAX_LANE_COUNT] = { 0 };
int pre_emphasis_adjust = -1, voltage_swing_adjust = -1;
const struct drm_dp_aux *aux = &it6505->aux;
it6505_dpcd_write(it6505, DP_DOWNSPREAD_CTRL,
it6505->enable_ssc ? DP_SPREAD_AMP_0_5 : 0x00);
it6505_dpcd_write(it6505, DP_TRAINING_PATTERN_SET,
DP_TRAINING_PATTERN_1);
while (loop_count < 5 && i < 10) {
i++;
if (!step_train_lane_voltage_para_set(it6505,
lane_voltage_pre_emphasis,
lane_level_config))
continue;
drm_dp_link_train_clock_recovery_delay(aux, it6505->dpcd);
drm_dp_dpcd_read_link_status(&it6505->aux, link_status);
if (drm_dp_clock_recovery_ok(link_status, it6505->lane_count)) {
it6505_set_bits(it6505, REG_TRAIN_CTRL0, FORCE_CR_DONE,
FORCE_CR_DONE);
return true;
}
DRM_DEV_DEBUG_DRIVER(it6505->dev, "cr not done");
if (it6505_check_max_voltage_swing_reached(lane_level_config,
it6505->lane_count))
goto cr_train_fail;
for (j = 0; j < it6505->lane_count; j++) {
lane_voltage_pre_emphasis->voltage_swing[j] =
drm_dp_get_adjust_request_voltage(link_status,
j) >>
DP_TRAIN_VOLTAGE_SWING_SHIFT;
lane_voltage_pre_emphasis->pre_emphasis[j] =
drm_dp_get_adjust_request_pre_emphasis(link_status,
j) >>
DP_TRAIN_PRE_EMPHASIS_SHIFT;
if (voltage_swing_adjust ==
lane_voltage_pre_emphasis->voltage_swing[j] &&
pre_emphasis_adjust ==
lane_voltage_pre_emphasis->pre_emphasis[j]) {
loop_count++;
continue;
}
voltage_swing_adjust =
lane_voltage_pre_emphasis->voltage_swing[j];
pre_emphasis_adjust =
lane_voltage_pre_emphasis->pre_emphasis[j];
loop_count = 0;
if (voltage_swing_adjust + pre_emphasis_adjust >
MAX_EQ_LEVEL)
lane_voltage_pre_emphasis->voltage_swing[j] =
MAX_EQ_LEVEL -
lane_voltage_pre_emphasis
->pre_emphasis[j];
}
}
cr_train_fail:
it6505_dpcd_write(it6505, DP_TRAINING_PATTERN_SET,
DP_TRAINING_PATTERN_DISABLE);
return false;
}
static bool
it6505_step_eq_train(struct it6505 *it6505,
struct it6505_step_train_para *lane_voltage_pre_emphasis)
{
u8 loop_count = 0, i, link_status[DP_LINK_STATUS_SIZE] = { 0 };
u8 lane_level_config[MAX_LANE_COUNT] = { 0 };
const struct drm_dp_aux *aux = &it6505->aux;
it6505_dpcd_write(it6505, DP_TRAINING_PATTERN_SET,
DP_TRAINING_PATTERN_2);
while (loop_count < 6) {
loop_count++;
if (!step_train_lane_voltage_para_set(it6505,
lane_voltage_pre_emphasis,
lane_level_config))
continue;
drm_dp_link_train_channel_eq_delay(aux, it6505->dpcd);
drm_dp_dpcd_read_link_status(&it6505->aux, link_status);
if (!drm_dp_clock_recovery_ok(link_status, it6505->lane_count))
goto eq_train_fail;
if (drm_dp_channel_eq_ok(link_status, it6505->lane_count)) {
it6505_dpcd_write(it6505, DP_TRAINING_PATTERN_SET,
DP_TRAINING_PATTERN_DISABLE);
it6505_set_bits(it6505, REG_TRAIN_CTRL0, FORCE_EQ_DONE,
FORCE_EQ_DONE);
return true;
}
DRM_DEV_DEBUG_DRIVER(it6505->dev, "eq not done");
for (i = 0; i < it6505->lane_count; i++) {
lane_voltage_pre_emphasis->voltage_swing[i] =
drm_dp_get_adjust_request_voltage(link_status,
i) >>
DP_TRAIN_VOLTAGE_SWING_SHIFT;
lane_voltage_pre_emphasis->pre_emphasis[i] =
drm_dp_get_adjust_request_pre_emphasis(link_status,
i) >>
DP_TRAIN_PRE_EMPHASIS_SHIFT;
if (lane_voltage_pre_emphasis->voltage_swing[i] +
lane_voltage_pre_emphasis->pre_emphasis[i] >
MAX_EQ_LEVEL)
lane_voltage_pre_emphasis->voltage_swing[i] =
0x03 - lane_voltage_pre_emphasis
->pre_emphasis[i];
}
}
eq_train_fail:
it6505_dpcd_write(it6505, DP_TRAINING_PATTERN_SET,
DP_TRAINING_PATTERN_DISABLE);
return false;
}
static bool it6505_link_start_step_train(struct it6505 *it6505)
{
int err;
struct it6505_step_train_para lane_voltage_pre_emphasis = {
.voltage_swing = { 0 },
.pre_emphasis = { 0 },
};
DRM_DEV_DEBUG_DRIVER(it6505->dev, "start");
err = it6505_drm_dp_link_configure(it6505);
if (err < 0)
return false;
if (!it6505_step_cr_train(it6505, &lane_voltage_pre_emphasis))
return false;
if (!it6505_step_eq_train(it6505, &lane_voltage_pre_emphasis))
return false;
return true;
}
static bool it6505_get_video_status(struct it6505 *it6505)
{
int reg_0d;
reg_0d = it6505_read(it6505, REG_SYSTEM_STS);
if (reg_0d < 0)
return false;
return reg_0d & VIDEO_STB;
}
static void it6505_reset_hdcp(struct it6505 *it6505)
{
it6505->hdcp_status = HDCP_AUTH_IDLE;
/* Disable CP_Desired */
it6505_set_bits(it6505, REG_HDCP_CTRL1, HDCP_CP_ENABLE, 0x00);
it6505_set_bits(it6505, REG_RESET_CTRL, HDCP_RESET, HDCP_RESET);
}
static void it6505_start_hdcp(struct it6505 *it6505)
{
struct device *dev = it6505->dev;
DRM_DEV_DEBUG_DRIVER(dev, "start");
it6505_reset_hdcp(it6505);
queue_delayed_work(system_wq, &it6505->hdcp_work,
msecs_to_jiffies(2400));
}
static void it6505_stop_hdcp(struct it6505 *it6505)
{
it6505_reset_hdcp(it6505);
cancel_delayed_work(&it6505->hdcp_work);
}
static bool it6505_hdcp_is_ksv_valid(u8 *ksv)
{
int i, ones = 0;
/* KSV has 20 1's and 20 0's */
for (i = 0; i < DRM_HDCP_KSV_LEN; i++)
ones += hweight8(ksv[i]);
if (ones != 20)
return false;
return true;
}
static void it6505_hdcp_part1_auth(struct it6505 *it6505)
{
struct device *dev = it6505->dev;
u8 hdcp_bcaps;
it6505_set_bits(it6505, REG_RESET_CTRL, HDCP_RESET, 0x00);
/* Disable CP_Desired */
it6505_set_bits(it6505, REG_HDCP_CTRL1, HDCP_CP_ENABLE, 0x00);
usleep_range(1000, 1500);
hdcp_bcaps = it6505_dpcd_read(it6505, DP_AUX_HDCP_BCAPS);
DRM_DEV_DEBUG_DRIVER(dev, "DPCD[0x68028]: 0x%02x",
hdcp_bcaps);
if (!hdcp_bcaps)
return;
/* clear the repeater List Chk Done and fail bit */
it6505_set_bits(it6505, REG_HDCP_TRIGGER,
HDCP_TRIGGER_KSV_DONE | HDCP_TRIGGER_KSV_FAIL,
0x00);
/* Enable An Generator */
it6505_set_bits(it6505, REG_HDCP_CTRL2, HDCP_AN_GEN, HDCP_AN_GEN);
/* delay1ms(10);*/
usleep_range(10000, 15000);
/* Stop An Generator */
it6505_set_bits(it6505, REG_HDCP_CTRL2, HDCP_AN_GEN, 0x00);
it6505_set_bits(it6505, REG_HDCP_CTRL1, HDCP_CP_ENABLE, HDCP_CP_ENABLE);
it6505_set_bits(it6505, REG_HDCP_TRIGGER, HDCP_TRIGGER_START,
HDCP_TRIGGER_START);
it6505->hdcp_status = HDCP_AUTH_GOING;
}
static int it6505_sha1_digest(struct it6505 *it6505, u8 *sha1_input,
unsigned int size, u8 *output_av)
{
struct shash_desc *desc;
struct crypto_shash *tfm;
int err;
struct device *dev = it6505->dev;
tfm = crypto_alloc_shash("sha1", 0, 0);
if (IS_ERR(tfm)) {
dev_err(dev, "crypto_alloc_shash sha1 failed");
return PTR_ERR(tfm);
}
desc = kzalloc(sizeof(*desc) + crypto_shash_descsize(tfm), GFP_KERNEL);
if (!desc) {
crypto_free_shash(tfm);
return -ENOMEM;
}
desc->tfm = tfm;
err = crypto_shash_digest(desc, sha1_input, size, output_av);
if (err)
dev_err(dev, "crypto_shash_digest sha1 failed");
crypto_free_shash(tfm);
kfree(desc);
return err;
}
static int it6505_setup_sha1_input(struct it6505 *it6505, u8 *sha1_input)
{
struct device *dev = it6505->dev;
u8 binfo[2];
int down_stream_count, i, err, msg_count = 0;
err = it6505_get_dpcd(it6505, DP_AUX_HDCP_BINFO, binfo,
ARRAY_SIZE(binfo));
if (err < 0) {
dev_err(dev, "Read binfo value Fail");
return err;
}
down_stream_count = binfo[0] & 0x7F;
DRM_DEV_DEBUG_DRIVER(dev, "binfo:0x%*ph", (int)ARRAY_SIZE(binfo),
binfo);
if ((binfo[0] & BIT(7)) || (binfo[1] & BIT(3))) {
dev_err(dev, "HDCP max cascade device exceed");
return 0;
}
if (!down_stream_count ||
down_stream_count > MAX_HDCP_DOWN_STREAM_COUNT) {
dev_err(dev, "HDCP down stream count Error %d",
down_stream_count);
return 0;
}
for (i = 0; i < down_stream_count; i++) {
err = it6505_get_dpcd(it6505, DP_AUX_HDCP_KSV_FIFO +
(i % 3) * DRM_HDCP_KSV_LEN,
sha1_input + msg_count,
DRM_HDCP_KSV_LEN);
if (err < 0)
return err;
msg_count += 5;
}
it6505->hdcp_down_stream_count = down_stream_count;
sha1_input[msg_count++] = binfo[0];
sha1_input[msg_count++] = binfo[1];
it6505_set_bits(it6505, REG_HDCP_CTRL2, HDCP_EN_M0_READ,
HDCP_EN_M0_READ);
err = regmap_bulk_read(it6505->regmap, REG_M0_0_7,
sha1_input + msg_count, 8);
it6505_set_bits(it6505, REG_HDCP_CTRL2, HDCP_EN_M0_READ, 0x00);
if (err < 0) {
dev_err(dev, " Warning, Read M value Fail");
return err;
}
msg_count += 8;
return msg_count;
}
static bool it6505_hdcp_part2_ksvlist_check(struct it6505 *it6505)
{
struct device *dev = it6505->dev;
u8 av[5][4], bv[5][4];
int i, err;
i = it6505_setup_sha1_input(it6505, it6505->sha1_input);
if (i <= 0) {
dev_err(dev, "SHA-1 Input length error %d", i);
return false;
}
it6505_sha1_digest(it6505, it6505->sha1_input, i, (u8 *)av);
err = it6505_get_dpcd(it6505, DP_AUX_HDCP_V_PRIME(0), (u8 *)bv,
sizeof(bv));
if (err < 0) {
dev_err(dev, "Read V' value Fail");
return false;
}
for (i = 0; i < 5; i++)
if (bv[i][3] != av[i][0] || bv[i][2] != av[i][1] ||
bv[i][1] != av[i][2] || bv[i][0] != av[i][3])
return false;
DRM_DEV_DEBUG_DRIVER(dev, "V' all match!!");
return true;
}
static void it6505_hdcp_wait_ksv_list(struct work_struct *work)
{
struct it6505 *it6505 = container_of(work, struct it6505,
hdcp_wait_ksv_list);
struct device *dev = it6505->dev;
unsigned int timeout = 5000;
u8 bstatus = 0;
bool ksv_list_check;
timeout /= 20;
while (timeout > 0) {
if (!it6505_get_sink_hpd_status(it6505))
return;
bstatus = it6505_dpcd_read(it6505, DP_AUX_HDCP_BSTATUS);
if (bstatus & DP_BSTATUS_READY)
break;
msleep(20);
timeout--;
}
if (timeout == 0) {
DRM_DEV_DEBUG_DRIVER(dev, "timeout and ksv list wait failed");
goto timeout;
}
ksv_list_check = it6505_hdcp_part2_ksvlist_check(it6505);
DRM_DEV_DEBUG_DRIVER(dev, "ksv list ready, ksv list check %s",
ksv_list_check ? "pass" : "fail");
if (ksv_list_check) {
it6505_set_bits(it6505, REG_HDCP_TRIGGER,
HDCP_TRIGGER_KSV_DONE, HDCP_TRIGGER_KSV_DONE);
return;
}
timeout:
it6505_set_bits(it6505, REG_HDCP_TRIGGER,
HDCP_TRIGGER_KSV_DONE | HDCP_TRIGGER_KSV_FAIL,
HDCP_TRIGGER_KSV_DONE | HDCP_TRIGGER_KSV_FAIL);
}
static void it6505_hdcp_work(struct work_struct *work)
{
struct it6505 *it6505 = container_of(work, struct it6505,
hdcp_work.work);
struct device *dev = it6505->dev;
int ret;
u8 link_status[DP_LINK_STATUS_SIZE] = { 0 };
DRM_DEV_DEBUG_DRIVER(dev, "start");
if (!it6505_get_sink_hpd_status(it6505))
return;
ret = drm_dp_dpcd_read_link_status(&it6505->aux, link_status);
DRM_DEV_DEBUG_DRIVER(dev, "ret: %d link_status: %*ph", ret,
(int)sizeof(link_status), link_status);
if (ret < 0 || !drm_dp_channel_eq_ok(link_status, it6505->lane_count) ||
!it6505_get_video_status(it6505)) {
DRM_DEV_DEBUG_DRIVER(dev, "link train not done or no video");
return;
}
ret = it6505_get_dpcd(it6505, DP_AUX_HDCP_BKSV, it6505->bksvs,
ARRAY_SIZE(it6505->bksvs));
if (ret < 0) {
dev_err(dev, "fail to get bksv ret: %d", ret);
it6505_set_bits(it6505, REG_HDCP_TRIGGER,
HDCP_TRIGGER_KSV_FAIL, HDCP_TRIGGER_KSV_FAIL);
}
DRM_DEV_DEBUG_DRIVER(dev, "bksv = 0x%*ph",
(int)ARRAY_SIZE(it6505->bksvs), it6505->bksvs);
if (!it6505_hdcp_is_ksv_valid(it6505->bksvs)) {
dev_err(dev, "Display Port bksv not valid");
it6505_set_bits(it6505, REG_HDCP_TRIGGER,
HDCP_TRIGGER_KSV_FAIL, HDCP_TRIGGER_KSV_FAIL);
}
it6505_hdcp_part1_auth(it6505);
}
static void it6505_show_hdcp_info(struct it6505 *it6505)
{
struct device *dev = it6505->dev;
int i;
u8 *sha1 = it6505->sha1_input;
DRM_DEV_DEBUG_DRIVER(dev, "hdcp_status: %d is_repeater: %d",
it6505->hdcp_status, it6505->is_repeater);
DRM_DEV_DEBUG_DRIVER(dev, "bksv = 0x%*ph",
(int)ARRAY_SIZE(it6505->bksvs), it6505->bksvs);
if (it6505->is_repeater) {
DRM_DEV_DEBUG_DRIVER(dev, "hdcp_down_stream_count: %d",
it6505->hdcp_down_stream_count);
DRM_DEV_DEBUG_DRIVER(dev, "sha1_input: 0x%*ph",
(int)ARRAY_SIZE(it6505->sha1_input),
it6505->sha1_input);
for (i = 0; i < it6505->hdcp_down_stream_count; i++) {
DRM_DEV_DEBUG_DRIVER(dev, "KSV_%d = 0x%*ph", i,
DRM_HDCP_KSV_LEN, sha1);
sha1 += DRM_HDCP_KSV_LEN;
}
DRM_DEV_DEBUG_DRIVER(dev, "binfo: 0x%2ph M0: 0x%8ph",
sha1, sha1 + 2);
}
}
static void it6505_stop_link_train(struct it6505 *it6505)
{
it6505->link_state = LINK_IDLE;
cancel_work_sync(&it6505->link_works);
it6505_write(it6505, REG_TRAIN_CTRL1, FORCE_RETRAIN);
}
static void it6505_link_train_ok(struct it6505 *it6505)
{
struct device *dev = it6505->dev;
it6505->link_state = LINK_OK;
/* disalbe mute enable avi info frame */
it6505_set_bits(it6505, REG_DATA_MUTE_CTRL, EN_VID_MUTE, 0x00);
it6505_set_bits(it6505, REG_INFOFRAME_CTRL,
EN_VID_CTRL_PKT, EN_VID_CTRL_PKT);
if (it6505_audio_input(it6505)) {
DRM_DEV_DEBUG_DRIVER(dev, "Enable audio!");
it6505_enable_audio(it6505);
}
if (it6505->hdcp_desired)
it6505_start_hdcp(it6505);
}
static void it6505_link_step_train_process(struct it6505 *it6505)
{
struct device *dev = it6505->dev;
int ret, i, step_retry = 3;
DRM_DEV_DEBUG_DRIVER(dev, "Start step train");
if (it6505->sink_count == 0) {
DRM_DEV_DEBUG_DRIVER(dev, "it6505->sink_count:%d, force eq",
it6505->sink_count);
it6505_set_bits(it6505, REG_TRAIN_CTRL0, FORCE_EQ_DONE,
FORCE_EQ_DONE);
return;
}
if (!it6505->step_train) {
DRM_DEV_DEBUG_DRIVER(dev, "not support step train");
return;
}
/* step training start here */
for (i = 0; i < step_retry; i++) {
it6505_link_reset_step_train(it6505);
ret = it6505_link_start_step_train(it6505);
DRM_DEV_DEBUG_DRIVER(dev, "step train %s, retry:%d times",
ret ? "pass" : "failed", i + 1);
if (ret) {
it6505_link_train_ok(it6505);
return;
}
}
DRM_DEV_DEBUG_DRIVER(dev, "training fail");
it6505->link_state = LINK_IDLE;
it6505_video_reset(it6505);
}
static void it6505_link_training_work(struct work_struct *work)
{
struct it6505 *it6505 = container_of(work, struct it6505, link_works);
struct device *dev = it6505->dev;
int ret;
DRM_DEV_DEBUG_DRIVER(dev, "it6505->sink_count: %d",
it6505->sink_count);
if (!it6505_get_sink_hpd_status(it6505))
return;
it6505_link_training_setup(it6505);
it6505_reset_hdcp(it6505);
it6505_aux_reset(it6505);
if (it6505->auto_train_retry < 1) {
it6505_link_step_train_process(it6505);
return;
}
ret = it6505_link_start_auto_train(it6505);
DRM_DEV_DEBUG_DRIVER(dev, "auto train %s, auto_train_retry: %d",
ret ? "pass" : "failed", it6505->auto_train_retry);
if (ret) {
it6505->auto_train_retry = AUTO_TRAIN_RETRY;
it6505_link_train_ok(it6505);
} else {
it6505->auto_train_retry--;
it6505_dump(it6505);
}
}
static void it6505_plugged_status_to_codec(struct it6505 *it6505)
{
enum drm_connector_status status = it6505->connector_status;
if (it6505->plugged_cb && it6505->codec_dev)
it6505->plugged_cb(it6505->codec_dev,
status == connector_status_connected);
}
static void it6505_remove_edid(struct it6505 *it6505)
{
drm_edid_free(it6505->cached_edid);
it6505->cached_edid = NULL;
}
static int it6505_process_hpd_irq(struct it6505 *it6505)
{
struct device *dev = it6505->dev;
int ret, dpcd_sink_count, dp_irq_vector, bstatus;
u8 link_status[DP_LINK_STATUS_SIZE];
if (!it6505_get_sink_hpd_status(it6505)) {
DRM_DEV_DEBUG_DRIVER(dev, "HPD_IRQ HPD low");
it6505->sink_count = 0;
return 0;
}
ret = it6505_dpcd_read(it6505, DP_SINK_COUNT);
if (ret < 0)
return ret;
dpcd_sink_count = DP_GET_SINK_COUNT(ret);
DRM_DEV_DEBUG_DRIVER(dev, "dpcd_sink_count: %d it6505->sink_count:%d",
dpcd_sink_count, it6505->sink_count);
if (it6505->branch_device && dpcd_sink_count != it6505->sink_count) {
memset(it6505->dpcd, 0, sizeof(it6505->dpcd));
it6505->sink_count = dpcd_sink_count;
it6505_reset_logic(it6505);
it6505_int_mask_enable(it6505);
it6505_init(it6505);
it6505_remove_edid(it6505);
return 0;
}
dp_irq_vector = it6505_dpcd_read(it6505, DP_DEVICE_SERVICE_IRQ_VECTOR);
if (dp_irq_vector < 0)
return dp_irq_vector;
DRM_DEV_DEBUG_DRIVER(dev, "dp_irq_vector = 0x%02x", dp_irq_vector);
if (dp_irq_vector & DP_CP_IRQ) {
it6505_set_bits(it6505, REG_HDCP_TRIGGER, HDCP_TRIGGER_CPIRQ,
HDCP_TRIGGER_CPIRQ);
bstatus = it6505_dpcd_read(it6505, DP_AUX_HDCP_BSTATUS);
if (bstatus < 0)
return bstatus;
DRM_DEV_DEBUG_DRIVER(dev, "Bstatus = 0x%02x", bstatus);
}
ret = drm_dp_dpcd_read_link_status(&it6505->aux, link_status);
if (ret < 0) {
dev_err(dev, "Fail to read link status ret: %d", ret);
return ret;
}
DRM_DEV_DEBUG_DRIVER(dev, "link status = 0x%*ph",
(int)ARRAY_SIZE(link_status), link_status);
if (!drm_dp_channel_eq_ok(link_status, it6505->lane_count)) {
it6505->auto_train_retry = AUTO_TRAIN_RETRY;
it6505_video_reset(it6505);
}
return 0;
}
static void it6505_irq_hpd(struct it6505 *it6505)
{
struct device *dev = it6505->dev;
int dp_sink_count;
it6505->hpd_state = it6505_get_sink_hpd_status(it6505);
DRM_DEV_DEBUG_DRIVER(dev, "hpd change interrupt, change to %s",
it6505->hpd_state ? "high" : "low");
if (it6505->hpd_state) {
wait_for_completion_timeout(&it6505->extcon_completion,
msecs_to_jiffies(1000));
it6505_aux_on(it6505);
if (it6505->dpcd[0] == 0) {
it6505_get_dpcd(it6505, DP_DPCD_REV, it6505->dpcd,
ARRAY_SIZE(it6505->dpcd));
it6505_variable_config(it6505);
it6505_parse_link_capabilities(it6505);
}
it6505->auto_train_retry = AUTO_TRAIN_RETRY;
it6505_drm_dp_link_set_power(&it6505->aux, &it6505->link,
DP_SET_POWER_D0);
dp_sink_count = it6505_dpcd_read(it6505, DP_SINK_COUNT);
it6505->sink_count = DP_GET_SINK_COUNT(dp_sink_count);
DRM_DEV_DEBUG_DRIVER(dev, "it6505->sink_count: %d",
it6505->sink_count);
it6505_lane_termination_on(it6505);
it6505_lane_power_on(it6505);
/*
* for some dongle which issue HPD_irq
* when sink count change from 0->1
* it6505 not able to receive HPD_IRQ
* if HW never go into trainig done
*/
if (it6505->branch_device && it6505->sink_count == 0)
schedule_work(&it6505->link_works);
if (!it6505_get_video_status(it6505))
it6505_video_reset(it6505);
} else {
memset(it6505->dpcd, 0, sizeof(it6505->dpcd));
it6505_remove_edid(it6505);
if (it6505->hdcp_desired)
it6505_stop_hdcp(it6505);
it6505_video_disable(it6505);
it6505_disable_audio(it6505);
it6505_stop_link_train(it6505);
it6505_lane_off(it6505);
it6505_link_reset_step_train(it6505);
}
if (it6505->bridge.dev)
drm_helper_hpd_irq_event(it6505->bridge.dev);
}
static void it6505_irq_hpd_irq(struct it6505 *it6505)
{
struct device *dev = it6505->dev;
DRM_DEV_DEBUG_DRIVER(dev, "hpd_irq interrupt");
if (it6505_process_hpd_irq(it6505) < 0)
DRM_DEV_DEBUG_DRIVER(dev, "process hpd_irq fail!");
}
static void it6505_irq_scdt(struct it6505 *it6505)
{
struct device *dev = it6505->dev;
bool data;
data = it6505_get_video_status(it6505);
DRM_DEV_DEBUG_DRIVER(dev, "video stable change interrupt, %s",
data ? "stable" : "unstable");
it6505_calc_video_info(it6505);
it6505_link_reset_step_train(it6505);
if (data)
schedule_work(&it6505->link_works);
}
static void it6505_irq_hdcp_done(struct it6505 *it6505)
{
struct device *dev = it6505->dev;
DRM_DEV_DEBUG_DRIVER(dev, "hdcp done interrupt");
it6505->hdcp_status = HDCP_AUTH_DONE;
it6505_show_hdcp_info(it6505);
}
static void it6505_irq_hdcp_fail(struct it6505 *it6505)
{
struct device *dev = it6505->dev;
DRM_DEV_DEBUG_DRIVER(dev, "hdcp fail interrupt");
it6505->hdcp_status = HDCP_AUTH_IDLE;
it6505_show_hdcp_info(it6505);
it6505_start_hdcp(it6505);
}
static void it6505_irq_aux_cmd_fail(struct it6505 *it6505)
{
struct device *dev = it6505->dev;
DRM_DEV_DEBUG_DRIVER(dev, "AUX PC Request Fail Interrupt");
}
static void it6505_irq_hdcp_ksv_check(struct it6505 *it6505)
{
struct device *dev = it6505->dev;
DRM_DEV_DEBUG_DRIVER(dev, "HDCP event Interrupt");
schedule_work(&it6505->hdcp_wait_ksv_list);
}
static void it6505_irq_audio_fifo_error(struct it6505 *it6505)
{
struct device *dev = it6505->dev;
DRM_DEV_DEBUG_DRIVER(dev, "audio fifo error Interrupt");
if (it6505_audio_input(it6505))
it6505_enable_audio(it6505);
}
static void it6505_irq_link_train_fail(struct it6505 *it6505)
{
struct device *dev = it6505->dev;
DRM_DEV_DEBUG_DRIVER(dev, "link training fail interrupt");
schedule_work(&it6505->link_works);
}
static bool it6505_test_bit(unsigned int bit, const unsigned int *addr)
{
return 1 & (addr[bit / BITS_PER_BYTE] >> (bit % BITS_PER_BYTE));
}
static void it6505_irq_video_handler(struct it6505 *it6505, const int *int_status)
{
struct device *dev = it6505->dev;
int reg_0d, reg_int03;
/*
* When video SCDT change with video not stable,
* Or video FIFO error, need video reset
*/
if ((!it6505_get_video_status(it6505) &&
(it6505_test_bit(INT_SCDT_CHANGE, (unsigned int *)int_status))) ||
(it6505_test_bit(BIT_INT_IO_FIFO_OVERFLOW,
(unsigned int *)int_status)) ||
(it6505_test_bit(BIT_INT_VID_FIFO_ERROR,
(unsigned int *)int_status))) {
it6505->auto_train_retry = AUTO_TRAIN_RETRY;
flush_work(&it6505->link_works);
it6505_stop_hdcp(it6505);
it6505_video_reset(it6505);
usleep_range(10000, 11000);
/*
* Clear FIFO error IRQ to prevent fifo error -> reset loop
* HW will trigger SCDT change IRQ again when video stable
*/
reg_int03 = it6505_read(it6505, INT_STATUS_03);
reg_0d = it6505_read(it6505, REG_SYSTEM_STS);
reg_int03 &= (BIT(INT_VID_FIFO_ERROR) | BIT(INT_IO_LATCH_FIFO_OVERFLOW));
it6505_write(it6505, INT_STATUS_03, reg_int03);
DRM_DEV_DEBUG_DRIVER(dev, "reg08 = 0x%02x", reg_int03);
DRM_DEV_DEBUG_DRIVER(dev, "reg0D = 0x%02x", reg_0d);
return;
}
if (it6505_test_bit(INT_SCDT_CHANGE, (unsigned int *)int_status))
it6505_irq_scdt(it6505);
}
static irqreturn_t it6505_int_threaded_handler(int unused, void *data)
{
struct it6505 *it6505 = data;
struct device *dev = it6505->dev;
static const struct {
int bit;
void (*handler)(struct it6505 *it6505);
} irq_vec[] = {
{ BIT_INT_HPD, it6505_irq_hpd },
{ BIT_INT_HPD_IRQ, it6505_irq_hpd_irq },
{ BIT_INT_HDCP_FAIL, it6505_irq_hdcp_fail },
{ BIT_INT_HDCP_DONE, it6505_irq_hdcp_done },
{ BIT_INT_AUX_CMD_FAIL, it6505_irq_aux_cmd_fail },
{ BIT_INT_HDCP_KSV_CHECK, it6505_irq_hdcp_ksv_check },
{ BIT_INT_AUDIO_FIFO_ERROR, it6505_irq_audio_fifo_error },
{ BIT_INT_LINK_TRAIN_FAIL, it6505_irq_link_train_fail },
};
int int_status[3], i;
if (it6505->enable_drv_hold || !it6505->powered)
return IRQ_HANDLED;
pm_runtime_get_sync(dev);
int_status[0] = it6505_read(it6505, INT_STATUS_01);
int_status[1] = it6505_read(it6505, INT_STATUS_02);
int_status[2] = it6505_read(it6505, INT_STATUS_03);
it6505_write(it6505, INT_STATUS_01, int_status[0]);
it6505_write(it6505, INT_STATUS_02, int_status[1]);
it6505_write(it6505, INT_STATUS_03, int_status[2]);
DRM_DEV_DEBUG_DRIVER(dev, "reg06 = 0x%02x", int_status[0]);
DRM_DEV_DEBUG_DRIVER(dev, "reg07 = 0x%02x", int_status[1]);
DRM_DEV_DEBUG_DRIVER(dev, "reg08 = 0x%02x", int_status[2]);
it6505_debug_print(it6505, REG_SYSTEM_STS, "");
if (it6505_test_bit(irq_vec[0].bit, (unsigned int *)int_status))
irq_vec[0].handler(it6505);
if (it6505->hpd_state) {
for (i = 1; i < ARRAY_SIZE(irq_vec); i++) {
if (it6505_test_bit(irq_vec[i].bit, (unsigned int *)int_status))
irq_vec[i].handler(it6505);
}
it6505_irq_video_handler(it6505, (unsigned int *)int_status);
}
pm_runtime_put_sync(dev);
return IRQ_HANDLED;
}
static int it6505_poweron(struct it6505 *it6505)
{
struct device *dev = it6505->dev;
struct it6505_platform_data *pdata = &it6505->pdata;
int err;
DRM_DEV_DEBUG_DRIVER(dev, "it6505 start powered on");
if (it6505->powered) {
DRM_DEV_DEBUG_DRIVER(dev, "it6505 already powered on");
return 0;
}
if (pdata->pwr18) {
err = regulator_enable(pdata->pwr18);
if (err) {
DRM_DEV_DEBUG_DRIVER(dev, "Failed to enable VDD18: %d",
err);
return err;
}
}
if (pdata->ovdd) {
/* time interval between IVDD and OVDD at least be 1ms */
usleep_range(1000, 2000);
err = regulator_enable(pdata->ovdd);
if (err) {
regulator_disable(pdata->pwr18);
return err;
}
}
/* time interval between OVDD and SYSRSTN at least be 10ms */
if (pdata->gpiod_reset) {
usleep_range(10000, 20000);
gpiod_set_value_cansleep(pdata->gpiod_reset, 0);
usleep_range(1000, 2000);
gpiod_set_value_cansleep(pdata->gpiod_reset, 1);
usleep_range(25000, 35000);
}
it6505->powered = true;
it6505_reset_logic(it6505);
it6505_int_mask_enable(it6505);
it6505_init(it6505);
it6505_lane_off(it6505);
enable_irq(it6505->irq);
return 0;
}
static int it6505_poweroff(struct it6505 *it6505)
{
struct device *dev = it6505->dev;
struct it6505_platform_data *pdata = &it6505->pdata;
int err;
DRM_DEV_DEBUG_DRIVER(dev, "it6505 start power off");
if (!it6505->powered) {
DRM_DEV_DEBUG_DRIVER(dev, "power had been already off");
return 0;
}
disable_irq_nosync(it6505->irq);
if (pdata->gpiod_reset)
gpiod_set_value_cansleep(pdata->gpiod_reset, 0);
if (pdata->pwr18) {
err = regulator_disable(pdata->pwr18);
if (err)
return err;
}
if (pdata->ovdd) {
err = regulator_disable(pdata->ovdd);
if (err)
return err;
}
it6505->powered = false;
it6505->sink_count = 0;
return 0;
}
static enum drm_connector_status it6505_detect(struct it6505 *it6505)
{
struct device *dev = it6505->dev;
enum drm_connector_status status = connector_status_disconnected;
int dp_sink_count;
DRM_DEV_DEBUG_DRIVER(dev, "it6505->sink_count:%d powered:%d",
it6505->sink_count, it6505->powered);
mutex_lock(&it6505->mode_lock);
if (!it6505->powered)
goto unlock;
if (it6505->enable_drv_hold) {
status = it6505->hpd_state ? connector_status_connected :
connector_status_disconnected;
goto unlock;
}
if (it6505->hpd_state) {
it6505_drm_dp_link_set_power(&it6505->aux, &it6505->link,
DP_SET_POWER_D0);
dp_sink_count = it6505_dpcd_read(it6505, DP_SINK_COUNT);
it6505->sink_count = DP_GET_SINK_COUNT(dp_sink_count);
DRM_DEV_DEBUG_DRIVER(dev, "it6505->sink_count:%d branch:%d",
it6505->sink_count, it6505->branch_device);
if (it6505->branch_device) {
status = (it6505->sink_count != 0) ?
connector_status_connected :
connector_status_disconnected;
} else {
status = connector_status_connected;
}
} else {
it6505->sink_count = 0;
memset(it6505->dpcd, 0, sizeof(it6505->dpcd));
}
unlock:
if (it6505->connector_status != status) {
it6505->connector_status = status;
it6505_plugged_status_to_codec(it6505);
}
mutex_unlock(&it6505->mode_lock);
return status;
}
static int it6505_extcon_notifier(struct notifier_block *self,
unsigned long event, void *ptr)
{
struct it6505 *it6505 = container_of(self, struct it6505, event_nb);
schedule_work(&it6505->extcon_wq);
return NOTIFY_DONE;
}
static void it6505_extcon_work(struct work_struct *work)
{
struct it6505 *it6505 = container_of(work, struct it6505, extcon_wq);
struct device *dev = it6505->dev;
int state, ret;
if (it6505->enable_drv_hold)
return;
mutex_lock(&it6505->extcon_lock);
state = extcon_get_state(it6505->extcon, EXTCON_DISP_DP);
DRM_DEV_DEBUG_DRIVER(dev, "EXTCON_DISP_DP = 0x%02x", state);
if (state == it6505->extcon_state || unlikely(state < 0))
goto unlock;
it6505->extcon_state = state;
if (state) {
DRM_DEV_DEBUG_DRIVER(dev, "start to power on");
msleep(100);
ret = pm_runtime_get_sync(dev);
/*
* On system resume, extcon_work can be triggered before
* pm_runtime_force_resume re-enables runtime power management.
* Handling the error here to make sure the bridge is powered on.
*/
if (ret < 0)
it6505_poweron(it6505);
complete_all(&it6505->extcon_completion);
} else {
DRM_DEV_DEBUG_DRIVER(dev, "start to power off");
pm_runtime_put_sync(dev);
reinit_completion(&it6505->extcon_completion);
drm_helper_hpd_irq_event(it6505->bridge.dev);
memset(it6505->dpcd, 0, sizeof(it6505->dpcd));
DRM_DEV_DEBUG_DRIVER(dev, "power off it6505 success!");
}
unlock:
mutex_unlock(&it6505->extcon_lock);
}
static int it6505_use_notifier_module(struct it6505 *it6505)
{
int ret;
struct device *dev = it6505->dev;
it6505->event_nb.notifier_call = it6505_extcon_notifier;
INIT_WORK(&it6505->extcon_wq, it6505_extcon_work);
ret = devm_extcon_register_notifier(it6505->dev,
it6505->extcon, EXTCON_DISP_DP,
&it6505->event_nb);
if (ret) {
dev_err(dev, "failed to register notifier for DP");
return ret;
}
schedule_work(&it6505->extcon_wq);
return 0;
}
static void it6505_remove_notifier_module(struct it6505 *it6505)
{
if (it6505->extcon) {
devm_extcon_unregister_notifier(it6505->dev,
it6505->extcon, EXTCON_DISP_DP,
&it6505->event_nb);
flush_work(&it6505->extcon_wq);
}
}
static void __maybe_unused it6505_delayed_audio(struct work_struct *work)
{
struct it6505 *it6505 = container_of(work, struct it6505,
delayed_audio.work);
DRM_DEV_DEBUG_DRIVER(it6505->dev, "start");
if (!it6505->powered)
return;
if (!it6505->enable_drv_hold)
it6505_enable_audio(it6505);
}
static int __maybe_unused it6505_audio_setup_hw_params(struct it6505 *it6505,
struct hdmi_codec_params
*params)
{
struct device *dev = it6505->dev;
int i = 0;
DRM_DEV_DEBUG_DRIVER(dev, "%s %d Hz, %d bit, %d channels\n", __func__,
params->sample_rate, params->sample_width,
params->cea.channels);
if (!it6505->bridge.encoder)
return -ENODEV;
if (params->cea.channels <= 1 || params->cea.channels > 8) {
DRM_DEV_DEBUG_DRIVER(dev, "channel number: %d not support",
it6505->audio.channel_count);
return -EINVAL;
}
it6505->audio.channel_count = params->cea.channels;
while (i < ARRAY_SIZE(audio_sample_rate_map) &&
params->sample_rate !=
audio_sample_rate_map[i].sample_rate_value) {
i++;
}
if (i == ARRAY_SIZE(audio_sample_rate_map)) {
DRM_DEV_DEBUG_DRIVER(dev, "sample rate: %d Hz not support",
params->sample_rate);
return -EINVAL;
}
it6505->audio.sample_rate = audio_sample_rate_map[i].rate;
switch (params->sample_width) {
case 16:
it6505->audio.word_length = WORD_LENGTH_16BIT;
break;
case 18:
it6505->audio.word_length = WORD_LENGTH_18BIT;
break;
case 20:
it6505->audio.word_length = WORD_LENGTH_20BIT;
break;
case 24:
case 32:
it6505->audio.word_length = WORD_LENGTH_24BIT;
break;
default:
DRM_DEV_DEBUG_DRIVER(dev, "wordlength: %d bit not support",
params->sample_width);
return -EINVAL;
}
return 0;
}
static void __maybe_unused it6505_audio_shutdown(struct device *dev, void *data)
{
struct it6505 *it6505 = dev_get_drvdata(dev);
if (it6505->powered)
it6505_disable_audio(it6505);
}
static int __maybe_unused it6505_audio_hook_plugged_cb(struct device *dev,
void *data,
hdmi_codec_plugged_cb fn,
struct device *codec_dev)
{
struct it6505 *it6505 = data;
it6505->plugged_cb = fn;
it6505->codec_dev = codec_dev;
it6505_plugged_status_to_codec(it6505);
return 0;
}
static inline struct it6505 *bridge_to_it6505(struct drm_bridge *bridge)
{
return container_of(bridge, struct it6505, bridge);
}
static int it6505_bridge_attach(struct drm_bridge *bridge,
enum drm_bridge_attach_flags flags)
{
struct it6505 *it6505 = bridge_to_it6505(bridge);
struct device *dev = it6505->dev;
int ret;
if (!(flags & DRM_BRIDGE_ATTACH_NO_CONNECTOR)) {
DRM_ERROR("DRM_BRIDGE_ATTACH_NO_CONNECTOR must be supplied");
return -EINVAL;
}
/* Register aux channel */
it6505->aux.drm_dev = bridge->dev;
ret = drm_dp_aux_register(&it6505->aux);
if (ret < 0) {
dev_err(dev, "Failed to register aux: %d", ret);
return ret;
}
if (it6505->extcon) {
ret = it6505_use_notifier_module(it6505);
if (ret < 0) {
dev_err(dev, "use notifier module failed");
return ret;
}
}
return 0;
}
static void it6505_bridge_detach(struct drm_bridge *bridge)
{
struct it6505 *it6505 = bridge_to_it6505(bridge);
flush_work(&it6505->link_works);
it6505_remove_notifier_module(it6505);
}
static enum drm_mode_status
it6505_bridge_mode_valid(struct drm_bridge *bridge,
const struct drm_display_info *info,
const struct drm_display_mode *mode)
{
struct it6505 *it6505 = bridge_to_it6505(bridge);
if (mode->flags & DRM_MODE_FLAG_INTERLACE)
return MODE_NO_INTERLACE;
if (mode->clock > it6505->max_dpi_pixel_clock)
return MODE_CLOCK_HIGH;
it6505->video_info.clock = mode->clock;
return MODE_OK;
}
static void it6505_bridge_atomic_enable(struct drm_bridge *bridge,
struct drm_bridge_state *old_state)
{
struct it6505 *it6505 = bridge_to_it6505(bridge);
struct device *dev = it6505->dev;
struct drm_atomic_state *state = old_state->base.state;
struct hdmi_avi_infoframe frame;
struct drm_crtc_state *crtc_state;
struct drm_connector_state *conn_state;
struct drm_display_mode *mode;
struct drm_connector *connector;
int ret;
DRM_DEV_DEBUG_DRIVER(dev, "start");
connector = drm_atomic_get_new_connector_for_encoder(state,
bridge->encoder);
if (WARN_ON(!connector))
return;
conn_state = drm_atomic_get_new_connector_state(state, connector);
if (WARN_ON(!conn_state))
return;
crtc_state = drm_atomic_get_new_crtc_state(state, conn_state->crtc);
if (WARN_ON(!crtc_state))
return;
mode = &crtc_state->adjusted_mode;
if (WARN_ON(!mode))
return;
ret = drm_hdmi_avi_infoframe_from_display_mode(&frame,
connector,
mode);
if (ret)
dev_err(dev, "Failed to setup AVI infoframe: %d", ret);
it6505_update_video_parameter(it6505, mode);
ret = it6505_send_video_infoframe(it6505, &frame);
if (ret)
dev_err(dev, "Failed to send AVI infoframe: %d", ret);
it6505_int_mask_enable(it6505);
it6505_video_reset(it6505);
it6505_drm_dp_link_set_power(&it6505->aux, &it6505->link,
DP_SET_POWER_D0);
}
static void it6505_bridge_atomic_disable(struct drm_bridge *bridge,
struct drm_bridge_state *old_state)
{
struct it6505 *it6505 = bridge_to_it6505(bridge);
struct device *dev = it6505->dev;
DRM_DEV_DEBUG_DRIVER(dev, "start");
if (it6505->powered) {
it6505_drm_dp_link_set_power(&it6505->aux, &it6505->link,
DP_SET_POWER_D3);
it6505_video_disable(it6505);
}
}
static void it6505_bridge_atomic_pre_enable(struct drm_bridge *bridge,
struct drm_bridge_state *old_state)
{
struct it6505 *it6505 = bridge_to_it6505(bridge);
struct device *dev = it6505->dev;
DRM_DEV_DEBUG_DRIVER(dev, "start");
pm_runtime_get_sync(dev);
}
static void it6505_bridge_atomic_post_disable(struct drm_bridge *bridge,
struct drm_bridge_state *old_state)
{
struct it6505 *it6505 = bridge_to_it6505(bridge);
struct device *dev = it6505->dev;
DRM_DEV_DEBUG_DRIVER(dev, "start");
pm_runtime_put_sync(dev);
}
static enum drm_connector_status
it6505_bridge_detect(struct drm_bridge *bridge)
{
struct it6505 *it6505 = bridge_to_it6505(bridge);
return it6505_detect(it6505);
}
static const struct drm_edid *it6505_bridge_edid_read(struct drm_bridge *bridge,
struct drm_connector *connector)
{
struct it6505 *it6505 = bridge_to_it6505(bridge);
struct device *dev = it6505->dev;
if (!it6505->cached_edid) {
it6505->cached_edid = drm_edid_read_custom(connector,
it6505_get_edid_block,
it6505);
if (!it6505->cached_edid) {
DRM_DEV_DEBUG_DRIVER(dev, "failed to get edid!");
return NULL;
}
}
return drm_edid_dup(it6505->cached_edid);
}
static const struct drm_bridge_funcs it6505_bridge_funcs = {
.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
.atomic_reset = drm_atomic_helper_bridge_reset,
.attach = it6505_bridge_attach,
.detach = it6505_bridge_detach,
.mode_valid = it6505_bridge_mode_valid,
.atomic_enable = it6505_bridge_atomic_enable,
.atomic_disable = it6505_bridge_atomic_disable,
.atomic_pre_enable = it6505_bridge_atomic_pre_enable,
.atomic_post_disable = it6505_bridge_atomic_post_disable,
.detect = it6505_bridge_detect,
.edid_read = it6505_bridge_edid_read,
};
static __maybe_unused int it6505_bridge_resume(struct device *dev)
{
struct it6505 *it6505 = dev_get_drvdata(dev);
return it6505_poweron(it6505);
}
static __maybe_unused int it6505_bridge_suspend(struct device *dev)
{
struct it6505 *it6505 = dev_get_drvdata(dev);
return it6505_poweroff(it6505);
}
static const struct dev_pm_ops it6505_bridge_pm_ops = {
SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
SET_RUNTIME_PM_OPS(it6505_bridge_suspend, it6505_bridge_resume, NULL)
};
static int it6505_init_pdata(struct it6505 *it6505)
{
struct it6505_platform_data *pdata = &it6505->pdata;
struct device *dev = it6505->dev;
/* 1.0V digital core power regulator */
pdata->pwr18 = devm_regulator_get(dev, "pwr18");
if (IS_ERR(pdata->pwr18)) {
dev_err(dev, "pwr18 regulator not found");
return PTR_ERR(pdata->pwr18);
}
pdata->ovdd = devm_regulator_get(dev, "ovdd");
if (IS_ERR(pdata->ovdd)) {
dev_err(dev, "ovdd regulator not found");
return PTR_ERR(pdata->ovdd);
}
pdata->gpiod_reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
if (IS_ERR(pdata->gpiod_reset)) {
dev_err(dev, "gpiod_reset gpio not found");
return PTR_ERR(pdata->gpiod_reset);
}
return 0;
}
static int it6505_get_data_lanes_count(const struct device_node *endpoint,
const unsigned int min,
const unsigned int max)
{
int ret;
ret = of_property_count_u32_elems(endpoint, "data-lanes");
if (ret < 0)
return ret;
if (ret < min || ret > max)
return -EINVAL;
return ret;
}
static void it6505_parse_dt(struct it6505 *it6505)
{
struct device *dev = it6505->dev;
struct device_node *np = dev->of_node, *ep = NULL;
int len;
u64 link_frequencies;
u32 data_lanes[4];
u32 *afe_setting = &it6505->afe_setting;
u32 *max_lane_count = &it6505->max_lane_count;
u32 *max_dpi_pixel_clock = &it6505->max_dpi_pixel_clock;
it6505->lane_swap_disabled =
device_property_read_bool(dev, "no-laneswap");
if (it6505->lane_swap_disabled)
it6505->lane_swap = false;
if (device_property_read_u32(dev, "afe-setting", afe_setting) == 0) {
if (*afe_setting >= ARRAY_SIZE(afe_setting_table)) {
dev_err(dev, "afe setting error, use default");
*afe_setting = 0;
}
} else {
*afe_setting = 0;
}
ep = of_graph_get_endpoint_by_regs(np, 1, 0);
of_node_put(ep);
if (ep) {
len = it6505_get_data_lanes_count(ep, 1, 4);
if (len > 0 && len != 3) {
of_property_read_u32_array(ep, "data-lanes",
data_lanes, len);
*max_lane_count = len;
} else {
*max_lane_count = MAX_LANE_COUNT;
dev_err(dev, "error data-lanes, use default");
}
} else {
*max_lane_count = MAX_LANE_COUNT;
dev_err(dev, "error endpoint, use default");
}
ep = of_graph_get_endpoint_by_regs(np, 0, 0);
of_node_put(ep);
if (ep) {
len = of_property_read_variable_u64_array(ep,
"link-frequencies",
&link_frequencies, 0,
1);
if (len >= 0) {
do_div(link_frequencies, 1000);
if (link_frequencies > 297000) {
dev_err(dev,
"max pixel clock error, use default");
*max_dpi_pixel_clock = DPI_PIXEL_CLK_MAX;
} else {
*max_dpi_pixel_clock = link_frequencies;
}
} else {
dev_err(dev, "error link frequencies, use default");
*max_dpi_pixel_clock = DPI_PIXEL_CLK_MAX;
}
} else {
dev_err(dev, "error endpoint, use default");
*max_dpi_pixel_clock = DPI_PIXEL_CLK_MAX;
}
DRM_DEV_DEBUG_DRIVER(dev, "using afe_setting: %u, max_lane_count: %u",
it6505->afe_setting, it6505->max_lane_count);
DRM_DEV_DEBUG_DRIVER(dev, "using max_dpi_pixel_clock: %u kHz",
it6505->max_dpi_pixel_clock);
}
static ssize_t receive_timing_debugfs_show(struct file *file, char __user *buf,
size_t len, loff_t *ppos)
{
struct it6505 *it6505 = file->private_data;
struct drm_display_mode *vid;
u8 read_buf[READ_BUFFER_SIZE];
u8 *str = read_buf, *end = read_buf + READ_BUFFER_SIZE;
ssize_t ret, count;
if (!it6505)
return -ENODEV;
it6505_calc_video_info(it6505);
vid = &it6505->video_info;
str += scnprintf(str, end - str, "---video timing---\n");
str += scnprintf(str, end - str, "PCLK:%d.%03dMHz\n",
vid->clock / 1000, vid->clock % 1000);
str += scnprintf(str, end - str, "HTotal:%d\n", vid->htotal);
str += scnprintf(str, end - str, "HActive:%d\n", vid->hdisplay);
str += scnprintf(str, end - str, "HFrontPorch:%d\n",
vid->hsync_start - vid->hdisplay);
str += scnprintf(str, end - str, "HSyncWidth:%d\n",
vid->hsync_end - vid->hsync_start);
str += scnprintf(str, end - str, "HBackPorch:%d\n",
vid->htotal - vid->hsync_end);
str += scnprintf(str, end - str, "VTotal:%d\n", vid->vtotal);
str += scnprintf(str, end - str, "VActive:%d\n", vid->vdisplay);
str += scnprintf(str, end - str, "VFrontPorch:%d\n",
vid->vsync_start - vid->vdisplay);
str += scnprintf(str, end - str, "VSyncWidth:%d\n",
vid->vsync_end - vid->vsync_start);
str += scnprintf(str, end - str, "VBackPorch:%d\n",
vid->vtotal - vid->vsync_end);
count = str - read_buf;
ret = simple_read_from_buffer(buf, len, ppos, read_buf, count);
return ret;
}
static int force_power_on_off_debugfs_write(void *data, u64 value)
{
struct it6505 *it6505 = data;
if (!it6505)
return -ENODEV;
if (value)
it6505_poweron(it6505);
else
it6505_poweroff(it6505);
return 0;
}
static int enable_drv_hold_debugfs_show(void *data, u64 *buf)
{
struct it6505 *it6505 = data;
if (!it6505)
return -ENODEV;
*buf = it6505->enable_drv_hold;
return 0;
}
static int enable_drv_hold_debugfs_write(void *data, u64 drv_hold)
{
struct it6505 *it6505 = data;
if (!it6505)
return -ENODEV;
it6505->enable_drv_hold = drv_hold;
if (it6505->enable_drv_hold) {
it6505_int_mask_disable(it6505);
} else {
it6505_clear_int(it6505);
it6505_int_mask_enable(it6505);
if (it6505->powered) {
it6505->connector_status =
it6505_get_sink_hpd_status(it6505) ?
connector_status_connected :
connector_status_disconnected;
} else {
it6505->connector_status =
connector_status_disconnected;
}
}
return 0;
}
static const struct file_operations receive_timing_fops = {
.owner = THIS_MODULE,
.open = simple_open,
.read = receive_timing_debugfs_show,
.llseek = default_llseek,
};
DEFINE_DEBUGFS_ATTRIBUTE(fops_force_power, NULL,
force_power_on_off_debugfs_write, "%llu\n");
DEFINE_DEBUGFS_ATTRIBUTE(fops_enable_drv_hold, enable_drv_hold_debugfs_show,
enable_drv_hold_debugfs_write, "%llu\n");
static const struct debugfs_entries debugfs_entry[] = {
{ "receive_timing", &receive_timing_fops },
{ "force_power_on_off", &fops_force_power },
{ "enable_drv_hold", &fops_enable_drv_hold },
{ NULL, NULL },
};
static void debugfs_create_files(struct it6505 *it6505)
{
int i = 0;
while (debugfs_entry[i].name && debugfs_entry[i].fops) {
debugfs_create_file(debugfs_entry[i].name, 0644,
it6505->debugfs, it6505,
debugfs_entry[i].fops);
i++;
}
}
static void debugfs_init(struct it6505 *it6505)
{
struct device *dev = it6505->dev;
it6505->debugfs = debugfs_create_dir(DEBUGFS_DIR_NAME, NULL);
if (IS_ERR(it6505->debugfs)) {
dev_err(dev, "failed to create debugfs root");
return;
}
debugfs_create_files(it6505);
}
static void it6505_debugfs_remove(struct it6505 *it6505)
{
debugfs_remove_recursive(it6505->debugfs);
}
static void it6505_shutdown(struct i2c_client *client)
{
struct it6505 *it6505 = dev_get_drvdata(&client->dev);
if (it6505->powered)
it6505_lane_off(it6505);
}
static int it6505_i2c_probe(struct i2c_client *client)
{
struct it6505 *it6505;
struct device *dev = &client->dev;
struct extcon_dev *extcon;
int err;
it6505 = devm_kzalloc(&client->dev, sizeof(*it6505), GFP_KERNEL);
if (!it6505)
return -ENOMEM;
mutex_init(&it6505->extcon_lock);
mutex_init(&it6505->mode_lock);
mutex_init(&it6505->aux_lock);
it6505->bridge.of_node = client->dev.of_node;
it6505->connector_status = connector_status_disconnected;
it6505->dev = &client->dev;
i2c_set_clientdata(client, it6505);
/* get extcon device from DTS */
extcon = extcon_get_edev_by_phandle(dev, 0);
if (PTR_ERR(extcon) == -EPROBE_DEFER)
return -EPROBE_DEFER;
if (IS_ERR(extcon)) {
dev_err(dev, "can not get extcon device!");
return PTR_ERR(extcon);
}
it6505->extcon = extcon;
it6505->regmap = devm_regmap_init_i2c(client, &it6505_regmap_config);
if (IS_ERR(it6505->regmap)) {
dev_err(dev, "regmap i2c init failed");
err = PTR_ERR(it6505->regmap);
return err;
}
err = it6505_init_pdata(it6505);
if (err) {
dev_err(dev, "Failed to initialize pdata: %d", err);
return err;
}
it6505_parse_dt(it6505);
it6505->irq = client->irq;
if (!it6505->irq) {
dev_err(dev, "Failed to get INTP IRQ");
err = -ENODEV;
return err;
}
err = devm_request_threaded_irq(&client->dev, it6505->irq, NULL,
it6505_int_threaded_handler,
IRQF_TRIGGER_LOW | IRQF_ONESHOT |
IRQF_NO_AUTOEN,
"it6505-intp", it6505);
if (err) {
dev_err(dev, "Failed to request INTP threaded IRQ: %d", err);
return err;
}
INIT_WORK(&it6505->link_works, it6505_link_training_work);
INIT_WORK(&it6505->hdcp_wait_ksv_list, it6505_hdcp_wait_ksv_list);
INIT_DELAYED_WORK(&it6505->hdcp_work, it6505_hdcp_work);
init_completion(&it6505->extcon_completion);
memset(it6505->dpcd, 0, sizeof(it6505->dpcd));
it6505->powered = false;
it6505->enable_drv_hold = DEFAULT_DRV_HOLD;
if (DEFAULT_PWR_ON)
it6505_poweron(it6505);
DRM_DEV_DEBUG_DRIVER(dev, "it6505 device name: %s", dev_name(dev));
debugfs_init(it6505);
pm_runtime_enable(dev);
it6505->aux.name = "DP-AUX";
it6505->aux.dev = dev;
it6505->aux.transfer = it6505_aux_transfer;
drm_dp_aux_init(&it6505->aux);
it6505->bridge.funcs = &it6505_bridge_funcs;
it6505->bridge.type = DRM_MODE_CONNECTOR_DisplayPort;
it6505->bridge.ops = DRM_BRIDGE_OP_DETECT | DRM_BRIDGE_OP_EDID |
DRM_BRIDGE_OP_HPD;
drm_bridge_add(&it6505->bridge);
return 0;
}
static void it6505_i2c_remove(struct i2c_client *client)
{
struct it6505 *it6505 = i2c_get_clientdata(client);
drm_bridge_remove(&it6505->bridge);
drm_dp_aux_unregister(&it6505->aux);
it6505_debugfs_remove(it6505);
it6505_poweroff(it6505);
it6505_remove_edid(it6505);
}
static const struct i2c_device_id it6505_id[] = {
{ "it6505", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, it6505_id);
static const struct of_device_id it6505_of_match[] = {
{ .compatible = "ite,it6505" },
{ }
};
static struct i2c_driver it6505_i2c_driver = {
.driver = {
.name = "it6505",
.of_match_table = it6505_of_match,
.pm = &it6505_bridge_pm_ops,
},
.probe = it6505_i2c_probe,
.remove = it6505_i2c_remove,
.shutdown = it6505_shutdown,
.id_table = it6505_id,
};
module_i2c_driver(it6505_i2c_driver);
MODULE_AUTHOR("Allen Chen <[email protected]>");
MODULE_DESCRIPTION("IT6505 DisplayPort Transmitter driver");
MODULE_LICENSE("GPL v2");
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