// 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 … #define REG_RESET_CTRL … #define VIDEO_RESET … #define AUDIO_RESET … #define ALL_LOGIC_RESET … #define AUX_RESET … #define HDCP_RESET … #define INT_STATUS_01 … #define INT_MASK_01 … #define INT_HPD_CHANGE … #define INT_RECEIVE_HPD_IRQ … #define INT_SCDT_CHANGE … #define INT_HDCP_FAIL … #define INT_HDCP_DONE … #define BIT_OFFSET(x) … #define BIT_INT_HPD … #define BIT_INT_HPD_IRQ … #define BIT_INT_SCDT … #define BIT_INT_HDCP_FAIL … #define BIT_INT_HDCP_DONE … #define INT_STATUS_02 … #define INT_MASK_02 … #define INT_AUX_CMD_FAIL … #define INT_HDCP_KSV_CHECK … #define INT_AUDIO_FIFO_ERROR … #define BIT_INT_AUX_CMD_FAIL … #define BIT_INT_HDCP_KSV_CHECK … #define BIT_INT_AUDIO_FIFO_ERROR … #define INT_STATUS_03 … #define INT_MASK_03 … #define INT_LINK_TRAIN_FAIL … #define INT_VID_FIFO_ERROR … #define INT_IO_LATCH_FIFO_OVERFLOW … #define BIT_INT_LINK_TRAIN_FAIL … #define BIT_INT_VID_FIFO_ERROR … #define BIT_INT_IO_FIFO_OVERFLOW … #define REG_SYSTEM_STS … #define INT_STS … #define HPD_STS … #define VIDEO_STB … #define REG_LINK_TRAIN_STS … #define LINK_STATE_CR … #define LINK_STATE_EQ … #define LINK_STATE_NORP … #define REG_BANK_SEL … #define REG_CLK_CTRL0 … #define M_PCLK_DELAY … #define REG_AUX_OPT … #define AUX_AUTO_RST … #define AUX_FIX_FREQ … #define REG_DATA_CTRL0 … #define VIDEO_LATCH_EDGE … #define ENABLE_PCLK_COUNTER … #define REG_PCLK_COUNTER_VALUE … #define REG_501_FIFO_CTRL … #define RST_501_FIFO … #define REG_TRAIN_CTRL0 … #define FORCE_LBR … #define LANE_COUNT_MASK … #define LANE_SWAP … #define SPREAD_AMP_5 … #define FORCE_CR_DONE … #define FORCE_EQ_DONE … #define REG_TRAIN_CTRL1 … #define AUTO_TRAIN … #define MANUAL_TRAIN … #define FORCE_RETRAIN … #define REG_AUX_CTRL … #define CLR_EDID_FIFO … #define AUX_USER_MODE … #define AUX_NO_SEGMENT_WR … #define AUX_EN_FIFO_READ … #define REG_AUX_ADR_0_7 … #define REG_AUX_ADR_8_15 … #define REG_AUX_ADR_16_19 … #define REG_AUX_OUT_DATA0 … #define REG_AUX_CMD_REQ … #define AUX_BUSY … #define REG_AUX_DATA_0_7 … #define REG_AUX_DATA_8_15 … #define REG_AUX_DATA_16_23 … #define REG_AUX_DATA_24_31 … #define REG_AUX_DATA_FIFO … #define REG_AUX_ERROR_STS … #define M_AUX_REQ_FAIL … #define REG_HDCP_CTRL1 … #define HDCP_CP_ENABLE … #define REG_HDCP_TRIGGER … #define HDCP_TRIGGER_START … #define HDCP_TRIGGER_CPIRQ … #define HDCP_TRIGGER_KSV_DONE … #define HDCP_TRIGGER_KSV_FAIL … #define REG_HDCP_CTRL2 … #define HDCP_AN_SEL … #define HDCP_AN_GEN … #define HDCP_HW_HPDIRQ_ACT … #define HDCP_EN_M0_READ … #define REG_M0_0_7 … #define REG_AN_0_7 … #define REG_SP_CTRL0 … #define REG_IP_CTRL1 … #define REG_IP_CTRL2 … #define REG_LINK_DRV … #define DRV_HS … #define REG_DRV_LN_DATA_SEL … #define REG_AUX … #define REG_VID_BUS_CTRL0 … #define IN_DDR … #define DDR_CD … #define REG_VID_BUS_CTRL1 … #define TX_FIFO_RESET … #define REG_INPUT_CTRL … #define INPUT_HSYNC_POL … #define INPUT_VSYNC_POL … #define INPUT_INTERLACED … #define REG_INPUT_HTOTAL … #define REG_INPUT_HACTIVE_START … #define REG_INPUT_HACTIVE_WIDTH … #define REG_INPUT_HFRONT_PORCH … #define REG_INPUT_HSYNC_WIDTH … #define REG_INPUT_VTOTAL … #define REG_INPUT_VACTIVE_START … #define REG_INPUT_VACTIVE_WIDTH … #define REG_INPUT_VFRONT_PORCH … #define REG_INPUT_VSYNC_WIDTH … #define REG_AUDIO_SRC_CTRL … #define M_AUDIO_I2S_EN … #define EN_I2S0 … #define EN_I2S1 … #define EN_I2S2 … #define EN_I2S3 … #define AUDIO_FIFO_RESET … #define REG_AUDIO_FMT … #define REG_AUDIO_FIFO_SEL … #define REG_AUDIO_CTRL0 … #define AUDIO_FULL_PKT … #define AUDIO_16B_BOUND … #define REG_AUDIO_CTRL1 … #define REG_AUDIO_INPUT_FREQ … #define REG_IEC958_STS0 … #define REG_IEC958_STS1 … #define REG_IEC958_STS2 … #define REG_IEC958_STS3 … #define REG_IEC958_STS4 … #define REG_HPD_IRQ_TIME … #define REG_AUX_DEBUG_MODE … #define REG_AUX_OPT2 … #define REG_HDCP_OPT … #define REG_USER_DRV_PRE … #define REG_DATA_MUTE_CTRL … #define ENABLE_ENHANCED_FRAME … #define ENABLE_AUTO_VIDEO_FIFO_RESET … #define EN_VID_MUTE … #define EN_AUD_MUTE … #define REG_TIME_STMP_CTRL … #define EN_ENHANCE_VID_STMP … #define EN_ENHANCE_AUD_STMP … #define M_STAMP_STEP … #define EN_SSC_GAT … #define REG_INFOFRAME_CTRL … #define EN_AVI_PKT … #define EN_AUD_PKT … #define EN_MPG_PKT … #define EN_GEN_PKT … #define EN_VID_TIME_STMP … #define EN_AUD_TIME_STMP … #define EN_VID_CTRL_PKT … #define EN_AUD_CTRL_PKT … #define REG_AUDIO_N_0_7 … #define REG_AUDIO_N_8_15 … #define REG_AUDIO_N_16_23 … #define REG_AVI_INFO_DB1 … #define REG_AVI_INFO_DB2 … #define REG_AVI_INFO_DB3 … #define REG_AVI_INFO_DB4 … #define REG_AVI_INFO_DB5 … #define REG_AVI_INFO_SUM … #define REG_AUD_INFOFRAM_DB1 … #define REG_AUD_INFOFRAM_DB2 … #define REG_AUD_INFOFRAM_DB3 … #define REG_AUD_INFOFRAM_DB4 … #define REG_AUD_INFOFRAM_SUM … /* the following six registers are in bank1 */ #define REG_DRV_0_DB_800_MV … #define REG_PRE_0_DB_800_MV … #define REG_PRE_3P5_DB_800_MV … #define REG_SSC_CTRL0 … #define REG_SSC_CTRL1 … #define REG_SSC_CTRL2 … #define RBR … #define HBR … #define HBR2 … #define HBR3 … #define DPCD_V_1_1 … #define MISC_VERB … #define MISC_VERC … #define I2S_INPUT_FORMAT_STANDARD … #define I2S_INPUT_FORMAT_32BIT … #define I2S_INPUT_LEFT_JUSTIFIED … #define I2S_INPUT_RIGHT_JUSTIFIED … #define I2S_DATA_1T_DELAY … #define I2S_DATA_NO_DELAY … #define I2S_WS_LEFT_CHANNEL … #define I2S_WS_RIGHT_CHANNEL … #define I2S_DATA_MSB_FIRST … #define I2S_DATA_LSB_FIRST … #define WORD_LENGTH_16BIT … #define WORD_LENGTH_18BIT … #define WORD_LENGTH_20BIT … #define WORD_LENGTH_24BIT … #define DEBUGFS_DIR_NAME … #define READ_BUFFER_SIZE … /* Vendor option */ #define HDCP_DESIRED … #define MAX_LANE_COUNT … #define MAX_LINK_RATE … #define AUTO_TRAIN_RETRY … #define MAX_HDCP_DOWN_STREAM_COUNT … #define MAX_CR_LEVEL … #define MAX_EQ_LEVEL … #define AUX_WAIT_TIMEOUT_MS … #define AUX_FIFO_MAX_SIZE … #define PIXEL_CLK_DELAY … #define PIXEL_CLK_INVERSE … #define ADJUST_PHASE_THRESHOLD … #define DPI_PIXEL_CLK_MAX … #define HDCP_SHA1_FIFO_LEN … #define DEFAULT_PWR_ON … #define DEFAULT_DRV_HOLD … #define AUDIO_SELECT … #define AUDIO_TYPE … #define AUDIO_SAMPLE_RATE … #define AUDIO_CHANNEL_COUNT … #define I2S_INPUT_FORMAT … #define I2S_JUSTIFIED … #define I2S_DATA_DELAY … #define I2S_WS_CHANNEL … #define I2S_DATA_SEQUENCE … #define AUDIO_WORD_LENGTH … enum aux_cmd_type { … }; enum aux_cmd_reply { … }; enum link_train_status { … }; enum hdcp_state { … }; struct it6505_platform_data { … }; enum it6505_audio_select { … }; enum it6505_audio_sample_rate { … }; enum it6505_audio_type { … }; struct it6505_audio_data { … }; struct it6505_audio_sample_rate_map { … }; struct it6505_drm_dp_link { … }; struct debugfs_entries { … }; struct it6505 { … }; struct it6505_step_train_para { … }; /* * Vendor option afe settings for different platforms * 0: without FPC cable * 1: with FPC cable */ static const u8 afe_setting_table[][3] = …; static const struct it6505_audio_sample_rate_map audio_sample_rate_map[] = …; static const struct regmap_range it6505_bridge_volatile_ranges[] = …; static const struct regmap_access_table it6505_bridge_volatile_table = …; static const struct regmap_range_cfg it6505_regmap_banks[] = …; static const struct regmap_config it6505_regmap_config = …; static int it6505_read(struct it6505 *it6505, unsigned int reg_addr) { … } static int it6505_write(struct it6505 *it6505, unsigned int reg_addr, unsigned int reg_val) { … } static int it6505_set_bits(struct it6505 *it6505, unsigned int reg, unsigned int mask, unsigned int value) { … } static void it6505_debug_print(struct it6505 *it6505, unsigned int reg, const char *prefix) { … } static int it6505_dpcd_read(struct it6505 *it6505, unsigned long offset) { … } static int it6505_dpcd_write(struct it6505 *it6505, unsigned long offset, u8 datain) { … } static int it6505_get_dpcd(struct it6505 *it6505, int offset, u8 *dpcd, int num) { … } static void it6505_dump(struct it6505 *it6505) { … } static bool it6505_get_sink_hpd_status(struct it6505 *it6505) { … } static int it6505_read_word(struct it6505 *it6505, unsigned int reg) { … } static void it6505_calc_video_info(struct it6505 *it6505) { … } static int it6505_drm_dp_link_set_power(struct drm_dp_aux *aux, struct it6505_drm_dp_link *link, u8 mode) { … } static void it6505_clear_int(struct it6505 *it6505) { … } static void it6505_int_mask_enable(struct it6505 *it6505) { … } static void it6505_int_mask_disable(struct it6505 *it6505) { … } static void it6505_lane_termination_on(struct it6505 *it6505) { … } static void it6505_lane_termination_off(struct it6505 *it6505) { … } static void it6505_lane_power_on(struct it6505 *it6505) { … } static void it6505_lane_power_off(struct it6505 *it6505) { … } static void it6505_lane_off(struct it6505 *it6505) { … } static void it6505_aux_termination_on(struct it6505 *it6505) { … } static void it6505_aux_power_on(struct it6505 *it6505) { … } static void it6505_aux_on(struct it6505 *it6505) { … } static void it6505_aux_reset(struct it6505 *it6505) { … } static void it6505_reset_logic(struct it6505 *it6505) { … } static bool it6505_aux_op_finished(struct it6505 *it6505) { … } static int it6505_aux_wait(struct it6505 *it6505) { … } 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) { … } 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) { … } static ssize_t it6505_aux_transfer(struct drm_dp_aux *aux, struct drm_dp_aux_msg *msg) { … } static int it6505_get_edid_block(void *data, u8 *buf, unsigned int block, size_t len) { … } static void it6505_variable_config(struct it6505 *it6505) { … } static int it6505_send_video_infoframe(struct it6505 *it6505, struct hdmi_avi_infoframe *frame) { … } static void it6505_get_extcon_property(struct it6505 *it6505) { … } static void it6505_clk_phase_adjustment(struct it6505 *it6505, const struct drm_display_mode *mode) { … } static void it6505_link_reset_step_train(struct it6505 *it6505) { … } static void it6505_init(struct it6505 *it6505) { … } static void it6505_video_disable(struct it6505 *it6505) { … } static void it6505_video_reset(struct it6505 *it6505) { … } static void it6505_update_video_parameter(struct it6505 *it6505, const struct drm_display_mode *mode) { … } static bool it6505_audio_input(struct it6505 *it6505) { … } static void it6505_setup_audio_channel_status(struct it6505 *it6505) { … } static void it6505_setup_audio_format(struct it6505 *it6505) { … } static void it6505_enable_audio_source(struct it6505 *it6505) { … } static void it6505_enable_audio_infoframe(struct it6505 *it6505) { … } static void it6505_disable_audio(struct it6505 *it6505) { … } static void it6505_enable_audio(struct it6505 *it6505) { … } static bool it6505_use_step_train_check(struct it6505 *it6505) { … } static void it6505_parse_link_capabilities(struct it6505 *it6505) { … } static void it6505_setup_ssc(struct it6505 *it6505) { … } static inline void it6505_link_rate_setup(struct it6505 *it6505) { … } static void it6505_lane_count_setup(struct it6505 *it6505) { … } static void it6505_link_training_setup(struct it6505 *it6505) { … } static bool it6505_link_start_auto_train(struct it6505 *it6505) { … } static int it6505_drm_dp_link_configure(struct it6505 *it6505) { … } static bool it6505_check_voltage_swing_max(u8 lane_voltage_swing_pre_emphasis) { … } static bool it6505_check_pre_emphasis_max(u8 lane_voltage_swing_pre_emphasis) { … } static bool it6505_check_max_voltage_swing_reached(u8 *lane_voltage_swing, u8 lane_count) { … } 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) { … } static bool it6505_step_cr_train(struct it6505 *it6505, struct it6505_step_train_para *lane_voltage_pre_emphasis) { … } static bool it6505_step_eq_train(struct it6505 *it6505, struct it6505_step_train_para *lane_voltage_pre_emphasis) { … } static bool it6505_link_start_step_train(struct it6505 *it6505) { … } static bool it6505_get_video_status(struct it6505 *it6505) { … } static void it6505_reset_hdcp(struct it6505 *it6505) { … } static void it6505_start_hdcp(struct it6505 *it6505) { … } static void it6505_stop_hdcp(struct it6505 *it6505) { … } static bool it6505_hdcp_is_ksv_valid(u8 *ksv) { … } static void it6505_hdcp_part1_auth(struct it6505 *it6505) { … } static int it6505_sha1_digest(struct it6505 *it6505, u8 *sha1_input, unsigned int size, u8 *output_av) { … } static int it6505_setup_sha1_input(struct it6505 *it6505, u8 *sha1_input) { … } static bool it6505_hdcp_part2_ksvlist_check(struct it6505 *it6505) { … } static void it6505_hdcp_wait_ksv_list(struct work_struct *work) { … } static void it6505_hdcp_work(struct work_struct *work) { … } static void it6505_show_hdcp_info(struct it6505 *it6505) { … } static void it6505_stop_link_train(struct it6505 *it6505) { … } static void it6505_link_train_ok(struct it6505 *it6505) { … } static void it6505_link_step_train_process(struct it6505 *it6505) { … } static void it6505_link_training_work(struct work_struct *work) { … } static void it6505_plugged_status_to_codec(struct it6505 *it6505) { … } static void it6505_remove_edid(struct it6505 *it6505) { … } static int it6505_process_hpd_irq(struct it6505 *it6505) { … } static void it6505_irq_hpd(struct it6505 *it6505) { … } static void it6505_irq_hpd_irq(struct it6505 *it6505) { … } static void it6505_irq_scdt(struct it6505 *it6505) { … } static void it6505_irq_hdcp_done(struct it6505 *it6505) { … } static void it6505_irq_hdcp_fail(struct it6505 *it6505) { … } static void it6505_irq_aux_cmd_fail(struct it6505 *it6505) { … } static void it6505_irq_hdcp_ksv_check(struct it6505 *it6505) { … } static void it6505_irq_audio_fifo_error(struct it6505 *it6505) { … } static void it6505_irq_link_train_fail(struct it6505 *it6505) { … } static bool it6505_test_bit(unsigned int bit, const unsigned int *addr) { … } static void it6505_irq_video_handler(struct it6505 *it6505, const int *int_status) { … } static irqreturn_t it6505_int_threaded_handler(int unused, void *data) { … } static int it6505_poweron(struct it6505 *it6505) { … } static int it6505_poweroff(struct it6505 *it6505) { … } static enum drm_connector_status it6505_detect(struct it6505 *it6505) { … } static int it6505_extcon_notifier(struct notifier_block *self, unsigned long event, void *ptr) { … } static void it6505_extcon_work(struct work_struct *work) { … } static int it6505_use_notifier_module(struct it6505 *it6505) { … } static void it6505_remove_notifier_module(struct it6505 *it6505) { … } static void __maybe_unused it6505_delayed_audio(struct work_struct *work) { … } static int __maybe_unused it6505_audio_setup_hw_params(struct it6505 *it6505, struct hdmi_codec_params *params) { … } static void __maybe_unused it6505_audio_shutdown(struct device *dev, void *data) { … } static int __maybe_unused it6505_audio_hook_plugged_cb(struct device *dev, void *data, hdmi_codec_plugged_cb fn, struct device *codec_dev) { … } static inline struct it6505 *bridge_to_it6505(struct drm_bridge *bridge) { … } static int it6505_bridge_attach(struct drm_bridge *bridge, enum drm_bridge_attach_flags flags) { … } static void it6505_bridge_detach(struct drm_bridge *bridge) { … } 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) { … } static void it6505_bridge_atomic_enable(struct drm_bridge *bridge, struct drm_bridge_state *old_state) { … } static void it6505_bridge_atomic_disable(struct drm_bridge *bridge, struct drm_bridge_state *old_state) { … } static void it6505_bridge_atomic_pre_enable(struct drm_bridge *bridge, struct drm_bridge_state *old_state) { … } static void it6505_bridge_atomic_post_disable(struct drm_bridge *bridge, struct drm_bridge_state *old_state) { … } static enum drm_connector_status it6505_bridge_detect(struct drm_bridge *bridge) { … } static const struct drm_edid *it6505_bridge_edid_read(struct drm_bridge *bridge, struct drm_connector *connector) { … } static const struct drm_bridge_funcs it6505_bridge_funcs = …; static __maybe_unused int it6505_bridge_resume(struct device *dev) { … } static __maybe_unused int it6505_bridge_suspend(struct device *dev) { … } static const struct dev_pm_ops it6505_bridge_pm_ops = …; static int it6505_init_pdata(struct it6505 *it6505) { … } static int it6505_get_data_lanes_count(const struct device_node *endpoint, const unsigned int min, const unsigned int max) { … } static void it6505_parse_dt(struct it6505 *it6505) { … } static ssize_t receive_timing_debugfs_show(struct file *file, char __user *buf, size_t len, loff_t *ppos) { … } static int force_power_on_off_debugfs_write(void *data, u64 value) { … } static int enable_drv_hold_debugfs_show(void *data, u64 *buf) { … } static int enable_drv_hold_debugfs_write(void *data, u64 drv_hold) { … } static const struct file_operations receive_timing_fops = …; DEFINE_DEBUGFS_ATTRIBUTE(…); DEFINE_DEBUGFS_ATTRIBUTE(…); static const struct debugfs_entries debugfs_entry[] = …; static void debugfs_create_files(struct it6505 *it6505) { … } static void debugfs_init(struct it6505 *it6505) { … } static void it6505_debugfs_remove(struct it6505 *it6505) { … } static void it6505_shutdown(struct i2c_client *client) { … } static int it6505_i2c_probe(struct i2c_client *client) { … } static void it6505_i2c_remove(struct i2c_client *client) { … } static const struct i2c_device_id it6505_id[] = …; MODULE_DEVICE_TABLE(i2c, it6505_id); static const struct of_device_id it6505_of_match[] = …; static struct i2c_driver it6505_i2c_driver = …; module_i2c_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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