/* * (C) Copyright 2008-2017 Fuzhou Rockchip Electronics Co., Ltd * * SPDX-License-Identifier: GPL-2.0+ */ #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include "rockchip_display.h" #include "rockchip_crtc.h" #include "rockchip_connector.h" #include "analogix_dp.h" #define RK3588_GRF_VO1_CON0 0x0000 #define EDP_MODE BIT(0) #define RK3588_GRF_VO1_CON1 0x0004 /** * struct rockchip_dp_chip_data - splite the grf setting of kind of chips * @lcdsel_grf_reg: grf register offset of lcdc select * @lcdsel_big: reg value of selecting vop big for eDP * @lcdsel_lit: reg value of selecting vop little for eDP * @chip_type: specific chip type * @ssc: check if SSC is supported by source */ struct rockchip_dp_chip_data { u32 lcdsel_grf_reg; u32 lcdsel_big; u32 lcdsel_lit; u32 chip_type; bool ssc; u32 max_link_rate; u32 max_lane_count; }; static void analogix_dp_enable_rx_to_enhanced_mode(struct analogix_dp_device *dp, bool enable) { u8 data; analogix_dp_read_byte_from_dpcd(dp, DP_LANE_COUNT_SET, &data); if (enable) analogix_dp_write_byte_to_dpcd(dp, DP_LANE_COUNT_SET, DP_LANE_COUNT_ENHANCED_FRAME_EN | DPCD_LANE_COUNT_SET(data)); else analogix_dp_write_byte_to_dpcd(dp, DP_LANE_COUNT_SET, DPCD_LANE_COUNT_SET(data)); } static int analogix_dp_is_enhanced_mode_available(struct analogix_dp_device *dp) { u8 data; int retval; analogix_dp_read_byte_from_dpcd(dp, DP_MAX_LANE_COUNT, &data); retval = DPCD_ENHANCED_FRAME_CAP(data); return retval; } static void analogix_dp_set_enhanced_mode(struct analogix_dp_device *dp) { u8 data; data = analogix_dp_is_enhanced_mode_available(dp); analogix_dp_enable_rx_to_enhanced_mode(dp, data); analogix_dp_enable_enhanced_mode(dp, data); } static void analogix_dp_training_pattern_dis(struct analogix_dp_device *dp) { analogix_dp_set_training_pattern(dp, DP_NONE); analogix_dp_write_byte_to_dpcd(dp, DP_TRAINING_PATTERN_SET, DP_TRAINING_PATTERN_DISABLE); } static int analogix_dp_link_start(struct analogix_dp_device *dp) { u8 buf[4]; int lane, lane_count, retval; lane_count = dp->link_train.lane_count; dp->link_train.lt_state = CLOCK_RECOVERY; dp->link_train.eq_loop = 0; for (lane = 0; lane < lane_count; lane++) dp->link_train.cr_loop[lane] = 0; /* Set link rate and count as you want to establish*/ analogix_dp_set_link_bandwidth(dp, dp->link_train.link_rate); analogix_dp_set_lane_count(dp, dp->link_train.lane_count); /* Setup RX configuration */ buf[0] = dp->link_train.link_rate; buf[1] = dp->link_train.lane_count; retval = analogix_dp_write_bytes_to_dpcd(dp, DP_LINK_BW_SET, 2, buf); if (retval) return retval; /* Spread AMP if required, enable 8b/10b coding */ buf[0] = analogix_dp_ssc_supported(dp) ? DP_SPREAD_AMP_0_5 : 0; buf[1] = DP_SET_ANSI_8B10B; retval = analogix_dp_write_bytes_to_dpcd(dp, DP_DOWNSPREAD_CTRL, 2, buf); if (retval < 0) return retval; /* Set TX voltage-swing and pre-emphasis to minimum */ for (lane = 0; lane < lane_count; lane++) dp->link_train.training_lane[lane] = DP_TRAIN_VOLTAGE_SWING_LEVEL_0 | DP_TRAIN_PRE_EMPH_LEVEL_0; analogix_dp_set_lane_link_training(dp); /* Set training pattern 1 */ analogix_dp_set_training_pattern(dp, TRAINING_PTN1); /* Set RX training pattern */ retval = analogix_dp_write_byte_to_dpcd(dp, DP_TRAINING_PATTERN_SET, DP_LINK_SCRAMBLING_DISABLE | DP_TRAINING_PATTERN_1); if (retval) return retval; for (lane = 0; lane < lane_count; lane++) buf[lane] = DP_TRAIN_PRE_EMPH_LEVEL_0 | DP_TRAIN_VOLTAGE_SWING_LEVEL_0; retval = analogix_dp_write_bytes_to_dpcd(dp, DP_TRAINING_LANE0_SET, lane_count, buf); return retval; } static unsigned char analogix_dp_get_lane_status(u8 link_status[2], int lane) { int shift = (lane & 1) * 4; u8 link_value = link_status[lane >> 1]; return (link_value >> shift) & 0xf; } static int analogix_dp_clock_recovery_ok(u8 link_status[2], int lane_count) { int lane; u8 lane_status; for (lane = 0; lane < lane_count; lane++) { lane_status = analogix_dp_get_lane_status(link_status, lane); if ((lane_status & DP_LANE_CR_DONE) == 0) return -EINVAL; } return 0; } static int analogix_dp_channel_eq_ok(u8 link_status[2], u8 link_align, int lane_count) { int lane; u8 lane_status; if ((link_align & DP_INTERLANE_ALIGN_DONE) == 0) return -EINVAL; for (lane = 0; lane < lane_count; lane++) { lane_status = analogix_dp_get_lane_status(link_status, lane); lane_status &= DP_CHANNEL_EQ_BITS; if (lane_status != DP_CHANNEL_EQ_BITS) return -EINVAL; } return 0; } static unsigned char analogix_dp_get_adjust_request_voltage(u8 adjust_request[2], int lane) { int shift = (lane & 1) * 4; u8 link_value = adjust_request[lane >> 1]; return (link_value >> shift) & 0x3; } static unsigned char analogix_dp_get_adjust_request_pre_emphasis( u8 adjust_request[2], int lane) { int shift = (lane & 1) * 4; u8 link_value = adjust_request[lane >> 1]; return ((link_value >> shift) & 0xc) >> 2; } static void analogix_dp_reduce_link_rate(struct analogix_dp_device *dp) { analogix_dp_training_pattern_dis(dp); analogix_dp_set_enhanced_mode(dp); dp->link_train.lt_state = FAILED; } static void analogix_dp_get_adjust_training_lane(struct analogix_dp_device *dp, u8 adjust_request[2]) { int lane, lane_count; u8 voltage_swing, pre_emphasis, training_lane; lane_count = dp->link_train.lane_count; for (lane = 0; lane < lane_count; lane++) { voltage_swing = analogix_dp_get_adjust_request_voltage( adjust_request, lane); pre_emphasis = analogix_dp_get_adjust_request_pre_emphasis( adjust_request, lane); training_lane = DPCD_VOLTAGE_SWING_SET(voltage_swing) | DPCD_PRE_EMPHASIS_SET(pre_emphasis); if (voltage_swing == VOLTAGE_LEVEL_3) training_lane |= DP_TRAIN_MAX_SWING_REACHED; if (pre_emphasis == PRE_EMPHASIS_LEVEL_3) training_lane |= DP_TRAIN_MAX_PRE_EMPHASIS_REACHED; dp->link_train.training_lane[lane] = training_lane; } } static bool analogix_dp_tps3_supported(struct analogix_dp_device *dp) { bool source_tps3_supported, sink_tps3_supported; u8 dpcd = 0; source_tps3_supported = dp->video_info.max_link_rate == DP_LINK_BW_5_4; analogix_dp_read_byte_from_dpcd(dp, DP_MAX_LANE_COUNT, &dpcd); sink_tps3_supported = dpcd & DP_TPS3_SUPPORTED; return source_tps3_supported && sink_tps3_supported; } static int analogix_dp_process_clock_recovery(struct analogix_dp_device *dp) { int lane, lane_count, retval; u8 voltage_swing, pre_emphasis, training_lane; u8 link_status[2], adjust_request[2]; u8 training_pattern = TRAINING_PTN2; drm_dp_link_train_clock_recovery_delay(dp->dpcd); lane_count = dp->link_train.lane_count; retval = analogix_dp_read_bytes_from_dpcd(dp, DP_LANE0_1_STATUS, 2, link_status); if (retval) return retval; if (analogix_dp_clock_recovery_ok(link_status, lane_count) == 0) { if (analogix_dp_tps3_supported(dp)) training_pattern = TRAINING_PTN3; /* set training pattern for EQ */ analogix_dp_set_training_pattern(dp, training_pattern); retval = analogix_dp_write_byte_to_dpcd(dp, DP_TRAINING_PATTERN_SET, (training_pattern == TRAINING_PTN3 ? DP_TRAINING_PATTERN_3 : DP_TRAINING_PATTERN_2)); if (retval) return retval; dev_info(dp->dev, "Link Training Clock Recovery success\n"); dp->link_train.lt_state = EQUALIZER_TRAINING; return 0; } else { retval = analogix_dp_read_bytes_from_dpcd(dp, DP_ADJUST_REQUEST_LANE0_1, 2, adjust_request); if (retval) return retval; for (lane = 0; lane < lane_count; lane++) { training_lane = analogix_dp_get_lane_link_training( dp, lane); voltage_swing = analogix_dp_get_adjust_request_voltage( adjust_request, lane); pre_emphasis = analogix_dp_get_adjust_request_pre_emphasis( adjust_request, lane); if (DPCD_VOLTAGE_SWING_GET(training_lane) == voltage_swing && DPCD_PRE_EMPHASIS_GET(training_lane) == pre_emphasis) dp->link_train.cr_loop[lane]++; if (dp->link_train.cr_loop[lane] == MAX_CR_LOOP || voltage_swing == VOLTAGE_LEVEL_3 || pre_emphasis == PRE_EMPHASIS_LEVEL_3) { dev_err(dp->dev, "CR Max reached (%d,%d,%d)\n", dp->link_train.cr_loop[lane], voltage_swing, pre_emphasis); analogix_dp_reduce_link_rate(dp); return -EIO; } } } analogix_dp_get_adjust_training_lane(dp, adjust_request); analogix_dp_set_lane_link_training(dp); retval = analogix_dp_write_bytes_to_dpcd(dp, DP_TRAINING_LANE0_SET, lane_count, dp->link_train.training_lane); if (retval) return retval; return retval; } static int analogix_dp_process_equalizer_training(struct analogix_dp_device *dp) { int lane_count, retval; u32 reg; u8 link_align, link_status[2], adjust_request[2]; drm_dp_link_train_channel_eq_delay(dp->dpcd); lane_count = dp->link_train.lane_count; retval = analogix_dp_read_bytes_from_dpcd(dp, DP_LANE0_1_STATUS, 2, link_status); if (retval) return retval; if (analogix_dp_clock_recovery_ok(link_status, lane_count)) { analogix_dp_reduce_link_rate(dp); return -EIO; } retval = analogix_dp_read_byte_from_dpcd(dp, DP_LANE_ALIGN_STATUS_UPDATED, &link_align); if (retval) return retval; if (!analogix_dp_channel_eq_ok(link_status, link_align, lane_count)) { /* traing pattern Set to Normal */ analogix_dp_training_pattern_dis(dp); printf("Link Training success!\n"); analogix_dp_get_link_bandwidth(dp, ®); dp->link_train.link_rate = reg; analogix_dp_get_lane_count(dp, ®); dp->link_train.lane_count = reg; printf("final link rate = 0x%.2x, lane count = 0x%.2x\n", dp->link_train.link_rate, dp->link_train.lane_count); /* set enhanced mode if available */ analogix_dp_set_enhanced_mode(dp); dp->link_train.lt_state = FINISHED; return 0; } /* not all locked */ dp->link_train.eq_loop++; if (dp->link_train.eq_loop > MAX_EQ_LOOP) { dev_dbg(dp->dev, "EQ Max loop\n"); analogix_dp_reduce_link_rate(dp); return -EIO; } retval = analogix_dp_read_bytes_from_dpcd(dp, DP_ADJUST_REQUEST_LANE0_1, 2, adjust_request); if (retval) return retval; analogix_dp_get_adjust_training_lane(dp, adjust_request); analogix_dp_set_lane_link_training(dp); retval = analogix_dp_write_bytes_to_dpcd(dp, DP_TRAINING_LANE0_SET, lane_count, dp->link_train.training_lane); return retval; } static void analogix_dp_get_max_rx_bandwidth(struct analogix_dp_device *dp, u8 *bandwidth) { u8 data; /* * For DP rev.1.1, Maximum link rate of Main Link lanes * 0x06 = 1.62 Gbps, 0x0a = 2.7 Gbps * For DP rev.1.2, Maximum link rate of Main Link lanes * 0x06 = 1.62 Gbps, 0x0a = 2.7 Gbps, 0x14 = 5.4Gbps */ analogix_dp_read_byte_from_dpcd(dp, DP_MAX_LINK_RATE, &data); *bandwidth = data; } static void analogix_dp_get_max_rx_lane_count(struct analogix_dp_device *dp, u8 *lane_count) { u8 data; /* * For DP rev.1.1, Maximum number of Main Link lanes * 0x01 = 1 lane, 0x02 = 2 lanes, 0x04 = 4 lanes */ analogix_dp_read_byte_from_dpcd(dp, DP_MAX_LANE_COUNT, &data); *lane_count = DPCD_MAX_LANE_COUNT(data); } static int analogix_dp_init_training(struct analogix_dp_device *dp, enum link_lane_count_type max_lane, int max_rate) { u8 dpcd; /* * MACRO_RST must be applied after the PLL_LOCK to avoid * the DP inter pair skew issue for at least 10 us */ analogix_dp_reset_macro(dp); /* Initialize by reading RX's DPCD */ analogix_dp_get_max_rx_bandwidth(dp, &dp->link_train.link_rate); analogix_dp_get_max_rx_lane_count(dp, &dp->link_train.lane_count); /* Setup TX lane count & rate */ dp->link_train.lane_count = min_t(u8, dp->link_train.lane_count, max_lane); dp->link_train.link_rate = min_t(u32, dp->link_train.link_rate, max_rate); analogix_dp_read_byte_from_dpcd(dp, DP_MAX_DOWNSPREAD, &dpcd); dp->link_train.ssc = !!(dpcd & DP_MAX_DOWNSPREAD_0_5); /* All DP analog module power up */ analogix_dp_set_analog_power_down(dp, POWER_ALL, 0); return 0; } static int analogix_dp_sw_link_training(struct analogix_dp_device *dp) { int retval = 0, training_finished = 0; dp->link_train.lt_state = START; /* Process here */ while (!retval && !training_finished) { switch (dp->link_train.lt_state) { case START: retval = analogix_dp_link_start(dp); if (retval) dev_err(dp->dev, "LT link start failed!\n"); break; case CLOCK_RECOVERY: retval = analogix_dp_process_clock_recovery(dp); if (retval) dev_err(dp->dev, "LT CR failed!\n"); break; case EQUALIZER_TRAINING: retval = analogix_dp_process_equalizer_training(dp); if (retval) dev_err(dp->dev, "LT EQ failed!\n"); break; case FINISHED: training_finished = 1; break; case FAILED: return -EREMOTEIO; } } return retval; } static int analogix_dp_set_link_train(struct analogix_dp_device *dp, u32 count, u32 bwtype) { int i, ret; for (i = 0; i < 5; i++) { ret = analogix_dp_init_training(dp, count, bwtype); if (ret < 0) { dev_err(dp->dev, "failed to init training\n"); return ret; } ret = analogix_dp_sw_link_training(dp); if (!ret) break; } return ret; } static int analogix_dp_config_video(struct analogix_dp_device *dp) { int timeout_loop = 0; int done_count = 0; analogix_dp_config_video_slave_mode(dp); analogix_dp_set_video_color_format(dp); if (analogix_dp_get_pll_lock_status(dp) == PLL_UNLOCKED) { dev_err(dp->dev, "PLL is not locked yet.\n"); return -EINVAL; } for (;;) { timeout_loop++; if (analogix_dp_is_slave_video_stream_clock_on(dp) == 0) break; if (timeout_loop > DP_TIMEOUT_LOOP_COUNT) { dev_err(dp->dev, "Timeout of video streamclk ok\n"); return -ETIMEDOUT; } udelay(2); } /* Set to use the register calculated M/N video */ analogix_dp_set_video_cr_mn(dp, CALCULATED_M, 0, 0); /* For video bist, Video timing must be generated by register */ analogix_dp_set_video_timing_mode(dp, VIDEO_TIMING_FROM_REGISTER); /* Disable video mute */ analogix_dp_enable_video_mute(dp, 0); /* Configure video slave mode */ analogix_dp_enable_video_master(dp, 0); /* Enable video input */ analogix_dp_start_video(dp); timeout_loop = 0; for (;;) { timeout_loop++; if (analogix_dp_is_video_stream_on(dp) == 0) { done_count++; if (done_count > 10) break; } else if (done_count) { done_count = 0; } if (timeout_loop > DP_TIMEOUT_LOOP_COUNT) { dev_err(dp->dev, "Timeout of video streamclk ok\n"); return -ETIMEDOUT; } udelay(1001); } return 0; } static void analogix_dp_enable_scramble(struct analogix_dp_device *dp, bool enable) { u8 data; if (enable) { analogix_dp_enable_scrambling(dp); analogix_dp_read_byte_from_dpcd(dp, DP_TRAINING_PATTERN_SET, &data); analogix_dp_write_byte_to_dpcd(dp, DP_TRAINING_PATTERN_SET, (u8)(data & ~DP_LINK_SCRAMBLING_DISABLE)); } else { analogix_dp_disable_scrambling(dp); analogix_dp_read_byte_from_dpcd(dp, DP_TRAINING_PATTERN_SET, &data); analogix_dp_write_byte_to_dpcd(dp, DP_TRAINING_PATTERN_SET, (u8)(data | DP_LINK_SCRAMBLING_DISABLE)); } } static void analogix_dp_init_dp(struct analogix_dp_device *dp) { analogix_dp_reset(dp); analogix_dp_swreset(dp); analogix_dp_init_analog_param(dp); analogix_dp_init_interrupt(dp); /* SW defined function Normal operation */ analogix_dp_enable_sw_function(dp); analogix_dp_config_interrupt(dp); analogix_dp_init_analog_func(dp); analogix_dp_init_hpd(dp); analogix_dp_init_aux(dp); } static unsigned char analogix_dp_calc_edid_check_sum(unsigned char *edid_data) { int i; unsigned char sum = 0; for (i = 0; i < EDID_BLOCK_LENGTH; i++) sum = sum + edid_data[i]; return sum; } static int analogix_dp_read_edid(struct analogix_dp_device *dp) { unsigned char *edid = dp->edid; unsigned int extend_block = 0; unsigned char test_vector; int retval; /* * EDID device address is 0x50. * However, if necessary, you must have set upper address * into E-EDID in I2C device, 0x30. */ /* Read Extension Flag, Number of 128-byte EDID extension blocks */ retval = analogix_dp_read_byte_from_i2c(dp, I2C_EDID_DEVICE_ADDR, EDID_EXTENSION_FLAG, &extend_block); if (retval) return retval; if (extend_block > 0) { debug("EDID data includes a single extension!\n"); /* Read EDID data */ retval = analogix_dp_read_bytes_from_i2c(dp, I2C_EDID_DEVICE_ADDR, EDID_HEADER_PATTERN, EDID_BLOCK_LENGTH, &edid[EDID_HEADER_PATTERN]); if (retval < 0) return retval; if (analogix_dp_calc_edid_check_sum(edid)) return -EINVAL; /* Read additional EDID data */ retval = analogix_dp_read_bytes_from_i2c(dp, I2C_EDID_DEVICE_ADDR, EDID_BLOCK_LENGTH, EDID_BLOCK_LENGTH, &edid[EDID_BLOCK_LENGTH]); if (retval < 0) return retval; if (analogix_dp_calc_edid_check_sum(&edid[EDID_BLOCK_LENGTH])) return -EINVAL; analogix_dp_read_byte_from_dpcd(dp, DP_TEST_REQUEST, &test_vector); if (test_vector & DP_TEST_LINK_EDID_READ) { analogix_dp_write_byte_to_dpcd(dp, DP_TEST_EDID_CHECKSUM, edid[EDID_BLOCK_LENGTH + EDID_CHECKSUM]); analogix_dp_write_byte_to_dpcd(dp, DP_TEST_RESPONSE, DP_TEST_EDID_CHECKSUM_WRITE); } } else { dev_info(dp->dev, "EDID data does not include any extensions.\n"); /* Read EDID data */ retval = analogix_dp_read_bytes_from_i2c(dp, I2C_EDID_DEVICE_ADDR, EDID_HEADER_PATTERN, EDID_BLOCK_LENGTH, &edid[EDID_HEADER_PATTERN]); if (retval < 0) return retval; if (analogix_dp_calc_edid_check_sum(edid)) return -EINVAL; analogix_dp_read_byte_from_dpcd(dp, DP_TEST_REQUEST, &test_vector); if (test_vector & DP_TEST_LINK_EDID_READ) { analogix_dp_write_byte_to_dpcd(dp, DP_TEST_EDID_CHECKSUM, edid[EDID_CHECKSUM]); analogix_dp_write_byte_to_dpcd(dp, DP_TEST_RESPONSE, DP_TEST_EDID_CHECKSUM_WRITE); } } return 0; } static int analogix_dp_handle_edid(struct analogix_dp_device *dp) { u8 buf[12]; int i, try = 5; int retval; retry: /* Read DPCD DP_DPCD_REV~RECEIVE_PORT1_CAP_1 */ retval = analogix_dp_read_bytes_from_dpcd(dp, DP_DPCD_REV, 12, buf); if (retval && try--) { mdelay(10); goto retry; } if (retval) return retval; /* Read EDID */ for (i = 0; i < 3; i++) { retval = analogix_dp_read_edid(dp); if (!retval) break; } return retval; } static int analogix_dp_connector_init(struct rockchip_connector *conn, struct display_state *state) { struct connector_state *conn_state = &state->conn_state; struct analogix_dp_device *dp = dev_get_priv(conn->dev); conn_state->output_if |= dp->id ? VOP_OUTPUT_IF_eDP1 : VOP_OUTPUT_IF_eDP0; conn_state->output_mode = ROCKCHIP_OUT_MODE_AAAA; conn_state->color_space = V4L2_COLORSPACE_DEFAULT; reset_assert_bulk(&dp->resets); udelay(1); reset_deassert_bulk(&dp->resets); conn_state->disp_info = rockchip_get_disp_info(conn_state->type, dp->id); generic_phy_set_mode(&dp->phy, PHY_MODE_DP); generic_phy_power_on(&dp->phy); analogix_dp_init_dp(dp); return 0; } static int analogix_dp_connector_get_edid(struct rockchip_connector *conn, struct display_state *state) { struct connector_state *conn_state = &state->conn_state; struct analogix_dp_device *dp = dev_get_priv(conn->dev); int ret; ret = analogix_dp_handle_edid(dp); if (ret) { dev_err(dp->dev, "failed to get edid\n"); return ret; } memcpy(&conn_state->edid, &dp->edid, sizeof(dp->edid)); return 0; } static int analogix_dp_link_power_up(struct analogix_dp_device *dp) { u8 value; int ret; if (dp->dpcd[DP_DPCD_REV] < 0x11) return 0; ret = analogix_dp_read_byte_from_dpcd(dp, DP_SET_POWER, &value); if (ret < 0) return ret; value &= ~DP_SET_POWER_MASK; value |= DP_SET_POWER_D0; ret = analogix_dp_write_byte_to_dpcd(dp, DP_SET_POWER, value); if (ret < 0) return ret; mdelay(1); return 0; } static int analogix_dp_link_power_down(struct analogix_dp_device *dp) { u8 value; int ret; if (dp->dpcd[DP_DPCD_REV] < 0x11) return 0; ret = analogix_dp_read_byte_from_dpcd(dp, DP_SET_POWER, &value); if (ret < 0) return ret; value &= ~DP_SET_POWER_MASK; value |= DP_SET_POWER_D3; ret = analogix_dp_write_byte_to_dpcd(dp, DP_SET_POWER, value); if (ret < 0) return ret; return 0; } static int analogix_dp_connector_enable(struct rockchip_connector *conn, struct display_state *state) { struct connector_state *conn_state = &state->conn_state; struct crtc_state *crtc_state = &state->crtc_state; const struct rockchip_dp_chip_data *pdata = (const struct rockchip_dp_chip_data *)dev_get_driver_data(conn->dev); struct analogix_dp_device *dp = dev_get_priv(conn->dev); struct video_info *video = &dp->video_info; u32 val; int ret; if (pdata->lcdsel_grf_reg) { if (crtc_state->crtc_id) val = pdata->lcdsel_lit; else val = pdata->lcdsel_big; regmap_write(dp->grf, pdata->lcdsel_grf_reg, val); } if (pdata->chip_type == RK3588_EDP) regmap_write(dp->grf, dp->id ? RK3588_GRF_VO1_CON1 : RK3588_GRF_VO1_CON0, EDP_MODE << 16 | FIELD_PREP(EDP_MODE, 1)); switch (conn_state->bpc) { case 12: video->color_depth = COLOR_12; break; case 10: video->color_depth = COLOR_10; break; case 6: video->color_depth = COLOR_6; break; case 8: default: video->color_depth = COLOR_8; break; } ret = analogix_dp_read_bytes_from_dpcd(dp, DP_DPCD_REV, DP_RECEIVER_CAP_SIZE, dp->dpcd); if (ret) { dev_err(dp->dev, "failed to read dpcd caps: %d\n", ret); return ret; } ret = analogix_dp_link_power_up(dp); if (ret) { dev_err(dp->dev, "failed to power up link: %d\n", ret); return ret; } ret = analogix_dp_set_link_train(dp, dp->video_info.max_lane_count, dp->video_info.max_link_rate); if (ret) { dev_err(dp->dev, "unable to do link train\n"); return ret; } analogix_dp_enable_scramble(dp, 1); analogix_dp_enable_rx_to_enhanced_mode(dp, 1); analogix_dp_enable_enhanced_mode(dp, 1); analogix_dp_init_video(dp); analogix_dp_set_video_format(dp, &conn_state->mode); if (dp->video_bist_enable) analogix_dp_video_bist_enable(dp); ret = analogix_dp_config_video(dp); if (ret) { dev_err(dp->dev, "unable to config video\n"); return ret; } return 0; } static int analogix_dp_connector_disable(struct rockchip_connector *conn, struct display_state *state) { const struct rockchip_dp_chip_data *pdata = (const struct rockchip_dp_chip_data *)dev_get_driver_data(conn->dev); struct analogix_dp_device *dp = dev_get_priv(conn->dev); if (!analogix_dp_get_plug_in_status(dp)) analogix_dp_link_power_down(dp); if (pdata->chip_type == RK3588_EDP) regmap_write(dp->grf, dp->id ? RK3588_GRF_VO1_CON1 : RK3588_GRF_VO1_CON0, EDP_MODE << 16 | FIELD_PREP(EDP_MODE, 0)); return 0; } static int analogix_dp_connector_detect(struct rockchip_connector *conn, struct display_state *state) { struct analogix_dp_device *dp = dev_get_priv(conn->dev); return analogix_dp_detect(dp); } static int analogix_dp_connector_mode_valid(struct rockchip_connector *conn, struct display_state *state) { struct connector_state *conn_state = &state->conn_state; struct videomode vm; drm_display_mode_to_videomode(&conn_state->mode, &vm); if (!vm.hfront_porch || !vm.hback_porch || !vm.vfront_porch || !vm.vback_porch) { dev_err(dp->dev, "front porch or back porch can not be 0\n"); return MODE_BAD; } return MODE_OK; } static const struct rockchip_connector_funcs analogix_dp_connector_funcs = { .init = analogix_dp_connector_init, .get_edid = analogix_dp_connector_get_edid, .enable = analogix_dp_connector_enable, .disable = analogix_dp_connector_disable, .detect = analogix_dp_connector_detect, .mode_valid = analogix_dp_connector_mode_valid, }; static u32 analogix_dp_parse_link_frequencies(struct analogix_dp_device *dp) { struct udevice *dev = dp->dev; const struct device_node *endpoint; u64 frequency = 0; endpoint = rockchip_of_graph_get_endpoint_by_regs(dev->node, 1, 0); if (!endpoint) return 0; if (of_property_read_u64(endpoint, "link-frequencies", &frequency) < 0) return 0; if (!frequency) return 0; do_div(frequency, 10 * 1000); /* symbol rate kbytes */ switch (frequency) { case 162000: case 270000: case 540000: break; default: dev_err(dev, "invalid link frequency value: %llu\n", frequency); return 0; } return frequency; } static int analogix_dp_parse_dt(struct analogix_dp_device *dp) { struct udevice *dev = dp->dev; int len; u32 num_lanes; u32 max_link_rate; int ret; dp->force_hpd = dev_read_bool(dev, "force-hpd"); dp->video_bist_enable = dev_read_bool(dev, "analogix,video-bist-enable"); dp->video_info.force_stream_valid = dev_read_bool(dev, "analogix,force-stream-valid"); max_link_rate = analogix_dp_parse_link_frequencies(dp); if (max_link_rate && max_link_rate < drm_dp_bw_code_to_link_rate(dp->video_info.max_link_rate)) dp->video_info.max_link_rate = drm_dp_link_rate_to_bw_code(max_link_rate); if (dev_read_prop(dev, "data-lanes", &len)) { num_lanes = len / sizeof(u32); if (num_lanes < 1 || num_lanes > 4 || num_lanes == 3) { dev_err(dev, "bad number of data lanes\n"); return -EINVAL; } ret = dev_read_u32_array(dev, "data-lanes", dp->lane_map, num_lanes); if (ret) return ret; dp->video_info.max_lane_count = num_lanes; } else { dp->lane_map[0] = 0; dp->lane_map[1] = 1; dp->lane_map[2] = 2; dp->lane_map[3] = 3; } return 0; } static int analogix_dp_probe(struct udevice *dev) { struct analogix_dp_device *dp = dev_get_priv(dev); const struct rockchip_dp_chip_data *pdata = (const struct rockchip_dp_chip_data *)dev_get_driver_data(dev); struct udevice *syscon; int ret; dp->reg_base = dev_read_addr_ptr(dev); dp->id = of_alias_get_id(ofnode_to_np(dev->node), "edp"); if (dp->id < 0) dp->id = 0; ret = uclass_get_device_by_phandle(UCLASS_SYSCON, dev, "rockchip,grf", &syscon); if (!ret) { dp->grf = syscon_get_regmap(syscon); if (!dp->grf) return -ENODEV; } ret = reset_get_bulk(dev, &dp->resets); if (ret) { dev_err(dev, "failed to get reset control: %d\n", ret); return ret; } ret = gpio_request_by_name(dev, "hpd-gpios", 0, &dp->hpd_gpio, GPIOD_IS_IN); if (ret && ret != -ENOENT) { dev_err(dev, "failed to get hpd GPIO: %d\n", ret); return ret; } generic_phy_get_by_name(dev, "dp", &dp->phy); dp->plat_data.dev_type = ROCKCHIP_DP; dp->plat_data.subdev_type = pdata->chip_type; dp->plat_data.ssc = pdata->ssc; dp->video_info.max_link_rate = pdata->max_link_rate; dp->video_info.max_lane_count = pdata->max_lane_count; dp->dev = dev; ret = analogix_dp_parse_dt(dp); if (ret) { dev_err(dev, "failed to parse DT: %d\n", ret); return ret; } rockchip_connector_bind(&dp->connector, dev, dp->id, &analogix_dp_connector_funcs, NULL, DRM_MODE_CONNECTOR_eDP); return 0; } static const struct rockchip_dp_chip_data rk3288_edp_platform_data = { .lcdsel_grf_reg = 0x025c, .lcdsel_big = 0 | BIT(21), .lcdsel_lit = BIT(5) | BIT(21), .chip_type = RK3288_DP, .max_link_rate = DP_LINK_BW_2_7, .max_lane_count = 4, }; static const struct rockchip_dp_chip_data rk3368_edp_platform_data = { .chip_type = RK3368_EDP, .max_link_rate = DP_LINK_BW_2_7, .max_lane_count = 4, }; static const struct rockchip_dp_chip_data rk3399_edp_platform_data = { .lcdsel_grf_reg = 0x6250, .lcdsel_big = 0 | BIT(21), .lcdsel_lit = BIT(5) | BIT(21), .chip_type = RK3399_EDP, .ssc = true, .max_link_rate = DP_LINK_BW_5_4, .max_lane_count = 4, }; static const struct rockchip_dp_chip_data rk3568_edp_platform_data = { .chip_type = RK3568_EDP, .ssc = true, .max_link_rate = DP_LINK_BW_2_7, .max_lane_count = 4, }; static const struct rockchip_dp_chip_data rk3588_edp_platform_data = { .chip_type = RK3588_EDP, .ssc = true, .max_link_rate = DP_LINK_BW_5_4, .max_lane_count = 4, }; static const struct udevice_id analogix_dp_ids[] = { { .compatible = "rockchip,rk3288-dp", .data = (ulong)&rk3288_edp_platform_data, }, { .compatible = "rockchip,rk3368-edp", .data = (ulong)&rk3368_edp_platform_data, }, { .compatible = "rockchip,rk3399-edp", .data = (ulong)&rk3399_edp_platform_data, }, { .compatible = "rockchip,rk3568-edp", .data = (ulong)&rk3568_edp_platform_data, }, { .compatible = "rockchip,rk3588-edp", .data = (ulong)&rk3588_edp_platform_data, }, {} }; U_BOOT_DRIVER(analogix_dp) = { .name = "analogix_dp", .id = UCLASS_DISPLAY, .of_match = analogix_dp_ids, .probe = analogix_dp_probe, .priv_auto_alloc_size = sizeof(struct analogix_dp_device), };