diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig index 27e2022de89d..efd94e00c3e5 100644 --- a/drivers/gpu/drm/bridge/Kconfig +++ b/drivers/gpu/drm/bridge/Kconfig @@ -40,4 +40,6 @@ config DRM_PARADE_PS8622 ---help--- Parade eDP-LVDS bridge chip driver. +source "drivers/gpu/drm/bridge/analogix/Kconfig" + endmenu diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile index f13c33d67c03..ff821f4b5833 100644 --- a/drivers/gpu/drm/bridge/Makefile +++ b/drivers/gpu/drm/bridge/Makefile @@ -4,3 +4,4 @@ obj-$(CONFIG_DRM_DW_HDMI) += dw-hdmi.o obj-$(CONFIG_DRM_DW_HDMI_AHB_AUDIO) += dw-hdmi-ahb-audio.o obj-$(CONFIG_DRM_NXP_PTN3460) += nxp-ptn3460.o obj-$(CONFIG_DRM_PARADE_PS8622) += parade-ps8622.o +obj-$(CONFIG_DRM_ANALOGIX_DP) += analogix/ diff --git a/drivers/gpu/drm/bridge/analogix/Kconfig b/drivers/gpu/drm/bridge/analogix/Kconfig new file mode 100644 index 000000000000..80f286fa3a69 --- /dev/null +++ b/drivers/gpu/drm/bridge/analogix/Kconfig @@ -0,0 +1,3 @@ +config DRM_ANALOGIX_DP + tristate + depends on DRM diff --git a/drivers/gpu/drm/bridge/analogix/Makefile b/drivers/gpu/drm/bridge/analogix/Makefile new file mode 100644 index 000000000000..cd4010ba6890 --- /dev/null +++ b/drivers/gpu/drm/bridge/analogix/Makefile @@ -0,0 +1,2 @@ +analogix_dp-objs := analogix_dp_core.o analogix_dp_reg.o +obj-$(CONFIG_DRM_ANALOGIX_DP) += analogix_dp.o diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c new file mode 100644 index 000000000000..392c29691d34 --- /dev/null +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c @@ -0,0 +1,1351 @@ +/* +* Analogix DP (Display Port) core interface driver. +* +* Copyright (C) 2012 Samsung Electronics Co., Ltd. +* Author: Jingoo Han <jg1.han@samsung.com> +* +* This program is free software; you can redistribute it and/or modify it +* under the terms of the GNU General Public License as published by the +* Free Software Foundation; either version 2 of the License, or (at your +* option) any later version. +*/ + +#include <linux/module.h> +#include <linux/platform_device.h> +#include <linux/err.h> +#include <linux/clk.h> +#include <linux/io.h> +#include <linux/interrupt.h> +#include <linux/of.h> +#include <linux/of_gpio.h> +#include <linux/gpio.h> +#include <linux/component.h> +#include <linux/phy/phy.h> + +#include <drm/drmP.h> +#include <drm/drm_atomic_helper.h> +#include <drm/drm_crtc.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_panel.h> + +#include <drm/bridge/analogix_dp.h> + +#include "analogix_dp_core.h" + +#define to_dp(nm) container_of(nm, struct analogix_dp_device, nm) + +struct bridge_init { + struct i2c_client *client; + struct device_node *node; +}; + +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 int analogix_dp_detect_hpd(struct analogix_dp_device *dp) +{ + int timeout_loop = 0; + + while (analogix_dp_get_plug_in_status(dp) != 0) { + timeout_loop++; + if (DP_TIMEOUT_LOOP_COUNT < timeout_loop) { + dev_err(dp->dev, "failed to get hpd plug status\n"); + return -ETIMEDOUT; + } + usleep_range(10, 11); + } + + return 0; +} + +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[EDID_BLOCK_LENGTH * 2]; + unsigned int extend_block = 0; + unsigned char sum; + 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) { + dev_dbg(dp->dev, "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) { + dev_err(dp->dev, "EDID Read failed!\n"); + return -EIO; + } + sum = analogix_dp_calc_edid_check_sum(edid); + if (sum != 0) { + dev_err(dp->dev, "EDID bad checksum!\n"); + return -EIO; + } + + /* 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) { + dev_err(dp->dev, "EDID Read failed!\n"); + return -EIO; + } + sum = analogix_dp_calc_edid_check_sum(&edid[EDID_BLOCK_LENGTH]); + if (sum != 0) { + dev_err(dp->dev, "EDID bad checksum!\n"); + return -EIO; + } + + 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) { + dev_err(dp->dev, "EDID Read failed!\n"); + return -EIO; + } + sum = analogix_dp_calc_edid_check_sum(edid); + if (sum != 0) { + dev_err(dp->dev, "EDID bad checksum!\n"); + return -EIO; + } + + 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); + } + } + + dev_dbg(dp->dev, "EDID Read success!\n"); + return 0; +} + +static int analogix_dp_handle_edid(struct analogix_dp_device *dp) +{ + u8 buf[12]; + int i; + int retval; + + /* Read DPCD DP_DPCD_REV~RECEIVE_PORT1_CAP_1 */ + retval = analogix_dp_read_bytes_from_dpcd(dp, DP_DPCD_REV, + 12, buf); + if (retval) + return retval; + + /* Read EDID */ + for (i = 0; i < 3; i++) { + retval = analogix_dp_read_edid(dp); + if (!retval) + break; + } + + return retval; +} + +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 void analogix_dp_set_lane_lane_pre_emphasis(struct analogix_dp_device *dp, + int pre_emphasis, int lane) +{ + switch (lane) { + case 0: + analogix_dp_set_lane0_pre_emphasis(dp, pre_emphasis); + break; + case 1: + analogix_dp_set_lane1_pre_emphasis(dp, pre_emphasis); + break; + + case 2: + analogix_dp_set_lane2_pre_emphasis(dp, pre_emphasis); + break; + + case 3: + analogix_dp_set_lane3_pre_emphasis(dp, pre_emphasis); + break; + } +} + +static int analogix_dp_link_start(struct analogix_dp_device *dp) +{ + u8 buf[4]; + int lane, lane_count, pll_tries, 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; + + /* Set TX pre-emphasis to minimum */ + for (lane = 0; lane < lane_count; lane++) + analogix_dp_set_lane_lane_pre_emphasis(dp, + PRE_EMPHASIS_LEVEL_0, lane); + + /* Wait for PLL lock */ + pll_tries = 0; + while (analogix_dp_get_pll_lock_status(dp) == PLL_UNLOCKED) { + if (pll_tries == DP_TIMEOUT_LOOP_COUNT) { + dev_err(dp->dev, "Wait for PLL lock timed out\n"); + return -ETIMEDOUT; + } + + pll_tries++; + usleep_range(90, 120); + } + + /* 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_set_lane_link_training(struct analogix_dp_device *dp, + u8 training_lane_set, int lane) +{ + switch (lane) { + case 0: + analogix_dp_set_lane0_link_training(dp, training_lane_set); + break; + case 1: + analogix_dp_set_lane1_link_training(dp, training_lane_set); + break; + + case 2: + analogix_dp_set_lane2_link_training(dp, training_lane_set); + break; + + case 3: + analogix_dp_set_lane3_link_training(dp, training_lane_set); + break; + } +} + +static unsigned int analogix_dp_get_lane_link_training( + struct analogix_dp_device *dp, + int lane) +{ + u32 reg; + + switch (lane) { + case 0: + reg = analogix_dp_get_lane0_link_training(dp); + break; + case 1: + reg = analogix_dp_get_lane1_link_training(dp); + break; + case 2: + reg = analogix_dp_get_lane2_link_training(dp); + break; + case 3: + reg = analogix_dp_get_lane3_link_training(dp); + break; + default: + WARN_ON(1); + return 0; + } + + return reg; +} + +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 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]; + + usleep_range(100, 101); + + 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; + + retval = analogix_dp_read_bytes_from_dpcd(dp, + DP_ADJUST_REQUEST_LANE0_1, 2, adjust_request); + if (retval) + return retval; + + if (analogix_dp_clock_recovery_ok(link_status, lane_count) == 0) { + /* set training pattern 2 for EQ */ + analogix_dp_set_training_pattern(dp, TRAINING_PTN2); + + retval = analogix_dp_write_byte_to_dpcd(dp, + DP_TRAINING_PATTERN_SET, + DP_LINK_SCRAMBLING_DISABLE | + 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; + } else { + 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); + + for (lane = 0; lane < lane_count; lane++) + analogix_dp_set_lane_link_training(dp, + dp->link_train.training_lane[lane], lane); + + 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, lane_count, retval; + u32 reg; + u8 link_align, link_status[2], adjust_request[2]; + + usleep_range(400, 401); + + 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_bytes_from_dpcd(dp, + DP_ADJUST_REQUEST_LANE0_1, 2, adjust_request); + if (retval) + return retval; + + retval = analogix_dp_read_byte_from_dpcd(dp, + DP_LANE_ALIGN_STATUS_UPDATED, &link_align); + if (retval) + return retval; + + analogix_dp_get_adjust_training_lane(dp, adjust_request); + + if (!analogix_dp_channel_eq_ok(link_status, link_align, lane_count)) { + /* traing pattern Set to Normal */ + analogix_dp_training_pattern_dis(dp); + + dev_info(dp->dev, "Link Training success!\n"); + + analogix_dp_get_link_bandwidth(dp, ®); + dp->link_train.link_rate = reg; + dev_dbg(dp->dev, "final bandwidth = %.2x\n", + dp->link_train.link_rate); + + analogix_dp_get_lane_count(dp, ®); + dp->link_train.lane_count = reg; + dev_dbg(dp->dev, "final lane count = %.2x\n", + 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_err(dp->dev, "EQ Max loop\n"); + analogix_dp_reduce_link_rate(dp); + return -EIO; + } + + for (lane = 0; lane < lane_count; lane++) + analogix_dp_set_lane_link_training(dp, + dp->link_train.training_lane[lane], lane); + + 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 + */ + 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 void analogix_dp_init_training(struct analogix_dp_device *dp, + enum link_lane_count_type max_lane, + enum link_rate_type max_rate) +{ + /* + * 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); + + if ((dp->link_train.link_rate != LINK_RATE_1_62GBPS) && + (dp->link_train.link_rate != LINK_RATE_2_70GBPS)) { + dev_err(dp->dev, "Rx Max Link Rate is abnormal :%x !\n", + dp->link_train.link_rate); + dp->link_train.link_rate = LINK_RATE_1_62GBPS; + } + + if (dp->link_train.lane_count == 0) { + dev_err(dp->dev, "Rx Max Lane count is abnormal :%x !\n", + dp->link_train.lane_count); + dp->link_train.lane_count = (u8)LANE_COUNT1; + } + + /* Setup TX lane count & rate */ + if (dp->link_train.lane_count > max_lane) + dp->link_train.lane_count = max_lane; + if (dp->link_train.link_rate > max_rate) + dp->link_train.link_rate = max_rate; + + /* All DP analog module power up */ + analogix_dp_set_analog_power_down(dp, POWER_ALL, 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; + } + } + if (retval) + dev_err(dp->dev, "eDP link training failed (%d)\n", retval); + + return retval; +} + +static int analogix_dp_set_link_train(struct analogix_dp_device *dp, + u32 count, + u32 bwtype) +{ + int i; + int retval; + + for (i = 0; i < DP_TIMEOUT_LOOP_COUNT; i++) { + analogix_dp_init_training(dp, count, bwtype); + retval = analogix_dp_sw_link_training(dp); + if (retval == 0) + break; + + usleep_range(100, 110); + } + + return retval; +} + +static int analogix_dp_config_video(struct analogix_dp_device *dp) +{ + int retval = 0; + 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 (DP_TIMEOUT_LOOP_COUNT < timeout_loop) { + dev_err(dp->dev, "Timeout of video streamclk ok\n"); + return -ETIMEDOUT; + } + + usleep_range(1, 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_CAPTURE); + + /* Disable video mute */ + analogix_dp_enable_video_mute(dp, 0); + + /* Configure video slave mode */ + analogix_dp_enable_video_master(dp, 0); + + 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 (DP_TIMEOUT_LOOP_COUNT < timeout_loop) { + dev_err(dp->dev, "Timeout of video streamclk ok\n"); + return -ETIMEDOUT; + } + + usleep_range(1000, 1001); + } + + if (retval != 0) + dev_err(dp->dev, "Video stream is not detected!\n"); + + return retval; +} + +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 irqreturn_t analogix_dp_irq_handler(int irq, void *arg) +{ + struct analogix_dp_device *dp = arg; + + enum dp_irq_type irq_type; + + irq_type = analogix_dp_get_irq_type(dp); + switch (irq_type) { + case DP_IRQ_TYPE_HP_CABLE_IN: + dev_dbg(dp->dev, "Received irq - cable in\n"); + schedule_work(&dp->hotplug_work); + analogix_dp_clear_hotplug_interrupts(dp); + break; + case DP_IRQ_TYPE_HP_CABLE_OUT: + dev_dbg(dp->dev, "Received irq - cable out\n"); + analogix_dp_clear_hotplug_interrupts(dp); + break; + case DP_IRQ_TYPE_HP_CHANGE: + /* + * We get these change notifications once in a while, but there + * is nothing we can do with them. Just ignore it for now and + * only handle cable changes. + */ + dev_dbg(dp->dev, "Received irq - hotplug change; ignoring.\n"); + analogix_dp_clear_hotplug_interrupts(dp); + break; + default: + dev_err(dp->dev, "Received irq - unknown type!\n"); + break; + } + return IRQ_HANDLED; +} + +static void analogix_dp_hotplug(struct work_struct *work) +{ + struct analogix_dp_device *dp; + + dp = container_of(work, struct analogix_dp_device, hotplug_work); + + if (dp->drm_dev) + drm_helper_hpd_irq_event(dp->drm_dev); +} + +static void analogix_dp_commit(struct analogix_dp_device *dp) +{ + int ret; + + /* Keep the panel disabled while we configure video */ + if (dp->plat_data->panel) { + if (drm_panel_disable(dp->plat_data->panel)) + DRM_ERROR("failed to disable the panel\n"); + } + + ret = analogix_dp_detect_hpd(dp); + if (ret) { + /* Cable has been disconnected, we're done */ + return; + } + + ret = analogix_dp_handle_edid(dp); + if (ret) { + dev_err(dp->dev, "unable to handle edid\n"); + return; + } + + ret = analogix_dp_set_link_train(dp, dp->video_info->lane_count, + dp->video_info->link_rate); + if (ret) { + dev_err(dp->dev, "unable to do link train\n"); + return; + } + + analogix_dp_enable_scramble(dp, 1); + analogix_dp_enable_rx_to_enhanced_mode(dp, 1); + analogix_dp_enable_enhanced_mode(dp, 1); + + analogix_dp_set_lane_count(dp, dp->video_info->lane_count); + analogix_dp_set_link_bandwidth(dp, dp->video_info->link_rate); + + analogix_dp_init_video(dp); + ret = analogix_dp_config_video(dp); + if (ret) + dev_err(dp->dev, "unable to config video\n"); + + /* Safe to enable the panel now */ + if (dp->plat_data->panel) { + if (drm_panel_enable(dp->plat_data->panel)) + DRM_ERROR("failed to enable the panel\n"); + } + + /* Enable video */ + analogix_dp_start_video(dp); +} + +int analogix_dp_get_modes(struct drm_connector *connector) +{ + struct analogix_dp_device *dp = to_dp(connector); + int num_modes = 0; + + if (dp->plat_data->panel) + num_modes += drm_panel_get_modes(dp->plat_data->panel); + + if (dp->plat_data->get_modes) + num_modes += dp->plat_data->get_modes(dp->plat_data); + + return num_modes; +} + +static struct drm_encoder * +analogix_dp_best_encoder(struct drm_connector *connector) +{ + struct analogix_dp_device *dp = to_dp(connector); + + return dp->encoder; +} + +static const struct drm_connector_helper_funcs analogix_dp_connector_helper_funcs = { + .get_modes = analogix_dp_get_modes, + .best_encoder = analogix_dp_best_encoder, +}; + +enum drm_connector_status +analogix_dp_detect(struct drm_connector *connector, bool force) +{ + return connector_status_connected; +} + +static void analogix_dp_connector_destroy(struct drm_connector *connector) +{ + drm_connector_unregister(connector); + drm_connector_cleanup(connector); +} + +static const struct drm_connector_funcs analogix_dp_connector_funcs = { + .dpms = drm_atomic_helper_connector_dpms, + .fill_modes = drm_helper_probe_single_connector_modes, + .detect = analogix_dp_detect, + .destroy = analogix_dp_connector_destroy, + .reset = drm_atomic_helper_connector_reset, + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, +}; + +static int analogix_dp_bridge_attach(struct drm_bridge *bridge) +{ + struct analogix_dp_device *dp = bridge->driver_private; + struct drm_encoder *encoder = dp->encoder; + struct drm_connector *connector = &dp->connector; + int ret; + + if (!bridge->encoder) { + DRM_ERROR("Parent encoder object not found"); + return -ENODEV; + } + + connector->polled = DRM_CONNECTOR_POLL_HPD; + + ret = drm_connector_init(dp->drm_dev, connector, + &analogix_dp_connector_funcs, + DRM_MODE_CONNECTOR_eDP); + if (ret) { + DRM_ERROR("Failed to initialize connector with drm\n"); + return ret; + } + + drm_connector_helper_add(connector, + &analogix_dp_connector_helper_funcs); + drm_mode_connector_attach_encoder(connector, encoder); + + /* + * NOTE: the connector registration is implemented in analogix + * platform driver, that to say connector would be exist after + * plat_data->attch return, that's why we record the connector + * point after plat attached. + */ + if (dp->plat_data->attach) { + ret = dp->plat_data->attach(dp->plat_data, bridge, connector); + if (ret) { + DRM_ERROR("Failed at platform attch func\n"); + return ret; + } + } + + if (dp->plat_data->panel) { + ret = drm_panel_attach(dp->plat_data->panel, &dp->connector); + if (ret) { + DRM_ERROR("Failed to attach panel\n"); + return ret; + } + } + + return 0; +} + +static void analogix_dp_bridge_enable(struct drm_bridge *bridge) +{ + struct analogix_dp_device *dp = bridge->driver_private; + + if (dp->dpms_mode == DRM_MODE_DPMS_ON) + return; + + pm_runtime_get_sync(dp->dev); + + if (dp->plat_data->panel) { + if (drm_panel_prepare(dp->plat_data->panel)) { + DRM_ERROR("failed to setup the panel\n"); + return; + } + } + + if (dp->plat_data->power_on) + dp->plat_data->power_on(dp->plat_data); + + phy_power_on(dp->phy); + analogix_dp_init_dp(dp); + enable_irq(dp->irq); + analogix_dp_commit(dp); + + dp->dpms_mode = DRM_MODE_DPMS_ON; +} + +static void analogix_dp_bridge_disable(struct drm_bridge *bridge) +{ + struct analogix_dp_device *dp = bridge->driver_private; + + if (dp->dpms_mode != DRM_MODE_DPMS_ON) + return; + + if (dp->plat_data->panel) { + if (drm_panel_disable(dp->plat_data->panel)) { + DRM_ERROR("failed to disable the panel\n"); + return; + } + } + + disable_irq(dp->irq); + flush_work(&dp->hotplug_work); + phy_power_off(dp->phy); + + if (dp->plat_data->power_off) + dp->plat_data->power_off(dp->plat_data); + + if (dp->plat_data->panel) { + if (drm_panel_unprepare(dp->plat_data->panel)) + DRM_ERROR("failed to turnoff the panel\n"); + } + + pm_runtime_put_sync(dp->dev); + + dp->dpms_mode = DRM_MODE_DPMS_OFF; +} + +static void analogix_dp_bridge_nop(struct drm_bridge *bridge) +{ + /* do nothing */ +} + +static const struct drm_bridge_funcs analogix_dp_bridge_funcs = { + .enable = analogix_dp_bridge_enable, + .disable = analogix_dp_bridge_disable, + .pre_enable = analogix_dp_bridge_nop, + .post_disable = analogix_dp_bridge_nop, + .attach = analogix_dp_bridge_attach, +}; + +static int analogix_dp_create_bridge(struct drm_device *drm_dev, + struct analogix_dp_device *dp) +{ + struct drm_bridge *bridge; + int ret; + + bridge = devm_kzalloc(drm_dev->dev, sizeof(*bridge), GFP_KERNEL); + if (!bridge) { + DRM_ERROR("failed to allocate for drm bridge\n"); + return -ENOMEM; + } + + dp->bridge = bridge; + + dp->encoder->bridge = bridge; + bridge->driver_private = dp; + bridge->encoder = dp->encoder; + bridge->funcs = &analogix_dp_bridge_funcs; + + ret = drm_bridge_attach(drm_dev, bridge); + if (ret) { + DRM_ERROR("failed to attach drm bridge\n"); + return -EINVAL; + } + + return 0; +} + +static struct video_info *analogix_dp_dt_parse_pdata(struct device *dev) +{ + struct device_node *dp_node = dev->of_node; + struct video_info *dp_video_config; + + dp_video_config = devm_kzalloc(dev, + sizeof(*dp_video_config), GFP_KERNEL); + if (!dp_video_config) + return ERR_PTR(-ENOMEM); + + dp_video_config->h_sync_polarity = + of_property_read_bool(dp_node, "hsync-active-high"); + + dp_video_config->v_sync_polarity = + of_property_read_bool(dp_node, "vsync-active-high"); + + dp_video_config->interlaced = + of_property_read_bool(dp_node, "interlaced"); + + if (of_property_read_u32(dp_node, "samsung,color-space", + &dp_video_config->color_space)) { + dev_err(dev, "failed to get color-space\n"); + return ERR_PTR(-EINVAL); + } + + if (of_property_read_u32(dp_node, "samsung,dynamic-range", + &dp_video_config->dynamic_range)) { + dev_err(dev, "failed to get dynamic-range\n"); + return ERR_PTR(-EINVAL); + } + + if (of_property_read_u32(dp_node, "samsung,ycbcr-coeff", + &dp_video_config->ycbcr_coeff)) { + dev_err(dev, "failed to get ycbcr-coeff\n"); + return ERR_PTR(-EINVAL); + } + + if (of_property_read_u32(dp_node, "samsung,color-depth", + &dp_video_config->color_depth)) { + dev_err(dev, "failed to get color-depth\n"); + return ERR_PTR(-EINVAL); + } + + if (of_property_read_u32(dp_node, "samsung,link-rate", + &dp_video_config->link_rate)) { + dev_err(dev, "failed to get link-rate\n"); + return ERR_PTR(-EINVAL); + } + + if (of_property_read_u32(dp_node, "samsung,lane-count", + &dp_video_config->lane_count)) { + dev_err(dev, "failed to get lane-count\n"); + return ERR_PTR(-EINVAL); + } + + return dp_video_config; +} + +int analogix_dp_bind(struct device *dev, struct drm_device *drm_dev, + struct analogix_dp_plat_data *plat_data) +{ + struct platform_device *pdev = to_platform_device(dev); + struct analogix_dp_device *dp; + struct resource *res; + unsigned int irq_flags; + int ret; + + if (!plat_data) { + dev_err(dev, "Invalided input plat_data\n"); + return -EINVAL; + } + + dp = devm_kzalloc(dev, sizeof(struct analogix_dp_device), GFP_KERNEL); + if (!dp) + return -ENOMEM; + + dev_set_drvdata(dev, dp); + + dp->dev = &pdev->dev; + dp->dpms_mode = DRM_MODE_DPMS_OFF; + + /* + * platform dp driver need containor_of the plat_data to get + * the driver private data, so we need to store the point of + * plat_data, not the context of plat_data. + */ + dp->plat_data = plat_data; + + dp->video_info = analogix_dp_dt_parse_pdata(&pdev->dev); + if (IS_ERR(dp->video_info)) + return PTR_ERR(dp->video_info); + + dp->phy = devm_phy_get(dp->dev, "dp"); + if (IS_ERR(dp->phy)) { + dev_err(dp->dev, "no DP phy configured\n"); + ret = PTR_ERR(dp->phy); + if (ret) { + /* + * phy itself is not enabled, so we can move forward + * assigning NULL to phy pointer. + */ + if (ret == -ENOSYS || ret == -ENODEV) + dp->phy = NULL; + else + return ret; + } + } + + dp->clock = devm_clk_get(&pdev->dev, "dp"); + if (IS_ERR(dp->clock)) { + dev_err(&pdev->dev, "failed to get clock\n"); + return PTR_ERR(dp->clock); + } + + clk_prepare_enable(dp->clock); + + res = platform_get_resource(pdev, IORESOURCE_MEM, 0); + + dp->reg_base = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(dp->reg_base)) + return PTR_ERR(dp->reg_base); + + dp->hpd_gpio = of_get_named_gpio(dev->of_node, "hpd-gpios", 0); + if (!gpio_is_valid(dp->hpd_gpio)) + dp->hpd_gpio = of_get_named_gpio(dev->of_node, + "samsung,hpd-gpio", 0); + + if (gpio_is_valid(dp->hpd_gpio)) { + /* + * Set up the hotplug GPIO from the device tree as an interrupt. + * Simply specifying a different interrupt in the device tree + * doesn't work since we handle hotplug rather differently when + * using a GPIO. We also need the actual GPIO specifier so + * that we can get the current state of the GPIO. + */ + ret = devm_gpio_request_one(&pdev->dev, dp->hpd_gpio, GPIOF_IN, + "hpd_gpio"); + if (ret) { + dev_err(&pdev->dev, "failed to get hpd gpio\n"); + return ret; + } + dp->irq = gpio_to_irq(dp->hpd_gpio); + irq_flags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING; + } else { + dp->hpd_gpio = -ENODEV; + dp->irq = platform_get_irq(pdev, 0); + irq_flags = 0; + } + + if (dp->irq == -ENXIO) { + dev_err(&pdev->dev, "failed to get irq\n"); + return -ENODEV; + } + + INIT_WORK(&dp->hotplug_work, analogix_dp_hotplug); + + pm_runtime_enable(dev); + + ret = devm_request_irq(&pdev->dev, dp->irq, analogix_dp_irq_handler, + irq_flags, "analogix-dp", dp); + if (ret) { + dev_err(&pdev->dev, "failed to request irq\n"); + goto err_disable_pm_runtime; + } + disable_irq(dp->irq); + + dp->drm_dev = drm_dev; + dp->encoder = dp->plat_data->encoder; + + ret = analogix_dp_create_bridge(drm_dev, dp); + if (ret) { + DRM_ERROR("failed to create bridge (%d)\n", ret); + drm_encoder_cleanup(dp->encoder); + goto err_disable_pm_runtime; + } + + return 0; + +err_disable_pm_runtime: + pm_runtime_disable(dev); + + return ret; +} +EXPORT_SYMBOL_GPL(analogix_dp_bind); + +void analogix_dp_unbind(struct device *dev, struct device *master, + void *data) +{ + struct analogix_dp_device *dp = dev_get_drvdata(dev); + + analogix_dp_bridge_disable(dp->bridge); + pm_runtime_disable(dev); +} +EXPORT_SYMBOL_GPL(analogix_dp_unbind); + +#ifdef CONFIG_PM +int analogix_dp_suspend(struct device *dev) +{ + struct analogix_dp_device *dp = dev_get_drvdata(dev); + + clk_disable_unprepare(dp->clock); + return 0; +} +EXPORT_SYMBOL_GPL(analogix_dp_suspend); + +int analogix_dp_resume(struct device *dev) +{ + struct analogix_dp_device *dp = dev_get_drvdata(dev); + int ret; + + ret = clk_prepare_enable(dp->clock); + if (ret < 0) { + DRM_ERROR("Failed to prepare_enable the clock clk [%d]\n", ret); + return ret; + } + + return 0; +} +EXPORT_SYMBOL_GPL(analogix_dp_resume); +#endif + +MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>"); +MODULE_DESCRIPTION("Analogix DP Core Driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h new file mode 100644 index 000000000000..0fff7451e3df --- /dev/null +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h @@ -0,0 +1,277 @@ +/* + * Header file for Analogix DP (Display Port) core interface driver. + * + * Copyright (C) 2012 Samsung Electronics Co., Ltd. + * Author: Jingoo Han <jg1.han@samsung.com> + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ + +#ifndef _ANALOGIX_DP_CORE_H +#define _ANALOGIX_DP_CORE_H + +#include <drm/drm_crtc.h> +#include <drm/drm_dp_helper.h> + +#define DP_TIMEOUT_LOOP_COUNT 100 +#define MAX_CR_LOOP 5 +#define MAX_EQ_LOOP 5 + +enum link_rate_type { + LINK_RATE_1_62GBPS = 0x06, + LINK_RATE_2_70GBPS = 0x0a +}; + +enum link_lane_count_type { + LANE_COUNT1 = 1, + LANE_COUNT2 = 2, + LANE_COUNT4 = 4 +}; + +enum link_training_state { + START, + CLOCK_RECOVERY, + EQUALIZER_TRAINING, + FINISHED, + FAILED +}; + +enum voltage_swing_level { + VOLTAGE_LEVEL_0, + VOLTAGE_LEVEL_1, + VOLTAGE_LEVEL_2, + VOLTAGE_LEVEL_3, +}; + +enum pre_emphasis_level { + PRE_EMPHASIS_LEVEL_0, + PRE_EMPHASIS_LEVEL_1, + PRE_EMPHASIS_LEVEL_2, + PRE_EMPHASIS_LEVEL_3, +}; + +enum pattern_set { + PRBS7, + D10_2, + TRAINING_PTN1, + TRAINING_PTN2, + DP_NONE +}; + +enum color_space { + COLOR_RGB, + COLOR_YCBCR422, + COLOR_YCBCR444 +}; + +enum color_depth { + COLOR_6, + COLOR_8, + COLOR_10, + COLOR_12 +}; + +enum color_coefficient { + COLOR_YCBCR601, + COLOR_YCBCR709 +}; + +enum dynamic_range { + VESA, + CEA +}; + +enum pll_status { + PLL_UNLOCKED, + PLL_LOCKED +}; + +enum clock_recovery_m_value_type { + CALCULATED_M, + REGISTER_M +}; + +enum video_timing_recognition_type { + VIDEO_TIMING_FROM_CAPTURE, + VIDEO_TIMING_FROM_REGISTER +}; + +enum analog_power_block { + AUX_BLOCK, + CH0_BLOCK, + CH1_BLOCK, + CH2_BLOCK, + CH3_BLOCK, + ANALOG_TOTAL, + POWER_ALL +}; + +enum dp_irq_type { + DP_IRQ_TYPE_HP_CABLE_IN, + DP_IRQ_TYPE_HP_CABLE_OUT, + DP_IRQ_TYPE_HP_CHANGE, + DP_IRQ_TYPE_UNKNOWN, +}; + +struct video_info { + char *name; + + bool h_sync_polarity; + bool v_sync_polarity; + bool interlaced; + + enum color_space color_space; + enum dynamic_range dynamic_range; + enum color_coefficient ycbcr_coeff; + enum color_depth color_depth; + + enum link_rate_type link_rate; + enum link_lane_count_type lane_count; +}; + +struct link_train { + int eq_loop; + int cr_loop[4]; + + u8 link_rate; + u8 lane_count; + u8 training_lane[4]; + + enum link_training_state lt_state; +}; + +struct analogix_dp_device { + struct drm_encoder *encoder; + struct device *dev; + struct drm_device *drm_dev; + struct drm_connector connector; + struct drm_bridge *bridge; + struct clk *clock; + unsigned int irq; + void __iomem *reg_base; + + struct video_info *video_info; + struct link_train link_train; + struct work_struct hotplug_work; + struct phy *phy; + int dpms_mode; + int hpd_gpio; + + struct analogix_dp_plat_data *plat_data; +}; + +/* analogix_dp_reg.c */ +void analogix_dp_enable_video_mute(struct analogix_dp_device *dp, bool enable); +void analogix_dp_stop_video(struct analogix_dp_device *dp); +void analogix_dp_lane_swap(struct analogix_dp_device *dp, bool enable); +void analogix_dp_init_analog_param(struct analogix_dp_device *dp); +void analogix_dp_init_interrupt(struct analogix_dp_device *dp); +void analogix_dp_reset(struct analogix_dp_device *dp); +void analogix_dp_swreset(struct analogix_dp_device *dp); +void analogix_dp_config_interrupt(struct analogix_dp_device *dp); +enum pll_status analogix_dp_get_pll_lock_status(struct analogix_dp_device *dp); +void analogix_dp_set_pll_power_down(struct analogix_dp_device *dp, bool enable); +void analogix_dp_set_analog_power_down(struct analogix_dp_device *dp, + enum analog_power_block block, + bool enable); +void analogix_dp_init_analog_func(struct analogix_dp_device *dp); +void analogix_dp_init_hpd(struct analogix_dp_device *dp); +enum dp_irq_type analogix_dp_get_irq_type(struct analogix_dp_device *dp); +void analogix_dp_clear_hotplug_interrupts(struct analogix_dp_device *dp); +void analogix_dp_reset_aux(struct analogix_dp_device *dp); +void analogix_dp_init_aux(struct analogix_dp_device *dp); +int analogix_dp_get_plug_in_status(struct analogix_dp_device *dp); +void analogix_dp_enable_sw_function(struct analogix_dp_device *dp); +int analogix_dp_start_aux_transaction(struct analogix_dp_device *dp); +int analogix_dp_write_byte_to_dpcd(struct analogix_dp_device *dp, + unsigned int reg_addr, + unsigned char data); +int analogix_dp_read_byte_from_dpcd(struct analogix_dp_device *dp, + unsigned int reg_addr, + unsigned char *data); +int analogix_dp_write_bytes_to_dpcd(struct analogix_dp_device *dp, + unsigned int reg_addr, + unsigned int count, + unsigned char data[]); +int analogix_dp_read_bytes_from_dpcd(struct analogix_dp_device *dp, + unsigned int reg_addr, + unsigned int count, + unsigned char data[]); +int analogix_dp_select_i2c_device(struct analogix_dp_device *dp, + unsigned int device_addr, + unsigned int reg_addr); +int analogix_dp_read_byte_from_i2c(struct analogix_dp_device *dp, + unsigned int device_addr, + unsigned int reg_addr, + unsigned int *data); +int analogix_dp_read_bytes_from_i2c(struct analogix_dp_device *dp, + unsigned int device_addr, + unsigned int reg_addr, + unsigned int count, + unsigned char edid[]); +void analogix_dp_set_link_bandwidth(struct analogix_dp_device *dp, u32 bwtype); +void analogix_dp_get_link_bandwidth(struct analogix_dp_device *dp, u32 *bwtype); +void analogix_dp_set_lane_count(struct analogix_dp_device *dp, u32 count); +void analogix_dp_get_lane_count(struct analogix_dp_device *dp, u32 *count); +void analogix_dp_enable_enhanced_mode(struct analogix_dp_device *dp, bool enable); +void analogix_dp_set_training_pattern(struct analogix_dp_device *dp, + enum pattern_set pattern); +void analogix_dp_set_lane0_pre_emphasis(struct analogix_dp_device *dp, u32 level); +void analogix_dp_set_lane1_pre_emphasis(struct analogix_dp_device *dp, u32 level); +void analogix_dp_set_lane2_pre_emphasis(struct analogix_dp_device *dp, u32 level); +void analogix_dp_set_lane3_pre_emphasis(struct analogix_dp_device *dp, u32 level); +void analogix_dp_set_lane0_link_training(struct analogix_dp_device *dp, + u32 training_lane); +void analogix_dp_set_lane1_link_training(struct analogix_dp_device *dp, + u32 training_lane); +void analogix_dp_set_lane2_link_training(struct analogix_dp_device *dp, + u32 training_lane); +void analogix_dp_set_lane3_link_training(struct analogix_dp_device *dp, + u32 training_lane); +u32 analogix_dp_get_lane0_link_training(struct analogix_dp_device *dp); +u32 analogix_dp_get_lane1_link_training(struct analogix_dp_device *dp); +u32 analogix_dp_get_lane2_link_training(struct analogix_dp_device *dp); +u32 analogix_dp_get_lane3_link_training(struct analogix_dp_device *dp); +void analogix_dp_reset_macro(struct analogix_dp_device *dp); +void analogix_dp_init_video(struct analogix_dp_device *dp); + +void analogix_dp_set_video_color_format(struct analogix_dp_device *dp); +int analogix_dp_is_slave_video_stream_clock_on(struct analogix_dp_device *dp); +void analogix_dp_set_video_cr_mn(struct analogix_dp_device *dp, + enum clock_recovery_m_value_type type, + u32 m_value, + u32 n_value); +void analogix_dp_set_video_timing_mode(struct analogix_dp_device *dp, u32 type); +void analogix_dp_enable_video_master(struct analogix_dp_device *dp, bool enable); +void analogix_dp_start_video(struct analogix_dp_device *dp); +int analogix_dp_is_video_stream_on(struct analogix_dp_device *dp); +void analogix_dp_config_video_slave_mode(struct analogix_dp_device *dp); +void analogix_dp_enable_scrambling(struct analogix_dp_device *dp); +void analogix_dp_disable_scrambling(struct analogix_dp_device *dp); + +/* I2C EDID Chip ID, Slave Address */ +#define I2C_EDID_DEVICE_ADDR 0x50 +#define I2C_E_EDID_DEVICE_ADDR 0x30 + +#define EDID_BLOCK_LENGTH 0x80 +#define EDID_HEADER_PATTERN 0x00 +#define EDID_EXTENSION_FLAG 0x7e +#define EDID_CHECKSUM 0x7f + +/* DP_MAX_LANE_COUNT */ +#define DPCD_ENHANCED_FRAME_CAP(x) (((x) >> 7) & 0x1) +#define DPCD_MAX_LANE_COUNT(x) ((x) & 0x1f) + +/* DP_LANE_COUNT_SET */ +#define DPCD_LANE_COUNT_SET(x) ((x) & 0x1f) + +/* DP_TRAINING_LANE0_SET */ +#define DPCD_PRE_EMPHASIS_SET(x) (((x) & 0x3) << 3) +#define DPCD_PRE_EMPHASIS_GET(x) (((x) >> 3) & 0x3) +#define DPCD_VOLTAGE_SWING_SET(x) (((x) & 0x3) << 0) +#define DPCD_VOLTAGE_SWING_GET(x) (((x) >> 0) & 0x3) + +#endif /* _ANALOGIX_DP_CORE_H */ diff --git a/drivers/gpu/drm/exynos/exynos_dp_reg.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c similarity index 84% rename from drivers/gpu/drm/exynos/exynos_dp_reg.c rename to drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c index c1f87a2a9284..0b926ea38a22 100644 --- a/drivers/gpu/drm/exynos/exynos_dp_reg.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c @@ -1,5 +1,5 @@ /* - * Samsung DP (Display port) register interface driver. + * Analogix DP (Display port) core register interface driver. * * Copyright (C) 2012 Samsung Electronics Co., Ltd. * Author: Jingoo Han <jg1.han@samsung.com> @@ -15,8 +15,8 @@ #include <linux/delay.h> #include <linux/gpio.h> -#include "exynos_dp_core.h" -#include "exynos_dp_reg.h" +#include "analogix_dp_core.h" +#include "analogix_dp_reg.h" #define COMMON_INT_MASK_1 0 #define COMMON_INT_MASK_2 0 @@ -24,7 +24,7 @@ #define COMMON_INT_MASK_4 (HOTPLUG_CHG | HPD_LOST | PLUG) #define INT_STA_MASK INT_HPD -void exynos_dp_enable_video_mute(struct exynos_dp_device *dp, bool enable) +void analogix_dp_enable_video_mute(struct analogix_dp_device *dp, bool enable) { u32 reg; @@ -39,7 +39,7 @@ void exynos_dp_enable_video_mute(struct exynos_dp_device *dp, bool enable) } } -void exynos_dp_stop_video(struct exynos_dp_device *dp) +void analogix_dp_stop_video(struct analogix_dp_device *dp) { u32 reg; @@ -48,7 +48,7 @@ void exynos_dp_stop_video(struct exynos_dp_device *dp) writel(reg, dp->reg_base + EXYNOS_DP_VIDEO_CTL_1); } -void exynos_dp_lane_swap(struct exynos_dp_device *dp, bool enable) +void analogix_dp_lane_swap(struct analogix_dp_device *dp, bool enable) { u32 reg; @@ -62,7 +62,7 @@ void exynos_dp_lane_swap(struct exynos_dp_device *dp, bool enable) writel(reg, dp->reg_base + EXYNOS_DP_LANE_MAP); } -void exynos_dp_init_analog_param(struct exynos_dp_device *dp) +void analogix_dp_init_analog_param(struct analogix_dp_device *dp) { u32 reg; @@ -84,7 +84,7 @@ void exynos_dp_init_analog_param(struct exynos_dp_device *dp) writel(reg, dp->reg_base + EXYNOS_DP_TX_AMP_TUNING_CTL); } -void exynos_dp_init_interrupt(struct exynos_dp_device *dp) +void analogix_dp_init_interrupt(struct analogix_dp_device *dp) { /* Set interrupt pin assertion polarity as high */ writel(INT_POL1 | INT_POL0, dp->reg_base + EXYNOS_DP_INT_CTL); @@ -104,12 +104,12 @@ void exynos_dp_init_interrupt(struct exynos_dp_device *dp) writel(0x00, dp->reg_base + EXYNOS_DP_INT_STA_MASK); } -void exynos_dp_reset(struct exynos_dp_device *dp) +void analogix_dp_reset(struct analogix_dp_device *dp) { u32 reg; - exynos_dp_stop_video(dp); - exynos_dp_enable_video_mute(dp, 0); + analogix_dp_stop_video(dp); + analogix_dp_enable_video_mute(dp, 0); reg = MASTER_VID_FUNC_EN_N | SLAVE_VID_FUNC_EN_N | AUD_FIFO_FUNC_EN_N | AUD_FUNC_EN_N | @@ -123,7 +123,7 @@ void exynos_dp_reset(struct exynos_dp_device *dp) usleep_range(20, 30); - exynos_dp_lane_swap(dp, 0); + analogix_dp_lane_swap(dp, 0); writel(0x0, dp->reg_base + EXYNOS_DP_SYS_CTL_1); writel(0x40, dp->reg_base + EXYNOS_DP_SYS_CTL_2); @@ -149,12 +149,12 @@ void exynos_dp_reset(struct exynos_dp_device *dp) writel(0x00000101, dp->reg_base + EXYNOS_DP_SOC_GENERAL_CTL); } -void exynos_dp_swreset(struct exynos_dp_device *dp) +void analogix_dp_swreset(struct analogix_dp_device *dp) { writel(RESET_DP_TX, dp->reg_base + EXYNOS_DP_TX_SW_RESET); } -void exynos_dp_config_interrupt(struct exynos_dp_device *dp) +void analogix_dp_config_interrupt(struct analogix_dp_device *dp) { u32 reg; @@ -175,7 +175,7 @@ void exynos_dp_config_interrupt(struct exynos_dp_device *dp) writel(reg, dp->reg_base + EXYNOS_DP_INT_STA_MASK); } -enum pll_status exynos_dp_get_pll_lock_status(struct exynos_dp_device *dp) +enum pll_status analogix_dp_get_pll_lock_status(struct analogix_dp_device *dp) { u32 reg; @@ -186,7 +186,7 @@ enum pll_status exynos_dp_get_pll_lock_status(struct exynos_dp_device *dp) return PLL_UNLOCKED; } -void exynos_dp_set_pll_power_down(struct exynos_dp_device *dp, bool enable) +void analogix_dp_set_pll_power_down(struct analogix_dp_device *dp, bool enable) { u32 reg; @@ -201,7 +201,7 @@ void exynos_dp_set_pll_power_down(struct exynos_dp_device *dp, bool enable) } } -void exynos_dp_set_analog_power_down(struct exynos_dp_device *dp, +void analogix_dp_set_analog_power_down(struct analogix_dp_device *dp, enum analog_power_block block, bool enable) { @@ -288,12 +288,12 @@ void exynos_dp_set_analog_power_down(struct exynos_dp_device *dp, } } -void exynos_dp_init_analog_func(struct exynos_dp_device *dp) +void analogix_dp_init_analog_func(struct analogix_dp_device *dp) { u32 reg; int timeout_loop = 0; - exynos_dp_set_analog_power_down(dp, POWER_ALL, 0); + analogix_dp_set_analog_power_down(dp, POWER_ALL, 0); reg = PLL_LOCK_CHG; writel(reg, dp->reg_base + EXYNOS_DP_COMMON_INT_STA_1); @@ -303,10 +303,10 @@ void exynos_dp_init_analog_func(struct exynos_dp_device *dp) writel(reg, dp->reg_base + EXYNOS_DP_DEBUG_CTL); /* Power up PLL */ - if (exynos_dp_get_pll_lock_status(dp) == PLL_UNLOCKED) { - exynos_dp_set_pll_power_down(dp, 0); + if (analogix_dp_get_pll_lock_status(dp) == PLL_UNLOCKED) { + analogix_dp_set_pll_power_down(dp, 0); - while (exynos_dp_get_pll_lock_status(dp) == PLL_UNLOCKED) { + while (analogix_dp_get_pll_lock_status(dp) == PLL_UNLOCKED) { timeout_loop++; if (DP_TIMEOUT_LOOP_COUNT < timeout_loop) { dev_err(dp->dev, "failed to get pll lock status\n"); @@ -323,7 +323,7 @@ void exynos_dp_init_analog_func(struct exynos_dp_device *dp) writel(reg, dp->reg_base + EXYNOS_DP_FUNC_EN_2); } -void exynos_dp_clear_hotplug_interrupts(struct exynos_dp_device *dp) +void analogix_dp_clear_hotplug_interrupts(struct analogix_dp_device *dp) { u32 reg; @@ -337,21 +337,21 @@ void exynos_dp_clear_hotplug_interrupts(struct exynos_dp_device *dp) writel(reg, dp->reg_base + EXYNOS_DP_INT_STA); } -void exynos_dp_init_hpd(struct exynos_dp_device *dp) +void analogix_dp_init_hpd(struct analogix_dp_device *dp) { u32 reg; if (gpio_is_valid(dp->hpd_gpio)) return; - exynos_dp_clear_hotplug_interrupts(dp); + analogix_dp_clear_hotplug_interrupts(dp); reg = readl(dp->reg_base + EXYNOS_DP_SYS_CTL_3); reg &= ~(F_HPD | HPD_CTRL); writel(reg, dp->reg_base + EXYNOS_DP_SYS_CTL_3); } -enum dp_irq_type exynos_dp_get_irq_type(struct exynos_dp_device *dp) +enum dp_irq_type analogix_dp_get_irq_type(struct analogix_dp_device *dp) { u32 reg; @@ -378,7 +378,7 @@ enum dp_irq_type exynos_dp_get_irq_type(struct exynos_dp_device *dp) } } -void exynos_dp_reset_aux(struct exynos_dp_device *dp) +void analogix_dp_reset_aux(struct analogix_dp_device *dp) { u32 reg; @@ -388,7 +388,7 @@ void exynos_dp_reset_aux(struct exynos_dp_device *dp) writel(reg, dp->reg_base + EXYNOS_DP_FUNC_EN_2); } -void exynos_dp_init_aux(struct exynos_dp_device *dp) +void analogix_dp_init_aux(struct analogix_dp_device *dp) { u32 reg; @@ -396,7 +396,7 @@ void exynos_dp_init_aux(struct exynos_dp_device *dp) reg = RPLY_RECEIV | AUX_ERR; writel(reg, dp->reg_base + EXYNOS_DP_INT_STA); - exynos_dp_reset_aux(dp); + analogix_dp_reset_aux(dp); /* Disable AUX transaction H/W retry */ reg = AUX_BIT_PERIOD_EXPECTED_DELAY(3) | AUX_HW_RETRY_COUNT_SEL(0)| @@ -413,7 +413,7 @@ void exynos_dp_init_aux(struct exynos_dp_device *dp) writel(reg, dp->reg_base + EXYNOS_DP_FUNC_EN_2); } -int exynos_dp_get_plug_in_status(struct exynos_dp_device *dp) +int analogix_dp_get_plug_in_status(struct analogix_dp_device *dp) { u32 reg; @@ -429,7 +429,7 @@ int exynos_dp_get_plug_in_status(struct exynos_dp_device *dp) return -EINVAL; } -void exynos_dp_enable_sw_function(struct exynos_dp_device *dp) +void analogix_dp_enable_sw_function(struct analogix_dp_device *dp) { u32 reg; @@ -438,7 +438,7 @@ void exynos_dp_enable_sw_function(struct exynos_dp_device *dp) writel(reg, dp->reg_base + EXYNOS_DP_FUNC_EN_1); } -int exynos_dp_start_aux_transaction(struct exynos_dp_device *dp) +int analogix_dp_start_aux_transaction(struct analogix_dp_device *dp) { int reg; int retval = 0; @@ -482,7 +482,7 @@ int exynos_dp_start_aux_transaction(struct exynos_dp_device *dp) return retval; } -int exynos_dp_write_byte_to_dpcd(struct exynos_dp_device *dp, +int analogix_dp_write_byte_to_dpcd(struct analogix_dp_device *dp, unsigned int reg_addr, unsigned char data) { @@ -516,7 +516,7 @@ int exynos_dp_write_byte_to_dpcd(struct exynos_dp_device *dp, writel(reg, dp->reg_base + EXYNOS_DP_AUX_CH_CTL_1); /* Start AUX transaction */ - retval = exynos_dp_start_aux_transaction(dp); + retval = analogix_dp_start_aux_transaction(dp); if (retval == 0) break; else @@ -527,7 +527,7 @@ int exynos_dp_write_byte_to_dpcd(struct exynos_dp_device *dp, return retval; } -int exynos_dp_read_byte_from_dpcd(struct exynos_dp_device *dp, +int analogix_dp_read_byte_from_dpcd(struct analogix_dp_device *dp, unsigned int reg_addr, unsigned char *data) { @@ -557,7 +557,7 @@ int exynos_dp_read_byte_from_dpcd(struct exynos_dp_device *dp, writel(reg, dp->reg_base + EXYNOS_DP_AUX_CH_CTL_1); /* Start AUX transaction */ - retval = exynos_dp_start_aux_transaction(dp); + retval = analogix_dp_start_aux_transaction(dp); if (retval == 0) break; else @@ -572,7 +572,7 @@ int exynos_dp_read_byte_from_dpcd(struct exynos_dp_device *dp, return retval; } -int exynos_dp_write_bytes_to_dpcd(struct exynos_dp_device *dp, +int analogix_dp_write_bytes_to_dpcd(struct analogix_dp_device *dp, unsigned int reg_addr, unsigned int count, unsigned char data[]) @@ -622,7 +622,7 @@ int exynos_dp_write_bytes_to_dpcd(struct exynos_dp_device *dp, writel(reg, dp->reg_base + EXYNOS_DP_AUX_CH_CTL_1); /* Start AUX transaction */ - retval = exynos_dp_start_aux_transaction(dp); + retval = analogix_dp_start_aux_transaction(dp); if (retval == 0) break; else @@ -636,7 +636,7 @@ int exynos_dp_write_bytes_to_dpcd(struct exynos_dp_device *dp, return retval; } -int exynos_dp_read_bytes_from_dpcd(struct exynos_dp_device *dp, +int analogix_dp_read_bytes_from_dpcd(struct analogix_dp_device *dp, unsigned int reg_addr, unsigned int count, unsigned char data[]) @@ -680,7 +680,7 @@ int exynos_dp_read_bytes_from_dpcd(struct exynos_dp_device *dp, writel(reg, dp->reg_base + EXYNOS_DP_AUX_CH_CTL_1); /* Start AUX transaction */ - retval = exynos_dp_start_aux_transaction(dp); + retval = analogix_dp_start_aux_transaction(dp); if (retval == 0) break; else @@ -702,7 +702,7 @@ int exynos_dp_read_bytes_from_dpcd(struct exynos_dp_device *dp, return retval; } -int exynos_dp_select_i2c_device(struct exynos_dp_device *dp, +int analogix_dp_select_i2c_device(struct analogix_dp_device *dp, unsigned int device_addr, unsigned int reg_addr) { @@ -728,14 +728,14 @@ int exynos_dp_select_i2c_device(struct exynos_dp_device *dp, writel(reg, dp->reg_base + EXYNOS_DP_AUX_CH_CTL_1); /* Start AUX transaction */ - retval = exynos_dp_start_aux_transaction(dp); + retval = analogix_dp_start_aux_transaction(dp); if (retval != 0) dev_dbg(dp->dev, "%s: Aux Transaction fail!\n", __func__); return retval; } -int exynos_dp_read_byte_from_i2c(struct exynos_dp_device *dp, +int analogix_dp_read_byte_from_i2c(struct analogix_dp_device *dp, unsigned int device_addr, unsigned int reg_addr, unsigned int *data) @@ -750,7 +750,7 @@ int exynos_dp_read_byte_from_i2c(struct exynos_dp_device *dp, writel(reg, dp->reg_base + EXYNOS_DP_BUFFER_DATA_CTL); /* Select EDID device */ - retval = exynos_dp_select_i2c_device(dp, device_addr, reg_addr); + retval = analogix_dp_select_i2c_device(dp, device_addr, reg_addr); if (retval != 0) continue; @@ -764,7 +764,7 @@ int exynos_dp_read_byte_from_i2c(struct exynos_dp_device *dp, writel(reg, dp->reg_base + EXYNOS_DP_AUX_CH_CTL_1); /* Start AUX transaction */ - retval = exynos_dp_start_aux_transaction(dp); + retval = analogix_dp_start_aux_transaction(dp); if (retval == 0) break; else @@ -779,7 +779,7 @@ int exynos_dp_read_byte_from_i2c(struct exynos_dp_device *dp, return retval; } -int exynos_dp_read_bytes_from_i2c(struct exynos_dp_device *dp, +int analogix_dp_read_bytes_from_i2c(struct analogix_dp_device *dp, unsigned int device_addr, unsigned int reg_addr, unsigned int count, @@ -807,7 +807,7 @@ int exynos_dp_read_bytes_from_i2c(struct exynos_dp_device *dp, * request without sending address */ if (!defer) - retval = exynos_dp_select_i2c_device(dp, + retval = analogix_dp_select_i2c_device(dp, device_addr, reg_addr + i); else defer = 0; @@ -825,7 +825,7 @@ int exynos_dp_read_bytes_from_i2c(struct exynos_dp_device *dp, EXYNOS_DP_AUX_CH_CTL_1); /* Start AUX transaction */ - retval = exynos_dp_start_aux_transaction(dp); + retval = analogix_dp_start_aux_transaction(dp); if (retval == 0) break; else @@ -852,7 +852,7 @@ int exynos_dp_read_bytes_from_i2c(struct exynos_dp_device *dp, return retval; } -void exynos_dp_set_link_bandwidth(struct exynos_dp_device *dp, u32 bwtype) +void analogix_dp_set_link_bandwidth(struct analogix_dp_device *dp, u32 bwtype) { u32 reg; @@ -861,7 +861,7 @@ void exynos_dp_set_link_bandwidth(struct exynos_dp_device *dp, u32 bwtype) writel(reg, dp->reg_base + EXYNOS_DP_LINK_BW_SET); } -void exynos_dp_get_link_bandwidth(struct exynos_dp_device *dp, u32 *bwtype) +void analogix_dp_get_link_bandwidth(struct analogix_dp_device *dp, u32 *bwtype) { u32 reg; @@ -869,7 +869,7 @@ void exynos_dp_get_link_bandwidth(struct exynos_dp_device *dp, u32 *bwtype) *bwtype = reg; } -void exynos_dp_set_lane_count(struct exynos_dp_device *dp, u32 count) +void analogix_dp_set_lane_count(struct analogix_dp_device *dp, u32 count) { u32 reg; @@ -877,7 +877,7 @@ void exynos_dp_set_lane_count(struct exynos_dp_device *dp, u32 count) writel(reg, dp->reg_base + EXYNOS_DP_LANE_COUNT_SET); } -void exynos_dp_get_lane_count(struct exynos_dp_device *dp, u32 *count) +void analogix_dp_get_lane_count(struct analogix_dp_device *dp, u32 *count) { u32 reg; @@ -885,7 +885,7 @@ void exynos_dp_get_lane_count(struct exynos_dp_device *dp, u32 *count) *count = reg; } -void exynos_dp_enable_enhanced_mode(struct exynos_dp_device *dp, bool enable) +void analogix_dp_enable_enhanced_mode(struct analogix_dp_device *dp, bool enable) { u32 reg; @@ -900,8 +900,8 @@ void exynos_dp_enable_enhanced_mode(struct exynos_dp_device *dp, bool enable) } } -void exynos_dp_set_training_pattern(struct exynos_dp_device *dp, - enum pattern_set pattern) +void analogix_dp_set_training_pattern(struct analogix_dp_device *dp, + enum pattern_set pattern) { u32 reg; @@ -933,7 +933,7 @@ void exynos_dp_set_training_pattern(struct exynos_dp_device *dp, } } -void exynos_dp_set_lane0_pre_emphasis(struct exynos_dp_device *dp, u32 level) +void analogix_dp_set_lane0_pre_emphasis(struct analogix_dp_device *dp, u32 level) { u32 reg; @@ -943,7 +943,7 @@ void exynos_dp_set_lane0_pre_emphasis(struct exynos_dp_device *dp, u32 level) writel(reg, dp->reg_base + EXYNOS_DP_LN0_LINK_TRAINING_CTL); } -void exynos_dp_set_lane1_pre_emphasis(struct exynos_dp_device *dp, u32 level) +void analogix_dp_set_lane1_pre_emphasis(struct analogix_dp_device *dp, u32 level) { u32 reg; @@ -953,7 +953,7 @@ void exynos_dp_set_lane1_pre_emphasis(struct exynos_dp_device *dp, u32 level) writel(reg, dp->reg_base + EXYNOS_DP_LN1_LINK_TRAINING_CTL); } -void exynos_dp_set_lane2_pre_emphasis(struct exynos_dp_device *dp, u32 level) +void analogix_dp_set_lane2_pre_emphasis(struct analogix_dp_device *dp, u32 level) { u32 reg; @@ -963,7 +963,7 @@ void exynos_dp_set_lane2_pre_emphasis(struct exynos_dp_device *dp, u32 level) writel(reg, dp->reg_base + EXYNOS_DP_LN2_LINK_TRAINING_CTL); } -void exynos_dp_set_lane3_pre_emphasis(struct exynos_dp_device *dp, u32 level) +void analogix_dp_set_lane3_pre_emphasis(struct analogix_dp_device *dp, u32 level) { u32 reg; @@ -973,7 +973,7 @@ void exynos_dp_set_lane3_pre_emphasis(struct exynos_dp_device *dp, u32 level) writel(reg, dp->reg_base + EXYNOS_DP_LN3_LINK_TRAINING_CTL); } -void exynos_dp_set_lane0_link_training(struct exynos_dp_device *dp, +void analogix_dp_set_lane0_link_training(struct analogix_dp_device *dp, u32 training_lane) { u32 reg; @@ -982,7 +982,7 @@ void exynos_dp_set_lane0_link_training(struct exynos_dp_device *dp, writel(reg, dp->reg_base + EXYNOS_DP_LN0_LINK_TRAINING_CTL); } -void exynos_dp_set_lane1_link_training(struct exynos_dp_device *dp, +void analogix_dp_set_lane1_link_training(struct analogix_dp_device *dp, u32 training_lane) { u32 reg; @@ -991,8 +991,8 @@ void exynos_dp_set_lane1_link_training(struct exynos_dp_device *dp, writel(reg, dp->reg_base + EXYNOS_DP_LN1_LINK_TRAINING_CTL); } -void exynos_dp_set_lane2_link_training(struct exynos_dp_device *dp, - u32 training_lane) +void analogix_dp_set_lane2_link_training(struct analogix_dp_device *dp, + u32 training_lane) { u32 reg; @@ -1000,7 +1000,7 @@ void exynos_dp_set_lane2_link_training(struct exynos_dp_device *dp, writel(reg, dp->reg_base + EXYNOS_DP_LN2_LINK_TRAINING_CTL); } -void exynos_dp_set_lane3_link_training(struct exynos_dp_device *dp, +void analogix_dp_set_lane3_link_training(struct analogix_dp_device *dp, u32 training_lane) { u32 reg; @@ -1009,7 +1009,7 @@ void exynos_dp_set_lane3_link_training(struct exynos_dp_device *dp, writel(reg, dp->reg_base + EXYNOS_DP_LN3_LINK_TRAINING_CTL); } -u32 exynos_dp_get_lane0_link_training(struct exynos_dp_device *dp) +u32 analogix_dp_get_lane0_link_training(struct analogix_dp_device *dp) { u32 reg; @@ -1017,7 +1017,7 @@ u32 exynos_dp_get_lane0_link_training(struct exynos_dp_device *dp) return reg; } -u32 exynos_dp_get_lane1_link_training(struct exynos_dp_device *dp) +u32 analogix_dp_get_lane1_link_training(struct analogix_dp_device *dp) { u32 reg; @@ -1025,7 +1025,7 @@ u32 exynos_dp_get_lane1_link_training(struct exynos_dp_device *dp) return reg; } -u32 exynos_dp_get_lane2_link_training(struct exynos_dp_device *dp) +u32 analogix_dp_get_lane2_link_training(struct analogix_dp_device *dp) { u32 reg; @@ -1033,7 +1033,7 @@ u32 exynos_dp_get_lane2_link_training(struct exynos_dp_device *dp) return reg; } -u32 exynos_dp_get_lane3_link_training(struct exynos_dp_device *dp) +u32 analogix_dp_get_lane3_link_training(struct analogix_dp_device *dp) { u32 reg; @@ -1041,7 +1041,7 @@ u32 exynos_dp_get_lane3_link_training(struct exynos_dp_device *dp) return reg; } -void exynos_dp_reset_macro(struct exynos_dp_device *dp) +void analogix_dp_reset_macro(struct analogix_dp_device *dp) { u32 reg; @@ -1056,7 +1056,7 @@ void exynos_dp_reset_macro(struct exynos_dp_device *dp) writel(reg, dp->reg_base + EXYNOS_DP_PHY_TEST); } -void exynos_dp_init_video(struct exynos_dp_device *dp) +void analogix_dp_init_video(struct analogix_dp_device *dp) { u32 reg; @@ -1076,7 +1076,7 @@ void exynos_dp_init_video(struct exynos_dp_device *dp) writel(reg, dp->reg_base + EXYNOS_DP_VIDEO_CTL_8); } -void exynos_dp_set_video_color_format(struct exynos_dp_device *dp) +void analogix_dp_set_video_color_format(struct analogix_dp_device *dp) { u32 reg; @@ -1096,7 +1096,7 @@ void exynos_dp_set_video_color_format(struct exynos_dp_device *dp) writel(reg, dp->reg_base + EXYNOS_DP_VIDEO_CTL_3); } -int exynos_dp_is_slave_video_stream_clock_on(struct exynos_dp_device *dp) +int analogix_dp_is_slave_video_stream_clock_on(struct analogix_dp_device *dp) { u32 reg; @@ -1124,7 +1124,7 @@ int exynos_dp_is_slave_video_stream_clock_on(struct exynos_dp_device *dp) return 0; } -void exynos_dp_set_video_cr_mn(struct exynos_dp_device *dp, +void analogix_dp_set_video_cr_mn(struct analogix_dp_device *dp, enum clock_recovery_m_value_type type, u32 m_value, u32 n_value) @@ -1159,7 +1159,7 @@ void exynos_dp_set_video_cr_mn(struct exynos_dp_device *dp, } } -void exynos_dp_set_video_timing_mode(struct exynos_dp_device *dp, u32 type) +void analogix_dp_set_video_timing_mode(struct analogix_dp_device *dp, u32 type) { u32 reg; @@ -1174,7 +1174,7 @@ void exynos_dp_set_video_timing_mode(struct exynos_dp_device *dp, u32 type) } } -void exynos_dp_enable_video_master(struct exynos_dp_device *dp, bool enable) +void analogix_dp_enable_video_master(struct analogix_dp_device *dp, bool enable) { u32 reg; @@ -1191,7 +1191,7 @@ void exynos_dp_enable_video_master(struct exynos_dp_device *dp, bool enable) } } -void exynos_dp_start_video(struct exynos_dp_device *dp) +void analogix_dp_start_video(struct analogix_dp_device *dp) { u32 reg; @@ -1200,7 +1200,7 @@ void exynos_dp_start_video(struct exynos_dp_device *dp) writel(reg, dp->reg_base + EXYNOS_DP_VIDEO_CTL_1); } -int exynos_dp_is_video_stream_on(struct exynos_dp_device *dp) +int analogix_dp_is_video_stream_on(struct analogix_dp_device *dp) { u32 reg; @@ -1216,7 +1216,7 @@ int exynos_dp_is_video_stream_on(struct exynos_dp_device *dp) return 0; } -void exynos_dp_config_video_slave_mode(struct exynos_dp_device *dp) +void analogix_dp_config_video_slave_mode(struct analogix_dp_device *dp) { u32 reg; @@ -1244,7 +1244,7 @@ void exynos_dp_config_video_slave_mode(struct exynos_dp_device *dp) writel(reg, dp->reg_base + EXYNOS_DP_SOC_GENERAL_CTL); } -void exynos_dp_enable_scrambling(struct exynos_dp_device *dp) +void analogix_dp_enable_scrambling(struct analogix_dp_device *dp) { u32 reg; @@ -1253,7 +1253,7 @@ void exynos_dp_enable_scrambling(struct exynos_dp_device *dp) writel(reg, dp->reg_base + EXYNOS_DP_TRAINING_PTN_SET); } -void exynos_dp_disable_scrambling(struct exynos_dp_device *dp) +void analogix_dp_disable_scrambling(struct analogix_dp_device *dp) { u32 reg; diff --git a/drivers/gpu/drm/exynos/exynos_dp_reg.h b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h similarity index 98% rename from drivers/gpu/drm/exynos/exynos_dp_reg.h rename to drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h index 2e9bd0e0b9f2..b9661c9e8dc6 100644 --- a/drivers/gpu/drm/exynos/exynos_dp_reg.h +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.h @@ -1,5 +1,5 @@ /* - * Register definition file for Samsung DP driver + * Register definition file for Analogix DP core driver * * Copyright (C) 2012 Samsung Electronics Co., Ltd. * Author: Jingoo Han <jg1.han@samsung.com> @@ -9,8 +9,8 @@ * published by the Free Software Foundation. */ -#ifndef _EXYNOS_DP_REG_H -#define _EXYNOS_DP_REG_H +#ifndef _ANALOGIX_DP_REG_H +#define _ANALOGIX_DP_REG_H #define EXYNOS_DP_TX_SW_RESET 0x14 #define EXYNOS_DP_FUNC_EN_1 0x18 @@ -363,4 +363,4 @@ #define VIDEO_MODE_SLAVE_MODE (0x1 << 0) #define VIDEO_MODE_MASTER_MODE (0x0 << 0) -#endif /* _EXYNOS_DP_REG_H */ +#endif /* _ANALOGIX_DP_REG_H */ diff --git a/drivers/gpu/drm/exynos/Kconfig b/drivers/gpu/drm/exynos/Kconfig index f17d39279596..2fadd8275fa5 100644 --- a/drivers/gpu/drm/exynos/Kconfig +++ b/drivers/gpu/drm/exynos/Kconfig @@ -71,8 +71,9 @@ config DRM_EXYNOS_DSI This enables support for Exynos MIPI-DSI device. config DRM_EXYNOS_DP - bool "Display Port" + bool "EXYNOS specific extensions for Analogix DP driver" depends on DRM_EXYNOS_FIMD || DRM_EXYNOS7_DECON + select DRM_ANALOGIX_DP default DRM_EXYNOS select DRM_PANEL help diff --git a/drivers/gpu/drm/exynos/Makefile b/drivers/gpu/drm/exynos/Makefile index 968b31c522b2..2bdd949eff24 100644 --- a/drivers/gpu/drm/exynos/Makefile +++ b/drivers/gpu/drm/exynos/Makefile @@ -12,7 +12,7 @@ exynosdrm-$(CONFIG_DRM_EXYNOS5433_DECON) += exynos5433_drm_decon.o exynosdrm-$(CONFIG_DRM_EXYNOS7_DECON) += exynos7_drm_decon.o exynosdrm-$(CONFIG_DRM_EXYNOS_DPI) += exynos_drm_dpi.o exynosdrm-$(CONFIG_DRM_EXYNOS_DSI) += exynos_drm_dsi.o -exynosdrm-$(CONFIG_DRM_EXYNOS_DP) += exynos_dp_core.o exynos_dp_reg.o +exynosdrm-$(CONFIG_DRM_EXYNOS_DP) += exynos_dp_core.o exynosdrm-$(CONFIG_DRM_EXYNOS_MIXER) += exynos_mixer.o exynosdrm-$(CONFIG_DRM_EXYNOS_HDMI) += exynos_hdmi.o exynosdrm-$(CONFIG_DRM_EXYNOS_VIDI) += exynos_drm_vidi.o diff --git a/drivers/gpu/drm/exynos/exynos_dp_core.c b/drivers/gpu/drm/exynos/exynos_dp_core.c index cff8dc788820..845679448206 100644 --- a/drivers/gpu/drm/exynos/exynos_dp_core.c +++ b/drivers/gpu/drm/exynos/exynos_dp_core.c @@ -14,967 +14,76 @@ #include <linux/platform_device.h> #include <linux/err.h> #include <linux/clk.h> -#include <linux/io.h> -#include <linux/interrupt.h> -#include <linux/of.h> -#include <linux/of_gpio.h> #include <linux/of_graph.h> -#include <linux/gpio.h> #include <linux/component.h> -#include <linux/phy/phy.h> #include <video/of_display_timing.h> #include <video/of_videomode.h> +#include <video/videomode.h> #include <drm/drmP.h> #include <drm/drm_crtc.h> #include <drm/drm_crtc_helper.h> -#include <drm/drm_atomic_helper.h> #include <drm/drm_panel.h> -#include "exynos_dp_core.h" +#include <drm/bridge/analogix_dp.h> +#include <drm/exynos_drm.h> + #include "exynos_drm_crtc.h" -#define ctx_from_connector(c) container_of(c, struct exynos_dp_device, \ - connector) +#define to_dp(nm) container_of(nm, struct exynos_dp_device, nm) -static inline struct exynos_drm_crtc *dp_to_crtc(struct exynos_dp_device *dp) -{ - return to_exynos_crtc(dp->encoder.crtc); -} +struct exynos_dp_device { + struct drm_encoder encoder; + struct drm_connector connector; + struct drm_bridge *ptn_bridge; + struct drm_device *drm_dev; + struct device *dev; -static inline struct exynos_dp_device *encoder_to_dp( - struct drm_encoder *e) -{ - return container_of(e, struct exynos_dp_device, encoder); -} - -struct bridge_init { - struct i2c_client *client; - struct device_node *node; + struct videomode vm; + struct analogix_dp_plat_data plat_data; }; -static void exynos_dp_init_dp(struct exynos_dp_device *dp) +int exynos_dp_crtc_clock_enable(struct analogix_dp_plat_data *plat_data, + bool enable) { - exynos_dp_reset(dp); + struct exynos_dp_device *dp = to_dp(plat_data); + struct drm_encoder *encoder = &dp->encoder; + struct exynos_drm_crtc *crtc; - exynos_dp_swreset(dp); + if (!encoder) + return -1; - exynos_dp_init_analog_param(dp); - exynos_dp_init_interrupt(dp); - - /* SW defined function Normal operation */ - exynos_dp_enable_sw_function(dp); - - exynos_dp_config_interrupt(dp); - exynos_dp_init_analog_func(dp); - - exynos_dp_init_hpd(dp); - exynos_dp_init_aux(dp); -} - -static int exynos_dp_detect_hpd(struct exynos_dp_device *dp) -{ - int timeout_loop = 0; - - while (exynos_dp_get_plug_in_status(dp) != 0) { - timeout_loop++; - if (DP_TIMEOUT_LOOP_COUNT < timeout_loop) { - dev_err(dp->dev, "failed to get hpd plug status\n"); - return -ETIMEDOUT; - } - usleep_range(10, 11); - } + crtc = to_exynos_crtc(encoder->crtc); + if (crtc && crtc->ops && crtc->ops->clock_enable) + crtc->ops->clock_enable(crtc, enable); return 0; } -static unsigned char exynos_dp_calc_edid_check_sum(unsigned char *edid_data) +static int exynos_dp_poweron(struct analogix_dp_plat_data *plat_data) { - int i; - unsigned char sum = 0; - - for (i = 0; i < EDID_BLOCK_LENGTH; i++) - sum = sum + edid_data[i]; - - return sum; + return exynos_dp_crtc_clock_enable(plat_data, true); } -static int exynos_dp_read_edid(struct exynos_dp_device *dp) +static int exynos_dp_poweroff(struct analogix_dp_plat_data *plat_data) { - unsigned char edid[EDID_BLOCK_LENGTH * 2]; - unsigned int extend_block = 0; - unsigned char sum; - 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 = exynos_dp_read_byte_from_i2c(dp, I2C_EDID_DEVICE_ADDR, - EDID_EXTENSION_FLAG, - &extend_block); - if (retval) - return retval; - - if (extend_block > 0) { - dev_dbg(dp->dev, "EDID data includes a single extension!\n"); - - /* Read EDID data */ - retval = exynos_dp_read_bytes_from_i2c(dp, I2C_EDID_DEVICE_ADDR, - EDID_HEADER_PATTERN, - EDID_BLOCK_LENGTH, - &edid[EDID_HEADER_PATTERN]); - if (retval != 0) { - dev_err(dp->dev, "EDID Read failed!\n"); - return -EIO; - } - sum = exynos_dp_calc_edid_check_sum(edid); - if (sum != 0) { - dev_err(dp->dev, "EDID bad checksum!\n"); - return -EIO; - } - - /* Read additional EDID data */ - retval = exynos_dp_read_bytes_from_i2c(dp, - I2C_EDID_DEVICE_ADDR, - EDID_BLOCK_LENGTH, - EDID_BLOCK_LENGTH, - &edid[EDID_BLOCK_LENGTH]); - if (retval != 0) { - dev_err(dp->dev, "EDID Read failed!\n"); - return -EIO; - } - sum = exynos_dp_calc_edid_check_sum(&edid[EDID_BLOCK_LENGTH]); - if (sum != 0) { - dev_err(dp->dev, "EDID bad checksum!\n"); - return -EIO; - } - - exynos_dp_read_byte_from_dpcd(dp, DP_TEST_REQUEST, - &test_vector); - if (test_vector & DP_TEST_LINK_EDID_READ) { - exynos_dp_write_byte_to_dpcd(dp, - DP_TEST_EDID_CHECKSUM, - edid[EDID_BLOCK_LENGTH + EDID_CHECKSUM]); - exynos_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 = exynos_dp_read_bytes_from_i2c(dp, - I2C_EDID_DEVICE_ADDR, - EDID_HEADER_PATTERN, - EDID_BLOCK_LENGTH, - &edid[EDID_HEADER_PATTERN]); - if (retval != 0) { - dev_err(dp->dev, "EDID Read failed!\n"); - return -EIO; - } - sum = exynos_dp_calc_edid_check_sum(edid); - if (sum != 0) { - dev_err(dp->dev, "EDID bad checksum!\n"); - return -EIO; - } - - exynos_dp_read_byte_from_dpcd(dp, - DP_TEST_REQUEST, - &test_vector); - if (test_vector & DP_TEST_LINK_EDID_READ) { - exynos_dp_write_byte_to_dpcd(dp, - DP_TEST_EDID_CHECKSUM, - edid[EDID_CHECKSUM]); - exynos_dp_write_byte_to_dpcd(dp, - DP_TEST_RESPONSE, - DP_TEST_EDID_CHECKSUM_WRITE); - } - } - - dev_dbg(dp->dev, "EDID Read success!\n"); - return 0; + return exynos_dp_crtc_clock_enable(plat_data, false); } -static int exynos_dp_handle_edid(struct exynos_dp_device *dp) +static int exynos_dp_get_modes(struct analogix_dp_plat_data *plat_data) { - u8 buf[12]; - int i; - int retval; - - /* Read DPCD DP_DPCD_REV~RECEIVE_PORT1_CAP_1 */ - retval = exynos_dp_read_bytes_from_dpcd(dp, DP_DPCD_REV, - 12, buf); - if (retval) - return retval; - - /* Read EDID */ - for (i = 0; i < 3; i++) { - retval = exynos_dp_read_edid(dp); - if (!retval) - break; - } - - return retval; -} - -static void exynos_dp_enable_rx_to_enhanced_mode(struct exynos_dp_device *dp, - bool enable) -{ - u8 data; - - exynos_dp_read_byte_from_dpcd(dp, DP_LANE_COUNT_SET, &data); - - if (enable) - exynos_dp_write_byte_to_dpcd(dp, DP_LANE_COUNT_SET, - DP_LANE_COUNT_ENHANCED_FRAME_EN | - DPCD_LANE_COUNT_SET(data)); - else - exynos_dp_write_byte_to_dpcd(dp, DP_LANE_COUNT_SET, - DPCD_LANE_COUNT_SET(data)); -} - -static int exynos_dp_is_enhanced_mode_available(struct exynos_dp_device *dp) -{ - u8 data; - int retval; - - exynos_dp_read_byte_from_dpcd(dp, DP_MAX_LANE_COUNT, &data); - retval = DPCD_ENHANCED_FRAME_CAP(data); - - return retval; -} - -static void exynos_dp_set_enhanced_mode(struct exynos_dp_device *dp) -{ - u8 data; - - data = exynos_dp_is_enhanced_mode_available(dp); - exynos_dp_enable_rx_to_enhanced_mode(dp, data); - exynos_dp_enable_enhanced_mode(dp, data); -} - -static void exynos_dp_training_pattern_dis(struct exynos_dp_device *dp) -{ - exynos_dp_set_training_pattern(dp, DP_NONE); - - exynos_dp_write_byte_to_dpcd(dp, - DP_TRAINING_PATTERN_SET, - DP_TRAINING_PATTERN_DISABLE); -} - -static void exynos_dp_set_lane_lane_pre_emphasis(struct exynos_dp_device *dp, - int pre_emphasis, int lane) -{ - switch (lane) { - case 0: - exynos_dp_set_lane0_pre_emphasis(dp, pre_emphasis); - break; - case 1: - exynos_dp_set_lane1_pre_emphasis(dp, pre_emphasis); - break; - - case 2: - exynos_dp_set_lane2_pre_emphasis(dp, pre_emphasis); - break; - - case 3: - exynos_dp_set_lane3_pre_emphasis(dp, pre_emphasis); - break; - } -} - -static int exynos_dp_link_start(struct exynos_dp_device *dp) -{ - u8 buf[4]; - int lane, lane_count, pll_tries, 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*/ - exynos_dp_set_link_bandwidth(dp, dp->link_train.link_rate); - exynos_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 = exynos_dp_write_bytes_to_dpcd(dp, DP_LINK_BW_SET, - 2, buf); - if (retval) - return retval; - - /* Set TX pre-emphasis to minimum */ - for (lane = 0; lane < lane_count; lane++) - exynos_dp_set_lane_lane_pre_emphasis(dp, - PRE_EMPHASIS_LEVEL_0, lane); - - /* Wait for PLL lock */ - pll_tries = 0; - while (exynos_dp_get_pll_lock_status(dp) == PLL_UNLOCKED) { - if (pll_tries == DP_TIMEOUT_LOOP_COUNT) { - dev_err(dp->dev, "Wait for PLL lock timed out\n"); - return -ETIMEDOUT; - } - - pll_tries++; - usleep_range(90, 120); - } - - /* Set training pattern 1 */ - exynos_dp_set_training_pattern(dp, TRAINING_PTN1); - - /* Set RX training pattern */ - retval = exynos_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 = exynos_dp_write_bytes_to_dpcd(dp, DP_TRAINING_LANE0_SET, - lane_count, buf); - - return retval; -} - -static unsigned char exynos_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 exynos_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 = exynos_dp_get_lane_status(link_status, lane); - if ((lane_status & DP_LANE_CR_DONE) == 0) - return -EINVAL; - } - return 0; -} - -static int exynos_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 = exynos_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 exynos_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 exynos_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 exynos_dp_set_lane_link_training(struct exynos_dp_device *dp, - u8 training_lane_set, int lane) -{ - switch (lane) { - case 0: - exynos_dp_set_lane0_link_training(dp, training_lane_set); - break; - case 1: - exynos_dp_set_lane1_link_training(dp, training_lane_set); - break; - - case 2: - exynos_dp_set_lane2_link_training(dp, training_lane_set); - break; - - case 3: - exynos_dp_set_lane3_link_training(dp, training_lane_set); - break; - } -} - -static unsigned int exynos_dp_get_lane_link_training( - struct exynos_dp_device *dp, - int lane) -{ - u32 reg; - - switch (lane) { - case 0: - reg = exynos_dp_get_lane0_link_training(dp); - break; - case 1: - reg = exynos_dp_get_lane1_link_training(dp); - break; - case 2: - reg = exynos_dp_get_lane2_link_training(dp); - break; - case 3: - reg = exynos_dp_get_lane3_link_training(dp); - break; - default: - WARN_ON(1); - return 0; - } - - return reg; -} - -static void exynos_dp_reduce_link_rate(struct exynos_dp_device *dp) -{ - exynos_dp_training_pattern_dis(dp); - exynos_dp_set_enhanced_mode(dp); - - dp->link_train.lt_state = FAILED; -} - -static void exynos_dp_get_adjust_training_lane(struct exynos_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 = exynos_dp_get_adjust_request_voltage( - adjust_request, lane); - pre_emphasis = exynos_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 int exynos_dp_process_clock_recovery(struct exynos_dp_device *dp) -{ - int lane, lane_count, retval; - u8 voltage_swing, pre_emphasis, training_lane; - u8 link_status[2], adjust_request[2]; - - usleep_range(100, 101); - - lane_count = dp->link_train.lane_count; - - retval = exynos_dp_read_bytes_from_dpcd(dp, - DP_LANE0_1_STATUS, 2, link_status); - if (retval) - return retval; - - retval = exynos_dp_read_bytes_from_dpcd(dp, - DP_ADJUST_REQUEST_LANE0_1, 2, adjust_request); - if (retval) - return retval; - - if (exynos_dp_clock_recovery_ok(link_status, lane_count) == 0) { - /* set training pattern 2 for EQ */ - exynos_dp_set_training_pattern(dp, TRAINING_PTN2); - - retval = exynos_dp_write_byte_to_dpcd(dp, - DP_TRAINING_PATTERN_SET, - DP_LINK_SCRAMBLING_DISABLE | - 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; - } else { - for (lane = 0; lane < lane_count; lane++) { - training_lane = exynos_dp_get_lane_link_training( - dp, lane); - voltage_swing = exynos_dp_get_adjust_request_voltage( - adjust_request, lane); - pre_emphasis = exynos_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); - exynos_dp_reduce_link_rate(dp); - return -EIO; - } - } - } - - exynos_dp_get_adjust_training_lane(dp, adjust_request); - - for (lane = 0; lane < lane_count; lane++) - exynos_dp_set_lane_link_training(dp, - dp->link_train.training_lane[lane], lane); - - retval = exynos_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 exynos_dp_process_equalizer_training(struct exynos_dp_device *dp) -{ - int lane, lane_count, retval; - u32 reg; - u8 link_align, link_status[2], adjust_request[2]; - - usleep_range(400, 401); - - lane_count = dp->link_train.lane_count; - - retval = exynos_dp_read_bytes_from_dpcd(dp, - DP_LANE0_1_STATUS, 2, link_status); - if (retval) - return retval; - - if (exynos_dp_clock_recovery_ok(link_status, lane_count)) { - exynos_dp_reduce_link_rate(dp); - return -EIO; - } - - retval = exynos_dp_read_bytes_from_dpcd(dp, - DP_ADJUST_REQUEST_LANE0_1, 2, adjust_request); - if (retval) - return retval; - - retval = exynos_dp_read_byte_from_dpcd(dp, - DP_LANE_ALIGN_STATUS_UPDATED, &link_align); - if (retval) - return retval; - - exynos_dp_get_adjust_training_lane(dp, adjust_request); - - if (!exynos_dp_channel_eq_ok(link_status, link_align, lane_count)) { - /* traing pattern Set to Normal */ - exynos_dp_training_pattern_dis(dp); - - dev_info(dp->dev, "Link Training success!\n"); - - exynos_dp_get_link_bandwidth(dp, ®); - dp->link_train.link_rate = reg; - dev_dbg(dp->dev, "final bandwidth = %.2x\n", - dp->link_train.link_rate); - - exynos_dp_get_lane_count(dp, ®); - dp->link_train.lane_count = reg; - dev_dbg(dp->dev, "final lane count = %.2x\n", - dp->link_train.lane_count); - - /* set enhanced mode if available */ - exynos_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_err(dp->dev, "EQ Max loop\n"); - exynos_dp_reduce_link_rate(dp); - return -EIO; - } - - for (lane = 0; lane < lane_count; lane++) - exynos_dp_set_lane_link_training(dp, - dp->link_train.training_lane[lane], lane); - - retval = exynos_dp_write_bytes_to_dpcd(dp, DP_TRAINING_LANE0_SET, - lane_count, dp->link_train.training_lane); - - return retval; -} - -static void exynos_dp_get_max_rx_bandwidth(struct exynos_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 - */ - exynos_dp_read_byte_from_dpcd(dp, DP_MAX_LINK_RATE, &data); - *bandwidth = data; -} - -static void exynos_dp_get_max_rx_lane_count(struct exynos_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 - */ - exynos_dp_read_byte_from_dpcd(dp, DP_MAX_LANE_COUNT, &data); - *lane_count = DPCD_MAX_LANE_COUNT(data); -} - -static void exynos_dp_init_training(struct exynos_dp_device *dp, - enum link_lane_count_type max_lane, - enum link_rate_type max_rate) -{ - /* - * MACRO_RST must be applied after the PLL_LOCK to avoid - * the DP inter pair skew issue for at least 10 us - */ - exynos_dp_reset_macro(dp); - - /* Initialize by reading RX's DPCD */ - exynos_dp_get_max_rx_bandwidth(dp, &dp->link_train.link_rate); - exynos_dp_get_max_rx_lane_count(dp, &dp->link_train.lane_count); - - if ((dp->link_train.link_rate != LINK_RATE_1_62GBPS) && - (dp->link_train.link_rate != LINK_RATE_2_70GBPS)) { - dev_err(dp->dev, "Rx Max Link Rate is abnormal :%x !\n", - dp->link_train.link_rate); - dp->link_train.link_rate = LINK_RATE_1_62GBPS; - } - - if (dp->link_train.lane_count == 0) { - dev_err(dp->dev, "Rx Max Lane count is abnormal :%x !\n", - dp->link_train.lane_count); - dp->link_train.lane_count = (u8)LANE_COUNT1; - } - - /* Setup TX lane count & rate */ - if (dp->link_train.lane_count > max_lane) - dp->link_train.lane_count = max_lane; - if (dp->link_train.link_rate > max_rate) - dp->link_train.link_rate = max_rate; - - /* All DP analog module power up */ - exynos_dp_set_analog_power_down(dp, POWER_ALL, 0); -} - -static int exynos_dp_sw_link_training(struct exynos_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 = exynos_dp_link_start(dp); - if (retval) - dev_err(dp->dev, "LT link start failed!\n"); - break; - case CLOCK_RECOVERY: - retval = exynos_dp_process_clock_recovery(dp); - if (retval) - dev_err(dp->dev, "LT CR failed!\n"); - break; - case EQUALIZER_TRAINING: - retval = exynos_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; - } - } - if (retval) - dev_err(dp->dev, "eDP link training failed (%d)\n", retval); - - return retval; -} - -static int exynos_dp_set_link_train(struct exynos_dp_device *dp, - u32 count, - u32 bwtype) -{ - int i; - int retval; - - for (i = 0; i < DP_TIMEOUT_LOOP_COUNT; i++) { - exynos_dp_init_training(dp, count, bwtype); - retval = exynos_dp_sw_link_training(dp); - if (retval == 0) - break; - - usleep_range(100, 110); - } - - return retval; -} - -static int exynos_dp_config_video(struct exynos_dp_device *dp) -{ - int retval = 0; - int timeout_loop = 0; - int done_count = 0; - - exynos_dp_config_video_slave_mode(dp); - - exynos_dp_set_video_color_format(dp); - - if (exynos_dp_get_pll_lock_status(dp) == PLL_UNLOCKED) { - dev_err(dp->dev, "PLL is not locked yet.\n"); - return -EINVAL; - } - - for (;;) { - timeout_loop++; - if (exynos_dp_is_slave_video_stream_clock_on(dp) == 0) - break; - if (DP_TIMEOUT_LOOP_COUNT < timeout_loop) { - dev_err(dp->dev, "Timeout of video streamclk ok\n"); - return -ETIMEDOUT; - } - - usleep_range(1, 2); - } - - /* Set to use the register calculated M/N video */ - exynos_dp_set_video_cr_mn(dp, CALCULATED_M, 0, 0); - - /* For video bist, Video timing must be generated by register */ - exynos_dp_set_video_timing_mode(dp, VIDEO_TIMING_FROM_CAPTURE); - - /* Disable video mute */ - exynos_dp_enable_video_mute(dp, 0); - - /* Configure video slave mode */ - exynos_dp_enable_video_master(dp, 0); - - timeout_loop = 0; - - for (;;) { - timeout_loop++; - if (exynos_dp_is_video_stream_on(dp) == 0) { - done_count++; - if (done_count > 10) - break; - } else if (done_count) { - done_count = 0; - } - if (DP_TIMEOUT_LOOP_COUNT < timeout_loop) { - dev_err(dp->dev, "Timeout of video streamclk ok\n"); - return -ETIMEDOUT; - } - - usleep_range(1000, 1001); - } - - if (retval != 0) - dev_err(dp->dev, "Video stream is not detected!\n"); - - return retval; -} - -static void exynos_dp_enable_scramble(struct exynos_dp_device *dp, bool enable) -{ - u8 data; - - if (enable) { - exynos_dp_enable_scrambling(dp); - - exynos_dp_read_byte_from_dpcd(dp, - DP_TRAINING_PATTERN_SET, - &data); - exynos_dp_write_byte_to_dpcd(dp, - DP_TRAINING_PATTERN_SET, - (u8)(data & ~DP_LINK_SCRAMBLING_DISABLE)); - } else { - exynos_dp_disable_scrambling(dp); - - exynos_dp_read_byte_from_dpcd(dp, - DP_TRAINING_PATTERN_SET, - &data); - exynos_dp_write_byte_to_dpcd(dp, - DP_TRAINING_PATTERN_SET, - (u8)(data | DP_LINK_SCRAMBLING_DISABLE)); - } -} - -static irqreturn_t exynos_dp_irq_handler(int irq, void *arg) -{ - struct exynos_dp_device *dp = arg; - - enum dp_irq_type irq_type; - - irq_type = exynos_dp_get_irq_type(dp); - switch (irq_type) { - case DP_IRQ_TYPE_HP_CABLE_IN: - dev_dbg(dp->dev, "Received irq - cable in\n"); - schedule_work(&dp->hotplug_work); - exynos_dp_clear_hotplug_interrupts(dp); - break; - case DP_IRQ_TYPE_HP_CABLE_OUT: - dev_dbg(dp->dev, "Received irq - cable out\n"); - exynos_dp_clear_hotplug_interrupts(dp); - break; - case DP_IRQ_TYPE_HP_CHANGE: - /* - * We get these change notifications once in a while, but there - * is nothing we can do with them. Just ignore it for now and - * only handle cable changes. - */ - dev_dbg(dp->dev, "Received irq - hotplug change; ignoring.\n"); - exynos_dp_clear_hotplug_interrupts(dp); - break; - default: - dev_err(dp->dev, "Received irq - unknown type!\n"); - break; - } - return IRQ_HANDLED; -} - -static void exynos_dp_hotplug(struct work_struct *work) -{ - struct exynos_dp_device *dp; - - dp = container_of(work, struct exynos_dp_device, hotplug_work); - - if (dp->drm_dev) - drm_helper_hpd_irq_event(dp->drm_dev); -} - -static void exynos_dp_commit(struct drm_encoder *encoder) -{ - struct exynos_dp_device *dp = encoder_to_dp(encoder); - int ret; - - /* Keep the panel disabled while we configure video */ - if (dp->panel) { - if (drm_panel_disable(dp->panel)) - DRM_ERROR("failed to disable the panel\n"); - } - - ret = exynos_dp_detect_hpd(dp); - if (ret) { - /* Cable has been disconnected, we're done */ - return; - } - - ret = exynos_dp_handle_edid(dp); - if (ret) { - dev_err(dp->dev, "unable to handle edid\n"); - return; - } - - ret = exynos_dp_set_link_train(dp, dp->video_info->lane_count, - dp->video_info->link_rate); - if (ret) { - dev_err(dp->dev, "unable to do link train\n"); - return; - } - - exynos_dp_enable_scramble(dp, 1); - exynos_dp_enable_rx_to_enhanced_mode(dp, 1); - exynos_dp_enable_enhanced_mode(dp, 1); - - exynos_dp_set_lane_count(dp, dp->video_info->lane_count); - exynos_dp_set_link_bandwidth(dp, dp->video_info->link_rate); - - exynos_dp_init_video(dp); - ret = exynos_dp_config_video(dp); - if (ret) - dev_err(dp->dev, "unable to config video\n"); - - /* Safe to enable the panel now */ - if (dp->panel) { - if (drm_panel_enable(dp->panel)) - DRM_ERROR("failed to enable the panel\n"); - } - - /* Enable video */ - exynos_dp_start_video(dp); -} - -static enum drm_connector_status exynos_dp_detect( - struct drm_connector *connector, bool force) -{ - return connector_status_connected; -} - -static void exynos_dp_connector_destroy(struct drm_connector *connector) -{ - drm_connector_unregister(connector); - drm_connector_cleanup(connector); -} - -static const struct drm_connector_funcs exynos_dp_connector_funcs = { - .dpms = drm_atomic_helper_connector_dpms, - .fill_modes = drm_helper_probe_single_connector_modes, - .detect = exynos_dp_detect, - .destroy = exynos_dp_connector_destroy, - .reset = drm_atomic_helper_connector_reset, - .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, - .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, -}; - -static int exynos_dp_get_modes(struct drm_connector *connector) -{ - struct exynos_dp_device *dp = ctx_from_connector(connector); + struct exynos_dp_device *dp = to_dp(plat_data); + struct drm_connector *connector = &dp->connector; struct drm_display_mode *mode; + int num_modes = 0; - if (dp->panel) - return drm_panel_get_modes(dp->panel); + if (dp->plat_data.panel) + return num_modes; mode = drm_mode_create(connector->dev); if (!mode) { DRM_ERROR("failed to create a new display mode.\n"); - return 0; + return num_modes; } drm_display_mode_from_videomode(&dp->vm, mode); @@ -985,171 +94,31 @@ static int exynos_dp_get_modes(struct drm_connector *connector) drm_mode_set_name(mode); drm_mode_probed_add(connector, mode); - return 1; + return num_modes + 1; } -static struct drm_encoder *exynos_dp_best_encoder( - struct drm_connector *connector) +static int exynos_dp_bridge_attach(struct analogix_dp_plat_data *plat_data, + struct drm_bridge *bridge, + struct drm_connector *connector) { - struct exynos_dp_device *dp = ctx_from_connector(connector); - - return &dp->encoder; -} - -static const struct drm_connector_helper_funcs exynos_dp_connector_helper_funcs = { - .get_modes = exynos_dp_get_modes, - .best_encoder = exynos_dp_best_encoder, -}; - -/* returns the number of bridges attached */ -static int exynos_drm_attach_lcd_bridge(struct exynos_dp_device *dp, - struct drm_encoder *encoder) -{ - int ret; - - encoder->bridge->next = dp->ptn_bridge; - dp->ptn_bridge->encoder = encoder; - ret = drm_bridge_attach(encoder->dev, dp->ptn_bridge); - if (ret) { - DRM_ERROR("Failed to attach bridge to drm\n"); - return ret; - } - - return 0; -} - -static int exynos_dp_bridge_attach(struct drm_bridge *bridge) -{ - struct exynos_dp_device *dp = bridge->driver_private; + struct exynos_dp_device *dp = to_dp(plat_data); struct drm_encoder *encoder = &dp->encoder; - struct drm_connector *connector = &dp->connector; int ret; + drm_connector_register(connector); + /* Pre-empt DP connector creation if there's a bridge */ if (dp->ptn_bridge) { - ret = exynos_drm_attach_lcd_bridge(dp, encoder); - if (!ret) - return 0; - } - - connector->polled = DRM_CONNECTOR_POLL_HPD; - - ret = drm_connector_init(dp->drm_dev, connector, - &exynos_dp_connector_funcs, DRM_MODE_CONNECTOR_eDP); - if (ret) { - DRM_ERROR("Failed to initialize connector with drm\n"); - return ret; - } - - drm_connector_helper_add(connector, &exynos_dp_connector_helper_funcs); - drm_connector_register(connector); - drm_mode_connector_attach_encoder(connector, encoder); - - if (dp->panel) - ret = drm_panel_attach(dp->panel, &dp->connector); - - return ret; -} - -static void exynos_dp_bridge_enable(struct drm_bridge *bridge) -{ - struct exynos_dp_device *dp = bridge->driver_private; - struct exynos_drm_crtc *crtc = dp_to_crtc(dp); - - if (dp->dpms_mode == DRM_MODE_DPMS_ON) - return; - - pm_runtime_get_sync(dp->dev); - - if (dp->panel) { - if (drm_panel_prepare(dp->panel)) { - DRM_ERROR("failed to setup the panel\n"); - return; + bridge->next = dp->ptn_bridge; + dp->ptn_bridge->encoder = encoder; + ret = drm_bridge_attach(encoder->dev, dp->ptn_bridge); + if (ret) { + DRM_ERROR("Failed to attach bridge to drm\n"); + bridge->next = NULL; + return ret; } } - if (crtc->ops->clock_enable) - crtc->ops->clock_enable(dp_to_crtc(dp), true); - - phy_power_on(dp->phy); - exynos_dp_init_dp(dp); - enable_irq(dp->irq); - exynos_dp_commit(&dp->encoder); - - dp->dpms_mode = DRM_MODE_DPMS_ON; -} - -static void exynos_dp_bridge_disable(struct drm_bridge *bridge) -{ - struct exynos_dp_device *dp = bridge->driver_private; - struct exynos_drm_crtc *crtc = dp_to_crtc(dp); - - if (dp->dpms_mode != DRM_MODE_DPMS_ON) - return; - - if (dp->panel) { - if (drm_panel_disable(dp->panel)) { - DRM_ERROR("failed to disable the panel\n"); - return; - } - } - - disable_irq(dp->irq); - flush_work(&dp->hotplug_work); - phy_power_off(dp->phy); - - if (crtc->ops->clock_enable) - crtc->ops->clock_enable(dp_to_crtc(dp), false); - - if (dp->panel) { - if (drm_panel_unprepare(dp->panel)) - DRM_ERROR("failed to turnoff the panel\n"); - } - - pm_runtime_put_sync(dp->dev); - - dp->dpms_mode = DRM_MODE_DPMS_OFF; -} - -static void exynos_dp_bridge_nop(struct drm_bridge *bridge) -{ - /* do nothing */ -} - -static const struct drm_bridge_funcs exynos_dp_bridge_funcs = { - .enable = exynos_dp_bridge_enable, - .disable = exynos_dp_bridge_disable, - .pre_enable = exynos_dp_bridge_nop, - .post_disable = exynos_dp_bridge_nop, - .attach = exynos_dp_bridge_attach, -}; - -static int exynos_dp_create_connector(struct drm_encoder *encoder) -{ - struct exynos_dp_device *dp = encoder_to_dp(encoder); - struct drm_device *drm_dev = dp->drm_dev; - struct drm_bridge *bridge; - int ret; - - bridge = devm_kzalloc(drm_dev->dev, sizeof(*bridge), GFP_KERNEL); - if (!bridge) { - DRM_ERROR("failed to allocate for drm bridge\n"); - return -ENOMEM; - } - - dp->bridge = bridge; - - encoder->bridge = bridge; - bridge->driver_private = dp; - bridge->encoder = encoder; - bridge->funcs = &exynos_dp_bridge_funcs; - - ret = drm_bridge_attach(drm_dev, bridge); - if (ret) { - DRM_ERROR("failed to attach drm bridge\n"); - return -EINVAL; - } - return 0; } @@ -1159,82 +128,21 @@ static void exynos_dp_mode_set(struct drm_encoder *encoder, { } -static void exynos_dp_enable(struct drm_encoder *encoder) -{ -} - -static void exynos_dp_disable(struct drm_encoder *encoder) +static void exynos_dp_nop(struct drm_encoder *encoder) { + /* do nothing */ } static const struct drm_encoder_helper_funcs exynos_dp_encoder_helper_funcs = { .mode_set = exynos_dp_mode_set, - .enable = exynos_dp_enable, - .disable = exynos_dp_disable, + .enable = exynos_dp_nop, + .disable = exynos_dp_nop, }; static const struct drm_encoder_funcs exynos_dp_encoder_funcs = { .destroy = drm_encoder_cleanup, }; -static struct video_info *exynos_dp_dt_parse_pdata(struct device *dev) -{ - struct device_node *dp_node = dev->of_node; - struct video_info *dp_video_config; - - dp_video_config = devm_kzalloc(dev, - sizeof(*dp_video_config), GFP_KERNEL); - if (!dp_video_config) - return ERR_PTR(-ENOMEM); - - dp_video_config->h_sync_polarity = - of_property_read_bool(dp_node, "hsync-active-high"); - - dp_video_config->v_sync_polarity = - of_property_read_bool(dp_node, "vsync-active-high"); - - dp_video_config->interlaced = - of_property_read_bool(dp_node, "interlaced"); - - if (of_property_read_u32(dp_node, "samsung,color-space", - &dp_video_config->color_space)) { - dev_err(dev, "failed to get color-space\n"); - return ERR_PTR(-EINVAL); - } - - if (of_property_read_u32(dp_node, "samsung,dynamic-range", - &dp_video_config->dynamic_range)) { - dev_err(dev, "failed to get dynamic-range\n"); - return ERR_PTR(-EINVAL); - } - - if (of_property_read_u32(dp_node, "samsung,ycbcr-coeff", - &dp_video_config->ycbcr_coeff)) { - dev_err(dev, "failed to get ycbcr-coeff\n"); - return ERR_PTR(-EINVAL); - } - - if (of_property_read_u32(dp_node, "samsung,color-depth", - &dp_video_config->color_depth)) { - dev_err(dev, "failed to get color-depth\n"); - return ERR_PTR(-EINVAL); - } - - if (of_property_read_u32(dp_node, "samsung,link-rate", - &dp_video_config->link_rate)) { - dev_err(dev, "failed to get link-rate\n"); - return ERR_PTR(-EINVAL); - } - - if (of_property_read_u32(dp_node, "samsung,lane-count", - &dp_video_config->lane_count)) { - dev_err(dev, "failed to get lane-count\n"); - return ERR_PTR(-EINVAL); - } - - return dp_video_config; -} - static int exynos_dp_dt_parse_panel(struct exynos_dp_device *dp) { int ret; @@ -1250,97 +158,32 @@ static int exynos_dp_dt_parse_panel(struct exynos_dp_device *dp) static int exynos_dp_bind(struct device *dev, struct device *master, void *data) { struct exynos_dp_device *dp = dev_get_drvdata(dev); - struct platform_device *pdev = to_platform_device(dev); - struct drm_device *drm_dev = data; struct drm_encoder *encoder = &dp->encoder; - struct resource *res; - unsigned int irq_flags; - int pipe, ret = 0; + struct drm_device *drm_dev = data; + int pipe, ret; - dp->dev = &pdev->dev; - dp->dpms_mode = DRM_MODE_DPMS_OFF; + /* + * Just like the probe function said, we don't need the + * device drvrate anymore, we should leave the charge to + * analogix dp driver, set the device drvdata to NULL. + */ + dev_set_drvdata(dev, NULL); - dp->video_info = exynos_dp_dt_parse_pdata(&pdev->dev); - if (IS_ERR(dp->video_info)) - return PTR_ERR(dp->video_info); + dp->dev = dev; + dp->drm_dev = drm_dev; - dp->phy = devm_phy_get(dp->dev, "dp"); - if (IS_ERR(dp->phy)) { - dev_err(dp->dev, "no DP phy configured\n"); - ret = PTR_ERR(dp->phy); - if (ret) { - /* - * phy itself is not enabled, so we can move forward - * assigning NULL to phy pointer. - */ - if (ret == -ENOSYS || ret == -ENODEV) - dp->phy = NULL; - else - return ret; - } - } + dp->plat_data.dev_type = EXYNOS_DP; + dp->plat_data.power_on = exynos_dp_poweron; + dp->plat_data.power_off = exynos_dp_poweroff; + dp->plat_data.attach = exynos_dp_bridge_attach; + dp->plat_data.get_modes = exynos_dp_get_modes; - if (!dp->panel && !dp->ptn_bridge) { + if (!dp->plat_data.panel && !dp->ptn_bridge) { ret = exynos_dp_dt_parse_panel(dp); if (ret) return ret; } - dp->clock = devm_clk_get(&pdev->dev, "dp"); - if (IS_ERR(dp->clock)) { - dev_err(&pdev->dev, "failed to get clock\n"); - return PTR_ERR(dp->clock); - } - - clk_prepare_enable(dp->clock); - - res = platform_get_resource(pdev, IORESOURCE_MEM, 0); - - dp->reg_base = devm_ioremap_resource(&pdev->dev, res); - if (IS_ERR(dp->reg_base)) - return PTR_ERR(dp->reg_base); - - dp->hpd_gpio = of_get_named_gpio(dev->of_node, "samsung,hpd-gpio", 0); - - if (gpio_is_valid(dp->hpd_gpio)) { - /* - * Set up the hotplug GPIO from the device tree as an interrupt. - * Simply specifying a different interrupt in the device tree - * doesn't work since we handle hotplug rather differently when - * using a GPIO. We also need the actual GPIO specifier so - * that we can get the current state of the GPIO. - */ - ret = devm_gpio_request_one(&pdev->dev, dp->hpd_gpio, GPIOF_IN, - "hpd_gpio"); - if (ret) { - dev_err(&pdev->dev, "failed to get hpd gpio\n"); - return ret; - } - dp->irq = gpio_to_irq(dp->hpd_gpio); - irq_flags = IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING; - } else { - dp->hpd_gpio = -ENODEV; - dp->irq = platform_get_irq(pdev, 0); - irq_flags = 0; - } - - if (dp->irq == -ENXIO) { - dev_err(&pdev->dev, "failed to get irq\n"); - return -ENODEV; - } - - INIT_WORK(&dp->hotplug_work, exynos_dp_hotplug); - - ret = devm_request_irq(&pdev->dev, dp->irq, exynos_dp_irq_handler, - irq_flags, "exynos-dp", dp); - if (ret) { - dev_err(&pdev->dev, "failed to request irq\n"); - return ret; - } - disable_irq(dp->irq); - - dp->drm_dev = drm_dev; - pipe = exynos_drm_crtc_get_pipe_from_type(drm_dev, EXYNOS_DISPLAY_TYPE_LCD); if (pipe < 0) @@ -1355,22 +198,15 @@ static int exynos_dp_bind(struct device *dev, struct device *master, void *data) drm_encoder_helper_add(encoder, &exynos_dp_encoder_helper_funcs); - ret = exynos_dp_create_connector(encoder); - if (ret) { - DRM_ERROR("failed to create connector ret = %d\n", ret); - drm_encoder_cleanup(encoder); - return ret; - } + dp->plat_data.encoder = encoder; - return 0; + return analogix_dp_bind(dev, dp->drm_dev, &dp->plat_data); } static void exynos_dp_unbind(struct device *dev, struct device *master, void *data) { - struct exynos_dp_device *dp = dev_get_drvdata(dev); - - exynos_dp_disable(&dp->encoder); + return analogix_dp_unbind(dev, master, data); } static const struct component_ops exynos_dp_ops = { @@ -1383,21 +219,25 @@ static int exynos_dp_probe(struct platform_device *pdev) struct device *dev = &pdev->dev; struct device_node *np = NULL, *endpoint = NULL; struct exynos_dp_device *dp; - int ret; dp = devm_kzalloc(&pdev->dev, sizeof(struct exynos_dp_device), GFP_KERNEL); if (!dp) return -ENOMEM; + /* + * We just use the drvdata until driver run into component + * add function, and then we would set drvdata to null, so + * that analogix dp driver would take charge of the drvdata. + */ platform_set_drvdata(pdev, dp); /* This is for the backward compatibility. */ np = of_parse_phandle(dev->of_node, "panel", 0); if (np) { - dp->panel = of_drm_find_panel(np); + dp->plat_data.panel = of_drm_find_panel(np); of_node_put(np); - if (!dp->panel) + if (!dp->plat_data.panel) return -EPROBE_DEFER; goto out; } @@ -1407,8 +247,8 @@ static int exynos_dp_probe(struct platform_device *pdev) np = of_graph_get_remote_port_parent(endpoint); if (np) { /* The remote port can be either a panel or a bridge */ - dp->panel = of_drm_find_panel(np); - if (!dp->panel) { + dp->plat_data.panel = of_drm_find_panel(np); + if (!dp->plat_data.panel) { dp->ptn_bridge = of_drm_find_bridge(np); if (!dp->ptn_bridge) { of_node_put(np); @@ -1426,23 +266,11 @@ static int exynos_dp_probe(struct platform_device *pdev) } out: - pm_runtime_enable(dev); - - ret = component_add(&pdev->dev, &exynos_dp_ops); - if (ret) - goto err_disable_pm_runtime; - - return ret; - -err_disable_pm_runtime: - pm_runtime_disable(dev); - - return ret; + return component_add(&pdev->dev, &exynos_dp_ops); } static int exynos_dp_remove(struct platform_device *pdev) { - pm_runtime_disable(&pdev->dev); component_del(&pdev->dev, &exynos_dp_ops); return 0; @@ -1451,25 +279,12 @@ static int exynos_dp_remove(struct platform_device *pdev) #ifdef CONFIG_PM static int exynos_dp_suspend(struct device *dev) { - struct exynos_dp_device *dp = dev_get_drvdata(dev); - - clk_disable_unprepare(dp->clock); - - return 0; + return analogix_dp_suspend(dev); } static int exynos_dp_resume(struct device *dev) { - struct exynos_dp_device *dp = dev_get_drvdata(dev); - int ret; - - ret = clk_prepare_enable(dp->clock); - if (ret < 0) { - DRM_ERROR("Failed to prepare_enable the clock clk [%d]\n", ret); - return ret; - } - - return 0; + return analogix_dp_resume(dev); } #endif @@ -1495,5 +310,5 @@ struct platform_driver dp_driver = { }; MODULE_AUTHOR("Jingoo Han <jg1.han@samsung.com>"); -MODULE_DESCRIPTION("Samsung SoC DP Driver"); +MODULE_DESCRIPTION("Samsung Specific Analogix-DP Driver Extension"); MODULE_LICENSE("GPL v2"); diff --git a/drivers/gpu/drm/exynos/exynos_dp_core.h b/drivers/gpu/drm/exynos/exynos_dp_core.h deleted file mode 100644 index b5c2d8f47f9c..000000000000 --- a/drivers/gpu/drm/exynos/exynos_dp_core.h +++ /dev/null @@ -1,282 +0,0 @@ -/* - * Header file for Samsung DP (Display Port) interface driver. - * - * Copyright (C) 2012 Samsung Electronics Co., Ltd. - * Author: Jingoo Han <jg1.han@samsung.com> - * - * This program is free software; you can redistribute it and/or modify it - * under the terms of the GNU General Public License as published by the - * Free Software Foundation; either version 2 of the License, or (at your - * option) any later version. - */ - -#ifndef _EXYNOS_DP_CORE_H -#define _EXYNOS_DP_CORE_H - -#include <drm/drm_crtc.h> -#include <drm/drm_dp_helper.h> -#include <drm/exynos_drm.h> -#include <video/videomode.h> - -#include "exynos_drm_drv.h" - -#define DP_TIMEOUT_LOOP_COUNT 100 -#define MAX_CR_LOOP 5 -#define MAX_EQ_LOOP 5 - -enum link_rate_type { - LINK_RATE_1_62GBPS = 0x06, - LINK_RATE_2_70GBPS = 0x0a -}; - -enum link_lane_count_type { - LANE_COUNT1 = 1, - LANE_COUNT2 = 2, - LANE_COUNT4 = 4 -}; - -enum link_training_state { - START, - CLOCK_RECOVERY, - EQUALIZER_TRAINING, - FINISHED, - FAILED -}; - -enum voltage_swing_level { - VOLTAGE_LEVEL_0, - VOLTAGE_LEVEL_1, - VOLTAGE_LEVEL_2, - VOLTAGE_LEVEL_3, -}; - -enum pre_emphasis_level { - PRE_EMPHASIS_LEVEL_0, - PRE_EMPHASIS_LEVEL_1, - PRE_EMPHASIS_LEVEL_2, - PRE_EMPHASIS_LEVEL_3, -}; - -enum pattern_set { - PRBS7, - D10_2, - TRAINING_PTN1, - TRAINING_PTN2, - DP_NONE -}; - -enum color_space { - COLOR_RGB, - COLOR_YCBCR422, - COLOR_YCBCR444 -}; - -enum color_depth { - COLOR_6, - COLOR_8, - COLOR_10, - COLOR_12 -}; - -enum color_coefficient { - COLOR_YCBCR601, - COLOR_YCBCR709 -}; - -enum dynamic_range { - VESA, - CEA -}; - -enum pll_status { - PLL_UNLOCKED, - PLL_LOCKED -}; - -enum clock_recovery_m_value_type { - CALCULATED_M, - REGISTER_M -}; - -enum video_timing_recognition_type { - VIDEO_TIMING_FROM_CAPTURE, - VIDEO_TIMING_FROM_REGISTER -}; - -enum analog_power_block { - AUX_BLOCK, - CH0_BLOCK, - CH1_BLOCK, - CH2_BLOCK, - CH3_BLOCK, - ANALOG_TOTAL, - POWER_ALL -}; - -enum dp_irq_type { - DP_IRQ_TYPE_HP_CABLE_IN, - DP_IRQ_TYPE_HP_CABLE_OUT, - DP_IRQ_TYPE_HP_CHANGE, - DP_IRQ_TYPE_UNKNOWN, -}; - -struct video_info { - char *name; - - bool h_sync_polarity; - bool v_sync_polarity; - bool interlaced; - - enum color_space color_space; - enum dynamic_range dynamic_range; - enum color_coefficient ycbcr_coeff; - enum color_depth color_depth; - - enum link_rate_type link_rate; - enum link_lane_count_type lane_count; -}; - -struct link_train { - int eq_loop; - int cr_loop[4]; - - u8 link_rate; - u8 lane_count; - u8 training_lane[4]; - - enum link_training_state lt_state; -}; - -struct exynos_dp_device { - struct drm_encoder encoder; - struct device *dev; - struct drm_device *drm_dev; - struct drm_connector connector; - struct drm_panel *panel; - struct drm_bridge *bridge; - struct drm_bridge *ptn_bridge; - struct clk *clock; - unsigned int irq; - void __iomem *reg_base; - - struct video_info *video_info; - struct link_train link_train; - struct work_struct hotplug_work; - struct phy *phy; - int dpms_mode; - int hpd_gpio; - struct videomode vm; -}; - -/* exynos_dp_reg.c */ -void exynos_dp_enable_video_mute(struct exynos_dp_device *dp, bool enable); -void exynos_dp_stop_video(struct exynos_dp_device *dp); -void exynos_dp_lane_swap(struct exynos_dp_device *dp, bool enable); -void exynos_dp_init_analog_param(struct exynos_dp_device *dp); -void exynos_dp_init_interrupt(struct exynos_dp_device *dp); -void exynos_dp_reset(struct exynos_dp_device *dp); -void exynos_dp_swreset(struct exynos_dp_device *dp); -void exynos_dp_config_interrupt(struct exynos_dp_device *dp); -enum pll_status exynos_dp_get_pll_lock_status(struct exynos_dp_device *dp); -void exynos_dp_set_pll_power_down(struct exynos_dp_device *dp, bool enable); -void exynos_dp_set_analog_power_down(struct exynos_dp_device *dp, - enum analog_power_block block, - bool enable); -void exynos_dp_init_analog_func(struct exynos_dp_device *dp); -void exynos_dp_init_hpd(struct exynos_dp_device *dp); -enum dp_irq_type exynos_dp_get_irq_type(struct exynos_dp_device *dp); -void exynos_dp_clear_hotplug_interrupts(struct exynos_dp_device *dp); -void exynos_dp_reset_aux(struct exynos_dp_device *dp); -void exynos_dp_init_aux(struct exynos_dp_device *dp); -int exynos_dp_get_plug_in_status(struct exynos_dp_device *dp); -void exynos_dp_enable_sw_function(struct exynos_dp_device *dp); -int exynos_dp_start_aux_transaction(struct exynos_dp_device *dp); -int exynos_dp_write_byte_to_dpcd(struct exynos_dp_device *dp, - unsigned int reg_addr, - unsigned char data); -int exynos_dp_read_byte_from_dpcd(struct exynos_dp_device *dp, - unsigned int reg_addr, - unsigned char *data); -int exynos_dp_write_bytes_to_dpcd(struct exynos_dp_device *dp, - unsigned int reg_addr, - unsigned int count, - unsigned char data[]); -int exynos_dp_read_bytes_from_dpcd(struct exynos_dp_device *dp, - unsigned int reg_addr, - unsigned int count, - unsigned char data[]); -int exynos_dp_select_i2c_device(struct exynos_dp_device *dp, - unsigned int device_addr, - unsigned int reg_addr); -int exynos_dp_read_byte_from_i2c(struct exynos_dp_device *dp, - unsigned int device_addr, - unsigned int reg_addr, - unsigned int *data); -int exynos_dp_read_bytes_from_i2c(struct exynos_dp_device *dp, - unsigned int device_addr, - unsigned int reg_addr, - unsigned int count, - unsigned char edid[]); -void exynos_dp_set_link_bandwidth(struct exynos_dp_device *dp, u32 bwtype); -void exynos_dp_get_link_bandwidth(struct exynos_dp_device *dp, u32 *bwtype); -void exynos_dp_set_lane_count(struct exynos_dp_device *dp, u32 count); -void exynos_dp_get_lane_count(struct exynos_dp_device *dp, u32 *count); -void exynos_dp_enable_enhanced_mode(struct exynos_dp_device *dp, bool enable); -void exynos_dp_set_training_pattern(struct exynos_dp_device *dp, - enum pattern_set pattern); -void exynos_dp_set_lane0_pre_emphasis(struct exynos_dp_device *dp, u32 level); -void exynos_dp_set_lane1_pre_emphasis(struct exynos_dp_device *dp, u32 level); -void exynos_dp_set_lane2_pre_emphasis(struct exynos_dp_device *dp, u32 level); -void exynos_dp_set_lane3_pre_emphasis(struct exynos_dp_device *dp, u32 level); -void exynos_dp_set_lane0_link_training(struct exynos_dp_device *dp, - u32 training_lane); -void exynos_dp_set_lane1_link_training(struct exynos_dp_device *dp, - u32 training_lane); -void exynos_dp_set_lane2_link_training(struct exynos_dp_device *dp, - u32 training_lane); -void exynos_dp_set_lane3_link_training(struct exynos_dp_device *dp, - u32 training_lane); -u32 exynos_dp_get_lane0_link_training(struct exynos_dp_device *dp); -u32 exynos_dp_get_lane1_link_training(struct exynos_dp_device *dp); -u32 exynos_dp_get_lane2_link_training(struct exynos_dp_device *dp); -u32 exynos_dp_get_lane3_link_training(struct exynos_dp_device *dp); -void exynos_dp_reset_macro(struct exynos_dp_device *dp); -void exynos_dp_init_video(struct exynos_dp_device *dp); - -void exynos_dp_set_video_color_format(struct exynos_dp_device *dp); -int exynos_dp_is_slave_video_stream_clock_on(struct exynos_dp_device *dp); -void exynos_dp_set_video_cr_mn(struct exynos_dp_device *dp, - enum clock_recovery_m_value_type type, - u32 m_value, - u32 n_value); -void exynos_dp_set_video_timing_mode(struct exynos_dp_device *dp, u32 type); -void exynos_dp_enable_video_master(struct exynos_dp_device *dp, bool enable); -void exynos_dp_start_video(struct exynos_dp_device *dp); -int exynos_dp_is_video_stream_on(struct exynos_dp_device *dp); -void exynos_dp_config_video_slave_mode(struct exynos_dp_device *dp); -void exynos_dp_enable_scrambling(struct exynos_dp_device *dp); -void exynos_dp_disable_scrambling(struct exynos_dp_device *dp); - -/* I2C EDID Chip ID, Slave Address */ -#define I2C_EDID_DEVICE_ADDR 0x50 -#define I2C_E_EDID_DEVICE_ADDR 0x30 - -#define EDID_BLOCK_LENGTH 0x80 -#define EDID_HEADER_PATTERN 0x00 -#define EDID_EXTENSION_FLAG 0x7e -#define EDID_CHECKSUM 0x7f - -/* DP_MAX_LANE_COUNT */ -#define DPCD_ENHANCED_FRAME_CAP(x) (((x) >> 7) & 0x1) -#define DPCD_MAX_LANE_COUNT(x) ((x) & 0x1f) - -/* DP_LANE_COUNT_SET */ -#define DPCD_LANE_COUNT_SET(x) ((x) & 0x1f) - -/* DP_TRAINING_LANE0_SET */ -#define DPCD_PRE_EMPHASIS_SET(x) (((x) & 0x3) << 3) -#define DPCD_PRE_EMPHASIS_GET(x) (((x) >> 3) & 0x3) -#define DPCD_VOLTAGE_SWING_SET(x) (((x) & 0x3) << 0) -#define DPCD_VOLTAGE_SWING_GET(x) (((x) >> 0) & 0x3) - -#endif /* _EXYNOS_DP_CORE_H */ diff --git a/include/drm/bridge/analogix_dp.h b/include/drm/bridge/analogix_dp.h new file mode 100644 index 000000000000..d1188db0d11e --- /dev/null +++ b/include/drm/bridge/analogix_dp.h @@ -0,0 +1,40 @@ +/* + * Analogix DP (Display Port) Core interface driver. + * + * Copyright (C) 2015 Rockchip Electronics Co., Ltd. + * + * This program is free software; you can redistribute it and/or modify it + * under the terms of the GNU General Public License as published by the + * Free Software Foundation; either version 2 of the License, or (at your + * option) any later version. + */ +#ifndef _ANALOGIX_DP_H_ +#define _ANALOGIX_DP_H_ + +#include <drm/drm_crtc.h> + +enum analogix_dp_devtype { + EXYNOS_DP, +}; + +struct analogix_dp_plat_data { + enum analogix_dp_devtype dev_type; + struct drm_panel *panel; + struct drm_encoder *encoder; + struct drm_connector *connector; + + int (*power_on)(struct analogix_dp_plat_data *); + int (*power_off)(struct analogix_dp_plat_data *); + int (*attach)(struct analogix_dp_plat_data *, struct drm_bridge *, + struct drm_connector *); + int (*get_modes)(struct analogix_dp_plat_data *); +}; + +int analogix_dp_resume(struct device *dev); +int analogix_dp_suspend(struct device *dev); + +int analogix_dp_bind(struct device *dev, struct drm_device *drm_dev, + struct analogix_dp_plat_data *plat_data); +void analogix_dp_unbind(struct device *dev, struct device *master, void *data); + +#endif /* _ANALOGIX_DP_H_ */