--- /dev/null
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (C) 2024 Jonas Schwöbel <jonasschwoebel@yahoo.de>
+ * Copyright (C) 2024 Svyatoslav Ryhel <clamor95@gmail.com>
+ */
+
+#include <dm.h>
+#include <i2c.h>
+#include <log.h>
+#include <backlight.h>
+#include <panel.h>
+#include <linux/delay.h>
+#include <linux/err.h>
+#include <power/regulator.h>
+
+#include <asm/gpio.h>
+
+/* TOP */
+#define TOPCFG0 0x00
+#define ROMI2C_PRESCALE 0x01
+#define HDCPI2C_PRESCALE 0x02
+#define GPIO 0x03
+#define GPIO_OUT_ENB 0x04
+#define TESTI2C_CTL 0x05
+#define I2CMTIMEOUT 0x06
+#define TOPCFG1 0x07
+#define TOPCFG2 0x08
+#define TOPCFG3 0x09
+#define TOPCFG4 0x0A
+#define CLKSWRST 0x0B
+#define CADETB_CTL 0x0C
+
+/* Video Attribute */
+#define HTOTAL_L 0x10
+#define HTOTAL_H 0x11
+#define HSTART_L 0x12
+#define HSTART_H 0x13
+#define HWIDTH_L 0x14
+#define HWIDTH_H 0x15
+#define VTOTAL_L 0x16
+#define VTOTAL_H 0x17
+#define VSTART_L 0x18
+#define VSTART_H 0x19
+#define VHEIGHT_L 0x1A
+#define VHEIGHT_H 0x1B
+#define HSPHSW_L 0x1C
+#define HSPHSW_H 0x1D
+#define VSPVSW_L 0x1E
+#define VSPVSW_H 0x1F
+#define MISC0 0x20
+#define MISC1 0x21
+
+/* Video Capture */
+#define VCAPCTRL0 0x24
+#define VCAPCTRL1 0x25
+#define VCAPCTRL2 0x26
+#define VCAPCTRL3 0x27
+#define VCAPCTRL4 0x28
+#define VCAP_MEASURE 0x29
+
+/* Main Link Control */
+#define NVID_L 0x2C
+#define NVID_M 0x2D
+#define NVID_H 0x2E
+#define LINK_CTRL0 0x2F
+#define LINK_CTRL1 0x30
+#define LINK_DEBUG 0x31
+#define ERR_POS 0x32
+#define ERR_PAT 0x33
+#define LINK_DEB_SEL 0x34
+#define IDLE_PATTERN 0x35
+#define TU_SIZE 0x36
+#define CRC_CTRL 0x37
+#define CRC_OUT 0x38
+
+/* AVI-2 InfoFrame */
+#define SD_CTRL0 0x3A
+#define SD_CTRL1 0x3B
+#define SD_HB0 0x3C
+#define SD_HB1 0x3D
+#define SD_HB2 0x3E
+#define SD_HB3 0x3F
+#define SD_DB0 0x40
+#define SD_DB1 0x41
+#define SD_DB2 0x42
+#define SD_DB3 0x43
+#define SD_DB4 0x44
+#define SD_DB5 0x45
+#define SD_DB6 0x46
+#define SD_DB7 0x47
+#define SD_DB8 0x48
+#define SD_DB9 0x49
+#define SD_DB10 0x4A
+#define SD_DB11 0x4B
+#define SD_DB12 0x4C
+#define SD_DB13 0x4D
+#define SD_DB14 0x4E
+#define SD_DB15 0x4F
+
+/* Aux Channel and PCS */
+#define DPCD_REV 0X50
+#define MAX_LINK_RATE 0x51
+#define MAX_LANE_COUNT 0x52
+#define MAX_DOWNSPREAD 0x53
+#define NORP 0x54
+#define DOWNSTRMPORT_PRE 0x55
+#define MLINK_CH_CODING 0x56
+#define RCV_P0_CAP0 0x58
+#define RCV_P0_CAP1 0x59
+#define RCV_P1_CAP0 0x5A
+#define RCV_P1_CAP1 0x5B
+#define DOWNSPREAD_CTL 0x5C
+#define LINK_BW 0x5D
+#define LANE_CNT 0x5E
+#define TRAINING_CTL 0x5F
+#define QUALTEST_CTL 0x60
+#define SINK_COUNT 0x61
+#define DEV_SERVICE_IRQ 0x62
+#define LANE01_STATUS 0x63
+#define LANE23_STATUS 0x64
+#define LANE_STATUS_UPDATE 0x65
+#define SINK_STATUS 0x66
+#define AUX_NOISE 0x67
+#define TEST_MODE 0x69
+#define TEST_PATTERN0 0x6A
+#define TEST_PATTERN1 0x6B
+#define TEST_PATTERN2 0x6C
+#define SIGNATURE 0x6D
+#define PCSCFG 0x6E
+#define AUXCTRL0 0x6f
+#define AUXCTRL2 0x70
+#define AUXCTRL1 0x71
+#define HPDCTL0 0x72
+#define HPDCTL1 0x73
+#define LINK_STATE_CTRL 0x74
+#define SWRST 0x75
+#define LINK_IRQ 0x76
+#define AUXIRQ_CTRL 0x77
+#define HPD2_IRQ_CTRL 0x78
+#define SW_TRAIN_CTRL 0x79
+#define SW_DRV_SET 0x7A
+#define SW_PRE_SET 0x7B
+#define DPCD_ADDR_L 0x7D
+#define DPCD_ADDR_M 0x7E
+#define DPCD_ADDR_H 0x7F
+#define DPCD_LENGTH 0x80
+#define DPCD_WDATA 0x81
+#define DPCD_RDATA 0x82
+#define DPCD_CTL 0x83
+#define DPCD_STATUS 0x84
+#define AUX_STATUS 0x85
+#define I2CTOAUX_RELENGTH 0x86
+#define AUX_RETRY_CTRL 0x87
+#define TIMEOUT_CTRL 0x88
+#define I2CCMD_OPT1 0x89
+#define AUXCMD_ERR_IRQ 0x8A
+#define AUXCMD_OPT2 0x8B
+#define HDCP_Reserved 0x8C
+
+/* Audio InfoFrame */
+#define TX_MVID0 0x90
+#define TX_MVID1 0x91
+#define TX_MVID2 0x92
+#define TX_MVID_OFF 0x93
+#define TX_MAUD0 0x94
+#define TX_MAUD1 0x95
+#define TX_MAUD2 0x96
+#define TX_MAUD_OFF 0x97
+#define MN_CTRL 0x98
+#define MOUT0 0x99
+#define MOUT1 0x9A
+#define MOUT2 0x9B
+
+/* Audio Control */
+#define NAUD_L 0x9F
+#define NAUD_M 0xA0
+#define NAUD_H 0xA1
+#define AUD_CTRL0 0xA2
+#define AUD_CTRL1 0xA3
+#define LANE_POL 0xAA
+#define LANE_EN 0xAB
+#define LANE_MAP 0xAC
+#define SCR_POLY0 0xAD
+#define SCR_POLY1 0xAE
+#define PRBS7_POLY 0xAF
+
+/* Video Pre-process */
+#define MISC_SHDOW 0xB0
+#define VCAPCPCTL0 0xB1
+#define VCAPCPCTL1 0xB2
+#define VCAPCPCTL2 0xB3
+#define CSCPAR 0xB4
+#define I2CTODPCDSTATUS2 0xBA
+#define AUXCTL_REG 0xBB
+
+/* Page 2 */
+#define SEL_PIO1 0x24
+#define SEL_PIO2 0x25
+#define SEL_PIO3 0x26
+#define CHIP_VER_L 0x82
+
+struct dp501_priv {
+ struct udevice *panel;
+ struct display_timing timing;
+
+ struct udevice *chip2;
+
+ struct udevice *vdd;
+ struct gpio_desc reset_gpio;
+ struct gpio_desc enable_gpio;
+};
+
+static int dp501_sw_init(struct udevice *dev)
+{
+ struct dp501_priv *priv = dev_get_priv(dev);
+ int i;
+ u8 val;
+
+ dm_i2c_reg_write(dev, TOPCFG4, 0x30);
+ udelay(200);
+ dm_i2c_reg_write(dev, TOPCFG4, 0x0c);
+ dm_i2c_reg_write(dev, 0x8f, 0x02);
+
+ /* check for connected panel during 1 msec */
+ for (i = 0; i < 5; i++) {
+ val = dm_i2c_reg_read(dev, 0x8d);
+ val &= BIT(2);
+ if (val)
+ break;
+
+ udelay(200);
+ }
+
+ if (!val) {
+ log_debug("%s: panel is not connected!\n", __func__);
+ return -ENODEV;
+ }
+
+ dm_i2c_reg_write(priv->chip2, SEL_PIO1, 0x02);
+ dm_i2c_reg_write(priv->chip2, SEL_PIO2, 0x04);
+ dm_i2c_reg_write(priv->chip2, SEL_PIO3, 0x10);
+
+ dm_i2c_reg_write(dev, LINK_STATE_CTRL, 0xa0);
+ dm_i2c_reg_write(dev, 0x8f, 0x02);
+ dm_i2c_reg_write(dev, TOPCFG1, 0x16);
+ dm_i2c_reg_write(dev, TOPCFG0, 0x24);
+ dm_i2c_reg_write(dev, HPD2_IRQ_CTRL, 0x30);
+ dm_i2c_reg_write(dev, AUXIRQ_CTRL, 0xff);
+ dm_i2c_reg_write(dev, LINK_IRQ, 0xff);
+
+ /* auto detect DVO timing */
+ dm_i2c_reg_write(dev, VCAPCTRL3, 0x30);
+
+ /* reset tpfifo at v blank */
+ dm_i2c_reg_write(dev, LINK_CTRL0, 0x82);
+
+ dm_i2c_reg_write(dev, VCAPCTRL4, 0x07);
+ dm_i2c_reg_write(dev, AUX_RETRY_CTRL, 0x7f);
+ dm_i2c_reg_write(dev, TIMEOUT_CTRL, 0x1e);
+ dm_i2c_reg_write(dev, AUXCTL_REG, 0x06);
+
+ /* DPCD readable */
+ dm_i2c_reg_write(dev, HPDCTL0, 0xa9);
+
+ /* Scramble on */
+ dm_i2c_reg_write(dev, QUALTEST_CTL, 0x00);
+
+ dm_i2c_reg_write(dev, 0x8f, 0x02);
+
+ dm_i2c_reg_write(dev, VCAPCTRL0, 0xc4);
+
+ /* set color depth 8bit (0x00: 6bit; 0x20: 8bit; 0x40: 10bit) */
+ dm_i2c_reg_write(dev, MISC0, 0x20);
+
+ dm_i2c_reg_write(dev, VCAPCPCTL2, 0x01);
+
+ /* check if bridge returns ready status */
+ for (i = 0; i < 5; i++) {
+ val = dm_i2c_reg_read(dev, LINK_IRQ);
+ val &= BIT(0);
+ if (val)
+ break;
+
+ udelay(200);
+ }
+
+ if (!val) {
+ log_debug("%s: bridge is not ready\n", __func__);
+ return -ENODEV;
+ }
+
+ return 0;
+}
+
+static void dpcd_configure(struct udevice *dev, u32 config, bool write)
+{
+ dm_i2c_reg_write(dev, DPCD_ADDR_L, (u8)(config >> 8));
+ dm_i2c_reg_write(dev, DPCD_ADDR_M, (u8)(config >> 16));
+ dm_i2c_reg_write(dev, DPCD_ADDR_H, (u8)((config >> 24) | BIT(7)));
+ dm_i2c_reg_write(dev, DPCD_LENGTH, 0x00);
+ dm_i2c_reg_write(dev, LINK_IRQ, 0x20);
+
+ if (write)
+ dm_i2c_reg_write(dev, DPCD_WDATA, (u8)(config & 0xff));
+
+ dm_i2c_reg_write(dev, DPCD_CTL, 0x01);
+
+ udelay(10);
+}
+
+static int dump_dpcd_data(struct udevice *dev, u32 config, u8 *data)
+{
+ int i;
+ u8 value;
+
+ dpcd_configure(dev, config, false);
+
+ value = dm_i2c_reg_read(dev, DPCD_CTL);
+ if (value)
+ return -ENODATA;
+
+ for (i = 0; i < 5; i++) {
+ value = dm_i2c_reg_read(dev, LINK_IRQ);
+ value &= BIT(5);
+ if (value)
+ break;
+
+ udelay(100);
+ }
+
+ if (!value)
+ return -ENODATA;
+
+ value = dm_i2c_reg_read(dev, DPCD_STATUS);
+ if (!(value & 0xe0))
+ *data = dm_i2c_reg_read(dev, DPCD_RDATA);
+ else
+ return -ENODATA;
+
+ return 0;
+}
+
+static int dp501_dpcd_dump(struct udevice *dev, u32 config, u8 *data)
+{
+ int i, ret;
+
+ for (i = 0; i < 5; i++) {
+ ret = dump_dpcd_data(dev, config, data);
+ if (!ret)
+ break;
+
+ udelay(100);
+ }
+
+ return ret;
+}
+
+static int dp501_reset_link(struct udevice *dev)
+{
+ dm_i2c_reg_write(dev, TRAINING_CTL, 0x00);
+ dm_i2c_reg_write(dev, SWRST, 0xf8);
+ dm_i2c_reg_write(dev, SWRST, 0x00);
+
+ return -ENODEV;
+}
+
+static int dp501_link_training(struct udevice *dev)
+{
+ int i, ret;
+ u8 lane, link, link_out;
+ u8 lane_cnt, lane01, lane23;
+
+ dpcd_configure(dev, 0x030000, true);
+ dpcd_configure(dev, 0x03011c, true);
+ dpcd_configure(dev, 0x0301f8, true);
+
+ ret = dp501_dpcd_dump(dev, 0x90000100, &link);
+ if (ret) {
+ log_debug("%s: link dump failed %d\n", __func__, ret);
+ return dp501_reset_link(dev);
+ }
+
+ ret = dp501_dpcd_dump(dev, 0x90000200, &lane);
+ if (ret) {
+ log_debug("%s: lane dump failed %d\n", __func__, ret);
+ return dp501_reset_link(dev);
+ }
+
+ /* Software trainig */
+ for (i = 10; i > 0; i--) {
+ dm_i2c_reg_write(dev, LINK_BW, link);
+ dm_i2c_reg_write(dev, LANE_CNT, lane | BIT(7));
+
+ link_out = dm_i2c_reg_read(dev, LINK_BW);
+ lane_cnt = dm_i2c_reg_read(dev, LANE_CNT);
+
+ if (link_out == link &&
+ (lane_cnt == (lane | BIT(7))))
+ break;
+
+ udelay(500);
+ }
+
+ if (!i)
+ return dp501_reset_link(dev);
+
+ dm_i2c_reg_write(dev, LINK_STATE_CTRL, 0x00);
+ dm_i2c_reg_write(dev, TRAINING_CTL, 0x0d);
+
+ /* check if bridge returns link ready status */
+ for (i = 0; i < 100; i++) {
+ link_out = dm_i2c_reg_read(dev, LINK_IRQ);
+ link_out &= BIT(1);
+ if (link_out) {
+ dm_i2c_reg_write(dev, LINK_IRQ, 0xff);
+ break;
+ }
+
+ udelay(100);
+ }
+
+ if (!link_out) {
+ log_debug("%s: link prepare failed %d\n",
+ __func__, link_out);
+ return dp501_reset_link(dev);
+ }
+
+ lane01 = dm_i2c_reg_read(dev, LANE01_STATUS);
+ lane23 = dm_i2c_reg_read(dev, LANE23_STATUS);
+
+ switch (lane_cnt & 0xf) {
+ case 4:
+ if (lane01 == 0x77 &&
+ lane23 == 0x77)
+ return 0;
+ break;
+
+ case 2:
+ if (lane01 == 0x77)
+ return 0;
+ break;
+
+ default:
+ if ((lane01 & 7) == 7)
+ return 0;
+ break;
+ }
+
+ return dp501_reset_link(dev);
+}
+
+static int dp501_attach(struct udevice *dev)
+{
+ struct dp501_priv *priv = dev_get_priv(dev);
+ int ret;
+
+ ret = dp501_sw_init(dev);
+ if (ret)
+ return ret;
+
+ mdelay(90);
+
+ ret = dp501_link_training(dev);
+ if (ret)
+ return ret;
+
+ /* Perform panel HW setup */
+ return panel_enable_backlight(priv->panel);
+}
+
+static int dp501_set_backlight(struct udevice *dev, int percent)
+{
+ struct dp501_priv *priv = dev_get_priv(dev);
+
+ return panel_set_backlight(priv->panel, percent);
+}
+
+static int dp501_panel_timings(struct udevice *dev,
+ struct display_timing *timing)
+{
+ struct dp501_priv *priv = dev_get_priv(dev);
+
+ memcpy(timing, &priv->timing, sizeof(*timing));
+ return 0;
+}
+
+static void dp501_hw_init(struct dp501_priv *priv)
+{
+ dm_gpio_set_value(&priv->reset_gpio, 1);
+
+ regulator_set_enable_if_allowed(priv->vdd, 1);
+ dm_gpio_set_value(&priv->enable_gpio, 1);
+
+ udelay(100);
+
+ dm_gpio_set_value(&priv->reset_gpio, 0);
+ mdelay(80);
+}
+
+static int dp501_setup(struct udevice *dev)
+{
+ struct dm_i2c_chip *chip = dev_get_parent_plat(dev);
+ struct dp501_priv *priv = dev_get_priv(dev);
+ struct udevice *bus = dev_get_parent(dev);
+ int ret;
+
+ /* get panel */
+ ret = uclass_get_device_by_phandle(UCLASS_PANEL, dev,
+ "panel", &priv->panel);
+ if (ret) {
+ log_debug("%s: Cannot get panel: ret=%d\n", __func__, ret);
+ return log_ret(ret);
+ }
+
+ /* get regulators */
+ ret = device_get_supply_regulator(dev, "power-supply", &priv->vdd);
+ if (ret) {
+ log_debug("%s: vddc regulator error: %d\n", __func__, ret);
+ if (ret != -ENOENT)
+ return log_ret(ret);
+ }
+
+ /* get gpios */
+ ret = gpio_request_by_name(dev, "reset-gpios", 0,
+ &priv->reset_gpio, GPIOD_IS_OUT);
+ if (ret) {
+ log_debug("%s: Could not decode reset-gpios (%d)\n",
+ __func__, ret);
+ return ret;
+ }
+
+ ret = gpio_request_by_name(dev, "enable-gpios", 0,
+ &priv->enable_gpio, GPIOD_IS_OUT);
+ if (ret) {
+ log_debug("%s: Could not decode enable-gpios (%d)\n",
+ __func__, ret);
+ return ret;
+ }
+
+ ret = i2c_get_chip(bus, chip->chip_addr + 2, 1, &priv->chip2);
+ if (ret) {
+ log_debug("%s: cannot get second PMIC I2C chip (err %d)\n",
+ __func__, ret);
+ return ret;
+ }
+
+ dp501_hw_init(priv);
+
+ /* get EDID */
+ return panel_get_display_timing(priv->panel, &priv->timing);
+}
+
+static int dp501_probe(struct udevice *dev)
+{
+ if (device_get_uclass_id(dev->parent) != UCLASS_I2C)
+ return -EPROTONOSUPPORT;
+
+ return dp501_setup(dev);
+}
+
+struct panel_ops dp501_ops = {
+ .enable_backlight = dp501_attach,
+ .set_backlight = dp501_set_backlight,
+ .get_display_timing = dp501_panel_timings,
+};
+
+static const struct udevice_id dp501_ids[] = {
+ { .compatible = "parade,dp501" },
+ { }
+};
+
+U_BOOT_DRIVER(dp501) = {
+ .name = "dp501",
+ .id = UCLASS_PANEL,
+ .of_match = dp501_ids,
+ .ops = &dp501_ops,
+ .probe = dp501_probe,
+ .priv_auto = sizeof(struct dp501_priv),
+};
projects / u-boot.git / commitdiff