1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * LCD: LG4573, TFT 4.3", 480x800, RGB24 4 * LCD initialization via SPI 5 * 6 */ 7 #include <common.h> 8 #include <errno.h> 9 #include <spi.h> 10 11 #define PWR_ON_DELAY_MSECS 120 12 13 static int lb043wv_spi_write_u16(struct spi_slave *spi, u16 val) 14 { 15 unsigned long flags = SPI_XFER_BEGIN; 16 unsigned short buf16 = htons(val); 17 int ret = 0; 18 19 flags |= SPI_XFER_END; 20 21 ret = spi_xfer(spi, 16, &buf16, NULL, flags); 22 if (ret) 23 debug("%s: Failed to send: %d\n", __func__, ret); 24 25 return ret; 26 } 27 28 static void lb043wv_spi_write_u16_array(struct spi_slave *spi, u16 *buff, 29 int size) 30 { 31 int i; 32 33 for (i = 0; i < size; i++) 34 lb043wv_spi_write_u16(spi, buff[i]); 35 } 36 37 static void lb043wv_display_mode_settings(struct spi_slave *spi) 38 { 39 static u16 display_mode_settings[] = { 40 0x703A, 41 0x7270, 42 0x70B1, 43 0x7208, 44 0x723B, 45 0x720F, 46 0x70B2, 47 0x7200, 48 0x72C8, 49 0x70B3, 50 0x7200, 51 0x70B4, 52 0x7200, 53 0x70B5, 54 0x7242, 55 0x7210, 56 0x7210, 57 0x7200, 58 0x7220, 59 0x70B6, 60 0x720B, 61 0x720F, 62 0x723C, 63 0x7213, 64 0x7213, 65 0x72E8, 66 0x70B7, 67 0x7246, 68 0x7206, 69 0x720C, 70 0x7200, 71 0x7200, 72 }; 73 74 debug("transfer display mode settings\n"); 75 lb043wv_spi_write_u16_array(spi, display_mode_settings, 76 ARRAY_SIZE(display_mode_settings)); 77 } 78 79 static void lb043wv_power_settings(struct spi_slave *spi) 80 { 81 static u16 power_settings[] = { 82 0x70C0, 83 0x7201, 84 0x7211, 85 0x70C3, 86 0x7207, 87 0x7203, 88 0x7204, 89 0x7204, 90 0x7204, 91 0x70C4, 92 0x7212, 93 0x7224, 94 0x7218, 95 0x7218, 96 0x7202, 97 0x7249, 98 0x70C5, 99 0x726F, 100 0x70C6, 101 0x7241, 102 0x7263, 103 }; 104 105 debug("transfer power settings\n"); 106 lb043wv_spi_write_u16_array(spi, power_settings, 107 ARRAY_SIZE(power_settings)); 108 } 109 110 static void lb043wv_gamma_settings(struct spi_slave *spi) 111 { 112 static u16 gamma_settings[] = { 113 0x70D0, 114 0x7203, 115 0x7207, 116 0x7273, 117 0x7235, 118 0x7200, 119 0x7201, 120 0x7220, 121 0x7200, 122 0x7203, 123 0x70D1, 124 0x7203, 125 0x7207, 126 0x7273, 127 0x7235, 128 0x7200, 129 0x7201, 130 0x7220, 131 0x7200, 132 0x7203, 133 0x70D2, 134 0x7203, 135 0x7207, 136 0x7273, 137 0x7235, 138 0x7200, 139 0x7201, 140 0x7220, 141 0x7200, 142 0x7203, 143 0x70D3, 144 0x7203, 145 0x7207, 146 0x7273, 147 0x7235, 148 0x7200, 149 0x7201, 150 0x7220, 151 0x7200, 152 0x7203, 153 0x70D4, 154 0x7203, 155 0x7207, 156 0x7273, 157 0x7235, 158 0x7200, 159 0x7201, 160 0x7220, 161 0x7200, 162 0x7203, 163 0x70D5, 164 0x7203, 165 0x7207, 166 0x7273, 167 0x7235, 168 0x7200, 169 0x7201, 170 0x7220, 171 0x7200, 172 0x7203, 173 }; 174 175 debug("transfer gamma settings\n"); 176 lb043wv_spi_write_u16_array(spi, gamma_settings, 177 ARRAY_SIZE(gamma_settings)); 178 } 179 180 static void lb043wv_display_on(struct spi_slave *spi) 181 { 182 static u16 sleep_out = 0x7011; 183 static u16 display_on = 0x7029; 184 185 lb043wv_spi_write_u16(spi, sleep_out); 186 mdelay(PWR_ON_DELAY_MSECS); 187 lb043wv_spi_write_u16(spi, display_on); 188 } 189 190 int lg4573_spi_startup(unsigned int bus, unsigned int cs, 191 unsigned int max_hz, unsigned int spi_mode) 192 { 193 struct spi_slave *spi; 194 int ret; 195 196 spi = spi_setup_slave(bus, cs, max_hz, spi_mode); 197 if (!spi) { 198 debug("%s: Failed to set up slave\n", __func__); 199 return -1; 200 } 201 202 ret = spi_claim_bus(spi); 203 if (ret) { 204 debug("%s: Failed to claim SPI bus: %d\n", __func__, ret); 205 goto err_claim_bus; 206 } 207 208 lb043wv_display_mode_settings(spi); 209 lb043wv_power_settings(spi); 210 lb043wv_gamma_settings(spi); 211 212 lb043wv_display_on(spi); 213 return 0; 214 err_claim_bus: 215 spi_free_slave(spi); 216 return -1; 217 } 218 219 static int do_lgset(cmd_tbl_t *cmdtp, int flag, int argc, 220 char * const argv[]) 221 { 222 lg4573_spi_startup(CONFIG_LG4573_BUS, CONFIG_LG4573_CS, 10000000, 223 SPI_MODE_0); 224 return 0; 225 } 226 227 U_BOOT_CMD( 228 lgset, 2, 1, do_lgset, 229 "set lgdisplay", 230 "" 231 ); 232