1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * (C) Copyright 2012 - 2013 CompuLab, Ltd. <www.compulab.co.il> 4 * 5 * Authors: Nikita Kiryanov <nikita (at) compulab.co.il> 6 * 7 * Parsing code based on linux/drivers/video/pxafb.c 8 */ 9 10 #include <common.h> 11 #include <asm/gpio.h> 12 #include <asm/io.h> 13 #include <stdio_dev.h> 14 #include <asm/arch/dss.h> 15 #include <lcd.h> 16 #include <scf0403_lcd.h> 17 #include <asm/arch-omap3/dss.h> 18 19 enum display_type { 20 NONE, 21 DVI, 22 DVI_CUSTOM, 23 DATA_IMAGE, /* #define CONFIG_SCF0403_LCD to use */ 24 }; 25 26 #define CMAP_ADDR 0x80100000 27 28 /* 29 * The frame buffer is allocated before we have the chance to parse user input. 30 * To make sure enough memory is allocated for all resolutions, we define 31 * vl_{col | row} to the maximal resolution supported by OMAP3. 32 */ 33 vidinfo_t panel_info = { 34 .vl_col = 1400, 35 .vl_row = 1050, 36 .vl_bpix = LCD_BPP, 37 .cmap = (ushort *)CMAP_ADDR, 38 }; 39 40 static struct panel_config panel_cfg; 41 static enum display_type lcd_def; 42 43 /* 44 * A note on DVI presets; 45 * U-Boot can convert 8 bit BMP data to 16 bit BMP data, and OMAP DSS can 46 * convert 16 bit data into 24 bit data. Thus, GFXFORMAT_RGB16 allows us to 47 * support two BMP types with one setting. 48 */ 49 static const struct panel_config preset_dvi_640X480 = { 50 .lcd_size = PANEL_LCD_SIZE(640, 480), 51 .timing_h = DSS_HBP(48) | DSS_HFP(16) | DSS_HSW(96), 52 .timing_v = DSS_VBP(33) | DSS_VFP(10) | DSS_VSW(2), 53 .pol_freq = DSS_IHS | DSS_IVS | DSS_IPC, 54 .divisor = 12 | (1 << 16), 55 .data_lines = LCD_INTERFACE_24_BIT, 56 .panel_type = ACTIVE_DISPLAY, 57 .load_mode = 2, 58 .gfx_format = GFXFORMAT_RGB16, 59 }; 60 61 static const struct panel_config preset_dvi_800X600 = { 62 .lcd_size = PANEL_LCD_SIZE(800, 600), 63 .timing_h = DSS_HBP(88) | DSS_HFP(40) | DSS_HSW(128), 64 .timing_v = DSS_VBP(23) | DSS_VFP(1) | DSS_VSW(4), 65 .pol_freq = DSS_IHS | DSS_IVS | DSS_IPC, 66 .divisor = 8 | (1 << 16), 67 .data_lines = LCD_INTERFACE_24_BIT, 68 .panel_type = ACTIVE_DISPLAY, 69 .load_mode = 2, 70 .gfx_format = GFXFORMAT_RGB16, 71 }; 72 73 static const struct panel_config preset_dvi_1024X768 = { 74 .lcd_size = PANEL_LCD_SIZE(1024, 768), 75 .timing_h = DSS_HBP(160) | DSS_HFP(24) | DSS_HSW(136), 76 .timing_v = DSS_VBP(29) | DSS_VFP(3) | DSS_VSW(6), 77 .pol_freq = DSS_IHS | DSS_IVS | DSS_IPC, 78 .divisor = 5 | (1 << 16), 79 .data_lines = LCD_INTERFACE_24_BIT, 80 .panel_type = ACTIVE_DISPLAY, 81 .load_mode = 2, 82 .gfx_format = GFXFORMAT_RGB16, 83 }; 84 85 static const struct panel_config preset_dvi_1152X864 = { 86 .lcd_size = PANEL_LCD_SIZE(1152, 864), 87 .timing_h = DSS_HBP(256) | DSS_HFP(64) | DSS_HSW(128), 88 .timing_v = DSS_VBP(32) | DSS_VFP(1) | DSS_VSW(3), 89 .pol_freq = DSS_IHS | DSS_IVS | DSS_IPC, 90 .divisor = 4 | (1 << 16), 91 .data_lines = LCD_INTERFACE_24_BIT, 92 .panel_type = ACTIVE_DISPLAY, 93 .load_mode = 2, 94 .gfx_format = GFXFORMAT_RGB16, 95 }; 96 97 static const struct panel_config preset_dvi_1280X960 = { 98 .lcd_size = PANEL_LCD_SIZE(1280, 960), 99 .timing_h = DSS_HBP(312) | DSS_HFP(96) | DSS_HSW(112), 100 .timing_v = DSS_VBP(36) | DSS_VFP(1) | DSS_VSW(3), 101 .pol_freq = DSS_IHS | DSS_IVS | DSS_IPC, 102 .divisor = 3 | (1 << 16), 103 .data_lines = LCD_INTERFACE_24_BIT, 104 .panel_type = ACTIVE_DISPLAY, 105 .load_mode = 2, 106 .gfx_format = GFXFORMAT_RGB16, 107 }; 108 109 static const struct panel_config preset_dvi_1280X1024 = { 110 .lcd_size = PANEL_LCD_SIZE(1280, 1024), 111 .timing_h = DSS_HBP(248) | DSS_HFP(48) | DSS_HSW(112), 112 .timing_v = DSS_VBP(38) | DSS_VFP(1) | DSS_VSW(3), 113 .pol_freq = DSS_IHS | DSS_IVS | DSS_IPC, 114 .divisor = 3 | (1 << 16), 115 .data_lines = LCD_INTERFACE_24_BIT, 116 .panel_type = ACTIVE_DISPLAY, 117 .load_mode = 2, 118 .gfx_format = GFXFORMAT_RGB16, 119 }; 120 121 static const struct panel_config preset_dataimage_480X800 = { 122 .lcd_size = PANEL_LCD_SIZE(480, 800), 123 .timing_h = DSS_HBP(2) | DSS_HFP(2) | DSS_HSW(2), 124 .timing_v = DSS_VBP(17) | DSS_VFP(20) | DSS_VSW(3), 125 .pol_freq = DSS_IVS | DSS_IHS | DSS_IPC | DSS_ONOFF, 126 .divisor = 10 | (1 << 10), 127 .data_lines = LCD_INTERFACE_18_BIT, 128 .panel_type = ACTIVE_DISPLAY, 129 .load_mode = 2, 130 .gfx_format = GFXFORMAT_RGB16, 131 }; 132 133 /* 134 * set_resolution_params() 135 * 136 * Due to usage of multiple display related APIs resolution data is located in 137 * more than one place. This function updates them all. 138 */ 139 static void set_resolution_params(int x, int y) 140 { 141 panel_cfg.lcd_size = PANEL_LCD_SIZE(x, y); 142 panel_info.vl_col = x; 143 panel_info.vl_row = y; 144 lcd_line_length = (panel_info.vl_col * NBITS(panel_info.vl_bpix)) / 8; 145 } 146 147 static void set_preset(const struct panel_config preset, int x_res, int y_res) 148 { 149 panel_cfg = preset; 150 set_resolution_params(x_res, y_res); 151 } 152 153 static enum display_type set_dvi_preset(const struct panel_config preset, 154 int x_res, int y_res) 155 { 156 set_preset(preset, x_res, y_res); 157 return DVI; 158 } 159 160 static enum display_type set_dataimage_preset(const struct panel_config preset, 161 int x_res, int y_res) 162 { 163 set_preset(preset, x_res, y_res); 164 return DATA_IMAGE; 165 } 166 167 /* 168 * parse_mode() - parse the mode parameter of custom lcd settings 169 * 170 * @mode: <res_x>x<res_y> 171 * 172 * Returns -1 on error, 0 on success. 173 */ 174 static int parse_mode(const char *mode) 175 { 176 unsigned int modelen = strlen(mode); 177 int res_specified = 0; 178 unsigned int xres = 0, yres = 0; 179 int yres_specified = 0; 180 int i; 181 182 for (i = modelen - 1; i >= 0; i--) { 183 switch (mode[i]) { 184 case 'x': 185 if (!yres_specified) { 186 yres = simple_strtoul(&mode[i + 1], NULL, 0); 187 yres_specified = 1; 188 } else { 189 goto done_parsing; 190 } 191 192 break; 193 case '0' ... '9': 194 break; 195 default: 196 goto done_parsing; 197 } 198 } 199 200 if (i < 0 && yres_specified) { 201 xres = simple_strtoul(mode, NULL, 0); 202 res_specified = 1; 203 } 204 205 done_parsing: 206 if (res_specified) { 207 set_resolution_params(xres, yres); 208 } else { 209 printf("LCD: invalid mode: %s\n", mode); 210 return -1; 211 } 212 213 return 0; 214 } 215 216 #define PIXEL_CLK_NUMERATOR (26 * 432 / 39) 217 /* 218 * parse_pixclock() - Parse the pixclock parameter of custom lcd settings 219 * 220 * @pixclock: the desired pixel clock 221 * 222 * Returns -1 on error, 0 on success. 223 * 224 * Handling the pixel_clock: 225 * 226 * Pixel clock is defined in the OMAP35x TRM as follows: 227 * pixel_clock = 228 * (SYS_CLK * 2 * PRCM.CM_CLKSEL2_PLL[18:8]) / 229 * (DSS.DISPC_DIVISOR[23:16] * DSS.DISPC_DIVISOR[6:0] * 230 * PRCM.CM_CLKSEL_DSS[4:0] * (PRCM.CM_CLKSEL2_PLL[6:0] + 1)) 231 * 232 * In practice, this means that in order to set the 233 * divisor for the desired pixel clock one needs to 234 * solve the following equation: 235 * 236 * 26 * 432 / (39 * <pixel_clock>) = DSS.DISPC_DIVISOR[6:0] 237 * 238 * NOTE: the explicit equation above is reduced. Do not 239 * try to infer anything from these numbers. 240 */ 241 static int parse_pixclock(char *pixclock) 242 { 243 int divisor, pixclock_val; 244 char *pixclk_start = pixclock; 245 246 pixclock_val = simple_strtoul(pixclock, &pixclock, 10); 247 divisor = DIV_ROUND_UP(PIXEL_CLK_NUMERATOR, pixclock_val); 248 /* 0 and 1 are illegal values for PCD */ 249 if (divisor <= 1) 250 divisor = 2; 251 252 panel_cfg.divisor = divisor | (1 << 16); 253 if (pixclock[0] != '\0') { 254 printf("LCD: invalid value for pixclock:%s\n", pixclk_start); 255 return -1; 256 } 257 258 return 0; 259 } 260 261 /* 262 * parse_setting() - parse a single setting of custom lcd parameters 263 * 264 * @setting: The custom lcd setting <name>:<value> 265 * 266 * Returns -1 on failure, 0 on success. 267 */ 268 static int parse_setting(char *setting) 269 { 270 int num_val; 271 char *setting_start = setting; 272 273 if (!strncmp(setting, "mode:", 5)) { 274 return parse_mode(setting + 5); 275 } else if (!strncmp(setting, "pixclock:", 9)) { 276 return parse_pixclock(setting + 9); 277 } else if (!strncmp(setting, "left:", 5)) { 278 num_val = simple_strtoul(setting + 5, &setting, 0); 279 panel_cfg.timing_h |= DSS_HBP(num_val); 280 } else if (!strncmp(setting, "right:", 6)) { 281 num_val = simple_strtoul(setting + 6, &setting, 0); 282 panel_cfg.timing_h |= DSS_HFP(num_val); 283 } else if (!strncmp(setting, "upper:", 6)) { 284 num_val = simple_strtoul(setting + 6, &setting, 0); 285 panel_cfg.timing_v |= DSS_VBP(num_val); 286 } else if (!strncmp(setting, "lower:", 6)) { 287 num_val = simple_strtoul(setting + 6, &setting, 0); 288 panel_cfg.timing_v |= DSS_VFP(num_val); 289 } else if (!strncmp(setting, "hsynclen:", 9)) { 290 num_val = simple_strtoul(setting + 9, &setting, 0); 291 panel_cfg.timing_h |= DSS_HSW(num_val); 292 } else if (!strncmp(setting, "vsynclen:", 9)) { 293 num_val = simple_strtoul(setting + 9, &setting, 0); 294 panel_cfg.timing_v |= DSS_VSW(num_val); 295 } else if (!strncmp(setting, "hsync:", 6)) { 296 if (simple_strtoul(setting + 6, &setting, 0) == 0) 297 panel_cfg.pol_freq |= DSS_IHS; 298 else 299 panel_cfg.pol_freq &= ~DSS_IHS; 300 } else if (!strncmp(setting, "vsync:", 6)) { 301 if (simple_strtoul(setting + 6, &setting, 0) == 0) 302 panel_cfg.pol_freq |= DSS_IVS; 303 else 304 panel_cfg.pol_freq &= ~DSS_IVS; 305 } else if (!strncmp(setting, "outputen:", 9)) { 306 if (simple_strtoul(setting + 9, &setting, 0) == 0) 307 panel_cfg.pol_freq |= DSS_IEO; 308 else 309 panel_cfg.pol_freq &= ~DSS_IEO; 310 } else if (!strncmp(setting, "pixclockpol:", 12)) { 311 if (simple_strtoul(setting + 12, &setting, 0) == 0) 312 panel_cfg.pol_freq |= DSS_IPC; 313 else 314 panel_cfg.pol_freq &= ~DSS_IPC; 315 } else if (!strncmp(setting, "active", 6)) { 316 panel_cfg.panel_type = ACTIVE_DISPLAY; 317 return 0; /* Avoid sanity check below */ 318 } else if (!strncmp(setting, "passive", 7)) { 319 panel_cfg.panel_type = PASSIVE_DISPLAY; 320 return 0; /* Avoid sanity check below */ 321 } else if (!strncmp(setting, "display:", 8)) { 322 if (!strncmp(setting + 8, "dvi", 3)) { 323 lcd_def = DVI_CUSTOM; 324 return 0; /* Avoid sanity check below */ 325 } 326 } else { 327 printf("LCD: unknown option %s\n", setting_start); 328 return -1; 329 } 330 331 if (setting[0] != '\0') { 332 printf("LCD: invalid value for %s\n", setting_start); 333 return -1; 334 } 335 336 return 0; 337 } 338 339 /* 340 * env_parse_customlcd() - parse custom lcd params from an environment variable. 341 * 342 * @custom_lcd_params: The environment variable containing the lcd params. 343 * 344 * Returns -1 on failure, 0 on success. 345 */ 346 static int parse_customlcd(char *custom_lcd_params) 347 { 348 char params_cpy[160]; 349 char *setting; 350 351 strncpy(params_cpy, custom_lcd_params, 160); 352 setting = strtok(params_cpy, ","); 353 while (setting) { 354 if (parse_setting(setting) < 0) 355 return -1; 356 357 setting = strtok(NULL, ","); 358 } 359 360 /* Currently we don't support changing this via custom lcd params */ 361 panel_cfg.data_lines = LCD_INTERFACE_24_BIT; 362 panel_cfg.gfx_format = GFXFORMAT_RGB16; /* See dvi predefines note */ 363 364 return 0; 365 } 366 367 /* 368 * env_parse_displaytype() - parse display type. 369 * 370 * Parses the environment variable "displaytype", which contains the 371 * name of the display type or preset, in which case it applies its 372 * configurations. 373 * 374 * Returns the type of display that was specified. 375 */ 376 static enum display_type env_parse_displaytype(char *displaytype) 377 { 378 if (!strncmp(displaytype, "dvi640x480", 10)) 379 return set_dvi_preset(preset_dvi_640X480, 640, 480); 380 else if (!strncmp(displaytype, "dvi800x600", 10)) 381 return set_dvi_preset(preset_dvi_800X600, 800, 600); 382 else if (!strncmp(displaytype, "dvi1024x768", 11)) 383 return set_dvi_preset(preset_dvi_1024X768, 1024, 768); 384 else if (!strncmp(displaytype, "dvi1152x864", 11)) 385 return set_dvi_preset(preset_dvi_1152X864, 1152, 864); 386 else if (!strncmp(displaytype, "dvi1280x960", 11)) 387 return set_dvi_preset(preset_dvi_1280X960, 1280, 960); 388 else if (!strncmp(displaytype, "dvi1280x1024", 12)) 389 return set_dvi_preset(preset_dvi_1280X1024, 1280, 1024); 390 else if (!strncmp(displaytype, "dataimage480x800", 16)) 391 return set_dataimage_preset(preset_dataimage_480X800, 480, 800); 392 393 return NONE; 394 } 395 396 void lcd_ctrl_init(void *lcdbase) 397 { 398 struct prcm *prcm = (struct prcm *)PRCM_BASE; 399 char *custom_lcd; 400 char *displaytype = env_get("displaytype"); 401 402 if (displaytype == NULL) 403 return; 404 405 lcd_def = env_parse_displaytype(displaytype); 406 /* If we did not recognize the preset, check if it's an env variable */ 407 if (lcd_def == NONE) { 408 custom_lcd = env_get(displaytype); 409 if (custom_lcd == NULL || parse_customlcd(custom_lcd) < 0) 410 return; 411 } 412 413 panel_cfg.frame_buffer = lcdbase; 414 omap3_dss_panel_config(&panel_cfg); 415 /* 416 * Pixel clock is defined with many divisions and only few 417 * multiplications of the system clock. Since DSS FCLK divisor is set 418 * to 16 by default, we need to set it to a smaller value, like 3 419 * (chosen via trial and error). 420 */ 421 clrsetbits_le32(&prcm->clksel_dss, 0xF, 3); 422 } 423 424 #ifdef CONFIG_SCF0403_LCD 425 static void scf0403_enable(void) 426 { 427 gpio_direction_output(58, 1); 428 scf0403_init(157); 429 } 430 #else 431 static inline void scf0403_enable(void) {} 432 #endif 433 434 void lcd_enable(void) 435 { 436 switch (lcd_def) { 437 case NONE: 438 return; 439 case DVI: 440 case DVI_CUSTOM: 441 gpio_direction_output(54, 0); /* Turn on DVI */ 442 break; 443 case DATA_IMAGE: 444 scf0403_enable(); 445 break; 446 } 447 448 omap3_dss_enable(); 449 } 450 451 void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue) {} 452
