git.sur5r.net Git - u-boot/blob - board/compulab/common/omap3_display.c

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