drivers/video/exynos_fb.c

   1 /*
   2  * Copyright (C) 2012 Samsung Electronics
   3  *
   4  * Author: InKi Dae <inki.dae@samsung.com>
   5  * Author: Donghwa Lee <dh09.lee@samsung.com>
   6  *
   7  * This program is free software; you can redistribute it and/or
   8  * modify it under the terms of the GNU General Public License as
   9  * published by the Free Software Foundation; either version 2 of
  10  * the License, or (at your option) any later version.
  11  *
  12  * This program is distributed in the hope that it will be useful,
  13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  20  * MA 02111-1307 USA
  21  */
  22
  23 #include <config.h>
  24 #include <common.h>
  25 #include <lcd.h>
  26 #include <fdtdec.h>
  27 #include <libfdt.h>
  28 #include <asm/io.h>
  29 #include <asm/arch/cpu.h>
  30 #include <asm/arch/clock.h>
  31 #include <asm/arch/clk.h>
  32 #include <asm/arch/mipi_dsim.h>
  33 #include <asm/arch/dp_info.h>
  34 #include <asm/arch/system.h>
  35 #include <asm-generic/errno.h>
  36
  37 #include "exynos_fb.h"
  38
  39 DECLARE_GLOBAL_DATA_PTR;
  40
  41 static unsigned int panel_width, panel_height;
  42
  43 /*
  44  * board_init_f(arch/arm/lib/board.c) calls lcd_setmem() which needs
  45  * panel_info.vl_col, panel_info.vl_row and panel_info.vl_bpix to reserve
  46  * FB memory at a very early stage, i.e even before exynos_fimd_parse_dt()
  47  * is called. So, we are forced to statically assign it.
  48  */
  49 #ifdef CONFIG_OF_CONTROL
  50 vidinfo_t panel_info  = {
  51         .vl_col = LCD_XRES,
  52         .vl_row = LCD_YRES,
  53         .vl_bpix = LCD_COLOR16,
  54 };
  55 #endif
  56
  57 static void exynos_lcd_init_mem(void *lcdbase, vidinfo_t *vid)
  58 {
  59         unsigned long palette_size;
  60         unsigned int fb_size;
  61
  62         fb_size = vid->vl_row * vid->vl_col * (NBITS(vid->vl_bpix) >> 3);
  63
  64         palette_size = NBITS(vid->vl_bpix) == 8 ? 256 : 16;
  65
  66         exynos_fimd_lcd_init_mem((unsigned long)lcdbase,
  67                         (unsigned long)fb_size, palette_size);
  68 }
  69
  70 static void exynos_lcd_init(vidinfo_t *vid)
  71 {
  72         exynos_fimd_lcd_init(vid);
  73
  74         /* Enable flushing after LCD writes if requested */
  75         lcd_set_flush_dcache(1);
  76 }
  77
  78 #ifdef CONFIG_CMD_BMP
  79 static void draw_logo(void)
  80 {
  81         int x, y;
  82         ulong addr;
  83
  84         if (panel_width >= panel_info.logo_width) {
  85                 x = ((panel_width - panel_info.logo_width) >> 1);
  86         } else {
  87                 x = 0;
  88                 printf("Warning: image width is bigger than display width\n");
  89         }
  90
  91         if (panel_height >= panel_info.logo_height) {
  92                 y = ((panel_height - panel_info.logo_height) >> 1) - 4;
  93         } else {
  94                 y = 0;
  95                 printf("Warning: image height is bigger than display height\n");
  96         }
  97
  98         addr = panel_info.logo_addr;
  99         bmp_display(addr, x, y);
 100 }
 101 #endif
 102
 103 void __exynos_cfg_lcd_gpio(void)
 104 {
 105 }
 106 void exynos_cfg_lcd_gpio(void)
 107         __attribute__((weak, alias("__exynos_cfg_lcd_gpio")));
 108
 109 void __exynos_backlight_on(unsigned int onoff)
 110 {
 111 }
 112 void exynos_backlight_on(unsigned int onoff)
 113         __attribute__((weak, alias("__exynos_cfg_lcd_gpio")));
 114
 115 void __exynos_reset_lcd(void)
 116 {
 117 }
 118 void exynos_reset_lcd(void)
 119         __attribute__((weak, alias("__exynos_reset_lcd")));
 120
 121 void __exynos_lcd_power_on(void)
 122 {
 123 }
 124 void exynos_lcd_power_on(void)
 125         __attribute__((weak, alias("__exynos_lcd_power_on")));
 126
 127 void __exynos_cfg_ldo(void)
 128 {
 129 }
 130 void exynos_cfg_ldo(void)
 131         __attribute__((weak, alias("__exynos_cfg_ldo")));
 132
 133 void __exynos_enable_ldo(unsigned int onoff)
 134 {
 135 }
 136 void exynos_enable_ldo(unsigned int onoff)
 137         __attribute__((weak, alias("__exynos_enable_ldo")));
 138
 139 void __exynos_backlight_reset(void)
 140 {
 141 }
 142 void exynos_backlight_reset(void)
 143         __attribute__((weak, alias("__exynos_backlight_reset")));
 144
 145 static void lcd_panel_on(vidinfo_t *vid)
 146 {
 147         udelay(vid->init_delay);
 148
 149         exynos_backlight_reset();
 150
 151         exynos_cfg_lcd_gpio();
 152
 153         exynos_lcd_power_on();
 154
 155         udelay(vid->power_on_delay);
 156
 157         if (vid->dp_enabled)
 158                 exynos_init_dp();
 159
 160         exynos_reset_lcd();
 161
 162         udelay(vid->reset_delay);
 163
 164         exynos_backlight_on(1);
 165
 166         exynos_cfg_ldo();
 167
 168         exynos_enable_ldo(1);
 169
 170         if (vid->mipi_enabled)
 171                 exynos_mipi_dsi_init();
 172 }
 173
 174 #ifdef CONFIG_OF_CONTROL
 175 int exynos_fimd_parse_dt(const void *blob)
 176 {
 177         unsigned int node;
 178         node = fdtdec_next_compatible(blob, 0, COMPAT_SAMSUNG_EXYNOS_FIMD);
 179         if (node <= 0) {
 180                 debug("exynos_fb: Can't get device node for fimd\n");
 181                 return -ENODEV;
 182         }
 183
 184         panel_info.vl_col = fdtdec_get_int(blob, node, "samsung,vl-col", 0);
 185         if (panel_info.vl_col == 0) {
 186                 debug("Can't get XRES\n");
 187                 return -ENXIO;
 188         }
 189
 190         panel_info.vl_row = fdtdec_get_int(blob, node, "samsung,vl-row", 0);
 191         if (panel_info.vl_row == 0) {
 192                 debug("Can't get YRES\n");
 193                 return -ENXIO;
 194         }
 195
 196         panel_info.vl_width = fdtdec_get_int(blob, node,
 197                                                 "samsung,vl-width", 0);
 198
 199         panel_info.vl_height = fdtdec_get_int(blob, node,
 200                                                 "samsung,vl-height", 0);
 201
 202         panel_info.vl_freq = fdtdec_get_int(blob, node, "samsung,vl-freq", 0);
 203         if (panel_info.vl_freq == 0) {
 204                 debug("Can't get refresh rate\n");
 205                 return -ENXIO;
 206         }
 207
 208         if (fdtdec_get_bool(blob, node, "samsung,vl-clkp"))
 209                 panel_info.vl_clkp = CONFIG_SYS_LOW;
 210
 211         if (fdtdec_get_bool(blob, node, "samsung,vl-oep"))
 212                 panel_info.vl_oep = CONFIG_SYS_LOW;
 213
 214         if (fdtdec_get_bool(blob, node, "samsung,vl-hsp"))
 215                 panel_info.vl_hsp = CONFIG_SYS_LOW;
 216
 217         if (fdtdec_get_bool(blob, node, "samsung,vl-vsp"))
 218                 panel_info.vl_vsp = CONFIG_SYS_LOW;
 219
 220         if (fdtdec_get_bool(blob, node, "samsung,vl-dp"))
 221                 panel_info.vl_dp = CONFIG_SYS_LOW;
 222
 223         panel_info.vl_bpix = fdtdec_get_int(blob, node, "samsung,vl-bpix", 0);
 224         if (panel_info.vl_bpix == 0) {
 225                 debug("Can't get bits per pixel\n");
 226                 return -ENXIO;
 227         }
 228
 229         panel_info.vl_hspw = fdtdec_get_int(blob, node, "samsung,vl-hspw", 0);
 230         if (panel_info.vl_hspw == 0) {
 231                 debug("Can't get hsync width\n");
 232                 return -ENXIO;
 233         }
 234
 235         panel_info.vl_hfpd = fdtdec_get_int(blob, node, "samsung,vl-hfpd", 0);
 236         if (panel_info.vl_hfpd == 0) {
 237                 debug("Can't get right margin\n");
 238                 return -ENXIO;
 239         }
 240
 241         panel_info.vl_hbpd = (u_char)fdtdec_get_int(blob, node,
 242                                                         "samsung,vl-hbpd", 0);
 243         if (panel_info.vl_hbpd == 0) {
 244                 debug("Can't get left margin\n");
 245                 return -ENXIO;
 246         }
 247
 248         panel_info.vl_vspw = (u_char)fdtdec_get_int(blob, node,
 249                                                         "samsung,vl-vspw", 0);
 250         if (panel_info.vl_vspw == 0) {
 251                 debug("Can't get vsync width\n");
 252                 return -ENXIO;
 253         }
 254
 255         panel_info.vl_vfpd = fdtdec_get_int(blob, node,
 256                                                         "samsung,vl-vfpd", 0);
 257         if (panel_info.vl_vfpd == 0) {
 258                 debug("Can't get lower margin\n");
 259                 return -ENXIO;
 260         }
 261
 262         panel_info.vl_vbpd = fdtdec_get_int(blob, node, "samsung,vl-vbpd", 0);
 263         if (panel_info.vl_vbpd == 0) {
 264                 debug("Can't get upper margin\n");
 265                 return -ENXIO;
 266         }
 267
 268         panel_info.vl_cmd_allow_len = fdtdec_get_int(blob, node,
 269                                                 "samsung,vl-cmd-allow-len", 0);
 270
 271         panel_info.win_id = fdtdec_get_int(blob, node, "samsung,winid", 0);
 272         panel_info.init_delay = fdtdec_get_int(blob, node,
 273                                                 "samsung,init-delay", 0);
 274         panel_info.power_on_delay = fdtdec_get_int(blob, node,
 275                                                 "samsung,power-on-delay", 0);
 276         panel_info.reset_delay = fdtdec_get_int(blob, node,
 277                                                 "samsung,reset-delay", 0);
 278         panel_info.interface_mode = fdtdec_get_int(blob, node,
 279                                                 "samsung,interface-mode", 0);
 280         panel_info.mipi_enabled = fdtdec_get_int(blob, node,
 281                                                 "samsung,mipi-enabled", 0);
 282         panel_info.dp_enabled = fdtdec_get_int(blob, node,
 283                                                 "samsung,dp-enabled", 0);
 284         panel_info.cs_setup = fdtdec_get_int(blob, node,
 285                                                 "samsung,cs-setup", 0);
 286         panel_info.wr_setup = fdtdec_get_int(blob, node,
 287                                                 "samsung,wr-setup", 0);
 288         panel_info.wr_act = fdtdec_get_int(blob, node, "samsung,wr-act", 0);
 289         panel_info.wr_hold = fdtdec_get_int(blob, node, "samsung,wr-hold", 0);
 290
 291         panel_info.logo_on = fdtdec_get_int(blob, node, "samsung,logo-on", 0);
 292         if (panel_info.logo_on) {
 293                 panel_info.logo_width = fdtdec_get_int(blob, node,
 294                                                 "samsung,logo-width", 0);
 295                 panel_info.logo_height = fdtdec_get_int(blob, node,
 296                                                 "samsung,logo-height", 0);
 297                 panel_info.logo_addr = fdtdec_get_int(blob, node,
 298                                                 "samsung,logo-addr", 0);
 299         }
 300
 301         panel_info.rgb_mode = fdtdec_get_int(blob, node,
 302                                                 "samsung,rgb-mode", 0);
 303         panel_info.pclk_name = fdtdec_get_int(blob, node,
 304                                                 "samsung,pclk-name", 0);
 305         panel_info.sclk_div = fdtdec_get_int(blob, node,
 306                                                 "samsung,sclk-div", 0);
 307         panel_info.dual_lcd_enabled = fdtdec_get_int(blob, node,
 308                                                 "samsung,dual-lcd-enabled", 0);
 309
 310         return 0;
 311 }
 312 #endif
 313
 314 void lcd_ctrl_init(void *lcdbase)
 315 {
 316         set_system_display_ctrl();
 317         set_lcd_clk();
 318
 319 #ifdef CONFIG_OF_CONTROL
 320         if (exynos_fimd_parse_dt(gd->fdt_blob))
 321                 debug("Can't get proper panel info\n");
 322 #endif
 323         /* initialize parameters which is specific to panel. */
 324         init_panel_info(&panel_info);
 325
 326         panel_width = panel_info.vl_width;
 327         panel_height = panel_info.vl_height;
 328
 329         exynos_lcd_init_mem(lcdbase, &panel_info);
 330
 331         exynos_lcd_init(&panel_info);
 332 }
 333
 334 void lcd_enable(void)
 335 {
 336         if (panel_info.logo_on) {
 337                 memset((void *) gd->fb_base, 0, panel_width * panel_height *
 338                                 (NBITS(panel_info.vl_bpix) >> 3));
 339 #ifdef CONFIG_CMD_BMP
 340                 draw_logo();
 341 #endif
 342         }
 343
 344         lcd_panel_on(&panel_info);
 345 }
 346
 347 /* dummy function */
 348 void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue)
 349 {
 350         return;
 351 }