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  * SPDX-License-Identifier:     GPL-2.0+
   8  */
   9
  10 #include <config.h>
  11 #include <common.h>
  12 #include <lcd.h>
  13 #include <fdtdec.h>
  14 #include <libfdt.h>
  15 #include <asm/io.h>
  16 #include <asm/arch/cpu.h>
  17 #include <asm/arch/clock.h>
  18 #include <asm/arch/clk.h>
  19 #include <asm/arch/mipi_dsim.h>
  20 #include <asm/arch/dp_info.h>
  21 #include <asm/arch/system.h>
  22 #include <asm-generic/errno.h>
  23
  24 #include "exynos_fb.h"
  25
  26 DECLARE_GLOBAL_DATA_PTR;
  27
  28 static unsigned int panel_width, panel_height;
  29
  30 /*
  31  * board_init_f(arch/arm/lib/board.c) calls lcd_setmem() which needs
  32  * panel_info.vl_col, panel_info.vl_row and panel_info.vl_bpix to reserve
  33  * FB memory at a very early stage, i.e even before exynos_fimd_parse_dt()
  34  * is called. So, we are forced to statically assign it.
  35  */
  36 #ifdef CONFIG_OF_CONTROL
  37 vidinfo_t panel_info  = {
  38         .vl_col = LCD_XRES,
  39         .vl_row = LCD_YRES,
  40         .vl_bpix = LCD_COLOR16,
  41 };
  42 #endif
  43
  44 static void exynos_lcd_init_mem(void *lcdbase, vidinfo_t *vid)
  45 {
  46         unsigned long palette_size;
  47         unsigned int fb_size;
  48
  49         fb_size = vid->vl_row * vid->vl_col * (NBITS(vid->vl_bpix) >> 3);
  50
  51         palette_size = NBITS(vid->vl_bpix) == 8 ? 256 : 16;
  52
  53         exynos_fimd_lcd_init_mem((unsigned long)lcdbase,
  54                         (unsigned long)fb_size, palette_size);
  55 }
  56
  57 static void exynos_lcd_init(vidinfo_t *vid)
  58 {
  59         exynos_fimd_lcd_init(vid);
  60
  61         /* Enable flushing after LCD writes if requested */
  62         lcd_set_flush_dcache(1);
  63 }
  64
  65 #ifdef CONFIG_CMD_BMP
  66 static void draw_logo(void)
  67 {
  68         int x, y;
  69         ulong addr;
  70
  71         if (panel_width >= panel_info.logo_width) {
  72                 x = ((panel_width - panel_info.logo_width) >> 1);
  73         } else {
  74                 x = 0;
  75                 printf("Warning: image width is bigger than display width\n");
  76         }
  77
  78         if (panel_height >= panel_info.logo_height) {
  79                 y = ((panel_height - panel_info.logo_height) >> 1) - 4;
  80         } else {
  81                 y = 0;
  82                 printf("Warning: image height is bigger than display height\n");
  83         }
  84
  85         addr = panel_info.logo_addr;
  86         bmp_display(addr, x, y);
  87 }
  88 #endif
  89
  90 void __exynos_cfg_lcd_gpio(void)
  91 {
  92 }
  93 void exynos_cfg_lcd_gpio(void)
  94         __attribute__((weak, alias("__exynos_cfg_lcd_gpio")));
  95
  96 void __exynos_backlight_on(unsigned int onoff)
  97 {
  98 }
  99 void exynos_backlight_on(unsigned int onoff)
 100         __attribute__((weak, alias("__exynos_cfg_lcd_gpio")));
 101
 102 void __exynos_reset_lcd(void)
 103 {
 104 }
 105 void exynos_reset_lcd(void)
 106         __attribute__((weak, alias("__exynos_reset_lcd")));
 107
 108 void __exynos_lcd_power_on(void)
 109 {
 110 }
 111 void exynos_lcd_power_on(void)
 112         __attribute__((weak, alias("__exynos_lcd_power_on")));
 113
 114 void __exynos_cfg_ldo(void)
 115 {
 116 }
 117 void exynos_cfg_ldo(void)
 118         __attribute__((weak, alias("__exynos_cfg_ldo")));
 119
 120 void __exynos_enable_ldo(unsigned int onoff)
 121 {
 122 }
 123 void exynos_enable_ldo(unsigned int onoff)
 124         __attribute__((weak, alias("__exynos_enable_ldo")));
 125
 126 void __exynos_backlight_reset(void)
 127 {
 128 }
 129 void exynos_backlight_reset(void)
 130         __attribute__((weak, alias("__exynos_backlight_reset")));
 131
 132 static void lcd_panel_on(vidinfo_t *vid)
 133 {
 134         udelay(vid->init_delay);
 135
 136         exynos_backlight_reset();
 137
 138         exynos_cfg_lcd_gpio();
 139
 140         exynos_lcd_power_on();
 141
 142         udelay(vid->power_on_delay);
 143
 144         if (vid->dp_enabled)
 145                 exynos_init_dp();
 146
 147         exynos_reset_lcd();
 148
 149         udelay(vid->reset_delay);
 150
 151         exynos_backlight_on(1);
 152
 153         exynos_cfg_ldo();
 154
 155         exynos_enable_ldo(1);
 156
 157         if (vid->mipi_enabled)
 158                 exynos_mipi_dsi_init();
 159 }
 160
 161 #ifdef CONFIG_OF_CONTROL
 162 int exynos_fimd_parse_dt(const void *blob)
 163 {
 164         unsigned int node;
 165         node = fdtdec_next_compatible(blob, 0, COMPAT_SAMSUNG_EXYNOS_FIMD);
 166         if (node <= 0) {
 167                 debug("exynos_fb: Can't get device node for fimd\n");
 168                 return -ENODEV;
 169         }
 170
 171         panel_info.vl_col = fdtdec_get_int(blob, node, "samsung,vl-col", 0);
 172         if (panel_info.vl_col == 0) {
 173                 debug("Can't get XRES\n");
 174                 return -ENXIO;
 175         }
 176
 177         panel_info.vl_row = fdtdec_get_int(blob, node, "samsung,vl-row", 0);
 178         if (panel_info.vl_row == 0) {
 179                 debug("Can't get YRES\n");
 180                 return -ENXIO;
 181         }
 182
 183         panel_info.vl_width = fdtdec_get_int(blob, node,
 184                                                 "samsung,vl-width", 0);
 185
 186         panel_info.vl_height = fdtdec_get_int(blob, node,
 187                                                 "samsung,vl-height", 0);
 188
 189         panel_info.vl_freq = fdtdec_get_int(blob, node, "samsung,vl-freq", 0);
 190         if (panel_info.vl_freq == 0) {
 191                 debug("Can't get refresh rate\n");
 192                 return -ENXIO;
 193         }
 194
 195         if (fdtdec_get_bool(blob, node, "samsung,vl-clkp"))
 196                 panel_info.vl_clkp = CONFIG_SYS_LOW;
 197
 198         if (fdtdec_get_bool(blob, node, "samsung,vl-oep"))
 199                 panel_info.vl_oep = CONFIG_SYS_LOW;
 200
 201         if (fdtdec_get_bool(blob, node, "samsung,vl-hsp"))
 202                 panel_info.vl_hsp = CONFIG_SYS_LOW;
 203
 204         if (fdtdec_get_bool(blob, node, "samsung,vl-vsp"))
 205                 panel_info.vl_vsp = CONFIG_SYS_LOW;
 206
 207         if (fdtdec_get_bool(blob, node, "samsung,vl-dp"))
 208                 panel_info.vl_dp = CONFIG_SYS_LOW;
 209
 210         panel_info.vl_bpix = fdtdec_get_int(blob, node, "samsung,vl-bpix", 0);
 211         if (panel_info.vl_bpix == 0) {
 212                 debug("Can't get bits per pixel\n");
 213                 return -ENXIO;
 214         }
 215
 216         panel_info.vl_hspw = fdtdec_get_int(blob, node, "samsung,vl-hspw", 0);
 217         if (panel_info.vl_hspw == 0) {
 218                 debug("Can't get hsync width\n");
 219                 return -ENXIO;
 220         }
 221
 222         panel_info.vl_hfpd = fdtdec_get_int(blob, node, "samsung,vl-hfpd", 0);
 223         if (panel_info.vl_hfpd == 0) {
 224                 debug("Can't get right margin\n");
 225                 return -ENXIO;
 226         }
 227
 228         panel_info.vl_hbpd = (u_char)fdtdec_get_int(blob, node,
 229                                                         "samsung,vl-hbpd", 0);
 230         if (panel_info.vl_hbpd == 0) {
 231                 debug("Can't get left margin\n");
 232                 return -ENXIO;
 233         }
 234
 235         panel_info.vl_vspw = (u_char)fdtdec_get_int(blob, node,
 236                                                         "samsung,vl-vspw", 0);
 237         if (panel_info.vl_vspw == 0) {
 238                 debug("Can't get vsync width\n");
 239                 return -ENXIO;
 240         }
 241
 242         panel_info.vl_vfpd = fdtdec_get_int(blob, node,
 243                                                         "samsung,vl-vfpd", 0);
 244         if (panel_info.vl_vfpd == 0) {
 245                 debug("Can't get lower margin\n");
 246                 return -ENXIO;
 247         }
 248
 249         panel_info.vl_vbpd = fdtdec_get_int(blob, node, "samsung,vl-vbpd", 0);
 250         if (panel_info.vl_vbpd == 0) {
 251                 debug("Can't get upper margin\n");
 252                 return -ENXIO;
 253         }
 254
 255         panel_info.vl_cmd_allow_len = fdtdec_get_int(blob, node,
 256                                                 "samsung,vl-cmd-allow-len", 0);
 257
 258         panel_info.win_id = fdtdec_get_int(blob, node, "samsung,winid", 0);
 259         panel_info.init_delay = fdtdec_get_int(blob, node,
 260                                                 "samsung,init-delay", 0);
 261         panel_info.power_on_delay = fdtdec_get_int(blob, node,
 262                                                 "samsung,power-on-delay", 0);
 263         panel_info.reset_delay = fdtdec_get_int(blob, node,
 264                                                 "samsung,reset-delay", 0);
 265         panel_info.interface_mode = fdtdec_get_int(blob, node,
 266                                                 "samsung,interface-mode", 0);
 267         panel_info.mipi_enabled = fdtdec_get_int(blob, node,
 268                                                 "samsung,mipi-enabled", 0);
 269         panel_info.dp_enabled = fdtdec_get_int(blob, node,
 270                                                 "samsung,dp-enabled", 0);
 271         panel_info.cs_setup = fdtdec_get_int(blob, node,
 272                                                 "samsung,cs-setup", 0);
 273         panel_info.wr_setup = fdtdec_get_int(blob, node,
 274                                                 "samsung,wr-setup", 0);
 275         panel_info.wr_act = fdtdec_get_int(blob, node, "samsung,wr-act", 0);
 276         panel_info.wr_hold = fdtdec_get_int(blob, node, "samsung,wr-hold", 0);
 277
 278         panel_info.logo_on = fdtdec_get_int(blob, node, "samsung,logo-on", 0);
 279         if (panel_info.logo_on) {
 280                 panel_info.logo_width = fdtdec_get_int(blob, node,
 281                                                 "samsung,logo-width", 0);
 282                 panel_info.logo_height = fdtdec_get_int(blob, node,
 283                                                 "samsung,logo-height", 0);
 284                 panel_info.logo_addr = fdtdec_get_int(blob, node,
 285                                                 "samsung,logo-addr", 0);
 286         }
 287
 288         panel_info.rgb_mode = fdtdec_get_int(blob, node,
 289                                                 "samsung,rgb-mode", 0);
 290         panel_info.pclk_name = fdtdec_get_int(blob, node,
 291                                                 "samsung,pclk-name", 0);
 292         panel_info.sclk_div = fdtdec_get_int(blob, node,
 293                                                 "samsung,sclk-div", 0);
 294         panel_info.dual_lcd_enabled = fdtdec_get_int(blob, node,
 295                                                 "samsung,dual-lcd-enabled", 0);
 296
 297         return 0;
 298 }
 299 #endif
 300
 301 void lcd_ctrl_init(void *lcdbase)
 302 {
 303         set_system_display_ctrl();
 304         set_lcd_clk();
 305
 306 #ifdef CONFIG_OF_CONTROL
 307         if (exynos_fimd_parse_dt(gd->fdt_blob))
 308                 debug("Can't get proper panel info\n");
 309 #else
 310         /* initialize parameters which is specific to panel. */
 311         init_panel_info(&panel_info);
 312 #endif
 313         panel_width = panel_info.vl_width;
 314         panel_height = panel_info.vl_height;
 315
 316         exynos_lcd_init_mem(lcdbase, &panel_info);
 317
 318         exynos_lcd_init(&panel_info);
 319 }
 320
 321 void lcd_enable(void)
 322 {
 323         if (panel_info.logo_on) {
 324                 memset((void *) gd->fb_base, 0, panel_width * panel_height *
 325                                 (NBITS(panel_info.vl_bpix) >> 3));
 326 #ifdef CONFIG_CMD_BMP
 327                 draw_logo();
 328 #endif
 329         }
 330
 331         lcd_panel_on(&panel_info);
 332 }
 333
 334 /* dummy function */
 335 void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue)
 336 {
 337         return;
 338 }