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 <asm/io.h>
  27 #include <asm/arch/cpu.h>
  28 #include <asm/arch/clock.h>
  29 #include <asm/arch/clk.h>
  30 #include <asm/arch/mipi_dsim.h>
  31 #include <asm/arch/dp_info.h>
  32 #include <asm/arch/system.h>
  33
  34 #include "exynos_fb.h"
  35
  36 int lcd_line_length;
  37 int lcd_color_fg;
  38 int lcd_color_bg;
  39
  40 void *lcd_base;
  41 void *lcd_console_address;
  42
  43 short console_col;
  44 short console_row;
  45
  46 static unsigned int panel_width, panel_height;
  47
  48 static void exynos_lcd_init_mem(void *lcdbase, vidinfo_t *vid)
  49 {
  50         unsigned long palette_size;
  51         unsigned int fb_size;
  52
  53         fb_size = vid->vl_row * vid->vl_col * (NBITS(vid->vl_bpix) >> 3);
  54
  55         lcd_base = lcdbase;
  56
  57         palette_size = NBITS(vid->vl_bpix) == 8 ? 256 : 16;
  58
  59         exynos_fimd_lcd_init_mem((unsigned long)lcd_base,
  60                         (unsigned long)fb_size, palette_size);
  61 }
  62
  63 static void exynos_lcd_init(vidinfo_t *vid)
  64 {
  65         exynos_fimd_lcd_init(vid);
  66
  67         /* Enable flushing after LCD writes if requested */
  68         lcd_set_flush_dcache(1);
  69 }
  70
  71 #ifdef CONFIG_CMD_BMP
  72 static void draw_logo(void)
  73 {
  74         int x, y;
  75         ulong addr;
  76
  77         if (panel_width >= panel_info.logo_width) {
  78                 x = ((panel_width - panel_info.logo_width) >> 1);
  79         } else {
  80                 x = 0;
  81                 printf("Warning: image width is bigger than display width\n");
  82         }
  83
  84         if (panel_height >= panel_info.logo_height) {
  85                 y = ((panel_height - panel_info.logo_height) >> 1) - 4;
  86         } else {
  87                 y = 0;
  88                 printf("Warning: image height is bigger than display height\n");
  89         }
  90
  91         addr = panel_info.logo_addr;
  92         bmp_display(addr, x, y);
  93 }
  94 #endif
  95
  96 void __exynos_cfg_lcd_gpio(void)
  97 {
  98 }
  99 void exynos_cfg_lcd_gpio(void)
 100         __attribute__((weak, alias("__exynos_cfg_lcd_gpio")));
 101
 102 void __exynos_backlight_on(unsigned int onoff)
 103 {
 104 }
 105 void exynos_backlight_on(unsigned int onoff)
 106         __attribute__((weak, alias("__exynos_cfg_lcd_gpio")));
 107
 108 void __exynos_reset_lcd(void)
 109 {
 110 }
 111 void exynos_reset_lcd(void)
 112         __attribute__((weak, alias("__exynos_reset_lcd")));
 113
 114 void __exynos_lcd_power_on(void)
 115 {
 116 }
 117 void exynos_lcd_power_on(void)
 118         __attribute__((weak, alias("__exynos_lcd_power_on")));
 119
 120 void __exynos_cfg_ldo(void)
 121 {
 122 }
 123 void exynos_cfg_ldo(void)
 124         __attribute__((weak, alias("__exynos_cfg_ldo")));
 125
 126 void __exynos_enable_ldo(unsigned int onoff)
 127 {
 128 }
 129 void exynos_enable_ldo(unsigned int onoff)
 130         __attribute__((weak, alias("__exynos_enable_ldo")));
 131
 132 void __exynos_backlight_reset(void)
 133 {
 134 }
 135 void exynos_backlight_reset(void)
 136         __attribute__((weak, alias("__exynos_backlight_reset")));
 137
 138 static void lcd_panel_on(vidinfo_t *vid)
 139 {
 140         udelay(vid->init_delay);
 141
 142         exynos_backlight_reset();
 143
 144         exynos_cfg_lcd_gpio();
 145
 146         exynos_lcd_power_on();
 147
 148         udelay(vid->power_on_delay);
 149
 150         if (vid->dp_enabled)
 151                 exynos_init_dp();
 152
 153         exynos_reset_lcd();
 154
 155         udelay(vid->reset_delay);
 156
 157         exynos_backlight_on(1);
 158
 159         exynos_cfg_ldo();
 160
 161         exynos_enable_ldo(1);
 162
 163         if (vid->mipi_enabled)
 164                 exynos_mipi_dsi_init();
 165 }
 166
 167 void lcd_ctrl_init(void *lcdbase)
 168 {
 169         set_system_display_ctrl();
 170         set_lcd_clk();
 171
 172         /* initialize parameters which is specific to panel. */
 173         init_panel_info(&panel_info);
 174
 175         panel_width = panel_info.vl_width;
 176         panel_height = panel_info.vl_height;
 177
 178         exynos_lcd_init_mem(lcdbase, &panel_info);
 179
 180         exynos_lcd_init(&panel_info);
 181 }
 182
 183 void lcd_enable(void)
 184 {
 185         if (panel_info.logo_on) {
 186                 memset(lcd_base, 0, panel_width * panel_height *
 187                                 (NBITS(panel_info.vl_bpix) >> 3));
 188 #ifdef CONFIG_CMD_BMP
 189                 draw_logo();
 190 #endif
 191         }
 192
 193         lcd_panel_on(&panel_info);
 194 }
 195
 196 /* dummy function */
 197 void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue)
 198 {
 199         return;
 200 }