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
  68 static void draw_logo(void)
  69 {
  70         int x, y;
  71         ulong addr;
  72
  73         if (panel_width >= panel_info.logo_width) {
  74                 x = ((panel_width - panel_info.logo_width) >> 1);
  75         } else {
  76                 x = 0;
  77                 printf("Warning: image width is bigger than display width\n");
  78         }
  79
  80         if (panel_height >= panel_info.logo_height) {
  81                 y = ((panel_height - panel_info.logo_height) >> 1) - 4;
  82         } else {
  83                 y = 0;
  84                 printf("Warning: image height is bigger than display height\n");
  85         }
  86
  87         addr = panel_info.logo_addr;
  88         bmp_display(addr, x, y);
  89 }
  90
  91 static void lcd_panel_on(vidinfo_t *vid)
  92 {
  93         udelay(vid->init_delay);
  94
  95         if (vid->backlight_reset)
  96                 vid->backlight_reset();
  97
  98         if (vid->cfg_gpio)
  99                 vid->cfg_gpio();
 100
 101         if (vid->lcd_power_on)
 102                 vid->lcd_power_on();
 103
 104         udelay(vid->power_on_delay);
 105
 106         if (vid->dp_enabled)
 107                 exynos_init_dp();
 108
 109         if (vid->reset_lcd) {
 110                 vid->reset_lcd();
 111                 udelay(vid->reset_delay);
 112         }
 113
 114         if (vid->backlight_on)
 115                 vid->backlight_on(1);
 116
 117         if (vid->cfg_ldo)
 118                 vid->cfg_ldo();
 119
 120         if (vid->enable_ldo)
 121                 vid->enable_ldo(1);
 122
 123         if (vid->mipi_enabled)
 124                 exynos_mipi_dsi_init();
 125 }
 126
 127 void lcd_ctrl_init(void *lcdbase)
 128 {
 129         set_system_display_ctrl();
 130         set_lcd_clk();
 131
 132         /* initialize parameters which is specific to panel. */
 133         init_panel_info(&panel_info);
 134
 135         panel_width = panel_info.vl_width;
 136         panel_height = panel_info.vl_height;
 137
 138         exynos_lcd_init_mem(lcdbase, &panel_info);
 139
 140         exynos_lcd_init(&panel_info);
 141 }
 142
 143 void lcd_enable(void)
 144 {
 145         if (panel_info.logo_on) {
 146                 memset(lcd_base, 0, panel_width * panel_height *
 147                                 (NBITS(panel_info.vl_bpix) >> 3));
 148                 draw_logo();
 149         }
 150
 151         lcd_panel_on(&panel_info);
 152 }
 153
 154 /* dummy function */
 155 void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue)
 156 {
 157         return;
 158 }