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/system.h>
  32
  33 #include "exynos_fb.h"
  34
  35 int lcd_line_length;
  36 int lcd_color_fg;
  37 int lcd_color_bg;
  38
  39 void *lcd_base;
  40 void *lcd_console_address;
  41
  42 short console_col;
  43 short console_row;
  44
  45 static unsigned int panel_width, panel_height;
  46
  47 /* LCD Panel data */
  48 vidinfo_t panel_info;
  49
  50 static void exynos_lcd_init_mem(void *lcdbase, vidinfo_t *vid)
  51 {
  52         unsigned long palette_size;
  53         unsigned int fb_size;
  54
  55         fb_size = vid->vl_row * vid->vl_col * (NBITS(vid->vl_bpix) >> 3);
  56
  57         lcd_base = lcdbase;
  58
  59         palette_size = NBITS(vid->vl_bpix) == 8 ? 256 : 16;
  60
  61         exynos_fimd_lcd_init_mem((unsigned long)lcd_base,
  62                         (unsigned long)fb_size, palette_size);
  63 }
  64
  65 static void exynos_lcd_init(vidinfo_t *vid)
  66 {
  67         exynos_fimd_lcd_init(vid);
  68 }
  69
  70 static void draw_logo(void)
  71 {
  72         int x, y;
  73         ulong addr;
  74
  75         x = ((panel_width - panel_info.logo_width) >> 1);
  76         y = ((panel_height - panel_info.logo_height) >> 1) - 4;
  77
  78         addr = panel_info.logo_addr;
  79         bmp_display(addr, x, y);
  80 }
  81
  82 static void lcd_panel_on(vidinfo_t *vid)
  83 {
  84         udelay(vid->init_delay);
  85
  86         if (vid->backlight_reset)
  87                 vid->backlight_reset();
  88
  89         if (vid->cfg_gpio)
  90                 vid->cfg_gpio();
  91
  92         if (vid->lcd_power_on)
  93                 vid->lcd_power_on();
  94
  95         udelay(vid->power_on_delay);
  96
  97         if (vid->reset_lcd) {
  98                 vid->reset_lcd();
  99                 udelay(vid->reset_delay);
 100         }
 101
 102         if (vid->backlight_on)
 103                 vid->backlight_on(1);
 104
 105         if (vid->cfg_ldo)
 106                 vid->cfg_ldo();
 107
 108         if (vid->enable_ldo)
 109                 vid->enable_ldo(1);
 110
 111         if (vid->mipi_enabled)
 112                 exynos_mipi_dsi_init();
 113 }
 114
 115 void lcd_ctrl_init(void *lcdbase)
 116 {
 117         set_system_display_ctrl();
 118         set_lcd_clk();
 119
 120         /* initialize parameters which is specific to panel. */
 121         init_panel_info(&panel_info);
 122
 123         panel_width = panel_info.vl_width;
 124         panel_height = panel_info.vl_height;
 125
 126         exynos_lcd_init_mem(lcdbase, &panel_info);
 127
 128         exynos_lcd_init(&panel_info);
 129 }
 130
 131 void lcd_enable(void)
 132 {
 133         if (panel_info.logo_on) {
 134                 memset(lcd_base, 0, panel_width * panel_height *
 135                                 (NBITS(panel_info.vl_bpix) >> 3));
 136
 137                 draw_logo();
 138         }
 139
 140         lcd_panel_on(&panel_info);
 141 }
 142
 143 /* dummy function */
 144 void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue)
 145 {
 146         return;
 147 }