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 DECLARE_GLOBAL_DATA_PTR;
  37
  38 static unsigned int panel_width, panel_height;
  39
  40 static void exynos_lcd_init_mem(void *lcdbase, vidinfo_t *vid)
  41 {
  42         unsigned long palette_size;
  43         unsigned int fb_size;
  44
  45         fb_size = vid->vl_row * vid->vl_col * (NBITS(vid->vl_bpix) >> 3);
  46
  47         palette_size = NBITS(vid->vl_bpix) == 8 ? 256 : 16;
  48
  49         exynos_fimd_lcd_init_mem((unsigned long)lcdbase,
  50                         (unsigned long)fb_size, palette_size);
  51 }
  52
  53 static void exynos_lcd_init(vidinfo_t *vid)
  54 {
  55         exynos_fimd_lcd_init(vid);
  56
  57         /* Enable flushing after LCD writes if requested */
  58         lcd_set_flush_dcache(1);
  59 }
  60
  61 #ifdef CONFIG_CMD_BMP
  62 static void draw_logo(void)
  63 {
  64         int x, y;
  65         ulong addr;
  66
  67         if (panel_width >= panel_info.logo_width) {
  68                 x = ((panel_width - panel_info.logo_width) >> 1);
  69         } else {
  70                 x = 0;
  71                 printf("Warning: image width is bigger than display width\n");
  72         }
  73
  74         if (panel_height >= panel_info.logo_height) {
  75                 y = ((panel_height - panel_info.logo_height) >> 1) - 4;
  76         } else {
  77                 y = 0;
  78                 printf("Warning: image height is bigger than display height\n");
  79         }
  80
  81         addr = panel_info.logo_addr;
  82         bmp_display(addr, x, y);
  83 }
  84 #endif
  85
  86 static void lcd_panel_on(vidinfo_t *vid)
  87 {
  88         udelay(vid->init_delay);
  89
  90         if (vid->backlight_reset)
  91                 vid->backlight_reset();
  92
  93         if (vid->cfg_gpio)
  94                 vid->cfg_gpio();
  95
  96         if (vid->lcd_power_on)
  97                 vid->lcd_power_on();
  98
  99         udelay(vid->power_on_delay);
 100
 101         if (vid->dp_enabled)
 102                 exynos_init_dp();
 103
 104         if (vid->reset_lcd) {
 105                 vid->reset_lcd();
 106                 udelay(vid->reset_delay);
 107         }
 108
 109         if (vid->backlight_on)
 110                 vid->backlight_on(1);
 111
 112         if (vid->cfg_ldo)
 113                 vid->cfg_ldo();
 114
 115         if (vid->enable_ldo)
 116                 vid->enable_ldo(1);
 117
 118         if (vid->mipi_enabled)
 119                 exynos_mipi_dsi_init();
 120 }
 121
 122 void lcd_ctrl_init(void *lcdbase)
 123 {
 124         set_system_display_ctrl();
 125         set_lcd_clk();
 126
 127         /* initialize parameters which is specific to panel. */
 128         init_panel_info(&panel_info);
 129
 130         panel_width = panel_info.vl_width;
 131         panel_height = panel_info.vl_height;
 132
 133         exynos_lcd_init_mem(lcdbase, &panel_info);
 134
 135         exynos_lcd_init(&panel_info);
 136 }
 137
 138 void lcd_enable(void)
 139 {
 140         if (panel_info.logo_on) {
 141                 memset((void *) gd->fb_base, 0, panel_width * panel_height *
 142                                 (NBITS(panel_info.vl_bpix) >> 3));
 143 #ifdef CONFIG_CMD_BMP
 144                 draw_logo();
 145 #endif
 146         }
 147
 148         lcd_panel_on(&panel_info);
 149 }
 150
 151 /* dummy function */
 152 void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue)
 153 {
 154         return;
 155 }