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 #ifdef CONFIG_OF_CONTROL
  31 vidinfo_t panel_info  = {
  32         /*
  33          * Insert a value here so that we don't end up in the BSS
  34          * Reference: drivers/video/tegra.c
  35          */
  36         .vl_col = -1,
  37 };
  38 #endif
  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 __weak void exynos_cfg_lcd_gpio(void)
  62 {
  63 }
  64
  65 __weak void exynos_backlight_on(unsigned int onoff)
  66 {
  67 }
  68
  69 __weak void exynos_reset_lcd(void)
  70 {
  71 }
  72
  73 __weak void exynos_lcd_power_on(void)
  74 {
  75 }
  76
  77 __weak void exynos_cfg_ldo(void)
  78 {
  79 }
  80
  81 __weak void exynos_enable_ldo(unsigned int onoff)
  82 {
  83 }
  84
  85 __weak void exynos_backlight_reset(void)
  86 {
  87 }
  88
  89 __weak int exynos_lcd_misc_init(vidinfo_t *vid)
  90 {
  91         return 0;
  92 }
  93
  94 static void lcd_panel_on(vidinfo_t *vid)
  95 {
  96         udelay(vid->init_delay);
  97
  98         exynos_backlight_reset();
  99
 100         exynos_cfg_lcd_gpio();
 101
 102         exynos_lcd_power_on();
 103
 104         udelay(vid->power_on_delay);
 105
 106         if (vid->dp_enabled)
 107                 exynos_init_dp();
 108
 109         exynos_reset_lcd();
 110
 111         udelay(vid->reset_delay);
 112
 113         exynos_backlight_on(1);
 114
 115         exynos_cfg_ldo();
 116
 117         exynos_enable_ldo(1);
 118
 119         if (vid->mipi_enabled)
 120                 exynos_mipi_dsi_init();
 121 }
 122
 123 #ifdef CONFIG_OF_CONTROL
 124 int exynos_lcd_early_init(const void *blob)
 125 {
 126         unsigned int node;
 127         node = fdtdec_next_compatible(blob, 0, COMPAT_SAMSUNG_EXYNOS_FIMD);
 128         if (node <= 0) {
 129                 debug("exynos_fb: Can't get device node for fimd\n");
 130                 return -ENODEV;
 131         }
 132
 133         panel_info.vl_col = fdtdec_get_int(blob, node, "samsung,vl-col", 0);
 134         if (panel_info.vl_col == 0) {
 135                 debug("Can't get XRES\n");
 136                 return -ENXIO;
 137         }
 138
 139         panel_info.vl_row = fdtdec_get_int(blob, node, "samsung,vl-row", 0);
 140         if (panel_info.vl_row == 0) {
 141                 debug("Can't get YRES\n");
 142                 return -ENXIO;
 143         }
 144
 145         panel_info.vl_width = fdtdec_get_int(blob, node,
 146                                                 "samsung,vl-width", 0);
 147
 148         panel_info.vl_height = fdtdec_get_int(blob, node,
 149                                                 "samsung,vl-height", 0);
 150
 151         panel_info.vl_freq = fdtdec_get_int(blob, node, "samsung,vl-freq", 0);
 152         if (panel_info.vl_freq == 0) {
 153                 debug("Can't get refresh rate\n");
 154                 return -ENXIO;
 155         }
 156
 157         if (fdtdec_get_bool(blob, node, "samsung,vl-clkp"))
 158                 panel_info.vl_clkp = CONFIG_SYS_LOW;
 159
 160         if (fdtdec_get_bool(blob, node, "samsung,vl-oep"))
 161                 panel_info.vl_oep = CONFIG_SYS_LOW;
 162
 163         if (fdtdec_get_bool(blob, node, "samsung,vl-hsp"))
 164                 panel_info.vl_hsp = CONFIG_SYS_LOW;
 165
 166         if (fdtdec_get_bool(blob, node, "samsung,vl-vsp"))
 167                 panel_info.vl_vsp = CONFIG_SYS_LOW;
 168
 169         if (fdtdec_get_bool(blob, node, "samsung,vl-dp"))
 170                 panel_info.vl_dp = CONFIG_SYS_LOW;
 171
 172         panel_info.vl_bpix = fdtdec_get_int(blob, node, "samsung,vl-bpix", 0);
 173         if (panel_info.vl_bpix == 0) {
 174                 debug("Can't get bits per pixel\n");
 175                 return -ENXIO;
 176         }
 177
 178         panel_info.vl_hspw = fdtdec_get_int(blob, node, "samsung,vl-hspw", 0);
 179         if (panel_info.vl_hspw == 0) {
 180                 debug("Can't get hsync width\n");
 181                 return -ENXIO;
 182         }
 183
 184         panel_info.vl_hfpd = fdtdec_get_int(blob, node, "samsung,vl-hfpd", 0);
 185         if (panel_info.vl_hfpd == 0) {
 186                 debug("Can't get right margin\n");
 187                 return -ENXIO;
 188         }
 189
 190         panel_info.vl_hbpd = (u_char)fdtdec_get_int(blob, node,
 191                                                         "samsung,vl-hbpd", 0);
 192         if (panel_info.vl_hbpd == 0) {
 193                 debug("Can't get left margin\n");
 194                 return -ENXIO;
 195         }
 196
 197         panel_info.vl_vspw = (u_char)fdtdec_get_int(blob, node,
 198                                                         "samsung,vl-vspw", 0);
 199         if (panel_info.vl_vspw == 0) {
 200                 debug("Can't get vsync width\n");
 201                 return -ENXIO;
 202         }
 203
 204         panel_info.vl_vfpd = fdtdec_get_int(blob, node,
 205                                                         "samsung,vl-vfpd", 0);
 206         if (panel_info.vl_vfpd == 0) {
 207                 debug("Can't get lower margin\n");
 208                 return -ENXIO;
 209         }
 210
 211         panel_info.vl_vbpd = fdtdec_get_int(blob, node, "samsung,vl-vbpd", 0);
 212         if (panel_info.vl_vbpd == 0) {
 213                 debug("Can't get upper margin\n");
 214                 return -ENXIO;
 215         }
 216
 217         panel_info.vl_cmd_allow_len = fdtdec_get_int(blob, node,
 218                                                 "samsung,vl-cmd-allow-len", 0);
 219
 220         panel_info.win_id = fdtdec_get_int(blob, node, "samsung,winid", 0);
 221         panel_info.init_delay = fdtdec_get_int(blob, node,
 222                                                 "samsung,init-delay", 0);
 223         panel_info.power_on_delay = fdtdec_get_int(blob, node,
 224                                                 "samsung,power-on-delay", 0);
 225         panel_info.reset_delay = fdtdec_get_int(blob, node,
 226                                                 "samsung,reset-delay", 0);
 227         panel_info.interface_mode = fdtdec_get_int(blob, node,
 228                                                 "samsung,interface-mode", 0);
 229         panel_info.mipi_enabled = fdtdec_get_int(blob, node,
 230                                                 "samsung,mipi-enabled", 0);
 231         panel_info.dp_enabled = fdtdec_get_int(blob, node,
 232                                                 "samsung,dp-enabled", 0);
 233         panel_info.cs_setup = fdtdec_get_int(blob, node,
 234                                                 "samsung,cs-setup", 0);
 235         panel_info.wr_setup = fdtdec_get_int(blob, node,
 236                                                 "samsung,wr-setup", 0);
 237         panel_info.wr_act = fdtdec_get_int(blob, node, "samsung,wr-act", 0);
 238         panel_info.wr_hold = fdtdec_get_int(blob, node, "samsung,wr-hold", 0);
 239
 240         panel_info.logo_on = fdtdec_get_int(blob, node, "samsung,logo-on", 0);
 241         if (panel_info.logo_on) {
 242                 panel_info.logo_width = fdtdec_get_int(blob, node,
 243                                                 "samsung,logo-width", 0);
 244                 panel_info.logo_height = fdtdec_get_int(blob, node,
 245                                                 "samsung,logo-height", 0);
 246                 panel_info.logo_addr = fdtdec_get_int(blob, node,
 247                                                 "samsung,logo-addr", 0);
 248         }
 249
 250         panel_info.rgb_mode = fdtdec_get_int(blob, node,
 251                                                 "samsung,rgb-mode", 0);
 252         panel_info.pclk_name = fdtdec_get_int(blob, node,
 253                                                 "samsung,pclk-name", 0);
 254         panel_info.sclk_div = fdtdec_get_int(blob, node,
 255                                                 "samsung,sclk-div", 0);
 256         panel_info.dual_lcd_enabled = fdtdec_get_int(blob, node,
 257                                                 "samsung,dual-lcd-enabled", 0);
 258
 259         return 0;
 260 }
 261 #endif
 262
 263 void lcd_ctrl_init(void *lcdbase)
 264 {
 265         set_system_display_ctrl();
 266         set_lcd_clk();
 267
 268 #ifdef CONFIG_OF_CONTROL
 269 #ifdef CONFIG_EXYNOS_MIPI_DSIM
 270         exynos_init_dsim_platform_data(&panel_info);
 271 #endif
 272         exynos_lcd_misc_init(&panel_info);
 273 #else
 274         /* initialize parameters which is specific to panel. */
 275         init_panel_info(&panel_info);
 276 #endif
 277
 278         panel_width = panel_info.vl_width;
 279         panel_height = panel_info.vl_height;
 280
 281         exynos_lcd_init_mem(lcdbase, &panel_info);
 282
 283         exynos_lcd_init(&panel_info);
 284 }
 285
 286 void lcd_enable(void)
 287 {
 288         if (panel_info.logo_on) {
 289                 memset((void *) gd->fb_base, 0, panel_width * panel_height *
 290                                 (NBITS(panel_info.vl_bpix) >> 3));
 291         }
 292
 293         lcd_panel_on(&panel_info);
 294 }
 295
 296 /* dummy function */
 297 void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue)
 298 {
 299         return;
 300 }