drivers/video/exynos/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/gpio.h>
  23 #include <asm-generic/errno.h>
  24
  25 #include "exynos_fb.h"
  26
  27 DECLARE_GLOBAL_DATA_PTR;
  28
  29 static unsigned int panel_width, panel_height;
  30
  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
  39 ushort *configuration_get_cmap(void)
  40 {
  41 #if defined(CONFIG_LCD_LOGO)
  42         return bmp_logo_palette;
  43 #else
  44         return NULL;
  45 #endif
  46 }
  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         palette_size = NBITS(vid->vl_bpix) == 8 ? 256 : 16;
  56
  57         exynos_fimd_lcd_init_mem((unsigned long)lcdbase,
  58                         (unsigned long)fb_size, palette_size);
  59 }
  60
  61 static void exynos_lcd_init(vidinfo_t *vid)
  62 {
  63         exynos_fimd_lcd_init(vid);
  64
  65         /* Enable flushing after LCD writes if requested */
  66         lcd_set_flush_dcache(1);
  67 }
  68
  69 __weak void exynos_cfg_lcd_gpio(void)
  70 {
  71 }
  72
  73 __weak void exynos_backlight_on(unsigned int onoff)
  74 {
  75 }
  76
  77 __weak void exynos_reset_lcd(void)
  78 {
  79 }
  80
  81 __weak void exynos_lcd_power_on(void)
  82 {
  83 }
  84
  85 __weak void exynos_cfg_ldo(void)
  86 {
  87 }
  88
  89 __weak void exynos_enable_ldo(unsigned int onoff)
  90 {
  91 }
  92
  93 __weak void exynos_backlight_reset(void)
  94 {
  95 }
  96
  97 __weak int exynos_lcd_misc_init(vidinfo_t *vid)
  98 {
  99         return 0;
 100 }
 101
 102 static void lcd_panel_on(vidinfo_t *vid)
 103 {
 104         struct gpio_desc pwm_out_gpio;
 105         struct gpio_desc bl_en_gpio;
 106         unsigned int node;
 107
 108         udelay(vid->init_delay);
 109
 110         exynos_backlight_reset();
 111
 112         exynos_cfg_lcd_gpio();
 113
 114         exynos_lcd_power_on();
 115
 116         udelay(vid->power_on_delay);
 117
 118         if (vid->dp_enabled)
 119                 exynos_init_dp();
 120
 121         exynos_reset_lcd();
 122
 123         udelay(vid->reset_delay);
 124
 125         exynos_backlight_on(1);
 126
 127         node = fdtdec_next_compatible(gd->fdt_blob, 0,
 128                                                 COMPAT_SAMSUNG_EXYNOS_FIMD);
 129         if (node <= 0) {
 130                 debug("FIMD: Can't get device node for FIMD\n");
 131                 return;
 132         }
 133         gpio_request_by_name_nodev(gd->fdt_blob, node, "samsung,pwm-out-gpio",
 134                                    0, &pwm_out_gpio,
 135                                    GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
 136
 137         gpio_request_by_name_nodev(gd->fdt_blob, node, "samsung,bl-en-gpio", 0,
 138                                    &bl_en_gpio,
 139                                    GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
 140
 141         exynos_cfg_ldo();
 142
 143         exynos_enable_ldo(1);
 144
 145         if (vid->mipi_enabled)
 146                 exynos_mipi_dsi_init();
 147 }
 148
 149 int exynos_lcd_early_init(const void *blob)
 150 {
 151         unsigned int node;
 152         node = fdtdec_next_compatible(blob, 0, COMPAT_SAMSUNG_EXYNOS_FIMD);
 153         if (node <= 0) {
 154                 debug("exynos_fb: Can't get device node for fimd\n");
 155                 return -ENODEV;
 156         }
 157
 158         panel_info.vl_col = fdtdec_get_int(blob, node, "samsung,vl-col", 0);
 159         if (panel_info.vl_col == 0) {
 160                 debug("Can't get XRES\n");
 161                 return -ENXIO;
 162         }
 163
 164         panel_info.vl_row = fdtdec_get_int(blob, node, "samsung,vl-row", 0);
 165         if (panel_info.vl_row == 0) {
 166                 debug("Can't get YRES\n");
 167                 return -ENXIO;
 168         }
 169
 170         panel_info.vl_width = fdtdec_get_int(blob, node,
 171                                                 "samsung,vl-width", 0);
 172
 173         panel_info.vl_height = fdtdec_get_int(blob, node,
 174                                                 "samsung,vl-height", 0);
 175
 176         panel_info.vl_freq = fdtdec_get_int(blob, node, "samsung,vl-freq", 0);
 177         if (panel_info.vl_freq == 0) {
 178                 debug("Can't get refresh rate\n");
 179                 return -ENXIO;
 180         }
 181
 182         if (fdtdec_get_bool(blob, node, "samsung,vl-clkp"))
 183                 panel_info.vl_clkp = CONFIG_SYS_LOW;
 184
 185         if (fdtdec_get_bool(blob, node, "samsung,vl-oep"))
 186                 panel_info.vl_oep = CONFIG_SYS_LOW;
 187
 188         if (fdtdec_get_bool(blob, node, "samsung,vl-hsp"))
 189                 panel_info.vl_hsp = CONFIG_SYS_LOW;
 190
 191         if (fdtdec_get_bool(blob, node, "samsung,vl-vsp"))
 192                 panel_info.vl_vsp = CONFIG_SYS_LOW;
 193
 194         if (fdtdec_get_bool(blob, node, "samsung,vl-dp"))
 195                 panel_info.vl_dp = CONFIG_SYS_LOW;
 196
 197         panel_info.vl_bpix = fdtdec_get_int(blob, node, "samsung,vl-bpix", 0);
 198         if (panel_info.vl_bpix == 0) {
 199                 debug("Can't get bits per pixel\n");
 200                 return -ENXIO;
 201         }
 202
 203         panel_info.vl_hspw = fdtdec_get_int(blob, node, "samsung,vl-hspw", 0);
 204         if (panel_info.vl_hspw == 0) {
 205                 debug("Can't get hsync width\n");
 206                 return -ENXIO;
 207         }
 208
 209         panel_info.vl_hfpd = fdtdec_get_int(blob, node, "samsung,vl-hfpd", 0);
 210         if (panel_info.vl_hfpd == 0) {
 211                 debug("Can't get right margin\n");
 212                 return -ENXIO;
 213         }
 214
 215         panel_info.vl_hbpd = (u_char)fdtdec_get_int(blob, node,
 216                                                         "samsung,vl-hbpd", 0);
 217         if (panel_info.vl_hbpd == 0) {
 218                 debug("Can't get left margin\n");
 219                 return -ENXIO;
 220         }
 221
 222         panel_info.vl_vspw = (u_char)fdtdec_get_int(blob, node,
 223                                                         "samsung,vl-vspw", 0);
 224         if (panel_info.vl_vspw == 0) {
 225                 debug("Can't get vsync width\n");
 226                 return -ENXIO;
 227         }
 228
 229         panel_info.vl_vfpd = fdtdec_get_int(blob, node,
 230                                                         "samsung,vl-vfpd", 0);
 231         if (panel_info.vl_vfpd == 0) {
 232                 debug("Can't get lower margin\n");
 233                 return -ENXIO;
 234         }
 235
 236         panel_info.vl_vbpd = fdtdec_get_int(blob, node, "samsung,vl-vbpd", 0);
 237         if (panel_info.vl_vbpd == 0) {
 238                 debug("Can't get upper margin\n");
 239                 return -ENXIO;
 240         }
 241
 242         panel_info.vl_cmd_allow_len = fdtdec_get_int(blob, node,
 243                                                 "samsung,vl-cmd-allow-len", 0);
 244
 245         panel_info.win_id = fdtdec_get_int(blob, node, "samsung,winid", 0);
 246         panel_info.init_delay = fdtdec_get_int(blob, node,
 247                                                 "samsung,init-delay", 0);
 248         panel_info.power_on_delay = fdtdec_get_int(blob, node,
 249                                                 "samsung,power-on-delay", 0);
 250         panel_info.reset_delay = fdtdec_get_int(blob, node,
 251                                                 "samsung,reset-delay", 0);
 252         panel_info.interface_mode = fdtdec_get_int(blob, node,
 253                                                 "samsung,interface-mode", 0);
 254         panel_info.mipi_enabled = fdtdec_get_int(blob, node,
 255                                                 "samsung,mipi-enabled", 0);
 256         panel_info.dp_enabled = fdtdec_get_int(blob, node,
 257                                                 "samsung,dp-enabled", 0);
 258         panel_info.cs_setup = fdtdec_get_int(blob, node,
 259                                                 "samsung,cs-setup", 0);
 260         panel_info.wr_setup = fdtdec_get_int(blob, node,
 261                                                 "samsung,wr-setup", 0);
 262         panel_info.wr_act = fdtdec_get_int(blob, node, "samsung,wr-act", 0);
 263         panel_info.wr_hold = fdtdec_get_int(blob, node, "samsung,wr-hold", 0);
 264
 265         panel_info.logo_on = fdtdec_get_int(blob, node, "samsung,logo-on", 0);
 266         if (panel_info.logo_on) {
 267                 panel_info.logo_width = fdtdec_get_int(blob, node,
 268                                                 "samsung,logo-width", 0);
 269                 panel_info.logo_height = fdtdec_get_int(blob, node,
 270                                                 "samsung,logo-height", 0);
 271                 panel_info.logo_addr = fdtdec_get_int(blob, node,
 272                                                 "samsung,logo-addr", 0);
 273         }
 274
 275         panel_info.rgb_mode = fdtdec_get_int(blob, node,
 276                                                 "samsung,rgb-mode", 0);
 277         panel_info.pclk_name = fdtdec_get_int(blob, node,
 278                                                 "samsung,pclk-name", 0);
 279         panel_info.sclk_div = fdtdec_get_int(blob, node,
 280                                                 "samsung,sclk-div", 0);
 281         panel_info.dual_lcd_enabled = fdtdec_get_int(blob, node,
 282                                                 "samsung,dual-lcd-enabled", 0);
 283
 284         return 0;
 285 }
 286
 287 void lcd_ctrl_init(void *lcdbase)
 288 {
 289         set_system_display_ctrl();
 290         set_lcd_clk();
 291
 292 #ifdef CONFIG_EXYNOS_MIPI_DSIM
 293         exynos_init_dsim_platform_data(&panel_info);
 294 #endif
 295         exynos_lcd_misc_init(&panel_info);
 296
 297         panel_width = panel_info.vl_width;
 298         panel_height = panel_info.vl_height;
 299
 300         exynos_lcd_init_mem(lcdbase, &panel_info);
 301
 302         exynos_lcd_init(&panel_info);
 303 }
 304
 305 void lcd_enable(void)
 306 {
 307         if (panel_info.logo_on) {
 308                 memset((void *) gd->fb_base, 0, panel_width * panel_height *
 309                                 (NBITS(panel_info.vl_bpix) >> 3));
 310         }
 311
 312         lcd_panel_on(&panel_info);
 313 }
 314
 315 /* dummy function */
 316 void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue)
 317 {
 318         return;
 319 }