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/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 #if CONFIG_IS_ENABLED(OF_CONTROL)
  32 vidinfo_t panel_info  = {
  33         /*
  34          * Insert a value here so that we don't end up in the BSS
  35          * Reference: drivers/video/tegra.c
  36          */
  37         .vl_col = -1,
  38 };
  39 #endif
  40
  41 ushort *configuration_get_cmap(void)
  42 {
  43 #if defined(CONFIG_LCD_LOGO)
  44         return bmp_logo_palette;
  45 #else
  46         return NULL;
  47 #endif
  48 }
  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         palette_size = NBITS(vid->vl_bpix) == 8 ? 256 : 16;
  58
  59         exynos_fimd_lcd_init_mem((unsigned long)lcdbase,
  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         /* Enable flushing after LCD writes if requested */
  68         lcd_set_flush_dcache(1);
  69 }
  70
  71 __weak void exynos_cfg_lcd_gpio(void)
  72 {
  73 }
  74
  75 __weak void exynos_backlight_on(unsigned int onoff)
  76 {
  77 }
  78
  79 __weak void exynos_reset_lcd(void)
  80 {
  81 }
  82
  83 __weak void exynos_lcd_power_on(void)
  84 {
  85 }
  86
  87 __weak void exynos_cfg_ldo(void)
  88 {
  89 }
  90
  91 __weak void exynos_enable_ldo(unsigned int onoff)
  92 {
  93 }
  94
  95 __weak void exynos_backlight_reset(void)
  96 {
  97 }
  98
  99 __weak int exynos_lcd_misc_init(vidinfo_t *vid)
 100 {
 101         return 0;
 102 }
 103
 104 static void lcd_panel_on(vidinfo_t *vid)
 105 {
 106         struct gpio_desc pwm_out_gpio;
 107         struct gpio_desc bl_en_gpio;
 108         unsigned int node;
 109
 110         udelay(vid->init_delay);
 111
 112         exynos_backlight_reset();
 113
 114         exynos_cfg_lcd_gpio();
 115
 116         exynos_lcd_power_on();
 117
 118         udelay(vid->power_on_delay);
 119
 120         if (vid->dp_enabled)
 121                 exynos_init_dp();
 122
 123         exynos_reset_lcd();
 124
 125         udelay(vid->reset_delay);
 126
 127         exynos_backlight_on(1);
 128
 129 #if CONFIG_IS_ENABLED(OF_CONTROL)
 130         node = fdtdec_next_compatible(gd->fdt_blob, 0,
 131                                                 COMPAT_SAMSUNG_EXYNOS_FIMD);
 132         if (node <= 0) {
 133                 debug("FIMD: Can't get device node for FIMD\n");
 134                 return;
 135         }
 136         gpio_request_by_name_nodev(gd->fdt_blob, node, "samsung,pwm-out-gpio",
 137                                    0, &pwm_out_gpio,
 138                                    GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
 139
 140         gpio_request_by_name_nodev(gd->fdt_blob, node, "samsung,bl-en-gpio", 0,
 141                                    &bl_en_gpio,
 142                                    GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
 143
 144 #endif
 145         exynos_cfg_ldo();
 146
 147         exynos_enable_ldo(1);
 148
 149         if (vid->mipi_enabled)
 150                 exynos_mipi_dsi_init();
 151 }
 152
 153 #if CONFIG_IS_ENABLED(OF_CONTROL)
 154 int exynos_lcd_early_init(const void *blob)
 155 {
 156         unsigned int node;
 157         node = fdtdec_next_compatible(blob, 0, COMPAT_SAMSUNG_EXYNOS_FIMD);
 158         if (node <= 0) {
 159                 debug("exynos_fb: Can't get device node for fimd\n");
 160                 return -ENODEV;
 161         }
 162
 163         panel_info.vl_col = fdtdec_get_int(blob, node, "samsung,vl-col", 0);
 164         if (panel_info.vl_col == 0) {
 165                 debug("Can't get XRES\n");
 166                 return -ENXIO;
 167         }
 168
 169         panel_info.vl_row = fdtdec_get_int(blob, node, "samsung,vl-row", 0);
 170         if (panel_info.vl_row == 0) {
 171                 debug("Can't get YRES\n");
 172                 return -ENXIO;
 173         }
 174
 175         panel_info.vl_width = fdtdec_get_int(blob, node,
 176                                                 "samsung,vl-width", 0);
 177
 178         panel_info.vl_height = fdtdec_get_int(blob, node,
 179                                                 "samsung,vl-height", 0);
 180
 181         panel_info.vl_freq = fdtdec_get_int(blob, node, "samsung,vl-freq", 0);
 182         if (panel_info.vl_freq == 0) {
 183                 debug("Can't get refresh rate\n");
 184                 return -ENXIO;
 185         }
 186
 187         if (fdtdec_get_bool(blob, node, "samsung,vl-clkp"))
 188                 panel_info.vl_clkp = CONFIG_SYS_LOW;
 189
 190         if (fdtdec_get_bool(blob, node, "samsung,vl-oep"))
 191                 panel_info.vl_oep = CONFIG_SYS_LOW;
 192
 193         if (fdtdec_get_bool(blob, node, "samsung,vl-hsp"))
 194                 panel_info.vl_hsp = CONFIG_SYS_LOW;
 195
 196         if (fdtdec_get_bool(blob, node, "samsung,vl-vsp"))
 197                 panel_info.vl_vsp = CONFIG_SYS_LOW;
 198
 199         if (fdtdec_get_bool(blob, node, "samsung,vl-dp"))
 200                 panel_info.vl_dp = CONFIG_SYS_LOW;
 201
 202         panel_info.vl_bpix = fdtdec_get_int(blob, node, "samsung,vl-bpix", 0);
 203         if (panel_info.vl_bpix == 0) {
 204                 debug("Can't get bits per pixel\n");
 205                 return -ENXIO;
 206         }
 207
 208         panel_info.vl_hspw = fdtdec_get_int(blob, node, "samsung,vl-hspw", 0);
 209         if (panel_info.vl_hspw == 0) {
 210                 debug("Can't get hsync width\n");
 211                 return -ENXIO;
 212         }
 213
 214         panel_info.vl_hfpd = fdtdec_get_int(blob, node, "samsung,vl-hfpd", 0);
 215         if (panel_info.vl_hfpd == 0) {
 216                 debug("Can't get right margin\n");
 217                 return -ENXIO;
 218         }
 219
 220         panel_info.vl_hbpd = (u_char)fdtdec_get_int(blob, node,
 221                                                         "samsung,vl-hbpd", 0);
 222         if (panel_info.vl_hbpd == 0) {
 223                 debug("Can't get left margin\n");
 224                 return -ENXIO;
 225         }
 226
 227         panel_info.vl_vspw = (u_char)fdtdec_get_int(blob, node,
 228                                                         "samsung,vl-vspw", 0);
 229         if (panel_info.vl_vspw == 0) {
 230                 debug("Can't get vsync width\n");
 231                 return -ENXIO;
 232         }
 233
 234         panel_info.vl_vfpd = fdtdec_get_int(blob, node,
 235                                                         "samsung,vl-vfpd", 0);
 236         if (panel_info.vl_vfpd == 0) {
 237                 debug("Can't get lower margin\n");
 238                 return -ENXIO;
 239         }
 240
 241         panel_info.vl_vbpd = fdtdec_get_int(blob, node, "samsung,vl-vbpd", 0);
 242         if (panel_info.vl_vbpd == 0) {
 243                 debug("Can't get upper margin\n");
 244                 return -ENXIO;
 245         }
 246
 247         panel_info.vl_cmd_allow_len = fdtdec_get_int(blob, node,
 248                                                 "samsung,vl-cmd-allow-len", 0);
 249
 250         panel_info.win_id = fdtdec_get_int(blob, node, "samsung,winid", 0);
 251         panel_info.init_delay = fdtdec_get_int(blob, node,
 252                                                 "samsung,init-delay", 0);
 253         panel_info.power_on_delay = fdtdec_get_int(blob, node,
 254                                                 "samsung,power-on-delay", 0);
 255         panel_info.reset_delay = fdtdec_get_int(blob, node,
 256                                                 "samsung,reset-delay", 0);
 257         panel_info.interface_mode = fdtdec_get_int(blob, node,
 258                                                 "samsung,interface-mode", 0);
 259         panel_info.mipi_enabled = fdtdec_get_int(blob, node,
 260                                                 "samsung,mipi-enabled", 0);
 261         panel_info.dp_enabled = fdtdec_get_int(blob, node,
 262                                                 "samsung,dp-enabled", 0);
 263         panel_info.cs_setup = fdtdec_get_int(blob, node,
 264                                                 "samsung,cs-setup", 0);
 265         panel_info.wr_setup = fdtdec_get_int(blob, node,
 266                                                 "samsung,wr-setup", 0);
 267         panel_info.wr_act = fdtdec_get_int(blob, node, "samsung,wr-act", 0);
 268         panel_info.wr_hold = fdtdec_get_int(blob, node, "samsung,wr-hold", 0);
 269
 270         panel_info.logo_on = fdtdec_get_int(blob, node, "samsung,logo-on", 0);
 271         if (panel_info.logo_on) {
 272                 panel_info.logo_width = fdtdec_get_int(blob, node,
 273                                                 "samsung,logo-width", 0);
 274                 panel_info.logo_height = fdtdec_get_int(blob, node,
 275                                                 "samsung,logo-height", 0);
 276                 panel_info.logo_addr = fdtdec_get_int(blob, node,
 277                                                 "samsung,logo-addr", 0);
 278         }
 279
 280         panel_info.rgb_mode = fdtdec_get_int(blob, node,
 281                                                 "samsung,rgb-mode", 0);
 282         panel_info.pclk_name = fdtdec_get_int(blob, node,
 283                                                 "samsung,pclk-name", 0);
 284         panel_info.sclk_div = fdtdec_get_int(blob, node,
 285                                                 "samsung,sclk-div", 0);
 286         panel_info.dual_lcd_enabled = fdtdec_get_int(blob, node,
 287                                                 "samsung,dual-lcd-enabled", 0);
 288
 289         return 0;
 290 }
 291 #endif
 292
 293 void lcd_ctrl_init(void *lcdbase)
 294 {
 295         set_system_display_ctrl();
 296         set_lcd_clk();
 297
 298 #if CONFIG_IS_ENABLED(OF_CONTROL)
 299 #ifdef CONFIG_EXYNOS_MIPI_DSIM
 300         exynos_init_dsim_platform_data(&panel_info);
 301 #endif
 302         exynos_lcd_misc_init(&panel_info);
 303 #else
 304         /* initialize parameters which is specific to panel. */
 305         init_panel_info(&panel_info);
 306 #endif
 307
 308         panel_width = panel_info.vl_width;
 309         panel_height = panel_info.vl_height;
 310
 311         exynos_lcd_init_mem(lcdbase, &panel_info);
 312
 313         exynos_lcd_init(&panel_info);
 314 }
 315
 316 void lcd_enable(void)
 317 {
 318         if (panel_info.logo_on) {
 319                 memset((void *) gd->fb_base, 0, panel_width * panel_height *
 320                                 (NBITS(panel_info.vl_bpix) >> 3));
 321         }
 322
 323         lcd_panel_on(&panel_info);
 324 }
 325
 326 /* dummy function */
 327 void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue)
 328 {
 329         return;
 330 }