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