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 /*
  31  * board_init_f(arch/arm/lib/board.c) calls lcd_setmem() which needs
  32  * panel_info.vl_col, panel_info.vl_row and panel_info.vl_bpix to reserve
  33  * FB memory at a very early stage, i.e even before exynos_fimd_parse_dt()
  34  * is called. So, we are forced to statically assign it.
  35  */
  36 #ifdef CONFIG_OF_CONTROL
  37 vidinfo_t panel_info  = {
  38         .vl_col = LCD_XRES,
  39         .vl_row = LCD_YRES,
  40         .vl_bpix = LCD_COLOR16,
  41 };
  42 #endif
  43
  44 static void exynos_lcd_init_mem(void *lcdbase, vidinfo_t *vid)
  45 {
  46         unsigned long palette_size;
  47         unsigned int fb_size;
  48
  49         fb_size = vid->vl_row * vid->vl_col * (NBITS(vid->vl_bpix) >> 3);
  50
  51         palette_size = NBITS(vid->vl_bpix) == 8 ? 256 : 16;
  52
  53         exynos_fimd_lcd_init_mem((unsigned long)lcdbase,
  54                         (unsigned long)fb_size, palette_size);
  55 }
  56
  57 static void exynos_lcd_init(vidinfo_t *vid)
  58 {
  59         exynos_fimd_lcd_init(vid);
  60
  61         /* Enable flushing after LCD writes if requested */
  62         lcd_set_flush_dcache(1);
  63 }
  64
  65 void __exynos_cfg_lcd_gpio(void)
  66 {
  67 }
  68 void exynos_cfg_lcd_gpio(void)
  69         __attribute__((weak, alias("__exynos_cfg_lcd_gpio")));
  70
  71 void __exynos_backlight_on(unsigned int onoff)
  72 {
  73 }
  74 void exynos_backlight_on(unsigned int onoff)
  75         __attribute__((weak, alias("__exynos_cfg_lcd_gpio")));
  76
  77 void __exynos_reset_lcd(void)
  78 {
  79 }
  80 void exynos_reset_lcd(void)
  81         __attribute__((weak, alias("__exynos_reset_lcd")));
  82
  83 void __exynos_lcd_power_on(void)
  84 {
  85 }
  86 void exynos_lcd_power_on(void)
  87         __attribute__((weak, alias("__exynos_lcd_power_on")));
  88
  89 void __exynos_cfg_ldo(void)
  90 {
  91 }
  92 void exynos_cfg_ldo(void)
  93         __attribute__((weak, alias("__exynos_cfg_ldo")));
  94
  95 void __exynos_enable_ldo(unsigned int onoff)
  96 {
  97 }
  98 void exynos_enable_ldo(unsigned int onoff)
  99         __attribute__((weak, alias("__exynos_enable_ldo")));
 100
 101 void __exynos_backlight_reset(void)
 102 {
 103 }
 104 void exynos_backlight_reset(void)
 105         __attribute__((weak, alias("__exynos_backlight_reset")));
 106
 107 static void lcd_panel_on(vidinfo_t *vid)
 108 {
 109         udelay(vid->init_delay);
 110
 111         exynos_backlight_reset();
 112
 113         exynos_cfg_lcd_gpio();
 114
 115         exynos_lcd_power_on();
 116
 117         udelay(vid->power_on_delay);
 118
 119         if (vid->dp_enabled)
 120                 exynos_init_dp();
 121
 122         exynos_reset_lcd();
 123
 124         udelay(vid->reset_delay);
 125
 126         exynos_backlight_on(1);
 127
 128         exynos_cfg_ldo();
 129
 130         exynos_enable_ldo(1);
 131
 132         if (vid->mipi_enabled)
 133                 exynos_mipi_dsi_init();
 134 }
 135
 136 #ifdef CONFIG_OF_CONTROL
 137 int exynos_fimd_parse_dt(const void *blob)
 138 {
 139         unsigned int node;
 140         node = fdtdec_next_compatible(blob, 0, COMPAT_SAMSUNG_EXYNOS_FIMD);
 141         if (node <= 0) {
 142                 debug("exynos_fb: Can't get device node for fimd\n");
 143                 return -ENODEV;
 144         }
 145
 146         panel_info.vl_col = fdtdec_get_int(blob, node, "samsung,vl-col", 0);
 147         if (panel_info.vl_col == 0) {
 148                 debug("Can't get XRES\n");
 149                 return -ENXIO;
 150         }
 151
 152         panel_info.vl_row = fdtdec_get_int(blob, node, "samsung,vl-row", 0);
 153         if (panel_info.vl_row == 0) {
 154                 debug("Can't get YRES\n");
 155                 return -ENXIO;
 156         }
 157
 158         panel_info.vl_width = fdtdec_get_int(blob, node,
 159                                                 "samsung,vl-width", 0);
 160
 161         panel_info.vl_height = fdtdec_get_int(blob, node,
 162                                                 "samsung,vl-height", 0);
 163
 164         panel_info.vl_freq = fdtdec_get_int(blob, node, "samsung,vl-freq", 0);
 165         if (panel_info.vl_freq == 0) {
 166                 debug("Can't get refresh rate\n");
 167                 return -ENXIO;
 168         }
 169
 170         if (fdtdec_get_bool(blob, node, "samsung,vl-clkp"))
 171                 panel_info.vl_clkp = CONFIG_SYS_LOW;
 172
 173         if (fdtdec_get_bool(blob, node, "samsung,vl-oep"))
 174                 panel_info.vl_oep = CONFIG_SYS_LOW;
 175
 176         if (fdtdec_get_bool(blob, node, "samsung,vl-hsp"))
 177                 panel_info.vl_hsp = CONFIG_SYS_LOW;
 178
 179         if (fdtdec_get_bool(blob, node, "samsung,vl-vsp"))
 180                 panel_info.vl_vsp = CONFIG_SYS_LOW;
 181
 182         if (fdtdec_get_bool(blob, node, "samsung,vl-dp"))
 183                 panel_info.vl_dp = CONFIG_SYS_LOW;
 184
 185         panel_info.vl_bpix = fdtdec_get_int(blob, node, "samsung,vl-bpix", 0);
 186         if (panel_info.vl_bpix == 0) {
 187                 debug("Can't get bits per pixel\n");
 188                 return -ENXIO;
 189         }
 190
 191         panel_info.vl_hspw = fdtdec_get_int(blob, node, "samsung,vl-hspw", 0);
 192         if (panel_info.vl_hspw == 0) {
 193                 debug("Can't get hsync width\n");
 194                 return -ENXIO;
 195         }
 196
 197         panel_info.vl_hfpd = fdtdec_get_int(blob, node, "samsung,vl-hfpd", 0);
 198         if (panel_info.vl_hfpd == 0) {
 199                 debug("Can't get right margin\n");
 200                 return -ENXIO;
 201         }
 202
 203         panel_info.vl_hbpd = (u_char)fdtdec_get_int(blob, node,
 204                                                         "samsung,vl-hbpd", 0);
 205         if (panel_info.vl_hbpd == 0) {
 206                 debug("Can't get left margin\n");
 207                 return -ENXIO;
 208         }
 209
 210         panel_info.vl_vspw = (u_char)fdtdec_get_int(blob, node,
 211                                                         "samsung,vl-vspw", 0);
 212         if (panel_info.vl_vspw == 0) {
 213                 debug("Can't get vsync width\n");
 214                 return -ENXIO;
 215         }
 216
 217         panel_info.vl_vfpd = fdtdec_get_int(blob, node,
 218                                                         "samsung,vl-vfpd", 0);
 219         if (panel_info.vl_vfpd == 0) {
 220                 debug("Can't get lower margin\n");
 221                 return -ENXIO;
 222         }
 223
 224         panel_info.vl_vbpd = fdtdec_get_int(blob, node, "samsung,vl-vbpd", 0);
 225         if (panel_info.vl_vbpd == 0) {
 226                 debug("Can't get upper margin\n");
 227                 return -ENXIO;
 228         }
 229
 230         panel_info.vl_cmd_allow_len = fdtdec_get_int(blob, node,
 231                                                 "samsung,vl-cmd-allow-len", 0);
 232
 233         panel_info.win_id = fdtdec_get_int(blob, node, "samsung,winid", 0);
 234         panel_info.init_delay = fdtdec_get_int(blob, node,
 235                                                 "samsung,init-delay", 0);
 236         panel_info.power_on_delay = fdtdec_get_int(blob, node,
 237                                                 "samsung,power-on-delay", 0);
 238         panel_info.reset_delay = fdtdec_get_int(blob, node,
 239                                                 "samsung,reset-delay", 0);
 240         panel_info.interface_mode = fdtdec_get_int(blob, node,
 241                                                 "samsung,interface-mode", 0);
 242         panel_info.mipi_enabled = fdtdec_get_int(blob, node,
 243                                                 "samsung,mipi-enabled", 0);
 244         panel_info.dp_enabled = fdtdec_get_int(blob, node,
 245                                                 "samsung,dp-enabled", 0);
 246         panel_info.cs_setup = fdtdec_get_int(blob, node,
 247                                                 "samsung,cs-setup", 0);
 248         panel_info.wr_setup = fdtdec_get_int(blob, node,
 249                                                 "samsung,wr-setup", 0);
 250         panel_info.wr_act = fdtdec_get_int(blob, node, "samsung,wr-act", 0);
 251         panel_info.wr_hold = fdtdec_get_int(blob, node, "samsung,wr-hold", 0);
 252
 253         panel_info.logo_on = fdtdec_get_int(blob, node, "samsung,logo-on", 0);
 254         if (panel_info.logo_on) {
 255                 panel_info.logo_width = fdtdec_get_int(blob, node,
 256                                                 "samsung,logo-width", 0);
 257                 panel_info.logo_height = fdtdec_get_int(blob, node,
 258                                                 "samsung,logo-height", 0);
 259                 panel_info.logo_addr = fdtdec_get_int(blob, node,
 260                                                 "samsung,logo-addr", 0);
 261         }
 262
 263         panel_info.rgb_mode = fdtdec_get_int(blob, node,
 264                                                 "samsung,rgb-mode", 0);
 265         panel_info.pclk_name = fdtdec_get_int(blob, node,
 266                                                 "samsung,pclk-name", 0);
 267         panel_info.sclk_div = fdtdec_get_int(blob, node,
 268                                                 "samsung,sclk-div", 0);
 269         panel_info.dual_lcd_enabled = fdtdec_get_int(blob, node,
 270                                                 "samsung,dual-lcd-enabled", 0);
 271
 272         return 0;
 273 }
 274 #endif
 275
 276 void lcd_ctrl_init(void *lcdbase)
 277 {
 278         set_system_display_ctrl();
 279         set_lcd_clk();
 280
 281 #ifdef CONFIG_OF_CONTROL
 282         if (exynos_fimd_parse_dt(gd->fdt_blob))
 283                 debug("Can't get proper panel info\n");
 284 #else
 285         /* initialize parameters which is specific to panel. */
 286         init_panel_info(&panel_info);
 287 #endif
 288         panel_width = panel_info.vl_width;
 289         panel_height = panel_info.vl_height;
 290
 291         exynos_lcd_init_mem(lcdbase, &panel_info);
 292
 293         exynos_lcd_init(&panel_info);
 294 }
 295
 296 void lcd_enable(void)
 297 {
 298         if (panel_info.logo_on) {
 299                 memset((void *) gd->fb_base, 0, panel_width * panel_height *
 300                                 (NBITS(panel_info.vl_bpix) >> 3));
 301         }
 302
 303         lcd_panel_on(&panel_info);
 304 }
 305
 306 /* dummy function */
 307 void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue)
 308 {
 309         return;
 310 }