drivers/video/exynos_fb.c

   1 /*
   2  * Copyright (C) 2012 Samsung Electronics
   3  *
   4  * Author: InKi Dae <[email protected]>
   5  * Author: Donghwa Lee <[email protected]>
   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 ushort *configuration_get_cmap(void)
  41 {
  42 #if defined(CONFIG_LCD_LOGO)
  43         return bmp_logo_palette;
  44 #else
  45         return NULL;
  46 #endif
  47 }
  48
  49 static void exynos_lcd_init_mem(void *lcdbase, vidinfo_t *vid)
  50 {
  51         unsigned long palette_size;
  52         unsigned int fb_size;
  53
  54         fb_size = vid->vl_row * vid->vl_col * (NBITS(vid->vl_bpix) >> 3);
  55
  56         palette_size = NBITS(vid->vl_bpix) == 8 ? 256 : 16;
  57
  58         exynos_fimd_lcd_init_mem((unsigned long)lcdbase,
  59                         (unsigned long)fb_size, palette_size);
  60 }
  61
  62 static void exynos_lcd_init(vidinfo_t *vid)
  63 {
  64         exynos_fimd_lcd_init(vid);
  65
  66         /* Enable flushing after LCD writes if requested */
  67         lcd_set_flush_dcache(1);
  68 }
  69
  70 __weak void exynos_cfg_lcd_gpio(void)
  71 {
  72 }
  73
  74 __weak void exynos_backlight_on(unsigned int onoff)
  75 {
  76 }
  77
  78 __weak void exynos_reset_lcd(void)
  79 {
  80 }
  81
  82 __weak void exynos_lcd_power_on(void)
  83 {
  84 }
  85
  86 __weak void exynos_cfg_ldo(void)
  87 {
  88 }
  89
  90 __weak void exynos_enable_ldo(unsigned int onoff)
  91 {
  92 }
  93
  94 __weak void exynos_backlight_reset(void)
  95 {
  96 }
  97
  98 __weak int exynos_lcd_misc_init(vidinfo_t *vid)
  99 {
 100         return 0;
 101 }
 102
 103 static void lcd_panel_on(vidinfo_t *vid)
 104 {
 105         udelay(vid->init_delay);
 106
 107         exynos_backlight_reset();
 108
 109         exynos_cfg_lcd_gpio();
 110
 111         exynos_lcd_power_on();
 112
 113         udelay(vid->power_on_delay);
 114
 115         if (vid->dp_enabled)
 116                 exynos_init_dp();
 117
 118         exynos_reset_lcd();
 119
 120         udelay(vid->reset_delay);
 121
 122         exynos_backlight_on(1);
 123
 124         exynos_cfg_ldo();
 125
 126         exynos_enable_ldo(1);
 127
 128         if (vid->mipi_enabled)
 129                 exynos_mipi_dsi_init();
 130 }
 131
 132 #ifdef CONFIG_OF_CONTROL
 133 int exynos_lcd_early_init(const void *blob)
 134 {
 135         unsigned int node;
 136         node = fdtdec_next_compatible(blob, 0, COMPAT_SAMSUNG_EXYNOS_FIMD);
 137         if (node <= 0) {
 138                 debug("exynos_fb: Can't get device node for fimd\n");
 139                 return -ENODEV;
 140         }
 141
 142         panel_info.vl_col = fdtdec_get_int(blob, node, "samsung,vl-col", 0);
 143         if (panel_info.vl_col == 0) {
 144                 debug("Can't get XRES\n");
 145                 return -ENXIO;
 146         }
 147
 148         panel_info.vl_row = fdtdec_get_int(blob, node, "samsung,vl-row", 0);
 149         if (panel_info.vl_row == 0) {
 150                 debug("Can't get YRES\n");
 151                 return -ENXIO;
 152         }
 153
 154         panel_info.vl_width = fdtdec_get_int(blob, node,
 155                                                 "samsung,vl-width", 0);
 156
 157         panel_info.vl_height = fdtdec_get_int(blob, node,
 158                                                 "samsung,vl-height", 0);
 159
 160         panel_info.vl_freq = fdtdec_get_int(blob, node, "samsung,vl-freq", 0);
 161         if (panel_info.vl_freq == 0) {
 162                 debug("Can't get refresh rate\n");
 163                 return -ENXIO;
 164         }
 165
 166         if (fdtdec_get_bool(blob, node, "samsung,vl-clkp"))
 167                 panel_info.vl_clkp = CONFIG_SYS_LOW;
 168
 169         if (fdtdec_get_bool(blob, node, "samsung,vl-oep"))
 170                 panel_info.vl_oep = CONFIG_SYS_LOW;
 171
 172         if (fdtdec_get_bool(blob, node, "samsung,vl-hsp"))
 173                 panel_info.vl_hsp = CONFIG_SYS_LOW;
 174
 175         if (fdtdec_get_bool(blob, node, "samsung,vl-vsp"))
 176                 panel_info.vl_vsp = CONFIG_SYS_LOW;
 177
 178         if (fdtdec_get_bool(blob, node, "samsung,vl-dp"))
 179                 panel_info.vl_dp = CONFIG_SYS_LOW;
 180
 181         panel_info.vl_bpix = fdtdec_get_int(blob, node, "samsung,vl-bpix", 0);
 182         if (panel_info.vl_bpix == 0) {
 183                 debug("Can't get bits per pixel\n");
 184                 return -ENXIO;
 185         }
 186
 187         panel_info.vl_hspw = fdtdec_get_int(blob, node, "samsung,vl-hspw", 0);
 188         if (panel_info.vl_hspw == 0) {
 189                 debug("Can't get hsync width\n");
 190                 return -ENXIO;
 191         }
 192
 193         panel_info.vl_hfpd = fdtdec_get_int(blob, node, "samsung,vl-hfpd", 0);
 194         if (panel_info.vl_hfpd == 0) {
 195                 debug("Can't get right margin\n");
 196                 return -ENXIO;
 197         }
 198
 199         panel_info.vl_hbpd = (u_char)fdtdec_get_int(blob, node,
 200                                                         "samsung,vl-hbpd", 0);
 201         if (panel_info.vl_hbpd == 0) {
 202                 debug("Can't get left margin\n");
 203                 return -ENXIO;
 204         }
 205
 206         panel_info.vl_vspw = (u_char)fdtdec_get_int(blob, node,
 207                                                         "samsung,vl-vspw", 0);
 208         if (panel_info.vl_vspw == 0) {
 209                 debug("Can't get vsync width\n");
 210                 return -ENXIO;
 211         }
 212
 213         panel_info.vl_vfpd = fdtdec_get_int(blob, node,
 214                                                         "samsung,vl-vfpd", 0);
 215         if (panel_info.vl_vfpd == 0) {
 216                 debug("Can't get lower margin\n");
 217                 return -ENXIO;
 218         }
 219
 220         panel_info.vl_vbpd = fdtdec_get_int(blob, node, "samsung,vl-vbpd", 0);
 221         if (panel_info.vl_vbpd == 0) {
 222                 debug("Can't get upper margin\n");
 223                 return -ENXIO;
 224         }
 225
 226         panel_info.vl_cmd_allow_len = fdtdec_get_int(blob, node,
 227                                                 "samsung,vl-cmd-allow-len", 0);
 228
 229         panel_info.win_id = fdtdec_get_int(blob, node, "samsung,winid", 0);
 230         panel_info.init_delay = fdtdec_get_int(blob, node,
 231                                                 "samsung,init-delay", 0);
 232         panel_info.power_on_delay = fdtdec_get_int(blob, node,
 233                                                 "samsung,power-on-delay", 0);
 234         panel_info.reset_delay = fdtdec_get_int(blob, node,
 235                                                 "samsung,reset-delay", 0);
 236         panel_info.interface_mode = fdtdec_get_int(blob, node,
 237                                                 "samsung,interface-mode", 0);
 238         panel_info.mipi_enabled = fdtdec_get_int(blob, node,
 239                                                 "samsung,mipi-enabled", 0);
 240         panel_info.dp_enabled = fdtdec_get_int(blob, node,
 241                                                 "samsung,dp-enabled", 0);
 242         panel_info.cs_setup = fdtdec_get_int(blob, node,
 243                                                 "samsung,cs-setup", 0);
 244         panel_info.wr_setup = fdtdec_get_int(blob, node,
 245                                                 "samsung,wr-setup", 0);
 246         panel_info.wr_act = fdtdec_get_int(blob, node, "samsung,wr-act", 0);
 247         panel_info.wr_hold = fdtdec_get_int(blob, node, "samsung,wr-hold", 0);
 248
 249         panel_info.logo_on = fdtdec_get_int(blob, node, "samsung,logo-on", 0);
 250         if (panel_info.logo_on) {
 251                 panel_info.logo_width = fdtdec_get_int(blob, node,
 252                                                 "samsung,logo-width", 0);
 253                 panel_info.logo_height = fdtdec_get_int(blob, node,
 254                                                 "samsung,logo-height", 0);
 255                 panel_info.logo_addr = fdtdec_get_int(blob, node,
 256                                                 "samsung,logo-addr", 0);
 257         }
 258
 259         panel_info.rgb_mode = fdtdec_get_int(blob, node,
 260                                                 "samsung,rgb-mode", 0);
 261         panel_info.pclk_name = fdtdec_get_int(blob, node,
 262                                                 "samsung,pclk-name", 0);
 263         panel_info.sclk_div = fdtdec_get_int(blob, node,
 264                                                 "samsung,sclk-div", 0);
 265         panel_info.dual_lcd_enabled = fdtdec_get_int(blob, node,
 266                                                 "samsung,dual-lcd-enabled", 0);
 267
 268         return 0;
 269 }
 270 #endif
 271
 272 void lcd_ctrl_init(void *lcdbase)
 273 {
 274         set_system_display_ctrl();
 275         set_lcd_clk();
 276
 277 #ifdef CONFIG_OF_CONTROL
 278 #ifdef CONFIG_EXYNOS_MIPI_DSIM
 279         exynos_init_dsim_platform_data(&panel_info);
 280 #endif
 281         exynos_lcd_misc_init(&panel_info);
 282 #else
 283         /* initialize parameters which is specific to panel. */
 284         init_panel_info(&panel_info);
 285 #endif
 286
 287         panel_width = panel_info.vl_width;
 288         panel_height = panel_info.vl_height;
 289
 290         exynos_lcd_init_mem(lcdbase, &panel_info);
 291
 292         exynos_lcd_init(&panel_info);
 293 }
 294
 295 void lcd_enable(void)
 296 {
 297         if (panel_info.logo_on) {
 298                 memset((void *) gd->fb_base, 0, panel_width * panel_height *
 299                                 (NBITS(panel_info.vl_bpix) >> 3));
 300         }
 301
 302         lcd_panel_on(&panel_info);
 303 }
 304
 305 /* dummy function */
 306 void lcd_setcolreg(ushort regno, ushort red, ushort green, ushort blue)
 307 {
 308         return;
 309 }