drivers/video/Kconfig

   1 #
   2 # Video configuration
   3 #
   4
   5 menu "Graphics support"
   6
   7 config DM_VIDEO
   8         bool "Enable driver model support for LCD/video"
   9         depends on DM
  10         help
  11           This enables driver model for LCD and video devices. These support
  12           a bitmap display of various sizes and depths which can be drawn on
  13           to display a command-line console or splash screen. Enabling this
  14           option compiles in the video uclass and routes all LCD/video access
  15           through this.
  16
  17 config VIDEO_BPP8
  18         bool "Support 8-bit-per-pixel displays"
  19         depends on DM_VIDEO
  20         default y if DM_VIDEO
  21         help
  22           Support drawing text and bitmaps onto a 8-bit-per-pixel display.
  23           Enabling this will include code to support this display. Without
  24           this option, such displays will not be supported and console output
  25           will be empty.
  26
  27 config VIDEO_BPP16
  28         bool "Support 16-bit-per-pixel displays"
  29         depends on DM_VIDEO
  30         default y if DM_VIDEO
  31         help
  32           Support drawing text and bitmaps onto a 16-bit-per-pixel display.
  33           Enabling this will include code to support this display. Without
  34           this option, such displays will not be supported and console output
  35           will be empty.
  36
  37 config VIDEO_BPP32
  38         bool "Support 32-bit-per-pixel displays"
  39         depends on DM_VIDEO
  40         default y if DM_VIDEO
  41         help
  42           Support drawing text and bitmaps onto a 32-bit-per-pixel display.
  43           Enabling this will include code to support this display. Without
  44           this option, such displays will not be supported and console output
  45           will be empty.
  46
  47 config CONSOLE_NORMAL
  48         bool "Support a simple text console"
  49         depends on DM_VIDEO
  50         default y if DM_VIDEO
  51         help
  52           Support drawing text on the frame buffer console so that it can be
  53           used as a console. Rotation is not supported by this driver (see
  54           CONFIG_CONSOLE_ROTATION for that). A built-in 8x16 font is used
  55           for the display.
  56
  57 config CONSOLE_ROTATION
  58         bool "Support rotated displays"
  59         depends on DM_VIDEO
  60         help
  61           Sometimes, for example if the display is mounted in portrait
  62           mode or even if it's mounted landscape but rotated by 180degree,
  63           we need to rotate our content of the display relative to the
  64           framebuffer, so that user can read the messages which are
  65           printed out. Enable this option to include a text driver which can
  66           support this. The rotation is set by the 'rot' parameter in
  67           struct video_priv: 0=unrotated, 1=90 degrees clockwise, 2=180
  68           degrees, 3=270 degrees.
  69
  70 config CONSOLE_TRUETYPE
  71         bool "Support a console that uses TrueType fonts"
  72         depends on DM_VIDEO
  73         help
  74           TrueTrype fonts can provide outline-drawing capability rather than
  75           needing to provide a bitmap for each font and size that is needed.
  76           With this option you can adjust the text size and use a variety of
  77           fonts. Note that this is noticeably slower than with normal console.
  78
  79 config CONSOLE_TRUETYPE_SIZE
  80         int "TrueType font size"
  81         depends on CONSOLE_TRUETYPE
  82         default 18
  83         help
  84           This sets the font size for the console. The size is measured in
  85           pixels and is the nominal height of a character. Note that fonts
  86           are commonly measured in 'points', being 1/72 inch (about 3.52mm).
  87           However that measurement depends on the size of your display and
  88           there is no standard display density. At present there is not a
  89           method to select the display's physical size, which would allow
  90           U-Boot to calculate the correct font size.
  91
  92 config SYS_WHITE_ON_BLACK
  93         bool "Display console as white on a black background"
  94         default y if ARCH_AT91 || ARCH_EXYNOS || ARCH_ROCKCHIP || TEGRA || X86
  95         help
  96          Normally the display is black on a white background, Enable this
  97          option to invert this, i.e. white on a black background. This can be
  98          better in low-light situations or to reduce eye strain in some
  99          cases.
 100
 101 source "drivers/video/fonts/Kconfig"
 102
 103 config VIDCONSOLE_AS_LCD
 104         bool "Use 'vidconsole' when 'lcd' is seen in stdout"
 105         depends on DM_VIDEO
 106         help
 107           This is a work-around for boards which have 'lcd' in their stdout
 108           environment variable, but have moved to use driver model for video.
 109           In this case the console will no-longer work. While it is possible
 110           to update the environment, the breakage may be confusing for users.
 111           This option will be removed around the end of 2016.
 112
 113 config VIDEO_COREBOOT
 114         bool "Enable coreboot framebuffer driver support"
 115         depends on X86 && SYS_COREBOOT
 116         help
 117           Turn on this option to enable a framebuffer driver when U-Boot is
 118           loaded by coreboot where the graphics device is configured by
 119           coreboot already. This can in principle be used with any platform
 120           that coreboot supports.
 121
 122 config VIDEO_VESA
 123         bool "Enable VESA video driver support"
 124         default n
 125         help
 126           Turn on this option to enable a very simple driver which uses vesa
 127           to discover the video mode and then provides a frame buffer for use
 128           by U-Boot. This can in principle be used with any platform that
 129           supports PCI and video cards that support VESA BIOS Extension (VBE).
 130
 131 config FRAMEBUFFER_SET_VESA_MODE
 132         bool "Set framebuffer graphics resolution"
 133         depends on VIDEO_VESA || VIDEO_BROADWELL_IGD
 134         help
 135           Set VESA/native framebuffer mode (needed for bootsplash and graphical
 136           framebuffer console)
 137
 138 choice
 139         prompt "framebuffer graphics resolution"
 140         default FRAMEBUFFER_VESA_MODE_117
 141         depends on FRAMEBUFFER_SET_VESA_MODE
 142         help
 143           This option sets the resolution used for the U-Boot framebuffer (and
 144           bootsplash screen).
 145
 146 config FRAMEBUFFER_VESA_MODE_100
 147         bool "640x400 256-color"
 148
 149 config FRAMEBUFFER_VESA_MODE_101
 150         bool "640x480 256-color"
 151
 152 config FRAMEBUFFER_VESA_MODE_102
 153         bool "800x600 16-color"
 154
 155 config FRAMEBUFFER_VESA_MODE_103
 156         bool "800x600 256-color"
 157
 158 config FRAMEBUFFER_VESA_MODE_104
 159         bool "1024x768 16-color"
 160
 161 config FRAMEBUFFER_VESA_MODE_105
 162         bool "1024x768 256-color"
 163
 164 config FRAMEBUFFER_VESA_MODE_106
 165         bool "1280x1024 16-color"
 166
 167 config FRAMEBUFFER_VESA_MODE_107
 168         bool "1280x1024 256-color"
 169
 170 config FRAMEBUFFER_VESA_MODE_108
 171         bool "80x60 text"
 172
 173 config FRAMEBUFFER_VESA_MODE_109
 174         bool "132x25 text"
 175
 176 config FRAMEBUFFER_VESA_MODE_10A
 177         bool "132x43 text"
 178
 179 config FRAMEBUFFER_VESA_MODE_10B
 180         bool "132x50 text"
 181
 182 config FRAMEBUFFER_VESA_MODE_10C
 183         bool "132x60 text"
 184
 185 config FRAMEBUFFER_VESA_MODE_10D
 186         bool "320x200 32k-color (1:5:5:5)"
 187
 188 config FRAMEBUFFER_VESA_MODE_10E
 189         bool "320x200 64k-color (5:6:5)"
 190
 191 config FRAMEBUFFER_VESA_MODE_10F
 192         bool "320x200 16.8M-color (8:8:8)"
 193
 194 config FRAMEBUFFER_VESA_MODE_110
 195         bool "640x480 32k-color (1:5:5:5)"
 196
 197 config FRAMEBUFFER_VESA_MODE_111
 198         bool "640x480 64k-color (5:6:5)"
 199
 200 config FRAMEBUFFER_VESA_MODE_112
 201         bool "640x480 16.8M-color (8:8:8)"
 202
 203 config FRAMEBUFFER_VESA_MODE_113
 204         bool "800x600 32k-color (1:5:5:5)"
 205
 206 config FRAMEBUFFER_VESA_MODE_114
 207         bool "800x600 64k-color (5:6:5)"
 208
 209 config FRAMEBUFFER_VESA_MODE_115
 210         bool "800x600 16.8M-color (8:8:8)"
 211
 212 config FRAMEBUFFER_VESA_MODE_116
 213         bool "1024x768 32k-color (1:5:5:5)"
 214
 215 config FRAMEBUFFER_VESA_MODE_117
 216         bool "1024x768 64k-color (5:6:5)"
 217
 218 config FRAMEBUFFER_VESA_MODE_118
 219         bool "1024x768 16.8M-color (8:8:8)"
 220
 221 config FRAMEBUFFER_VESA_MODE_119
 222         bool "1280x1024 32k-color (1:5:5:5)"
 223
 224 config FRAMEBUFFER_VESA_MODE_11A
 225         bool "1280x1024 64k-color (5:6:5)"
 226
 227 config FRAMEBUFFER_VESA_MODE_11B
 228         bool "1280x1024 16.8M-color (8:8:8)"
 229
 230 config FRAMEBUFFER_VESA_MODE_USER
 231         bool "Manually select VESA mode"
 232
 233 endchoice
 234
 235 # Map the config names to an integer (KB).
 236 config FRAMEBUFFER_VESA_MODE
 237         prompt "VESA mode" if FRAMEBUFFER_VESA_MODE_USER
 238         hex
 239         default 0x100 if FRAMEBUFFER_VESA_MODE_100
 240         default 0x101 if FRAMEBUFFER_VESA_MODE_101
 241         default 0x102 if FRAMEBUFFER_VESA_MODE_102
 242         default 0x103 if FRAMEBUFFER_VESA_MODE_103
 243         default 0x104 if FRAMEBUFFER_VESA_MODE_104
 244         default 0x105 if FRAMEBUFFER_VESA_MODE_105
 245         default 0x106 if FRAMEBUFFER_VESA_MODE_106
 246         default 0x107 if FRAMEBUFFER_VESA_MODE_107
 247         default 0x108 if FRAMEBUFFER_VESA_MODE_108
 248         default 0x109 if FRAMEBUFFER_VESA_MODE_109
 249         default 0x10A if FRAMEBUFFER_VESA_MODE_10A
 250         default 0x10B if FRAMEBUFFER_VESA_MODE_10B
 251         default 0x10C if FRAMEBUFFER_VESA_MODE_10C
 252         default 0x10D if FRAMEBUFFER_VESA_MODE_10D
 253         default 0x10E if FRAMEBUFFER_VESA_MODE_10E
 254         default 0x10F if FRAMEBUFFER_VESA_MODE_10F
 255         default 0x110 if FRAMEBUFFER_VESA_MODE_110
 256         default 0x111 if FRAMEBUFFER_VESA_MODE_111
 257         default 0x112 if FRAMEBUFFER_VESA_MODE_112
 258         default 0x113 if FRAMEBUFFER_VESA_MODE_113
 259         default 0x114 if FRAMEBUFFER_VESA_MODE_114
 260         default 0x115 if FRAMEBUFFER_VESA_MODE_115
 261         default 0x116 if FRAMEBUFFER_VESA_MODE_116
 262         default 0x117 if FRAMEBUFFER_VESA_MODE_117
 263         default 0x118 if FRAMEBUFFER_VESA_MODE_118
 264         default 0x119 if FRAMEBUFFER_VESA_MODE_119
 265         default 0x11A if FRAMEBUFFER_VESA_MODE_11A
 266         default 0x11B if FRAMEBUFFER_VESA_MODE_11B
 267         default 0x117 if FRAMEBUFFER_VESA_MODE_USER
 268
 269 config VIDEO_LCD_ANX9804
 270         bool "ANX9804 bridge chip"
 271         default n
 272         ---help---
 273         Support for the ANX9804 bridge chip, which can take pixel data coming
 274         from a parallel LCD interface and translate it on the fy into a DP
 275         interface for driving eDP TFT displays. It uses I2C for configuration.
 276
 277 config VIDEO_LCD_SSD2828
 278         bool "SSD2828 bridge chip"
 279         default n
 280         ---help---
 281         Support for the SSD2828 bridge chip, which can take pixel data coming
 282         from a parallel LCD interface and translate it on the fly into MIPI DSI
 283         interface for driving a MIPI compatible LCD panel. It uses SPI for
 284         configuration.
 285
 286 config VIDEO_LCD_SSD2828_TX_CLK
 287         int "SSD2828 TX_CLK frequency (in MHz)"
 288         depends on VIDEO_LCD_SSD2828
 289         default 0
 290         ---help---
 291         The frequency of the crystal, which is clocking SSD2828. It may be
 292         anything in the 8MHz-30MHz range and the exact value should be
 293         retrieved from the board schematics. Or in the case of Allwinner
 294         hardware, it can be usually found as 'lcd_xtal_freq' variable in
 295         FEX files. It can be also set to 0 for selecting PCLK from the
 296         parallel LCD interface instead of TX_CLK as the PLL clock source.
 297
 298 config VIDEO_LCD_SSD2828_RESET
 299         string "RESET pin of SSD2828"
 300         depends on VIDEO_LCD_SSD2828
 301         default ""
 302         ---help---
 303         The reset pin of SSD2828 chip. This takes a string in the format
 304         understood by 'name_to_gpio' function, e.g. PH1 for pin 1 of port H.
 305
 306 config VIDEO_LCD_HITACHI_TX18D42VM
 307         bool "Hitachi tx18d42vm LVDS LCD panel support"
 308         depends on VIDEO
 309         default n
 310         ---help---
 311         Support for Hitachi tx18d42vm LVDS LCD panels, these panels have a
 312         lcd controller which needs to be initialized over SPI, once that is
 313         done they work like a regular LVDS panel.
 314
 315 config VIDEO_LCD_SPI_CS
 316         string "SPI CS pin for LCD related config job"
 317         depends on VIDEO_LCD_SSD2828 || VIDEO_LCD_HITACHI_TX18D42VM
 318         default ""
 319         ---help---
 320         This is one of the SPI communication pins, involved in setting up a
 321         working LCD configuration. The exact role of SPI may differ for
 322         different hardware setups. The option takes a string in the format
 323         understood by 'name_to_gpio' function, e.g. PH1 for pin 1 of port H.
 324
 325 config VIDEO_LCD_SPI_SCLK
 326         string "SPI SCLK pin for LCD related config job"
 327         depends on VIDEO_LCD_SSD2828 || VIDEO_LCD_HITACHI_TX18D42VM
 328         default ""
 329         ---help---
 330         This is one of the SPI communication pins, involved in setting up a
 331         working LCD configuration. The exact role of SPI may differ for
 332         different hardware setups. The option takes a string in the format
 333         understood by 'name_to_gpio' function, e.g. PH1 for pin 1 of port H.
 334
 335 config VIDEO_LCD_SPI_MOSI
 336         string "SPI MOSI pin for LCD related config job"
 337         depends on VIDEO_LCD_SSD2828 || VIDEO_LCD_HITACHI_TX18D42VM
 338         default ""
 339         ---help---
 340         This is one of the SPI communication pins, involved in setting up a
 341         working LCD configuration. The exact role of SPI may differ for
 342         different hardware setups. The option takes a string in the format
 343         understood by 'name_to_gpio' function, e.g. PH1 for pin 1 of port H.
 344
 345 config VIDEO_LCD_SPI_MISO
 346         string "SPI MISO pin for LCD related config job (optional)"
 347         depends on VIDEO_LCD_SSD2828
 348         default ""
 349         ---help---
 350         This is one of the SPI communication pins, involved in setting up a
 351         working LCD configuration. The exact role of SPI may differ for
 352         different hardware setups. If wired up, this pin may provide additional
 353         useful functionality. Such as bi-directional communication with the
 354         hardware and LCD panel id retrieval (if the panel can report it). The
 355         option takes a string in the format understood by 'name_to_gpio'
 356         function, e.g. PH1 for pin 1 of port H.
 357
 358 config VIDEO_MVEBU
 359         bool "Armada XP LCD controller"
 360         default n
 361         ---help---
 362         Support for the LCD controller integrated in the Marvell
 363         Armada XP SoC.
 364
 365 config I2C_EDID
 366         bool "Enable EDID library"
 367         depends on DM_I2C
 368         default n
 369         help
 370            This enables library for accessing EDID data from an LCD panel.
 371
 372 config DISPLAY
 373         bool "Enable Display support"
 374         depends on DM
 375         default n
 376         select I2C_EDID
 377         help
 378            This supports drivers that provide a display, such as eDP (Embedded
 379            DisplayPort) and HDMI (High Definition Multimedia Interface).
 380            The devices provide a simple interface to start up the display,
 381            read display information and enable it.
 382
 383 config ATMEL_HLCD
 384         bool "Enable ATMEL video support using HLCDC"
 385         depends on DM_VIDEO
 386         help
 387            HLCDC supports video output to an attached LCD panel.
 388
 389 config VIDEO_BROADWELL_IGD
 390         bool "Enable Intel Broadwell integrated graphics device"
 391         depends on X86
 392         help
 393           This enables support for integrated graphics on Intel broadwell
 394           devices. Initialisation is mostly performed by a VGA boot ROM, with
 395           some setup handled by U-Boot itself. The graphics adaptor works as
 396           a VESA device and supports LCD panels, eDP and LVDS outputs.
 397           Configuration of most aspects of device operation is performed using
 398           a special tool which configures the VGA ROM, but the graphics
 399           resolution can be selected in U-Boot.
 400
 401 config VIDEO_IVYBRIDGE_IGD
 402         bool "Enable Intel Ivybridge integration graphics support"
 403         depends on X86
 404         help
 405           This enables support for integrated graphics on Intel ivybridge
 406           devices. Initialisation is mostly performed by a VGA boot ROM, with
 407           some setup handled by U-Boot itself. The graphics adaptor works as
 408           a VESA device and supports LCD panels, eDP and LVDS outputs.
 409           Configuration of most aspects of device operation is performed using
 410           a special tool which configures the VGA ROM, but the graphics
 411           resolution can be selected in U-Boot.
 412
 413 config VIDEO_FSL_DCU_FB
 414         bool "Enable Freescale Display Control Unit"
 415         depends on VIDEO
 416         help
 417          This enables support for Freescale Display Control Unit (DCU4)
 418          module found on Freescale Vybrid and QorIQ family of SoCs.
 419
 420 config VIDEO_FSL_DCU_MAX_FB_SIZE_MB
 421         int "Freescale DCU framebuffer size"
 422         depends on VIDEO_FSL_DCU_FB
 423         default 4194304
 424         help
 425          Set maximum framebuffer size to be used for Freescale Display
 426          Controller Unit (DCU4).
 427
 428 source "drivers/video/rockchip/Kconfig"
 429
 430 config VIDEO_SANDBOX_SDL
 431         bool "Enable sandbox video console using SDL"
 432         depends on SANDBOX
 433         help
 434           When using sandbox you can enable an emulated LCD display which
 435           appears as an SDL (Simple DirectMedia Layer) window. This is a
 436           console device and can display stdout output. Within U-Boot is is
 437           a normal bitmap display and can display images as well as text.
 438
 439 config VIDEO_TEGRA20
 440         bool "Enable LCD support on Tegra20"
 441         depends on OF_CONTROL
 442         help
 443            Tegra20 supports video output to an attached LCD panel as well as
 444            other options such as HDMI. Only the LCD is supported in U-Boot.
 445            This option enables this support which can be used on devices which
 446            have an LCD display connected.
 447
 448 config VIDEO_TEGRA124
 449         bool "Enable video support on Tegra124"
 450         depends on DM_VIDEO
 451         help
 452            Tegra124 supports many video output options including eDP and
 453            HDMI. At present only eDP is supported by U-Boot. This option
 454            enables this support which can be used on devices which
 455            have an eDP display connected.
 456
 457 source "drivers/video/bridge/Kconfig"
 458
 459 config VIDEO
 460         bool "Enable legacy video support"
 461         depends on !DM_VIDEO
 462         help
 463           Define this for video support, without using driver model. Some
 464           drivers use this because they are not yet converted to driver
 465           model. Video drivers typically provide a colour text console and
 466           cursor.
 467
 468 config VIDEO_IPUV3
 469         bool "i.MX IPUv3 Core video support"
 470         depends on VIDEO && MX6
 471         help
 472           This enables framebuffer driver for i.MX processors working
 473           on the IPUv3(Image Processing Unit) internal graphic processor.
 474
 475 config CFB_CONSOLE
 476         bool "Enable colour frame buffer console"
 477         depends on VIDEO
 478         default y if VIDEO
 479         help
 480           Enables the colour frame buffer driver. This supports colour
 481           output on a bitmap display from an in-memory frame buffer.
 482           Several colour devices are supported along with various options to
 483           adjust the supported features. The driver is implemented in
 484           cfb_console.c
 485
 486           The following defines are needed (cf. smiLynxEM, i8042)
 487                 VIDEO_FB_LITTLE_ENDIAN  graphic memory organisation
 488                                         (default big endian)
 489                 VIDEO_HW_RECTFILL       graphic chip supports
 490                                         rectangle fill (cf. smiLynxEM)
 491                 VIDEO_HW_BITBLT         graphic chip supports
 492                                         bit-blit (cf. smiLynxEM)
 493                 VIDEO_VISIBLE_COLS      visible pixel columns (cols=pitch)
 494                 VIDEO_VISIBLE_ROWS      visible pixel rows
 495                 VIDEO_PIXEL_SIZE        bytes per pixel
 496                 VIDEO_DATA_FORMAT       graphic data format
 497                                         (0-5, cf. cfb_console.c)
 498                 VIDEO_FB_ADRS           framebuffer address
 499                 VIDEO_KBD_INIT_FCT      keyboard int fct (i.e. rx51_kp_init())
 500                 VIDEO_TSTC_FCT          test char fct (i.e. rx51_kp_tstc)
 501                 VIDEO_GETC_FCT          get char fct (i.e. rx51_kp_getc)
 502                 CONFIG_VIDEO_LOGO       display Linux logo in upper left corner
 503                 CONFIG_VIDEO_BMP_LOGO   use bmp_logo.h instead of linux_logo.h
 504                                         for logo. Requires CONFIG_VIDEO_LOGO
 505                 CONFIG_CONSOLE_EXTRA_INFO
 506                                         additional board info beside
 507                                         the logo
 508                 CONFIG_HIDE_LOGO_VERSION
 509                                         do not display bootloader
 510                                         version string
 511
 512           When CONFIG_CFB_CONSOLE is defined, the video console is the
 513           default console. The serial console can be forced by setting the
 514           environment 'console=serial'.
 515
 516 config CFB_CONSOLE_ANSI
 517         bool "Support ANSI escape sequences"
 518         depends on CFB_CONSOLE
 519         help
 520           This allows the colour buffer frame buffer driver to support
 521           a limited number of ANSI escape sequences (cursor control,
 522           erase functions and limited graphics rendition control). Normal
 523           output from U-Boot will pass through this filter.
 524
 525 config VGA_AS_SINGLE_DEVICE
 526         bool "Set the video as an output-only device"
 527         depends on CFB_CONSOLE
 528         default y
 529         help
 530           If enable the framebuffer device will be initialized as an
 531           output-only device. The Keyboard driver will not be set up. This
 532           may be used if you have no keyboard device, or more than one
 533           (USB Keyboard, AT Keyboard).
 534
 535 config VIDEO_SW_CURSOR
 536         bool "Enable a software cursor"
 537         depends on CFB_CONSOLE
 538         default y if CFB_CONSOLE
 539         help
 540           This draws a cursor after the last character. No blinking is
 541           provided. This makes it possible to see the current cursor
 542           position when entering text on the console. It is recommended to
 543           enable this.
 544
 545 config CONSOLE_EXTRA_INFO
 546         bool "Display additional board information"
 547         depends on CFB_CONSOLE
 548         help
 549           Display additional board information strings that normally go to
 550           the serial port. When this option is enabled, a board-specific
 551           function video_get_info_str() is called to get the string for
 552           each line of the display. The function should return the string,
 553           which can be empty if there is nothing to display for that line.
 554
 555 config CONSOLE_SCROLL_LINES
 556         int "Number of lines to scroll the console by"
 557         depends on CFB_CONSOLE || DM_VIDEO || LCD
 558         default 1
 559         help
 560           When the console need to be scrolled, this is the number of
 561           lines to scroll by. It defaults to 1. Increasing this makes the
 562           console jump but can help speed up operation when scrolling
 563           is slow.
 564
 565 config SYS_CONSOLE_BG_COL
 566         hex "Background colour"
 567         depends on CFB_CONSOLE
 568         default 0x00
 569         help
 570           Defines the background colour for the console. The value is from
 571           0x00 to 0xff and the meaning depends on the graphics card.
 572           Typically, 0x00 means black and 0xff means white. Do not set
 573           the background and foreground to the same colour or you will see
 574           nothing.
 575
 576 config SYS_CONSOLE_FG_COL
 577         hex "Foreground colour"
 578         depends on CFB_CONSOLE
 579         default 0xa0
 580         help
 581           Defines the foreground colour for the console. The value is from
 582           0x00 to 0xff and the meaning depends on the graphics card.
 583           Typically, 0x00 means black and 0xff means white. Do not set
 584           the background and foreground to the same colour or you will see
 585           nothing.
 586
 587 config LCD
 588         bool "Enable legacy LCD support"
 589         help
 590           Define this to enable LCD support (for output to LCD display).
 591           You will also need to select an LCD driver using an additional
 592           CONFIG option. See the README for details. Drives which have been
 593           converted to driver model will instead used CONFIG_DM_VIDEO.
 594
 595 config VIDEO_DW_HDMI
 596         bool
 597         help
 598           Enables the common driver code for the Designware HDMI TX
 599           block found in SoCs from various vendors.
 600           As this does not provide any functionality by itself (but
 601           rather requires a SoC-specific glue driver to call it), it
 602           can not be enabled from the configuration menu.
 603
 604 endmenu