2 ## This file is part of the coreboot project.
4 ## SPDX-License-Identifier: GPL-2.0-only
8 config HAVE_VGA_TEXT_FRAMEBUFFER
10 depends on !NO_GFX_INIT
12 Selected by graphics drivers that support legacy VGA text mode.
14 config HAVE_VBE_LINEAR_FRAMEBUFFER
16 depends on !NO_GFX_INIT
18 Selected by graphics drivers that can set up a VBE linear-framebuffer
21 config HAVE_LINEAR_FRAMEBUFFER
23 depends on !NO_GFX_INIT
25 Selected by graphics drivers that can set up a generic linear
31 Selected by drivers that support to run a blob that implements
32 the Graphics Output Protocol (GOP).
34 config MAINBOARD_NO_FSP_GOP
37 Selected by mainboards that do not have any graphics ports connected to the SoC.
39 config MAINBOARD_HAS_NATIVE_VGA_INIT
42 Selected by mainboards / drivers that provide native graphics
45 config MAINBOARD_FORCE_NATIVE_VGA_INIT
47 depends on MAINBOARD_HAS_NATIVE_VGA_INIT || MAINBOARD_HAS_LIBGFXINIT
49 Selected by mainboards / chipsets whose graphics driver can't or
50 shouldn't be disabled.
52 config MAINBOARD_HAS_LIBGFXINIT
55 Selected by mainboards that implement support for `libgfxinit`.
56 Usually this requires a list of ports to be probed for displays.
59 prompt "Graphics initialization"
60 default NO_GFX_INIT if VGA_BIOS && PAYLOAD_SEABIOS
61 default VGA_ROM_RUN if VGA_BIOS
62 default MAINBOARD_DO_NATIVE_VGA_INIT
63 default MAINBOARD_USE_LIBGFXINIT
64 default RUN_FSP_GOP if INTEL_GMA_HAVE_VBT
66 config MAINBOARD_DO_NATIVE_VGA_INIT
67 bool "Use native graphics init"
68 depends on MAINBOARD_HAS_NATIVE_VGA_INIT
70 Some mainboards, such as the Google Link, allow initializing the
71 display without the need of a binary only VGA OPROM. Enabling this
72 option may be faster, but also lacks flexibility in setting modes.
74 config MAINBOARD_USE_LIBGFXINIT
76 depends on MAINBOARD_HAS_LIBGFXINIT
77 select HAVE_VGA_TEXT_FRAMEBUFFER
78 select HAVE_LINEAR_FRAMEBUFFER
79 select VGA if VGA_TEXT_FRAMEBUFFER
81 Use the SPARK library `libgfxinit` for the native graphics
82 initialization. This requires an Ada toolchain.
84 # TODO: Explain differences (if any) for onboard cards.
86 bool "Run VGA Option ROMs"
87 depends on PCI && (ARCH_X86 || ARCH_PPC64) && !MAINBOARD_FORCE_NATIVE_VGA_INIT
88 select HAVE_VGA_TEXT_FRAMEBUFFER
90 Execute VGA Option ROMs in coreboot if found. This can be used
91 to enable PCI/AGP/PCI-E video cards when not using a SeaBIOS
94 When using a SeaBIOS payload it runs all option ROMs with much
95 more complete BIOS interrupt services available than coreboot,
96 which some option ROMs require in order to function correctly.
99 bool "Run a GOP driver"
100 depends on HAVE_FSP_GOP && !MAINBOARD_NO_FSP_GOP
101 select HAVE_LINEAR_FRAMEBUFFER
103 Some platforms (e.g. Intel Braswell and Skylake/Kaby Lake) support
104 to run a GOP blob. This option enables graphics initialization with
109 depends on !MAINBOARD_FORCE_NATIVE_VGA_INIT
111 Select this to not perform any graphics initialization in
112 coreboot. This is useful if the payload (e.g. SeaBIOS) can
113 initialize graphics or if pre-boot graphics are not required.
117 config ONBOARD_VGA_IS_PRIMARY
118 bool "Use onboard VGA as primary video device"
122 This option lets you select which VGA device will be used
123 to decode legacy VGA cycles. Not all chipsets implement this
124 however. If not selected, the last adapter found will be used,
125 else the onboard adapter is used.
127 config S3_VGA_ROM_RUN
128 bool "Re-run VGA Option ROMs on S3 resume"
130 depends on VGA_ROM_RUN && HAVE_ACPI_RESUME
132 Execute VGA Option ROMs in coreboot when resuming from S3 suspend.
134 When using a SeaBIOS payload it runs all option ROMs with much
135 more complete BIOS interrupt services available than coreboot,
136 which some option ROMs require in order to function correctly.
138 If unsure, say N when using SeaBIOS as payload, Y otherwise.
140 config ALWAYS_LOAD_OPROM
142 depends on VGA_ROM_RUN
144 Always load option ROMs if any are found. The decision to run
145 the ROM is still determined at runtime, but the distinction
146 between loading and not running comes into play for CHROMEOS.
148 An example where this is required is that VBT (Video BIOS Tables)
149 are needed for the kernel's display driver to know how a piece of
150 hardware is configured to be used.
152 config ALWAYS_RUN_OPROM
154 depends on VGA_ROM_RUN && ALWAYS_LOAD_OPROM
156 Always uncondtionally run the option regardless of other
159 config ON_DEVICE_ROM_LOAD
160 bool "Load Option ROMs on PCI devices"
161 default n if PAYLOAD_SEABIOS
162 default y if !PAYLOAD_SEABIOS
163 depends on VGA_ROM_RUN
165 Load Option ROMs stored on PCI/PCIe/AGP VGA devices in coreboot.
167 If disabled, only Option ROMs stored in CBFS will be executed by
168 coreboot. If you are concerned about security, you might want to
169 disable this option, but it might leave your system in a state of
170 degraded functionality.
172 When using a SeaBIOS payload it runs all option ROMs with much
173 more complete BIOS interrupt services available than coreboot,
174 which some option ROMs require in order to function correctly.
176 If unsure, say N when using SeaBIOS as payload, Y otherwise.
179 prompt "Option ROM execution type"
180 default PCI_OPTION_ROM_RUN_YABEL if !ARCH_X86
181 default PCI_OPTION_ROM_RUN_REALMODE if ARCH_X86
182 depends on VGA_ROM_RUN
184 config PCI_OPTION_ROM_RUN_REALMODE
189 If you select this option, PCI Option ROMs will be executed
190 natively on the CPU in real mode. No CPU emulation is involved,
191 so this is the fastest, but also the least secure option.
192 (only works on x86/x64 systems)
194 config PCI_OPTION_ROM_RUN_YABEL
198 If you select this option, the x86emu CPU emulator will be used to
199 execute PCI Option ROMs.
201 This option prevents Option ROMs from doing dirty tricks with the
202 system (such as installing SMM modules or hypervisors), but it is
203 also significantly slower than the native Option ROM initialization
206 This is the default choice for non-x86 systems.
210 config YABEL_PCI_ACCESS_OTHER_DEVICES
211 prompt "Allow Option ROMs to access other devices"
213 depends on PCI_OPTION_ROM_RUN_YABEL
215 Per default, YABEL only allows Option ROMs to access the PCI device
216 that they are associated with. However, this causes trouble for some
217 onboard graphics chips whose Option ROM needs to reconfigure the
220 config YABEL_PCI_FAKE_WRITING_OTHER_DEVICES_CONFIG
221 prompt "Fake success on writing other device's config space"
223 depends on YABEL_PCI_ACCESS_OTHER_DEVICES
225 By default, YABEL aborts when the Option ROM tries to write to other
226 devices' config spaces. With this option enabled, the write doesn't
227 follow through, but the Option ROM is allowed to go on.
228 This can create issues such as hanging Option ROMs (if it depends on
229 that other register changing to the written value), so test for
230 impact before using this option.
232 config YABEL_VIRTMEM_LOCATION
233 prompt "Location of YABEL's virtual memory"
235 depends on PCI_OPTION_ROM_RUN_YABEL
238 YABEL requires 1MB memory for its CPU emulation. This memory is
239 normally located at 16MB.
241 config YABEL_DIRECTHW
242 prompt "Direct hardware access"
244 depends on PCI_OPTION_ROM_RUN_YABEL && ARCH_X86
246 YABEL consists of two parts: It uses x86emu for the CPU emulation and
247 additionally provides a PC system emulation that filters bad device
248 and memory access (such as PCI config space access to other devices
249 than the initialized one).
251 When choosing this option, x86emu will pass through all hardware
252 accesses to memory and I/O devices to the underlying memory and I/O
253 addresses. While this option prevents Option ROMs from doing dirty
254 tricks with the CPU (such as installing SMM modules or hypervisors),
255 they can still access all devices in the system.
256 Enable this option for a good compromise between security and speed.
258 config MULTIPLE_VGA_ADAPTERS
263 depends on HAVE_VGA_TEXT_FRAMEBUFFER || HAVE_LINEAR_FRAMEBUFFER
265 config FRAMEBUFFER_SET_VESA_MODE
266 prompt "Set framebuffer graphics resolution"
268 default y if CHROMEOS
269 depends on PCI_OPTION_ROM_RUN_YABEL || PCI_OPTION_ROM_RUN_REALMODE
270 select HAVE_VBE_LINEAR_FRAMEBUFFER
272 Set VESA/native framebuffer mode (needed for bootsplash and graphical framebuffer console)
274 if FRAMEBUFFER_SET_VESA_MODE
277 prompt "framebuffer graphics resolution"
278 default FRAMEBUFFER_VESA_MODE_118
280 This option sets the resolution used for the coreboot framebuffer (and
283 config FRAMEBUFFER_VESA_MODE_100
284 bool "640x400 256-color"
286 config FRAMEBUFFER_VESA_MODE_101
287 bool "640x480 256-color"
289 config FRAMEBUFFER_VESA_MODE_102
290 bool "800x600 16-color"
292 config FRAMEBUFFER_VESA_MODE_103
293 bool "800x600 256-color"
295 config FRAMEBUFFER_VESA_MODE_104
296 bool "1024x768 16-color"
298 config FRAMEBUFFER_VESA_MODE_105
299 bool "1024x768 256-color"
301 config FRAMEBUFFER_VESA_MODE_106
302 bool "1280x1024 16-color"
304 config FRAMEBUFFER_VESA_MODE_107
305 bool "1280x1024 256-color"
307 config FRAMEBUFFER_VESA_MODE_108
310 config FRAMEBUFFER_VESA_MODE_109
313 config FRAMEBUFFER_VESA_MODE_10A
316 config FRAMEBUFFER_VESA_MODE_10B
319 config FRAMEBUFFER_VESA_MODE_10C
322 config FRAMEBUFFER_VESA_MODE_10D
323 bool "320x200 32k-color (1:5:5:5)"
325 config FRAMEBUFFER_VESA_MODE_10E
326 bool "320x200 64k-color (5:6:5)"
328 config FRAMEBUFFER_VESA_MODE_10F
329 bool "320x200 16.8M-color (8:8:8)"
331 config FRAMEBUFFER_VESA_MODE_110
332 bool "640x480 32k-color (1:5:5:5)"
334 config FRAMEBUFFER_VESA_MODE_111
335 bool "640x480 64k-color (5:6:5)"
337 config FRAMEBUFFER_VESA_MODE_112
338 bool "640x480 16.8M-color (8:8:8)"
340 config FRAMEBUFFER_VESA_MODE_113
341 bool "800x600 32k-color (1:5:5:5)"
343 config FRAMEBUFFER_VESA_MODE_114
344 bool "800x600 64k-color (5:6:5)"
346 config FRAMEBUFFER_VESA_MODE_115
347 bool "800x600 16.8M-color (8:8:8)"
349 config FRAMEBUFFER_VESA_MODE_116
350 bool "1024x768 32k-color (1:5:5:5)"
352 config FRAMEBUFFER_VESA_MODE_117
353 bool "1024x768 64k-color (5:6:5)"
355 config FRAMEBUFFER_VESA_MODE_118
356 bool "1024x768 16.8M-color (8:8:8)"
358 config FRAMEBUFFER_VESA_MODE_119
359 bool "1280x1024 32k-color (1:5:5:5)"
361 config FRAMEBUFFER_VESA_MODE_11A
362 bool "1280x1024 64k-color (5:6:5)"
364 config FRAMEBUFFER_VESA_MODE_11B
365 bool "1280x1024 16.8M-color (8:8:8)"
367 config FRAMEBUFFER_VESA_MODE_USER
368 bool "Manually select VESA mode"
372 # Map the config names to an integer (KB).
373 config FRAMEBUFFER_VESA_MODE
374 prompt "VESA mode" if FRAMEBUFFER_VESA_MODE_USER
376 default 0x100 if FRAMEBUFFER_VESA_MODE_100
377 default 0x101 if FRAMEBUFFER_VESA_MODE_101
378 default 0x102 if FRAMEBUFFER_VESA_MODE_102
379 default 0x103 if FRAMEBUFFER_VESA_MODE_103
380 default 0x104 if FRAMEBUFFER_VESA_MODE_104
381 default 0x105 if FRAMEBUFFER_VESA_MODE_105
382 default 0x106 if FRAMEBUFFER_VESA_MODE_106
383 default 0x107 if FRAMEBUFFER_VESA_MODE_107
384 default 0x108 if FRAMEBUFFER_VESA_MODE_108
385 default 0x109 if FRAMEBUFFER_VESA_MODE_109
386 default 0x10A if FRAMEBUFFER_VESA_MODE_10A
387 default 0x10B if FRAMEBUFFER_VESA_MODE_10B
388 default 0x10C if FRAMEBUFFER_VESA_MODE_10C
389 default 0x10D if FRAMEBUFFER_VESA_MODE_10D
390 default 0x10E if FRAMEBUFFER_VESA_MODE_10E
391 default 0x10F if FRAMEBUFFER_VESA_MODE_10F
392 default 0x110 if FRAMEBUFFER_VESA_MODE_110
393 default 0x111 if FRAMEBUFFER_VESA_MODE_111
394 default 0x112 if FRAMEBUFFER_VESA_MODE_112
395 default 0x113 if FRAMEBUFFER_VESA_MODE_113
396 default 0x114 if FRAMEBUFFER_VESA_MODE_114
397 default 0x115 if FRAMEBUFFER_VESA_MODE_115
398 default 0x116 if FRAMEBUFFER_VESA_MODE_116
399 default 0x117 if FRAMEBUFFER_VESA_MODE_117
400 default 0x118 if FRAMEBUFFER_VESA_MODE_118
401 default 0x119 if FRAMEBUFFER_VESA_MODE_119
402 default 0x11A if FRAMEBUFFER_VESA_MODE_11A
403 default 0x11B if FRAMEBUFFER_VESA_MODE_11B
404 default 0x118 if FRAMEBUFFER_VESA_MODE_USER
405 endif # FRAMEBUFFER_SET_VESA_MODE
408 prompt "Framebuffer mode"
409 default VBE_LINEAR_FRAMEBUFFER if HAVE_VBE_LINEAR_FRAMEBUFFER && CHROMEOS
410 default GENERIC_LINEAR_FRAMEBUFFER if HAVE_LINEAR_FRAMEBUFFER && CHROMEOS
411 default VBE_LINEAR_FRAMEBUFFER if HAVE_VBE_LINEAR_FRAMEBUFFER && PAYLOAD_TIANOCORE
412 default GENERIC_LINEAR_FRAMEBUFFER if HAVE_LINEAR_FRAMEBUFFER && PAYLOAD_TIANOCORE
413 default VGA_TEXT_FRAMEBUFFER
415 config VGA_TEXT_FRAMEBUFFER
416 bool "Legacy VGA text mode"
417 depends on HAVE_VGA_TEXT_FRAMEBUFFER
419 If this option is enabled, coreboot will initialize graphics in
420 legacy VGA text mode or, if a VGA BIOS is used and a VESA mode set,
421 switch to text mode before handing control to a payload.
423 config VBE_LINEAR_FRAMEBUFFER
424 bool "VESA framebuffer"
425 depends on HAVE_VBE_LINEAR_FRAMEBUFFER
427 This option keeps the framebuffer mode set after coreboot finishes
428 execution. If this option is enabled, coreboot will pass a
429 framebuffer entry in its coreboot table and the payload will need a
432 config GENERIC_LINEAR_FRAMEBUFFER
433 bool "Linear \"high-resolution\" framebuffer"
434 depends on HAVE_LINEAR_FRAMEBUFFER
436 This option enables a high-resolution, linear framebuffer. If this
437 option is enabled, coreboot will pass a framebuffer entry in its
438 coreboot table and the payload will need a compatible driver.
442 # Workaround to have LINEAR_FRAMEBUFFER set in both cases
443 # VBE_LINEAR_FRAMEBUFFER and GENERIC_LINEAR_FRAMEBUFFER.
444 # `kconfig_lint` doesn't let us use the same name with
445 # different texts in the choice above.
446 config LINEAR_FRAMEBUFFER
448 depends on VBE_LINEAR_FRAMEBUFFER || GENERIC_LINEAR_FRAMEBUFFER
451 prompt "Show graphical bootsplash"
453 depends on LINEAR_FRAMEBUFFER
455 This option shows a graphical bootsplash screen. The graphics are
456 loaded from the CBFS file bootsplash.jpg.
458 You can either specify the location and file name of the
459 image in the 'General' section or add it manually to CBFS, using,
460 for example, cbfstool.
462 config LINEAR_FRAMEBUFFER_MAX_WIDTH
463 int "Maximum width in pixels"
464 depends on LINEAR_FRAMEBUFFER && MAINBOARD_USE_LIBGFXINIT
467 Set the maximum width of the framebuffer. This may help with
468 default fonts too tiny for high-resolution displays.
470 config LINEAR_FRAMEBUFFER_MAX_HEIGHT
471 int "Maximum height in pixels"
472 depends on LINEAR_FRAMEBUFFER && MAINBOARD_USE_LIBGFXINIT
475 Set the maximum height of the framebuffer. This may help with
476 default fonts too tiny for high-resolution displays.
486 config NO_MMCONF_SUPPORT
490 config MMCONF_SUPPORT
492 default !NO_MMCONF_SUPPORT
494 config HYPERTRANSPORT_PLUGIN_SUPPORT
498 config HT_CHAIN_UNITID_BASE
502 config HT_CHAIN_END_UNITID_BASE
506 config PCIX_PLUGIN_SUPPORT
510 config CARDBUS_PLUGIN_SUPPORT
514 config AZALIA_PLUGIN_SUPPORT
518 config PCIEXP_PLUGIN_SUPPORT
524 if PCIEXP_PLUGIN_SUPPORT
526 config PCIEXP_COMMON_CLOCK
527 prompt "Enable PCIe Common Clock"
531 Detect and enable Common Clock on PCIe links.
534 prompt "Enable PCIe ASPM"
538 Detect and enable ASPM (Active State Power Management) on PCIe links.
541 prompt "Enable PCIe Clock Power Management"
545 Detect and enable Clock Power Management on PCIe.
547 config PCIEXP_L1_SUB_STATE
548 prompt "Enable PCIe ASPM L1 SubState"
550 depends on (MMCONF_SUPPORT || PCI_IO_CFG_EXT)
553 Detect and enable ASPM on PCIe links.
555 config PCIEXP_HOTPLUG
556 prompt "Enable PCIe Hotplug Support"
560 Allocate resources for PCIe hotplug bridges
564 config PCIEXP_HOTPLUG_BUSES
565 int "PCI Express Hotplug Buses"
568 This is the number of buses allocated for hotplug PCI express
569 bridges, for use by hotplugged child devices. The default is 32
572 config PCIEXP_HOTPLUG_MEM
573 hex "PCI Express Hotplug Memory"
576 This is the amount of memory space, in bytes, to allocate to
577 hotplug PCI express bridges, for use by hotplugged child devices.
578 This size should be page-aligned. The default is 8 MiB.
580 config PCIEXP_HOTPLUG_PREFETCH_MEM
581 hex "PCI Express Hotplug Prefetch Memory"
584 This is the amount of pre-fetchable memory space, in bytes, to
585 allocate to hot-plug PCI express bridges, for use by hotplugged
586 child devices. This size should be page-aligned. The default is
589 config PCIEXP_HOTPLUG_IO
590 hex "PCI Express Hotplug I/O Space"
593 This is the amount of I/O space to allocate to hot-plug PCI
594 express bridges, for use by hotplugged child devices. The default
597 endif # PCIEXP_HOTPLUG
599 endif # PCIEXP_PLUGIN_SUPPORT
601 config EARLY_PCI_BRIDGE
602 bool "Early PCI bridge"
606 While coreboot is executing code from ROM, the coreboot resource
607 allocator has not been running yet. Hence PCI devices living behind
608 a bridge are not yet visible to the system.
610 This option enables static configuration for a single pre-defined
611 PCI bridge function on bus 0.
615 config EARLY_PCI_BRIDGE_DEVICE
619 config EARLY_PCI_BRIDGE_FUNCTION
620 hex "bridge function"
623 config EARLY_PCI_MMIO_BASE
624 hex "MMIO window base"
627 endif # EARLY_PCI_BRIDGE
629 config SUBSYSTEM_VENDOR_ID
630 hex "Override PCI Subsystem Vendor ID"
634 This config option will override the devicetree settings for
635 PCI Subsystem Vendor ID.
637 config SUBSYSTEM_DEVICE_ID
638 hex "Override PCI Subsystem Device ID"
642 This config option will override the devicetree settings for
643 PCI Subsystem Device ID.
646 bool "Add a VGA BIOS image"
649 Select this option if you have a VGA BIOS image that you would
650 like to add to your ROM.
652 You will be able to specify the location and file name of the
656 string "VGA BIOS path and filename"
658 default "vgabios.bin"
660 The path and filename of the file to use as VGA BIOS.
663 string "VGA device PCI IDs"
667 The comma-separated PCI vendor and device ID with optional revision if that
668 feature is enabled that would associate your vBIOS to your video card.
670 Example: 1106,3230 or 1106,3230,a3
672 In the above example 1106 is the PCI vendor ID (in hex, but without
673 the "0x" prefix) and 3230 specifies the PCI device ID of the
674 video card (also in hex, without "0x" prefix). a3 specifies the revision.
676 Under GNU/Linux you can run `lspci -nn` to list the IDs of your PCI devices.
678 config VGA_BIOS_SECOND
679 bool "Add a 2nd video BIOS image"
680 depends on ARCH_X86 && VGA_BIOS
682 Select this option if you have a 2nd video BIOS image that you would
683 like to add to your ROM.
685 config VGA_BIOS_SECOND_FILE
686 string "2nd video BIOS path and filename"
687 depends on VGA_BIOS_SECOND
690 The path and filename of the file to use as video BIOS.
692 config VGA_BIOS_SECOND_ID
693 string "Graphics device PCI IDs"
694 depends on VGA_BIOS_SECOND
696 The comma-separated PCI vendor and device ID with optional revision if that
697 feature is enabled that would associate your vBIOS to your video card.
699 Example: 1106,3230 or 1106,3230,a3
701 In the above example 1106 is the PCI vendor ID (in hex, but without
702 the "0x" prefix) and 3230 specifies the PCI device ID of the
703 video card (also in hex, without "0x" prefix). a3 specifies the revision.
705 Under GNU/Linux you can run `lspci -nn` to list the IDs of your PCI devices.
707 config CHECK_REV_IN_OPROM_NAME
710 Select this in the platform BIOS or chipset if the option rom has a revision
711 that needs to be checked when searching CBFS.
714 bool "Add a discrete VGA BIOS image"
717 Select this option if you have a VGA BIOS image for discrete GPU
718 that you would like to add to your ROM.
720 You will be able to specify the location and file name of the
723 config VGA_BIOS_DGPU_FILE
724 string "Discrete VGA BIOS path and filename"
725 depends on VGA_BIOS_DGPU
726 default "vgabios_dgpu.bin"
728 The path and filename of the file to use as VGA BIOS for discrete GPU.
730 config VGA_BIOS_DGPU_ID
731 string "Discrete VGA device PCI IDs"
732 depends on VGA_BIOS_DGPU
735 The comma-separated PCI vendor and device ID that would associate
736 your VGA BIOS to your discrete video card.
739 1002,6663 for HD 8570M
740 1002,6665 for R5 M230
742 In the above examples 1002 is the PCI vendor ID (in hex, but without
743 the "0x" prefix) and 6663 / 6665 specifies the PCI device ID of the
744 discrete video card (also in hex, without "0x" prefix).
746 Under GNU/Linux you can run `lspci -nn` to list the IDs of your PCI devices.
748 config INTEL_GMA_HAVE_VBT
751 Select this in the mainboard Kconfig to indicate the board has
754 config INTEL_GMA_ADD_VBT
755 depends on SOC_INTEL_COMMON || CPU_INTEL_COMMON
756 bool "Add a Video BIOS Table (VBT) binary to CBFS"
757 default y if INTEL_GMA_HAVE_VBT
759 Add a VBT data file to CBFS. The VBT describes the integrated
760 GPU and connections, and is needed by the GOP driver integrated into
761 FSP and the OS driver in order to initialize the display.
763 config INTEL_GMA_VBT_FILE
764 string "VBT binary path and filename"
765 depends on INTEL_GMA_ADD_VBT
766 default "src/mainboard/$(MAINBOARDDIR)/variants/$(VARIANT_DIR)/data.vbt" \
767 if INTEL_GMA_HAVE_VBT && VARIANT_DIR != ""
768 default "src/mainboard/$(MAINBOARDDIR)/data.vbt" if INTEL_GMA_HAVE_VBT
769 default "3rdparty/blobs/mainboard/$(MAINBOARDDIR)/vbt.bin"
771 The path and filename of the VBT binary.
774 bool "Enable I2C controller emulation in software"
777 This config option will enable code to override the i2c_transfer
778 routine with a (simple) software emulation of the protocol. This may
779 be useful for debugging or on platforms where a driver for the real
780 I2C controller is not (yet) available. The platform code needs to
781 provide bindings to manually toggle I2C lines.