bb6c4507fe
As a result of the recent Kconfig reworks, the default settings for the framebuffer interfaces changed in unexpected ways: Configurations that leave CONFIG_FB disabled but use DRM now get DRM_FBDEV_EMULATION by default. This also turns on the deprecated /dev/fb device nodes for machines that don't actually want it. In turn, configurations that previously had DRM_FBDEV_EMULATION enabled now only get the /dev/fb front-end but not the more useful framebuffer console, which is not selected any more. We had previously decided that any combination of the three frontends (FB_DEVICE, FRAMEBUFFER_CONSOLE and LOGO) should be selectable, but the new default settings mean that a lot of defconfig files would have to get adapted. Change the defaults back to what they were in Linux 6.5: - Leave DRM_FBDEV_EMULATION turned off unless CONFIG_FB is enabled. Previously this was a hard dependency but now the two are independent. However, configurations that enable CONFIG_FB probably also want to keep the emulation for DRM, while those without FB presumably did that intentionally in the past. - Leave FB_DEVICE turned off for FB=n. Following the same logic, the deprecated option should not automatically get enabled here, most users that had FB turned off in the past do not want it, even if they want the console - Turn the FRAMEBUFFER_CONSOLE option on if DRM_FBDEV_EMULATION is set to avoid having to change defconfig files that relied on it being selected unconditionally in the past. This also makes sense since both LOGO and FB_DEVICE are now disabled by default for builds without CONFIG_FB, but DRM_FBDEV_EMULATION would make no sense if all three are disabled. Fixes:a5ae331edb("drm: Drop select FRAMEBUFFER_CONSOLE for DRM_FBDEV_EMULATION") Fixes:701d2054fa("fbdev: Make support for userspace interfaces configurable") Reported-by: Geert Uytterhoeven <geert@linux-m68k.org> Signed-off-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be> Acked-by: Thomas Zimmermann <tzimmermann@suse.de> Signed-off-by: Javier Martinez Canillas <javierm@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/20230911205338.2385278-1-arnd@kernel.org
5.0 KiB
SPDX-License-Identifier: GPL-2.0-only
Video configuration
menu "Console display driver support"
config VGA_CONSOLE
bool "VGA text console" if EXPERT || !X86
depends on !4xx && !PPC_8xx && !SPARC && !M68K && !PARISC && !SUPERH &&
(!ARM || ARCH_FOOTBRIDGE || ARCH_INTEGRATOR || ARCH_NETWINDER) &&
!ARM64 && !ARC && !MICROBLAZE && !OPENRISC && !S390 && !UML
select APERTURE_HELPERS if (DRM || FB || VFIO_PCI_CORE)
default y
help
Saying Y here will allow you to use Linux in text mode through a
display that complies with the generic VGA standard. Virtually
everyone wants that.
The program SVGATextMode can be used to utilize SVGA video cards to
their full potential in text mode. Download it from
<ftp://ibiblio.org/pub/Linux/utils/console/>.
Say Y.
config MDA_CONSOLE depends on !M68K && !PARISC && ISA tristate "MDA text console (dual-headed)" help Say Y here if you have an old MDA or monochrome Hercules graphics adapter in your system acting as a second head ( = video card). You will then be able to use two monitors with your Linux system. Do not say Y here if your MDA card is the primary card in your system; the normal VGA driver will handle it.
To compile this driver as a module, choose M here: the
module will be called mdacon.
If unsure, say N.
config SGI_NEWPORT_CONSOLE tristate "SGI Newport Console support" depends on SGI_IP22 && HAS_IOMEM select FONT_SUPPORT help Say Y here if you want the console on the Newport aka XL graphics card of your Indy. Most people say Y here.
config DUMMY_CONSOLE bool default y
config DUMMY_CONSOLE_COLUMNS int "Initial number of console screen columns" depends on DUMMY_CONSOLE && !ARM default 160 if PARISC default 80 help On PA-RISC, the default value is 160, which should fit a 1280x1024 monitor. Select 80 if you use a 640x480 resolution by default.
config DUMMY_CONSOLE_ROWS int "Initial number of console screen rows" depends on DUMMY_CONSOLE && !ARM default 64 if PARISC default 25 help On PA-RISC, the default value is 64, which should fit a 1280x1024 monitor. Select 25 if you use a 640x480 resolution by default.
config FRAMEBUFFER_CONSOLE bool "Framebuffer Console support" depends on FB_CORE && !UML default DRM_FBDEV_EMULATION select VT_HW_CONSOLE_BINDING select CRC32 select FONT_SUPPORT help Low-level framebuffer-based console driver.
config FRAMEBUFFER_CONSOLE_LEGACY_ACCELERATION bool "Enable legacy fbcon hardware acceleration code" depends on FRAMEBUFFER_CONSOLE default y if PARISC default n help This option enables the fbcon (framebuffer text-based) hardware acceleration for graphics drivers which were written for the fbdev graphics interface.
On modern machines, on mainstream machines (like x86-64) or when
using a modern Linux distribution those fbdev drivers usually aren't used.
So enabling this option wouldn't have any effect, which is why you want
to disable this option on such newer machines.
If you compile this kernel for older machines which still require the
fbdev drivers, you may want to say Y.
If unsure, select n.
config FRAMEBUFFER_CONSOLE_DETECT_PRIMARY bool "Map the console to the primary display device" depends on FRAMEBUFFER_CONSOLE default n help If this option is selected, the framebuffer console will automatically select the primary display device (if the architecture supports this feature). Otherwise, the framebuffer console will always select the first framebuffer driver that is loaded. The latter is the default behavior.
You can always override the automatic selection of the primary device
by using the fbcon=map: boot option.
If unsure, select n.
config FRAMEBUFFER_CONSOLE_ROTATION bool "Framebuffer Console Rotation" depends on FRAMEBUFFER_CONSOLE help Enable display rotation for the framebuffer console. This is done in software and may be significantly slower than a normally oriented display. Note that the rotation is done at the console level only such that other users of the framebuffer will remain normally oriented.
config FRAMEBUFFER_CONSOLE_DEFERRED_TAKEOVER bool "Framebuffer Console Deferred Takeover" depends on FB=y && FRAMEBUFFER_CONSOLE && DUMMY_CONSOLE help If enabled this defers the framebuffer console taking over the console from the dummy console until the first text is displayed on the console. This is useful in combination with the "quiet" kernel commandline option to keep the framebuffer contents initially put up by the firmware in place, rather then replacing the contents with a black screen as soon as fbcon loads.
config STI_CONSOLE bool "STI text console" depends on PARISC && HAS_IOMEM select FONT_SUPPORT select CRC32 select STI_CORE default y help The STI console is the builtin display/keyboard on HP-PARISC machines. Say Y here to build support for it into your kernel. The alternative is to use your primary serial port as a console.
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