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Date: Mon, 24 Jul 2006 10:53:22 -0600 From: "Jordan Crouse" <jordan.crouse@....com> To: akpm@...l.org cc: linux-kernel@...r.kernel.org, blizzard@...hat.com, dwmw2@...hat.com Subject: [PATCH 2/2] [PATCH] Add a configuration option to avoid automatically probing VGA From: Jordan Crouse <jordan.crouse@....com> Some x86 implementations don't have a built in VGA / VESA BIOS. This configuration option (enabled when EMBEDDED is selected), allows us to avoid probing the VGA hardware during boot. This option also disables the VGA console option, which depends heavily on the VGA / VESA probing. Signed-off-by: Jordan Crouse <jordan.crouse@....com> --- arch/i386/Kconfig | 9 +++++++++ arch/i386/boot/setup.S | 5 +++++ drivers/video/Kconfig | 6 +++--- drivers/video/console/Kconfig | 4 ++-- 4 files changed, 19 insertions(+), 5 deletions(-) diff --git a/arch/i386/Kconfig b/arch/i386/Kconfig index daa75ce..d8935d9 100644 --- a/arch/i386/Kconfig +++ b/arch/i386/Kconfig @@ -735,6 +735,15 @@ config SECCOMP If unsure, say Y. Only embedded should say N here. +config VGA_NOPROBE + bool "Don't probe VGA at boot" if EMBEDDED + default n + help + Saying Y here will cause the kernel to not probe VGA at boot time. + This will break everything that depends on the probed screen + data. Say N here unless you are absolutely sure this is what you + want. + source kernel/Kconfig.hz config KEXEC diff --git a/arch/i386/boot/setup.S b/arch/i386/boot/setup.S index d2b684c..d63bd9d 100644 --- a/arch/i386/boot/setup.S +++ b/arch/i386/boot/setup.S @@ -394,10 +394,13 @@ # Set the keyboard repeat rate to the ma xorw %bx, %bx int $0x16 +#ifndef CONFIG_VGA_NOPROBE + # Check for video adapter and its parameters and allow the # user to browse video modes. call video # NOTE: we need %ds pointing # to bootsector +#endif # Get hd0 data... xorw %ax, %ax @@ -1006,9 +1009,11 @@ gdt_48: .word gdt_end - gdt - 1 # gdt limit .word 0, 0 # gdt base (filled in later) +#ifndef CONFIG_VGA_NOPROBE # Include video setup & detection code #include "video.S" +#endif # Setup signature -- must be last setup_sig1: .word SIG1 diff --git a/drivers/video/Kconfig b/drivers/video/Kconfig index 6533b0f..21bf515 100644 --- a/drivers/video/Kconfig +++ b/drivers/video/Kconfig @@ -540,7 +540,7 @@ config FB_TGA config FB_VESA bool "VESA VGA graphics support" - depends on (FB = y) && X86 + depends on (FB = y) && X86 && !VGA_NOPROBE select FB_CFB_FILLRECT select FB_CFB_COPYAREA select FB_CFB_IMAGEBLIT @@ -828,7 +828,7 @@ config FB_I810_I2C config FB_INTEL tristate "Intel 830M/845G/852GM/855GM/865G support (EXPERIMENTAL)" - depends on FB && EXPERIMENTAL && PCI && X86 + depends on FB && EXPERIMENTAL && PCI && X86 && !VGA_NOPROBE select AGP select AGP_INTEL select FB_MODE_HELPERS @@ -1166,7 +1166,7 @@ config FB_SAVAGE_ACCEL config FB_SIS tristate "SiS/XGI display support" - depends on FB && PCI + depends on FB && PCI && !VGA_NOPROBE select FB_CFB_FILLRECT select FB_CFB_COPYAREA select FB_CFB_IMAGEBLIT diff --git a/drivers/video/console/Kconfig b/drivers/video/console/Kconfig index 4444bef..0be8e3b 100644 --- a/drivers/video/console/Kconfig +++ b/drivers/video/console/Kconfig @@ -5,8 +5,8 @@ # menu "Console display driver support" config VGA_CONSOLE - bool "VGA text console" if EMBEDDED || !X86 - depends on !ARCH_ACORN && !ARCH_EBSA110 && !4xx && !8xx && !SPARC && !M68K && !PARISC && !FRV && !ARCH_VERSATILE + bool "VGA text console" if (EMBEDDED || !X86) + depends on !ARCH_ACORN && !ARCH_EBSA110 && !4xx && !8xx && !SPARC && !M68K && !PARISC && !FRV && !ARCH_VERSATILE && !VGA_NOPROBE default y help Saying Y here will allow you to use Linux in text mode through a - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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