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The plain values as stored in struct screen_info need to be decoded before being used. Add helpers that decode the type of video output and the framebuffer I/O aperture. Old or non-x86 systems may not set the type of video directly, but only indicate the presence by storing 0x01 in orig_video_isVGA. The decoding logic in screen_info_video_type() takes this into account. It then follows similar code in vgacon's vgacon_startup() to detect the video type from the given values. A call to screen_info_resources() returns all known resources of the given screen_info. The resources' values have been taken from existing code in vgacon and vga16fb. These drivers can later be converted to use the new interfaces. v2: * return ssize_t from screen_info_resources() * don't call __screen_info_has_lfb() unnecessarily Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de> Reviewed-by: Javier Martinez Canillas <javierm@redhat.com> Link: https://patchwork.freedesktop.org/patch/msgid/20240212090736.11464-2-tzimmermann@suse.de
74 lines
1.1 KiB
Plaintext
74 lines
1.1 KiB
Plaintext
# SPDX-License-Identifier: GPL-2.0-only
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#
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# Video configuration
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#
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menu "Graphics support"
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config APERTURE_HELPERS
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bool
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help
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Support tracking and hand-over of aperture ownership. Required
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by graphics drivers for firmware-provided framebuffers.
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config SCREEN_INFO
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bool
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default n
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config STI_CORE
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bool
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depends on PARISC
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help
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STI refers to the HP "Standard Text Interface" which is a set of
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BIOS routines contained in a ROM chip in HP PA-RISC based machines.
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config VIDEO
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bool
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default n
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source "drivers/auxdisplay/Kconfig"
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if HAS_IOMEM
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config HAVE_FB_ATMEL
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bool
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source "drivers/char/agp/Kconfig"
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source "drivers/gpu/vga/Kconfig"
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source "drivers/gpu/host1x/Kconfig"
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source "drivers/gpu/ipu-v3/Kconfig"
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source "drivers/gpu/drm/Kconfig"
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menu "Frame buffer Devices"
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source "drivers/video/fbdev/Kconfig"
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endmenu
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source "drivers/video/backlight/Kconfig"
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config VGASTATE
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tristate
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default n
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config VIDEOMODE_HELPERS
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bool
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config HDMI
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bool
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endif # HAS_IOMEM
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if VT
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source "drivers/video/console/Kconfig"
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endif
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if FB_CORE || SGI_NEWPORT_CONSOLE
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source "drivers/video/logo/Kconfig"
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endif
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endmenu
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