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| author |   Thomas Zimmermann <tzimmermann@suse.de> | 2024-02-12 10:06:09 +0100 |
|---|---|---|
| committer | Thomas Zimmermann <tzimmermann@suse.de> | 2024-02-14 10:09:13 +0100 |
| commit | 75fa9b7e375e35739663cde0252d31e586c6314a (patch) | |
| tree | bc45e1a78af8af4e11e661af408c751bf3618f47 /drivers/firmware/Kconfig | |
| parent | dt-bindings: display: rockchip,dw-hdmi: add power-domains property (diff) | |
| download | wireguard-linux-75fa9b7e375e35739663cde0252d31e586c6314a.tar.xz wireguard-linux-75fa9b7e375e35739663cde0252d31e586c6314a.zip | |
video: Add helpers for decoding screen_info
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
Diffstat (limited to 'drivers/firmware/Kconfig')
| -rw-r--r-- | drivers/firmware/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/firmware/Kconfig b/drivers/firmware/Kconfig index afd38539b92e..71d8b26c4103 100644 --- a/drivers/firmware/Kconfig +++ b/drivers/firmware/Kconfig @@ -182,6 +182,7 @@ config MTK_ADSP_IPC config SYSFB bool select BOOT_VESA_SUPPORT + select SCREEN_INFO config SYSFB_SIMPLEFB bool "Mark VGA/VBE/EFI FB as generic system framebuffer" |