mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-11-01 17:08:10 +00:00
2995e50627
The EFI FB quirks from efifb.c are useful for simple-framebuffer devices as well. Apply them by default so we can convert efifb.c to use efi-framebuffer platform devices. Signed-off-by: David Herrmann <dh.herrmann@gmail.com> Link: http://lkml.kernel.org/r/1375445127-15480-5-git-send-email-dh.herrmann@gmail.com Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>
74 lines
2.5 KiB
C
74 lines
2.5 KiB
C
/*
|
|
* Generic System Framebuffers on x86
|
|
* Copyright (c) 2012-2013 David Herrmann <dh.herrmann@gmail.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the Free
|
|
* Software Foundation; either version 2 of the License, or (at your option)
|
|
* any later version.
|
|
*/
|
|
|
|
/*
|
|
* Simple-Framebuffer support for x86 systems
|
|
* Create a platform-device for any available boot framebuffer. The
|
|
* simple-framebuffer platform device is already available on DT systems, so
|
|
* this module parses the global "screen_info" object and creates a suitable
|
|
* platform device compatible with the "simple-framebuffer" DT object. If
|
|
* the framebuffer is incompatible, we instead create a legacy
|
|
* "vesa-framebuffer", "efi-framebuffer" or "platform-framebuffer" device and
|
|
* pass the screen_info as platform_data. This allows legacy drivers
|
|
* to pick these devices up without messing with simple-framebuffer drivers.
|
|
* The global "screen_info" is still valid at all times.
|
|
*
|
|
* If CONFIG_X86_SYSFB is not selected, we never register "simple-framebuffer"
|
|
* platform devices, but only use legacy framebuffer devices for
|
|
* backwards compatibility.
|
|
*
|
|
* TODO: We set the dev_id field of all platform-devices to 0. This allows
|
|
* other x86 OF/DT parsers to create such devices, too. However, they must
|
|
* start at offset 1 for this to work.
|
|
*/
|
|
|
|
#include <linux/err.h>
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/mm.h>
|
|
#include <linux/platform_data/simplefb.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/screen_info.h>
|
|
#include <asm/sysfb.h>
|
|
|
|
static __init int sysfb_init(void)
|
|
{
|
|
struct screen_info *si = &screen_info;
|
|
struct simplefb_platform_data mode;
|
|
struct platform_device *pd;
|
|
const char *name;
|
|
bool compatible;
|
|
int ret;
|
|
|
|
sysfb_apply_efi_quirks();
|
|
|
|
/* try to create a simple-framebuffer device */
|
|
compatible = parse_mode(si, &mode);
|
|
if (compatible) {
|
|
ret = create_simplefb(si, &mode);
|
|
if (!ret)
|
|
return 0;
|
|
}
|
|
|
|
/* if the FB is incompatible, create a legacy framebuffer device */
|
|
if (si->orig_video_isVGA == VIDEO_TYPE_EFI)
|
|
name = "efi-framebuffer";
|
|
else if (si->orig_video_isVGA == VIDEO_TYPE_VLFB)
|
|
name = "vesa-framebuffer";
|
|
else
|
|
name = "platform-framebuffer";
|
|
|
|
pd = platform_device_register_resndata(NULL, name, 0,
|
|
NULL, 0, si, sizeof(*si));
|
|
return IS_ERR(pd) ? PTR_ERR(pd) : 0;
|
|
}
|
|
|
|
/* must execute after PCI subsystem for EFI quirks */
|
|
device_initcall(sysfb_init);
|