// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Generic System Framebuffers
* Copyright ( c ) 2012 - 2013 David Herrmann < dh . herrmann @ gmail . com >
*
* EFI Quirks Copyright ( c ) 2006 Edgar Hucek < gimli @ dark - green . com >
*/
/*
* EFI Quirks
* Several EFI systems do not correctly advertise their boot framebuffers .
* Hence , we use this static table of known broken machines and fix up the
* information so framebuffer drivers can load correctly .
*/
#include <linux/dmi.h>
#include <linux/err.h>
#include <linux/efi.h>
#include <linux/init.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/of_address.h>
#include <linux/pci.h>
#include <linux/platform_device.h>
#include <linux/screen_info.h>
#include <linux/sysfb.h>
#include <video/vga.h>
enum {
OVERRIDE_NONE = 0 x0,
OVERRIDE_BASE = 0 x1,
OVERRIDE_STRIDE = 0 x2,
OVERRIDE_HEIGHT = 0 x4,
OVERRIDE_WIDTH = 0 x8,
};
struct efifb_dmi_info efifb_dmi_list[] = {
[M_I17] = { "i17" , 0 x80010000, 1472 * 4 , 1440 , 900 , OVERRIDE_NONE },
[M_I20] = { "i20" , 0 x80010000, 1728 * 4 , 1680 , 1050 , OVERRIDE_NONE }, /* guess */
[M_I20_SR] = { "imac7" , 0 x40010000, 1728 * 4 , 1680 , 1050 , OVERRIDE_NONE },
[M_I24] = { "i24" , 0 x80010000, 2048 * 4 , 1920 , 1200 , OVERRIDE_NONE }, /* guess */
[M_I24_8_1] = { "imac8" , 0 xc0060000, 2048 * 4 , 1920 , 1200 , OVERRIDE_NONE },
[M_I24_10_1] = { "imac10" , 0 xc0010000, 2048 * 4 , 1920 , 1080 , OVERRIDE_NONE },
[M_I27_11_1] = { "imac11" , 0 xc0010000, 2560 * 4 , 2560 , 1440 , OVERRIDE_NONE },
[M_MINI]= { "mini" , 0 x80000000, 2048 * 4 , 1024 , 768 , OVERRIDE_NONE },
[M_MINI_3_1] = { "mini31" , 0 x40010000, 1024 * 4 , 1024 , 768 , OVERRIDE_NONE },
[M_MINI_4_1] = { "mini41" , 0 xc0010000, 2048 * 4 , 1920 , 1200 , OVERRIDE_NONE },
[M_MB] = { "macbook" , 0 x80000000, 2048 * 4 , 1280 , 800 , OVERRIDE_NONE },
[M_MB_5_1] = { "macbook51" , 0 x80010000, 2048 * 4 , 1280 , 800 , OVERRIDE_NONE },
[M_MB_6_1] = { "macbook61" , 0 x80010000, 2048 * 4 , 1280 , 800 , OVERRIDE_NONE },
[M_MB_7_1] = { "macbook71" , 0 x80010000, 2048 * 4 , 1280 , 800 , OVERRIDE_NONE },
[M_MBA] = { "mba" , 0 x80000000, 2048 * 4 , 1280 , 800 , OVERRIDE_NONE },
/* 11" Macbook Air 3,1 passes the wrong stride */
[M_MBA_3] = { "mba3" , 0 , 2048 * 4 , 0 , 0 , OVERRIDE_STRIDE },
[M_MBP] = { "mbp" , 0 x80010000, 1472 * 4 , 1440 , 900 , OVERRIDE_NONE },
[M_MBP_2] = { "mbp2" , 0 , 0 , 0 , 0 , OVERRIDE_NONE }, /* placeholder */
[M_MBP_2_2] = { "mbp22" , 0 x80010000, 1472 * 4 , 1440 , 900 , OVERRIDE_NONE },
[M_MBP_SR] = { "mbp3" , 0 x80030000, 2048 * 4 , 1440 , 900 , OVERRIDE_NONE },
[M_MBP_4] = { "mbp4" , 0 xc0060000, 2048 * 4 , 1920 , 1200 , OVERRIDE_NONE },
[M_MBP_5_1] = { "mbp51" , 0 xc0010000, 2048 * 4 , 1440 , 900 , OVERRIDE_NONE },
[M_MBP_5_2] = { "mbp52" , 0 xc0010000, 2048 * 4 , 1920 , 1200 , OVERRIDE_NONE },
[M_MBP_5_3] = { "mbp53" , 0 xd0010000, 2048 * 4 , 1440 , 900 , OVERRIDE_NONE },
[M_MBP_6_1] = { "mbp61" , 0 x90030000, 2048 * 4 , 1920 , 1200 , OVERRIDE_NONE },
[M_MBP_6_2] = { "mbp62" , 0 x90030000, 2048 * 4 , 1680 , 1050 , OVERRIDE_NONE },
[M_MBP_7_1] = { "mbp71" , 0 xc0010000, 2048 * 4 , 1280 , 800 , OVERRIDE_NONE },
[M_MBP_8_2] = { "mbp82" , 0 x90010000, 1472 * 4 , 1440 , 900 , OVERRIDE_NONE },
[M_UNKNOWN] = { NULL, 0 , 0 , 0 , 0 , OVERRIDE_NONE }
};
void efifb_setup_from_dmi(struct screen_info *si, const char *opt)
{
int i;
for (i = 0 ; i < M_UNKNOWN; i++) {
if (efifb_dmi_list[i].base != 0 &&
!strcmp(opt, efifb_dmi_list[i].optname)) {
si->lfb_base = efifb_dmi_list[i].base;
si->lfb_linelength = efifb_dmi_list[i].stride;
si->lfb_width = efifb_dmi_list[i].width;
si->lfb_height = efifb_dmi_list[i].height;
}
}
}
#define choose_value(dmivalue, fwvalue, field, flags) ({ \
typeof(fwvalue) _ret_ = fwvalue; \
if ((flags) & (field)) \
_ret_ = dmivalue; \
else if ((fwvalue) == 0 ) \
_ret_ = dmivalue; \
_ret_; \
})
#ifdef CONFIG_EFI
static int __init efifb_set_system(const struct dmi_system_id *id)
{
struct efifb_dmi_info *info = id->driver_data;
if (info->base == 0 && info->height == 0 && info->width == 0 &&
info->stride == 0 )
return 0 ;
/* Trust the bootloader over the DMI tables */
if (screen_info.lfb_base == 0 ) {
#if defined (CONFIG_PCI)
struct pci_dev *dev = NULL;
int found_bar = 0 ;
#endif
if (info->base) {
screen_info.lfb_base = choose_value(info->base,
screen_info.lfb_base, OVERRIDE_BASE,
info->flags);
#if defined (CONFIG_PCI)
/* make sure that the address in the table is actually
* on a VGA device's PCI BAR */
for_each_pci_dev(dev) {
int i;
if ((dev->class >> 8 ) != PCI_CLASS_DISPLAY_VGA)
continue ;
for (i = 0 ; i < DEVICE_COUNT_RESOURCE; i++) {
resource_size_t start, end;
unsigned long flags;
flags = pci_resource_flags(dev, i);
if (!(flags & IORESOURCE_MEM))
continue ;
if (flags & IORESOURCE_UNSET)
continue ;
if (pci_resource_len(dev, i) == 0 )
continue ;
start = pci_resource_start(dev, i);
end = pci_resource_end(dev, i);
if (screen_info.lfb_base >= start &&
screen_info.lfb_base < end) {
found_bar = 1 ;
break ;
}
}
}
if (!found_bar)
screen_info.lfb_base = 0 ;
#endif
}
}
if (screen_info.lfb_base) {
screen_info.lfb_linelength = choose_value(info->stride,
screen_info.lfb_linelength, OVERRIDE_STRIDE,
info->flags);
screen_info.lfb_width = choose_value(info->width,
screen_info.lfb_width, OVERRIDE_WIDTH,
info->flags);
screen_info.lfb_height = choose_value(info->height,
screen_info.lfb_height, OVERRIDE_HEIGHT,
info->flags);
if (screen_info.orig_video_isVGA == 0 )
screen_info.orig_video_isVGA = VIDEO_TYPE_EFI;
} else {
screen_info.lfb_linelength = 0 ;
screen_info.lfb_width = 0 ;
screen_info.lfb_height = 0 ;
screen_info.orig_video_isVGA = 0 ;
return 0 ;
}
printk(KERN_INFO "efifb: dmi detected %s - framebuffer at 0x%08x "
"(%dx%d, stride %d)\n" , id->ident,
screen_info.lfb_base, screen_info.lfb_width,
screen_info.lfb_height, screen_info.lfb_linelength);
return 1 ;
}
#define EFIFB_DMI_SYSTEM_ID(vendor, name, enumid) \
{ \
efifb_set_system, \
name, \
{ \
DMI_MATCH(DMI_BIOS_VENDOR, vendor), \
DMI_MATCH(DMI_PRODUCT_NAME, name) \
}, \
&efifb_dmi_list[enumid] \
}
static const struct dmi_system_id efifb_dmi_system_table[] __initconst = {
EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc." , "iMac4,1" , M_I17),
/* At least one of these two will be right; maybe both? */
EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc." , "iMac5,1" , M_I20),
EFIFB_DMI_SYSTEM_ID("Apple Inc." , "iMac5,1" , M_I20),
/* At least one of these two will be right; maybe both? */
EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc." , "iMac6,1" , M_I24),
EFIFB_DMI_SYSTEM_ID("Apple Inc." , "iMac6,1" , M_I24),
EFIFB_DMI_SYSTEM_ID("Apple Inc." , "iMac7,1" , M_I20_SR),
EFIFB_DMI_SYSTEM_ID("Apple Inc." , "iMac8,1" , M_I24_8_1),
EFIFB_DMI_SYSTEM_ID("Apple Inc." , "iMac10,1" , M_I24_10_1),
EFIFB_DMI_SYSTEM_ID("Apple Inc." , "iMac11,1" , M_I27_11_1),
EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc." , "Macmini1,1" , M_MINI),
EFIFB_DMI_SYSTEM_ID("Apple Inc." , "Macmini3,1" , M_MINI_3_1),
EFIFB_DMI_SYSTEM_ID("Apple Inc." , "Macmini4,1" , M_MINI_4_1),
EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc." , "MacBook1,1" , M_MB),
/* At least one of these two will be right; maybe both? */
EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc." , "MacBook2,1" , M_MB),
EFIFB_DMI_SYSTEM_ID("Apple Inc." , "MacBook2,1" , M_MB),
/* At least one of these two will be right; maybe both? */
EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc." , "MacBook3,1" , M_MB),
EFIFB_DMI_SYSTEM_ID("Apple Inc." , "MacBook3,1" , M_MB),
EFIFB_DMI_SYSTEM_ID("Apple Inc." , "MacBook4,1" , M_MB),
EFIFB_DMI_SYSTEM_ID("Apple Inc." , "MacBook5,1" , M_MB_5_1),
EFIFB_DMI_SYSTEM_ID("Apple Inc." , "MacBook6,1" , M_MB_6_1),
EFIFB_DMI_SYSTEM_ID("Apple Inc." , "MacBook7,1" , M_MB_7_1),
EFIFB_DMI_SYSTEM_ID("Apple Inc." , "MacBookAir1,1" , M_MBA),
EFIFB_DMI_SYSTEM_ID("Apple Inc." , "MacBookAir3,1" , M_MBA_3),
EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc." , "MacBookPro1,1" , M_MBP),
EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc." , "MacBookPro2,1" , M_MBP_2),
EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc." , "MacBookPro2,2" , M_MBP_2_2),
EFIFB_DMI_SYSTEM_ID("Apple Inc." , "MacBookPro2,1" , M_MBP_2),
EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc." , "MacBookPro3,1" , M_MBP_SR),
EFIFB_DMI_SYSTEM_ID("Apple Inc." , "MacBookPro3,1" , M_MBP_SR),
EFIFB_DMI_SYSTEM_ID("Apple Inc." , "MacBookPro4,1" , M_MBP_4),
EFIFB_DMI_SYSTEM_ID("Apple Inc." , "MacBookPro5,1" , M_MBP_5_1),
EFIFB_DMI_SYSTEM_ID("Apple Inc." , "MacBookPro5,2" , M_MBP_5_2),
EFIFB_DMI_SYSTEM_ID("Apple Inc." , "MacBookPro5,3" , M_MBP_5_3),
EFIFB_DMI_SYSTEM_ID("Apple Inc." , "MacBookPro6,1" , M_MBP_6_1),
EFIFB_DMI_SYSTEM_ID("Apple Inc." , "MacBookPro6,2" , M_MBP_6_2),
EFIFB_DMI_SYSTEM_ID("Apple Inc." , "MacBookPro7,1" , M_MBP_7_1),
EFIFB_DMI_SYSTEM_ID("Apple Inc." , "MacBookPro8,2" , M_MBP_8_2),
{},
};
/*
* Some devices have a portrait LCD but advertise a landscape resolution ( and
* pitch ) . We simply swap width and height for these devices so that we can
* correctly deal with some of them coming with multiple resolutions .
*/
static const struct dmi_system_id efifb_dmi_swap_width_height[] __initconst = {
{
/*
* Lenovo MIIX310 - 10 ICR , only some batches have the troublesome
* 800 x1280 portrait screen . Luckily the portrait version has
* its own BIOS version , so we match on that .
*/
.matches = {
DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO" ),
DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "MIIX 310-10ICR" ),
DMI_EXACT_MATCH(DMI_BIOS_VERSION, "1HCN44WW" ),
},
},
{
/* Lenovo MIIX 320-10ICR with 800x1280 portrait screen */
.matches = {
DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO" ),
DMI_EXACT_MATCH(DMI_PRODUCT_VERSION,
"Lenovo MIIX 320-10ICR" ),
},
},
{
/* Lenovo D330 with 800x1280 or 1200x1920 portrait screen */
.matches = {
DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO" ),
DMI_EXACT_MATCH(DMI_PRODUCT_VERSION,
"Lenovo ideapad D330-10IGM" ),
},
},
{
/* Lenovo IdeaPad Duet 3 10IGL5 with 1200x1920 portrait screen */
.matches = {
DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO" ),
DMI_EXACT_MATCH(DMI_PRODUCT_VERSION,
"IdeaPad Duet 3 10IGL5" ),
},
},
{
/* Lenovo Yoga Book X91F / X91L */
.matches = {
DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO" ),
/* Non exact match to match F + L versions */
DMI_MATCH(DMI_PRODUCT_NAME, "Lenovo YB1-X91" ),
},
},
{},
};
static bool efifb_overlaps_pci_range(const struct of_pci_range *range)
{
u64 fb_base = screen_info.lfb_base;
if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE)
fb_base |= (u64)(unsigned long )screen_info.ext_lfb_base << 32 ;
return fb_base >= range->cpu_addr &&
fb_base < (range->cpu_addr + range->size);
}
static struct device_node *find_pci_overlap_node(void )
{
struct device_node *np;
for_each_node_by_type(np, "pci" ) {
struct of_pci_range_parser parser;
struct of_pci_range range;
int err;
err = of_pci_range_parser_init(&parser, np);
if (err) {
pr_warn("of_pci_range_parser_init() failed: %d\n" , err);
continue ;
}
for_each_of_pci_range(&parser, &range)
if (efifb_overlaps_pci_range(&range))
return np;
}
return NULL;
}
/*
* If the efifb framebuffer is backed by a PCI graphics controller , we have
* to ensure that this relation is expressed using a device link when
* running in DT mode , or the probe order may be reversed , resulting in a
* resource reservation conflict on the memory window that the efifb
* framebuffer steals from the PCIe host bridge .
*/
static int efifb_add_links(struct fwnode_handle *fwnode)
{
struct device_node *sup_np;
sup_np = find_pci_overlap_node();
/*
* If there ' s no PCI graphics controller backing the efifb , we are
* done here .
*/
if (!sup_np)
return 0 ;
fwnode_link_add(fwnode, of_fwnode_handle(sup_np), 0 );
of_node_put(sup_np);
return 0 ;
}
static const struct fwnode_operations efifb_fwnode_ops = {
.add_links = efifb_add_links,
};
static struct fwnode_handle efifb_fwnode;
__init void sysfb_apply_efi_quirks(void )
{
if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI ||
!(screen_info.capabilities & VIDEO_CAPABILITY_SKIP_QUIRKS))
dmi_check_system(efifb_dmi_system_table);
if (screen_info.orig_video_isVGA == VIDEO_TYPE_EFI &&
dmi_check_system(efifb_dmi_swap_width_height)) {
u16 temp = screen_info.lfb_width;
screen_info.lfb_width = screen_info.lfb_height;
screen_info.lfb_height = temp;
screen_info.lfb_linelength = 4 * screen_info.lfb_width;
}
}
__init void sysfb_set_efifb_fwnode(struct platform_device *pd)
{
if (screen_info.orig_video_isVGA == VIDEO_TYPE_EFI && IS_ENABLED(CONFIG_PCI)) {
fwnode_init(&efifb_fwnode, &efifb_fwnode_ops);
pd->dev.fwnode = &efifb_fwnode;
}
}
#endif
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