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1// SPDX-License-Identifier: GPL-2.0-or-later2/*3 * Generic System Framebuffers4 * Copyright (c) 2012-2013 David Herrmann <dh.herrmann@gmail.com>5 *6 * EFI Quirks Copyright (c) 2006 Edgar Hucek <gimli@dark-green.com>7 */8 9/*10 * EFI Quirks11 * Several EFI systems do not correctly advertise their boot framebuffers.12 * Hence, we use this static table of known broken machines and fix up the13 * information so framebuffer drivers can load correctly.14 */15 16#include <linux/dmi.h>17#include <linux/err.h>18#include <linux/efi.h>19#include <linux/init.h>20#include <linux/kernel.h>21#include <linux/mm.h>22#include <linux/of_address.h>23#include <linux/pci.h>24#include <linux/platform_device.h>25#include <linux/screen_info.h>26#include <linux/sysfb.h>27#include <video/vga.h>28 29enum {30 OVERRIDE_NONE = 0x0,31 OVERRIDE_BASE = 0x1,32 OVERRIDE_STRIDE = 0x2,33 OVERRIDE_HEIGHT = 0x4,34 OVERRIDE_WIDTH = 0x8,35};36 37struct efifb_dmi_info efifb_dmi_list[] = {38 [M_I17] = { "i17", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },39 [M_I20] = { "i20", 0x80010000, 1728 * 4, 1680, 1050, OVERRIDE_NONE }, /* guess */40 [M_I20_SR] = { "imac7", 0x40010000, 1728 * 4, 1680, 1050, OVERRIDE_NONE },41 [M_I24] = { "i24", 0x80010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE }, /* guess */42 [M_I24_8_1] = { "imac8", 0xc0060000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },43 [M_I24_10_1] = { "imac10", 0xc0010000, 2048 * 4, 1920, 1080, OVERRIDE_NONE },44 [M_I27_11_1] = { "imac11", 0xc0010000, 2560 * 4, 2560, 1440, OVERRIDE_NONE },45 [M_MINI]= { "mini", 0x80000000, 2048 * 4, 1024, 768, OVERRIDE_NONE },46 [M_MINI_3_1] = { "mini31", 0x40010000, 1024 * 4, 1024, 768, OVERRIDE_NONE },47 [M_MINI_4_1] = { "mini41", 0xc0010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },48 [M_MB] = { "macbook", 0x80000000, 2048 * 4, 1280, 800, OVERRIDE_NONE },49 [M_MB_5_1] = { "macbook51", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },50 [M_MB_6_1] = { "macbook61", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },51 [M_MB_7_1] = { "macbook71", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },52 [M_MBA] = { "mba", 0x80000000, 2048 * 4, 1280, 800, OVERRIDE_NONE },53 /* 11" Macbook Air 3,1 passes the wrong stride */54 [M_MBA_3] = { "mba3", 0, 2048 * 4, 0, 0, OVERRIDE_STRIDE },55 [M_MBP] = { "mbp", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },56 [M_MBP_2] = { "mbp2", 0, 0, 0, 0, OVERRIDE_NONE }, /* placeholder */57 [M_MBP_2_2] = { "mbp22", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },58 [M_MBP_SR] = { "mbp3", 0x80030000, 2048 * 4, 1440, 900, OVERRIDE_NONE },59 [M_MBP_4] = { "mbp4", 0xc0060000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },60 [M_MBP_5_1] = { "mbp51", 0xc0010000, 2048 * 4, 1440, 900, OVERRIDE_NONE },61 [M_MBP_5_2] = { "mbp52", 0xc0010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },62 [M_MBP_5_3] = { "mbp53", 0xd0010000, 2048 * 4, 1440, 900, OVERRIDE_NONE },63 [M_MBP_6_1] = { "mbp61", 0x90030000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },64 [M_MBP_6_2] = { "mbp62", 0x90030000, 2048 * 4, 1680, 1050, OVERRIDE_NONE },65 [M_MBP_7_1] = { "mbp71", 0xc0010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },66 [M_MBP_8_2] = { "mbp82", 0x90010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },67 [M_UNKNOWN] = { NULL, 0, 0, 0, 0, OVERRIDE_NONE }68};69 70void efifb_setup_from_dmi(struct screen_info *si, const char *opt)71{72 int i;73 74 for (i = 0; i < M_UNKNOWN; i++) {75 if (efifb_dmi_list[i].base != 0 &&76 !strcmp(opt, efifb_dmi_list[i].optname)) {77 si->lfb_base = efifb_dmi_list[i].base;78 si->lfb_linelength = efifb_dmi_list[i].stride;79 si->lfb_width = efifb_dmi_list[i].width;80 si->lfb_height = efifb_dmi_list[i].height;81 }82 }83}84 85#define choose_value(dmivalue, fwvalue, field, flags) ({ \86 typeof(fwvalue) _ret_ = fwvalue; \87 if ((flags) & (field)) \88 _ret_ = dmivalue; \89 else if ((fwvalue) == 0) \90 _ret_ = dmivalue; \91 _ret_; \92 })93 94static int __init efifb_set_system(const struct dmi_system_id *id)95{96 struct efifb_dmi_info *info = id->driver_data;97 98 if (info->base == 0 && info->height == 0 && info->width == 0 &&99 info->stride == 0)100 return 0;101 102 /* Trust the bootloader over the DMI tables */103 if (screen_info.lfb_base == 0) {104#if defined(CONFIG_PCI)105 struct pci_dev *dev = NULL;106 int found_bar = 0;107#endif108 if (info->base) {109 screen_info.lfb_base = choose_value(info->base,110 screen_info.lfb_base, OVERRIDE_BASE,111 info->flags);112 113#if defined(CONFIG_PCI)114 /* make sure that the address in the table is actually115 * on a VGA device's PCI BAR */116 117 for_each_pci_dev(dev) {118 int i;119 if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)120 continue;121 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {122 resource_size_t start, end;123 unsigned long flags;124 125 flags = pci_resource_flags(dev, i);126 if (!(flags & IORESOURCE_MEM))127 continue;128 129 if (flags & IORESOURCE_UNSET)130 continue;131 132 if (pci_resource_len(dev, i) == 0)133 continue;134 135 start = pci_resource_start(dev, i);136 end = pci_resource_end(dev, i);137 if (screen_info.lfb_base >= start &&138 screen_info.lfb_base < end) {139 found_bar = 1;140 break;141 }142 }143 }144 if (!found_bar)145 screen_info.lfb_base = 0;146#endif147 }148 }149 if (screen_info.lfb_base) {150 screen_info.lfb_linelength = choose_value(info->stride,151 screen_info.lfb_linelength, OVERRIDE_STRIDE,152 info->flags);153 screen_info.lfb_width = choose_value(info->width,154 screen_info.lfb_width, OVERRIDE_WIDTH,155 info->flags);156 screen_info.lfb_height = choose_value(info->height,157 screen_info.lfb_height, OVERRIDE_HEIGHT,158 info->flags);159 if (screen_info.orig_video_isVGA == 0)160 screen_info.orig_video_isVGA = VIDEO_TYPE_EFI;161 } else {162 screen_info.lfb_linelength = 0;163 screen_info.lfb_width = 0;164 screen_info.lfb_height = 0;165 screen_info.orig_video_isVGA = 0;166 return 0;167 }168 169 printk(KERN_INFO "efifb: dmi detected %s - framebuffer at 0x%08x "170 "(%dx%d, stride %d)\n", id->ident,171 screen_info.lfb_base, screen_info.lfb_width,172 screen_info.lfb_height, screen_info.lfb_linelength);173 174 return 1;175}176 177#define EFIFB_DMI_SYSTEM_ID(vendor, name, enumid) \178 { \179 efifb_set_system, \180 name, \181 { \182 DMI_MATCH(DMI_BIOS_VENDOR, vendor), \183 DMI_MATCH(DMI_PRODUCT_NAME, name) \184 }, \185 &efifb_dmi_list[enumid] \186 }187 188static const struct dmi_system_id efifb_dmi_system_table[] __initconst = {189 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac4,1", M_I17),190 /* At least one of these two will be right; maybe both? */191 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac5,1", M_I20),192 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac5,1", M_I20),193 /* At least one of these two will be right; maybe both? */194 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac6,1", M_I24),195 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac6,1", M_I24),196 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac7,1", M_I20_SR),197 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac8,1", M_I24_8_1),198 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac10,1", M_I24_10_1),199 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac11,1", M_I27_11_1),200 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "Macmini1,1", M_MINI),201 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "Macmini3,1", M_MINI_3_1),202 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "Macmini4,1", M_MINI_4_1),203 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook1,1", M_MB),204 /* At least one of these two will be right; maybe both? */205 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook2,1", M_MB),206 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook2,1", M_MB),207 /* At least one of these two will be right; maybe both? */208 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook3,1", M_MB),209 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook3,1", M_MB),210 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook4,1", M_MB),211 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook5,1", M_MB_5_1),212 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook6,1", M_MB_6_1),213 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook7,1", M_MB_7_1),214 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookAir1,1", M_MBA),215 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookAir3,1", M_MBA_3),216 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro1,1", M_MBP),217 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro2,1", M_MBP_2),218 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro2,2", M_MBP_2_2),219 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro2,1", M_MBP_2),220 EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro3,1", M_MBP_SR),221 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro3,1", M_MBP_SR),222 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro4,1", M_MBP_4),223 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,1", M_MBP_5_1),224 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,2", M_MBP_5_2),225 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,3", M_MBP_5_3),226 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro6,1", M_MBP_6_1),227 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro6,2", M_MBP_6_2),228 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro7,1", M_MBP_7_1),229 EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro8,2", M_MBP_8_2),230 {},231};232 233/*234 * Some devices have a portrait LCD but advertise a landscape resolution (and235 * pitch). We simply swap width and height for these devices so that we can236 * correctly deal with some of them coming with multiple resolutions.237 */238static const struct dmi_system_id efifb_dmi_swap_width_height[] __initconst = {239 {240 /*241 * Lenovo MIIX310-10ICR, only some batches have the troublesome242 * 800x1280 portrait screen. Luckily the portrait version has243 * its own BIOS version, so we match on that.244 */245 .matches = {246 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"),247 DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "MIIX 310-10ICR"),248 DMI_EXACT_MATCH(DMI_BIOS_VERSION, "1HCN44WW"),249 },250 },251 {252 /* Lenovo MIIX 320-10ICR with 800x1280 portrait screen */253 .matches = {254 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"),255 DMI_EXACT_MATCH(DMI_PRODUCT_VERSION,256 "Lenovo MIIX 320-10ICR"),257 },258 },259 {260 /* Lenovo D330 with 800x1280 or 1200x1920 portrait screen */261 .matches = {262 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"),263 DMI_EXACT_MATCH(DMI_PRODUCT_VERSION,264 "Lenovo ideapad D330-10IGM"),265 },266 },267 {268 /* Lenovo IdeaPad Duet 3 10IGL5 with 1200x1920 portrait screen */269 .matches = {270 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"),271 DMI_EXACT_MATCH(DMI_PRODUCT_VERSION,272 "IdeaPad Duet 3 10IGL5"),273 },274 },275 {276 /* Lenovo Yoga Book X91F / X91L */277 .matches = {278 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"),279 /* Non exact match to match F + L versions */280 DMI_MATCH(DMI_PRODUCT_NAME, "Lenovo YB1-X91"),281 },282 },283 {},284};285 286static bool efifb_overlaps_pci_range(const struct of_pci_range *range)287{288 u64 fb_base = screen_info.lfb_base;289 290 if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE)291 fb_base |= (u64)(unsigned long)screen_info.ext_lfb_base << 32;292 293 return fb_base >= range->cpu_addr &&294 fb_base < (range->cpu_addr + range->size);295}296 297static struct device_node *find_pci_overlap_node(void)298{299 struct device_node *np;300 301 for_each_node_by_type(np, "pci") {302 struct of_pci_range_parser parser;303 struct of_pci_range range;304 int err;305 306 err = of_pci_range_parser_init(&parser, np);307 if (err) {308 pr_warn("of_pci_range_parser_init() failed: %d\n", err);309 continue;310 }311 312 for_each_of_pci_range(&parser, &range)313 if (efifb_overlaps_pci_range(&range))314 return np;315 }316 return NULL;317}318 319/*320 * If the efifb framebuffer is backed by a PCI graphics controller, we have321 * to ensure that this relation is expressed using a device link when322 * running in DT mode, or the probe order may be reversed, resulting in a323 * resource reservation conflict on the memory window that the efifb324 * framebuffer steals from the PCIe host bridge.325 */326static int efifb_add_links(struct fwnode_handle *fwnode)327{328 struct device_node *sup_np;329 330 sup_np = find_pci_overlap_node();331 332 /*333 * If there's no PCI graphics controller backing the efifb, we are334 * done here.335 */336 if (!sup_np)337 return 0;338 339 fwnode_link_add(fwnode, of_fwnode_handle(sup_np), 0);340 of_node_put(sup_np);341 342 return 0;343}344 345static const struct fwnode_operations efifb_fwnode_ops = {346 .add_links = efifb_add_links,347};348 349#ifdef CONFIG_EFI350static struct fwnode_handle efifb_fwnode;351 352__init void sysfb_apply_efi_quirks(void)353{354 if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI ||355 !(screen_info.capabilities & VIDEO_CAPABILITY_SKIP_QUIRKS))356 dmi_check_system(efifb_dmi_system_table);357 358 if (screen_info.orig_video_isVGA == VIDEO_TYPE_EFI &&359 dmi_check_system(efifb_dmi_swap_width_height)) {360 u16 temp = screen_info.lfb_width;361 362 screen_info.lfb_width = screen_info.lfb_height;363 screen_info.lfb_height = temp;364 screen_info.lfb_linelength = 4 * screen_info.lfb_width;365 }366}367 368__init void sysfb_set_efifb_fwnode(struct platform_device *pd)369{370 if (screen_info.orig_video_isVGA == VIDEO_TYPE_EFI && IS_ENABLED(CONFIG_PCI)) {371 fwnode_init(&efifb_fwnode, &efifb_fwnode_ops);372 pd->dev.fwnode = &efifb_fwnode;373 }374}375#endif376