linux/arch/x86/kernel/sysfb_efi.c
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   1// SPDX-License-Identifier: GPL-2.0-or-later
   2/*
   3 * Generic System Framebuffers on x86
   4 * 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 Quirks
  11 * Several EFI systems do not correctly advertise their boot framebuffers.
  12 * Hence, we use this static table of known broken machines and fix up the
  13 * information so framebuffer drivers can load corectly.
  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/pci.h>
  23#include <linux/screen_info.h>
  24#include <video/vga.h>
  25
  26#include <asm/efi.h>
  27#include <asm/sysfb.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#endif
 108                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 actually
 115                         * 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#endif
 147                }
 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 (and
 235 * pitch). We simply swap width and height for these devices so that we can
 236 * 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 troublesome
 242                 * 800x1280 portrait screen. Luckily the portrait version has
 243                 * 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};
 269
 270__init void sysfb_apply_efi_quirks(void)
 271{
 272        if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI ||
 273            !(screen_info.capabilities & VIDEO_CAPABILITY_SKIP_QUIRKS))
 274                dmi_check_system(efifb_dmi_system_table);
 275
 276        if (screen_info.orig_video_isVGA == VIDEO_TYPE_EFI &&
 277            dmi_check_system(efifb_dmi_swap_width_height)) {
 278                u16 temp = screen_info.lfb_width;
 279
 280                screen_info.lfb_width = screen_info.lfb_height;
 281                screen_info.lfb_height = temp;
 282                screen_info.lfb_linelength = 4 * screen_info.lfb_width;
 283        }
 284}
 285
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