drivers/firmware/efi/sysfb_efi.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Generic System Framebuffers
   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 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
  29 #include <asm/efi.h>
  30
  31 enum {
  32         OVERRIDE_NONE = 0x0,
  33         OVERRIDE_BASE = 0x1,
  34         OVERRIDE_STRIDE = 0x2,
  35         OVERRIDE_HEIGHT = 0x4,
  36         OVERRIDE_WIDTH = 0x8,
  37 };
  38
  39 struct efifb_dmi_info efifb_dmi_list[] = {
  40         [M_I17] = { "i17", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
  41         [M_I20] = { "i20", 0x80010000, 1728 * 4, 1680, 1050, OVERRIDE_NONE }, /* guess */
  42         [M_I20_SR] = { "imac7", 0x40010000, 1728 * 4, 1680, 1050, OVERRIDE_NONE },
  43         [M_I24] = { "i24", 0x80010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE }, /* guess */
  44         [M_I24_8_1] = { "imac8", 0xc0060000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
  45         [M_I24_10_1] = { "imac10", 0xc0010000, 2048 * 4, 1920, 1080, OVERRIDE_NONE },
  46         [M_I27_11_1] = { "imac11", 0xc0010000, 2560 * 4, 2560, 1440, OVERRIDE_NONE },
  47         [M_MINI]= { "mini", 0x80000000, 2048 * 4, 1024, 768, OVERRIDE_NONE },
  48         [M_MINI_3_1] = { "mini31", 0x40010000, 1024 * 4, 1024, 768, OVERRIDE_NONE },
  49         [M_MINI_4_1] = { "mini41", 0xc0010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
  50         [M_MB] = { "macbook", 0x80000000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
  51         [M_MB_5_1] = { "macbook51", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
  52         [M_MB_6_1] = { "macbook61", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
  53         [M_MB_7_1] = { "macbook71", 0x80010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
  54         [M_MBA] = { "mba", 0x80000000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
  55         /* 11" Macbook Air 3,1 passes the wrong stride */
  56         [M_MBA_3] = { "mba3", 0, 2048 * 4, 0, 0, OVERRIDE_STRIDE },
  57         [M_MBP] = { "mbp", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
  58         [M_MBP_2] = { "mbp2", 0, 0, 0, 0, OVERRIDE_NONE }, /* placeholder */
  59         [M_MBP_2_2] = { "mbp22", 0x80010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
  60         [M_MBP_SR] = { "mbp3", 0x80030000, 2048 * 4, 1440, 900, OVERRIDE_NONE },
  61         [M_MBP_4] = { "mbp4", 0xc0060000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
  62         [M_MBP_5_1] = { "mbp51", 0xc0010000, 2048 * 4, 1440, 900, OVERRIDE_NONE },
  63         [M_MBP_5_2] = { "mbp52", 0xc0010000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
  64         [M_MBP_5_3] = { "mbp53", 0xd0010000, 2048 * 4, 1440, 900, OVERRIDE_NONE },
  65         [M_MBP_6_1] = { "mbp61", 0x90030000, 2048 * 4, 1920, 1200, OVERRIDE_NONE },
  66         [M_MBP_6_2] = { "mbp62", 0x90030000, 2048 * 4, 1680, 1050, OVERRIDE_NONE },
  67         [M_MBP_7_1] = { "mbp71", 0xc0010000, 2048 * 4, 1280, 800, OVERRIDE_NONE },
  68         [M_MBP_8_2] = { "mbp82", 0x90010000, 1472 * 4, 1440, 900, OVERRIDE_NONE },
  69         [M_UNKNOWN] = { NULL, 0, 0, 0, 0, OVERRIDE_NONE }
  70 };
  71
  72 void efifb_setup_from_dmi(struct screen_info *si, const char *opt)
  73 {
  74         int i;
  75
  76         for (i = 0; i < M_UNKNOWN; i++) {
  77                 if (efifb_dmi_list[i].base != 0 &&
  78                     !strcmp(opt, efifb_dmi_list[i].optname)) {
  79                         si->lfb_base = efifb_dmi_list[i].base;
  80                         si->lfb_linelength = efifb_dmi_list[i].stride;
  81                         si->lfb_width = efifb_dmi_list[i].width;
  82                         si->lfb_height = efifb_dmi_list[i].height;
  83                 }
  84         }
  85 }
  86
  87 #define choose_value(dmivalue, fwvalue, field, flags) ({        \
  88                 typeof(fwvalue) _ret_ = fwvalue;                \
  89                 if ((flags) & (field))                          \
  90                         _ret_ = dmivalue;                       \
  91                 else if ((fwvalue) == 0)                        \
  92                         _ret_ = dmivalue;                       \
  93                 _ret_;                                          \
  94         })
  95
  96 static int __init efifb_set_system(const struct dmi_system_id *id)
  97 {
  98         struct efifb_dmi_info *info = id->driver_data;
  99
 100         if (info->base == 0 && info->height == 0 && info->width == 0 &&
 101             info->stride == 0)
 102                 return 0;
 103
 104         /* Trust the bootloader over the DMI tables */
 105         if (screen_info.lfb_base == 0) {
 106 #if defined(CONFIG_PCI)
 107                 struct pci_dev *dev = NULL;
 108                 int found_bar = 0;
 109 #endif
 110                 if (info->base) {
 111                         screen_info.lfb_base = choose_value(info->base,
 112                                 screen_info.lfb_base, OVERRIDE_BASE,
 113                                 info->flags);
 114
 115 #if defined(CONFIG_PCI)
 116                         /* make sure that the address in the table is actually
 117                          * on a VGA device's PCI BAR */
 118
 119                         for_each_pci_dev(dev) {
 120                                 int i;
 121                                 if ((dev->class >> 8) != PCI_CLASS_DISPLAY_VGA)
 122                                         continue;
 123                                 for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
 124                                         resource_size_t start, end;
 125                                         unsigned long flags;
 126
 127                                         flags = pci_resource_flags(dev, i);
 128                                         if (!(flags & IORESOURCE_MEM))
 129                                                 continue;
 130
 131                                         if (flags & IORESOURCE_UNSET)
 132                                                 continue;
 133
 134                                         if (pci_resource_len(dev, i) == 0)
 135                                                 continue;
 136
 137                                         start = pci_resource_start(dev, i);
 138                                         end = pci_resource_end(dev, i);
 139                                         if (screen_info.lfb_base >= start &&
 140                                             screen_info.lfb_base < end) {
 141                                                 found_bar = 1;
 142                                                 break;
 143                                         }
 144                                 }
 145                         }
 146                         if (!found_bar)
 147                                 screen_info.lfb_base = 0;
 148 #endif
 149                 }
 150         }
 151         if (screen_info.lfb_base) {
 152                 screen_info.lfb_linelength = choose_value(info->stride,
 153                         screen_info.lfb_linelength, OVERRIDE_STRIDE,
 154                         info->flags);
 155                 screen_info.lfb_width = choose_value(info->width,
 156                         screen_info.lfb_width, OVERRIDE_WIDTH,
 157                         info->flags);
 158                 screen_info.lfb_height = choose_value(info->height,
 159                         screen_info.lfb_height, OVERRIDE_HEIGHT,
 160                         info->flags);
 161                 if (screen_info.orig_video_isVGA == 0)
 162                         screen_info.orig_video_isVGA = VIDEO_TYPE_EFI;
 163         } else {
 164                 screen_info.lfb_linelength = 0;
 165                 screen_info.lfb_width = 0;
 166                 screen_info.lfb_height = 0;
 167                 screen_info.orig_video_isVGA = 0;
 168                 return 0;
 169         }
 170
 171         printk(KERN_INFO "efifb: dmi detected %s - framebuffer at 0x%08x "
 172                          "(%dx%d, stride %d)\n", id->ident,
 173                          screen_info.lfb_base, screen_info.lfb_width,
 174                          screen_info.lfb_height, screen_info.lfb_linelength);
 175
 176         return 1;
 177 }
 178
 179 #define EFIFB_DMI_SYSTEM_ID(vendor, name, enumid)               \
 180         {                                                       \
 181                 efifb_set_system,                               \
 182                 name,                                           \
 183                 {                                               \
 184                         DMI_MATCH(DMI_BIOS_VENDOR, vendor),     \
 185                         DMI_MATCH(DMI_PRODUCT_NAME, name)       \
 186                 },                                              \
 187                 &efifb_dmi_list[enumid]                         \
 188         }
 189
 190 static const struct dmi_system_id efifb_dmi_system_table[] __initconst = {
 191         EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac4,1", M_I17),
 192         /* At least one of these two will be right; maybe both? */
 193         EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac5,1", M_I20),
 194         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac5,1", M_I20),
 195         /* At least one of these two will be right; maybe both? */
 196         EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "iMac6,1", M_I24),
 197         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac6,1", M_I24),
 198         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac7,1", M_I20_SR),
 199         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac8,1", M_I24_8_1),
 200         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac10,1", M_I24_10_1),
 201         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "iMac11,1", M_I27_11_1),
 202         EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "Macmini1,1", M_MINI),
 203         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "Macmini3,1", M_MINI_3_1),
 204         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "Macmini4,1", M_MINI_4_1),
 205         EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook1,1", M_MB),
 206         /* At least one of these two will be right; maybe both? */
 207         EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook2,1", M_MB),
 208         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook2,1", M_MB),
 209         /* At least one of these two will be right; maybe both? */
 210         EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBook3,1", M_MB),
 211         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook3,1", M_MB),
 212         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook4,1", M_MB),
 213         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook5,1", M_MB_5_1),
 214         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook6,1", M_MB_6_1),
 215         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBook7,1", M_MB_7_1),
 216         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookAir1,1", M_MBA),
 217         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookAir3,1", M_MBA_3),
 218         EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro1,1", M_MBP),
 219         EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro2,1", M_MBP_2),
 220         EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro2,2", M_MBP_2_2),
 221         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro2,1", M_MBP_2),
 222         EFIFB_DMI_SYSTEM_ID("Apple Computer, Inc.", "MacBookPro3,1", M_MBP_SR),
 223         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro3,1", M_MBP_SR),
 224         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro4,1", M_MBP_4),
 225         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,1", M_MBP_5_1),
 226         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,2", M_MBP_5_2),
 227         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro5,3", M_MBP_5_3),
 228         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro6,1", M_MBP_6_1),
 229         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro6,2", M_MBP_6_2),
 230         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro7,1", M_MBP_7_1),
 231         EFIFB_DMI_SYSTEM_ID("Apple Inc.", "MacBookPro8,2", M_MBP_8_2),
 232         {},
 233 };
 234
 235 /*
 236  * Some devices have a portrait LCD but advertise a landscape resolution (and
 237  * pitch). We simply swap width and height for these devices so that we can
 238  * correctly deal with some of them coming with multiple resolutions.
 239  */
 240 static const struct dmi_system_id efifb_dmi_swap_width_height[] __initconst = {
 241         {
 242                 /*
 243                  * Lenovo MIIX310-10ICR, only some batches have the troublesome
 244                  * 800x1280 portrait screen. Luckily the portrait version has
 245                  * its own BIOS version, so we match on that.
 246                  */
 247                 .matches = {
 248                         DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 249                         DMI_EXACT_MATCH(DMI_PRODUCT_VERSION, "MIIX 310-10ICR"),
 250                         DMI_EXACT_MATCH(DMI_BIOS_VERSION, "1HCN44WW"),
 251                 },
 252         },
 253         {
 254                 /* Lenovo MIIX 320-10ICR with 800x1280 portrait screen */
 255                 .matches = {
 256                         DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 257                         DMI_EXACT_MATCH(DMI_PRODUCT_VERSION,
 258                                         "Lenovo MIIX 320-10ICR"),
 259                 },
 260         },
 261         {
 262                 /* Lenovo D330 with 800x1280 or 1200x1920 portrait screen */
 263                 .matches = {
 264                         DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"),
 265                         DMI_EXACT_MATCH(DMI_PRODUCT_VERSION,
 266                                         "Lenovo ideapad D330-10IGM"),
 267                 },
 268         },
 269         {},
 270 };
 271
 272 static bool efifb_overlaps_pci_range(const struct of_pci_range *range)
 273 {
 274         u64 fb_base = screen_info.lfb_base;
 275
 276         if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE)
 277                 fb_base |= (u64)(unsigned long)screen_info.ext_lfb_base << 32;
 278
 279         return fb_base >= range->cpu_addr &&
 280                fb_base < (range->cpu_addr + range->size);
 281 }
 282
 283 static struct device_node *find_pci_overlap_node(void)
 284 {
 285         struct device_node *np;
 286
 287         for_each_node_by_type(np, "pci") {
 288                 struct of_pci_range_parser parser;
 289                 struct of_pci_range range;
 290                 int err;
 291
 292                 err = of_pci_range_parser_init(&parser, np);
 293                 if (err) {
 294                         pr_warn("of_pci_range_parser_init() failed: %d\n", err);
 295                         continue;
 296                 }
 297
 298                 for_each_of_pci_range(&parser, &range)
 299                         if (efifb_overlaps_pci_range(&range))
 300                                 return np;
 301         }
 302         return NULL;
 303 }
 304
 305 /*
 306  * If the efifb framebuffer is backed by a PCI graphics controller, we have
 307  * to ensure that this relation is expressed using a device link when
 308  * running in DT mode, or the probe order may be reversed, resulting in a
 309  * resource reservation conflict on the memory window that the efifb
 310  * framebuffer steals from the PCIe host bridge.
 311  */
 312 static int efifb_add_links(struct fwnode_handle *fwnode)
 313 {
 314         struct device_node *sup_np;
 315
 316         sup_np = find_pci_overlap_node();
 317
 318         /*
 319          * If there's no PCI graphics controller backing the efifb, we are
 320          * done here.
 321          */
 322         if (!sup_np)
 323                 return 0;
 324
 325         fwnode_link_add(fwnode, of_fwnode_handle(sup_np));
 326         of_node_put(sup_np);
 327
 328         return 0;
 329 }
 330
 331 static const struct fwnode_operations efifb_fwnode_ops = {
 332         .add_links = efifb_add_links,
 333 };
 334
 335 #ifdef CONFIG_EFI
 336 static struct fwnode_handle efifb_fwnode;
 337
 338 __init void sysfb_apply_efi_quirks(struct platform_device *pd)
 339 {
 340         if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI ||
 341             !(screen_info.capabilities & VIDEO_CAPABILITY_SKIP_QUIRKS))
 342                 dmi_check_system(efifb_dmi_system_table);
 343
 344         if (screen_info.orig_video_isVGA == VIDEO_TYPE_EFI &&
 345             dmi_check_system(efifb_dmi_swap_width_height)) {
 346                 u16 temp = screen_info.lfb_width;
 347
 348                 screen_info.lfb_width = screen_info.lfb_height;
 349                 screen_info.lfb_height = temp;
 350                 screen_info.lfb_linelength = 4 * screen_info.lfb_width;
 351         }
 352
 353         if (screen_info.orig_video_isVGA == VIDEO_TYPE_EFI && IS_ENABLED(CONFIG_PCI)) {
 354                 fwnode_init(&efifb_fwnode, &efifb_fwnode_ops);
 355                 pd->dev.fwnode = &efifb_fwnode;
 356         }
 357 }
 358 #endif