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 enum {
  30         OVERRIDE_NONE = 0x0,
  31         OVERRIDE_BASE = 0x1,
  32         OVERRIDE_STRIDE = 0x2,
  33         OVERRIDE_HEIGHT = 0x4,
  34         OVERRIDE_WIDTH = 0x8,
  35 };
  36
  37 struct 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
  70 void 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
  94 static 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
 188 static 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  */
 238 static 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 static bool efifb_overlaps_pci_range(const struct of_pci_range *range)
 271 {
 272         u64 fb_base = screen_info.lfb_base;
 273
 274         if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE)
 275                 fb_base |= (u64)(unsigned long)screen_info.ext_lfb_base << 32;
 276
 277         return fb_base >= range->cpu_addr &&
 278                fb_base < (range->cpu_addr + range->size);
 279 }
 280
 281 static struct device_node *find_pci_overlap_node(void)
 282 {
 283         struct device_node *np;
 284
 285         for_each_node_by_type(np, "pci") {
 286                 struct of_pci_range_parser parser;
 287                 struct of_pci_range range;
 288                 int err;
 289
 290                 err = of_pci_range_parser_init(&parser, np);
 291                 if (err) {
 292                         pr_warn("of_pci_range_parser_init() failed: %d\n", err);
 293                         continue;
 294                 }
 295
 296                 for_each_of_pci_range(&parser, &range)
 297                         if (efifb_overlaps_pci_range(&range))
 298                                 return np;
 299         }
 300         return NULL;
 301 }
 302
 303 /*
 304  * If the efifb framebuffer is backed by a PCI graphics controller, we have
 305  * to ensure that this relation is expressed using a device link when
 306  * running in DT mode, or the probe order may be reversed, resulting in a
 307  * resource reservation conflict on the memory window that the efifb
 308  * framebuffer steals from the PCIe host bridge.
 309  */
 310 static int efifb_add_links(struct fwnode_handle *fwnode)
 311 {
 312         struct device_node *sup_np;
 313
 314         sup_np = find_pci_overlap_node();
 315
 316         /*
 317          * If there's no PCI graphics controller backing the efifb, we are
 318          * done here.
 319          */
 320         if (!sup_np)
 321                 return 0;
 322
 323         fwnode_link_add(fwnode, of_fwnode_handle(sup_np));
 324         of_node_put(sup_np);
 325
 326         return 0;
 327 }
 328
 329 static const struct fwnode_operations efifb_fwnode_ops = {
 330         .add_links = efifb_add_links,
 331 };
 332
 333 #ifdef CONFIG_EFI
 334 static struct fwnode_handle efifb_fwnode;
 335
 336 __init void sysfb_apply_efi_quirks(struct platform_device *pd)
 337 {
 338         if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI ||
 339             !(screen_info.capabilities & VIDEO_CAPABILITY_SKIP_QUIRKS))
 340                 dmi_check_system(efifb_dmi_system_table);
 341
 342         if (screen_info.orig_video_isVGA == VIDEO_TYPE_EFI &&
 343             dmi_check_system(efifb_dmi_swap_width_height)) {
 344                 u16 temp = screen_info.lfb_width;
 345
 346                 screen_info.lfb_width = screen_info.lfb_height;
 347                 screen_info.lfb_height = temp;
 348                 screen_info.lfb_linelength = 4 * screen_info.lfb_width;
 349         }
 350
 351         if (screen_info.orig_video_isVGA == VIDEO_TYPE_EFI && IS_ENABLED(CONFIG_PCI)) {
 352                 fwnode_init(&efifb_fwnode, &efifb_fwnode_ops);
 353                 pd->dev.fwnode = &efifb_fwnode;
 354         }
 355 }
 356 #endif