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
efifb_setup_from_dmi(struct screen_info * si,const char * opt)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
efifb_set_system(const struct dmi_system_id * id)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 /* Lenovo IdeaPad Duet 3 10IGL5 with 1200x1920 portrait screen */
271 .matches = {
272 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"),
273 DMI_EXACT_MATCH(DMI_PRODUCT_VERSION,
274 "IdeaPad Duet 3 10IGL5"),
275 },
276 },
277 {
278 /* Lenovo Yoga Book X91F / X91L */
279 .matches = {
280 DMI_EXACT_MATCH(DMI_SYS_VENDOR, "LENOVO"),
281 /* Non exact match to match F + L versions */
282 DMI_MATCH(DMI_PRODUCT_NAME, "Lenovo YB1-X91"),
283 },
284 },
285 {},
286 };
287
efifb_overlaps_pci_range(const struct of_pci_range * range)288 static bool efifb_overlaps_pci_range(const struct of_pci_range *range)
289 {
290 u64 fb_base = screen_info.lfb_base;
291
292 if (screen_info.capabilities & VIDEO_CAPABILITY_64BIT_BASE)
293 fb_base |= (u64)(unsigned long)screen_info.ext_lfb_base << 32;
294
295 return fb_base >= range->cpu_addr &&
296 fb_base < (range->cpu_addr + range->size);
297 }
298
find_pci_overlap_node(void)299 static struct device_node *find_pci_overlap_node(void)
300 {
301 struct device_node *np;
302
303 for_each_node_by_type(np, "pci") {
304 struct of_pci_range_parser parser;
305 struct of_pci_range range;
306 int err;
307
308 err = of_pci_range_parser_init(&parser, np);
309 if (err) {
310 pr_warn("of_pci_range_parser_init() failed: %d\n", err);
311 continue;
312 }
313
314 for_each_of_pci_range(&parser, &range)
315 if (efifb_overlaps_pci_range(&range))
316 return np;
317 }
318 return NULL;
319 }
320
321 /*
322 * If the efifb framebuffer is backed by a PCI graphics controller, we have
323 * to ensure that this relation is expressed using a device link when
324 * running in DT mode, or the probe order may be reversed, resulting in a
325 * resource reservation conflict on the memory window that the efifb
326 * framebuffer steals from the PCIe host bridge.
327 */
efifb_add_links(struct fwnode_handle * fwnode)328 static int efifb_add_links(struct fwnode_handle *fwnode)
329 {
330 struct device_node *sup_np;
331
332 sup_np = find_pci_overlap_node();
333
334 /*
335 * If there's no PCI graphics controller backing the efifb, we are
336 * done here.
337 */
338 if (!sup_np)
339 return 0;
340
341 fwnode_link_add(fwnode, of_fwnode_handle(sup_np));
342 of_node_put(sup_np);
343
344 return 0;
345 }
346
347 static const struct fwnode_operations efifb_fwnode_ops = {
348 .add_links = efifb_add_links,
349 };
350
351 #ifdef CONFIG_EFI
352 static struct fwnode_handle efifb_fwnode;
353
sysfb_apply_efi_quirks(void)354 __init void sysfb_apply_efi_quirks(void)
355 {
356 if (screen_info.orig_video_isVGA != VIDEO_TYPE_EFI ||
357 !(screen_info.capabilities & VIDEO_CAPABILITY_SKIP_QUIRKS))
358 dmi_check_system(efifb_dmi_system_table);
359
360 if (screen_info.orig_video_isVGA == VIDEO_TYPE_EFI &&
361 dmi_check_system(efifb_dmi_swap_width_height)) {
362 u16 temp = screen_info.lfb_width;
363
364 screen_info.lfb_width = screen_info.lfb_height;
365 screen_info.lfb_height = temp;
366 screen_info.lfb_linelength = 4 * screen_info.lfb_width;
367 }
368 }
369
sysfb_set_efifb_fwnode(struct platform_device * pd)370 __init void sysfb_set_efifb_fwnode(struct platform_device *pd)
371 {
372 if (screen_info.orig_video_isVGA == VIDEO_TYPE_EFI && IS_ENABLED(CONFIG_PCI)) {
373 fwnode_init(&efifb_fwnode, &efifb_fwnode_ops);
374 pd->dev.fwnode = &efifb_fwnode;
375 }
376 }
377 #endif
378